摘要
高延性纤维混凝土(HDFC)具有良好的裂缝控制能力、高强度和韧性。采用硫酸盐-干湿循环试验方法对HDFC试件进行了侵蚀试验,研究其抗侵蚀性能。试验对30个(10组) HDFC立方体试件进行单轴受压试验,测定不同硫酸盐侵蚀次数后HDFC的表观特征以及各项基本力学性能,包括极限承载力、峰值应变和裂缝状态。试验结果表明,经过150次硫酸盐侵蚀后HDFC具有良好的裂缝控制能力,试件出现较少的细密裂纹,表现出良好的抗侵蚀性能。通过分析HDFC应力-应变曲线,得到HDFC干湿循环本构模型曲线,与试验曲线对比发现,本构模型曲线与试验曲线较为吻合。
High ductility fiber concrete( HDFC) has good crack control ability,high strength and toughness.The sulfate-dry-wet cyclic test method was used to study the corrosion resistance of HDFC specimens.Ten groups of 30 HDFC cube specimens were tested under uniaxial compression.The apparent characteristics and basic mechanical properties of HDFC after different sulfate erosion times were measured,including ultimate bearing capacity,peak strain and crack state.The test results show that HDFC has good crack control ability after 150 times of sulfate erosion,the specimens have fewer fine cracks and shows good corrosion resistance performance.By analyzing the stress-strain curve of HDFC,the constitutive model curve of dry-wet cycle of HDFC was obtained.Compared with the experimental curve,it is found that the constitutive model curve is in good agreement with the experimental curve.
作者
寇佳亮
林亚党
席方勇
温丛格
Kou Jialiang;Lin Yadang;Xi Fangyong;Wen Congge(School of Civil Engineering & Architecture,Xi'an University of Technology,Xi'an 710048,China;Zhengzhou Institute of Science and Technology,Zhengzhou 454000,China)
出处
《建筑结构》
CSCD
北大核心
2019年第3期80-86,共7页
Building Structure
基金
国家自然科学基金资助项目(51408487)
中国住建部科学技术资助项目(2014-K2-037)
中国博士后科学基金第56批面上资助项目(2014M562437)
陕西省自然科学基金资助项目(2014JQ7292)
陕西省住房城乡建设科技计划项目(2016-K89)
陕西省博士后科学基金资助项目
西安市建设科技项目(SJW2015-09)
关键词
高延性纤维混凝土
硫酸盐-干湿循环
硫酸盐侵蚀
本构关系
单轴受压
high ductility fiber concrete
sulfate-dry-wet cycle
sulfate erosion
constitutive relation
uniaxial compression
