基于正交试验法的BFRP筋与纤维再生混凝土黏结性能研究  

Study on Bonding Strength Performance of BFRP Bar and Fiber Recycled Concrete Based on Orthogonal Experiment

作　　者：孟文静[1] 刘华新[1] 刘红艳[1] 柳根金 

机构地区：[1]辽宁工业大学土木建筑工程学院,锦州121000

出　　处：《混凝土与水泥制品》2015年第6期54-57,共4页China Concrete and Cement Products

基　　金：辽宁省高等学校优秀人才支持计划项目(LR2012020)

摘　　要：为了研究BFRP筋与玄武岩纤维再生混凝土黏结性能,采用正交试验设计方法分析了再生混凝土强度等级、玄武岩纤维短切纱的体积掺合率以及长度对其影响。设计了27组试件,通过中心拉拔试验,得到相应的平均黏结强度值以及自由端滑移量。结果表明,纤维的掺量是影响BFRP筋与纤维再生混凝土拉拔试验自由端滑移的重要因素;同一掺量下,纤维长度为18mm的试件对应的极限黏结强度大于纤维长度为6mm、12mm的试件;玄武岩纤维短切纱体积掺量为0.2%时,对应的黏结性能最好;BFRP筋与纤维再生混凝土的黏结强度随纤维再生混凝土强度等级的提高而增大。In order to study the bonding performance of BFRP bar and basalt fiber recycled concrete, the orthogonal experiment was designed. The parameters were recycled concrete strength, the amount and length of chopped basalt fiber. 27 groups of specimens were designed within three in each of the group. The average bond strength and the free end slip were achieved by center pull-out test. The experimental results show that the fiber content is a significant influence factor of slip at free ending for pull-out test in BFRP reinforcement and fiber recycled concrete specimen. The ultimate bond strength of 18mm-length chopped fiber yarn specimens is greater than those of specimens with 6mm and 12mm fibers un- der the same fiber dosage. When the volume fraction of chopped basalt fiber yarn gets 0.2%, the corresponding bonding performance is the best. Bond strength of BFRP reinforcement and fiber recycled concrete increases with the improvement of fiber recycled concrete strength.

关 键 词：玄武岩纤维复合筋 纤维再生混凝土 黏结强度 拉拔试验 

分 类 号：TU528.572[建筑科学—建筑技术科学]