机械力活化粉煤灰制备地聚合物的性能及机理研究  

Mechanical activation of fly ash:effect on performance and mechanism of resulting geopolymer

作　　者：李娜[1,2] 徐中慧[1,2] 李萍[2] 蒋灶 徐亚红[2] 杨飞华[3] 黄阳[1] LI Na;XU Zhonghui;LI Ping;JIANG Zao;XU Yahong;YANG Feihua;HUANG Yang(Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education,Mianyang 621010,China;Noncoal Mine Safety Technology Key Laboratory of Colleges and Universities in Sichuan Province,Southwest University of Science and Technology,Mianyang 621010,China;Beijing Building Material Science Research Institute Co.,Ltd.,Beijing 100041,China)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]西南科技大学非煤矿山安全技术四川省高等学校重点实验室,四川绵阳621010 [3]北京建筑材料科学研究总院有限公司,北京100041

出　　处：《功能材料》2018年第4期4102-4106,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51404200);四川省教育厅青年基金资助项目(13ZB0183);固体废弃处理与资源化教育部重点实验室专职科研创新团队建设基金资助项目(14tdgk04);固废资源化利用与节能建材国家重点实验室开放基金资助项目(SWR-2013-005)

摘　　要：利用机械力球磨激发粉煤灰火山灰活性,研究了机械力活化前后粉煤灰基地聚合物性能变化,并对机械力活化粉煤灰及其地聚合物的形成机理进行分析。结果表明,机械力球磨活化后粉煤灰基地聚合物水化反应速度加快,养护28d后抗压强度提高至79.97MPa,具有更好的抗冻融性能。XRD、FT-IR和SEM分析表明机械力活化前后粉煤灰基地聚合物水化产物主要为无定形凝胶;机械力作用能有效提高粉煤灰活性,使地聚合反应更充分;活化后地聚合物样品结构更加致密,为高性能粉煤灰基地聚合物的工程应用提供理论依据。The pozzolanic activity of coal fly ash was activated by mechanical force ball milling,and the properties of coal fly ash based geopolymer before and after mechanical activation were studied.The formation mechanism of mechanical activated coal fly ash and geopolymer was analyzed.The results indicated that the hydration speed of geopolymerization after mechanical activation was obviously improved and the compressive strength of geopolymer blocks increased to 79.97 MPa after curing for 28 d.Meanwhile,the geopolymer specimens after mechanical activation exhibited even better anti-freeze-thaw performance and appeared more compact.The results of XRD,FT-IR and SEM analysis showed that the main hydration product of the fly ash-based geopolymer was amorphous gel.Mechanochemical method is an effective way to activate the pozzolanic activity of coal fly ash and allow the geopolymerization more sufficient.The structure of the activated geopolymer is more compact,which provides a theoretical basis for the engineering application of high performance coal fly ash based geopolymer.

关 键 词：机械力活化 粉煤灰 地聚合物 机械性能 机理 

分 类 号：TQ172[化学工程—水泥工业]