海水侵蚀环境下混凝土强度的研究

Study on concrete strength under seawater corrosive action

采用普通硅酸盐水泥和矿渣硅酸盐水泥 ,分别配制了水灰比在 0 .4 5～ 0 .6 0范围内的混凝土试件 ,采用加速腐蚀试验 ,研究了在海水腐蚀后 ,其强度随时间变化的规律及原因 ,并为试件损伤状态定量化解析提供了试验数据。研究结果表明 ,在相同的试验条件下 ,矿渣硅酸盐水泥混凝土抗海水侵蚀性优于普通硅酸盐水泥混凝土 ;混凝土试件的抗蚀系数为 0 .8时与美国ASTM标准规定的强度损失 2 5

According to the accelerated corrosion test of common Portland and slag Portland cement simple, water cement ratio from 0.45 to 0.60, the regular pattern and reason on the strength variation to the time were researched. The results provide quantitative explain data of destructional state. Furthermore under the same condition, slag Portland cement concrete is better than common Portland cement on ability of seawater corrosion resistance. When the anti corrosion coefficient of sample is 0.8, the limit value 25 percent of strength loss is all the same to American ASTM standard.