C05 - 11 - Product and Aggregate Specifications.pdf
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- Attached to
- USFS - Route 1 Road Repair - V2.
- Solicitation number
- 127EAW26Q0044
- Issued by
-
Department of Agriculture Forest Service
About this file
This document contains federal government specifications for bituminous products and aggregates used in road construction and maintenance.
Bituminous Products Specifications (Section 892): The specification establishes requirements for asphalt cements, liquid asphalts, emulsified asphalts, and bituminous dust palliatives. Asphalt cements must comply with AASHTO M 20 (penetration graded) or AASHTO M 226 (viscosity graded). Liquid asphalts are categorized by curing speed—rapid curing (AASHTO M 81), medium curing (AASHTO M 82), and slow curing (AASHTO M 141)—with emulsified asphalts in both anionic (AASHTO M 140) and cationic (AASHTO M 208) types. Bituminous dust palliatives must meet requirements specified in Table 892.06. A certificate of compliance format is required for all shipments, documenting consignee, contract number, material type and grade, additive information, loading temperature, and net weight/gallons. Application temperature ranges vary by material type, from 50°F minimum for certain emulsified asphalts to 400°F maximum for asphalt cement spray applications. Contractors must provide self-powered bituminous distributors equipped with pumps, spray bars, tachometers, pressure gauges, volume measuring devices, and thermometers. Weather restrictions prohibit application when surface temperature is below 50°F (or 60°F if falling), during fog, rain, or storms, and require sufficient surface moisture for uniform dispersion.
Aggregate Specifications (Section 893): The specification covers aggregates for various bituminous applications including plant-mix, road mix, spot surfacing, and hot/cold plant-mix pavements. Coarse aggregates (retained on No. 8 sieve) must be crushed stone, crushed slag, or gravel conforming to AASHTO M 79 or M 63, with at least 50 percent by weight of particles on No. 4 sieve having one fractured face when crushed gravel is used. Fine aggregates (passing No. 8 sieve) must conform to AASHTO M 29 (ASTM D 1073). Sodium sulfate soundness loss limits range from 9 to 12 percent depending on application. Aggregates for cover coats and surface treatments must meet AASHTO M 78 and retain bituminous film above 95 percent per AASHTO T 182, with chemical additives or wetting agents permitted if this requirement is not met. Lightweight aggregates, when permitted, must conform to AASHTO M 195. Specific gradation requirements are detailed in Special Project Specifications, with flexibility allowing commercially produced aggregates meeting state or county gradations as equal alternates if quality requirements are satisfied. Contractors must provide testing and certification of supplied materials.
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892 BITUMINOUS PRODUCTS 1
892 BITUMINOUS PRODUCTS (5/97)
1. ASPHALT CEMENTS
Asphalt cement shall meet the requirements of AASHTO M 20 for penetration graded asphalt cement and to AASHTO M 226 for viscosity graded asphalt cement.
2. LIQUID ASPHALTS
Liquid asphalts shall meet the requirements of the following specifications:
Rapid Curing Liquid Asphalts AASHTO M 81
Medium Curing Liquid Asphalts AASHTO M 82
Slow Curing Liquid Asphalts AASHTO M 141
3. EMULSIFIED ASPHALTS
Emulsified asphalts shall meet the requirements of the following specification:
Emulsified Asphalt (Anionic) AASHTO M 140 (ASTM D
Emulsified Asphalt (Cationic) AASHTO M 208* (ASTM D 2397)
4. BITUMINOUS DUST
Bituminous dust palliatives shall meet the requirements listed in Table 892.06
5. CERTIFICATE OF COMPLIANCE
a. In accordance with the requirements of Contract , the following format is established.
Consignee ____________________ Designation ___________________
Contract Number _______________ Date _________________________
Identification (Truck No., Car No., Etc.) _________________________________
Type and Grade _____________ With Additive (%, brand) __________
Loading Temperature _________ Net Weight _____________________
892 BITUMINOUS PRODUCTS 2
Net Gallons _________________
b. The shipment of bituminous material identified above and covered by the bill of lading complies with Government Standard Specification as modified by Special Project Specifications applicable to this project.
