At present, concrete admixtures have gradually become an indispensable part of concrete. The reason is that they can save energy, improve the quality of concrete building materials and improve the construction performance of concrete. Their characteristics can be summarized as follows:

1. Improve construction conditions and reduce physical labor intensity, which is conducive to mechanized operation. It is required that high-quality concrete works can be completed on site. For example, adding appropriate water reducing agent to concrete can prepare pumped flowing concrete, etc. 2. Reduce the curing time or shorten the steam curing time of the prefabricated component factory, so as to remove the formwork at the construction site in advance, accelerate the turnover of the formwork, and release and shear the prestressed reinforced concrete reinforcement in advance. 3. Improve or improve the quality of concrete. If air entraining water reducing agent is added into concrete, it can improve the strength of concrete, increase the durability, compactness, frost resistance and impermeability of concrete, and improve the drying shrinkage and creep performance of concrete. Adding rust inhibitor in concrete can improve the corrosion resistance of reinforcement in concrete. 4. Water reducing agent can properly save water without adverse impact on concrete quality. 5. Composite admixture can improve the mixing performance of concrete mixture and reduce the energy consumption in the process of mixing, tamping and forming; Avoid steaming or shorten steaming time, which can save energy consumption.