矿渣基地质聚合物干粉材料的性能与反应机理  

Properties and Reaction Mechism of Blast Furnace Slag Based Geopolymer Dry Powder Materials

作　　者：刘乐平 谭华 邓家喜 匡丕桩[2] 贺艳[2] 

机构地区：[1]广西交通科学研究院广西道路结构与材料重点实验室,南宁530007 [2]广西大学化学化工学院,南宁530004

出　　处：《武汉理工大学学报》2014年第6期36-40,共5页Journal of Wuhan University of Technology

基　　金：广西自然科学基金(2013GXNSFBA019229);广西道路结构与材料重点实验室开放基金(2012gxjgclkf-002)

摘　　要：以矿渣和水玻璃粉体为原料制备地质聚合物干粉材料,研究了水灰比对地质聚合物凝结时间和强度的影响,通过XRD、SEM和FTIR等分析技术系统研究了水玻璃粉体制备矿渣基地质聚合物的物相组成、微观结构和分子结构,分析了水玻璃粉体激发矿渣的反应机理。结果显示,水灰比从0.30增加到0.38,干粉材料的初凝时间从10min增加到22min,终凝时间从13min增加到26min,抗压强度从82.9MPa减少到63.4MPa。微观分析表明水玻璃粉体与矿渣的反应以地质聚合反应为主,矿渣基地质聚合物为无定形的网络结构。Blast furnace slag based geopolymer powders were synthesized by mixing with blast turnace slag ana water glass powders. The effects of water to solid ratio on the setting time and compressive strength of geopolymers were studied. When the ratio of water to solid is 0. 30-0. 38, the initial setting time increases from 10 min to 22 min, the final setting time increases from 13 min to 26 min, and the compressive strength decreases from 82. 9 MPa to 63. 4 MPa. The phase composition, microstructure and molecular structure of slag-based geopolymers were investigated by XRD, SEM and FTIR, respectively. The activation mechanism of slag-based geopolymers was also discussed. The results show that the main reaction between water glass powders and blast furnace slag is geopolymerization reaction, and the blast furnace slag-based geopolymers are amorphous network structure.

关 键 词：矿渣 地质聚合物 水玻璃粉体 反应机理 

分 类 号：TQ174[化学工程—陶瓷工业]