海水侵蚀后水泥砂浆的单轴动态力学性能研究  

DYNAMIC MECHANICAL PROPERTIES OF CEMENT MORTAR AFTER CORRODED BY SEA WATER

作　　者：熊良宵[1] 刘慈军[2] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211 [2]宁波市高等级公路建设指挥部,浙江宁波315192

出　　处：《岩石力学与工程学报》2013年第12期2481-2488,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：浙江省自然科学基金项目(LY13E080021);宁波市自然科学基金项目(2011A610072);浙江省重中之重学科项目(zj1008)

摘　　要：对经海水侵蚀后的水泥砂浆试件进行单轴动态压缩试验,研究应变速率、侵蚀溶液的类型和浓度对水泥砂浆的应力–应变曲线、极限抗压强度、峰值应变和弹性模量的影响。研究结果表明,水泥砂浆的强度随着应变率的增加而提高,水泥砂浆的强度越低,其强度对应变率更加敏感;随着应变率的增加,水泥砂浆的峰值应变会逐渐增加,但弹性模量会出现先增加后减小的变化规律。应变加载速率对经海水侵蚀后水泥砂浆的应力–应变曲线和强度的影响,与水灰比、侵蚀介质的类型、浓度和侵蚀时间有很大关系。Dynamic test on cement mortar specimen after corroded by sea water under uniaxial stress was carried out： and the effects of strain rate, the type and the concentration of erosive solution on the stress-strain curve, ultimate compressive strength, peak strain and elastic modulus of cement mortar were studied. The research results show that the ultimate compressive strength of cement mortar will increase with the increase of strain rate~ and the strength of cement mortar with low strength is more sensitive to strain rate than cement mortar with high strength. The peak strain of cement mortar will also increase with the increase of strain rate. but the elastic modulus will increase firstly and then decrease later. The effects of strain rate on the stress-strain curve, ultimate compressive strength, peak strain and elastic modulus of cement mortar after corroded by sea water have much relation with the ratio of water to cement, the type of erosive solution, the concentration and the corrosion time.

关 键 词：岩石力学 水泥砂浆 侵蚀溶液 应变率 力学特性 

分 类 号：TU45[建筑科学—岩土工程]