507DESCRIPTION

507.01 Description.

This work consists of furnishing properly distributed asphalt material followed by a uniform application of aggregate for building a riding surface, improving the surface friction of a roadway, sealing cracks in the roadway, reducing the rate of oxidation of a surface mixture, or as an interlayer to delay or reduce the occurrence of reflective cra cking. Asphalt Surface Treatment (AST), sometimes referred to as “chip seal,” consists of a specified emulsion applied “cold” or polymer modified asphalt material applied “hot,” at the temperature range specified in Table 507 -1 for cold applications or Tab le 507 -2 for hot applications, respectively. The application rates of asphalt material and aggregates will vary with aggregate size and existing roadway conditions but, for bid purposes only, shall meet the requirements of Table 507 -1 or Table 507 -2. The engineer will review the actual application rates.

507.02 Materials.

507.02.1 Asphalt: Use asphalt materials complying with Section

1002 that are Approved Material List produ cts. Comply with Table 507 -1 or 507 -2. Take samples of asphalt material in the presence of the engineer's representative. The engineer's representative will immediately take possession of the samples.

507.02.2 Aggregates: Aggregates shall comply with 1003.07 and

Table 1003 -15. Use Approved Material List aggregates shown herein or as designated on the plans. Asphalt Surface Treatment

507.01 Description.

This work consists of furnishing properly distributed asphalt material followed by a uniform application of aggregate for building a riding surface, improving the surface friction of a roadway, sealing cracks in the roadway, reducing the rate of oxidation of a surface mixture, or as an interlayer to delay or reduce the occurrence of reflective cra cking. Asphalt Surface Treatment (AST), sometimes referred to as “chip seal,” consists of a specified emulsion applied “cold” or polymer modified asphalt material applied “hot,” at the temperature range specified in Table 507 -1 for cold applications or Tab le 507 -2 for hot applications, respectively. The application rates of asphalt material and aggregates will vary with aggregate size and existing roadway conditions but, for bid purposes only, shall meet the requirements of Table 507 -1 or Table 507 -2. The engineer will review the actual application rates.

507.02 Materials.

507.02.1 Asphalt: Use asphalt materials complying with Section

1002 that are Approved Material List produ cts. Comply with Table 507 -1 or 507 -2. Take samples of asphalt material in the presence of the engineer's representative. The engineer's representative will immediately take possession of the samples.

507.02.2 Aggregates: Aggregates shall comply with 1003.07 and

Table 1003 -15. Use Approved Material List aggregates shown herein or as designated on the plans. Asphalt Surface Treatment

507.01 Description.

This work consists of furnishing properly distributed asphalt material followed by a uniform application of aggregate for building a riding surface, improving the surface friction of a roadway, sealing cracks in the roadway, reducing the rate of oxidation of a surface mixture, or as an interlayer to delay or reduce the occurrence of reflective cra cking. Asphalt Surface Treatment (AST), sometimes referred to as “chip seal,” consists of a specified emulsion applied “cold” or polymer modified asphalt material applied “hot,” at the temperature range specified in Table 507 -1 for cold applications or Tab le 507 -2 for hot applications, respectively. The application rates of asphalt material and aggregates will vary with aggregate size and existing roadway conditions but, for bid purposes only, shall meet the requirements of Table 507 -1 or Table 507 -2. The engineer will review the actual application rates.

507.02 Materials.

507.02.1 Asphalt: Use asphalt materials complying with Section

1002 that are Approved Material List produ cts. Comply with Table 507 -1 or 507 -2. Take samples of asphalt material in the presence of the engineer's representative. The engineer's representative will immediately take possession of the samples.

507.02.2 Aggregates: Aggregates shall comply with 1003.07 and

Table 1003 -15. Use Approved Material List aggregates shown herein or as designated on the plans. Asphalt Surface Treatment

507.01 Description.

This work consists of furnishing properly distributed asphalt material followed by a uniform application of aggregate for building a riding surface, improving the surface friction of a roadway, sealing cracks in the roadway, reducing the rate of oxidation of a surface mixture, or as an interlayer to delay or reduce the occurrence of reflective cra cking. Asphalt Surface Treatment (AST), sometimes referred to as “chip seal,” consists of a specified emulsion applied “cold” or polymer modified asphalt material applied “hot,” at the temperature range specified in Table 507 -1 for cold applications or Tab le 507 -2 for hot applications, respectively. The application rates of asphalt material and aggregates will vary with aggregate size and existing roadway conditions but, for bid purposes only, shall meet the requirements of Table 507 -1 or Table 507 -2. The engineer will review the actual application rates.

