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 T 21M/T 21. Comparison is made between compressive strengths of mortar made with washed and unwashed fine aggregate.
AASHTO T 71-08 (2021)
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Standard Method of Test for Effect of Organic Impurities in Fine Aggregate on Strength of Mortar (ASTM Designation: C87/C87M-10)
American Association of State Highway and Transportation Officials , 2008