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What should be paid attention to in concrete mix proportion
August 12, 2021
concrete mix proportion,workability of concrete,fly ash
The concrete mix proportion is mainly composed of four items: cement consumption, water consumption, sand and stone consumption. The amount of cement determines the amount of cementitious material in concrete; The density of concrete is determined by the amount of sand and stone, material and proportion; The water consumption directly affects the workability of concrete. The proportion of these four items determines the basic strength of concrete.
In addition, fly ash and additives in commercial concrete directly affect the performance of concrete. The influence of fly ash in concrete on concrete is mainly reflected in the following aspects.
1. The use of fly ash can reduce the water consumption and improve the workability of concrete at the same time;
2. The use of fly ash can reduce the hydration heat of concrete, and the function of fly ash in many low hydration heat cements and concrete can not be ignored;
4. The use of fly ash reduces the early strength of concrete, but does not affect the later strength, and even improves the later strength of concrete to a certain extent;
5. The extensive use of fly ash significantly reduces the frost resistance of concrete.
