DESCRIPTION
486.10: General
This work shall consist of producing and placing Ultrathin Bonded Overlay (UTBO) as a pavement surface preservation treatment. The UTBO pavement shall be constructed on the prepared or existing base in conformance with the lines, grades, compacted thickness and typical cross section in accordance with the plans and these specifications. The UTBO pavement course shall be comprised of one of the mixture types listed in Table 486.10 -1. Table 486.10- 1 - UTBO Pavement Mixture Types Pavement Course Mixture Type Mixture Designation Surface Preservation Treatment Ultrathin Bonded Overlay - Type 1 - Polymer UTBO -1-P Ultrathin Bonded Overlay - Type 2 - Polymer UTBO -2-P Ultrathin Bonded Overlay - Type 3 - Polymer UTBO -3-P Ultrathin Bonded Overlay - Type 2 - Asphalt Rubber UTBO -2-AR Ultrathin Bonded Overlay - Type 3 - Asphalt Rubber UTBO -3-AR
486.20: Quality Assurance
Quality Assurance shall conform to the requirements of 450.20: Quality Assurance. II.276 202 4 Edition MATERIALS
486.30: General
Materials shall meet the requirements in the following Subsections of Division III, Materials and as otherwise specified herein: Modified Asphalt Binder Grades ........................................................................................... M3.01.2 Polymer Modified Emulsified Asphalt for Bond Coat ................................................... M3.03.3 Warm Mix Asphalt ....................................................................................................................... M3.04.1 Asphalt Release Agents ............................................................................................................. M3.04.2 Ultrathin Bonded Overlay ........................................................................................................ M3.10.5 Hot Mix Asphalt Production Facility .................................................................................... M3.12.0 Contractor Quality Control Laboratory .............................................................................. M3.13.1 Department Acceptance Laboratory ................................................................................... M3.13.2
486.32: UTBO Mix Design
UTBO mixtures shall be composed of the following: Mineral aggregate, mineral filler (if required), and Performance Graded Asphalt Binder (PGAB) as specified in 486.30: General. The Contractor shall be responsible for development of a Laboratory Trial Mix Formula (LTMF) for each UTBO mixture type specified for the contract in accordance with the requirements of 486.30: General. CONSTRUCTION PROCEDURES
486.40: General
Prior to the start of any work activity addressed in 486.43: Preparation of Underlying Surface thru
486.52: Opening to Traffic below, a Construction Quality Meeting shall be held to review the
Contractor’s Quality Control system . The Contractor shall present and discuss with the Engineer in sufficient detail the specific Quality Control information and activities contained in each section of their QC Plan as outlined in 450.61: Contractor Quality Control Plan. The meeting is intended to ensure that the Contractor has an adequate Quality Control system in place and that the Contractor’s personnel are fully knowledgeable of the roles and activities for which they are responsible to achieve the specified level of q uality . Contractor personnel required to attend the Construction Quality Meeting include the Construction Quality Control Manager (QC Manager) and all Superintendents . The Contractor shall provide a copy of the approved QC Plan for each Contractor and Department attendee of the meeting.
486.41: Control of Grade and Cross -Section
Control of grade and cross -section shall conform to the requirements of 450.41: Control of Grade and Cross -Section .
486.42: Weather Limitations
Weather conditions shall conform to the requirements of 450.42: Weather Limitations and Table
1. Regardless of any temperature requirements, UTBO mixtures shall not be placed after
October 31 or before May 1 without the written permission of the Engineer. II.277 202 4 Edition Table 486.42- 1: Temperature Limitations for UTBO Placement HMA Pavement Course Lift Thickness (in.) Minimum Air Temperature (°F) Minimum Surface Temperature (°F) Surface Preservation Treatment ≤ 1 50 55
486.43: Preparation of Underlying Surface
The preparation of the underlying pavement surface shall conform to the requirements of 450.43: Preparation of Underlying Surface and the following.
Crack sealing, when specified, shall conform to the requirements of Subsection 480: Pavement Crack Sealing.
