ASTM D8639/D8639M-26

1.1 This test method covers the procedures for conditioning asphalt mixtures in fuel and measuring their resistance to fuel degradation. The method describes the determination of fuel-induced mass loss (FML) using cylindrical laboratory-compacted asphalt mixture specimens. Fuel-conditioned mixtures may be further evaluated for mechanical properties; the measurement of fuel-induced tensile strength ratio (TSR_f) and Cantabro mass loss (CML) are described in Appendix X1 and Appendix X2, respectively.

1.2 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.

1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those used in tables and figures) shall not be considered requirements of the standard.

1.4 Since a complete precision and bias statement for this standard has not been developed, the test method is to be used for research and informational purposes only. Therefore, this standard should not be used for acceptance or rejection of a material for purchasing purposes.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

5.1 This test method can be used to test asphalt mixtures in conjunction with mixture design testing to determine the potential for fuel spill damage. This assessment is particularly important for airfield pavements that are subject to fuel spills where fuel damage could lead to surface degradation and the generation of foreign object debris (FOD). This test method can also be used to evaluate and design asphalt mixtures used in other pavement applications that frequently suffer from oil and fuel spill distresses (for example, bus lanes, truck stops, fueling centers).

5.2 This test method is used to measure the fuel resistance of asphalt mixtures through FML as a result of fuel conditioning. Because damage to asphalt mixtures may present itself in forms that do not result in a direct loss of material (for example, reduction in adhesion quality between aggregate and asphalt binder), some specifying agencies may also wish to determine mechanical properties of fuel-conditioned mixtures. Appendix X1 and Appendix X2 provide information on how to modify Test Methods D4867/D4867M and D6931 to measure TSR_f or AASHTO T 401 to measure CML.