Thin Asphalt Concrete Applications
501.01 Description.
501.01.1 General: Furnish and construct one or more courses of
asphalt concrete mixture in conformance with these specifications and in conformity with the lines, grades, thicknesses, and typical sections shown on the plans or established. Comply with Section 503 , Equipment and Processes and the Application of Quality Assurance Specifications for Asphalt Concrete Mixtures (QA Manual). These specifications apply to all asphalt concrete mixtures with plan thicknesses less than 1½ inches. The following mixtures are further described herein and as shown on the plans:
1.Dense Mix – allowed for traffic volumes < 3,500 ADT.
2.Coarse Mix – allowed for all traffic volumes. Can be subst ituted for Dense Mix without change order.
3.Open Graded Friction Course (OGFC) – allowed for all levels of traffic volume, and required when used on Interstate Highway System. The OGFC can be substituted for any Thin Asphalt Concrete application without change order. Use the same mixture type throughout the project length unless approved otherwise by the engineer.
501.01.2 Quality Assurance: It is the intent of these specifications
that the mixtures produced and placed meet the requirements for 100 percent payme nt. Work shall meet the requirements of this section and be subject to acceptance by the Department. Exercise quality control as defined in 101.03 . When these sp ecifications are not being met and satisfactory control adjustments are not being made, discontinue operations and notify the project engineer immediately until proper adjustments and uniform operations are established. Accomplish control by a program ind ependent of the Department's testing and ensure that the requirements of the job mix formula (JMF) are being achieved and that necessary adjustments provide the specified results. Do not begin daily plant operations unless the contractors’ Certified Asphal t Concrete Plant Technician (Level 2 or Level 3) is at the plant. When the plant is in operation, have a Certified Asphalt Concrete Plant Technician at the plant or jobsite. Thin Asphalt Concrete Applications
501.01 Description.
501.01.1 General: Furnish and construct one or more courses of
asphalt concrete mixture in conformance with these specifications and in conformity with the lines, grades, thicknesses, and typical sections shown on the plans or established. Comply with Section 503 , Equipment and Processes and the Application of Quality Assurance Specifications for Asphalt Concrete Mixtures (QA Manual). These specifications apply to all asphalt concrete mixtures with plan thicknesses less than 1½ inches. The following mixtures are further described herein and as shown on the plans:
1.Dense Mix – allowed for traffic volumes < 3,500 ADT.
2.Coarse Mix – allowed for all traffic volumes. Can be subst ituted for Dense Mix without change order.
3.Open Graded Friction Course (OGFC) – allowed for all levels of traffic volume, and required when used on Interstate Highway System. The OGFC can be substituted for any Thin Asphalt Concrete application without change order. Use the same mixture type throughout the project length unless approved otherwise by the engineer.
501.01.2 Quality Assurance: It is the intent of these specifications
that the mixtures produced and placed meet the requirements for 100 percent payme nt. Work shall meet the requirements of this section and be subject to acceptance by the Department. Exercise quality control as defined in 101.03 . When these sp ecifications are not being met and satisfactory control adjustments are not being made, discontinue operations and notify the project engineer immediately until proper adjustments and uniform operations are established. Accomplish control by a program ind ependent of the Department's testing and ensure that the requirements of the job mix formula (JMF) are being achieved and that necessary adjustments provide the specified results. Do not begin daily plant operations unless the contractors’ Certified Asphal t Concrete Plant Technician (Level 2 or Level 3) is at the plant. When the plant is in operation, have a Certified Asphalt Concrete Plant Technician at the plant or jobsite. Thin Asphalt Concrete Applications
501.01 Description.
501.01.1 General: Furnish and construct one or more courses of
asphalt concrete mixture in conformance with these specifications and in conformity with the lines, grades, thicknesses, and typical sections shown on the plans or established. Comply with Section 503 , Equipment and Processes and the Application of Quality Assurance Specifications for Asphalt Concrete Mixtures (QA Manual). These specifications apply to all asphalt concrete mixtures with plan thicknesses less than 1½ inches. The following mixtures are further described herein and as shown on the plans:
1.Dense Mix – allowed for traffic volumes < 3,500 ADT.
2.Coarse Mix – allowed for all traffic volumes. Can be subst ituted for Dense Mix without change order.
3.Open Graded Friction Course (OGFC) – allowed for all levels of traffic volume, and required when used on Interstate Highway System. The OGFC can be substituted for any Thin Asphalt Concrete application without change order. Use the same mixture type throughout the project length unless approved otherwise by the engineer.
501.01.2 Quality Assurance: It is the intent of these specifications
that the mixtures produced and placed meet the requirements for 100 percent payme nt. Work shall meet the requirements of this section and be subject to acceptance by the Department. Exercise quality control as defined in 101.03 . When these sp ecifications are not being met and satisfactory control adjustments are not being made, discontinue operations and notify the project engineer immediately until proper adjustments and uniform operations are established. Accomplish control by a program ind ependent of the Department's testing and ensure that the requirements of the job mix formula (JMF) are being achieved and that necessary adjustments provide the specified results. Do not begin daily plant operations unless the contractors’ Certified Asphal t Concrete Plant Technician (Level 2 or Level 3) is at the plant. When the plant is in operation, have a Certified Asphalt Concrete Plant Technician at the plant or jobsite.
501.02 MATERIALS. Sample and test in accordance with the Material
Sampling Manual and the test procedures described in Table 502 -1 Keep accurate records including proof of deliveries of materials for use in these processes. Ensure that materials comply with the following Sections and Subsections and as specified in this section: Asphalt Section 1002 Anti-Strip Additives 1002.02.1 Aggregates 1003.01 & 1003.06 Hydrated Lime 1018.02 Crumb Rubber 1002.02.2 Mix Release Agent 1018.10 Fibers 1002.02.5
501.02.1 Tack Coat: Ensure that tack coat meets the requirements of
Section 1002 . Apply tack coat as described in 501.08.1 . Application rates are defined in Table 501 -1. Use emulsion s listed in the Approved Materials List. For dense mixtures, apply a NTSS -1HM, SS -1H, CSS -1H, CSS -1HP, or a hot applied non -tracking tack (NTHAP). For coarse and OGFC mixtures, apply a Polymer Emulsion Tack (PET) or SS -1L using the spray paver as descri bed in Section 503 . On all non -interstate roadways, if not using a spray paver, use a hot applied non -tracking (NTHAP).
501.02.2 Asphalt Cement: Use asphalt cement grades as specified
in Table 501 -1. If the asphalt cement does not comply with the requirements of Section 1002 , notify the project engineer and cease mix production unt il proper asphalt material is supplied. Allow grade substitution as specified in Section 502 . PG82 -22rm may be substituted for PG76 -22m or PG70 -22m.
501.02.3 Additives: Use anti -stripping additives from a source listed
on the Approved Materials List. Add anti -strip at a minimum rate of 0.6 percent. Hydrated lime additive may be incorporated into all asphalt concrete mixtures at the rate specified in the approved JMF. Ad d hydrated lime and thoroughly mix with aggregates in conformance with 503.05.5 . Hydrated lime may be added as mineral filler in accordance with 503.05.4 and 1003.06.6 .
501.02 MATERIALS. Sample and test in accordance with the Material
Sampling Manual and the test procedures described in Table 502 -1 Keep accurate records including proof of deliveries of materials for use in these processes. Ensure that materials comply with the following Sections and Subsections and as specified in this section: Asphalt Section 1002 Anti-Strip Additives 1002.02.1 Aggregates 1003.01 & 1003.06 Hydrated Lime 1018.02 Crumb Rubber 1002.02.2 Mix Release Agent 1018.10 Fibers 1002.02.5
501.02.1 Tack Coat: Ensure that tack coat meets the requirements of
Section 1002 . Apply tack coat as described in 501.08.1 . Application rates are defined in Table 501 -1. Use emulsion s listed in the Approved Materials List. For dense mixtures, apply a NTSS -1HM, SS -1H, CSS -1H, CSS -1HP, or a hot applied non -tracking tack (NTHAP). For coarse and OGFC mixtures, apply a Polymer Emulsion Tack (PET) or SS -1L using the spray paver as descri bed in Section 503 . On all non -interstate roadways, if not using a spray paver, use a hot applied non -tracking (NTHAP).
501.02.2 Asphalt Cement: Use asphalt cement grades as specified
in Table 501 -1. If the asphalt cement does not comply with the requirements of Section 1002 , notify the project engineer and cease mix production unt il proper asphalt material is supplied. Allow grade substitution as specified in Section 502 . PG82 -22rm may be substituted for PG76 -22m or PG70 -22m.
501.02.3 Additives: Use anti -stripping additives from a source listed
on the Approved Materials List. Add anti -strip at a minimum rate of 0.6 percent. Hydrated lime additive may be incorporated into all asphalt concrete mixtures at the rate specified in the approved JMF. Ad d hydrated lime and thoroughly mix with aggregates in conformance with 503.05.5 . Hydrated lime may be added as mineral filler in accordance with 503.05.4 and 1003.06.6 .