A polymer modified bond coat of asphalt emulsion, meeting the requirements of 486.30: General shall be uniformly applied to existing or new pavement surfaces prior to placing the UTBO as specified below . The existing surface shall be swept clean of all foreign matter and loose material using a mechanical sweeper and shall be dry before the bond coat is applied.
A self -priming paver, manufactured for paver -placed surface treatments, shall be used to apply the bond coat. The bond coat distributor system shall be equipped with the following to control and monitor the application: • System for heating the asphalt emulsion uniformly to specified temperature. • The paver emulsion tank shall have a 1,500 gallon capacity. • Thermometer for measuring the asphalt emulsion temperature. • Adjustable full circulation spray bar, configured to cover the entire paving width, including behind paver tracks. • Positive controls including tachometer, pressure gauge, volume measuring device, and ground speed controls to regulate bond coat application rate. • The spray bar shall be adjusted so that it is at the proper height above the pavement surface to provide a uniform coverage of the pavement surface. • All nozzles on the distributor spray bar shall be open and functioning . All nozzles shall be turned at the same angle to the spray bar . The nozzles shall be offset at an angle from the spray bar to prevent the fan from one nozzle from interfering with the fan from another . Proper nozzle angle shall be as determined by the Manufacturer of the distributor spray bar. At least once every 12 months the application rate of the bond coat distributor system shall be calibrated by the Contractor using the appropriate spray bar nozzle size(s) . The calibration shall be in the transverse and longitudinal directions following ASTM D2995 . The calibration shall address the spray bar height, nozzle angle, spray bar pressure, thermometers, and strapping stick . Documentation of the annual calibration shall be kept with the bond coat distributor system and shall be provided to the Engi neer when requested. II.278 202 4 Edition
Bond coat application shall be in accordance with the following:
gallons per square yard . The target application rate shall be within this range and established in the QC Plan . The target application rate may be adjusted based on field conditions encountered when agreed upon by the Contractor and Engineer.
cover a minimum of 95% of the pavement surface. In addition to the requirements above, all vertical surfaces of curbs, edging, utilities, and drainage structures that will be abutted by new pavement shall receive a thorough bond coat application immediately prior to placing the UTBO pavement course.
The asphalt emulsion temperature and application rate shall be periodically measured and properly recorded by the Contractor on NETTCP Inspection Report Forms . If the temperature or application rate is determined to not be in conformance with the specification requirements above, the Contractor shall make appropriate adjustments to the bond coat application operations.
486.44: Zero Tolerance for Use of Petroleum Products as Release Agents
The use of petroleum -based products as release agents shall not be permitted in accordance with
450.44: Zero Tolerance for Use of Petroleum Products as Release Agents
486.45: UTBO Production
UTBO production shall conform to the requirements of 486.30: General.
486.46: UTBO Transportation and Delivery
UTBO shall be transported and delivered to the project in accordance with 450.46: Hot Mix Asphalt Transportation and Delivery .
486.47: UTBO Placement
UTB O placement shall conform to the requirements of 450.47: Hot Mix Asphalt Placement and the following.
A Material transfer vehicle shall be required for all UTBO placements and shall conform to the requirements of 450.47: Hot Mix Asphalt Placement , Part A.
Pavers shall conform to the requirements of 450.47: Hot Mix Asphalt Placement , Part B and the following: II.279 202 4 Edition The self -priming paver must be capable of spraying the bond coat and placing the UTBO mixture in one pass . The self -priming paver must incorporate a receiving hopper, feed conveyor, insulated storage tank for emulsion, metered bond coat spray bar and a variable width, heated screed . The metered bond coat spray bar must adjust automatically to the full width of the screed . The screed must have the ability to be crowned at the center both positively and negatively and have vertically adjustable extensions to accommodate the desired pavement profile.
