The admixture used in concrete production is often equipped with delay coagulation, air diversion and other components, the use of admixture to adjust the work of fine sand concrete, should pay attention to the increase of delay coagulation, air diversion components of the adverse impact on concrete. Especially in the event of a sudden drop in temperature, we should pay attention to the prevention of concrete condensation time process due to high delay component. The increase of gas content will also result in the reduction of concrete strength.
1. Understand the types and components of the admixture used, and determine the amount of admixture through the test. It is strictly prohibited to blindly improve the amount of admixture to meet the working practice of concrete without the test;
2 according to the weather changes, timely adjustment of the amount of admixture, control of concrete setting time, gas content change;
3. Pay attention to the compatibility of admixture and concrete raw materials, different kinds of admixture should be fully tested before mixing, not blind mixing;
4. Add the concrete admixture should be evenly mixed, and ensure enough mixing time.
