Why Sand Under Concrete
Aug 19, i’m preparing to pour a finish concrete foor, slab on grade. the structural plans call for 4″ compacted gravel base, insul-tarp vapor barrier, 2″ of sand and 4″ of concrete. what purpose other than a base for the concrete does the sand serve? why use it when yopu have thick.Base course roads. the conclusion was that a properly done crushed stone layer could be used for pavements with a bearing capacity of up to 50 million standard axles (misa) repetitions. it is exceptionally water resistant and the only unbound road building.