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Research on Mechanical Properties of Hybrid Fibers Reinforced Rubber Concrete
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摘要: 为探究混掺纤维对橡胶混凝土工作性能和力学性能的作用，以混掺钢-玻璃纤维增强橡胶混凝土为研究对象，进行了坍落度测试，以及轴心抗压、劈裂抗拉和四点弯曲试验，分析了钢纤维掺量、玻璃纤维掺量和玻璃纤维长度对橡胶混凝土工作性能、力学性能和脆性系数的影响规律。研究结果表明：掺入钢纤维和玻璃纤维会使橡胶混凝土的工作性能变差，当体积掺量相同时，玻璃纤维的影响更大；不论是单掺纤维试件还是混掺纤维试件，橡胶混凝土的力学性能总体上随钢纤维掺量增加而增大，而随玻璃纤维掺量的增加先增大后降低；更长的玻璃纤维可以更有效地抑制裂缝的发展，从而更有效地提高橡胶混凝土的力学性能；混掺纤维能有效降低橡胶混凝土的脆性系数，提高橡胶混凝土的韧性。Abstract: In order to study the effects of hybrid fibers on the workability and mechanical properties of rubber concrete, the slump, axial compression, splitting tensile and four-point bending tests were carried out. Taking the hybrid steel-glass fibers reinforced rubber concrete as the research object, the influence of steel fibers content, glass fibers content and glass fibers length on the workability, mechanical properties and brittle coefficient of rubber concrete was analyzed. The results showed that adding steel fibers and glass fibers decreased the workability of rubber concrete, and the influence of glass fibers were greater when the volume content was the same; as the steel fibers content increased, the mechanical properties of rubber concrete increased; as the glass fibers content increased, the mechanical properties of rubber concrete first increased and then decreased; longer glass fibers could inhibit the development of cracks more effectively, thus longer fibers improved the mechanical properties of rubber concrete more; hybrid fibers could effectively reduce the brittleness coefficient of rubber concrete and improve the toughness of rubber concrete.
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Key words:
- concrete /
- waste rubber /
- steel fibers /
- glass fibers /
- workability /
- mechanical properties
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