Theoretical Calculation of ITZ Volume Fraction and Morphological Characterization of Crushed Stone in Concrete

作     者：ZHANG Jianjian PENG Liang ZHANG Guoqiang SUN Guowen LIU Zhiyong 张建建;PENG Liang;ZHANG Guoqiang;孙国文;LIU Zhiyong

作者机构：School of Civil EngineeringHarbin Institute of TechnologyHarbin 150090China School of Materials Science and EngineeringShijiazhuang TieDao UniversityShijazhuang 050043China Foundational Subjects DepartmentShijiazhuang TieDao University SiFang CollegeShijiazhuang 051132China School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2022年第37卷第4期

页      面：656-665页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：Funded by the National Natural Science Foundations of China(No.52178237) the Graduate Innovation Fund of Shijiazhuang Tie Dao University(YC2021064) 

主　　题：crushed stone sphericity interfacial transition zone image processing concrete 

摘      要：According to the morphological characteristics of crushed stone,the sphericity was introduced to establish the theoretical calculation model of volume fraction of interfacial transition zone(ITZ)around crushed *** sphericity of crushed stone was obtained by image processing technology and numerical *** experimental results show that when the maximum particle size of coarse aggregate is less than 31.5 mm,the practical sphericity is generally around 0.75,while the sphericity of sand is generally above *** the closer to 1 the practical sphericity is,the smaller the ITZ volume fraction(V_(ITZ))is,that is,the closer to spherical shape the aggregate is,the lower the ITZ content in concrete *** V_(ITZ) and ITZ thickness in concrete and mortar have a linear relationship,and the ITZ content in concrete is lower than that in mortar at the same aggregate volume fraction.