摘要
鉴于目前大量煤炭附产品煤矸石和粉煤灰的资源化处置问题,本文研究了将两者制备成新型胶凝地质聚合物的科学性。地质聚合物水化产物具有三维网络状的类沸石结构,该种结构在稳定/固封重金属离子方面表现出优异的性能。采用水玻璃作为碱性激发剂激发煤矸石、粉煤灰、水泥、硅灰等新型复合硅铝材料,实验采用正交试验设计方法,并借助于XRD,SEM,FT-IR等手段分析了新型地质聚合物的制备机理和固化效果的定性分析。探讨了地质聚合物制备原料的最佳配比为:m(煤矸石)∶m(粉煤灰)=9∶1,硅灰掺量为7%时基体对Cu2+、Pb2+具有较好的固化作用,基体的28 d抗压强度可达40 MPa,此时固封能力较佳。
In terms of a larger number of coal-product of waste disposal problems of resource like coal gangue and fly ash,the scientific of preparing the both things into new gelling geological polymer is sudied. The hydration products of geopolymer have three-dimensional network-like structure of zeolite,which shows superior performance in stabilization / solidification heavy metal ions. Water glass was used as an activator alkaline to activate aluminum composite materials such as coal gangue and fly ash,cement,silica fume. The experiment based on orthogonal experiment and by means of XRD,SEM and FT-IR analysis the preparation mechanism of the novel geopolymer and qualitative analysis of stabilization effect on heavy ions. When the silica fume was added at 7%,coal gangue∶ fly ash ratio of 9,the geopolymer matrix has a good compatibility with both Cu2 ＋and Pb2 ＋,and the compressive strength after 28 d reached40 MPa and the matrix has better stabilization capability.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第11期2935-2939,共5页
Bulletin of the Chinese Ceramic Society
基金
安徽高校省级自然科学重点研究项目(KJ2012A078)
关键词
地质聚合物
煤矸石
重金属离子
固封能力
硅铝相
geological polymer
coal gangue
heavy metal ion
stabilization capability
aluminosilicate phase
作者简介
邹小童（1989-），女，硕士研究生．主要从事新型建筑材料研究
通讯作者：徐子芳，副教授．
