Standard Transit Concrete Mixers are in essence trucks, which transport concrete from the plant to job or construction site. At the plant the truck is either filled with dry materials (or aggregates), which go into making concrete and are mixed together during transport or the truck is loaded with Ready Mixed concrete. With the latter process, the aggregates are mixed at the plant, and then loaded onto the truck. The Transit Concrete Mixers function is to maintain the concrete's liquid state, through turning of the drum, to the point of delivery at the construction site.
Transit Concrete Mixers have a drum mixer in which the concrete materials are mixed. Blades attached to the inside of the movable drum do the mixing. The blades are of two helixes rotating in a clockwise and a counter-clockwise direction. Their main purpose is to mix and lift the concrete as the drum rotates. In each rotation, the lifted concrete drops back into the mixer at the bottom of the drum and the cycle starts again. The counter-clockwise rotation causes the material to be lifted by the blades towards the discharge end of the drum. The concrete is then discharged onto chutes to guide the concrete to where it is required at the construction site. If the concrete mixer cannot get close enough to the site, the concrete may be discharged into a concrete pump, which is able to pump the concrete to a precise location.