501.02 MATERIALS. Sample and test in accordance with the Material
Sampling Manual and the test procedures described in Table 502 -1 Keep accurate records including proof of deliveries of materials for use in these processes. Ensure that materials comply with the following Sections and Subsections and as specified in this section: Asphalt Section 1002 Anti-Strip Additives 1002.02.1 Aggregates 1003.01 & 1003.06 Hydrated Lime 1018.02 Crumb Rubber 1002.02.2 Mix Release Agent 1018.10 Fibers 1002.02.5
501.02.1 Tack Coat: Ensure that tack coat meets the requirements of
Section 1002 . Apply tack coat as described in 501.08.1 . Application rates are defined in Table 501 -1. Use emulsion s listed in the Approved Materials List. For dense mixtures, apply a NTSS -1HM, SS -1H, CSS -1H, CSS -1HP, or a hot applied non -tracking tack (NTHAP). For coarse and OGFC mixtures, apply a Polymer Emulsion Tack (PET) or SS -1L using the spray paver as descri bed in Section 503 . On all non -interstate roadways, if not using a spray paver, use a hot applied non -tracking (NTHAP).
501.02.2 Asphalt Cement: Use asphalt cement grades as specified
in Table 501 -1. If the asphalt cement does not comply with the requirements of Section 1002 , notify the project engineer and cease mix production unt il proper asphalt material is supplied. Allow grade substitution as specified in Section 502 . PG82 -22rm may be substituted for PG76 -22m or PG70 -22m.
501.02.3 Additives: Use anti -stripping additives from a source listed
on the Approved Materials List. Add anti -strip at a minimum rate of 0.6 percent. Hydrated lime additive may be incorporated into all asphalt concrete mixtures at the rate specified in the approved JMF. Ad d hydrated lime and thoroughly mix with aggregates in conformance with 503.05.5 . Hydrated lime may be added as mineral filler in accordance with 503.05.4 and 1003.06.6 .
501.02 MATERIALS. Sample and test in accordance with the Material
Sampling Manual and the test procedures described in Table 502 -1 Keep accurate records including proof of deliveries of materials for use in these processes. Ensure that materials comply with the following Sections and Subsections and as specified in this section: Asphalt Section 1002 Anti-Strip Additives 1002.02.1 Aggregates 1003.01 & 1003.06 Hydrated Lime 1018.02 Crumb Rubber 1002.02.2 Mix Release Agent 1018.10 Fibers 1002.02.5
501.02.1 Tack Coat: Ensure that tack coat meets the requirements of
Section 1002 . Apply tack coat as described in 501.08.1 . Application rates are defined in Table 501 -1. Use emulsion s listed in the Approved Materials List. For dense mixtures, apply a NTSS -1HM, SS -1H, CSS -1H, CSS -1HP, or a hot applied non -tracking tack (NTHAP). For coarse and OGFC mixtures, apply a Polymer Emulsion Tack (PET) or SS -1L using the spray paver as descri bed in Section 503 . On all non -interstate roadways, if not using a spray paver, use a hot applied non -tracking (NTHAP).
501.02.2 Asphalt Cement: Use asphalt cement grades as specified
in Table 501 -1. If the asphalt cement does not comply with the requirements of Section 1002 , notify the project engineer and cease mix production unt il proper asphalt material is supplied. Allow grade substitution as specified in Section 502 . PG82 -22rm may be substituted for PG76 -22m or PG70 -22m.
501.02.3 Additives: Use anti -stripping additives from a source listed
on the Approved Materials List. Add anti -strip at a minimum rate of 0.6 percent. Hydrated lime additive may be incorporated into all asphalt concrete mixtures at the rate specified in the approved JMF. Ad d hydrated lime and thoroughly mix with aggregates in conformance with 503.05.5 . Hydrated lime may be added as mineral filler in accordance with 503.05.4 and 1003.06.6 .
501.02 MATERIALS. Sample and test in accordance with the Material
Sampling Manual and the test procedures described in Table 502 -1 Keep accurate records including proof of deliveries of materials for use in these processes. Ensure that materials comply with the following Sections and Subsections and as specified in this section: Asphalt Section 1002 Anti-Strip Additives 1002.02.1 Aggregates 1003.01 & 1003.06 Hydrated Lime 1018.02 Crumb Rubber 1002.02.2 Mix Release Agent 1018.10 Fibers 1002.02.5
501.02.1 Tack Coat: Ensure that tack coat meets the requirements of
Section 1002 . Apply tack coat as described in 501.08.1 . Application rates are defined in Table 501 -1. Use emulsion s listed in the Approved Materials List. For dense mixtures, apply a NTSS -1HM, SS -1H, CSS -1H, CSS -1HP, or a hot applied non -tracking tack (NTHAP). For coarse and OGFC mixtures, apply a Polymer Emulsion Tack (PET) or SS -1L using the spray paver as descri bed in Section 503 . On all non -interstate roadways, if not using a spray paver, use a hot applied non -tracking (NTHAP).
501.02.2 Asphalt Cement: Use asphalt cement grades as specified
in Table 501 -1. If the asphalt cement does not comply with the requirements of Section 1002 , notify the project engineer and cease mix production unt il proper asphalt material is supplied. Allow grade substitution as specified in Section 502 . PG82 -22rm may be substituted for PG76 -22m or PG70 -22m.
501.02.3 Additives: Use anti -stripping additives from a source listed
on the Approved Materials List. Add anti -strip at a minimum rate of 0.6 percent. Hydrated lime additive may be incorporated into all asphalt concrete mixtures at the rate specified in the approved JMF. Ad d hydrated lime and thoroughly mix with aggregates in conformance with 503.05.5 . Hydrated lime may be added as mineral filler in accordance with 503.05.4 and 1003.06.6 .
501.02.4 Aggregates: Use an aggregate from Approved Material
List with a maximum water absorption of 2 percent as reported on the Approved Material List. For Dense Mix, use aggregate from Approved Materials List. Use aggregate that meets requirement s of 1003.06 . Submit a Certificate of Analysis with the JMF to the District Laboratory Engineer indicating conformance to Table 501 -2.
501.02.5 Mineral Filler: If used, meet the requirements of
1003.06.6 .
501.02.6 Grit: When required to prevent draindown, use cellulose or
mineral fiber, meeting the requirements of 1002.02. 5. When used, add fibers at a rate sufficient to prevent draindown.
501.03 Design of Thin Aspha Lt Concrete Mixtures .
Submit an aggregate gradation that conforms to Table 501 -3 along with the Certificates of Analysis required in 501.02.4 . Aggregate friction rating for coarse mix and OGFC will be in accordance with Table 502 -3. Design dense and coarse mixtures to midpoint of voids using the gyratory requirements of Table 501 -1. For design of OGFC mixtures, the full range of void requirements is allowed. Report the corresponding asphalt content on the JMF. For all mixtures, submit to the District Laboratory Engineer a JMF proposal for approval which is representative of the mixture that will be produced and meets the design requirements prior to validation or production. Prior to JMF approval, present a Certificate of Analysis showing aggregate physical properties conforming to Table 501 -2. Design and report mix temperatures between 300 ⁰F and 350 ⁰F on the JMF. A change in the asphalt cement source will require testing for Moisture Susceptibility in accordance with DOTD TR 317 and either AASHTO T324 or DOTD TR 322.
501.04 LOT SIZES. A lot is a segment of continuous production of
asphalt concrete mixture from the same JMF produced for the Department at a specific plant, delivered to a specific DOTD pro ject. A lot is defined as 2400 tons of mixture production, a sublot is 800 tons. The final lot may be increased up to 50 percent of an original lot size with the mutual agreement of the contractor and Project Engineer.
501.02.4 Aggregates: Use an aggregate from Approved Material
List with a maximum water absorption of 2 percent as reported on the Approved Material List. For Dense Mix, use aggregate from Approved Materials List. Use aggregate that meets requirement s of 1003.06 . Submit a Certificate of Analysis with the JMF to the District Laboratory Engineer indicating conformance to Table 501 -2.
501.02.5 Mineral Filler: If used, meet the requirements of
1003.06.6 .
501.02.6 Grit: When required to prevent draindown, use cellulose or
mineral fiber, meeting the requirements of 1002.02. 5. When used, add fibers at a rate sufficient to prevent draindown.
501.03 Design of Thin Aspha Lt Concrete Mixtures .
Submit an aggregate gradation that conforms to Table 501 -3 along with the Certificates of Analysis required in 501.02.4 . Aggregate friction rating for coarse mix and OGFC will be in accordance with Table 502 -3. Design dense and coarse mixtures to midpoint of voids using the gyratory requirements of Table 501 -1. For design of OGFC mixtures, the full range of void requirements is allowed. Report the corresponding asphalt content on the JMF. For all mixtures, submit to the District Laboratory Engineer a JMF proposal for approval which is representative of the mixture that will be produced and meets the design requirements prior to validation or production. Prior to JMF approval, present a Certificate of Analysis showing aggregate physical properties conforming to Table 501 -2. Design and report mix temperatures between 300 ⁰F and 350 ⁰F on the JMF. A change in the asphalt cement source will require testing for Moisture Susceptibility in accordance with DOTD TR 317 and either AASHTO T324 or DOTD TR 322.