507.02 Materials.

507.02.1 Asphalt: Use asphalt materials complying with Section

1002 that are Approved Material List produ cts. Comply with Table 507 -1 or 507 -2. Take samples of asphalt material in the presence of the engineer's representative. The engineer's representative will immediately take possession of the samples.

507.02.2 Aggregates: Aggregates shall comply with 1003.07 and

Table 1003 -15. Use Approved Material List aggregates shown herein or as designated on the plans. For hot applications and interlayer applications, precoat aggre gates with a paving grade asphalt cement or a cationic emulsion. For precoated aggregates, the residual asphalt content shall be a minimum of 1.4 percent by weight of the aggregate for high absorption aggregates and 0.5 percent minimum by weight for low a bsorption aggregates as defined in AASHTO T84. The precoat applicator shall certify the quantities of precoat used in the process. Ensure that the precoated aggregate flows freely. The gradation requirements apply to the aggregate after precoating. Su bmit a gradation Certificate of Analysis with each aggregate shipment of 1000 cubic. yards or each project, whichever is less. If an emulsion is used for precoating, cure the stockpiled precoated aggregate prior to use.

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.03 EQUIPMENT. Provide asphalt distribu tors, pneumatic tire rollers,

power brooms or blowers, aggregate spreaders, and vacuum sweepers in accordance with Section 503 . Calibrate and maintain the necessary equipment for proper construction. Keep storage tanks, piping, booster tanks, distributors, and all other equipment used in delivering, storing, or handling asphalt materials clean and in good operating condition.

507.03.1 Powe r Asphalt Distributor: Provide a computer

operated asphalt distributor in accordance with 503.13.1 .

507.03.2 Pneumatic -tire Rollers: Use self -propelled rollers,

weighing at least 12 tons each in accordance with 503.16.4.1 .

507.03.3 Power Broom or Blower: Use a power revolving b room

or power blower in accordance with 503.16.4.2 .

507.03.4 Aggregate Spreader: Use a self -propelled, pneumatic

tire power spreader in accordance with 503.16.4.3 .

507.03.5 Vacuum -Sweeper: Provide a vacuum -sweeper when

there is a dusting problem in accordance with 503.16.4.4 .

507.03.6 Haul Trucks: Provide haul trucks in accordance with

503.11 .

507.04 WEATHER LIMITATIONS. Do not apply AST if any of the

following conditions occur:

507.05 PREPARATION OF EXIST ING SURFACE. Potholes and

surface depressions will be repaired by the Department prior to the asphalt surface treatment work unless shown otherwise on the plans. Prepare existing surface at no direct pay unless otherwise specified on the plans. Immediately prior to application of the asphalt material, clean and de - grass existing pavements over the full width to be treated. Remove raised pavement markers at no direct pay. Sweep the pavement with a power broom or blower to remove all loose material. Clean areas not reached by the power broom or blower by hand brooming or blowing. If used, ensure that the prime coat or curing membrane, is satisfactorily cured and maintained in accordance with Section 505 and Section 506 prior to application of AST. Obtain the e ngineer’s acceptance of the surface prior to application of AST.

507.06 APPLICATION. After the existing surface has been properly

prepared, apply asphalt material and aggregates in the amounts determined by the contractor and accepted by the engineer, and in the sequence specified herein. Apply and spread asphalt surfacing at the temperat ures and sequences given in Table 507 -1 or 507 -2. The quantities of material given in Table 507-1 or 507 -2 may be adjusted by the engineer as field conditions warrant. The type and condition of the surface being covered will affect the required applicati on rate of asphalt material. Use the quantities as recommended by the contractor and accepted by the engineer. Establish the actual rates during the first asphalt and aggregate application. film condenses moisture after being tightly placed on the pavement surface for 15 minutes;

507.05 PREPARATION OF EXIST ING SURFACE. Potholes and

surface depressions will be repaired by the Department prior to the asphalt surface treatment work unless shown otherwise on the plans. Prepare existing surface at no direct pay unless otherwise specified on the plans. Immediately prior to application of the asphalt material, clean and de - grass existing pavements over the full width to be treated. Remove raised pavement markers at no direct pay. Sweep the pavement with a power broom or blower to remove all loose material. Clean areas not reached by the power broom or blower by hand brooming or blowing. If used, ensure that the prime coat or curing membrane, is satisfactorily cured and maintained in accordance with Section 505 and Section 506 prior to application of AST. Obtain the e ngineer’s acceptance of the surface prior to application of AST.