486.48: UTBO Compaction
Compaction of the UTBO pavement shall conform to the requirements of 450.48: Hot Mix Asphalt Compaction and the following . Compaction shall begin immediately after the placement and shall consist of a minimum of 2 passes with an adequate number of rollers to complete compaction before the pavement temperature falls below 185 ℉. The UTBO mixture shall be protected from traffic until the rolling operation is complete and the material has cooled sufficiently to resist damage.
486.49: UTBO Joints
Construction of the UTBO joints shall conform to the requirements of 450.49: Hot Mix Asphalt Joints .
486.51: UTBO Mix Design Verification and Control Strip Requirements
The UTBO mix design shall be verified and a Control Strip placed in accordance with 450.51: HMA Mix Design Verification and Control Strip Requirements and the following.
The Contractor shall develop and submit a Laboratory Trial Mix Formula (LTMF) for each UTBO mixture type, which is to be proposed as a Job Mix Formula, a minimum of 60 days prior to the start of UTBO production in accordance with the requirements of 486.30: General and MassDOT’s Asphalt Mix Design approval process . The Contractor shall not proceed to UTBO production for the Control Strip as outlined below until the LTMF is verified by the Department.
A UTBO Control Strip shall be placed in accordance with 450.51: HMA Mix Design Verification and Control Strip Requirements , Part B and shall consist of a minimum of 600 tons of UTBO but not more than 1,200 tons . The Control Strip shall meet the requirements of 450.51: HMA Mix Design Verification and Control Strip Requirements , Part B and the following.
The Contractor and the Department shall independently sample and test the Control Strip Lot for the Quality Characteristics identified in Table 486.51 -1. The Contractor and the Department shall independently sample and test each Sublot produced and placed . Each Contractor QC sample and each Agency Acceptance sample shall be randomly obtained from each Sublot in accordance with 450.65: Quality Control Sampling and Testing Requirements , Part A and the prescribed sampling protocols for each Quality Characteristic as outlined in 450.65: Quality Control Sampling and Testing Requirements , Part F. Split samples shall be retained for each Sublot by both the Contractor II.280 202 4 Edition and the Department in accordance with 450.65: Quality Control Sampling and Testing Requirements , Part D. Table 486.51- 1: Control Strip Quality Limits Quality Characteristic Target Specification Limits LSL USL Engineering Limits LEL UEL Acceptance Limit PG Asphalt Binder Grading Per Binder Grade specified N/A N/A Per M3.02.1 Per M3.02.1 N/A PG Asphalt Binder Content ( UTBO -P) Per LTMF Target – 0.3% Target + 0.3% Target – 0.4% Target + 0.4% ≥70 PWL PG Asphalt Binder Content ( UTBO -AR) Per LTMF Target – 0.4% Target + 0.4% Target – 0.6% Target + 0.6% ≥70 PWL Combined Gradation: Passing #4 (4.75mm) and Larger Sieves Per LTMF N/A N/A Target – 7% Target + 7% N/A Combined Gradation: Passing #8 (2.36mm) Sieve Per LTMF N/A N/A Target – 5% Target + 5% N/A Combined Gradation: Passing #16 (1.18mm) to #50 (300 μm) Sieve Per LTMF N/A N/A Target – 4% Target + 4% N/A Combined Gradation: Passing #100 (150 μm) Sieve Per LTMF N/A N/A Target – 3% Target + 3% N/A Combined Gradation: Passing #200 (75 μm) Sieve Per LTMF N/A N/A Target – 1.5% Target + 1.5% N/A Ride Quality: Posted Speed Limit ≥55 mph 65 in./mi N/A 85 in./mi N/A 100 in./mi ≥70 PWL Ride Quality: Posted Speed Limit ≥40 but <55 mph 75 in./mi N/A 95 in./mi N/A 110 in./mi ≥70 PWL
: Opening to Traffic
Vehicular traffic or loads shall only be permitted on the newly completed UTBO pavement once the requirements of 450.52: Opening to Traffic are met. CONTRACTOR QUALITY CONTROL
486.60: General
The Contractor shall provide a Quality Control System (QC System) and, when required, a QC Plan, adequate to ensure that all materials and workmanship meet the required quality levels for each specified Quality Characteristic. The Contractor shall provide qualified QC personnel and QC II.281 202 4 Edition laboratory facilities and perform Quality Control inspection, sampling, testing, data analysis, corrective action (when necessary), and documentation as outlined further below.
