硅酸盐通报2023，Vol.42Issue(12)：4351-4359,4367,10.
偏高岭土在人造水硬性石灰修复砂浆中的应用研究
Application of Metakaolin in Artificial Hydraulic Lime Repair Mortar
摘要
Abstract
In order to prepare a green inorganic restoration material that is suitable for the restoration of historical buildings,based on the XRD test results of the bonding materials of several historical brick masonry buildings in Qingdao,an artificial hydraulic lime repair mortar was prepared by mixing metakaolin.The influence of metakaolin on the artificial hydraulic lime mortar was studied by testing the fluidity,setting time,mass loss rate,dring shrinkage rate and mechanical properties.The results show that metakaolin can reduce the fluidity,shorten the setting time,reduce the dring shrinkage rate and improve the compressive strength and bonding strength of artificial hydraulic lime mortar.When the content is 5.0% and 7.5% (mass fraction),the 56 d compressive strength of artificial hydraulic lime mortar increases by 66.8% and 94.3% ,and the bond strength increases by 22.2% and 25.9% .Finally,XRD and SEM were used to test and analyze the microstructure of the materials.The results show that the main reason for the improvement of the performance of the artificial hydraulic lime mortar by metakaolin is that the active SiO2 and Al2O3 in metakaolin react directly with the lime,and consume Ca(OH)2,which promotes the hydration of cement and enhances the bonding force between the hydrated products and the aggregate.关键词
偏高岭土/水硬性石灰/修复砂浆/历史建筑/物理力学性能/微观结构Key words
metakaolin/hydraulic lime/repair mortar/historical building/physical and mechanical property/microstructure分类
建筑与水利引用本文复制引用
顾立龙,商怀帅,吴亚月,孟维广,侯关豪..偏高岭土在人造水硬性石灰修复砂浆中的应用研究[J].硅酸盐通报,2023,42(12):4351-4359,4367,10.基金项目
国家自然科学基金面上项目(52378245) （52378245）
青岛市科技惠民示范专项项目(23-2-8-cspz-9-nsh) （23-2-8-cspz-9-nsh）
山东省自然科学基金重大基础研究项目(ZR2022ZD33) （ZR2022ZD33）
大学生创新训练项目(S202310429399) （S202310429399）