501.04 LOT SIZES. A lot is a segment of continuous production of
asphalt concrete mixture from the same JMF produced for the Department at a specific plant, delivered to a specific DOTD pro ject. A lot is defined as 2400 tons of mixture production, a sublot is 800 tons. The final lot may be increased up to 50 percent of an original lot size with the mutual agreement of the contractor and Project Engineer.
501.02.4 Aggregates: Use an aggregate from Approved Material
List with a maximum water absorption of 2 percent as reported on the Approved Material List. For Dense Mix, use aggregate from Approved Materials List. Use aggregate that meets requirement s of 1003.06 . Submit a Certificate of Analysis with the JMF to the District Laboratory Engineer indicating conformance to Table 501 -2.
501.02.5 Mineral Filler: If used, meet the requirements of
1003.06.6 .
501.02.6 Grit: When required to prevent draindown, use cellulose or
mineral fiber, meeting the requirements of 1002.02. 5. When used, add fibers at a rate sufficient to prevent draindown.
501.03 Design of Thin Aspha Lt Concrete Mixtures .
Submit an aggregate gradation that conforms to Table 501 -3 along with the Certificates of Analysis required in 501.02.4 . Aggregate friction rating for coarse mix and OGFC will be in accordance with Table 502 -3. Design dense and coarse mixtures to midpoint of voids using the gyratory requirements of Table 501 -1. For design of OGFC mixtures, the full range of void requirements is allowed. Report the corresponding asphalt content on the JMF. For all mixtures, submit to the District Laboratory Engineer a JMF proposal for approval which is representative of the mixture that will be produced and meets the design requirements prior to validation or production. Prior to JMF approval, present a Certificate of Analysis showing aggregate physical properties conforming to Table 501 -2. Design and report mix temperatures between 300 ⁰F and 350 ⁰F on the JMF. A change in the asphalt cement source will require testing for Moisture Susceptibility in accordance with DOTD TR 317 and either AASHTO T324 or DOTD TR 322.
501.04 LOT SIZES. A lot is a segment of continuous production of
asphalt concrete mixture from the same JMF produced for the Department at a specific plant, delivered to a specific DOTD pro ject. A lot is defined as 2400 tons of mixture production, a sublot is 800 tons. The final lot may be increased up to 50 percent of an original lot size with the mutual agreement of the contractor and Project Engineer.
501.02.4 Aggregates: Use an aggregate from Approved Material
List with a maximum water absorption of 2 percent as reported on the Approved Material List. For Dense Mix, use aggregate from Approved Materials List. Use aggregate that meets requirement s of 1003.06 . Submit a Certificate of Analysis with the JMF to the District Laboratory Engineer indicating conformance to Table 501 -2.
501.02.5 Mineral Filler: If used, meet the requirements of
1003.06.6 .
501.02.6 Grit: When required to prevent draindown, use cellulose or
mineral fiber, meeting the requirements of 1002.02. 5. When used, add fibers at a rate sufficient to prevent draindown.
501.03 Design of Thin Aspha Lt Concrete Mixtures .
Submit an aggregate gradation that conforms to Table 501 -3 along with the Certificates of Analysis required in 501.02.4 . Aggregate friction rating for coarse mix and OGFC will be in accordance with Table 502 -3. Design dense and coarse mixtures to midpoint of voids using the gyratory requirements of Table 501 -1. For design of OGFC mixtures, the full range of void requirements is allowed. Report the corresponding asphalt content on the JMF. For all mixtures, submit to the District Laboratory Engineer a JMF proposal for approval which is representative of the mixture that will be produced and meets the design requirements prior to validation or production. Prior to JMF approval, present a Certificate of Analysis showing aggregate physical properties conforming to Table 501 -2. Design and report mix temperatures between 300 ⁰F and 350 ⁰F on the JMF. A change in the asphalt cement source will require testing for Moisture Susceptibility in accordance with DOTD TR 317 and either AASHTO T324 or DOTD TR 322.
501.04 LOT SIZES. A lot is a segment of continuous production of
asphalt concrete mixture from the same JMF produced for the Department at a specific plant, delivered to a specific DOTD pro ject. A lot is defined as 2400 tons of mixture production, a sublot is 800 tons. The final lot may be increased up to 50 percent of an original lot size with the mutual agreement of the contractor and Project Engineer.
501.02.4 Aggregates: Use an aggregate from Approved Material
List with a maximum water absorption of 2 percent as reported on the Approved Material List. For Dense Mix, use aggregate from Approved Materials List. Use aggregate that meets requirement s of 1003.06 . Submit a Certificate of Analysis with the JMF to the District Laboratory Engineer indicating conformance to Table 501 -2.
501.02.5 Mineral Filler: If used, meet the requirements of
1003.06.6 .
501.02.6 Grit: When required to prevent draindown, use cellulose or
mineral fiber, meeting the requirements of 1002.02. 5. When used, add fibers at a rate sufficient to prevent draindown.
501.03 Design of Thin Aspha Lt Concrete Mixtures .
Submit an aggregate gradation that conforms to Table 501 -3 along with the Certificates of Analysis required in 501.02.4 . Aggregate friction rating for coarse mix and OGFC will be in accordance with Table 502 -3. Design dense and coarse mixtures to midpoint of voids using the gyratory requirements of Table 501 -1. For design of OGFC mixtures, the full range of void requirements is allowed. Report the corresponding asphalt content on the JMF. For all mixtures, submit to the District Laboratory Engineer a JMF proposal for approval which is representative of the mixture that will be produced and meets the design requirements prior to validation or production. Prior to JMF approval, present a Certificate of Analysis showing aggregate physical properties conforming to Table 501 -2. Design and report mix temperatures between 300 ⁰F and 350 ⁰F on the JMF. A change in the asphalt cement source will require testing for Moisture Susceptibility in accordance with DOTD TR 317 and either AASHTO T324 or DOTD TR 322.
501.04 LOT SIZES. A lot is a segment of continuous production of
asphalt concrete mixture from the same JMF produced for the Department at a specific plant, delivered to a specific DOTD pro ject. A lot is defined as 2400 tons of mixture production, a sublot is 800 tons. The final lot may be increased up to 50 percent of an original lot size with the mutual agreement of the contractor and Project Engineer.
501.02.4 Aggregates: Use an aggregate from Approved Material
List with a maximum water absorption of 2 percent as reported on the Approved Material List. For Dense Mix, use aggregate from Approved Materials List. Use aggregate that meets requirement s of 1003.06 . Submit a Certificate of Analysis with the JMF to the District Laboratory Engineer indicating conformance to Table 501 -2.
501.02.5 Mineral Filler: If used, meet the requirements of
1003.06.6 .
501.02.6 Grit: When required to prevent draindown, use cellulose or
mineral fiber, meeting the requirements of 1002.02. 5. When used, add fibers at a rate sufficient to prevent draindown.
501.03 Design of Thin Aspha Lt Concrete Mixtures .
Submit an aggregate gradation that conforms to Table 501 -3 along with the Certificates of Analysis required in 501.02.4 . Aggregate friction rating for coarse mix and OGFC will be in accordance with Table 502 -3. Design dense and coarse mixtures to midpoint of voids using the gyratory requirements of Table 501 -1. For design of OGFC mixtures, the full range of void requirements is allowed. Report the corresponding asphalt content on the JMF. For all mixtures, submit to the District Laboratory Engineer a JMF proposal for approval which is representative of the mixture that will be produced and meets the design requirements prior to validation or production. Prior to JMF approval, present a Certificate of Analysis showing aggregate physical properties conforming to Table 501 -2. Design and report mix temperatures between 300 ⁰F and 350 ⁰F on the JMF. A change in the asphalt cement source will require testing for Moisture Susceptibility in accordance with DOTD TR 317 and either AASHTO T324 or DOTD TR 322.
501.04 LOT SIZES. A lot is a segment of continuous production of
asphalt concrete mixture from the same JMF produced for the Department at a specific plant, delivered to a specific DOTD pro ject. A lot is defined as 2400 tons of mixture production, a sublot is 800 tons. The final lot may be increased up to 50 percent of an original lot size with the mutual agreement of the contractor and Project Engineer.
501.05 JOB MIX FORMULA (JMF ) VALIDATION . Validate the JMF
on the first lot (1200 ton, 3 -400 ton sublots) of production for a project by meeting the requirements of Table 501 -1 and Table 501 -3. The District Laboratory and Contractor shall jointly test three sublots for theoretical maximum specific gravity (G mm), percent air voids, percent asphalt cement content, and extracted aggregate gradation. Each individual test result shall meet specific ations. The average values will be used for verification tolerances in Table 501 -4. Validate the mixture using AASHTO T324 loaded wheel and Gyratory AASHTO T312 through testing of gyratory mix or roadway core on the second day of production. If failure occ urs, adjust mix and revalidate. If second failure occurs, redesign the mix. All JMF’s shall be re -validated a minimum of every 2 years. Re -validation may consist of reviewing ongoing production plant data and plant verification data.
