![]() ![]() If the organic impurities exceed the prescribed limits, the aggregates shall be subjected to the test for organic contaminants and producing aĬolor darker than the standard shall be rejected provided that discoloration is due to coal, lignite, or similar discrete particles. Table 2: Deleterious Substance in Fine Aggregate The range of deleterious substance permissible in the fine aggregate as per the ASTM is prescribed in the Table-2 below. Table 1: Sieve Size and Passing Percentage of Aggregates. ![]() The fineness modulus shall not vary more than 0.20. The fineness modulus of the fine aggregate shall be not less than 2.3 and more than 3.1. The fine aggregate shall not pass 45% from a single sieve and retained on the next consecutive sieve as shown in table-1. The fine aggregate shall consist of natural sand, manufactured sand, or a combination thereof.
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