507.06 APPLICATION. After the existing surface has been properly

prepared, apply asphalt material and aggregates in the amounts determined by the contractor and accepted by the engineer, and in the sequence specified herein. Apply and spread asphalt surfacing at the temperat ures and sequences given in Table 507 -1 or 507 -2. The quantities of material given in Table 507-1 or 507 -2 may be adjusted by the engineer as field conditions warrant. The type and condition of the surface being covered will affect the required applicati on rate of asphalt material. Use the quantities as recommended by the contractor and accepted by the engineer. Establish the actual rates during the first asphalt and aggregate application. film condenses moisture after being tightly placed on the pavement surface for 15 minutes;

507.05 PREPARATION OF EXIST ING SURFACE. Potholes and

surface depressions will be repaired by the Department prior to the asphalt surface treatment work unless shown otherwise on the plans. Prepare existing surface at no direct pay unless otherwise specified on the plans. Immediately prior to application of the asphalt material, clean and de - grass existing pavements over the full width to be treated. Remove raised pavement markers at no direct pay. Sweep the pavement with a power broom or blower to remove all loose material. Clean areas not reached by the power broom or blower by hand brooming or blowing. If used, ensure that the prime coat or curing membrane, is satisfactorily cured and maintained in accordance with Section 505 and Section 506 prior to application of AST. Obtain the e ngineer’s acceptance of the surface prior to application of AST.

507.06 APPLICATION. After the existing surface has been properly

prepared, apply asphalt material and aggregates in the amounts determined by the contractor and accepted by the engineer, and in the sequence specified herein. Apply and spread asphalt surfacing at the temperat ures and sequences given in Table 507 -1 or 507 -2. The quantities of material given in Table 507-1 or 507 -2 may be adjusted by the engineer as field conditions warrant. The type and condition of the surface being covered will affect the required applicati on rate of asphalt material. Use the quantities as recommended by the contractor and accepted by the engineer. Establish the actual rates during the first asphalt and aggregate application. Before the asphalt surface treatment operation begins, calibrate and set the flow rates of the distributor and spray bar along with the aggregate spreader at a remote location offsite in a manner acceptable to the engineer. Aggregate spread rates may be adjusted by the engineer. It should be noted that after the aggre gate spreader passes, the aggregate should never cover 100 percent of the roadway surface. The asphalt coated surface should be visible between the aggregates. Strike off aggregate trucks at the loading area for proper material yield measurements. The ag gregate spreader shall follow immediately behind the asphalt distributor. Make the initial pass with the rollers immediately following the aggregate spreader before the emulsion breaks.

507.06.1 Asphalt Material: In general, the rate of asphalt is

increased if the road is absorbent, badly cracked, or coarse, and is decreased if the road is smooth and flushed with asphalt. Guidelines for adjusting the rate of asphalt emulsion in gallons per square yards are shown in Table 507 -3. Do not allow the length of spread of asphalt material to exceed that which can be covered by aggregate within approximately one minute. Apply asphalt material at a uniform rate for the full width of treatment unless otherwise directed by the engineer. Keep the application of asphalt mate rial consistently within ±0.02 gallons per square yard, otherwise stop construction and recalibrate the distributor to the satisfaction of the engineer. Adjust the height of the spray bar and the angle of the nozzles so that individual spray fans do not i nterfere with each other and uniform double or triple coverage is achieved. Maintain a minimum of 100 gallons of asphalt material in the distributor during operation. Adjust and maintain one of the special spray nozzles at the ends of the spray bar to prov ide a sharp edge for the asphalt material on the edge of the roadway surface being covered. When the application is less in width than the length of the spray bar, move these special nozzles to provide the specified edge lines. When any nozzle becomes bl ocked during application of asphalt material, immediately stop the flow of material and clean the nozzles. When the engineer directs that application be made over less than the full width of the roadway at a time, slightly overlap adjacent treatments long itudinally. Operate the distributor along a marked edge to keep the surface treatment in proper alignment. Before the asphalt surface treatment operation begins, calibrate and set the flow rates of the distributor and spray bar along with the aggregate spreader at a remote location offsite in a manner acceptable to the engineer. Aggregate spread rates may be adjusted by the engineer. It should be noted that after the aggre gate spreader passes, the aggregate should never cover 100 percent of the roadway surface. The asphalt coated surface should be visible between the aggregates. Strike off aggregate trucks at the loading area for proper material yield measurements. The ag gregate spreader shall follow immediately behind the asphalt distributor. Make the initial pass with the rollers immediately following the aggregate spreader before the emulsion breaks.

