摘要
在混凝土中添加适当的纤维可改善混凝土的强度与韧性,故研究不同纤维种类及掺量的活性粉末混凝土(reactive powder concrete,RPC)在标准养护28 d条件下的抗压强度,并通过扫描电镜分析其微观形态。结果表明:钢纤维-混凝土界面存在薄弱层,当钢纤维的含量为2%时,抗压强度低于不掺加钢纤维的RPC混凝土;当聚氯乙烯纤维(polyvinyl chloride,PVC)含量为0.9%、水胶质量比为0.2时,RPC抗压强度较高。研究结果可为实验室制备掺纤维混凝土提供参考。
The strength and toughness of concrete can be improved by adding appropriate fibers to the concrete.Therefore,this study focused on compressive strength of reactive powder concrete(RPC)added with different types and dosage of fiber under the standard curing condition of 28 d,and analyzed its micromorphology with scanning electron microscope(SEM).The results show that there exists a weak layer in the interface between steel fiber and concrete.When the content of steel fiber is 2%,the compressive strength is lower than that of RPC concrete without steel fiber;when the volume fraction of polyvinyl chloride(PVC)is 0.9%,and the water binder mass ratio is 0.2,the compressive strength of RPC is fairly high.These conclusions can provide reference for preparation of fiber reinforced concrete in laboratory.
作者
卢凯
毛超
薛文
LU Kai;MAO Chao;XUE Wen(School of Civil and Architectural Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,Zhejiang,China)
出处
《浙江科技学院学报》
CAS
2019年第6期484-487,共4页
Journal of Zhejiang University of Science and Technology
基金
浙江省自然科学基金项目(LQ16E080005)
关键词
活性粉末混凝土
纤维
抗压强度
水胶质量比
界面过渡区
reactive powder concrete
fiber
compressive strength
water-binder mass ratio
interface transition zone
作者简介
通信作者:薛文(1983-),女,浙江省杭州人,副教授,博士,主要从事结构耐久性能研究。E-mail:xuewen@zust.edu.cn。