486.61: Contractor Quality Control Plan
The Contractor shall prepare and implement a Construction QC Plan in accordance with the requirements of 450.61: Contractor Quality Control Plan .
486.62: Quality Control Personnel Requirements
The Contractor shall provide qualified QC personnel in accordance with the requirements of
450.62: Quality Control Personnel Requirements
486.63: Quality Control Laboratory Facility Requirements
The Contractor shall maintain a QC laboratory in accordance with the requirements of 450.63: Quality Control Laboratory Facility Requirements .
486.64: Quality Control Inspection
The Contractor shall perform QC inspection in accordance with the requirements of 450.64: Quality Control Inspection and Table 486.64 -1. II.282 202 4 Edition Table 4 86.64 -1: Minimum QC Inspection at UTBO Placement Location Inspection Component Inspection Attribute Minimum Inspection Frequency Point of Inspection Inspection Method Equipment As specified in QC Plan Per QC Plan Per QC Plan Per QC Plan Materials Temperature of Delivered UTBO Mix 4 per Day (See Note 1) From Haul Vehicle or Paver Hopper Check Measurement Environmental Conditions Underlying Surface Soundness & Moisture Per QC Plan Underlying Surface Visual Check Temperature of Air & Underlying Surface 1 per Day (See Note 2 ) At Paving Site Check Measurement Workmanship Joint Location & Alignment Per QC Plan Per QC Plan Visual Check Sawcut Joint Vertical Face Per QC Plan Joint Vertical Face Visual Check Temperature Differential in UTBO Mat Once per 500 ft per pavement course UTBO Mat Behind Paver Per 450.47: Hot Mix Asphalt Placement, Part D Physical Segregation Per QC Plan UTBO Mat Behind Paver & Compacted HMA Visual Check UTBO Lift Thickness Per QC Plan UTBO Lift Check Measurement UTBO Yield (See Note 3) Per QC Plan Compacted UTBO Area Check Measurement Cross- Slope Per QC Plan Compacted UTBO Check Measurement Joint Tightness Per QC Plan Compacted UTBO Visual Check Joint Surface Deviations Once per 500 ft per joint At Finished Joint 10-ft standard straightedge Wheel Path Deviations Once per 2,000 ft per Wheel Path Wheel Path 10-ft standard straightedge Note 1: The initial temperature measurements will be taken from the first or second load. Note 2: At a minimum, the temperature measurements of the air and underlying surface shall be obtained prior to starting the UTBO placement. Note 3: The calculated yield shall be compared to the estimated yield based on the UTBO unit weight established with the approved LTMF .