507.06.1 Asphalt Material: In general, the rate of asphalt is

increased if the road is absorbent, badly cracked, or coarse, and is decreased if the road is smooth and flushed with asphalt. Guidelines for adjusting the rate of asphalt emulsion in gallons per square yards are shown in Table 507 -3. Do not allow the length of spread of asphalt material to exceed that which can be covered by aggregate within approximately one minute. Apply asphalt material at a uniform rate for the full width of treatment unless otherwise directed by the engineer. Keep the application of asphalt mate rial consistently within ±0.02 gallons per square yard, otherwise stop construction and recalibrate the distributor to the satisfaction of the engineer. Adjust the height of the spray bar and the angle of the nozzles so that individual spray fans do not i nterfere with each other and uniform double or triple coverage is achieved. Maintain a minimum of 100 gallons of asphalt material in the distributor during operation. Adjust and maintain one of the special spray nozzles at the ends of the spray bar to prov ide a sharp edge for the asphalt material on the edge of the roadway surface being covered. When the application is less in width than the length of the spray bar, move these special nozzles to provide the specified edge lines. When any nozzle becomes bl ocked during application of asphalt material, immediately stop the flow of material and clean the nozzles. When the engineer directs that application be made over less than the full width of the roadway at a time, slightly overlap adjacent treatments long itudinally. Operate the distributor along a marked edge to keep the surface treatment in proper alignment. To secure uniform distribution at the transverse junction of two treatments, stop the distributor promptly before the flow decreases. Place buildin g paper or other suitable material over the end of the previous application. Start the joining application on the building paper. Satisfactorily remove and dispose building paper in accordance with Section 202 or as directed. Do not burn building papers. During application of asphalt material, do not splatter adjacent pavements, structures, and trees with asphalt material. Do not clean or discharge the distribut or into ditches, borrow pits, on shoulders or along the right -of-way. Remove excess asphalt material at the junction between distributor loads or correct satisfactorily. Areas of the surface to be treated, which are not covered with asphalt material direct ly from the distributor shall be covered by means of a hand -held spray attachment equipped with nozzles.

507.06.2 Aggregates: Begin aggregate spreading operations

immediately after the application of the asphalt materials. Place all aggregates for hot application s in a surface dry condition. Apply aggregate material within approximately one minute after application of the asphalt material. Uniformly spread aggregate over the full width of asphalt material with one pass of the spreading equipment and with the appl ication being sharply defined at edges. Do not drive equipment on uncovered asphalt material. When necessary to obtain uniform coverage, hand broom the surface. Hand spreading will be permitted in conjunction with self -propelled spreaders over areas ina ccessible to spreaders. Cover asphalt material with the appropriate rate of aggregate before rolling.

507.06.3 Multiple Applications: When multiple applications are to

be placed, allow a minimum of 48 hours to elapse between each successive application of emuls ions. Successive hot applications can be placed without delay.

507.06.4 Interlayers: An interlayer shall be Type E as specified

herein and may be placed on raw or stabilized base, on a milled surface, between lifts of asphalt, or over existing portland cement con crete pavement which will be overlaid with asphalt. Use a liquid application rate that corresponds to the proper aggregate size given in Table 507 -1 or 507 -2 as adjusted by the engineer to meet existing conditions. Do not place asphalt concrete on an emu lsion surface treatment for a minimum of five days after application. Hot applied interlayers may be overlaid immediately. To secure uniform distribution at the transverse junction of two treatments, stop the distributor promptly before the flow decreases. Place buildin g paper or other suitable material over the end of the previous application. Start the joining application on the building paper. Satisfactorily remove and dispose building paper in accordance with Section 202 or as directed. Do not burn building papers. During application of asphalt material, do not splatter adjacent pavements, structures, and trees with asphalt material. Do not clean or discharge the distribut or into ditches, borrow pits, on shoulders or along the right -of-way. Remove excess asphalt material at the junction between distributor loads or correct satisfactorily. Areas of the surface to be treated, which are not covered with asphalt material direct ly from the distributor shall be covered by means of a hand -held spray attachment equipped with nozzles.

507.06.2 Aggregates: Begin aggregate spreading operations

immediately after the application of the asphalt materials. Place all aggregates for hot application s in a surface dry condition. Apply aggregate material within approximately one minute after application of the asphalt material. Uniformly spread aggregate over the full width of asphalt material with one pass of the spreading equipment and with the appl ication being sharply defined at edges. Do not drive equipment on uncovered asphalt material. When necessary to obtain uniform coverage, hand broom the surface. Hand spreading will be permitted in conjunction with self -propelled spreaders over areas ina ccessible to spreaders. Cover asphalt material with the appropriate rate of aggregate before rolling.

507.06.3 Multiple Applications: When multiple applications are to

be placed, allow a minimum of 48 hours to elapse between each successive application of emuls ions. Successive hot applications can be placed without delay.

