| 碱金属离子在活性集料中的扩散规律及计算 |
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| 引用本文： | 钱春香,徐文,庄园.碱金属离子在活性集料中的扩散规律及计算[J].建筑材料学报,2011,14(5):669-674. |
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| 作者姓名： | 钱春香 徐文 庄园 |
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| 作者单位： | 东南大学材料科学与工程学院,江苏南京,210096 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)资助项目(2009CB623203) |
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| 摘 要： | 基于现有有效碱定义,进一步提出将进入活性集料的碱定义为有效碱,并根据Fick第二定律建立了碱金属离子在活性集料中的非稳态扩散模型,得到其解析解.应用背散射电子成像法和火焰光度法测定了碱金属元素在活性集料石英玻璃中不同位置的含量.理论计算结果与试验结果对比表明,二者之间具有良好的相关性.
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| 关 键 词： | 有效碱 非稳态扩散 活性集料 混凝土 |
Diffusion Rule and Calculation of Alkali Ions in Reactive Aggregates |
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| QIAN Chun-xiang,XU Wen,ZHUANG Yuan.Diffusion Rule and Calculation of Alkali Ions in Reactive Aggregates[J].Journal of Building Materials,2011,14(5):669-674. |
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| Authors: | QIAN Chun-xiang XU Wen ZHUANG Yuan |
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| Affiliation: | QIAN Chun-xiang,XU Wen,ZHUANG Yuan (College of Materials Science and Engineering,Southeast University,Nanjing 210096,China) |
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| Abstract: | Based on the definition of effective alkali,only the alkali entering reactive aggregates can be defined as effective alkali.In this basis and according to Fick's second law,an unsteady diffusion model of alkali ions in aggregates was built and the analytical solution was obtained.Backscattered electron image and flame photometry were used to measure the alkali metal elements content at different places in reactive aggregates. The experimental results show a good correlation with the theoretical calculation ... |
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| Keywords: | effective alkali unsteady diffusion reactive aggregate concrete |
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