Influencing Factors and Enhancement Methods of Early Strength of Supersulfated Cement

Abstract

Abstract: As an environmentally friendly material, supersulfated cement has many advantages, such as low hydration heat, good corrosion resistance, and high strength in the later stage, but there are some deficiencies such as low strength in the early stage. The research progress of influencing factors and improving ways of early strength of supersulfated cement is summarized, and the future research direction has been prospected in this paper. Slag activity, alkalinity and sulfate concentration are the key factors affecting the early strength, especially alkalinity. There are some technical approaches to improve the early strength, such as selecting the slag with high activity and the gypsum with suitable dissolution characteristics, and using the additives with the function of controlling alkalinity and promoting the dissolution of slag. How to control the alkalinity, and then control the formation rate, morphology and proportion of hydration products, is worthy of being studied in the future.

Key words: supersulfated cement, early strength, slag activity, alkalinity, sulfate concentration

CLC Number:

TV42⁺1.9

CHEN Yu, JI Junrong, ZHOU Zhou, WU Shuanglei, CHEN Huxing. Influencing Factors and Enhancement Methods of Early Strength of Supersulfated Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1413-1419.

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