507.06.4 Interlayers: An interlayer shall be Type E as specified

herein and may be placed on raw or stabilized base, on a milled surface, between lifts of asphalt, or over existing portland cement con crete pavement which will be overlaid with asphalt. Use a liquid application rate that corresponds to the proper aggregate size given in Table 507 -1 or 507 -2 as adjusted by the engineer to meet existing conditions. Do not place asphalt concrete on an emu lsion surface treatment for a minimum of five days after application. Hot applied interlayers may be overlaid immediately. To secure uniform distribution at the transverse junction of two treatments, stop the distributor promptly before the flow decreases. Place buildin g paper or other suitable material over the end of the previous application. Start the joining application on the building paper. Satisfactorily remove and dispose building paper in accordance with Section 202 or as directed. Do not burn building papers. During application of asphalt material, do not splatter adjacent pavements, structures, and trees with asphalt material. Do not clean or discharge the distribut or into ditches, borrow pits, on shoulders or along the right -of-way. Remove excess asphalt material at the junction between distributor loads or correct satisfactorily. Areas of the surface to be treated, which are not covered with asphalt material direct ly from the distributor shall be covered by means of a hand -held spray attachment equipped with nozzles.

507.06.2 Aggregates: Begin aggregate spreading operations

immediately after the application of the asphalt materials. Place all aggregates for hot application s in a surface dry condition. Apply aggregate material within approximately one minute after application of the asphalt material. Uniformly spread aggregate over the full width of asphalt material with one pass of the spreading equipment and with the appl ication being sharply defined at edges. Do not drive equipment on uncovered asphalt material. When necessary to obtain uniform coverage, hand broom the surface. Hand spreading will be permitted in conjunction with self -propelled spreaders over areas ina ccessible to spreaders. Cover asphalt material with the appropriate rate of aggregate before rolling.

507.06.3 Multiple Applications: When multiple applications are to

be placed, allow a minimum of 48 hours to elapse between each successive application of emuls ions. Successive hot applications can be placed without delay.

507.06.4 Interlayers: An interlayer shall be Type E as specified

herein and may be placed on raw or stabilized base, on a milled surface, between lifts of asphalt, or over existing portland cement con crete pavement which will be overlaid with asphalt. Use a liquid application rate that corresponds to the proper aggregate size given in Table 507 -1 or 507 -2 as adjusted by the engineer to meet existing conditions. Do not place asphalt concrete on an emu lsion surface treatment for a minimum of five days after application. Hot applied interlayers may be overlaid immediately. To secure uniform distribution at the transverse junction of two treatments, stop the distributor promptly before the flow decreases. Place buildin g paper or other suitable material over the end of the previous application. Start the joining application on the building paper. Satisfactorily remove and dispose building paper in accordance with Section 202 or as directed. Do not burn building papers. During application of asphalt material, do not splatter adjacent pavements, structures, and trees with asphalt material. Do not clean or discharge the distribut or into ditches, borrow pits, on shoulders or along the right -of-way. Remove excess asphalt material at the junction between distributor loads or correct satisfactorily. Areas of the surface to be treated, which are not covered with asphalt material direct ly from the distributor shall be covered by means of a hand -held spray attachment equipped with nozzles.

507.06.2 Aggregates: Begin aggregate spreading operations

immediately after the application of the asphalt materials. Place all aggregates for hot application s in a surface dry condition. Apply aggregate material within approximately one minute after application of the asphalt material. Uniformly spread aggregate over the full width of asphalt material with one pass of the spreading equipment and with the appl ication being sharply defined at edges. Do not drive equipment on uncovered asphalt material. When necessary to obtain uniform coverage, hand broom the surface. Hand spreading will be permitted in conjunction with self -propelled spreaders over areas ina ccessible to spreaders. Cover asphalt material with the appropriate rate of aggregate before rolling.

507.06.3 Multiple Applications: When multiple applications are to

be placed, allow a minimum of 48 hours to elapse between each successive application of emuls ions. Successive hot applications can be placed without delay.

507.06.4 Interlayers: An interlayer shall be Type E as specified

herein and may be placed on raw or stabilized base, on a milled surface, between lifts of asphalt, or over existing portland cement con crete pavement which will be overlaid with asphalt. Use a liquid application rate that corresponds to the proper aggregate size given in Table 507 -1 or 507 -2 as adjusted by the engineer to meet existing conditions. Do not place asphalt concrete on an emu lsion surface treatment for a minimum of five days after application. Hot applied interlayers may be overlaid immediately.

