氯盐干湿环境下TRC与老混凝土的界面特性研究  

Interfacial Properties Between Textile Reinforced Concrete(TRC)and Old Concrete Under Chloride Wet-dry Environment

作　　者：尹世平[1,2] 赵璐[1,2] 强东峰 李鹏昊[2] YIN Shiping;ZHAO Lu;QIANG Dongfeng;LI Penghao(State Key Laboratory for Geomechanics&Deep Underground Engineering,China University of Mining and Technology, Xuzhou 221112;Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,School of Mechanics&Civil Engineering,China University of Mining and Technology,Xuzhou 221116)

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,徐州221112 [2]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,力学与建筑工程学院,徐州221116

出　　处：《材料导报》2017年第A01期346-350,共5页Materials Reports

基　　金：国家自然科学基金(51478458;51108451);江苏省自然科学基金(BK2011220)

摘　　要：采用双面剪切的加载方式研究了氯盐干湿循环对纤维编织网增强混凝土(Textile reinforced concrete,TRC)与普通硅酸盐混凝土界面性能的影响,并通过SEM(Scanning electron microscope)技术探究了氯盐干湿循环作用下界面的微观结构。研究发现:氯盐干湿循环下,TRC与老混凝土界面微观结构会损伤劣化;与连续氯盐浸泡相比,氯盐干湿循环对界面粘结性能的影响较大;相同干湿循环次数下,加固界面的粘结强度随着氯盐溶液浓度的增加而降低;相同氯盐溶液浓度下,加固界面的粘结强度随着循环次数的增加而降低。Based on double shear test,interfacial properties between textile reinforced concrete(TRC)and old ordinary Portland cement concrete were studied under the effect of sodium chloride solution wet-dry cycle.Besides,interface microstructure was investigated by SEM(scanning electron microscope).Conclusions were drawn in this passage:under the wet-dry cycles,the microstructure of the interface between TRC and the old concrete would be damaged,when compared with that of continuous soaking in chloride solution,the condition of sodium chloride solution wet-dry cycle had more obvious influence on bonding properties between TRC and old concrete;when in the same concentration of chloride solution,the bond strength between TRC and the old concrete decreased with the increase of cycle numbers;when passing the same number of wet dry cycle,the bond strength between TRC and the old concrete decreased with the increase of the concentration of chloride solution.

关 键 词：纤维编织网增强混凝土 界面性能 粘结强度 界面滑移变形 

分 类 号：TU52[建筑科学—建筑技术科学]