AASHTO M 140-2018 Standard Specification for Emulsified Asphalt.pdf
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1、Standard Specification for Emulsified Asphalt AASHTO Designation: M 140-18 Technical Section: 2a, Emulsified Asphalts Release: Group 3 (August) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001TS-2a M 140-1 AASHTO Stand
2、ard Specification for Emulsified Asphalt AASHTO Designation: M 140-18 Technical Section: 2a, Emulsified Asphalts Release: Group 3 (August 2018) 1. SCOPE 1.1. This specification covers 15 grades of emulsified asphalt for use in pavement construction in the manner designated. Note 1See M 208 for speci
3、fications covering cationic emulsified asphalt and M 316 for specifications covering polymer-modified emulsified asphalt. 1.2. The values stated in SI units are to be regarded as the standard. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 208, Cationic Emulsified Asphalt M 316, Polymer-Modified E
4、mulsified Asphalt R 5, Selection and Use of Emulsified Asphalts R 66, Sampling Asphalt Materials R 77, Certifying Suppliers of Emulsified Asphalt T 49, Penetration of Bituminous Materials T 50, Float Test for Bituminous Materials T 51, Ductility of Asphalt Materials T 59, Emulsified Asphalts T 111,
5、Mineral Matter or Ash in Asphalt Materials T 382, Determining the Viscosity of Emulsified Asphalt by a Rotational Paddle Viscometer 3. REQUIREMENTS 3.1. Upon receipt, refer to T 59 for the proper protocol for conditioning the emulsified asphalt prior to mixing and testing. The emulsified asphalt sho
6、uld appear to be homogeneous after thorough mixing. Complete testing of sample for emulsified asphalt properties within 14 days of the sample date. Complete testing for emulsified asphalt residue properties within 30 days of the emulsified asphalt sample date. Note 2Dilution of the emulsified asphal
7、t to aid in the field application of the material should not occur without approval of the buyer. 3.1.1. If the emulsified asphalt appears to be inhomogeneous after reconditioning and mixing according to T 59, discard and resample for testing if required by the buyer. 2018 by the American Associatio
8、n of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-2a M 140-2 AASHTO Note 3When emulsified asphalts (in particular, rapid-setting grades) are held in containers at ambient temperature for an extended period, emulsified asphalt drople
9、ts can coalesce, leading to unrepresentative changes in emulsified asphalt liquid properties. Coalescence can also lead to sieve development and, ultimately, destabilization of the emulsified asphalt. This can be noted as overall inhomogeneity of the sample even after careful reheating and mixing up
10、on receipt. 3.1.2. If the sample was subjected to freezethaw cycling prior to receipt, discard and resample for testing. If the emulsified asphalt was frozen at any time before testing, results for emulsified asphalt liquid properties such as viscosity, sieve, and settlement will be invalid. Note 4E
11、mulsified asphalt residue properties can also be affected when the liquid emulsified asphalt to be recovered shows signs of inhomogeneity or has been subjected to freezethaw cycling. Note 5If the emulsified asphalt appears inhomogeneous or is suspected of having been subjected to freezethaw cycling
12、prior to testing and a second, representative sample cannot be obtained, actual emulsified asphalt performance at time of construction should be reviewed. If sample integrity issues persist, consider deploying R 77 so that liquid emulsified asphalt samples are taken directly from heated storage tank
13、s and are evaluated soon after cooling directly to the required test temperature. 3.2. Emulsified asphalt shall conform to the requirements in Table 1 for the type and grade specified. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is
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