501.06 PLANT QUALITY CONTR OL. Ensure that the plant
equipment and processes conform to Section 503 . Produce mixtures at temperatures not to exceed 350 ⁰F. Sample and test according to t he Materials Sampling Manual. Prepare Gyratory specimen in accordance with AASHTO T312. Any change in material will require a new approved JMF. Keep accurate records, including proof of deliveries of all materials used in this process. Sample and test the mixture for extracted aggregate gradation, asphalt cement content, and theoretical maximum specific gravity (G mm) testing at the frequency listed in the Materials Sampling Manual. Ensure that the average individual deviations from JMF target values of each test result meet the requirements of Table 501 -4. For each lot, report all quality control data to the Department’s Certified Plant Inspector. Apply the extracted gradation tolerances listed in Table 501 -3 to the JMF design target gradation. Ensure that JMF target is within the range of extracted aggregate gradation listed in 501-3. The District Laboratory Engineer may require re -validation of the mix when the average of the Quality Control data indicates non -compliance with the specified limits or tolerances. Control charts may be requested by the engineer if mixture problems develop.
501.06.1 Acceptance and Verification: Meet the verification
requirements of Table 501 -3 and Table 501 -04 tolerances. The Department will:
501.05 JOB MIX FORMULA (JMF ) VALIDATION . Validate the JMF
on the first lot (1200 ton, 3 -400 ton sublots) of production for a project by meeting the requirements of Table 501 -1 and Table 501 -3. The District Laboratory and Contractor shall jointly test three sublots for theoretical maximum specific gravity (G mm), percent air voids, percent asphalt cement content, and extracted aggregate gradation. Each individual test result shall meet specific ations. The average values will be used for verification tolerances in Table 501 -4. Validate the mixture using AASHTO T324 loaded wheel and Gyratory AASHTO T312 through testing of gyratory mix or roadway core on the second day of production. If failure occ urs, adjust mix and revalidate. If second failure occurs, redesign the mix. All JMF’s shall be re -validated a minimum of every 2 years. Re -validation may consist of reviewing ongoing production plant data and plant verification data.
501.06 PLANT QUALITY CONTR OL. Ensure that the plant
equipment and processes conform to Section 503 . Produce mixtures at temperatures not to exceed 350 ⁰F. Sample and test according to t he Materials Sampling Manual. Prepare Gyratory specimen in accordance with AASHTO T312. Any change in material will require a new approved JMF. Keep accurate records, including proof of deliveries of all materials used in this process. Sample and test the mixture for extracted aggregate gradation, asphalt cement content, and theoretical maximum specific gravity (G mm) testing at the frequency listed in the Materials Sampling Manual. Ensure that the average individual deviations from JMF target values of each test result meet the requirements of Table 501 -4. For each lot, report all quality control data to the Department’s Certified Plant Inspector. Apply the extracted gradation tolerances listed in Table 501 -3 to the JMF design target gradation. Ensure that JMF target is within the range of extracted aggregate gradation listed in 501-3. The District Laboratory Engineer may require re -validation of the mix when the average of the Quality Control data indicates non -compliance with the specified limits or tolerances. Control charts may be requested by the engineer if mixture problems develop.
501.06.1 Acceptance and Verification: Meet the verification
requirements of Table 501 -3 and Table 501 -04 tolerances. The Department will:
501.05 JOB MIX FORMULA (JMF ) VALIDATION . Validate the JMF
on the first lot (1200 ton, 3 -400 ton sublots) of production for a project by meeting the requirements of Table 501 -1 and Table 501 -3. The District Laboratory and Contractor shall jointly test three sublots for theoretical maximum specific gravity (G mm), percent air voids, percent asphalt cement content, and extracted aggregate gradation. Each individual test result shall meet specific ations. The average values will be used for verification tolerances in Table 501 -4. Validate the mixture using AASHTO T324 loaded wheel and Gyratory AASHTO T312 through testing of gyratory mix or roadway core on the second day of production. If failure occ urs, adjust mix and revalidate. If second failure occurs, redesign the mix. All JMF’s shall be re -validated a minimum of every 2 years. Re -validation may consist of reviewing ongoing production plant data and plant verification data.
501.06 PLANT QUALITY CONTR OL. Ensure that the plant
equipment and processes conform to Section 503 . Produce mixtures at temperatures not to exceed 350 ⁰F. Sample and test according to t he Materials Sampling Manual. Prepare Gyratory specimen in accordance with AASHTO T312. Any change in material will require a new approved JMF. Keep accurate records, including proof of deliveries of all materials used in this process. Sample and test the mixture for extracted aggregate gradation, asphalt cement content, and theoretical maximum specific gravity (G mm) testing at the frequency listed in the Materials Sampling Manual. Ensure that the average individual deviations from JMF target values of each test result meet the requirements of Table 501 -4. For each lot, report all quality control data to the Department’s Certified Plant Inspector. Apply the extracted gradation tolerances listed in Table 501 -3 to the JMF design target gradation. Ensure that JMF target is within the range of extracted aggregate gradation listed in 501-3. The District Laboratory Engineer may require re -validation of the mix when the average of the Quality Control data indicates non -compliance with the specified limits or tolerances. Control charts may be requested by the engineer if mixture problems develop.
501.06.1 Acceptance and Verification: Meet the verification
requirements of Table 501 -3 and Table 501 -04 tolerances. The Department will:
501.05 JOB MIX FORMULA (JMF ) VALIDATION . Validate the JMF
on the first lot (1200 ton, 3 -400 ton sublots) of production for a project by meeting the requirements of Table 501 -1 and Table 501 -3. The District Laboratory and Contractor shall jointly test three sublots for theoretical maximum specific gravity (G mm), percent air voids, percent asphalt cement content, and extracted aggregate gradation. Each individual test result shall meet specific ations. The average values will be used for verification tolerances in Table 501 -4. Validate the mixture using AASHTO T324 loaded wheel and Gyratory AASHTO T312 through testing of gyratory mix or roadway core on the second day of production. If failure occ urs, adjust mix and revalidate. If second failure occurs, redesign the mix. All JMF’s shall be re -validated a minimum of every 2 years. Re -validation may consist of reviewing ongoing production plant data and plant verification data.
501.06 PLANT QUALITY CONTR OL. Ensure that the plant
equipment and processes conform to Section 503 . Produce mixtures at temperatures not to exceed 350 ⁰F. Sample and test according to t he Materials Sampling Manual. Prepare Gyratory specimen in accordance with AASHTO T312. Any change in material will require a new approved JMF. Keep accurate records, including proof of deliveries of all materials used in this process. Sample and test the mixture for extracted aggregate gradation, asphalt cement content, and theoretical maximum specific gravity (G mm) testing at the frequency listed in the Materials Sampling Manual. Ensure that the average individual deviations from JMF target values of each test result meet the requirements of Table 501 -4. For each lot, report all quality control data to the Department’s Certified Plant Inspector. Apply the extracted gradation tolerances listed in Table 501 -3 to the JMF design target gradation. Ensure that JMF target is within the range of extracted aggregate gradation listed in 501-3. The District Laboratory Engineer may require re -validation of the mix when the average of the Quality Control data indicates non -compliance with the specified limits or tolerances. Control charts may be requested by the engineer if mixture problems develop.
501.06.1 Acceptance and Verification: Meet the verification
requirements of Table 501 -3 and Table 501 -04 tolerances. The Department will:
1.Perform all acceptance and verification testing using the stratified random sampling approach in accordance with S605 of the Materials Sampling Manual.
2.Sample and test the mixture for Water Susceptibility and LWT testing at the frequency listed in the Material Sampling Manual .
501.07 ROADWAY OPERATIONS. Meet the requirements of 502.07
except as modified herein .
501.07.1 Weather Limitations: Ensure that Thin Asphalt Concrete
complies with the weathe r limitations of 502.07.1 except that both the surface and ambient temp eratures shall be a minimum of 60°F. Do not place OGFC when ambient temperatures are predicted to drop below freezing, 32°F, within a 3 day forecast period by the U.S. National Weather Service (NWS).
501.07.2 Surface Preparation: Protect and cover manhole covers ,
drains, grates, catch basins and other such utility structures. Cut back all vegetation at the road edge. Sweep the surface clean of dust, dirt, caked clay, and loose foreign material. Remove and discard raised pavement markers prior to placement.
501.08 HAUL ING, PAVING AND FINI SHING. Meet the requirements
of 502.08 except as modified herein. Use fully sealed tarps on all loads. Load haul trucks to minimize segreg ation.
