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AASHTO T71 – Standard Method of Test for Effect of Organic Impurities in Fine Aggregate on Strength of Mortar


This test method covers the determination of the effect on mortar strength of the organic impurities in fine aggregate, whose presence is indicated by tests with AASHTO T21. Comparison is made between compressive strengths of mortar made with washed and unwashed fine aggregate.


fine aggregate; mortar strength; organic impurities

AASHTO T71 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing tests using the AASHTO T71 standard.

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