土木工程与管理学报2012，Vol.29Issue(1)：15-19,5.
矿物掺合料对自密实混凝土抗氯离子渗透性的影响
Influence of Mineral Admixtures on the Resistance to Penetration of Chloride Ion in Self-compacting Concrete
摘要
Abstract
Durability is an important property for self - compacting concrete ( SCC). This paper studied the resistance to chloride ion penetration performance of SCC with addition of fly ash and slag based on concrete coulomb electric flux test. Both fly ash and slag can improve the resistance to chloride ion permeability in SCC and slag shows better effect than fly ash. The addition of both fly ash and slag show little effect on the resistance to chloride ion permeability in SCC. The mechanism is that the addition of fly ash or slag can improve the density of cement paste and reinforce the interfacial transition zone between cement paste and aggregate. Both physical and chemical adsorption of Cl on the mineral admixtures contributes to the consolidation of Cl and the reduction of Cl permeability. The mineral admixtures can decrease the risk of segregation and bleeding in SCC. Fly ash is more effective than the slag powder for improving SCC fluidity. The addition of both slag and fly ash shows an enhanced effect on the SCC strength gain and SCC strength grade at 28 d can be increased from 5 Mpa to 10 Mpa.关键词
自密实混凝土/抗氯离子渗透/粉煤灰/矿渣Key words
self-compacting concrete/ resistance to chloride ion permeability/ fly ash/ slag powder分类
建筑与水利引用本文复制引用
张长清,吴海兵,杜明月,刘齐霞,郑力翀,何广利,徐文胜..矿物掺合料对自密实混凝土抗氯离子渗透性的影响[J].土木工程与管理学报,2012,29(1):15-19,5.基金项目
广东省交通厅科技项目(2008-14) （2008-14）
华中科技大学2011年大学生科技创新项目 （）
