Along with the portable RAP King drum mixer system, [Jason Papich]'s plant includes four 8' ? 12' cold feed bins and a RAP bin. The cold feed bins are mounted on a chassis for easy portability and rapid setup. The unit includes an integral collecting conveyor that runs underneath the aggregate bins. The conveyor includes an inclined extension that can be folded into a retracted position for travel. Virgin aggregate is carried by the unit's collecting conveyor to a scalping screen.