地聚合物复合材料断裂性能研究进展  

A review on the fracture properties of geopolymer composites

作　　者：韩旭[1] 张鹏[1] HAN Xu;ZHANG Peng(School of Water Conservancy and Transportation,Zhengzhou University,450001 Zhengzhou,China)

机构地区：[1]郑州大学水利与交通学院,郑州450001

出　　处：《应用力学学报》2024年第1期1-24,共24页Chinese Journal of Applied Mechanics

基　　金：国家自然基金资助项目(No.51979251);河南省杰出青年科学基金资助项目(No.212300410018)。

摘　　要：混凝土的断裂性能直接影响着结构的安全性和耐久性。研究裂缝在混凝土中的扩展规律,是分析混凝土断裂性能的基础。具有非均质和非线性特性的混凝土是一种多相材料,在其内部存在大量初始裂缝,因此混凝土的断裂机理十分复杂,影响因素颇多。目前,普通混凝土断裂性能的分析方法比较成熟,针对混凝土的非线性特性已经建立了两类模型:便于数值分析的缝面软化模型和便于解析计算的等效弹性裂缝模型。此外,地聚合物是一种低碳环保的建筑材料,具有优异的机械性能、耐久性能和耐高温性能。因此,对于地聚合物复合材料(geopolymer composite, GPC)的断裂性能研究是推广其工程应用的必要前提。地聚合物与普通混凝土具有相似的脆性,研究者们基于普通混凝土断裂力学的分析方法,开展了GPC断裂性能的研究。本综述梳理了混凝土断裂力学发展历程,概括了GPC性能的主要影响因素,总结了原材料组成、碱激发剂和纤维对GPC断裂性能的影响,并对GPC断裂性能的未来研究方向进行了展望。The fracture performance of concrete directly affects the safety and durability of the structure.The study on the law of crack propagation in concrete is the basis of analyzing the fracture performance of concrete.The fracture mechanism of concrete is very complicated and there are many influencing factors because concrete is heterogeneous,non-linear,polyphase,and has multiple initial cracks.At present,the fracture performance analysis method of ordinary cement concrete is relatively mature.According to its nonlinear characteristics,cohesive crack models and equivalent elastic fracture models have been established.Geopolymer is a kind of low-carbon and environmentally friendly building material with excellent mechanical properties,durability and high temperature resistance.Researchers carried out a study on the fracture properties of GPC based on the analytical methods of fracture mechanics of ordinary concrete.In this review,the development history of concrete fracture mechanics and the main factors affecting GPC properties are summarized.In addition,the factors affecting fracture properties of GPC are reviewed respectively,including raw material composition,alkali activators and fibers.Furthermore,the future work on the fracture properties of GPC is recommended.

关 键 词：断裂力学 地聚合物复合材料 断裂性能 影响因素 

分 类 号：TU528[建筑科学—建筑技术科学]