concrete crusher online help chat sand making concrete quarry

concrete crusher online help chat sand making concrete quarry

Otherwise, what is under a slab depends on the ground you are pouring the slab on, some soils don't need anything, some need a lot of help. From American Concrete Institute ACI360R-10 Guide to Design of Slabs-on-Ground 4.5 Design of Slab-support system 4.5.1 General After subgrade soils have been classified, the general range of K values can ...

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