硅酸盐通报2024，Vol.43Issue(6)：1992-1998,7.
机制砂砂浆界面过渡区特性研究
Characteristics of Interfacial Transition Zone in Manufactured Sand Mortar
摘要
Abstract
The study of interfacial transition zone characteristics in manufactured sand mortar is of great significance in enhancing the strength and durability of manufactured sand mortar.The interface microstructure,microzone mechanical strength,and non-uniform deformation of mortar composed of river sand and manufactured sand were examined through scanning electron microscopy(SEM),nanoindentation,and three-dimensional digital image correlation(3D-DIC)techniques.The results indicate that the width of the interfacial transition zone in manufactured sand mortar exceeds that in river sand mortar.Nevertheless,the interface cracks between fine aggregate particles and mortar matrix are smaller in manufactured sand mortar.Notably,microcracks are prone to occurring at the edges of manufactured sand particles.The elastic modulus of the interfacial transition zone in manufactured sand is slightly higher than that in river sand,suggesting that manufactured sand can mitigate the edge effect of aggregates to a certain extent.The non-uniformity of shrinkage deformation is most conspicuous in sandstone manufactured sand mortar,displaying larger internal tensile strains,ultimately leading to a more severe distribution of damage.This implies that an excessive proportion of blade-shaped particles in fine aggregates may heighten the risk of cracking in mortar.关键词
机制砂/界面过渡区/微观结构/微区力学强度/非均匀变形/损伤分布Key words
manufactured sand/interfacial transition zone/microstructure/microzone mechanical strength/non-uniform deformation/damage distribution分类
建筑与水利引用本文复制引用
陈昊,王怀志,王鹏,肖民,吴娟,唐延丰,李方贤,韦江雄..机制砂砂浆界面过渡区特性研究[J].硅酸盐通报,2024,43(6):1992-1998,7.基金项目
国家重点研发计划(2020YFC1909903) （2020YFC1909903）
广州地铁十号线机制砂混凝土应用技术研究(HT211634) （HT211634）
