[Amended 11-24-2008 by L.L. No. 4-2008]
A. 
This method is to be used only with prior written approval of the Town Superintendent of Highways. Bituminous macadam pavement shall consist of a base course, minimum depth of three inches, and a surface course, minimum depth of 2 1/2 inches.
B. 
Construction of the base course shall be as follows: The subbase must be cleaned of all loose or foreign materials and must be free of any soft or unstable area. Coarse aggregate, of No. 3 and No. 4A stone, meeting the requirements of Section 703-02, Coarse Aggregate, of the current Standard Specifications of New York State Department of Transportation, shall then be spread uniformly in loose layers and rolled with a three-wheel roller weighing no less than 10 tons. Rolling shall start longitudinally at the edge of the pavement with at least 1/2 of the rear wheel overlapping the shoulder and continuing toward the center of the pavement with an overlap of at least 1/2 of the width of the rear wheel on successive trips. Rolling shall continue until fragments of aggregate are finely interlocked. Thickness of this course shall be three inches after compaction. Upon completion of this course, an application of bituminous material of the kind specified in the plans, 1.50 gallons per square yard, shall be made by means of pressure distributors. Immediately after this application, fine aggregate of No. 1 stone, meeting the requirements of Section 703-01, Fine Aggregate, of the current Standard Specifications of New York State Department of Transportation, shall be applied in sufficient quantity to prevent the roller wheels from sticking and sufficient also to fill the surface voids. The surface shall then be rolled until it is firmly bound together and shows no movement under the roller.
C. 
The construction procedure for the surface course is similar to that of the base course. After the base course has been completed, course aggregate of No. 2 and No. 3 stone, meeting the requirements of Section 703-02 of current Standard Specifications of New York State Department of Transportation, shall be spread to thickness of 2 1/2 inches and rolled with a three-wheeled roller weighing no less than 10 tons. Immediately thereafter, bituminous material of the kind specified in the plans, at the rate of 1.6 gallons per square yard, shall be applied to the surface. Immediately after bituminous material has been applied and before it has time to break, No. 1 size stone, meeting the requirements of Section 703-01, Fine Aggregate, of Standard Specifications of New York State Department of Transportation, shall be spread over the surface (20 to 35 pounds per square yard) and be compacted with roller weighing no less than 10 tons. During the rolling process, additional No. 1 stone shall be applied and broomed about until the voids in No. 2 and No. 3 stone are entirely filled. After rolling has been completed, a second application of bituminous material shall then be immediately covered with No. 1 stone (15 to 25 pounds per square yard) and again rolled with a roller weighing no less than 10 tons. Additional No. 1 stone shall be applied and broomed about until the voids in the surface are filled and any excess emulsion asphalt has been absorbed. Rolling shall be continued until the course of stone is thoroughly compacted and its surface is uniform and true to the established grade and cross section.
D. 
Liquid bituminous material shall only be applied between April 15 and November 15 and when the stone is dry and clean, free of frost and the surface temperature is above 50º F. or with written permission of the Town Superintendent of Highways.
A. 
The contractor shall construct a two-course bituminous concrete pavement laid to conform to the required grade, thickness and cross section shown on the plans and specifications.
B. 
Materials and methods of construction shall conform to Section 401 of current Standard Specifications of the New York State Department of Transportation. The base course shall be Type 1, and the wearing course (top) shall be Type 6F.
C. 
After the base paving course has been thoroughly cleaned of all foreign material, an asphaltic concrete top course shall be uniformly spread by a self-propelled mechanical spreader with tamping bars and a heating unit in sufficient depth as to provide a finished compacted thickness after rolling thoroughly with a ten-ton roller.
D. 
After the base course has been completed and thoroughly cleaned of foreign material and a tack coat of asphalt emulsion applied to the surface at the rate of 0.1 to 0.2 gallon per square yard, in the event that the base course has been subject to traffic for an extended period of time, a final wearing course of fine asphaltic concrete shall be uniformly spread by a self-propelled mechanical spreader equipped with tamping bars and a heating unit and in sufficient depth as to provide the required finished compacted thickness after rolling thoroughly with a two- or three-wheel tandem roller weighing approximately 10 tons.
E. 
Extreme care shall be exercised in the placing of bituminous concrete to ensure that all longitudinal joints shall be lapped in the placing of adjoining strips and that all lateral joints are trimmed before continuing with the placing of additional materials on that strip.
F. 
Asphalt concrete may be applied year round. Written permission is required from the Town Superintendent of Highways between November 15 and April 15 or when the surface temperature is below 45º F. Core samples must be provided at the request of the Town Superintendent of Highways.
Bituminous Plant Mixtures
Base Type 1
Top Type 6, 6F
Mixture Requirements
General Limits Percent Passing
Job Mix Tolerance
(percent)
General Limits Percent Passing
Job Mix Tolerance
(percent)
Screen sizes
2 inch
100%
—
1 1/2 inch
90% to 100%
—
1 inch
78% to 95%
±5%
100%
—
1/2 inch
57% to 84%
±6%
90% to 100%
—
1/4 inch
40% to 72%
±7%
65% to 85%
±7%
1/8 inch
26% to 57%
±7%
36% to 65%
±7%
No. 20
12% to 36%
±7%
15% to 39%
±7%
No. 40
8% to 25%
±7%
8% to 27%
±7%
No. 80
4% to 16%
±4%
4% to 16%
±4%
No. 200
2% to 8%
±2%
2% to 6%
±2%
Asphalt cement, 0/0
4.0% to 6.0%
±0.4%
5.8% to 7.0%
±0.4%
Asphalt cement
Upstate
AC-10
AC-10
Grade and No.
702-02
702-02
Asphalt cement
Downstate
AC-20
AC-20
Grade and No.
702-03
702-03
Mixing and placing temperature range (degrees Fahrenheit)
250 to 325
250 to 325
Description and typical uses
Dense base course with relatively low permeability
Dense, granular texture for rural, suburban and urban arterial roadways
A. 
The contractor shall construct bituminous surface treatment (double course) as specified in approved plans and meeting the requirements of Section 410-3.02 of current Standard Specifications of New York State Department of Transportation.
B. 
Shoulders of highways with bituminous macadam pavement shall be treated with an additional surface treatment for surface texture and color contrast meeting the requirements of Section 410-3.04 of the current Standard Specifications of New York State Department of Transportation.
With the approval of the Town Highway Superintendent, roads meeting the specifications set forth in § 93-8D may be surfaced with gravel.
A. 
A surface course of sized or processed crushed gravel of not less than two inches, after compaction must be provided.
B. 
All gravel roads shall be graded so that the center crown is not less than four inches, or more than six inches higher than the outer edge of the roadway, depending on local conditions.