硫酸盐侵蚀环境下水泥砂浆损伤评价研究  

Study on evaluation of cement mortar damage in sulfate erosion environment

作　　者：刘洪珠[1,2] 赵铁军[1,2] 陆文攀[1,3] 曹承伟[1,2] 王燕茹[1,2] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]山东省蓝色经济区工程建设与安全协同创新中心青岛理工大学,山东青岛266033 [3]山东中通钢构建筑股份有限公司,山东聊城252024

出　　处：《工程建设》2015年第4期6-9,共4页Engineering Construction

基　　金：国家重点基础研究发展计划"973"项目(2015CB655100)

摘　　要：通过测定不同硫酸盐侵蚀龄期,不同水灰比下普通硅酸盐水泥和高抗硫酸盐水泥砂浆的相对动弹性模量,评价硫酸盐侵蚀环境下水泥砂浆损伤。试验结果表明,在5%的硫酸钠溶液中长期浸泡的不同水泥砂浆试件,相对动弹性模量均随着硫酸盐侵蚀时间的增加而降低,且随着水灰比的增大而减小。说明由于硫酸盐侵蚀造成的混凝土损伤随着侵蚀龄期的增加而加剧,降低水灰比可以提高水泥砂浆的抗硫酸盐侵蚀性能。在相同硫酸盐侵蚀环境下,高抗硫酸盐水泥较普通水泥具有良好的抗硫酸盐侵蚀性能。dinary Portland rosion ages and Through determination of the relative dynamic elastic modulus of orcement and high sulfate resistant cement mortar in different sulfate edifferent water cement ratio, the damage of cement mortar in sulfate erosion environment was evaluated. The results show that, the relative dynamic elastic modulus of different cement mortar specimens immersed in 5% sodium sulfate solution in long term reduces with the increase of sulfate erosion time, and decreases as the water cement ratio increases. This indicates that, the concrete damage caused by sulfate erosion increases with the increase of erosion ages, reducing water cement ratio can improve the sulfate erosion resistance of cement mortar. Therefore in the same sulfate erosion environment, the high sulfate resistant cement has better sulfate erosionresistance than ordinary Portland cement.

关 键 词：硫酸盐侵蚀 相对动弹模量 高抗硫酸盐水泥 砂浆 

分 类 号：TU528.45[建筑科学—建筑技术科学]