ASTM D2172/D2172M-17 pdf free download.Standard Test Methods for Quantitative Extraction of Asphalt Binder from Asphalt Mixtures.
1 .1 These test niethods cover the quantitative determination of asphalt hinder content in asphalt mixtures and pavement samples. Aggregate obtained by these methods may he used for sieve analysis using Test Method D5444. This test is not appropriate for testing asphalt mixtures containing coal tar.
1.2 Asphalt binder may be recovered using Test Method D 1856. Practice D54041D5404M, or Practice D7906.
1.3 Units — The values stated in either SI units or inch- pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents:
therefore. each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1 .5 This standard does not puiport to address all 1 the safety concerns, if an associated with its use. It is the responsibility f the user of this standard to establish appropriate safrtv iizd health practices and deterimine the application of regulatory limitations prior to use. Specific hazards are given in Section 7.
Note 1—The results obtained by these test methods may be affected by the age of the material tested, with older samples tending to yield slightly lower asphalt binder content. Best quantiLative results arc obtained when the test is made on mixtures and pavements shortly after their preparation. It is difficult to remove all the asphalt when some aggregates are used and some chlorides may remain within the mineral matter affecting the measured asphalt Content.
3. Summary of Test Methods
3.1 The asphalt mixture is extracted with trichioroethylene (TCE), normal propyl bromide (nPB), or methylene chloride using the extraction equipment applicable to the particular method. The asphalt hinder content is calculated by difference from the mass of the extracted aggregate.The asphalt binder content is expressed as mass percent of moisture-free mixtures.
4. Significance and Use
4.1 All of these test methods can be used for quantitative determinations of asphalt binder in asphalt mixtures and pavement samples for specification acceptance, service evaluation, control, and research. Each method prescribes the solvent or solvents and any other reagents that can be used in the test method.ASTM D2172/D2172M pdf download.