形状记忆合金增强水泥基复合材料及其构件研究进展

Research Progress of Shape Memory Alloy Reinforced Cement-based Composites Materials and Its Components

传统的水泥基材料适用性强、经济性高、用途广泛,但是容易开裂,难以恢复。通过热弹性马氏体相变及其逆相变,形状记忆合金拥有了独特的形状记忆效应、超弹性等卓越性能。因此,可以利用形状记忆合金增强水泥基材料及构件,克服传统水泥基材料抗裂性能差的缺陷,改善水泥基材料构件的开裂和变形自恢复能力。本文从形状记忆合金的材料特性与种类、形状记忆合金纤维增强水泥基复合材料及形状记忆合金筋材增强水泥基复合材料构件三个方面进行综合阐述,并指出现有研究中存在的不足,展望了形状记忆合金增强水泥基复合材料的发展前景。

Traditional cement-based materials have strong applicability,high economy,and wide range of uses.However,they are prone to cracking and difficult to recover.Shape memory alloys have unique properties such as shape memory effect and superelasticity through thermoelastic martensitic phase transformation and its reverse counterpart.Therefore,shape memory alloys can be used to enhance cement-based materials and components,overcome the defects of poor cracking resistance in traditional cement-based materials,and improve the ability of self-recovery for cracking and deformation in cement-based components.This paper provides a comprehensive overview of shape memory alloy materials in terms of their characteristics and types,shape memory alloy fiber-reinforced cement-based composites,and shape memory alloy bar-reinforced cement-based composite components.It also points out the existing shortcomings in current research and discusses the prospects for the development of shape memory alloy-reinforced cement-based composites.