摘要
为研究纤维水泥砂浆与混凝土界面黏结性能,采用钻芯拉拔法试验制作模拟中型柱混凝土构件,并分别外包不同强度的聚乙烯醇纤维水泥砂浆、聚丙烯纤维水泥砂浆、钢纤维水泥砂浆。对制作的试验构件进行钻芯拉拔试验,得出界面破坏时的拉拔力,将得到的不同类型的纤维水泥砂浆构件拉拔力数据与构件混凝土轴心抗拉强度、纤维水泥砂浆抗压强度进行比较分析。结果表明,在该试验中合成纤维水泥砂浆的界面黏结强度比钢纤维水泥砂浆的界面黏结强度高;界面黏结强度与构件混凝土轴心抗拉强度呈正相关关系,与纤维水泥砂浆抗压强度呈正相关关系,界面黏结力与砂浆抗压强度呈线性相关关系。
To investigate the interfacial bond behaviors between fiber cement mortar and concrete with core drilling and pull-off tests,medium-sized columnar concrete samples enclosed with different strengths of polyvinyl alcohol fiber cement mortar,polypropylene fiber cement mortar,and steel fiber cement mortar were prepared. Core drilling and pull-off tests were conducted on the samples to obtain the pulling force with failure occurring at the interface,and the results of different kinds of samples from pull-off tests were compared with the axial tensile strength of concrete and compressive strength of fiber cement mortar. The results show that the interfacial bond strength between synthetic fiber cement mortar and concrete is higher than that between steel fiber cement mortar and concrete,and that the interfacial bond strength is positively correlated with the axial tensile strength of concrete and compressive strength of fiber cement mortar. There is also a linear correlation between the interfacial bond strength and compressive strength of fiber cement mortar.
出处
《河海大学学报(自然科学版)》
CAS
CSCD
北大核心
2016年第4期291-296,共6页
Journal of Hohai University(Natural Sciences)
基金
国家火炬计划(2013GH561393)
国家自然科学基金(51278187)
关键词
纤维水泥砂浆
混凝土
界面
黏结性能
钻芯拉拔
相关系数
线性相关
fiber cement mortar
concrete
interface
bond behavior
core drilling and pull-off
correlation coefficient
linear correlation