Experimental Study on a Chlorine Free Composite Cement Grinding Aid

Abstract

Abstract: A chlorine free composite cement grinding aid was studied.The grinding aid does not contain halogen ions which corrode the equipment.It can effectively improve the grinding efficiency of cement,improve the distribution of cement particles and enhance the strength of cement.The new modified alcohol amine was selected as the matrix material of grinding aids,and three kinds of common raw materials with auxiliary materials were used to make small grinding test.The performance of grinding aids was evaluated,and the influence of each component was analyzed.The optimal ratio of each material was determined by range analysis,and the hydration products of cement were characterized by SEM.Compared with the blank sample,the performance of cement is significantly improved by the grinding aid,in which the cement 45 μm sieve residue decreases by 24.0%,3 d compressive strength increases by 3.8 MPa,and 28 d compressive strength increases by 5.4 MPa.And the cement using the grinding aid has better working performance,higher strength and better durability in concrete application.

Key words: cement grinding aid, orthogonal test, grinding effect, mechanical property, durability

CLC Number:

TQ172

CAO Hu, LI Haiyan, CHEN Menglong, DUAN Benhou, GAO Deng, WANG Gan, SONG Liuping, AI Chunhun. Experimental Study on a Chlorine Free Composite Cement Grinding Aid[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 64-70.

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