纤维高强混凝土抗折强度试验研究  

Experiment Research of Flexural Strength on Fiber Reinforced High-strength Concrete

作　　者：杨启斌[1] 罗素蓉[2] 

机构地区：[1]福建工程学院管理学院,福建福州350108 [2]福州大学土木工程学院,福建福州350108

出　　处：《施工技术》2013年第24期67-70,共4页Construction Technology

基　　金：福建省科技厅重大项目(2012H6011);福建省住房和城乡建设厅项目(2011-K-22);福建省教育厅项目(JA10217)

摘　　要：针对掺加纤维可改善高强混凝土的弯曲性能特点,采用三分点加载的方式进行了钢纤维和合成纤维对高强混凝土抗折强度影响的试验研究。试验参数主要有纤维类型、纤维形状、纤维含量。试验结果表明:钢纤维可显著提高混凝土抗折强度,而合成纤维对混凝土抗折强度的影响并不显著;纤维形状为弓形时,对混凝土抗折强度的提高最显著;当掺入合成纤维时,混凝土7d抗折强度与28d抗折强度的比值减小;而掺入钢纤维时混凝土7d抗折强度与28d抗折强度比值基本保持不变。The tensile performance of high-strength concrete can be improved by adding fiber, so the experiment study was conducted by using three point loading to research the influence of fiber on high- strength concrete flexural strength. The test parameters included fiber types, fiber shape, fiber content. The test results show that the steel fiber can significantly improve flexural strength, but the folding synthetic fiber has not significant influence on flexural strength, and the arch fiber has the most significant influence on flexural strength. The ratio of 7 days flexural strength and 28 days flexural strength decreased when synthetic fiber was added,but the ratio almost kept invariant when steel fiber was added.

关 键 词：混凝土 钢纤维 高强混凝土 抗折强度 试验 

分 类 号：TU528.57[建筑科学—建筑技术科学]