486.65: Quality Control Sampling and Testing Requirements
The Contractor shall perform QC sampling and testing in accordance with the requirements of
450.65: Quality Control Sampling and Testing Requirements and the following
II.283 202 4 Edition A. Quality Control Testing of UTBO Lots. The Contractor’s QC personnel will perform Quality Control testing at both the UTBO production facility and at the site of UTBO field placement to ensure that the production and placement processes are providing work conforming to the contract requirements . The Engineer shall be provided the opportunity to monitor and witness all QC testing of UTBO. All QC testing of UTBO Lots shall be in accordance with the current AASHTO, ASTM, NETTCP, or Department test methods specified in Table 486.65- 1 and the procedures outlined in 450.65: Quality Control Sampling and Testing Requirements, Part F. Table 486.65-1: Minimum Quality Control Sampling & Testing of UTBO Lots Quality Characteristic Test Method(s) Sublot Size Minimum Test Frequency Point of Sampling Sampling Method PG Asphalt Binder Grading Per Binder Grade Specification Per Supplier QC Plan or 24,000 tons of UTBO per
: Quality
Control Sampling and Testing Requirements, Part F(1) See 450.65: Quality Control Sampling and Testing Requirements, Part F(1) See 450.65: Quality Control Sampling and Testing Requirements, Part F(1) Random AASHTO R 66 Aggregate Gradation AASHTO T 27 Per QC Plan Per QC Plan At HMA Plant Per QC Plan Random AASHTO R 90 PG Asphalt Binder Content AASHTO T 308 300 tons 1 per Sublot (See Note 1 ) From Haul Vehicle at Plant Random AASHTO R 97 and R 47 Combined Aggregate Gradation AASHTO T 30 300 tons 1 per Sublot (See Note 1 ) From Haul Vehicle at Plant Random AASHTO R 97 and R 47 Ride Quality
Per 450.65: Quality Control Sampling and Testing Requirements, Part F(11) 0.1 miles per each Wheel Path 3 Runs per Sublot Each Pavement Course Per
: Quality
Control Sampling and Testing Requirements, Part F(11) Random Per
: Quality
Control Sampling and Testing Requirements, Part F(11) Note 1: In the event that the total daily UTBO production is less than one Sublot, a minimum of one random QC sample shall be obtained for the day’s production .
The Contractor shall perform QC testing of Ride Quality in accordance with the requirements of 450.65: Quality Control Sampling and Testing Requirements , Part F(11), however lift thicknesses less than 1.50 in . shall be subject to Ride Quality testing. II.284 202 4 Edition 486.66: Quality Control Documentation and Data Evaluation The Contractor shall document and evaluate all QC inspection and testing data in accordance with the requirements of 450.66: Quality Control Documentation and Data Evaluation .
486.67: Corrective Action
The Contractor shall implement corrective action for any part of a Lot that is determined by inspection or testing to not be in conformance with the quality requirements specified in accordance with the requirements of 450.67: Corrective Action.
486.68: Quality Control Records System
The Contractor shall maintain a Quality Control records system in accordance with the requirements of 450.68: Quality Control Records System . DEPARTMENT ACCEPTANCE
486.70: General
The Department is responsible for performing all Acceptance activities and making the final Acceptance determination for each UTBO Lot produced and placed. The Department’s Acceptance system will include monitoring the Contractor’s QC activity and performing Acceptance inspection, sampling and testing in order to determine the Quality and corresponding payment for each Lot. These activities will be performed for each UTBO Lot Category (Lot Category A, B, and C) as outlined further below.
486.71: Acceptance System Approach
Department Acceptance of each UTBO Lot will be based on an evaluation of the Department’s Acceptance inspection information and testing data in accordance with the requirements of 450.71: Acceptance System Approach .
486.72: Department Monitoring of Contractor Quality Control
The Department will monitor the Contractor’s QC System to confirm that QC activities are being performed for each Lot in compliance with this specification and the approved QC Plan in accordance with the requirements of 450.72: Department Monitoring of Contractor Quality Control.
486.73: Acceptance Inspection
The Engineer will perform Acceptance inspection of all work items addressed under this specification to ensure that all materials and completed work are in conformance with the requirements of 450.73: Acceptance Inspection .
486.74: Acceptance Sampling & Testing
The Department will perform Acceptance sampling and testing in accordance with the requirements of 450.74: Acceptance Sampling & Testing and the following.
