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Special concrete transport trucks (in-transit mixers) are made to mix concrete and transport it to the construction site. They can be charged with dry materials and water, with the mixing occurring during transport. They can also be loaded from a “central mix” plant; with this process, the material has already been mixed prior to loading. The concrete mixing transport truck maintains the material’s liquid state through agitation, or turning of the drum, until delivery.
The interior of the drum on a concrete mixing truck is fitted with a spiral blade. In one rotational direction, the concrete is pushed deeper into the drum. This is the direction the drum is rotated while the concrete is being transported to the building site. This is known as “charging” the mixer. When the drum rotates in the other direction, the Archimedes’ screw-type arrangement “discharges”, or forces the concrete out of the drum. From there it may go onto chutes to guide the viscous concrete directly to the job site. If the truck cannot get close enough to the site to use the chutes, the concrete may be discharged into a concrete pump, connected to a flexible hose, or onto a conveyor belt which can be extended some distance (typically ten or more meters). A pump provides the means to move the material to precise locations, multi-floor buildings, and other distance-prohibitive locations. Buckets suspended from cranes are also used to place the concrete. The drum is traditionally made of steel but on some newer trucks, fiberglass has been used as a weight reduction measure.
Sinotruck HOWO concrete mixer truck is one of the best-sellers, with all sizes of mixing volume, from 5 up to 16 cubic meters. Engine power goes from 130hp up to 420hp. It plays an important role during the delivery of the ready-concrete to the construction site. A reinforced chassis with multiple pieces of leaf springs suspension enables the truck to operate on all kinds of road conditions, no matter how critical they are. A powerful engine and perfect radiating system stabilize the trucks to work for a long time without stopping and engine overheating. The mixing drum is made from high tensile steel, which makes it durable and reliable. Besides, reducer, motor, and pump come from famous manufacturers, like BONFIGLIOLI, ARK, EATON, REXROTH, PMH, etc.