Strictly follow the concrete mix proportion sheet provided by the laboratory and approved by the supervisor for batching, and it is strictly prohibited to change the concrete mix proportion without authorization.
The construction unit must use accurate weighing equipment for production and regularly check the weighing equipment according to the instructions of the supervisor.
We insist on weighing each plate of sand and gravel, and do not advocate the volumetric method of marking with small carts.
In addition, regular spot checks should be conducted on mixing time, feeding sequence, concrete slump, and whether the concrete is segregated.
In larger projects, construction units should use computer-measured mixing plants to reduce human factors and ensure the design strength of concrete.
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