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According to the water content of the concrete transported by the concrete mixer truck, there are three types of mixer trucks: wet-type, dry-type and semi-dry-type. Most of the domestic use of wet concrete mixer truck, it can be shipped by the mixing plant (station) produced by the concrete or mixed according to the ratio of aggregate (sand, stones), cement and water, in the transport process, the wet material slowly Stir to prevent the concrete from condensing and segregating during transportation. However, the time from the production to the casting of the concrete should not exceed 1.5 hours, so as to avoid concrete condensation. Therefore, in the case of more long-distance transportation, it is necessary to use dry materials and semi-dry material mixer trucks to transport. The dry-type mixing truck can directly mix the dry aggregate and cement into the mixing drum of the truck according to the ratio. During the transportation, the dry material in the cylinder is stirred, and the vehicle will reach the construction site or add water at the construction site. Complete the mixing of concrete. The aggregates and cement in the concrete transported by the semi-dry mixing truck are also formulated according to the ratio and contain some water. However, the water content does not meet the casting requirements and needs to be reached at the construction site or at the construction site. Add water to stir.
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