粉煤灰基地聚合物的制备及性能研究  

Synthesis and Characterization of Fly Ash-based Geopolymer

作　　者：薛彩红[1] 聂金合 高莉[1] 李小宁[1] 蔡文亮[1] 

机构地区：[1]青海大学机械工程学院,青海西宁810016

出　　处：《非金属矿》2016年第2期5-7,共3页Non-Metallic Mines

基　　金：青海省科技厅应用基础研究计划项目(2013-Z-703);青海省科技厅高新技术研究与发展项目(2014-GX-213)

摘　　要：以电厂废渣Ⅱ级低钙粉煤灰为原料,利用碱激发搅拌法制备了粉煤灰基地质聚合物。当水玻璃模数为1.2,nSi/nAl为1.96,养护温度为60℃时,强度最高为41.13 MPa,体积密度为1.66 g/cm3;水玻璃的模数、nSi/nAl、养护温度对地质聚合物的强度、体积密度影响较大,随着参数的增加,抗压强度都表现为先增加后降低的趋势;粉煤灰地质聚合物XRD谱图与原灰相比,在29.508°处出现非晶的漫散射宽峰,且莫来石、石英衍射峰降低,说明地质聚合反应已发生,形成一种"半晶态"物质。Based on power plant waste residue Ⅱ level low calcium fly ash as raw material, fly ash-based geopolymer was prepared by alkali excitation mixing method. Modulus sodium silicate was 1.2, the nSi/ nAl was 1.96, the curing temperature of 60 ℃, The compressive strength of geopolymer by optimum process was 41.13 MPa, volume density was 1.66 g/cm^3; Modulus of sodium silicate, nSi/ nAl, curing temperature had a great influence on the strength and bulk density of the geopolymer, with the increase of parameters, the compressive strength was first increased after reducing trend; X-ray Diffraction（XRD） of fly ash geopolymer compared with the original grey, at 29.508° amorphous non-reflecting wide peak, and mullite, quartz to reduce the diffraction peak, explain geological polymerization has occurred, ＂semi-crystalline materials＂ was synthesized.

关 键 词：地质聚合物 水玻璃 粉煤灰 抗压强度 

分 类 号：TQ177[化学工程—硅酸盐工业] X773[环境科学与工程—环境工程]