Water reducing agent refers to the concrete slump under the same conditions, can reduce mixing water consumption; Or in the concrete mix ratio and water consumption are the same, can increase the concrete slump admixture. According to the size of water reduction rate or slump increase range, it is divided into two categories: ordinary water reducing agent and high efficiency water reducing agent. In addition, there are compound water reducing agent, such as air reducing agent, not only has the effect of reducing water, but also has the effect of air; Early strength water reducer, not only has the effect of reducing water, but also has the effect of improving early strength; Retarding water reducing agent, at the same time has the function of delaying the setting time and so on.
1. The main function of water reducing agent.
(1) The liquidity is significantly improved when the mix ratio is unchanged.
(2) fluidity and cement dosage unchanged, reduce water consumption, reduce water cement ratio, improve strength.
(3) Keep the fluidity and strength unchanged, save the amount of cement, reduce the cost.
(4) High strength and high performance concrete.
2. Mechanism of action of water reducing agent. The action mechanism of water reducing agent to improve the fluidity of concrete mixture mainly includes two aspects: dispersion and lubrication
