4111.01DESCRIPTION
Natural sands resulting from disintegration of rock through erosional processes. Acquire mineral aggregate from an approved source as described in Materials I.M. 409. Use Class L fine aggregate in Class L concrete mixtures as specified in Materials I.M. 529.
4111.02GRADATION
Meet the requirements for Gradation No. 1 of the Aggregate Gradation Table, Article
4109.02. No more than 45% is to pass one sieve and be retained on the sieve with
the next higher number when the fine aggregate is sieved through the following sieves: No. 4, No. 8, No. 16, No. 30, No. 50, and No. 100.
4111.03QUALITY
Meet the requirements of Table 4111.03-1:
Intermediate Aggregate for Portland Cement Concrete
4112.03
Table 4111.03-1: Test Limits and Methods Fine Aggregate Quality Test Limits Test Method Shale and Coal 2.0% (maximum) Materials I.M. 344 Mortar Strength
5200 psi (minimum)
Iowa DOT Materials Laboratory Test Method No. 212