基于微米划痕的水泥基材料断裂韧性测试与分析方法  

Measurement on Fracture Toughness of Cement-Based Materials Based on Micro-Scratch Test

作　　者：姚顺[1,2] 胡传林 何永佳 王发洲[1,2] YAO Shun;HU Chuanlin;HE Yongjia;WANG Fazhou(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]硅酸盐建筑材料国家重点实验室,武汉理工大学,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《硅酸盐学报》2022年第2期452-456,共5页Journal of The Chinese Ceramic Society

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0106300);国家自然科学基金杰出青年基金项目(51925205);武汉市科技计划项目(2020020601012279);高性能土木工程材料国家重点实验室开放基金(2018CEM004)。

摘　　要：水泥基材料脆性突出、易开裂是其工程应用亟须解决的关键难题。对水泥基材料各物相的微观脆性进行解析,并建立与其水泥基材料整体脆性之间的联系,是对水泥基材料进行增韧设计的基础和关键。采用微米划痕实验,获得断裂韧性-位移曲线,并联合高分辨扫描电子显微镜分析划痕区域所对应的物相,实现了水泥浆体及其微观物相断裂韧性的定量表征,从而建立了水泥浆体整体脆性与水化硅酸钙凝胶脆性之间的联系。Cement-based materials are brittle and easy to crack,which are concerned as the key problems to be solved in engineering application.The microscale brittleness of the material phases of cement-based materials needs to be investigated,and a relationship between the micro-scale brittleness and the overall brittleness needs to be established for the toughening design of cement-based materials.In this work,the fracture toughness-displacement curves were obtained via micro-scratch test,and the phases corresponding to the scratch area were analyzed by high resolution scanning electron microscopy,thus charactering quantitatively the fracture toughness of cement paste and its material phases,and establishing the relationship between the overall brittleness of cement paste and the brittleness of calcium silicate hydrate gel.

关 键 词：微米划痕 水化硅酸钙 断裂韧性 水泥基材料 

分 类 号：TU528[建筑科学—建筑技术科学]