Abstract: The present disclosure is directed to a continuous concrete proportioning plant of the mobile type movable from job site to job site not requiring extensive site preparation. The primary frame has a compact combination of cement sand and aggregate systems which permits sand and aggregate trucks to be backed onto a three sided hopper for each material which when charged is lifted and tilted toward the center of the machine where it feeds a belt conveyor running longitudinally toward the front of the machine. Each belt system contains a continuous belt weighing device and a totalizer will stop and/or clear the conveyor when a predetermined amount is attained. The sand and aggregate hoppers may be tilted to achieve the best flow rate through metering gates.