拜耳法赤泥特性对水泥砂浆工作性能和力学性能的影响研究  

Study on the effect of Bayer red mud characterization on the working and mechanical properties of cement mortar

作　　者：周丽波 陈平[1,2,3] 胡成 杨义 向玮衡[2,3] 刘荣进 刘骥 明阳[2,3] 梁志锋 夏海洋 ZHOU Libo;CHEN Ping;HU Cheng;YANG Yi;XIANG Weiheng;LIU Rongjin;LIU Ji;MING Yang;LIANG Zhifeng;XIA Haiyang(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;College of Civil and Architectural Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources,Guilin University of Technology,Guilin 541004,China;Guangxi Yufeng Cement Group Co.,Ltd.,Liuzhou 545008,China)

机构地区：[1]桂林理工大学材料科学与工程学院,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004 [3]桂林理工大学广西工业废渣建材资源利用工程技术研究中心,广西桂林541004 [4]桂林理工大学有色金属矿产勘查与资源高效利用协同创新中心,广西桂林541004 [5]广西鱼峰水泥股份有限公司,广西柳州545008

出　　处：《混凝土》2024年第5期130-134,共5页Concrete

基　　金：广西科技计划项目(桂科AD21220052,桂科AD22035126);国家自然科学基金(52062009);广西高校中青年教师科研能力提升项目(2022KY0242,2021KY0262)。

摘　　要：为提高拜耳法赤泥的利用率和附加值,对比研究了不同物化特性的赤泥A和赤泥B对拜耳法赤泥-水泥复合砂浆流动度、力学强度及微结构的影响规律。研究结果表明:赤泥A的最佳掺量为10%,赤泥B的最佳掺量为20%,此时配制的拜耳法赤泥-水泥复合砂浆的力学性能可到达P·O 42.5级水泥标准要求。另外,与赤泥A相比,赤泥B的掺入可赋予复合砂浆具有更高的力学性能,这主要是因为一方面赤泥B的颗粒尺寸较为细小,有助于填充砂浆微孔,提高水泥石密实性,另一方面赤泥B含有更多的Na_(2)O、K_(2)O等游离碱,碱激发作用更为明显,可加快浆体中活性矿物的水化所导致的。In order to improve the utilization rate of Bayer process red mud and added value,it compared different physical and chemi-cal properties of red mud A and red mud B of Bayer process red mud and cement composite mortar fluidity,mechanical strength,and the influence law of microstructure.The research results show that the optimum content of red mud A is 10%,the optimum content of red mud B is 20%,the preparation of Bayer process red mud-mechanical properties of composite cement mortar can be reached P·O 42.5 cement standard strength requirements.In addition,compared with red mud A,the mixed red mud B gives composite mortar has higher mechanical properties,this is mainly because on the one hand,the particle size is relatively small,red mud B help filling slurry pores,improve the den-sity of cement stone,on the other hand,red mud B contains more Na_(2)O、K_(2)O such as free alkali,alkaline excitation effect is more apparent,can accelerate active mineral slurry of hydration.

关 键 词：拜耳法赤泥 复合砂浆 工作性能 力学性能 微结构 

分 类 号：TU528.01[建筑科学—建筑技术科学]