§ A206-38. Pavement.

After the foundation course has been inspected and approved by the Town Highway Superintendent and/or Town Engineer with the two-month settlement period elapsed and the three-inch gravel leveling course has been thoroughly compacted and trimmed to present an even surface, both in profile and cross section and allowing for the required depth of finished pavement, one of the following two types of pavement shall be laid:

A. 

"Blacktop" (asphaltic concrete pavement).

(1) 

Description.

(a) 

After the foundation courses have been completed, two or three courses of asphaltic concrete paving shall be applied. Materials shall conform to the NYSDOT Standard Specifications and shall be furnished by a bulk asphaltic producer regularly engaged in the production of hot-mix, hot-laid asphaltic paving materials.

(b) 

Materials shall not be placed over wet or frozen subgrade surfaces. Install asphalt surface materials only when base is dry and surface temperature is 50° F. or above and air temperature is 40° F. or above.

(2) 

Materials.

(a) 

The base course and/or binder course shall be an asphaltic leveling course equal to NYSDOT Item No. 403.13 asphalt concrete Type 3 binder course.

(b) 

The top course shall be an asphaltic surface course equal to NYSDOT Item No. 403.18 asphalt concrete Type 7, top course.

(3) 

Tolerances.

(a) 

In place compacted thickness:

[1] 

Base course: maximum 1/2 inch.

[2] 

Surface course: maximum 1/4 inch.

(b) 

Finished surface smoothness:

[1] 

Base course: maximum 3/8 inch in 10 feet.

[2] 

Surface course: maximum 1/4 inch in 10 feet in any direction.

(4) 

Equipment.

(a) 

Paving equipment: spreading, self-propelled asphaltic paving machines capable of maintaining line, grade and thickness as required.

(b) 

Compacting equipment: self-propelled rollers, minimum ten-ton effective weight.

(5) 

Installation.

(a) 

Remove loose and foreign material from compacted base immediately before application of surface materials. Do not start surface work until all other work which may damage the finish surface is completed.

(b) 

Install asphalt surface materials in two or three courses as required, base course, leveling course and surface course, total compacted depth as required.

(c) 

Place, spread and strike off the asphalt concrete mixture on a properly prepared and conditioned surface. Inaccessible and small areas may be placed by hand. Place each course to the required grade, cross-section and schedule compacted thickness.

(d) 

Place materials in strips not less than 10 feet wide. After the first strip has been placed and rolled, place all succeeding strips and extend rolling to overlap previous strips. Complete base course for a section before placing surface course materials.

(e) 

Carefully make joints between old and new pavements, and between successive day's work, to ensure a continuous bond between adjoining work. Construct joints to have the same texture, density and smoothness as other sections of the asphalt concrete course.

(f) 

Begin rolling operations when the asphalt concrete mixture will bear the weight of the roller without excessive displacement. Compact areas inaccessible to rollers with vibrating plate compactors.

(g) 

Rolling shall continue until the asphalt concrete mixture has been compacted to the required surface density and smoothness. Continue rolling until all roller marks are eliminated. Provide a smooth, compacted surface texture to thickness and elevations required.

(h) 

Protect newly placed material from traffic by barricades or other suitable methods acceptable to the Town Superintendent of Highways.

(6) 

Field quality control.

(a) 

Test for surface smoothness with ten-foot straight-edge. Deficient areas shall be defined, removed and replaced, or adjusted to design thickness by methods acceptable to the Town Superintendent of Highways and/or Town Engineer.

(b) 

When, during progress of work, field inspection indicates that installed compacted materials do not meet specified requirements, remove defective materials and install new materials at contractor's expense as directed by the Town Superintendent of Highways and/or Town Engineer.

(7) 

Protection. Protect paving from damage due to construction and vehicular traffic until final acceptance.

(8) 

Cleaning.

(a) 

Perform cleaning during installation of the work and upon completion of the work. Remove from site all excess materials, debris, and equipment. Repair damage resulting from paving operations.

(b) 

Sweep pavement and wash free of stains, discolorations, dirt and other foreign material immediately prior to final acceptance.

(9) 

Pavement schedule.

(a) 

Asphalt binder course: three-inch compacted depth;

(b) 

Asphalt top course: 1 1/2-inch compacted depth; or

(c) 

Compacted motor paving: 3 1/2-inch compacted depth.

B. 

Road mix bituminous pavement (motor paving).

(1) 

Description. This work shall consist of constructing one or more courses of road mix bituminous pavement on a prepared base in accordance with these specifications and in substantial conformance with the lines, grades, thicknesses and typical cross-sections shown on the plans or established by the Engineer.

(2) 

Materials.

(a) 

Bituminous material. The bituminous material shall meet the requirements of 702-31, "Asphalt Emulsion" or "Cationic Asphalt Emulsion." The type of bituminous materials shall be as specified on the plans or in the proposal unless otherwise directed by the Town Highway Superintendent and/or the Town Engineer.

(b) 

Aggregates: The aggregates shall be Department-approved aggregates meeting the requirements of 703-02, "Coarse Aggregates," for the sizes specified.

(c) 

Hydrated lime: Hydrated lime shall meet the requirements of 712-04, "Hydrated Lime."

(d) 

Composition of mixtures: The bituminous road mix shall generally be composed of a mixture of aggregate, hydrated lime, if required, and bituminous material. The mix shall be proportioned as specified in the table below "Composition of Bituminous Road Mixtures."

	Table
	Composition of Bituminous Road Mixtures
	Aggregate Sizes	MIX 1 General Limits	MIX 2 General Limits
	#2	75% to 85%	—
	#1	15% to 25%	75% to 85%
	#1A	—	15% to 25%
	Bituminous material	4.0 to 6.0	4.7 to 6.7

	Notes:
	1.	Percentage based on total aggregate weight.
	2.	Percentage based on total mix weight.
	3.	When asphalt emulsion, Material Designation 702.31, is used, 0.2% to 0.3% of hydrated lime may be added to the mix to hasten the break of the emulsion.