1、Standard Specification for Reclaimed Asphalt Shingles for Use in Asphalt Mixtures AASHTO Designation: MP 23-151American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-2d MP 23-1 AASHTO Standard Specification for Reclaimed
2、Asphalt Shingles for Use in Asphalt Mixtures AASHTO Designation: MP 23-1511. SCOPE 1.1. This specification covers reclaimed asphalt shingle material used in asphalt mixtures. The use of reclaimed asphalt shingles in other recycling applications such as hot-in-place pavements, and cold recycled pavem
3、ents is not included in this specification. Note 1Refer to PP 78, “Design Considerations When Using Reclaimed Asphalt Shingles (RAS) in Asphalt Mixtures” for information on design considerations, determining shingle aggregate gradation, and the grade of the binder. 2. REFERENCED DOCUMENTS 2.1. AASHT
4、O Standards: PP 78, Design Considerations When Using Reclaimed Asphalt Shingles (RAS) in Asphalt Mixtures T 2, Sampling of Aggregates T 27, Sieve Analysis of Fine and Coarse Aggregates 3. TERMINOLOGY 3.1. Definitions: 3.1.1. aggregatecoarse and fine aggregate introduced into asphalt mixtures that is
5、 exclusive of the shingle aggregate. 3.1.2. coarse and fine aggregatesee T 27 for definitions. 3.1.3. manufactured shingle wasterejected asphalt shingles or shingle tabs that are discarded in the manufacturing process of new asphalt shingles. 3.1.4. postconsumer asphalt shinglesasphalt shingles that
6、 are removed from the roofs of residential dwellings or commercial buildings. Postconsumer asphalt shingles are often called “tear-off” shingles. 3.1.5. reclaimed asphalt shingles (RAS)manufactured shingle waste or postconsumer asphalt shingles that have been processed into a product that meets the
7、requirements of this standard. 3.1.6. RAS asphalt binderasphalt binder that is present in the reclaimed asphalt shingles. 3.1.7. RAS aggregatemineral granules, sand, or other mineral matter present in the reclaimed asphalt shingles, excluding the shingle fiber content. 2015 by the American Associati
8、on of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-2d MP 23-2 AASHTO 3.1.8. RAS fiberglass felt, paper felt, foil, and fabrics or films used as the structural basis of asphalt shingles. 4. SOURCES AND SAMPLING 4.1. Reclaimed asphalt
9、shingles may be derived from either manufactured shingle waste or from postconsumer asphalt shingles (Note 2). Note 2Various state and local regulations may be applicable to the use of asphalt shingle material. The user of this specification is advised to contact state and local transportation depar
10、tments and environmental agencies to determine what additional requirements may be necessary. 4.2. Postconsumer asphalt shingles shall be processed prior to use to meet the requirements of this specification and shall consist of asphalt roll roofing, cap sheets, and shingles, including underlayment,
11、 only. Roofing debris, including coal tar epoxy, rubber materials, or other undesirable components, shall not be included or used in RAS from postconsumer asphalt shingles. Postconsumer asphalt shingles shall be certified as conforming to local requirements concerning asbestos. 4.3. Manufactured shi
12、ngle waste and postconsumer asphalt shingles shall not be blended together for the production of asphalt mixtures. 4.4. Reclaimed asphalt shingle samples collected and analyzed for the purpose of identifying the properties of reclaimed asphalt shingles as defined in this specification shall be repre
13、sentative of the reclaimed asphalt shingle material that will be used in the full production of asphalt mixtures. 5. GRADATION OF RECLAIMED ASPHALT SHINGLES 5.1. Reclaimed asphalt shingles shall be processed so that 100 percent passes the 9.5 mm (3/8in.) sieve. Gradation requirements apply to proces
14、sed and dry shingle material prior to the extraction of the asphalt binder. Note 3The asphalt mixture supplier may choose to uniformly blend fine aggregate, powdered zeolites, or reclaimed asphalt pavement (RAP) with the reclaimed asphalt shingles as a method of preventing the agglomeration of recla
15、imed asphalt shingle particles. Any amount of fine aggregate, RAP, or other material added must be considered in the final gradation of the asphalt mixture. 6. DELETERIOUS REQUIREMENTS 6.1. Reclaimed asphalt shingles shall not contain extraneous waste materials and shall be essentially nail-free. Ex
16、traneous materials such as metals, glass, rubber, soil, brick, paper, wood, and plastic shall not exceed 1.5 percent of the total mass measured on material retained on and above the 4.75-mm (No. 4) sieve. Nonmetallic extraneous material shall not exceed 0.5 percent of the total mass measured on mate
17、rial retained on and above the 4.75-mm (No. 4) sieve. 6.2. Reclaimed asphalt shingles shall contain less than the maximum percentage of asbestos fibers based on testing procedures and frequencies established in conjunction with the specifying jurisdiction and state or federal environmental regulator
18、y agencies. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-2d MP 23-3 AASHTO 7. METHODS OF SAMPLING AND TESTING 7.1. Sample and test the reclaimed asphalt shingles using the following AASHTO standard
19、s, except as otherwise provided in this specification: 7.1.1. Sampling according to T 2. 8. KEYWORDS 8.1. Aggregate; gradation; manufactured shingle waste; postconsumer asphalt shingles; RAS aggregate; RAS fiber. 1This provisional standard was first published in 2014. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