Producer ___________________ Signed _________________________
(Producer’s Representative)
6. APPLICATION TEMPERATURES
Bituminous materials shall be applied within the temperature ranges indicated in Table 892.06.
TABLE 892.06 - Application Temperatures
Application Temperature Range # (Degrees F)
Type & Grade of Material Spray
Min./Max
Mix
Min./Max.
RT 1-2-3 60-130 60-130
RT 4-5-6 85-150 85-150
RT 7-8-9 150-225 50-225
RT 10-11-12 175-250 175-250
RTCB 10-11-12 60-120 60-120
RC-MC-SC 70 105-185 90-155
RC-MC-SC 250 140-225 125-200
RC-MC-SC 800 175-265 160-225
RC-MC-SC 3000 215-290 200-260
DO-1-2-3 80-125
DO-4 80-175
Emulsified Asphalts:
RS-1, SS1, SS-1H, & CRS-1,
CSS-1, CSS-1H
75-130 70-160
RS-2, MS-2, CR-2, & CMS-2S,
CMS-2
110-160 70-160
DO-6-7-8 50-140
Asphalt Cement
(All Grades)
400 Max. 250-325
892 BITUMINOUS PRODUCTS 3
As required to achieve viscosity of 75-150 seconds. Saybolt-Furol or as required to achieve a Kinematic viscosity of 150-300 centistrokes.
7. EQUIPMENT
The Contractor shall provide equipment for heating and applying the bituminous material. The bituminous distributor shall be self-powered and mounted on pneumatic tires. It shall be equipped with a pump and a circulating spray bar. The unit shall include a tachometer, pressure gauges, accurate volume measuring devices such as a visual volume dial or gauge calibrated to the tank, and a tank thermometer.
All equipment shall be standard, commercial types, of proven performance.
8. WEATHER LIMITATIONS
Bituminous dust palliative treatment shall be applied only when the surface to be treated contains sufficient moisture to get uniform dispersion of the dust palliative when the road surface and atmospheric temperature are 50 degrees F or more and rising, or above 60 degrees F if falling; and when the weather is not foggy, rainy, or stormy.
893 AGGREGATE 1
893 AGGREGATE (5/97)
1. GRADATIONS
a. Gradations for aggregates are included in Special Project Specifications for contracts where the aggregates are not provided by the Government.
b. The inclusion of aggregate gradations does not constitute a warranty by the Government that commercial sources in the area are producing the gradation indicated. Aggregates commercially produced to meet State or County gradations and specifications for similar materials will be considered an equal alternate to the gradation in the contract provided the following quality requirements are met. Contractor shall provide testing and certification of supplied materials.
2. AGGREGATE FOR BITUMINOUS PLANT-MIX
a. Coarse Aggregate - Coarse aggregate (retained on the No. 8 sieve) shall be crushed stone or crushed or natural gravel and shall conform to the quality requirements of AASHTO M 63.
Gradation shall conform to the provisions of the Special Project Specifications.
b. Fine Aggregate - Fine aggregate (passing the No. 8 sieve) shall be manufactured and conform to the quality requirements of AASHTO M 29 (ASTM D 1073). It shall be of such a gradation that when combined with the other required aggregate fractions in the proper proportion, the resultant mixture will meet the gradation required.
3. AGGREGATE FOR BITUMINOUS ROAD MIX
a. Aggregates for bituminous road mix shall be crushed stone, or crushed or natural gravel which meets the quality requirements of AASHTO M 62 or M 63 for the specified gradation, except the sodium sulfate soundness loss shall not exceed 9 percent. The swell test will not be required.
b. Gradation shall be as shown in the Special Project Specifications. When crushed gravel is used, not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face.
4. AGGREGATE FOR SPOT SURFACING
a. Aggregates for spot surfacing shall be crushed stone, crushed slag, or crushed or natural gravel which conforms to the quality requirements of AASHTO M 147, or as specified in the Special Project Specifications, except as noted below: The requirements of M 147 shall apply, except that the liquid limit shall not exceed 35 and the plasticity index shall be not be less than 4 nor more than 9.
