DENSITY AND RELATIVE DENSITY OF SOLID PITCH AND ASPHALT: ASTM D71
This test method determines the relative density by water displacement of hard pitches and asphalts with softening points above 70° C. Whenever possible homogenous natural fragments of sample free of cracks should be used. The use of cast cubes is not recommended due to the difficulty avoiding incorporation of air bubbles.
TEST SUMMARY
The sample is suspended from a thin wire and weighed, first in air, then submerged in water at 25° C. The relative density is calculated from these weights.
TEST PRECISION
This test method has a repeatability of 0.005 and a reproducibility of 0.007.
