EFFECT OF CALCIUM NITRITE ON THE STRENGTH OF HIGH SLAG CEMENT WITH DEFFERENT GYPSUM AND CEMENT CONTENT

Abstract

It is known that the strength development of High blast furnace slag （BFS） cement varies greatly depending on the amount of cement （OPC） blended. In this study, we investigated the effect of the combined use of gypsum （Gyp） and calcium nitrite （CN） on the strength development of High BFS cement with different OPC content. As a result, High BFS cement with Gyp15％＋CN2％ added at OPC1-3％ or Gyp1％＋CN2％ added at OPC30-50％ could obtain strength equal to or higher than that of OPC and blast furnace cement type B. In addition, we found the possibility of strength control of High BFS cement by optimizing Gyp and CN addition depending on OPC contents.