501.08.1 Application of Tack Coat: Before constructing the thin
lift, apply an approved asphalt tack coat in accordance with Section 504 . Spray the tack coat wit h a power asphalt distributor meeting the requirements of 503.13.1 or a spray paver meeting the requirements of
503.15.1 Spray tack co at uniformly and accurately across the paving
width and monitor the rate of spray. Determine the tack coat application rate by road conditions and mix type. Meet the undiluted asphalt emulsion application rate in Table 501 -1. Tack coat application rates above the minimum specified in Table 501 -1 must be approved by the Engineer.
501.08.2 Placement: Place mixtures in accordance with processes
and equipment described in Section 503 . Deliver material to the paver at a uniform rate and in an amount within the capacity of paving and compacting equipment. Adjust the paver speed and number of trucks to
1.Perform all acceptance and verification testing using the stratified random sampling approach in accordance with S605 of the Materials Sampling Manual.
2.Sample and test the mixture for Water Susceptibility and LWT testing at the frequency listed in the Material Sampling Manual .
501.07 ROADWAY OPERATIONS. Meet the requirements of 502.07
except as modified herein .
501.07.1 Weather Limitations: Ensure that Thin Asphalt Concrete
complies with the weathe r limitations of 502.07.1 except that both the surface and ambient temp eratures shall be a minimum of 60°F. Do not place OGFC when ambient temperatures are predicted to drop below freezing, 32°F, within a 3 day forecast period by the U.S. National Weather Service (NWS).
501.07.2 Surface Preparation: Protect and cover manhole covers ,
drains, grates, catch basins and other such utility structures. Cut back all vegetation at the road edge. Sweep the surface clean of dust, dirt, caked clay, and loose foreign material. Remove and discard raised pavement markers prior to placement.
501.08 HAUL ING, PAVING AND FINI SHING. Meet the requirements
of 502.08 except as modified herein. Use fully sealed tarps on all loads. Load haul trucks to minimize segreg ation.
501.08.1 Application of Tack Coat: Before constructing the thin
lift, apply an approved asphalt tack coat in accordance with Section 504 . Spray the tack coat wit h a power asphalt distributor meeting the requirements of 503.13.1 or a spray paver meeting the requirements of
503.15.1 Spray tack co at uniformly and accurately across the paving
width and monitor the rate of spray. Determine the tack coat application rate by road conditions and mix type. Meet the undiluted asphalt emulsion application rate in Table 501 -1. Tack coat application rates above the minimum specified in Table 501 -1 must be approved by the Engineer.
501.08.2 Placement: Place mixtures in accordance with processes
and equipment described in Section 503 . Deliver material to the paver at a uniform rate and in an amount within the capacity of paving and compacting equipment. Adjust the paver speed and number of trucks to
1.Perform all acceptance and verification testing using the stratified random sampling approach in accordance with S605 of the Materials Sampling Manual.
2.Sample and test the mixture for Water Susceptibility and LWT testing at the frequency listed in the Material Sampling Manual .
501.07 ROADWAY OPERATIONS. Meet the requirements of 502.07
except as modified herein .
501.07.1 Weather Limitations: Ensure that Thin Asphalt Concrete
complies with the weathe r limitations of 502.07.1 except that both the surface and ambient temp eratures shall be a minimum of 60°F. Do not place OGFC when ambient temperatures are predicted to drop below freezing, 32°F, within a 3 day forecast period by the U.S. National Weather Service (NWS).
501.07.2 Surface Preparation: Protect and cover manhole covers ,
drains, grates, catch basins and other such utility structures. Cut back all vegetation at the road edge. Sweep the surface clean of dust, dirt, caked clay, and loose foreign material. Remove and discard raised pavement markers prior to placement.
501.08 HAUL ING, PAVING AND FINI SHING. Meet the requirements
of 502.08 except as modified herein. Use fully sealed tarps on all loads. Load haul trucks to minimize segreg ation.
501.08.1 Application of Tack Coat: Before constructing the thin
lift, apply an approved asphalt tack coat in accordance with Section 504 . Spray the tack coat wit h a power asphalt distributor meeting the requirements of 503.13.1 or a spray paver meeting the requirements of
503.15.1 Spray tack co at uniformly and accurately across the paving
width and monitor the rate of spray. Determine the tack coat application rate by road conditions and mix type. Meet the undiluted asphalt emulsion application rate in Table 501 -1. Tack coat application rates above the minimum specified in Table 501 -1 must be approved by the Engineer.
501.08.2 Placement: Place mixtures in accordance with processes
and equipment described in Section 503 . Deliver material to the paver at a uniform rate and in an amount within the capacity of paving and compacting equipment. Adjust the paver speed and number of trucks to
1.Perform all acceptance and verification testing using the stratified random sampling approach in accordance with S605 of the Materials Sampling Manual.
2.Sample and test the mixture for Water Susceptibility and LWT testing at the frequency listed in the Material Sampling Manual .
501.07 ROADWAY OPERATIONS. Meet the requirements of 502.07
except as modified herein .
501.07.1 Weather Limitations: Ensure that Thin Asphalt Concrete
complies with the weathe r limitations of 502.07.1 except that both the surface and ambient temp eratures shall be a minimum of 60°F. Do not place OGFC when ambient temperatures are predicted to drop below freezing, 32°F, within a 3 day forecast period by the U.S. National Weather Service (NWS).
501.07.2 Surface Preparation: Protect and cover manhole covers ,
drains, grates, catch basins and other such utility structures. Cut back all vegetation at the road edge. Sweep the surface clean of dust, dirt, caked clay, and loose foreign material. Remove and discard raised pavement markers prior to placement.
501.08 HAUL ING, PAVING AND FINI SHING. Meet the requirements
of 502.08 except as modified herein. Use fully sealed tarps on all loads. Load haul trucks to minimize segreg ation.
501.08.1 Application of Tack Coat: Before constructing the thin
lift, apply an approved asphalt tack coat in accordance with Section 504 . Spray the tack coat wit h a power asphalt distributor meeting the requirements of 503.13.1 or a spray paver meeting the requirements of
503.15.1 Spray tack co at uniformly and accurately across the paving
width and monitor the rate of spray. Determine the tack coat application rate by road conditions and mix type. Meet the undiluted asphalt emulsion application rate in Table 501 -1. Tack coat application rates above the minimum specified in Table 501 -1 must be approved by the Engineer.
501.08.2 Placement: Place mixtures in accordance with processes
and equipment described in Section 503 . Deliver material to the paver at a uniform rate and in an amount within the capacity of paving and compacting equipment. Adjust the paver speed and number of trucks to
1.Perform all acceptance and verification testing using the stratified random sampling approach in accordance with S605 of the Materials Sampling Manual.
2.Sample and test the mixture for Water Susceptibility and LWT testing at the frequency listed in the Material Sampling Manual .
501.07 ROADWAY OPERATIONS. Meet the requirements of 502.07
except as modified herein .
501.07.1 Weather Limitations: Ensure that Thin Asphalt Concrete
complies with the weathe r limitations of 502.07.1 except that both the surface and ambient temp eratures shall be a minimum of 60°F. Do not place OGFC when ambient temperatures are predicted to drop below freezing, 32°F, within a 3 day forecast period by the U.S. National Weather Service (NWS).
501.07.2 Surface Preparation: Protect and cover manhole covers ,
drains, grates, catch basins and other such utility structures. Cut back all vegetation at the road edge. Sweep the surface clean of dust, dirt, caked clay, and loose foreign material. Remove and discard raised pavement markers prior to placement.
501.08 HAUL ING, PAVING AND FINI SHING. Meet the requirements
of 502.08 except as modified herein. Use fully sealed tarps on all loads. Load haul trucks to minimize segreg ation.
501.08.1 Application of Tack Coat: Before constructing the thin
lift, apply an approved asphalt tack coat in accordance with Section 504 . Spray the tack coat wit h a power asphalt distributor meeting the requirements of 503.13.1 or a spray paver meeting the requirements of
503.15.1 Spray tack co at uniformly and accurately across the paving
width and monitor the rate of spray. Determine the tack coat application rate by road conditions and mix type. Meet the undiluted asphalt emulsion application rate in Table 501 -1. Tack coat application rates above the minimum specified in Table 501 -1 must be approved by the Engineer.
501.08.2 Placement: Place mixtures in accordance with processes
and equipment described in Section 503 . Deliver material to the paver at a uniform rate and in an amount within the capacity of paving and compacting equipment. Adjust the paver speed and number of trucks to
1.Perform all acceptance and verification testing using the stratified random sampling approach in accordance with S605 of the Materials Sampling Manual.
2.Sample and test the mixture for Water Susceptibility and LWT testing at the frequency listed in the Material Sampling Manual .
501.07 ROADWAY OPERATIONS. Meet the requirements of 502.07
except as modified herein .
501.07.1 Weather Limitations: Ensure that Thin Asphalt Concrete
complies with the weathe r limitations of 502.07.1 except that both the surface and ambient temp eratures shall be a minimum of 60°F. Do not place OGFC when ambient temperatures are predicted to drop below freezing, 32°F, within a 3 day forecast period by the U.S. National Weather Service (NWS).
