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Ten precautions for the application of admixtures in commercial concrete

Ten precautions for the application of admixtures in commercial concrete

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  • Time of issue:2019-08-09 14:48
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Ten precautions for the application of admixtures in commercial concrete

Information
1. Sodium polyphosphate and other retarders should be strictly controlled in dosage, and should not be excessive;
2. There should be a metering container for the admixture, and it must not be mixed out of control;
3. Wood calcium is used as a retarder, and the general dosage should not exceed 0.25% of the cement amount;
4. Chloride salt type antifreeze should not be used in the construction of reinforced concrete structures in winter;
5. When using pumping agent for ready-mixed concrete, the compatibility test of cement and admixture should be done in advance, and cement prepared with anhydrite and phosphogypsum should not be used;
6. The admixture of self-compounding formula must be tested in advance, especially the interaction between amine antifreeze and calcium nitrate;
7. The formula of concrete pumping agent should be adjusted seasonally, and the dosage of sugar should be strictly controlled;
8. The operator of the mixing station should pay attention to observe the change of slump;
9. The ready-mixed concrete should adopt moisturizing curing (water film curing);
10. Concrete with expansion agent must be wet cured as soon as possible.
 
 

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