Study on the correlation of key indicators of P.O42.5 cement

Abstract

The development history and social contribution of cement were briefly described. The physical and chemical indexes of P.O42.5 cement were tested according to GB 175-2007 standard. The correlation of coagulation time, strength and chemical index was analyzed. The results showed that the final coagulation time was closely and positively correlated with the initial coagulation time, and the correlation coefficient was 0.9572. The 28-day compressive strength doesn’t have obvious correlation with final setting time, loss on ignition, MgO content and SO3 content.