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《Sichuan Building Science》 2013-04
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Study the corrosion of drying-wetting sulfates on washed sea sand concrete

SU Qing1,CHEN Airong1,ZHAO Tiejun2(1.Department of Bridge Engineering,Tongji University,Shanghai 200092,China;2.School of Civil Engineering,Qingdao Technological University,Qingdao 266033,China)  
The damage process and microstructure of washed sea sand concrete,attacked by solutions of 5% Na2SO4(by mass,same below),5% MgSO4 + 3.5% NaCl with method of drying-wetting cycle are studied.The results show that the elastic modulus of concrete attacked by Na2SO4 behaviors in a decreasing stage followed by improved stage finally fell rapidly.For the concrete exposed to solution composed of Mg2 +and SO24-,its relative dynamic elastic modulus decreased firstly,then kept stable,finally decreased rapidly to failure.
【Fund】: 贵州省交通运输厅科技项目(2010-122-018)
【CateGory Index】: TU528
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