钢渣-矿渣-粉煤灰制备高活性超细矿物掺合料及性能研究  

Preparation and Properties of Ultra-fine Mineral Admixtures with High Activity by Steel Slag-Mineral Slag-Fly Ash

作　　者：明阳 卫煜 李玲 王鹏淮 陈平 胡成 向玮衡 李青 甘国兴 李航 MING Yang;WEI Yu;LI Ling;WANG Peng-huai;CHEN Ping;HU Chen;XIANG Wei-heng;LI Qing;GAN Guo-xing;LI Hang(Guangxi Key Laboratory of New Energy and Building Energy Saving,Guilin 541004,China;College of Civil and Architecture Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin 541004,China)

机构地区：[1]广西建筑新能源与节能重点实验室,桂林市541004 [2]桂林理工大学土木与建筑工程学院,桂林市541004 [3]广西工业废渣建材资源利用工程技术研究中心,桂林市541004

出　　处：《公路》2023年第5期289-295,共7页Highway

基　　金：广西自然科学基金项目,项目编号2020GXNSFBA297034;广西科技重大专项项目,项目编号桂科AA22068073;广西重点研发计划项目,项目编号桂科AB19259008,桂科能22-J-21-20。

摘　　要：针对工业固废资源化利用过程中低活性废渣难应用问题,将钢渣、矿渣和粉煤灰复掺粉磨制备高活性超细矿物掺合料,研究了原料配比和颗粒细度对超细矿物掺合料性能的影响,对超细矿物掺合料使用扫描电镜(SEM)分析微观形貌,使用粒度粒形仪分析粒度粒形,将超细矿物掺合料取代水泥研究其流动性和活性。结果表明:当钢渣∶矿渣∶粉煤灰质量比为3∶5∶2时,采用球磨粉磨90 min可制得平均粒径3.64μm、D_(50)=2.53μm,28 d活性指数可达104%的高活性超细矿物掺合料;超细粉粒径随粉磨时间的增加而降低,超过90 min后粉磨效率降低细度趋于稳定;掺入超细粉体后浆体的流动度略有降低,但对浆体硬化后的结构增强作用明显。In order to solve the problem that low active waste residue is difficult to be applied in the process of industrial solid waste resource utilization,the high active ultra-fine mineral admixture is prepared by grinding steel slag,mineral slag and fly ash mixed powder.In this paper,the influence of the ratio of raw materials and particle fineness on the performance of ultra-fine mineral admixture is studied.The micro-structure of ultra-fine mineral admixture is analyzed by scanning electron microscope(SEM),and the particle shape is analyzed by particle size profilometer.The fluidity and activity of ultra-fine mineral admixture are studied by replacing cement with ultra-fine mineral admixture.Results show that,when the mass ratio of steel slag,mineral slag and fly ash is 3∶5∶2,after grinding 90min,the highly active superfine mineral admixture can be obtained with average particle size of 3.64μm,D_(50)=2.53μm,and 28 d activity index up to 104%.Ultra-fine powder particle size decreases with the increase of grinding time,and becomes stable after 90 min.Adding superfine powders will slightly reduce the fluidity of slurry,but the structure of slurry after hardening is enhanced.

关 键 词：超细矿物掺合料 高活性 矿渣 钢渣 粉煤灰 

分 类 号：TU528.04[建筑科学—建筑技术科学]