501.07.2 Surface Preparation: Protect and cover manhole covers ,
drains, grates, catch basins and other such utility structures. Cut back all vegetation at the road edge. Sweep the surface clean of dust, dirt, caked clay, and loose foreign material. Remove and discard raised pavement markers prior to placement.
501.08 HAUL ING, PAVING AND FINI SHING. Meet the requirements
of 502.08 except as modified herein. Use fully sealed tarps on all loads. Load haul trucks to minimize segreg ation.
501.08.1 Application of Tack Coat: Before constructing the thin
lift, apply an approved asphalt tack coat in accordance with Section 504 . Spray the tack coat wit h a power asphalt distributor meeting the requirements of 503.13.1 or a spray paver meeting the requirements of
503.15.1 Spray tack co at uniformly and accurately across the paving
width and monitor the rate of spray. Determine the tack coat application rate by road conditions and mix type. Meet the undiluted asphalt emulsion application rate in Table 501 -1. Tack coat application rates above the minimum specified in Table 501 -1 must be approved by the Engineer.
501.08.2 Placement: Place mixtures in accordance with processes
and equipment described in Section 503 . Deliver material to the paver at a uniform rate and in an amount within the capacity of paving and compacting equipment. Adjust the paver speed and number of trucks to
1.Perform all acceptance and verification testing using the stratified random sampling approach in accordance with S605 of the Materials Sampling Manual.
2.Sample and test the mixture for Water Susceptibility and LWT testing at the frequency listed in the Material Sampling Manual .
501.07 ROADWAY OPERATIONS. Meet the requirements of 502.07
except as modified herein .
501.07.1 Weather Limitations: Ensure that Thin Asphalt Concrete
complies with the weathe r limitations of 502.07.1 except that both the surface and ambient temp eratures shall be a minimum of 60°F. Do not place OGFC when ambient temperatures are predicted to drop below freezing, 32°F, within a 3 day forecast period by the U.S. National Weather Service (NWS).
501.07.2 Surface Preparation: Protect and cover manhole covers ,
drains, grates, catch basins and other such utility structures. Cut back all vegetation at the road edge. Sweep the surface clean of dust, dirt, caked clay, and loose foreign material. Remove and discard raised pavement markers prior to placement.
501.08 HAUL ING, PAVING AND FINI SHING. Meet the requirements
of 502.08 except as modified herein. Use fully sealed tarps on all loads. Load haul trucks to minimize segreg ation.
501.08.1 Application of Tack Coat: Before constructing the thin
lift, apply an approved asphalt tack coat in accordance with Section 504 . Spray the tack coat wit h a power asphalt distributor meeting the requirements of 503.13.1 or a spray paver meeting the requirements of
503.15.1 Spray tack co at uniformly and accurately across the paving
width and monitor the rate of spray. Determine the tack coat application rate by road conditions and mix type. Meet the undiluted asphalt emulsion application rate in Table 501 -1. Tack coat application rates above the minimum specified in Table 501 -1 must be approved by the Engineer.
501.08.2 Placement: Place mixtures in accordance with processes
and equipment described in Section 503 . Deliver material to the paver at a uniform rate and in an amount within the capacity of paving and compacting equipment. Adjust the paver speed and number of trucks to maintain continuous paving operations. Keep the height of material in front of the screed at a uniform height. Ensure the pavers are designed and operated to place mixtures to required line, grade and surface tolerance without resorting to hand finishing.
501.08.3 Paving: Place and compact the mixture to plan thickness.
Place a smoot h uniform mat over the full lane width.
501.08.4 Compaction: Comply with 502.09 except as modified
herein. Compact the mixture applying a minimum of 3 passes over a sin gle point on the road using a double drum steel wheel roller of sufficient weight to properly seat the aggregate without crushing. Roll longitudinal joints directly behind the paving machine. Do not vibrate except at transverse joints. Accomplish final compaction with a second roller. Compact and finish before the mixture temperature falls below 180°F.
501.09 ROADWAY QUALITY ASSU RANCE. The Department will
perform all plant acceptance and verification testing to meet the Materials Sampling Manual. The Proje ct Engineer will verify that the tack coat application rate and mixture yield meet the requirements of Table 501 -1. Do not place asphalt concrete exhibiting deficiencies before placement such as segregation, contamination, lumps, non -uniform coating, excessive temperature variations, alignment deviations, variations in surface temperature or other deficiencies, apparent on visual inspection. Poor construction practices such as handwork, improper truck exchanges, improper joint construction, or other de ficiencies, apparent on visual inspection, will not be accepted.
501.09.1 Opening to Traffic: Do not open the new pavement to
traffic or allow any roller to sit idle on the pavement until the rolling operation is complete and the material has cooled to a tempera ture where the mat will not be damaged by traffic.
501.09.2 Smoothness: Measure the International Roughness Index
(IRI) using a Department approved automated profiler before and after laydown operations in the presence of a Project Engineer’s representative. Measure IRI in accordance with DOTD TR644, on the travel lanes for highways and the center two lanes for airports before placement and meet Table 502 -5 requirements. Ensure a maximum transverse deviation of 1/8 inch due to roller marks and 1/4 inch maximum deviation for longitudinal joint differences. maintain continuous paving operations. Keep the height of material in front of the screed at a uniform height. Ensure the pavers are designed and operated to place mixtures to required line, grade and surface tolerance without resorting to hand finishing.
501.08.3 Paving: Place and compact the mixture to plan thickness.
Place a smoot h uniform mat over the full lane width.
501.08.4 Compaction: Comply with 502.09 except as modified
herein. Compact the mixture applying a minimum of 3 passes over a sin gle point on the road using a double drum steel wheel roller of sufficient weight to properly seat the aggregate without crushing. Roll longitudinal joints directly behind the paving machine. Do not vibrate except at transverse joints. Accomplish final compaction with a second roller. Compact and finish before the mixture temperature falls below 180°F.
501.09 ROADWAY QUALITY ASSU RANCE. The Department will
perform all plant acceptance and verification testing to meet the Materials Sampling Manual. The Proje ct Engineer will verify that the tack coat application rate and mixture yield meet the requirements of Table 501 -1. Do not place asphalt concrete exhibiting deficiencies before placement such as segregation, contamination, lumps, non -uniform coating, excessive temperature variations, alignment deviations, variations in surface temperature or other deficiencies, apparent on visual inspection. Poor construction practices such as handwork, improper truck exchanges, improper joint construction, or other de ficiencies, apparent on visual inspection, will not be accepted.
501.09.1 Opening to Traffic: Do not open the new pavement to
traffic or allow any roller to sit idle on the pavement until the rolling operation is complete and the material has cooled to a tempera ture where the mat will not be damaged by traffic.
501.09.2 Smoothness: Measure the International Roughness Index
(IRI) using a Department approved automated profiler before and after laydown operations in the presence of a Project Engineer’s representative. Measure IRI in accordance with DOTD TR644, on the travel lanes for highways and the center two lanes for airports before placement and meet Table 502 -5 requirements. Ensure a maximum transverse deviation of 1/8 inch due to roller marks and 1/4 inch maximum deviation for longitudinal joint differences. maintain continuous paving operations. Keep the height of material in front of the screed at a uniform height. Ensure the pavers are designed and operated to place mixtures to required line, grade and surface tolerance without resorting to hand finishing.
501.08.3 Paving: Place and compact the mixture to plan thickness.
Place a smoot h uniform mat over the full lane width.
501.08.4 Compaction: Comply with 502.09 except as modified
herein. Compact the mixture applying a minimum of 3 passes over a sin gle point on the road using a double drum steel wheel roller of sufficient weight to properly seat the aggregate without crushing. Roll longitudinal joints directly behind the paving machine. Do not vibrate except at transverse joints. Accomplish final compaction with a second roller. Compact and finish before the mixture temperature falls below 180°F.
501.09 ROADWAY QUALITY ASSU RANCE. The Department will
perform all plant acceptance and verification testing to meet the Materials Sampling Manual. The Proje ct Engineer will verify that the tack coat application rate and mixture yield meet the requirements of Table 501 -1. Do not place asphalt concrete exhibiting deficiencies before placement such as segregation, contamination, lumps, non -uniform coating, excessive temperature variations, alignment deviations, variations in surface temperature or other deficiencies, apparent on visual inspection. Poor construction practices such as handwork, improper truck exchanges, improper joint construction, or other de ficiencies, apparent on visual inspection, will not be accepted.
501.09.1 Opening to Traffic: Do not open the new pavement to
traffic or allow any roller to sit idle on the pavement until the rolling operation is complete and the material has cooled to a tempera ture where the mat will not be damaged by traffic.
