不同酸性环境对砂浆物理力学性能影响研究.pdf

DOI:10.14018/j.cnki.cn13-1085/n.2014.13.012 Value Engineering ·109 · 不同酸性环境对砂浆物理力学性能影响研究 Study on the Impact of Different Acidic Environment on the Physical and Mechanical Properties of Cement Mortar 董亚丽 DONG Ya-li （ 中铁十七局集团第四工程有限公司，重庆404100） （China Railway 17th Bureau Group No.4 Engineering Co. ，Ltd. ，Chongqing 404100 ，China） 摘要： 采用酸性环境下加速试验的方法，研究了不同酸性环境对砂浆物理力学性能的影响。对不同pH 值硝酸环境下和pH=1 时 不同硫酸根浓度在各个腐蚀阶段砂浆的质量变化和抗压强度变化进行比较分析，试验中选取两种水泥材料进行比对试验。结果表明： 溶液pH 值对水泥砂浆物理力学性能劣化影响有很大影响，随酸性的增强砂浆性能劣化速率加剧；在强酸溶液中，硫酸根离子浓度较 高时对砂浆的腐蚀性较强。 Abstract: The accelerated test is adopted under acid environment to study the impact of different acid environment on the physical and mechanical properties of cement mortar. Comparative analysis is done to the quality changes of mortar with different pH value under nitric acid environment and pH=1 at different concentration of sulfuric acid root in each stage of corrosion and the compressive strength. Two cement materials are selected for the comparative test. The results show that the solution pH value of cement mortar has a great impact on the physical and mechanical performance degradation. With the acidic enhancement, the mortar performance degradation rate intensifies. In strong acid solution, higher sulfate ion concentration has stronger corrosion of cement mortar. 关键词： 砂浆；酸性环境；pH 值；硫酸根浓度；物理力学性能 Key words: mortar ；acidic environment ；pH value ；sulfate concentration ；physical and mechanical performance 中图分类号： 文献标识码： 文章编号： TU528.01 A