纤维增强再生混凝土高温后力学性能研究进展

doi:10.19936/j.cnki.2096-8000.20241128.019

摘要/Abstract

摘要： 再生混凝土因节能环保、可循环利用,在土木工程中具有广阔的应用前景。不过再生混凝土存在强度低等固有缺陷,且经历火灾高温后,混凝土结构容易爆裂破坏,因此可采用掺加纤维的方式改善其高温后力学性能。本文在大量查阅国内外文献的基础上,基于纤维增强理论及混凝土高温劣化与损伤机理,总结了钢纤维、聚丙烯纤维、玄武岩纤维、玻璃纤维及混杂纤维等不同纤维增强再生混凝土高温后力学性能的研究成果,分析纤维种类与掺量、温度变化等因素对高温后纤维增强再生混凝土抗压强度、劈裂抗拉强度、弹性模量等力学性能的影响,以及经历不同高温后,不同纤维对再生混凝土基体发挥增强作用的微细观机理,最后提出当前研究存在的问题和有待进一步研究的方向,为纤维增强再生混凝土高温后力学性能的理论研究和实际应用提供参考。

关键词: 再生混凝土, 纤维增强, 高温损伤, 力学性能, 研究进展, 复合材料

Abstract: Recycled aggregate concrete is widely used in civil engineering because of its energy-saving, environmental protection and recycling. But because of its inherent defects such as low strength, the concrete structure being easy to burst after high temperature of fire, the way of adding fiber can be used to improve its mechanical properties after high temperature. Based on extensive literature review at home and abroad, the research results of mechanical properties of recycled aggregate concrete after high temperature by different fibers such as steel fiber, polypropylene fiber, basalt fiber, glass fiber and hybrid fiber are summarized, based on the theory of fiber reinforcement and the mechanism of deterioration and damage of concrete at high temperature. The effects of factors such as fiber type and content, temperature changes on the mechanical properties of fiber reinforced recycled concrete after high temperature, such as compressive strength, splitting tensile strength and elastic modulus of recycled concrete after high temperature, and the micro-mesoscopic mechanism of the reinforcement effect of different fibers on the matrix of recycled aggregate concrete after different high temperatures are analyzed. Finally, the current research issues and directions for further research are indicated. The reference for theoretical research and practical application of mechanical properties of fiber reinforced recycled aggregate concrete after high temperatures are provided.

Key words: recycled aggregate concrete, fiber reinforcement, high temperature damage, mechanical proper-ties, research progress, composites

中图分类号:

TB332

刘胜兵, 雷世杰. 纤维增强再生混凝土高温后力学性能研究进展[J]. 复合材料科学与工程, 2024, 0(11): 133-142.

LIU Shengbing, LEI Shijie. Research progress on mechanical properties of fiber reinforced recycled aggregate concrete after high temperature[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(11): 133-142.

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