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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 Section 300 BASES AND SUBBASES SECTION 301 (VACANT) SECTION 302 - BITUMINOUS STABILIZED COURSE
302-1 DESCRIPTION. This work shall consist of furnishing and placing a course of bituminous
stabilized granular material and stabilized reclaimed asphalt pavement shoulder in conformance with this specification, the payment lines, and typical sections shown on the plans or as specified by the Engineer.
302-2 Materials .
302-2.01 General.
A.The Contractor has the following options in furnishing a bituminous stabilized course:
1.Option A. Furnish a granular material conforming to the requirements of Option A under §302 -2.03, mixed with an asphalt emulsion conforming to §702 -3201. Requests to use any asphalt emulsion other than that specified must be approved by the Director, Geotechnical Engineering Bureau. The written request must state the type of asphalt emulsion for the proposed use and be accompanied by a sample (one quart minimum) of such. The Geotechnical Engineering Bureau wil l require at least fourteen days to act upon the request, after receipt of the request and the sample.
2.Option B. Furnish a 3/4, 1 or 1 1/2 inch asphalt, mixed and placed in conformance with the Materials and Construction Details specified in Section 40 4, Asphalt Pavements, except as modified herein.
3.Option C. Furnish a granular material conforming to the requirements of Option C under §302 -2.03, mixed with the appropriate P.G. Binder specified in the contract and placed in accordance with the requirements of Section 40 4 except as modified herein. The amount of P.G. Binder for this option will be as ordered by the Engineer, but shall range between 6 and 8 percent by weight. Unless otherwise indicated by a Special Note in the Proposal , this option will be permitted only in Nassau and Suffolk Counties.
B.Before any Bituminous Stabilized Course is prepared, the Contractor shall take one of the following two actions:
1.Notify the Engineer in writing as to which option is selected to furnish material under. Only this option will then apply for the entire project unless written approval is received from the Engineer.
2.Submit to the Engineer for approval, a plan of the project delineating the areas where each option will apply. Exceptions to the approved plan during the course of the work shall be subject to advance written approval by the Engineer.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 302-2.02 Tests and Control Methods. Materials tests and quality control methods pertaining to the work of this Section will be performed in conformance with the procedures contained in the appropriate Department publications which are current on the date of advertisement for bids. These publications are availab le upon request to the Regional Director or the Director, Geotechnical Engineering Bureau.
302-2.03 Granular Material Requirements for Options A and C. All borrow sources of granular
materials for Options A and C shall be managed in accordance with the applicable provisions of Section 203, Borrow .
A.Gradation Requirements. The material for Options A and C shall conform to Table 302 -1.
B.Soundness. Granular materials will be accepted on the basis of a Magnesium Sulfate Soundness Loss after 4 cycles of 20 percent or less, unless other values are specified by a Special Note in the Proposal . TABLE 302 -1 GRADATION OF OPTIONS A & C, % PASSING BY WEIGHT Sieve Option 2 in 1 in 1/2 in 1/4 in # 10 # 40 # 100 # 200 A 100 30-65 5-40 0-10 C 100 85-100 65-85 55-75 20-40 5-18 4-12
C.Plasticity Index. The plasticity index shall not exceed 5.0 for the granular material unless otherwise stated in the Proposal by a Special Note.
302-3 Construction Details .
302-3.01 Weather Limitations for Option A. This work will not be permitted on a subbase or subgrade
containing frost, nor when the temperature of the surface on which the mixture is to be placed is below 45°F . All material placed under this section during any calendar year shall be mixed after March 1 of that year. No material shall be placed from the last Saturday of September to May 15, except with written permission of and under such special limitations and conditions as may be imposed by the Deputy Chief Engineer (Tec hnical Services).
