Abstract
Organic substances containing hydroxyl group and alcohol amine group were chosen in this paper and the effects of different organic group on powder properties and physical performance of cement pastes were studied using various methods of analysis, such as particle size analysis, fluidness analysis and XRD. The results show that monohydric alcohols have a neglectable aid-grinding effect. For Polyhydric alcohols and ethanol amine, the absorption capacity of the hydroxyl group or amido on the surface of the powder may increase in relation to the increase in groups, which can increase fineness but cannot improve the fluidity. For Diethanolamine and Triethanolamine, the absorption on the powder mainly depends on the hydroxyl group, but the amido has a strong electrostatic repulsive force, so the dispersion of the powder not only comes from high steric hindrance effect, but also the electrostatic repulsive force, which can improve the powder’s dispersity, reduce sieve residue and increase the fluidity. This research paper provides a theoretical guide for the application of grinding aids.
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