土木与环境工程学报（中英文）2024，Vol.46Issue(2)：176-187,12.DOI:10.11835/j.issn.2096-6717.2022.002
负载纳米TiO2石英砂功能集料-水泥石的界面粘结性能
Interfacial bonding characteristics between quartz sand supported nano-TiO2 functional aggregates and cement paste
摘要
Abstract
Photocatalytic cement-based material is one of the research hotspots of advanced building functional materials,but TiO2 cement-based composites prepared by the traditional internal mixing method have low effective utilization rate of TiO2 and poor economic benefits.To solve this problem,cement mortar with quartz sand supported TiO2(QST)aggregates were prepared and the effects of the QST aggregates on the drying shrinkage performance of the cement mortar was studied.The interfacial bond strength between the QST aggregates and the cement stone was measured using the pull-out strength method.The effects of the nano TiO2 on the hydration products and pore structure of the interfacial transition zone(ITZ)between the aggregates and the cement stone were studied via SEM,EDS and MIP methods.Compared with ordinary quarz sand aggregates,the QST aggregates can reduce the drying shrinkage of the cement mortar and improve the interfacial adhesion between the aggregates and the cement stone.The nano TiO2 that was loaded onto the surface of the aggregates promotes the hydration of the cement paste,reduces the enrichment of Ca(OH)2 in the ITZ,and refines the pore structure of the ITZ between the cement stone and the aggregates.关键词
功能集料/界面黏结力/界面过渡区/水化产物/孔结构Key words
functional aggregate/interfacial bond strength/interfacial transaction zone(ITZ)/hydration product/pore structure分类
建筑与水利引用本文复制引用
王功勋,李雄,邓静,祝明桥,屈锋..负载纳米TiO2石英砂功能集料-水泥石的界面粘结性能[J].土木与环境工程学报（中英文）,2024,46(2):176-187,12.基金项目
the State Scholarship Fund(No.201709480008) （No.201709480008）
Hunan Province Education Scientific Project(No.19A164) （No.19A164）
National Undergraduate Research and Creative Experiment Project(No.S202010534006) （No.S202010534006）
