摘要
通过拉拔和四点弯曲试验研究了氯盐(NaCl)溶液作用下干湿循环次数、氯盐溶液浓度(质量分数)和短切纤维种类对纤维编织网增强混凝土(TRC)性能的影响.结果表明:在浓度为5.0%的氯盐溶液作用下,随着干湿循环次数的增加,TRC中纤维束与混凝土的界面性能呈现下降趋势,而TRC的抗弯强度有先提高后降低的趋势;在120次干湿循环作用下,随着氯盐溶液浓度的增加,纤维束与混凝土的界面黏结强度变化不大,而TRC的抗弯强度也呈现先升高后降低的趋势.掺加短切AR-glass纤维和PVA纤维均可提高纤维束与混凝土的界面性能及TRC的抗弯性能,且后者对TRC抗弯承载力的提高更为明显.
By the pullout test and four-point bending test, the influence of the number of dry-wet cycles, the concentration（mass fraction） of chloride solution and the types of short fibers on the performance of textile reinforced concrete（TRC） was studied under the action of sodium chloride solution. The results show that under 5 Yo concentration of chloride solution, with the increase of the number of dry-wet cycles, the interracial property between yarns and concrete in TRC presents a downward trend and the bending strength of TRC increases first and then decreases; under 120 times of dry-wet cycles, with the increase of the concentration of chloride solution, the interracial strength between yarns and concrete in TRC changes a little and the bending strength of TRC also increases first and then decreases. Adding both AR-glass and PVA short fibers could improve the interracial property between yarns and concrete in TRC and the ben- ding property of TRC, and the latter has better improvement on the flexural bearing capacity of TRC.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2016年第4期752-757,共6页
Journal of Building Materials
基金
国家自然科学基金资助项目(51478458
51108451)
江苏省自然科学基金资助项目(BK2011220)
中央高校基本科研业务费专项资金资助项目(2014QNA79)
中国博士后基金资助项目(2014T70559
2012M511337)
关键词
纤维编织网增强混凝土
氯盐干湿循环
界面性能
抗弯强度
textile reinforced concrete
chloride dry-wet cycle
interracial property
bending strength
