Effects of Using Municipal Solid Waste Incineration Tailings as Lightweight Aggregate on the Mechanical Properties of Specified Density Concrete  

作　　者：SHANG Minggang FENG Qiong ZHANG Yunsheng HE Zhongmao QIAO Hongxia XUE Cuizhen WANG Jinpen HAN Yuehui 尚明刚;冯琼

机构地区：[1]School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China [2]Gansu Advanced Civil Engineering Materials Engineering Research Center,Lanzhou 730050,China [3]College of Science&Technology,Ningbo University,Ningbo 315211,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第5期1229-1245,共17页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.U21A20150,52208249,51878153,52108219,52008196,52178216);Research and Demonstration of Key Technologies of Green and Smart Highways in Gansu Province(No.21ZD3GA002);Gansu Provincial Natural Science Foundation(No.23JRRA799);Key Projects of Chongqing Science and Technology Bureau(No.2021jscx-jbgs0029)。

摘　　要：Municipal solid waste incineration tailings were used as lightweight aggregate(MSWIT-LA)in the preparation of specified density concrete to study the effects on compressive strength,axial compressive strength,flexural strength,microhardness,total number of pores,pore area,and pore spacing.The results showed that the internal curing and morphological effects induced by an appropriate quantity of MSWIT-LA improved the compressive response of specified density concrete specimens,whereas an excessive quantity of MSWIT-LA significantly reduced their mechanical properties.An analysis of pore structure indicated that the addition of MSWIT-LA increased the total quantity of pores and promoted cement hydration,resulting in a denser microstructure than that of ordinary concrete.The results of a principal component analysis showed that the mechanical response of specified density concrete prepared with 25%MSWIT-LA was superior to that of an equivalent ordinary concrete.It was therefore concluded that MSWIT-LA can be feasibly applied to achieve excellent specified density concrete properties while utilising municipal solid waste incineration tailings to protect the environment and alleviate shortages of sand and gravel resources.

关 键 词：municipal solid waste incineration tailings X-ray computed tomography lightweight aggregate MICROHARDNESS principal component analysis 

分 类 号：TU528[建筑科学—建筑技术科学]