EXPERIMENTAL STUDY ON SODIUM SULFATE ATTACK ON MORTAR CONTAINING LIMESTONE POWDER AND FLY ASH AT EARLY AGE

摘要：

The effect of limestone powder and fly ash on sodium sulfate attack on mortar atearly age was studied by testing the change of the strength,expansion and hydration productsof the specimens stored in Na2SO4 solution at certain periods. Experimental results show thatstrength of mortar stored in Na2SO4 solution increase a little before 28 d,but decrease fastsubsequently. The more content of limestone powder and fly ash,the less strength lose;Mortar swells in the Na2SO4 solution with the development of soaking time. The morecontent of limestone powder and fly ash,the less expansion rate; the expansion and decreaseof strength of mortars result from expansion of gypsum and the lose of Ca(OH)2 and otherproducts of cement,and the mortars containing limestone powder and fly ash have bettersodium sulfate resistance.

关键词： limestone powder fly ash mortar sodium sulfate attack

作者: LIU Shu-hua YAN Peiyu

作者单位: State Key Laboratory of Water Resource and Hydropower Engineering Science,Wuhan University,Wuhan,430 Department of Civil Engineering,Tsinghua University,Beijing 100084,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 542-548

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）