偏高岭土强化废弃砖粗骨料再生混凝土的性能研究  

Research on the Performance of Metakaolin Reinforced Waste BrickCoarse Aggregate Recycled Concrete

作　　者：李志强[1] 史飞扬 贺向阳 朱赫 张帅 LI Zhiqiang;SHI Feiyang;HE Xiangyang;ZHU He;ZHANG Shuai(Hebei University of Architecture,Zhangjiakou,Hebei 075000;Hebei Provincial Key Laboratory of Civil Engineering Diagnosis,Transformation,and Disaster Resistance,Zhangjiakou,Hebei 075000)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000

出　　处：《河北建筑工程学院学报》2024年第1期28-33,共6页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：河北建筑工程学院研究生创新基金项目(XY2024023)。

摘　　要：随着我国基建的大力发展,大量的老旧建筑因承载能力不足而被拆除,废弃材料也急剧增多,同时,天然灾害也是建筑物被破坏的重要因素,它会影响建筑材料的使用寿命。废砖占建筑垃圾很大部分,废弃砖的抗压、抗拉性能差,极易破碎被废弃。废弃砖骨料经过破碎、清洗、筛分后被用作再生粗骨料。为研究废弃砖骨料替代率、偏高岭土替代水泥的量、废弃砖再生混凝土的力学及耐久性能,通过SEM电镜等方式,对废弃砖再生骨料混凝土的微观结构进行研究,根据试验发现废弃粘土砖替代率为30%,偏高岭土的掺量为6%时抗压强度最高,再生混凝土的抗氯离子性能较好。With the rapid development of infrastructure in China,a large number of old buildings have been demolished due to insufficient bearing capacity,resulting in a sharp increase in waste materials.At the same time,natural disasters are also another aspect of building damage,affecting the use of building materials.Waste bricks account for a large proportion of construction waste,and their compressive and tensile properties are poor,making them easily broken and often discarded.After crushing,cleaning,and screening,waste brick aggregates are used as recycled coarse aggregates.The research factors include the replacement rate of waste brick aggregates and the amount of metakaolin replacing cement.The mechanical and durability properties of waste brick recycled concrete are studied.According to the experiment,it was found that the replacement rate of waste clay bricks is 30%,and when the content of metakaolin is 6%,the compressive strength is the highest,and the splitting tensile strength is good.The microstructure of recycled aggregate concrete from waste bricks was studied through SEM and other methods.

关 键 词：废弃粘土砖 代替粗骨料 再生混凝土 微观结构研究 

分 类 号：TU528[建筑科学—建筑技术科学]