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ASTM C127 – Standard Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate


This test method covers the determination of relative density (specific gravity) and the absorption of coarse aggregates.

The relative density (specific gravity), a dimensionless quantity, is expressed as oven-dry (OD), saturated-surface-dry (SSD), or as apparent relative density (apparent specific gravity).

The OD relative density is determined after drying the aggregate.

The SSD relative density and absorption are determined after soaking the aggregate in water for a prescribed duration.


absorption; aggregate; apparent relative density; coarse aggregate; relative density; specific gravity

ASTM C127 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C127 standard.

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