First of all, the choice of raw material quality is accurate.
1. Aggregate: coarse aggregate and coarse aggregate must be sampled and tested as required. Only use certified products. Coarse aggregate shall consist of gravel or crushed pebbles of moderate grade, good texture and uniform texture. The index of coarse aggregate must meet the requirements of relevant standards and specifications, and the mud content and mud content must be controlled and tested in time. If the inspection fails, you are not allowed to enter the unloading truck.
2. Cement: the cement must be sampled according to the regulations. Each batch of cement shall be tested for standard consistency and temperature. If you have any questions about the quality, do not enter the warehouse and continue to test other indicators. Qualified cement is strictly forbidden to enter the site. It is strictly forbidden to use unheated hot cement directly in the project.
3. Mineral mixture: test according to relevant standards and specifications. Laboratories need to keep up with changes in the quality of mineral mixtures. When the mineral mixture enters the site, its water demand, ignition loss and fineness must be tested. The products that pass the inspection can be stored, so please pay attention to the preliminary test. Compare the results to determine quality fluctuations and check the quality of the project.
4. Admixtures: check and test the admixtures after entering the site. Check whether the mixed package is marked with: product name, model, net content or volume, manufacturer name, production date, factory number. Ensure that the items on the package are in accordance with the product specifications and the manufacturer's certificate, and that the deposits have not settled in the liquid mixture and have not expired.
Secondly, the specific mixing ratio should be correct.
Third, the weighing system of mixing station must be accurate.