RECLAMATION OF LEFTOVER CONCRETE

摘要

A method and apparatus for recovering concrete returned to the plant by delivery truck empties the delivery trucks into hoppers that dispense the so delivered left over concrete into molds designed to produce blocks of concrete suitable for regrinding into aggregate. The molded blocks are held in the molds for sufficient time to set the concrete for grinding before the blocks are separated from the molds. The moldedblocks are then delivered to a grinding station where they are ground into aggregate of selected size for return to the concrete mixing operation. Any water that separates during the molding operation is subject to a settling operation to settle fine particles and the decanted water is then stored in a suitable reservoir for reuse, for example, in washing out the trucks.