507.07 Rolling and Brooming Aggregate Material.

Roll the surface immediately after spreading the aggregate material using a minimum of three pneumatic tire rollers. Make the first pass within approximately one minute of spreading the aggregate. Proceed rolling in a longitudinal direction, beginning a t the outer edges of the application. Make a minimum of three (3) passes over a single point. Complete all rolling within 1/2 hour after aggregate material has been spread. Immediately correct any deficiencies or damage in the aggregate material detected during rolling and reroll as directed. Continue rolling aggregate material until uniform coverage has been obtained. Roll the remaining applications as specified for the first application. Do not use a steel wheel roller. Lightly broom or blow the sur face to remove loose material. Completely remove all loose material from all roadway surfaces, including paved shoulders. If the engineer determines the amount of loose material is excessive, pick it up and remove from the project instead of brooming ont o the adjacent slopes.

507.08 PROTECTION. Traffic shall not be allowed on the surface until

the aggregate has been placed, rolled, and, if necessary, lightly broomed or blown. For cold applications, lightly broom or blow each treatment beginning the next morn ing, and continue removing loose aggregate up to final acceptance of the project, if necessary. Distribute aggregate material over the surface to absorb any free asphalt, covering any area deficient with aggregate material, and roll as directed at no direc t pay. Do not displace embedded material during maintenance. When placing lightweight aggregate and a dusting problem occurs, use a vacuum sweeper without the sweeper engaged to remove loose aggregate. Loose aggregate material will not be permitted on t he surface and shall be promptly removed.

507.09 MEASUREMENT. The quantities of asphalt material and

aggregate incorporated into the completed and accepted asphalt surface treatment will be measured separately. Design quantities are based on horizontal dimens ions. Design quantities will be adjusted when the engineer makes changes to adjust to field conditions. Each size aggregate

507.07 Rolling and Brooming Aggregate Material.

Roll the surface immediately after spreading the aggregate material using a minimum of three pneumatic tire rollers. Make the first pass within approximately one minute of spreading the aggregate. Proceed rolling in a longitudinal direction, beginning a t the outer edges of the application. Make a minimum of three (3) passes over a single point. Complete all rolling within 1/2 hour after aggregate material has been spread. Immediately correct any deficiencies or damage in the aggregate material detected during rolling and reroll as directed. Continue rolling aggregate material until uniform coverage has been obtained. Roll the remaining applications as specified for the first application. Do not use a steel wheel roller. Lightly broom or blow the sur face to remove loose material. Completely remove all loose material from all roadway surfaces, including paved shoulders. If the engineer determines the amount of loose material is excessive, pick it up and remove from the project instead of brooming ont o the adjacent slopes.

507.08 PROTECTION. Traffic shall not be allowed on the surface until

the aggregate has been placed, rolled, and, if necessary, lightly broomed or blown. For cold applications, lightly broom or blow each treatment beginning the next morn ing, and continue removing loose aggregate up to final acceptance of the project, if necessary. Distribute aggregate material over the surface to absorb any free asphalt, covering any area deficient with aggregate material, and roll as directed at no direc t pay. Do not displace embedded material during maintenance. When placing lightweight aggregate and a dusting problem occurs, use a vacuum sweeper without the sweeper engaged to remove loose aggregate. Loose aggregate material will not be permitted on t he surface and shall be promptly removed.

507.09 MEASUREMENT. The quantities of asphalt material and

aggregate incorporated into the completed and accepted asphalt surface treatment will be measured separately. Design quantities are based on horizontal dimens ions. Design quantities will be adjusted when the engineer makes changes to adjust to field conditions. Each size aggregate

507.07 Rolling and Brooming Aggregate Material.

Roll the surface immediately after spreading the aggregate material using a minimum of three pneumatic tire rollers. Make the first pass within approximately one minute of spreading the aggregate. Proceed rolling in a longitudinal direction, beginning a t the outer edges of the application. Make a minimum of three (3) passes over a single point. Complete all rolling within 1/2 hour after aggregate material has been spread. Immediately correct any deficiencies or damage in the aggregate material detected during rolling and reroll as directed. Continue rolling aggregate material until uniform coverage has been obtained. Roll the remaining applications as specified for the first application. Do not use a steel wheel roller. Lightly broom or blow the sur face to remove loose material. Completely remove all loose material from all roadway surfaces, including paved shoulders. If the engineer determines the amount of loose material is excessive, pick it up and remove from the project instead of brooming ont o the adjacent slopes.

