氯化物侵蚀对水泥土力学性能影响的试验研究

Research of Chloride Erosion Effect on Cement Soil Mechanics Performance Test

针对目前氯化物侵蚀溶液对水泥土力学性能的影响较为复杂的现状,基于氯化物对水泥土影响的机理设计了一种可模拟室外氯化物在水泥土内的离子环境进行试验.该方法采用氯化钠和氯化镁溶液进行模拟试验分析,溶液浓度分别采用0,1.5,3和6g/L,浸泡时间分别为7,14和28d,在试验过程中不定期对溶液的各种离子浓度进行监测,并测定不同浸泡时间下水泥土的抗压强度和变形.试验结果表明,钠离子对水泥土的强度和变形影响小,而镁离子对水泥土的强度和变形影响较大.

At present,the effect of chloride erosion solution on the mechanical behavior of cement soil is become complex,so the test,which can simulate ionic environment of chloride in cement soil,is designed based on the mechanism of chloride effect on soil.Sodium chloride and magnesium chloride were adopted in the simulation experiments.The concentration of the solution was 0,1.5,3and 6g/L,and the soak time was 7,14 and 28drespectively.The concentration of the solution was monitored unscheduled during the experiment,and the compressive strength and deformation of the cemented soil were measured at the same time.Experimental results show that sodium ions has minimal strength and deformation impact on the cement soil,and magnesium ions has the greatest influence on cement soil strength and deformation.