893 AGGREGATE 2
b. Aggregate gradation shall conform to the provisions of the Special Project Specifications and
AASHTO M 147.
c. When crushed gravel is used, not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face.
d. Gradations of each designated size of aggregates shall be obtained by crushing, screening, and blending processes as may be necessary.
e. Materials otherwise meeting the requirements of this subsection will be acceptable whenever the gradations of such materials are within the tolerances corresponding to the selected sieve sizes required by the Special Project Specifications and whenever such materials produce a compacted course meeting density requirements as specified in Specification Section 811(2)(e).
5. AGGREGATE FOR BITUMINOUS CONCRETE - GENERAL
a. Coarse Aggregate
1) Coarse aggregate (retained on the No. 8 sieve) shall be crushed stone, crushed slag, or crushed or natural gravel, and unless otherwise stipulated, shall conform to the quality requirements of AASHTO M 79.
2) Lightweight aggregate, if required or permitted by the Special Project Specifications, shall meet the requirements of AASHTO M 195.
3) When crushed gravel is used, it shall also meet the requirements of Section 2.1 of AASHTO M 62 and not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face. The coarse aggregate shall be of such gradation that when combined with other required aggregate fractions in proper proportion, the resultant mixture shall meet the gradation required under the composition of mixture for the specific type under contract.
b. Fine Aggregate
1) Fine aggregate (passing the No. 8 sieve) shall consist of natural sand, stone screenings, or slag screenings, or a combination thereof, and unless otherwise stipulated shall conform to the quality requirements of AASHTO M 29 (ASTM D 1073). Fine aggregate shall be of such gradation that when combined with other required aggregate fractions in proper proportion, the resultant mixture shall meet the gradation required under the composition of mixture for the specific type under contract.
2) Lightweight aggregate If required or permitted by the Special Project Specifications, shall meet the requirements of AASHTO M 195.
6. AGGREGATE FOR BITUMINOUS HOT PLANT-MIX
a. The provisions of 5(a) and 5(b) herein shall apply.
893 AGGREGATE 3
b. The several aggregate fractions for the mixture shall be sized, and blended to meet one of the grading requirements of the Special Project Specifications as specified on the drawings.
7. AGGREGATE FOR COLD PLANT-MIX BITUMINOUS PAVEMENT
a. The provisions of 6(a) and 6(b) herein shall apply.
1) Aggregate for Pavement - The several aggregate fractions for the mixture shall be sized, graded, and combined in such proportions that the resulting composite blend meets one of the grading requirements of the Special Project Specifications as specified on the drawings.
2) Aggregate for Top Dressing
a) The material for the top dressing shall consist of dry sand, stone screenings, or slag screenings meeting the grading requirements of the Special Project
Specifications as specified on the drawings.
b) Lightweight aggregate, if required or permitted by the Special Project
Specifications, shall meet the pertinent requirements of AASHTO M 195.
8. AGGREGATE FOR ROAD MIX BITUMINOUS PAVEMENT
a. Aggregates for road mix bituminous pavement construction shall be crushed stone, crushed slag, or crushed or natural gravel which meet the quality requirements of AASHTO M 62 or M 63 for the specified gradation, except that the sodium sulfate soundness loss shall not exceed 12 percent.
b. When crushed gravel is used, at least 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face. Gradation shall conform to the grading requirements of the Special Project Specifications as specified on the drawings.
c. Lightweight aggregate, if required or permitted by the Special Project Specifications, shall meet the pertinent requirements of AASHTO M 195.
9. AGGREGATE FOR COVER COATS, SURFACE TREATMENTS, AND BITUMINOUS
PRESERVATIVE TREATMENT
a. Aggregates shall meet the quality requirements of AASHTO M 78.
b. When tested in accordance with AASHTO T 182 (ASTM D 1664), aggregate shall have a retained bituminous film above 95 percent.
c. Aggregates which do not meet this requirement may be used for bituminous surface treatments and seal coats provided an approved chemical additive or wetting agent is used to provide a water resistant film.
893 AGGREGATE 4
d. Lightweight aggregate if required or permitted by the Special Project Specifications, shall meet the pertinent requirements of AASHTO M 195.
e. When crushed gravel is used, not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face. Aggregates shall meet one of the grading requirements of the Special Project Specifications.
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