| 水泥混凝土中MgO来源与作用的研究进展 |
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| 引用本文： | 钱觉时,别安涛,李昕成.水泥混凝土中MgO来源与作用的研究进展[J].材料导报,2010,24(11). |
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| 作者姓名： | 钱觉时 别安涛 李昕成 |
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| 作者单位： | 重庆大学材料科学与工程学院,重庆,400045;英国剑桥大学工程系,剑桥;云南建工混凝土有限公司,昆明,650011 |
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| 摘 要： | 分析了混凝土中MgO的来源与形态,比较了不同条件下方镁石的水化动力学,讨论了方镁石在混凝土中的膨胀性能及其影响因素.分析认为方镁石水化动力学可以从理论上解释氧化镁混凝土的膨胀性能,可用于评价氧化镁混凝土的安定性和预测氧化镁混凝土的变形.采用不同方法得出的方镁石水化动力学方程差别很大,有必要对外掺轻烧氧化铗在水泥体系中的水化动力学进行研究.
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| 关 键 词： | MgO 方镁石 水化动力学 膨胀 |
Review of Effect and Different Sources of MgO in Concrete |
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| QIAN Jueshi,BIE Antao,LI Xincheng.Review of Effect and Different Sources of MgO in Concrete[J].Materials Review,2010,24(11). |
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| Authors: | QIAN Jueshi BIE Antao LI Xincheng |
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| Affiliation: | QIAN Jueshi1,BIE Antao1,LI Xincheng2,3(1 College of Material Science and Engineering,Chongqing University,Chongqing 400045,2 Department of Engineering,Cambridge University,Cambridge CB2 1PZ,3 Yunnan Construction Concrete Co.Ltd,Kunming 650011) |
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| Abstract: | The different types of MgO presented in concrete from cement clinker, PFA and BFS, and other MgO added in concrete are analyzed. Hydration kinetics of periclase in different conditions are compared. The in-fluence factors for the periclase expansion are discussed. The expansion of MgO in concrete can be explained by the periclase hydration kinetics and it is affected by periclase content, periclase reactivity, curing temperatures, pH value and the presence of pfa. The necessity of the study on soundness ass... |
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| Keywords: | MgO |
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