gravel or crushed stone under concrete

Ask the Builder | Concrete slab needs quality self ... What type of stone would be best for filling a cavity under a planned two-car garage addition? It is approximately 7 feet deep. The local concrete supplier sells recycled concrete for a really ... 154 STONE (CRUSHED)1 - USGS Crushed stone substitutes for roadbuilding include sand and gravel, and iron and steel slag. Substitutes for crushed stone used as construction aggregates include construction sand and gravel. Aggtrans - Crushed Stone | Sand and Gravel | Mulch For over 30 years, Aggtrans has been a leading supplier of crushed stone, sand, gravel, mulch, ball diamond mix, boulders, clay, rocks and recycled materials in Maryland, Washington DC, ia, Pennsylvania and Delaware.    Read More