According to the water content of the concrete shipped by the concrete mixer truck, there are three types of mixer trucks: wet type, dry type and semi-dry type.
Most of the domestic wet concrete mixer trucks are used, which can transport concrete produced by mixing plants (stations) or aggregates (sand, stones), cement and water mixed in proportions. Mixing to prevent initial setting and segregation of concrete during transportation. However, the time from production to pouring of concrete should generally not exceed 1.5h to avoid concrete coagulation. Therefore, in the case of longer distance transportation, it is necessary to use dry and semi-dry material mixer trucks for transportation.
The dry material mixer truck can directly load the dry aggregate and cement into the mixing drum of the truck according to the proportion. During the transportation process, the dry material in the drum is mixed. When the vehicle is about to arrive at the construction site or add water at the construction site Complete mixing of concrete.
The aggregate and cement in the concrete shipped by the semi-dry mixer truck are also prepared according to the proportions and contain a certain amount of water, but the water content does not meet the pouring requirements. Add water and stir.
