摘要
文章选用3个不同厂家生产的高标号水泥以不同掺量掺入低标号水泥内制备胶砂试件,通过不同试件的72h、28d抗折强度和抗压强度试验结果对高标号水泥掺量与强度提升率之间的对应关系进行研究。研究表明,高标号水泥的掺加对低标号水泥强度有促进作用,强度提升率在高标号水泥的掺量介于20%~40%时增长最快,且高标号水泥掺量对72h强度提升率的影响比28d强度提升率的影响更大。
In this paper,high-grade cement produced by three different manufacturers is mixed with low-grade cement in different mixtures to prepare cement-sand specimens.The corresponding relationship between high-grade cement content and strength lifting rate is studied through the bending strength and compressive strength test results of diferent specimens at 72h and 28d.The results show that the addition of high-grade cement has a promoting effect on the strength of low-grade cement,and the strength lifting rate increases the fastest when the content of high-grade cement is between 20%and 40%,and the effect of high-grade cement content on the strength lifting rate of 72h is greater than that of 28d.
作者
雷君霞
LEI Junxia(Gansu Provincial Transportation Research Institute Group Co.,Ltd.,Lanzhou 730015,China;Gansu Provincial Engineering Laboratory for Road Materials,Lanzhou 730015,China)
关键词
水泥
掺量
强度
增长率
cement
content
strength
growth rate
