Section 4111. Class L Fine Aggregate for Portland Cement Concrete
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.
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 (4.75 mm, 2.36 mm, 1.18 mm, 600 µm, 300µm, and 150 µm).
Meet the requirements of Table 4111.03-1:
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Table 4111.03-1: Test Limits and Methods |
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Fine Aggregate Quality |
Test Limits |
Test Method |
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Shale and Coal |
2.0% (maximum) |
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Mortar Strength
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5200 psi (35.9 MPa) (minimum)
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Iowa DOT Materials Laboratory Test Method No. Iowa 212 |