摘要
矿渣主要是一种填充料或者代替部分硅酸盐水泥熟料加工成矿渣水泥,同时也是碱激发水泥的重要材料.通过改变粉煤灰、水玻璃、偏高岭土、硅灰以及石灰的掺量,评价其对碱矿渣混凝土和易性及立方体抗压强度的影响.试验结果表明:粉煤灰及水玻璃的掺入能够改善碱矿渣混凝土的和易性,其中粉煤灰改善效果更为显著,硅灰、石灰以及偏高岭土的掺入会降低碱矿渣混凝土和易性;粉煤灰、石灰及偏高岭土的掺入会降低碱矿渣混凝土28 d抗压强度,其中偏高岭土对强度影响最为显著,水玻璃、硅灰的掺入能够增强碱矿渣混凝土28 d抗压强度,其中水玻璃对强度的改善效果较为显著.
Slag is mainly a kind of filler or a substitute for Portland cement clinker to process slag cement. It is also an important material for alkali-activated cement. This paper evaluates the influence of fly ash,sodium silicate,metakaolin,silica fume and lime on the workability and cubic compressive strength of alkali slag concrete. The test results show that the mixing of fly ash and sodium silicate can improve the workability of alkali slag concrete,especially fly ash. The mixing of silica fume,lime and metakaolin can reduce the workability of alkali slag concrete.The mixing of fly ash,lime and metakaolin can reduce the 28 day compressive strength of alkali slag concrete,of which metakaolin has the greatest impact on the strength. Significantly,the addition of sodium silicate and silica fume can enhance the 28 day compressive strength of alkali slag concrete,and the effect of sodium silicate on the strength improvement is more significant.
作者
李雪萍
LI Xueping(Henan Chemical Research Institute Co. Ltd.,Zhengzhou 450000,China)
出处
《河南科学》
2019年第9期1422-1426,共5页
Henan Science
基金
国家青年科学基金资助项目(51408553)
河南省重点科技攻关计划项目资助课题(152102210033)
关键词
配合比
碱矿渣混凝土
流动性
抗压强度
mix proportion
alkali slag concrete
mobility
compressive strength
