Strengthen the control of concrete production, transportation and construction processes

When producing concrete, the mixing time for strength levels below C40 should not be less than 35 seconds, and the mixing time for strength levels C40 and above should not be less than 1 minute. If there are special requirements, the mixing time needs to be extended if fiber is mixed. Stir for time until evenly mixed.
When using a mixer truck for transportation, it is necessary to observe the wear and tear of the mixing blades to ensure that the homogeneity meets the requirements. During transportation, maintain 3 to 6 r/min. Before unloading, keep the mixer truck rotating quickly for 1 to 2 minutes. Only after mixing is even, can the material be unloaded.
During the pouring construction process, the homogeneity of the concrete in the feed hopper must be maintained and continuous construction must be maintained when using pump trucks to transport it; when using bucket trucks to unload, the road should not be too far to avoid long-distance vibration and sinking of the slurry. Sand and gravel layered. When using a chute, the height should not exceed 5m. When the structure is poured and vibrated, the thickness should not exceed 300mm. Massive concrete is poured in layers. Through production and mixing time, transportation and construction control, concrete bleeding and segregation can be effectively controlled. </p