ASTM D2172/D2172M-17e1 PDF Download

The ASTM D2172/D2172M-17e1 standard provides guidelines and procedures for the quantitative determination of asphalt binder content in asphalt mixtures and pavement samples.

The standard specifies that these test methods can be used for various purposes, including specification acceptance, service evaluation, control, and research. Each test method within this standard outlines the specific solvents, reagents, and procedures to be followed.

The standard also provides additional information and guidance for further testing and analysis of the asphalt mixture. This may include sieve analysis on the extracted aggregate using Test Method D5444, or recovering the asphalt binder from the solution for property testing using Test Method D1856 or Practice D5404/D5404M or Practice D7906. It is important to remove all mineral matter from the effluent when recovering the asphalt binder for property testing.

The accuracy and reliability of the results obtained from this standard are dependent on the competence of the personnel performing the procedure and the proper calibration and maintenance of the equipment used. While complying with the criteria of Specification D3666 ensures competent and objective testing/sampling/inspection, it does not guarantee reliable results. Users are encouraged to follow the suggestions of Specification D3666 or a similar acceptable guideline to control and evaluate the influencing factors.

The standard also includes notes and footnotes that provide explanatory material, which should not be considered as requirements of the standard. Note 1 highlights that the age of the material tested may impact the results, with older samples potentially yielding slightly lower asphalt binder content. It also mentions the difficulty of completely removing all asphalt when certain aggregates are used, and the presence of chlorides in the mineral matter, which can affect the measured asphalt content.