钢纤维-玻璃纤维橡胶混凝土断裂性能研究

卢利; 何明理; 李海燕; 陈苇; 李华伟; 熊哲; 冯攀登; 刘锋

doi:10.13204/j.gyjzG23092609

钢纤维-玻璃纤维橡胶混凝土断裂性能研究

doi: 10.13204/j.gyjzG23092609

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

基金项目:

国家自然科学基金项目（12072080）。

详细信息

作者简介:
卢利,男,1968年出生,高级工程师。电子信箱:lul@gdyhjs.cn

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出版历程
- 收稿日期: 2023-09-26
- 网络出版日期: 2024-02-28

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

1. Guangdong Yonghe Construction Group Co., Ltd., Maoming 525499, China;
2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China

摘要

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4 681.60 J/m²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。
- 橡胶混凝土 /
- 钢纤维 /
- 玻璃纤维 /
- 混掺纤维 /
- 断裂性能
Abstract: 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 4 681.60 J/m². 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.
- rubber concrete /
- steel fiber /
- glass fiber /
- hybrid fiber /
- fracture properties

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