AASHTO T 85-21 PDF Download

AASHTO T 85-21 is a standard method used for determining the specific gravity and absorption of coarse aggregates. Specifically, it provides guidelines on how to express the specific gravity of these aggregates as bulk specific gravity, bulk specific gravity (saturated-surface-dry), or apparent specific gravity. The values obtained are based on the aggregate being soaked in water for a period of 15 to 19 hours. It is important to note that this method is not applicable to lightweight aggregates. Additionally, it states that AASHTO T 85-21 is equivalent to ASTM C 127-12, meaning that it is in alignment with the specifications and requirements outlined in ASTM C 127-12. This information ensures consistency and compatibility when conducting specific gravity and absorption tests on coarse aggregates.