Mobile mixing plants are responsible for the strength of the concrete. The tester adjusts the construction mix ratio and must calculate based on the moisture content of the gravel on duty. When the weather is rainy or the weather changes greatly, the frequency of moisture content detection must be increased to ensure that the water-cement ratio of the concrete meets the requirements; The additive is provided by the supplier with a product certificate, and the mobile mixing station material room is sampled and submitted for inspection. Sand and stone shall be sampled and sent for inspection once at the same place of origin and the same specification not larger than 400m3. For sand and stone materials in question, samples shall be submitted for inspection at any time and the mixing station laboratory shall be notified. All raw materials must be inspected before they can be used, and the unqualified raw materials should be cleaned out in time.
As for the concrete mix ratio of the mobile mixing station, before the construction of each work area, the mobile mixing station is notified according to the 2.1.3 plan dispatching management procedure, and the quantity, strength level, location, location, and construction technology of the concrete required are provided. Before the mobile mixing station produces concrete, it is necessary to call the user again to confirm the correctness of the concrete parameters. The mobile mixing station mixes the materials strictly according to the mix ratio. In principle, manual operation of the valve is not allowed. The input and modification of the mixing ratio of the mixing building can only be operated by the testers of the mobile mixing station, and no one else can adjust it. The maintenance personnel of the mobile mixing station shall strengthen the inspection and maintenance of the mixing equipment, and regularly inspect the measuring and timing device.