摘要
随着基础设施建设的加快推进,产生了大量的工程开挖废弃红层.红层中含有大量粘土矿物,使得红层经过煅烧处理后具有作为辅助胶凝材料的潜力.废弃红层的资源化再利用有助于缓解水泥生产过程中的高能耗和高污染,以及废弃红层堆积所造成的问题.本文首先将红层在不同温度下进行煅烧,分析了煅烧温度对红层微观结构和火山灰活性的影响.同时,对不同替代比煅烧红层砂浆进行了单轴抗压强度试验,分析了替代比对砂浆力学特性的影响.结果表明,红层的最佳煅烧温度为800℃,混合砂浆不仅满足强度要求,且煅烧红层的加入降低了砂浆的脆性,提升了其刚度和稳定性.
With the acceleration of infrastructure construction,a large amount of excavation waste red-beds have been produced.Red-beds contain a large amount of clay minerals,which makes the red-beds have the potential to be used as supplementary cementitious materials after calcination.The reuse of waste red-beds helps to alleviate the high energy consumption and pollution in the cement production process,as well as the problems caused by waste red-beds accumulation.In this study,the red-beds are calcined at different temperatures,and the effects of calcination temperature on the microstructure and pozzolanic activity of the red-beds are analyzed.At the same time,the uniaxial compressive strength test of calcined red-beds mortar with different replacement ratios is carried out,and the influence of the replacement ratio on the mechanical properties of mortar is analyzed.The results show that the optimum calcination temperature of red-beds is 800℃;the composite mortar meets the strength requirements,and the addition of the calcined red-beds reduces the brittleness of mortar and improves its stiffness and stability.
作者
张科
曾昊洋
张凯
李娜
黄建洪
ZHANG Ke;ZENG Haoyang;ZHANG Kai;LI Na;HUANG Jianhong(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)
出处
《昆明理工大学学报（自然科学版）》
北大核心
2024年第4期59-68,共10页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(42362034)
云南省应用基础研究计划项目(202401AS070068).
关键词
废弃红层
辅助胶凝材料
煅烧温度
替代比
力学性能
waste red-beds
supplementary cementitious materials
calcination temperature
substitution ratio
mechanical property
作者简介
张科(1986-),男,博士,教授,博士生导师.主要研究方向:岩土材料应用、新型建筑材料.E-mail:zhangke_csu@163.com;通信作者:李娜(1994-),女,博士,讲师.主要研究方向:岩石力学与工程应用.E-mail:lina@kust.edu.cn。