The Department will perform Acceptance testing using the random samples obtained in accordance with 450.74: Acceptance Sampling & Testing , Part A from the HMA production facility and at the II.285 202 4 Edition site of UTBO field placement. The specific Quality Characteristics subject to Department Acceptance testing are identified in Table 486.74 -1. All Acceptance testing of UTBO Lots will be performed by the Engineer in accordance with the AASHTO, ASTM, NETTCP, or Department test methods specified in Table 486.74- 1 and the procedures outlined in 450.74: Acceptance Sampling & Testing , Part F. The Engineer will furnish a copy of all Department Acceptance test results/data to the Contractor within 5 days following completion of testing. Table 486. 74-1: Department Acceptance Sampling and Testing of UTBO Lots Quality Characteristic Test Method(s) Sublot Size Minimum Test Frequency Point of Sampling Sampling Method PG Asphalt Binder Grading Per Binder Grade Specification 12,000 tons of HMA using same PG Grade 1 per Sublot From In -line Sample Valve at HMA Plant Random AASHTO R 66 PG Asphalt Binder Content AASHTO T 308 300 tons 1 per Sublot sampled per
450.74:
Acceptance Sampling & Testing (See Note 1) From Haul Vehicle at HMA Plant Random AASHTO R97 and R 47 Combined Aggregate Gradation AASHTO T 30 300 tons 1 per Sublot sampled per
Acceptance Sampling & Testing (See Note 1) From Haul Vehicle at HMA Plant Random AASHTO R97 and R 47 Ride Quality
per 450.65: Quality Control Sampling and Testing Requirements, Part F(11) 0.1 miles per each Wheel Path 1 Per Sublot Each Pavement Course per
: Quality
Control Sampling and Testing Requirements, Part F(11) Random per
: Quality
Control Sampling and Testing Requirements, Part F(11) Note 1: In the event that the total daily UTBO production is less than one Sublot but greater than 150 tons, a minimum of one random Acceptance sample shall be obtained for the day’s production .
The Department will perform Acceptance testing of Ride Quality in accordance with the requirements of 450.74: Acceptance Sampling & Testing , Part F(7) however lift thicknesses less than 1.50 in. shall be subject to Ride Quality testing.
486.75: Split Sample Correlation
When Validated Contractor QC test data is to be included in the acceptance determination, Split Sample Correlation shall be performed by the Department and Contractor in accordance with the requirements of 450.75: Split Sample Correction and the following. Split Sample Correlation will be performed on split material samples for those Quality Characteristics identified in Table 486.75 -1. II.286 202 4 Edition Table 486.75-1: Split Sample Correlation Allowable Differences Quality Characteristic Test Method(s) Allowable Difference Between Contractor and Department Split Samples (d2s) PG Asphalt Binder Content AASHTO T 308 ± 0.35 Ride Quality (IRI) AASHTO R 56 Per 450.65: Quality Control Sampling and Testing Requirements, Part F(11)(d)
486.76: Lot Acceptance Determination Based on Inspection Results
The Department’s Acceptance Inspection results will be used in the final acceptance determination for all UTBO Lots (Lot Category A, B, and C). The materials and product workmanship for the completed work will be evaluated for conformance with the plans a nd the requirements specified in
: Preparation of Underlying Surface thru 486.52: Opening to Traffic and in accordance with
the requirements of 450.76: Lot Acceptance Determination Based on Inspection Results .
486.77: Lot Acceptance Determination Based on Testing Data
Lot Acceptance determination based on testing data will be performed in accordance with the requirements of 450.77: Lot Acceptance Determination Based on Testing Data and the following. The Department’s Acceptance data and all Validated Contractor QC data will be evaluated using the Quality Limits specified in Table 486.77 -1. Table 486.77- 1: Quality Limits for Acceptance of UTBO Lots Quality Characteristic Target Specification Limits LSL USL Engineering Limits LEL UEL Acceptance Limit PG Asphalt Binder Grading Per Binder Grade specified N/A N/A Per M3.01.0 Per M3.01.0 N/A PG Asphalt Binder Content (UTBO -P) Per JMF Target – 0.3% Target + 0.3% Target – 0.4% Target + 0.4% 60 PWL PG Asphalt Binder Content (UTBO -AR) Per JMF Target – 0.4% Target + 0.4% Target – 0.6% Target + 0.6% 60 PWL Ride Quality: Posted Speed Limit ≥55 mph (See Note 1) 65 in./mi N/A 85 in./mi N/A 100 in./mi 60 PWL Ride Quality: Posted Speed Limit ≥40 but <55 mph (See Note 1 ) 75 in./mi N/A 95 in./mi N/A 110 in./mi 60 PWL Note 1: Projects with posted speed limits that fall into more than one of the Posted Speed Limit ranges above will be divided into multiple Lots and evaluated separately . II.287 202 4 Edition 486.78: Quality Level Analysis Procedures. For each Quality Characteristic subject to analysis of Lot Quality Level, QLA will be used to determine the percentage of the Lot that is within the Specification Limits in accordance with the requirements of 450.78: Quality Level Analysis Procedures . DISPUTE RESOLUTION The Contractor or the Department may dispute any of the test values that are utilized in the acceptance determination for a given Lot in accordance with the requirements of 450.80: Disputable Items thru 450.84: Final Disposition . COMPENSATION
486.90: Method of Measurement
HMA for Patching will be measured for payment by the ton and shall be the actual quantity complete, in place and accepted by the Engineer.
