ASTM D71 Standard Test Method for Relative Density of Solid Pitch and Asphalt (Displacement Method)
1. Scope
1.1 This test method covers the determination of relative density by water displacement of hard pitches and asphalts with softening points above 70°C.
1.2 The relative density of hard pitch and asphalt shall be determined, whenever possible, on homogeneous natural fragments free of cracks. The use of cast cubes is not recommended due to the difficulty of avoiding incorporation of air bubbles.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D61 Test Method for Softening Point of Pitches (Cube-in-Water Method)
D140 Practice for Sampling Bituminous Materials
D4296 Practice for Sampling Pitch
3. Terminology
3.1 Definition:
3.1.1 relative density - the ratio of a given volume of material at 25°C to the weight of an equal volume of water at the same temperature (specific gravity).
