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《Chinese Journal of Underground Space and Engineering》 2011-02
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Experimental Research on Sulfate Attacking Damage of Anchor Mortar

Chen Qingyu,Wang Guilin,Xu Hong,Zhang Yongxing (College of Civil Engineering,Chongqing University,Chongqing 400045,P.R.China)  
Uniaxial compression experiments of anchor mortar of three water cement ratio series with different sulfate corrosion degrees were conducted by the accelerated deterioration experiment technique,and the compression strength of the mortar in whole corrosion procedure was measured.By observing the macroscopic damage shape and analyzing the time-varying strength curves and corrosion resistance coefficient,the regularity of the strength of mortar with different water cement ratio attacked by sulfate was discussed.The surface of the mortar cracks and flaks at the beginning,then it loses its edge and angle and is destroyed by expansion at last.As the corrosion proceeds,the mortar becomes more plastic under pressure than before.The results show that the speed of sulfate attack is accelerated with the increasing of water cement ratio,the compression strength of the mortar of water cement ratio 0.4 and 0.45 at first increases and then decreases,while the strength of the mortar with water cement ratio 0.5 decreases all the time with the corrosion progresses,the maximum reduction reaches 83%.
【Fund】: 国家重大水专项(2008ZX07315-001);; 重庆市自然科学基金(CSTC 2008BB0318)
【CateGory Index】: TU528
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