Study on effect of additives on cement slurry at low temperature

Abstract:

In order to solve the problem that common Portland cement (P. O42.5) or concrete can not cure smoothly in low temperature environment, the basic performance test of Portland cement is carried out, and the curing accelerator and the superplasticizer are used to adjust the performance of cement to find out the proper adjustment plan. The strength data of cement slurry and cement paste before and after adjustment are compared, and the results show that the adjustment make-up of 10% LC curing accelerator and 2‰ JSS super plasticizer can improve the fluidity, setting time, release rate of hydration heat, calculus rate and early strength of cement paste. The research results can provide some reference for concrete construction under low temperature conditions.

Key words:low temperature; cement slurry; cement slurry fluidity; setting time; cement strength; hydration heat