微硅粉基碱性激发剂制备地质聚合物及其性能研究  

Preparation of Geopolymers by Micro-silica Powder Based Alkaline Activators and Their Properties Study

作　　者：赵恒 王新富 吴求刚 李艳杰 贾亚琪 王彦君 胡荣华 ZHAO Heng;WANG Xinfu;WU Qiugang;LI Yanjie;JIA Yaqi;WANG Yanjun;HU Ronghua(Jiangsu Design Institute of Geology for Mineral Resources(the Testing Center of China National Administration of Coal Geology(CNACG)),Xuzhou 221006,China;Key Laboratory of Mineral Resources in Coal Measures,CNACG,Xuzhou 221006,China;Geochemical Engineering Center,CNACG,Xuzhou 221006,China)

机构地区：[1]江苏地质矿产设计研究院(中国煤炭地质总局检测中心),江苏徐州221006 [2]中国煤炭地质总局煤系矿产资源重点实验室,江苏徐州221006 [3]中国煤炭地质总局地球化学工程中心,江苏徐州221006

出　　处：《金属矿山》2025年第3期269-277,共9页Metal Mine

基　　金：中国煤炭地质总局项目(编号:ZMKJ-2022-JBGS01);中国煤炭地质总局科技创新项目(编号:ZMKJ-2019-J14,ZMKJ-2019-J16,ZMKJ-2020-J04-3,ZMKJ-2023-JBGS02-02);徐州市政策引导类计划(产学研合作)项目(编号:KC21334)。

摘　　要：为厘清不同配比条件下微硅粉基激发剂的激发效果和控制机理,以河道沉积粉煤灰和磷尾矿为原料、新型微硅粉为激发剂制备地质聚合物注浆材料试件,并采用X射线衍射仪、傅里叶变换红外光谱和能谱/扫描电镜等手段对地质聚合物注浆材料的物理力学性能、元素矿物组成和微观组构进行了系统分析。结果表明,利用微硅粉基激发剂制备的地质聚合物注浆材料试件胶结紧密、结石率高、抗压强度高,具有良好的工作性能。微区分析表明,微硅粉基激发剂促进了粉煤灰/磷尾矿中的低聚合度硅铝质反应单体的溶出,促进了Ca^(2+)在地聚物胶体中的富集,微硅粉的微集料效应还优化了地聚物注浆材料的收缩性和宏观力学性能,对地质聚合物反应起到显著的激发和促进作用。In order to clarify the excitation effect and control mechanism of micro silicon powder based activator under different ratio conditions,river deposit fly ash and phosphorus tailings were used as raw materials,novel micro silica powder were used as activator to prepare geopolymer grouting materials.The physical and mechanical properties,element and mineral composition and micro fabric of geopolymer grouting materials were systematically analyzed by means of X-ray diffraction,Fourier transform infrared spectroscopy and energy spectrum/scanning electron microscopy.The results showed that the geopolymer grouting material activated by micro silica powder based activator has tight cementation,high stone rate,high compressive strength and good working performance.Microanalysis showed that micro silica powder based activator promotes the dissolution of oligomeric reaction monomer from fly ash/phosphorus tailings,promotes the enrichment of Ca^(2+)in geopolymer colloid,and significantly improves the stacking compactness,shrinkage and mechanical properties of slurry,which plays a significant role in stimulating and promoting the reaction process of geopolymer.

关 键 词：地质聚合物 微硅粉基激发剂 粉煤灰 磷尾矿 Ca^(2+)富集 微集料效应 

分 类 号：X754[环境科学与工程—环境工程]