纤维弹性模量对再生骨料混凝土力学性能的影响研究

Study on effect of fiber elastic modulus on mechanical properties of recycled aggregate concrete

建筑业可持续发展背景下,可实现建筑垃圾循环使用的再生骨料混凝土逐渐成为研究热点,然而再生骨料混凝土的内部机理缺陷限制了其应用范围。基于国内外研究现状,分析了聚丙烯纤维、钢纤维、玄武岩纤维等不同弹性模量的纤维作为增强材料加入再生骨料混凝土中时再生骨料混凝土的内部机理以及宏观性能、纤维的类型及特点。研究表明:纤维在有效改善再生骨料混凝土力学性能的同时,其弹性模量也在一定程度上决定了再生骨料混凝土的力学性能。

In the context of sustainable development in the construction industry,recycled aggregate concrete that can achieve the recycling of construction waste has gradually become a research hotspot.However,the internal mechanism defects of recycled aggregate concrete limit its application scope.Based on the current research sta-tus at home and abroad,this article analyzes the internal mechanism,macroscopic performance,fiber types,and characteristics of recycled aggregate concrete when fibers with different elastic modulus,such as polypropylene fibers,steel fibers,and basalt fibers,are added as reinforcement materials.The research has shown that fibers can effectively improve the mechanical properties of recycled aggregate concrete,and the elastic modulus of fi-bers also determines the mechanical properties of recycled aggregate concrete to a certain extent.