Concrete mixing system with cement/water premixer

Details Concrete mixing system with cement/water premixer Concrete mixing system with cement/water premixer

1993-03-23

1994-10-04

Scherbel, David A.

Agitating

Mortar mixer type

Plural mixing chambers

366 38, 366 50, 366172, 366186, 366298, 366321, B28C 514, B28C 534, B28C 704, B01F 708

Patent

active

053520351

ABSTRACT:
A system for mixing cementitious material, liquid and aggregate to form concrete includes a cementitious material measuring device which provides dry cementitious material to an enclosed screw conveyor assembly. The dry cementitious material is thoroughly mixed with a liquid within the screw conveyor to form a flowable slurry without producing external cement dust pollution. The slurry is output by the screw conveyor into a final product mixing chamber where the flowable slurry is mixed together with aggregate to form concrete. The screw conveyor assembly has an in-line input and output, and space-saving diverging/converging conveyor sections, to facilitate the retrofitting of existing concrete mixing plants. The conveyor assembly includes a cement metering function as well as a slurry mixing function. A selectively openable and closable bypass gate permits the dry cementitious material to be sent directly to the final product mixing chamber in the event of conveyor failure.

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