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The use of triisopropanolamine cement grinding aids has good grinding effect and significantly improves the strength of the later period of the cement. The raw material triisopropanolamine is based in China and reduces the cost of cement grinding, and has broad application prospects.
The additive has a good complexing effect in an alkaline environment and can effectively promote the dissolution of dense mineral components in the surface layer of the steel slag. Again, the dissolution rate of the mineral components under the continuous complexation of the polyol amine in the steel slag. Continuous increase, which can increase the hydration rate of steel slag, improve the role of steel slag activity in all ages. The addition amount of the admixture is 0.005%-0.012% by weight of the steel slag, and the activity on the 7th day and the activity on the 28th day can be increased by 11%-15%.
The grinding characteristics of DEIPA in Portland cement grinding were studied. The effect of DEIPA on the grinding process and the comprehensive properties of the powder was investigated. The results showed that DEIPA promoted the grinding process of cement. The grinding time of the cement is shortened; the content of fine particles smaller than 5 μm is reduced, and the particle size distribution is changed. DEIPA increases the particle uniformity and roundness of the grinding sample, improves the agglomeration of the particles, and reduces the angle of repose of the cement powder. The powder refraction angle with 0.015% DEIPA was reduced from 41.5° (reference) to 36.5°.The DEIPA as portland cement admixutres have good advantages in cement grinding and increase cement 28 days strength.