501.09.2 Smoothness: Measure the International Roughness Index
(IRI) using a Department approved automated profiler before and after laydown operations in the presence of a Project Engineer’s representative. Measure IRI in accordance with DOTD TR644, on the travel lanes for highways and the center two lanes for airports before placement and meet Table 502 -5 requirements. Ensure a maximum transverse deviation of 1/8 inch due to roller marks and 1/4 inch maximum deviation for longitudinal joint differences. maintain continuous paving operations. Keep the height of material in front of the screed at a uniform height. Ensure the pavers are designed and operated to place mixtures to required line, grade and surface tolerance without resorting to hand finishing.
501.08.3 Paving: Place and compact the mixture to plan thickness.
Place a smoot h uniform mat over the full lane width.
501.08.4 Compaction: Comply with 502.09 except as modified
herein. Compact the mixture applying a minimum of 3 passes over a sin gle point on the road using a double drum steel wheel roller of sufficient weight to properly seat the aggregate without crushing. Roll longitudinal joints directly behind the paving machine. Do not vibrate except at transverse joints. Accomplish final compaction with a second roller. Compact and finish before the mixture temperature falls below 180°F.
501.09 ROADWAY QUALITY ASSU RANCE. The Department will
perform all plant acceptance and verification testing to meet the Materials Sampling Manual. The Proje ct Engineer will verify that the tack coat application rate and mixture yield meet the requirements of Table 501 -1. Do not place asphalt concrete exhibiting deficiencies before placement such as segregation, contamination, lumps, non -uniform coating, excessive temperature variations, alignment deviations, variations in surface temperature or other deficiencies, apparent on visual inspection. Poor construction practices such as handwork, improper truck exchanges, improper joint construction, or other de ficiencies, apparent on visual inspection, will not be accepted.
501.09.1 Opening to Traffic: Do not open the new pavement to
traffic or allow any roller to sit idle on the pavement until the rolling operation is complete and the material has cooled to a tempera ture where the mat will not be damaged by traffic.
501.09.2 Smoothness: Measure the International Roughness Index
(IRI) using a Department approved automated profiler before and after laydown operations in the presence of a Project Engineer’s representative. Measure IRI in accordance with DOTD TR644, on the travel lanes for highways and the center two lanes for airports before placement and meet Table 502 -5 requirements. Ensure a maximum transverse deviation of 1/8 inch due to roller marks and 1/4 inch maximum deviation for longitudinal joint differences. maintain continuous paving operations. Keep the height of material in front of the screed at a uniform height. Ensure the pavers are designed and operated to place mixtures to required line, grade and surface tolerance without resorting to hand finishing.
501.08.3 Paving: Place and compact the mixture to plan thickness.
Place a smoot h uniform mat over the full lane width.
501.08.4 Compaction: Comply with 502.09 except as modified
herein. Compact the mixture applying a minimum of 3 passes over a sin gle point on the road using a double drum steel wheel roller of sufficient weight to properly seat the aggregate without crushing. Roll longitudinal joints directly behind the paving machine. Do not vibrate except at transverse joints. Accomplish final compaction with a second roller. Compact and finish before the mixture temperature falls below 180°F.
501.09 ROADWAY QUALITY ASSU RANCE. The Department will
perform all plant acceptance and verification testing to meet the Materials Sampling Manual. The Proje ct Engineer will verify that the tack coat application rate and mixture yield meet the requirements of Table 501 -1. Do not place asphalt concrete exhibiting deficiencies before placement such as segregation, contamination, lumps, non -uniform coating, excessive temperature variations, alignment deviations, variations in surface temperature or other deficiencies, apparent on visual inspection. Poor construction practices such as handwork, improper truck exchanges, improper joint construction, or other de ficiencies, apparent on visual inspection, will not be accepted.
501.09.1 Opening to Traffic: Do not open the new pavement to
traffic or allow any roller to sit idle on the pavement until the rolling operation is complete and the material has cooled to a tempera ture where the mat will not be damaged by traffic.
501.09.2 Smoothness: Measure the International Roughness Index
(IRI) using a Department approved automated profiler before and after laydown operations in the presence of a Project Engineer’s representative. Measure IRI in accordance with DOTD TR644, on the travel lanes for highways and the center two lanes for airports before placement and meet Table 502 -5 requirements. Ensure a maximum transverse deviation of 1/8 inch due to roller marks and 1/4 inch maximum deviation for longitudinal joint differences. maintain continuous paving operations. Keep the height of material in front of the screed at a uniform height. Ensure the pavers are designed and operated to place mixtures to required line, grade and surface tolerance without resorting to hand finishing.
501.08.3 Paving: Place and compact the mixture to plan thickness.
Place a smoot h uniform mat over the full lane width.
501.08.4 Compaction: Comply with 502.09 except as modified
herein. Compact the mixture applying a minimum of 3 passes over a sin gle point on the road using a double drum steel wheel roller of sufficient weight to properly seat the aggregate without crushing. Roll longitudinal joints directly behind the paving machine. Do not vibrate except at transverse joints. Accomplish final compaction with a second roller. Compact and finish before the mixture temperature falls below 180°F.
501.09 ROADWAY QUALITY ASSU RANCE. The Department will
perform all plant acceptance and verification testing to meet the Materials Sampling Manual. The Proje ct Engineer will verify that the tack coat application rate and mixture yield meet the requirements of Table 501 -1. Do not place asphalt concrete exhibiting deficiencies before placement such as segregation, contamination, lumps, non -uniform coating, excessive temperature variations, alignment deviations, variations in surface temperature or other deficiencies, apparent on visual inspection. Poor construction practices such as handwork, improper truck exchanges, improper joint construction, or other de ficiencies, apparent on visual inspection, will not be accepted.
501.09.1 Opening to Traffic: Do not open the new pavement to
traffic or allow any roller to sit idle on the pavement until the rolling operation is complete and the material has cooled to a tempera ture where the mat will not be damaged by traffic.
501.09.2 Smoothness: Measure the International Roughness Index
(IRI) using a Department approved automated profiler before and after laydown operations in the presence of a Project Engineer’s representative. Measure IRI in accordance with DOTD TR644, on the travel lanes for highways and the center two lanes for airports before placement and meet Table 502 -5 requirements. Ensure a maximum transverse deviation of 1/8 inch due to roller marks and 1/4 inch maximum deviation for longitudinal joint differences. Submit initial and final measurements to the engineer on a USB data storage device.
501.10 MEASUREMENT. Measure the Thin Asphalt Concrete
applications by the ton. Measure the tack coat in accordance with Section 504.
501.11 PAYMENT. Payment for Thin Asphalt Concrete mixture will be
made at the contract unit price per ton which includes furnishing all required materials, labor, equipment, tools and incidentals necessary for producing the mixtures, preparing the surfaces on which the mixtures are to be placed, hauling the mixtures to the work site, and placing and compacting the mixtures. Asphalt tack coat will not be a p ay item and will be considered incidental to the 501 item. However, if the engineer adjusts the application rate of tack coat from that specified by the contract document, payment for the asphalt mixture will be increased or decreased based on the differe nce in the applied quantity of asphalt emulsion shown on paid invoices (total of charges). The contractor shall provide copies of paid invoices for this determination. Apply 95 percent payment to the 501 item when the tack coat rates do not meet the appl ication rate as allowed by the engineer. Payment will be subject to the payment adjustment schedules as shown in Table 501 -5. Payment adjustments will be assessed on a per lot basis. The percent payment for the roadway lot will be the lowest value of t he payment adjustment parameters. Adjustment for smoothness will be per travel lane for the entire project in accordance with Table 501 -6. Payment for removal of pavement markings shall be in accordance with applicable item. Payment will be made at the co ntract unit price under: Item No . Pay Item Pay Unit 501-01 Thin Asphalt Concrete (Dense Mix) Ton 501-02 Thin Asphalt Concrete (Coarse Mix) Ton 501-03 Thin Asphalt Concrete (OGFC) Ton Submit initial and final measurements to the engineer on a USB data storage device.
501.10 MEASUREMENT. Measure the Thin Asphalt Concrete
applications by the ton. Measure the tack coat in accordance with Section 504.
501.11 PAYMENT. Payment for Thin Asphalt Concrete mixture will be
made at the contract unit price per ton which includes furnishing all required materials, labor, equipment, tools and incidentals necessary for producing the mixtures, preparing the surfaces on which the mixtures are to be placed, hauling the mixtures to the work site, and placing and compacting the mixtures. Asphalt tack coat will not be a p ay item and will be considered incidental to the 501 item. However, if the engineer adjusts the application rate of tack coat from that specified by the contract document, payment for the asphalt mixture will be increased or decreased based on the differe nce in the applied quantity of asphalt emulsion shown on paid invoices (total of charges). The contractor shall provide copies of paid invoices for this determination. Apply 95 percent payment to the 501 item when the tack coat rates do not meet the appl ication rate as allowed by the engineer. Payment will be subject to the payment adjustment schedules as shown in Table 501 -5. Payment adjustments will be assessed on a per lot basis. The percent payment for the roadway lot will be the lowest value of t he payment adjustment parameters. Adjustment for smoothness will be per travel lane for the entire project in accordance with Table 501 -6. Payment for removal of pavement markings shall be in accordance with applicable item. Payment will be made at the co ntract unit price under: Item No . Pay Item Pay Unit 501-01 Thin Asphalt Concrete (Dense Mix) Ton 501-02 Thin Asphalt Concrete (Coarse Mix) Ton 501-03 Thin Asphalt Concrete (OGFC) Ton Submit initial and final measurements to the engineer on a USB data storage device.
