摘要
通过开展抗压强度、吸水率、抗氯离子渗透性、干缩试验,研究了胶凝材料中粉煤灰含量(10wt%~40wt%)对混凝土力学性能、体积稳定性和耐久性关键参数的影响。结果表明:粉煤灰取代水泥降低了混凝土的早期强度但对后期强度具有一定的提高作用。粉煤灰的加入减小了混凝土的干缩,且掺量较高时对混凝土干缩的抑制效果更显著。粉煤灰能够一定程度上增强混凝土的密实度,降低混凝土的吸水率,增强其抗氯离子渗透性,对耐久性具有增强作用。
By carrying out the compressive strength, water absorption rate, chloride ion permeability and dry shrinkage test, this paper studied the influence of fly ash content of cementing materials on the mechanical properties, volume stability and the durability key parameters of concrete. The test results showed that the fly ash could enhance the density of concrete to a certain extent, reduce the water absorption rate of concrete, strengthen the chloride ion permeability and the durability.
作者
霍建忠
HUO Jian-zhong(Yangquan Branch of Shanxi Road ＆ Bridge Construction Group Co.,Ltd,Yangquan,Shanxi 045000,China)
出处
《山西交通科技》
2018年第3期20-23,共4页
Shanxi Science & Technology of Transportation
关键词
粉煤灰
混凝土
抗压强度
干缩
抗氯离子渗透性
fly ash
concrete
compressive strength
dry shrinkage
chloride ion permeability
