摘要
为研究硫酸盐侵蚀作用下水泥砂浆水力劈裂特性,利用三场耦合试验系统,设计4种试验工况进行水力劈裂试验,分析不同pH值的硫酸盐溶液、不同侵蚀时间下水泥砂浆力学性能和抗水力劈裂能力。试验结果表明,不同pH值的硫酸盐溶液对水泥砂浆的水力劈裂力学特性有不同影响,在侵蚀后期,对于0.1 mol/L的Na_(2)SO_(4)溶液,pH值分别为7、3、1时,对砂浆试样水力劈裂力学特性的侵蚀劣化程度逐渐减小;硫酸盐侵蚀下的水泥砂浆抗水力劈裂能力和侵蚀时间有较好的三次函数相关关系。
In order to study the hydraulic fracture characteristics of cement mortar under sulfate attack,four test conditions were designed using a three-field coupling test system.The mechanical properties and hydraulic fracture resistance of cement mortars in sulfate solutions with different pH values and with different erosion times were analyzed.The experimental results show that the cement mortars in sulfate solutions with different pH values has different effects on the mechanical properties of hydraulic fracture.In the later stage of erosion,the deterioration degrees of hydraulic fracture properties of mortar in the 0.1 mol/L Na_(2) SO_(4) solution with pH values of 7,3 and 1 gradully decrease.It was found that the hydraulic fracturing resistance of cement mortar under sulfate attack has a significant cubic function relationship with the erosion time.
作者
李凌
徐力群
吴琼
杜坤
林文
LI Ling;XU Liqun;WU Qiong;DU Kun;LIN Wen(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)
出处
《水利水电科技进展》
CSCD
北大核心
2021年第3期83-88,共6页
Advances in Science and Technology of Water Resources
基金
国家自然科学基金雅砻江联合基金(U1765205)
河海大学中央高校基本科研业务费项目自由探索专项(B200203039)。
关键词
水泥砂浆
硫酸盐侵蚀
水力劈裂特性
劣化
pH值
cement mortar
sulfate attack
hydraulic fracture characteristics
deterioration
pH value
