玻璃纤维混凝土抗折性能及弯曲韧性试验研究  

Experiment study on flexural properties and bending toughness of glass fiber reinforced concrete

作　　者：张延年[1] 郭晓钰 王广林[1] 刘晓阳 王铁源 于洋[1] 刘文亮 ZHANG Yannian;GUO Xiaoyu;WANG Guanglin;LIU Xiaoyang;WANG Tieyuan;YU Yang;LIU Wenliang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Beiing Weituo Times Architectural Design Limited Lability Company,Beijing 100025,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]北京维拓时代建筑设计股份有限公司,北京100025

出　　处：《混凝土》2024年第1期1-5,共5页Concrete

基　　金：十三五国家重点研发计划(2019YFC1907202);辽宁省重大科技专项(2020JH1/10300005)。

摘　　要：为研究玻璃纤维对混凝土的抗折性能及弯曲韧性的影响,以玻璃纤维掺量、玻璃纤维长度和混凝土基体强度等级为主要参数,对玻璃纤维混凝土小梁试件进行弯拉试验。结果表明:玻璃纤维掺入混凝土后,破坏形态得到改善,破坏后试件整体性能良好,抗折强度以及弯曲韧性均有显著提高;0.5%~1.5%时抗折强度随玻璃纤维掺量的增加而提高,1.5%~2.0%时随玻璃纤维掺量的增加而降低;抗折强度与弯曲韧性随玻璃纤维长度与基体强度的增加而增加。玻璃纤维可有效改善混凝土的抗折性能与弯曲韧性。In order to study the effect of glass fiber on the flexural properties and bending toughness of concrete,taking the content of glass fiber,the length of glass fiber and the strength grade of concrete matrix as the main parameters,the flexural tensile test on glass fiber reinforced concrete trabecular specimens is carried out.The results show that the failure mode is improved when glass fiber is added into concrete;Afer failure,the overall performance of the specimen is good,and the flexural strength and bending toughness are significantly improved;The flexural strength increases with the increase of glass fiber content in the range of 0.5%to 1.5%,and decreases with the in-crease of glass fiber content in the range of 1.5%to 2.0%;The bending strength and flexural toughness increase with the increase of glass fiber length and matrix strength.Glass fiber can effectively improve the bending properties and flexural toughness of concrete.

关 键 词：玻璃纤维混凝土 破坏形态 抗折性能 弯曲韧性 

分 类 号：TU528.572[建筑科学—建筑技术科学]