| 混凝土四重球弹性模量随龄期发展预测模型 |
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| 引用本文： | 刘明辉,王元丰.混凝土四重球弹性模量随龄期发展预测模型[J].北方交通大学学报,2011(1):20-23,27. |
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| 作者姓名： | 刘明辉 王元丰 |
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| 作者单位： | 北京交通大学土木建筑工程学院,北京100044 |
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| 基金项目： | 国家“十一五”科技支撑计划项目资助（2006BAJ06B04）; 交通部西部交通建设科技项目资助（200631822302-08） |
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| 摘 要： | 混凝土的抗压强度和弹性模量随龄期不断增长.然而,与抗压强度相比,弹性模量随龄期的增长并不明显,相关的研究也较少.本文在混凝土弹性模量双重球和三重球预测模型的基础上,考虑了水泥浆体与骨料间的界面过渡区效应,建立了混凝土弹性模量四重球理论模型,且模型能够较好的反映界面过渡区在混凝土弹性模量发展中的作用.分析表明,对混凝土弹性模量发展起到主要作用的参数按重要程度依次为骨料体积分数、骨料粒径及界面过渡区效应.
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| 关 键 词： | 混凝土 界面过渡区 抗压强度 弹性模量 预测模型 |
Four-phase sphere model for elastic modulus of concrete with age |
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| LIU Minghui,WANG Yuanfeng.Four-phase sphere model for elastic modulus of concrete with age[J].Journal of Northern Jiaotong University,2011(1):20-23,27. |
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| Authors: | LIU Minghui WANG Yuanfeng |
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| Institution: | (School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | Compressive strength and elastic modulus of concrete can increase with age.However,compared with compressive strength,little research on increasing of elastic modulus with age is found.In this paper,a four phase sphere model was built up based on the two phase sphere model and the three phase model by considering interfacial transition zone（ITZ）.The model can describe the effect of ITZ on the development of elastics modulus of concrete.The results of parameter analysis show the following parameters have an important effect on the development of elastics modulus： a.aggregate volume fraction,b.aggregate size,c.the effect of ITZ. |
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| Keywords: | concrete interfacial transition zone compressive strength elastic modulus predicting model |
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