氯化钠溶液对水泥砂浆的腐蚀行为  

Corrosion of Sodium Chloride Solution on Cement Mortar

作　　者：黄凤凤[1] 苏楠楠[1] 张强[1] 刘海鹏[1] 石志慧 董晓强[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024

出　　处：《科学技术与工程》2015年第20期123-127,共5页Science Technology and Engineering

基　　金：国家自然科学基金资助项目(51078254);山西省回国留学人员科研资助项目(2013-043);山西省高等学校大学生创新创业训练项目(2014531)资助

摘　　要：为研究氯化钠溶液对水泥砂浆的腐蚀,以浸泡在不同浓度氯化钠溶液中的水泥砂浆试块为研究对象,进行了电阻率和无侧限抗压强度试验。结果表明:不同龄期、不同氯化钠浓度下试块的电阻率均随电流频率的增大而明显降低,建议采用50 k Hz^1 MHz的电流测试频率范围为宜;试块电阻率和无侧限抗压强度随龄期的不断增加均呈现不同速率的增长;试块的电阻率均随氯化钠浓度的增加先保持稳定后呈减小趋势,无侧限抗压强度呈现相同的变化规律;随电阻率的增长水泥砂浆的无侧限抗压强度线性增大。To study the corrosion of sodium chloride solution on cement mortar, the cement mortar blocks were soaked in different concentrations of sodium chloride solution, and their electrical resistivity and unconfined com- pressive strength were measured. The results show that, the electrical resistivity decrease significantly with increas- ing of current frequency and the reasonable range of current frequency is recommended as 50 kHz - 1 MHz. The unconfined compressive strength and electrical resistivity of cement mortar increase with the increasing of curing time. The unconfined compressive strength and electrical resistivity of cement mortar remain stable firstly and then decrease with the increasing of sodium chloride concentration. The unconfined compressive strength increases linear with the increasing of the electrical resistivity.

关 键 词：水泥砂浆 氯化钠 腐蚀 电阻率 电流频率 无侧限抗压强度 

分 类 号：TU502.4[建筑科学—建筑技术科学]