302-3.02 Equipment for Mixing Option A. All equipment for this work shall be subject to approval of
the Engineer at all times. No work under this section will be permitted until all equipment and the processing facilities are established, inspected and approved. Mixing shall be done with a rotating paddle shaft pugmill, providing suitable pressure -kneading action in mixing. Mixing by blading, shoveling and/or scooping will not be permitted. The materials shall be mixed either at a central twin shaft pugmill mixing plant by the plant mix method, or on the roadbed (or some other area approved by the Engineer) by a traveling twin shaft pugmill, whichever equipment the Contractor elects to use. The mixer shall be either a continuous or a batch type pugmill, designed to accurately proportion either by volume or by weight, so that when the granular material and bituminous material are incorporated in the mix, a thorough and uniform coating of the granu lar material will result. The pugmill mixer shall be provided with weighing, volumetric or other gauging equipment which shall be capable of providing accurate control at all times of the amount of granular material entering the mixer per time interval. Th e mixer shall be equipped to mechanically interlock the bituminous feed with the granular material feed, such that uniformity of the mixture is assured at all times. A water pump with meter shall be available to add water to the granular material, just pri or to the addition of the bituminous material. The mixer shall be equipped with a positive displacement meter for totalizing the quantity of
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 bituminous material applied to the mixing chamber. A by -pass valve shall be placed on the bituminous line between the positive displacement meter and the spray bar in the pugmill to permit determination of the accuracy of the positive displacement meter. T he Contractor shall furnish a clean 55 gallon drum having one end completely open, and a length of flexible hose to permit filling from the by -pass valve on the bituminous line. Traveling pugmill mixing equipment shall not be operated at speeds greater than those recommended by the manufacturer for the depth of treatment and quantity of material used. Where the materials are mixed at a central twin shaft pugmill mixing plant, the pugmill mixing chamber shall extend at least 4 feet beyond the last point where the granular material, binder, and water are fed into the mixer, so that all materials will be completely and thoroughly mixed in the pugmill for a distance of at least 4 feet . The pugmill paddles shall be of a type adjustable for angular position on the shaft, and shall be reversible to allow retardation of the flow of the mixer, in order to control the mixing time. A dam or baffle, if approved in writing by the Director, Geotechnical Engineering Bureau may be used for the purpose of retarding flow. A mechanically operated discharge hopper of at least 1 cubic yard capacity shall be provided. Sufficient clearance for a ten wheel dump truck shall be provided beneath the discharge hopper to permit calibration.
302-3.03 Stockpiling and Sampling for Option A. Before mixing with the bituminous material, the
granular material shall be stockpiled, sampled and tested for approval as stipulated in §302 -2.02.
302-3.04 Mixing for Option A. The proportion of bituminous material that shall be mixed with the
granular material will range between 16 and 19 gallons per cubic yard , loose (uncompacted) measure. The actual proportion within this range, however, shall not be less than that determined by the Geotechnical Engineering Bureau and specified by the Engineer after the stockpiled granular material is sampled and tested. In com puting the rate of application, the loose measure volume shall be determined by level filling a truck, having a minimum capacity of 8 cubic yards , with granular material. No mixing will be allowed until the temperatu re of the granular material is 45°F or higher. The moisture content of the granular material, based on the material passing 3/4 inch sieve, just prior to the addition of the bituminous material, shall be in the range of 4 to 8 percent. The acceptable moisture content within this range shall be determined by the Engineer. All granular material removed from stockpiles for introduction into continuous twin shaft or traveling twin shaft pugmill mixers shall be by side excavation for the full height of the stockpile unless otherwise approved in writing by the Director, Geotechn ical Engineering Bureau. If mixed in a traveling plant, the method of transporting and introducing granular material from approved stockpiles into the mixer shall be as approved by the Engineer. The application temperature of the bituminous material shall be designated by the Engineer and be within the range of 130°F to 170°F. After the granular material and bituminous material have been introduced into the pugmill, the mixing shall continue for a length of time necessary to uniformly coat the particles and to obtain a homogeneous mixture. The discharge gates in a central plant shall not remain open during production of the stabilized mixture and shall only be opened in order to empty the hopper after the hopper becomes full. The discharged mixture may be immediately transported directly to the grade or stockpiles for later use. The material shall be transported to the stockpile by dump truck haul. If the Contractor wishes to utilize a method other than dump truck haul to construct stockpiles, a request shall be submitted to the Director, Geotechnical Engineering Bureau. The reque st shall include the proposed method and type of equipment to be used. Approval, if granted, will be based on the opinion of the Director, Geotechnical Engineering Bureau as to the capabilities of the proposal to provide a stockpile of uniformly mixed, uncontaminated material. If granted, such a waiver will remain in force on ly so long as all conditions for which the waiver is granted remain unchanged and a satisfactory material results.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2
302-3.05 Transporting, Spreading, Compacting and Finishing of Option A. If a central mixing plant
is used, the mixture shall be transported from the mixing plant or stockpiles to the point of use in pneumatic tired vehicles, having tight bodies previously cleaned of all other materials. Approved mechanical spreading equipmen t shall be used for placing. The mixture shall be spread in a thickness sufficient to produce the final compacted thickness shown on the plans. The maximum compacted thickness of any layer shall not exceed 4 inches . After spreading, the mixture shall not be compacted until properly cured. Adequate curing shall be the responsibility of the Contractor, who shall take into account all factors, including weather and time of the year. Material that cannot be properly and a dequately compacted to a stable condition shall be removed and replaced at no expense to the State. Compaction of the course shall be in accordance with the applicable provisions of §40 4-3.07, Compaction. Successive layers shall not be placed until the underlying layer has been satisfactorily compacted and approved by the Engineer.
