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ASTM C856 – Standard Practice for Petrographic Examination of Hardened Concrete


This practice outlines procedures for the petrographic examination of samples of hardened concrete.

The samples examined may be taken from concrete constructions, they may be concrete products or portions thereof, or they may be concrete or mortar specimens that have been exposed in natural environments, or to simulated service conditions, or subjected to laboratory tests.


aggregates; air voids; alkali-silica reaction; analysis; deterioration; examination; fire effects; hardened concrete; microscopy; paste; petrographic; secondary deposits

ASTM C856 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C856 standard.

Contact us for more information.