氯盐干湿环境下TRC与老混凝土的界面特性研究

发布时间：2018-06-15 18:38

本文选题：纤维编织网增强混凝土 + 界面性能　；参考：《材料导报》2017年S1期

【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。
[Abstract]:The effect of chlorine salt dry and wet cycle on the interfacial properties of reinforced fabric reinforced concrete (TRC) and ordinary silicate concrete was studied by means of double shear loading. The microstructure of the interface under the action of chlorine salt dry-wet cycle was investigated by SEMS-Scanning electron microscopetechnique. The results show that the microstructure of the interface between TRC and the old concrete will damage and deteriorate under the chlorine salt dry and wet cycle; compared with the continuous chlorine salt immersion, the chlorine salt dry and wet cycle has a greater effect on the interface bond performance; under the same number of dry and wet cycles, The bond strength of the strengthened interface decreases with the increase of chloride solution concentration, and decreases with the increase of cycle times under the same chloride solution concentration.
【作者单位】：中国矿业大学深部岩土力学与地下工程国家重点实验室;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;
【基金】：国家自然科学基金(51478458;51108451) 江苏省自然科学基金(BK2011220)
【分类号】：TU528

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