(1) improve the workability of concrete and reduce single water consumption. the strength of concrete is related to the water-cement ratio. reducing the water-cement ratio can increase the strength of concrete, improve the impermeability, frost resistance and durability of concrete and slow n the corrosion of steel bars in concrete.
(2) according to the water-reducing efficiency, water-reducing agents can be divided into ordinary water-reducing agents and high-efficiency water-reducing agents. ordinary water reducing agents require water reduction >5%. commonly used ordinary water-reducing agents include calcium lignosulfonate water-reducing agent. high-efficiency water reducing agents require a water reduction rate >10%. currently commonly used are polyalkyl aryl sulfonates and melamine water reducing agents.
concrete, referred to as "concrete (tóng)": refers to the general name of engineering composite materials that are made of cementitious materials that bind aggregates into a whole. it is mainly used to improve the workability of concrete, reduce water consumption, reduce cement consumption, and use it together with mineral admixtures to greatly improve the impermeability and durability of concrete.
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