507.08 PROTECTION. Traffic shall not be allowed on the surface until

the aggregate has been placed, rolled, and, if necessary, lightly broomed or blown. For cold applications, lightly broom or blow each treatment beginning the next morn ing, and continue removing loose aggregate up to final acceptance of the project, if necessary. Distribute aggregate material over the surface to absorb any free asphalt, covering any area deficient with aggregate material, and roll as directed at no direc t pay. Do not displace embedded material during maintenance. When placing lightweight aggregate and a dusting problem occurs, use a vacuum sweeper without the sweeper engaged to remove loose aggregate. Loose aggregate material will not be permitted on t he surface and shall be promptly removed.

507.09 MEASUREMENT. The quantities of asphalt material and

aggregate incorporated into the completed and accepted asphalt surface treatment will be measured separately. Design quantities are based on horizontal dimens ions. Design quantities will be adjusted when the engineer makes changes to adjust to field conditions. Each size aggregate

507.07 Rolling and Brooming Aggregate Material.

Roll the surface immediately after spreading the aggregate material using a minimum of three pneumatic tire rollers. Make the first pass within approximately one minute of spreading the aggregate. Proceed rolling in a longitudinal direction, beginning a t the outer edges of the application. Make a minimum of three (3) passes over a single point. Complete all rolling within 1/2 hour after aggregate material has been spread. Immediately correct any deficiencies or damage in the aggregate material detected during rolling and reroll as directed. Continue rolling aggregate material until uniform coverage has been obtained. Roll the remaining applications as specified for the first application. Do not use a steel wheel roller. Lightly broom or blow the sur face to remove loose material. Completely remove all loose material from all roadway surfaces, including paved shoulders. If the engineer determines the amount of loose material is excessive, pick it up and remove from the project instead of brooming ont o the adjacent slopes.

507.08 PROTECTION. Traffic shall not be allowed on the surface until

the aggregate has been placed, rolled, and, if necessary, lightly broomed or blown. For cold applications, lightly broom or blow each treatment beginning the next morn ing, and continue removing loose aggregate up to final acceptance of the project, if necessary. Distribute aggregate material over the surface to absorb any free asphalt, covering any area deficient with aggregate material, and roll as directed at no direc t pay. Do not displace embedded material during maintenance. When placing lightweight aggregate and a dusting problem occurs, use a vacuum sweeper without the sweeper engaged to remove loose aggregate. Loose aggregate material will not be permitted on t he surface and shall be promptly removed.

507.09 MEASUREMENT. The quantities of asphalt material and

aggregate incorporated into the completed and accepted asphalt surface treatment will be measured separately. Design quantities are based on horizontal dimens ions. Design quantities will be adjusted when the engineer makes changes to adjust to field conditions. Each size aggregate will be measured by the square yard per application. Asphalt material will be measured in the distributor by the gallon at applic ation temperatures.

507.10 PAYMENT. Payment for placement and maintenance of asphalt

materials and aggregates will be made at the contract unit prices, subject to the payment adjustment provisions of Section 1002 for specification deviations of asphalt materials. The Materials and Testing Section will provide the payment adjustment percentage for asphalt materials. Payment for removal of pavement markings will be incl uded in this pay item. Payment will be made under: Item No. Pay Item Pay Unit 507-01 Asphalt Material (type) Gallon 507-02 Aggregate (size) Square Yard will be measured by the square yard per application. Asphalt material will be measured in the distributor by the gallon at applic ation temperatures.