Asphalt Emulsion for Bond Coat – Polymer Modified, as required by the plans or these specifications, will be measured by the gallon.
UTBO mixtures will be measured by the square yard and shall be the actual pavement course quantity complete, in place, and accepted by the Engineer.
486.91: Basis of Payment
HMA for Patching will be paid for at the contract unit price per ton of the HMA mixture type specified under Pay Item 451. Payment shall include all sawcutting, removal of existing distressed or unsound pavement, applying hot applied pavement joint adhesive to vertical faces, applying the tack coat to all required surfaces at the specified rate, and transportation, delivery, placement, and compaction of HMA for Patching.
Each UTBO course will be paid for at the contract unit price per square yard of in -place mixture under the UTBO Pay Items specified (Pay Items 486.1 through 486.5). Payment shall include sweeping the underlying surface, transportation, delivery, placement (including providing an MTV when required), and compaction of each UTBO pavement course. Payment shall also include the emulsion for bond coat and its application to all required surfaces at the specified rate. Mobile lighting for nighttime milling and paving is considered incidental to the cost of each UTBO pavement course placed. II.288 202 4 Edition All sawcutting required for transverse joints or longitudinal joints shall also be included in the contract unit price for each HMA pavement course. All required sawcutting in the existing pavement in accordance with this specification will be included in the contract unit price for each UTBO pavement course.
The Contractor's Quality Control system will be considered incidental to the work and shall be included in the Contract unit price for each UTBO pavement course. No separate payment will be made for any assistance provided by the Contractor to the Engineer in obtaining Department Acceptance samples. Failure of the Contractor to perform adequate Quality Control in accordance with the specifications and the Contractor’s approved QC Plan will be justification for withholding payment.
486.92: Pay Adjustment (PA)
Payment for each UTBO Category A Lot and Category B Lot will be determined based on the final Lot Quality Level (PWL) computed in accordance with the QLA procedures. Pay adjustments will be determined for each of the Acceptance Quality Characteristics identified in Table 486.92 -1. The relative pay adjustment weight assigned to each of the UTBO Quality Characteristics is indicated in Table 486.92 -1. Table 486. 92-1: Pay Adjustment Weight Assigned to UTBO Quality Characteristics UTBO Quality Characteristic Pay Adjustment Weight PG Asphalt Binder Content 35 percent Ride Quality (IRI) 65 percent
486.93: Payment Items
451. HMA for Patching ......................................................................................................... Ton
486.1Ultrathin Bonded Overlay - Type 1 - Polymer .................................................. Square Yard
486.2Ultrathin Bonded Overlay - Type 2 - Polymer .................................................. Square Yard
486.3Ultrathin Bonded Overlay - Type 3 - Polymer .................................................. Square Yard
486.4Ultrathin Bonded Overlay - Type 2 - Asphalt Rubber ................................... Square Yard
486.5Ultrathin Bonded Overlay - Type 3 - Asphalt Rubber ................................... Square Yard
999.490 HMA Pay Adjustment – PG Asphalt Binder Content1 .................................... Dollar
4 HMA Pay Adjustment –R ide Quality1 ................................................................... Dollar
1Not a bid item. II.289 202 4 Edition