| 碱-矿渣水泥浆体的碳化过程研究 |
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| 引用本文： | 何娟,杨长辉. 碱-矿渣水泥浆体的碳化过程研究[J]. 华中科技大学学报(自然科学版), 2011, 0(5): 29-33 |
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| 作者姓名： | 何娟 杨长辉 |
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| 作者单位： | 重庆大学材料科学与工程学院; |
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| 基金项目： | 国际合作资助项目(2009DFR50450) |
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| 摘 要： | 针对碱-矿渣水泥水化产物中不存在Ca(OH)2且碳化比较严重的现象,选择水玻璃和NaOH作碱组分,采用X-射线衍射仪和可变真空扫描电子电镜研究了碱-矿渣水泥浆体的碳化产物和微观形貌,结合氮吸附方法分析了碳化对碱-矿渣水泥浆体孔结构的影响.结果表明:碱-矿渣水泥浆体的碳化是CO2直接和水化硅酸钙(C-S-H)凝胶发生作用的结果,碳化后生成的碳酸钙主要以方解石的形式存在;碳化后,C-S-H凝胶的Ca与Si原子比降低,浆体的比表面积增大,平均孔径降低,而累积孔体积的变化情况和碱组分有关.
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| 关 键 词： | 碱-矿渣水泥 浆体 碳化 水玻璃 孔结构 水化硅酸钙 |
Study on carbonation process of alkali-activated slag cement pastes |
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| He Juan Yang Changhui. Study on carbonation process of alkali-activated slag cement pastes[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2011, 0(5): 29-33 |
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| Authors: | He Juan Yang Changhui |
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| Affiliation: | He Juan Yang Changhui(College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China) |
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| Abstract: | As there is no Ca(OH)2 in the hydration products of a lk ali-activated slag cement,and its carbonation is serious,water glass and NaOH were selected as the alkali activater,and X-ray diffraction(XRD) and scannin g electron microscope(SEM) were adopted to study the carbonation and structure of alkali-activated slag cement,while the pore structure was researched by Nit rogen adsorption.The results show that the carbonation takes place directly on the C-S-H gel and calcium carbonate,the carbonated product of a... |
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| Keywords: | alkali-activated slag cement pastes carbona tion water glass pore structure hydrated calcium silicate(C-S-H) |
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