Effects of sulfate and chloride on the early compressive strength of seawater and sea sand concrete
In this work,the resistance to sulfate attack and chloride ion attack of freshwater river-sand concrete(SC)and seawater and sea sand concrete(SSC)were comparatively studied.Two types of concrete with different water-cement ratios were soaked in different sulfate solutions,and the early compressive strength and compressive corrosion resistance coefficient were determined to analyze the resistance to sulfate attack.The resistance to chloride ion attack of both types of concrete was studied by soaking in 5%NaCl solution.The results showed that soaking sulfate solution or NaCl solution was beneficial to improve the 3 d compressive strength of SSC,but will adversely affect the 7 d compressive strength.The resistance to sulfate and chloride ion erosion of SC is better than that of SSC with the increase of age.The water-cement ratio affected the compressive strength of SC and SSC.The compressive strength of concrete with water-cement ratio of 0.45 was higher than that of water-cement ratio of 0.50.The resistance to sulfate attack and chloride ion attack of SSC with low water-cement ratio condition was weaker than that of SSC with high water-cement ratio.
freshwater river-sand concreteseawater and sea sand concreteresistant to sulfate attackresistant to chloride ion attack
万方数据
