钢纤维-玻璃纤维橡胶混凝土断裂性能研究  

Research on Fracture Properties of Rubber Concrete Containing Steel Fibers and Glass Fibers

作　　者：卢利 何明理 李海燕 陈苇 李华伟 熊哲[2] 冯攀登 刘锋[2] LU Li;HE Mingli;LI Haiyan;CHEN Wei;LI Huawei;XIONG Zhe;FENG Pandeng;LIU Feng(Guangdong Yonghe Construction Group Co.,Ltd.,Maoming 525499,China;School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东永和建设集团有限公司,广东茂名525499 [2]广东工业大学土木与交通工程学院,广州510006

出　　处：《工业建筑》2023年第12期216-221,共6页Industrial Construction

基　　金：国家自然科学基金项目(12072080)。

摘　　要：为改善橡胶混凝土的断裂性能,通过三点弯曲断裂试验,研究了钢纤维-玻璃纤维对橡胶混凝土断裂性能的影响变化规律及其增强机理。结果表明:在混凝土中掺入橡胶粉会削弱混凝土的抗折性能,但有利于改善混凝土的韧性与抗变形能力;钢纤维-玻璃纤维组成的混掺纤维对橡胶混凝土断裂性能具有显著作用,当混掺纤维总量为8%,且钢纤维与玻璃纤维的使用比例为3∶1时,混掺纤维橡胶混凝土的抗折强度最高达到7.87 MPa,并具有4681.60 J/m^(2)的断裂能;基于双K断裂模型分析,混掺纤维能够显著提升橡胶混凝土的断裂韧性,且在混掺纤维总掺量超过6%时最为显著。同时,由于混掺纤维的多尺度协同作用,橡胶混凝土的应力、应变行为得到改善,其抗荷载能力与韧性实现了显著的增强。In order to enhance the fracture properties of rubber concrete,a three-point bending fracture test was conducted to study the impact of steel fiber-glass fibers on the fracture properties of rubber concrete and its strengthening mechanism.The findings indicated that the addition of rubber powder to concrete might reduce its flexural performance,but it had a positive effect on enhancing the toughness and deformation resistance of concrete.The hybrid fiber composed of steel fibers and glass fibers had a substantial positive impact on the fracture properties of rubber concrete.When the total amount of hybrid fibers was 8%and the ratio of steel fiber to glass fiber was 3∶1,the flexural strength of the rubber concrete containing hybrid fibers reached 7.87 MPa,with a fracture energy of 4681.60 J/m^(2).Based on the analysis of the double-K fracture model,it was evident that the hybrid fibers greatly enhanced the fracture toughness of rubber concrete,with the most significant improvement observed when the total amount of hybrid fibers exceeded 6%.Additionally,the multi-scale synergy of hybrid fibers enhanced the stress-strain performance of rubber concrete,resulting in improved load resistance and toughness.

关 键 词：橡胶混凝土 钢纤维 玻璃纤维 混掺纤维 断裂性能 

分 类 号：TU528[建筑科学—建筑技术科学]