The initialsettingtime of Portland cement shall not be earlier than 45 minutes, final set time not later than 390 minutes.
硅酸盐水泥的初凝时间不得早于45分钟,终凝时间不得迟于390分钟。
2
The results show that, with the in- crease in CA cement content, the fluidity of MgO-based investment materials decreases and so does the initialsettingtime.
结果表明,随着铝酸钙水泥含量的增加,氧化镁系包埋料的初凝时间缩短,流动性变差;
3
The invention provides a cement product setting accelerating method which can shorten the initialsettingtime of the cement product and enhance the production efficiency.