Views:8 Author:Site Editor Publish Time: 2021-07-19 Origin:Site
The role of the mixer truck is to transport the concrete from the pumping station to the construction site. During the transportation, the mixer drum will always be kept rotating to ensure that the carried concrete will not solidify. After the concrete is transported, the inside of the mixing drum is usually washed with water to prevent the residual concrete from hardening and occupying space, so that the volume of the mixing drum becomes less and less.
According to the moisture content of the concrete loaded by the concrete mixer, there are three types of mixer trucks: wet material, dry material and semi-dry material. Most domestically use wet concrete mixer trucks, which can load concrete produced by mixing plants (stations) or aggregates (sand, stones), cement and water mixed in proportions. During transportation,
Continuously stir the wet material slowly to prevent the initial setting and segregation of the concrete during transportation. However, the time from production to pouring of concrete should generally not exceed 1.5h to prevent concrete from setting. So, transported over longer distances
In this case, it is necessary to use dry and semi-dry mixing trucks for transportation. The dry material mixing truck can directly load the dry aggregate and cement into the mixing drum of the truck according to the ratio. During the transportation, the dry material in the drum is mixed.
The vehicle will arrive at the construction site or add water to complete the concrete mixing at the construction site. The aggregate and cement in the concrete transported by the semi-dry mixer truck are also prepared according to the ratio and contain a certain amount of water, but the water content does not meet the pouring requirements, so it needs to be before the vehicle will reach the construction site or at the construction site Add water and stir.