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《Journal of Building Materials》 2007-01
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Investigations of Influence Factor on the Rate of Concrete Sulfate Attack

FANG Xiang-wei~1,SHEN Chun-ni~1,YANG De-bin~2,CHEN Zheng-han~1,ZHANG Zhong-fa~1(1.Department of Architecture and Civil Engineering,Logistical Engineering University,Chongqing 400016,China;2.Department of Materials Science and Engineering,Chongqing Communication University,Chongqing 400074,China)  
The effects of water cement ratio,cement sand ratio,specimen size,pre-storage method,solution concentration and temperature on the rate of concrete sulfate attack were investigated.The test results show that the speed of attack is accelerated with the increasing of water cement ratio,the decreasing of cement sand ratio and the smaller size of the specimen.The specimen with large water cement ratio,small cement sand ratio and small size should be adopted in order to accelerate the test speed of sulfate attack.High prestorage temperature and short pre-storage time can accelerate the speed of sulfate attack.When solution concentration and temperature are lower than certain value,the speed of attack is accelerated with increasing concentration and temperature.However,higher temperature and concentration of solution may decrease the rate of attack.The speed of attack of sodium sulfate is faster than that of magnesium sulfate under various conditions.It is suitable to adopt the coefficient of tensile strength as the accelerated assessing criterion for the attack of sodium sulfate.For the attack of magnesium sulfate,the coefficient of tensile and compressive strength should be considered together.
【Fund】: 重庆市自然科学基金资助项目(CSTC 2006BB6119);; 后勤工程学院研究生创新专项基金资助项目
【CateGory Index】: TU528.0
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