| 高温对粉煤灰表面解聚作用研究 |
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| 引用本文： | 罗忠涛,马保国,杨久俊,李相国,张磊.高温对粉煤灰表面解聚作用研究[J].中国矿业大学学报,2011(5). |
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| 作者姓名： | 罗忠涛 马保国 杨久俊 李相国 张磊 |
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| 作者单位： | 郑州大学材料科学与工程学院;武汉理工大学硅酸盐材料工程教育部重点实验室;天津城市建设学院材料工程系; |
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| 基金项目： | 国家重点基础研究发展计划(973)(2009CB623201) |
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| 摘 要： | 通过硅铝质胶凝材料高温增钙改性的优化方法,应用电子显微镜(SEM)、核磁共振(NMR)、傅里叶红外光谱(FTIR)等测试手段研究了改性粉煤灰硅铝网络结构的解聚机理与规律.结果表明:高温增钙使粉煤灰表面部分Si-O键断裂,导致高配位的网络中间体Al及Ca较多渗入,网络结构部分强峰的化学位移向低场移动,网络结构聚合度降低,化学活性明显提高.最终优化的高温增钙粉煤灰配比为CFA-4-1 200℃,即81.0%LCFA1+15.0%CaO+3.0%石膏+1.0%萤石,温度制度为1 200℃下0.5 h.
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| 关 键 词： | 粉煤灰 高温 解聚 机理 |
Study of effect of high temperature on depolymerization of fly ash's exterior structure |
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| LUO Zhong-tao,MA Bao-guo,YANG Jiu-jun,LI Xiang-guo,ZHANG Lei.Study of effect of high temperature on depolymerization of fly ash's exterior structure[J].Journal of China University of Mining & Technology,2011(5). |
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| Authors: | LUO Zhong-tao MA Bao-guo YANG Jiu-jun LI Xiang-guo ZHANG Lei |
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| Affiliation: | LUO Zhong-tao1,MA Bao-guo2,YANG Jiu-jun1,3,LI Xiang-guo2,ZHANG Lei3(1.School of Materials Science and Engineering,Zhengzhou University,Zhengzhou,Henan 450052,China,2.Key Laboratory for Silicate Materials Science & Engineering of Ministry of Education,Wuhan University of Technology,Wuhan,Hubei 430070,3.Department of Materials Engineering,Tianjin Institute of Urban Construction,Tianjin 300384,China) |
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| Abstract: | Though optimization method of calcium addition at high-temperature on cementing material made of silicon-aluminum,the depolymerization mechanism and law of silicon-aluminum network structure of modified fly ash were studied using scanning electron microscope(SEM),scanning electron microscope(NMR),fourier transform infrared spectrometer(FTIR).The results show that the Si-O chemical bond of modified fly ash'exterior structure was broken,which led to high infiltration of intermediate such as silicon and alumin... |
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| Keywords: | fly ash high temperature depolymerization mechanism |
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