501.10 MEASUREMENT. Measure the Thin Asphalt Concrete
applications by the ton. Measure the tack coat in accordance with Section 504.
501.11 PAYMENT. Payment for Thin Asphalt Concrete mixture will be
made at the contract unit price per ton which includes furnishing all required materials, labor, equipment, tools and incidentals necessary for producing the mixtures, preparing the surfaces on which the mixtures are to be placed, hauling the mixtures to the work site, and placing and compacting the mixtures. Asphalt tack coat will not be a p ay item and will be considered incidental to the 501 item. However, if the engineer adjusts the application rate of tack coat from that specified by the contract document, payment for the asphalt mixture will be increased or decreased based on the differe nce in the applied quantity of asphalt emulsion shown on paid invoices (total of charges). The contractor shall provide copies of paid invoices for this determination. Apply 95 percent payment to the 501 item when the tack coat rates do not meet the appl ication rate as allowed by the engineer. Payment will be subject to the payment adjustment schedules as shown in Table 501 -5. Payment adjustments will be assessed on a per lot basis. The percent payment for the roadway lot will be the lowest value of t he payment adjustment parameters. Adjustment for smoothness will be per travel lane for the entire project in accordance with Table 501 -6. Payment for removal of pavement markings shall be in accordance with applicable item. Payment will be made at the co ntract unit price under: Item No . Pay Item Pay Unit 501-01 Thin Asphalt Concrete (Dense Mix) Ton 501-02 Thin Asphalt Concrete (Coarse Mix) Ton 501-03 Thin Asphalt Concrete (OGFC) Ton Table 501-1 Asphalt Mix Design Requirements Mix Type Dense Mix Coarse Mix OGFC Asphalt Cement Grade PG 67 -22 PG 70 - 22m PG 76 -22m Gyratory Revolutions 1 50 75 50 Minimum AC content, % 4.5 4.5 6.5 Air Voids, % 2 4-6 6-83 18-243 Sands, Max. % 15 04 0 RAP, Max % 10 0 0 LWT rut depth, 12 mm (max) @ no. passes, AASHTO T 3244 12,000 20,000 5000 Draindown, % max 5 --- 0.15 0.30 Water Susceptibility, Boil Test, DOTD TR 317, % min 90 90 90 Min.Tack Coat Application Rate, Undiluted gal/sq.yd. (0.40 gal/sq.yd maximum) 6 0.088 0.15 0.15 1Compact specimen according to AASHTO T 312. 2Design target voids at mid -point of void requirement. Full range allowed for OGFC. 3As computed using the measure of the physical volume (weight of compacted specimen)/ (height of compacted specimen x area of the compacted specimen). 4 Compact LWT specimen to the target voids. 5As measured in accordance with ASTM D 6390. 6See 501.02.1 for allowable tack coats. 7If bleeding, ponding or slipping are evident, these rates may be reduced to a minimum of 0.04 gallon/square yard with a minimum 0.02 gallon/square yard residual wi th approval of the engineer. Table 501 -2 Aggregate Physical Properties Test Method Coarse Mix and OGFC Dense Mix 1 Coarse Aggregate: Micro Deval, % loss max AASHTO T - 327 18 — Flat and Elongated Ratio; 3:1, % Max. ASTM D4791 25 — Coarse Aggregate Angularity, % Crushed, Double Faced, Min. DOTD TR 306 90 — 1 Fine Aggregate: 2 Sand Equivalent, Min. DOTD TR 120 60 40 Fine Aggregate Angularity (FAA), Min. DOTD TR 121 453 354 Friction Rating I, II5 I, II, III 1Applies to individual coarse aggregates having more than 10 percent retained on No. 4 sieve and to individual fine aggregates having more than 10 percent passing the No. 4 sieve. 2If sand equivalent test fails, the Methylene Blue Test in accordance with AASHTO TP 57-99 will be requi red with a specification maximum of 10. 3Use as -received material and test using AASHTO T -304, Method C, when quantity of material retained on individual sieve sizes do not meet the requirements. 4FAA of 45 for gravel calculated on the composite blend 5See Table 502 -3. Table 501 -3 JMF Extracted Gradation and Production Tolerances
U.S. (Metric) Sieve % Passing Dense Mix Coarse Mix OGFC Production Tolerances 3/4 inch 100 100 100 ±4 1/2 inch 100 75-100 85-100 ±4 3/8 inch 90– 100 — 55-75 ±4 No. 4 — 25-40 10-25 ±4 No. 8 35-70 19-28 5-13 ±3 No. 16 20-50 — — ±2 No. 30 — — — ±2 No. 50 — — — ±2 No. 200 2-10 2.0-5.5 2-4 ±1.5 Metered A/C, % ±0.1 Mix Temperature, ⁰F ±25 Gmm All Mixes 0.015 1Job Mix Formula (JMF) target based on validated mix design. For OGFC and Coarse Mix, the tolerance will not be allowed above the maximum limits of the No. 200 sieve. Table 501-4 Quality Control and Production Tolerances Property Tolerance1 Fine Aggregate Specific Gravity, G sb ±0.030 Coarse Aggregate Specific Gravity, G sb ±0.020 Theoretical Maximum Specific Gravity, G mm ±0.015 Air Voids, V a, % ±1 # 4 Sieve, % passing ±4 #200 Sieve, % passing ±1.5 1Meet these specifications for all parameters where tolerances are not listed. Table 501-5¹ Payment Adjustment Schedules Plant: Percent of Contract Unit Price per Lot 100% 90% 80% 501% Theoretical Maximum Specific Gravity (Gmm) Average Deviation from Validated JMF Target Value Less than 0.022 0.022 - 0.025 0.025 - .027 > 0.027 Limits on Extracted Aggregate, Average Deviation from Table 501 - 3, JMF Validated Target² No. 4 Sieve ≤ 5.0 5.1 – 6.0 > 6.0 - 7.0 > 7.0 No. 200 Sieve ≤ 2.0 2.1 – 2.5 > 2.5 - 3.0 > 3.0 Roadway: Tack Coat Rate (applied undiluted) with a spray paver , gallon/sq. yd. Coarse Mix and OGFC 0.15 (min.) 0.14- 0.08 0.08- 0.04 < 0.04 ¹Reduced pay or reapplication at the contractor expense shall be as directed by the Chief Engineer. ²Gradation pay schedule applies to coarse and OGFC mixtures only. Table 501 -6 Smoothness Payment Adjustment Schedules Percent of Contract Unit Price per Travel Lane 100% 90% 50%1 Initial IRI of ≤ 65 ≤ 65 66-75 > 75 Initial IRI > 65 to 81 ≤ 65 IRI 0-10% Higher IRI number than initial measure > 10% Higher IRI Number than initial measure Initial IRI > 81 20% Improvement of initial measure 19% improvement to equal to initial measure. Higher IRI Number than initial measure 1 50% pay or reapplication at no direct pay shall be as directed by the Chief Engineer. Section 502 Asphalt Concrete Mixtures
502.01 Description.
502.01.1 General: Furnish and construct asphalt concrete mixtures
in accordance with Table 502 -6 and in conformance with the lines, grades, thicknesses, and typical sections in the plans. Comply with Section 503 , Equipment and Processes and the Application of Quality Assurance Specifications for Asphalt Concrete Mixtures (QA Manual). Use a DOTD certified laboratory accredited by AMRL, CMEC, or other accreditation agency approved by DOTD.
502.01.2 Lift Description and Mixture Types: The wearing
course is defined as the final lift placed. The binder course is defined as the lift placed prior to the final lift as defined in the plans. When a Section 501 thin lift mix is used in conjunction with construction of 502 mixtures, it is a finish course. Mainline mixtures include wearing, binder and base cour ses for travel lane, ramps greater than 300 feet, interstate acceleration/deceleration lanes, turn lanes, and the two center lanes for airports. Minor mixes include mixture used for bike paths, crossovers, curbs, detour roads, driveways, guardrail widenin g, islands, joint repair, leveling, medians, parking lots, shoulders, turnouts, ramps less than or equal to 300 feet, patching, widening, miscellaneous handwork, and any other mixture that is not mainline.
502.02 MATERIALS. Comply with applicable Part X subsec tions listed
herein. Sample in accordance with the Materials Sampling Manual and ensure testing in accordance with the procedures listed in Part X and Table 502-1. Keep accurate records, including proof of deliveries of all materials used in asphalt conc rete mixtures. Furnish copies of these records to the engineer upon request.
Source: Louisiana Standard Specifications for Roads and Bridges, 2016 Edition. Pages 248–260 of 1,145.