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based on the parent rock. (e) 5.0 for concrete not subject to surface abrasion. (f) Fine aggregate conforming to M 6 may be used if the lightweight concrete does not exceed the maximum unit weight specified in the contract Documents.Acton Rock Crusher Ruins 7-15-2015 Southwest of the junction of Soledad Canyon Canyon Road and Crown Valley Road are the ruins of the Acton Rock Crusher,
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