507.10 PAYMENT. Payment for placement and maintenance of asphalt

materials and aggregates will be made at the contract unit prices, subject to the payment adjustment provisions of Section 1002 for specification deviations of asphalt materials. The Materials and Testing Section will provide the payment adjustment percentage for asphalt materials. Payment for removal of pavement markings will be incl uded in this pay item. Payment will be made under: Item No. Pay Item Pay Unit 507-01 Asphalt Material (type) Gallon 507-02 Aggregate (size) Square Yard Table 507 -1 Asphalt Surface Treatment (AST) Requirements (Cold Application) Course No. AST TYPE A AST TYPE B AST TYPE C AST TYPE D AST TYPE E (Interlayer) Aggregate Lightweight, Crushed Stone Lightweight, Crushed Stone Lightweight, Crushed Stone Lightweight, Crushed Stone, Crushed Gravel Crushed Stone, Crushed Gravel Agg. Friction Rating I, II I, II, III I, II, III I, II, III, IV I, II, III, IV Asphalt Emulsion CRS -2P CRS -2P CRS -2P CRS -2P CRS -2P Application Temp. Minimum 160F 160F 160F 160F 160F Maximum 175F 175F 175F 175F 175F Number of Applications 2 1 2 1 1 3 2 1 2 Asphalt Emulsion1 Application Rates Per Course 1 0.39 0.41 0.39 0.31 0.41 0.46 0.39 0.31 0.39 2 0.29 — 0.29 — — 0.36 0.29 — 0.29 3 — — — — — 0.26 — — — Aggregate size and Application Rates Per Course2 1 S2-0.0111 S2-0.0111 S2-0.0111 S3-0.0075 S2-0.0111 S1-0.0200 S2-0.0111 S3-0.0075 S2-0.0111 2 S3-0.0075 — S3-0.0075 — — S2-0.0111 S3-0.0075 — S3-0.0075 3 — — — — — S3-0.0075 — — — 1Application rates are in gallons of asphalt emulsion per square yard of AST. 2Size aggregate and application rates. For example, S2 is Size 2 aggregate and 0.0111 is the application rate in cubic yards of aggregate per square yard of AST. S1A may be used in lieu of S1. Aggregate sizes f or AST are shown in Table 1003 -15. Table 507 -2 Asphalt Surface Treatment (AST) Requirements (Hot Application) Course No. AST TYPE A AST TYPE B AST TYPE C AST TYPE D AST TYPE E (Interlayer) Aggregate Lightweight, Crushed Stone Lightweight, Crushed Stone Lightweight, Crushed Stone Lightweight, Crushed Stone, Crushed Gravel Crushed Stone, Crushed Gravel Agg. Friction Rating I, II I, II, III I, II, III I, II, III, IV I, II, III, IV Asphalt Cement1 PAC -15 PAC -15 PAC -15 PAC -15 PAC -15 Application Temp. Minimum 300F 300F 300F 300F 300F Maximum 360F 360F 360F 360F 360F Number of Applications 2 1 2 1 1 3 2 1 2 Asphalt Cement2 Application Rates Per Course 1 0.30 0.31 0.30 0.24 0.31 0.36 0.30 0.24 0.30 2 0.23 — 0.23 — — 0.28 0.23 — 0.23 3 — — — — — 0.20 — — — Aggregate size and Application Rates Per Course3 1 S2-0.0111 S2-0.0111 S2-0.0111 S3-0.0075 S2-0.0111 S1-0.0200 S2-0.0111 S3-0.0075 S2-0.0111 2 S3-0.0075 — S3-0.0075 — — S2-0.0111 S3-0.0075 — S3-0.0075 3 — — — — — S3-0.0075 — — — 1See Table 1002 -11. 2Application rates are in gallons of asphalt cement per square yard of AST. 3Size aggregate and application rates. For example, S2 is Size 2 aggregate and 0.0111 is the application rate in cubic yards of aggregate per square yard of AST. S1A may be used in lieu of S1. Aggregate sizes for AST are shown in Table 1003 -15. Table 507 -3 Asphalt Emulsion Adjustment Rate Existing Surface Condition Adjustment rate in Gallons/Sq Yd Black, flushed asphalt -0.1 to -0.06 Smooth, non -porous 0.00 Absorbent, porous, oxidized 0.03 to 0.09 308 Section 508 Vacant 309 Section 509 Milling Asphalt Pavement

509.01 DESCRIPTION. Remove asphalt concrete surfacing by milling in

accordance with these specifications and in conformity with the average depth, width, grade, cross -slope and typical sections shown on the plans or as establi shed.

509.02 EQUIPMENT. Use an approved self -propelled milling machine or

grinder for milling asphalt surfacing in accordance with 503.12 .

509.03 CONSTRUCTION REQUIRE MENTS. Pavement surfaces

resulting from milling operations shall be of uniform texture, grade and cross slope and free from loose material. Re -mill surfaces not meeting these requirements at no direct pay. Uneven, undulating surfaces will not be accepted. If ri dges are excessive, the engineer may require additional milling, replacement of milling machine teeth, or other corrective action. Limit the maximum depth of milling to 2 inches per day when traffic is being maintained. Maintain a maximum 2 -inch depth at milling edge of embankment at all times. Use a minimum length 25 -foot traveling reference plane on the first pass of the milling machine. A shoe device may be used on adjacent passes. When the entire roadway width has not been planed to a flush surface by the end of a work period , resulting in a vertical or near vertical longitudinal face exceeding 2 inches in height, slope this longitudinal face as directed. Place smooth transitions at transverse joints prior to restoring to traffic by milling or by us ing an asphalt concrete mix. Do not use RAP. Transitions shall be a minimum length of one linear foot per 1/4 inch of the milled depth. Make provisions at drives and turnouts to maintain local traffic. Remove asphalt concrete next to structures or in sm all irregular areas that cannot be removed by the milling machine by other acceptable methods. Provide drainage of milled areas where needed by cutting through the shoulder to the ditch on the same day that adjacent milling is performed.