302-3.06 Traffic. The movement of highway traffic and construction equipment over this course may be
permitted at locations designated by and in a manner under such restrictions as are ordered by the Engineer. Any damage occurring to the course as a result of traffic shal l be repaired at no expense to the State as ordered by the Engineer.
302-3.07 Care of Adjoining Pavement. Where this course constitutes a base course for a shoulder, the
Contractor shall organize the work and conduct the various operations so as to keep the surface of the adjacent pavement clean at all times, or shall bear the full expense of cleaning the pa vement as ordered by the Engineer.
302-3.08 Tolerance. Where used as a base course supporting other pavement courses, the final surface
elevation of this course shall not vary more than 1/4 inch above or below the design grade elevation at any location. Where used as a shoulder base course, the surface elevation of this course shall not vary more than 1/4 inch above or below, true grade at any location.
302-3.09 Maintenance. The Contractor shall be required to maintain the bituminous stabilized course in
good condition and in a manner satisfactory to the Engineer from the time work is begun until all work has been completed and accepted. Maintenance by the Contractor shall i nclude immediate repairs of any defects, regardless of cause, that may occur.
302-3.10 Repairs. Repairs to the bituminous stabilized course shall be made in a manner that will assure
restoration of a uniform surface and durability of the part repaired. A stabilized course that is either faulty, damaged or with low areas shall be repaired by replacing the stabilized course material to the full depth of treatment. When the extent of damage is essentially at the surface of the course and where the areas are low, the Contractor may elect to repair the course with a surface application of an approved, suitable, top course bituminous concrete mix, in lieu of a full depth material replacement.
302-4 METHOD OF MEASUREMENT. The quantity of Bituminous Stabilized Course to be measured
for payment, will be the number of cubic yards of compacted material computed from the payment lines shown on the plans, the specifications, or as ordered by the Engineer.
302-5 BASIS OF PAYMENT. The unit price bid per cubic yard shall include the cost of furnishing all
labor, materials and equipment, including bituminous material and water necessary to complete the work. Any work by the Contractor required for the maintenance or repair of bituminous stabilized course prior to acceptance of the contract, shall be done at the Contractor's expense.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 Payment will be made under: Item No. Item Pay Unit 302.01 Bituminous Stabilized Course Cubic Yard SECTION 303 (VACANT) SECTION 304 - SUBBASE COURSE
304-1 Description .
304-1.01 General. The work consists of furnishing, placing and compacting a subbase course of the
specified type in conformity with the lines, grades, thicknesses and typical sections shown in the contract documents.
304-1.02 Optional Type. When the Optional Type subbase item is specified, select any of the four (4)
options as follows:
A.Option A. Subbase construction consisting of two (2) separate layers of Type 4 and Type 3 Subbase Course.
B.Option B. Subbase construction consisting of a single layer of Type 1 Subbase Course.
C.Option C. Subbase construction consisting of a single layer of Type 2 Subbase Course.
D.Option D. Subbase construction consisting of a single layer of Type 4 Subbase Course.
304-1.03 Definitions. Deleterious: Any material that does not consist of concrete, asphalt, glass, brick,
stone, sand, gravel, blast furnace slag, or other materials deemed acceptable, when these materials are used in subbase in conformance with the specification requirements, OR any material which will adversely affect the performance of the product either during handling, during construction, or in its final application.
304-2 MATERIALS. Provide subbase material meeting the requirements of §733 -04 Subbase Course.
Provide a subbase material meeting the specification requirements and is within the Contractor’s capabilities to place and fine grade to the required tolerances. Should the subbase course become unstable at any time prior to the placement of the overlying course, correct the unstable condition at no additional cost to the State. Perform any required modification prior to placing the material on the grade. RAP will not be allowed as an acceptable alternate to Types 1, 3 and 4 at intersection locations or in areas with a high percentage of truck traffic as shown in the contract documents, unless Portland Cement Concrete pavement is to be installed as part of the pavement structure. A high percentage of trucks is defined to be 10% or more. For interstates and other freeways, a DDHV of 250 vph is used to indicate a high percentage of trucks.
304-3 Construction Details .
304-3.01 General. Notify the Engineer in writing of which placement option, material option (if
applicable) and/or material type is proposed for use, at least 14 calendar days prior to performing the work. If it is proposed that more than one option or type is to be used, s ubmit a plan to the Engineer describing where each option or type is proposed for use. This plan must be approved by the Engineer prior to incorporating it into the project. The State reserves the right to disapprove the use of more than
Source: New York Standard Specifications, 2024 Edition. Pages 122–125 of 1,264.