j9九游会首页登录 Vitamin C contains a large amount of functional carboxyl and hydroxyl groups with strong polarity. These groups make cement particles disperse and fluid through adsorption, dispersion, wetting and other surface activity, and also increase the workability of fresh concrete by reducing the frictional resistance between cement particles and decreasing the free energy at the interface between cement particles and water. After compounding with high efficiency carboxylic acid water reducing agents, a smaller amount of our product can reach the same effect. This process can also provide it with good compatibility with other admixtures.