| EQUIVALENT MODEL OF EXPANSION OF CEMENT MORTAR UNDER SULPHATE EROSION |
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| 作者单位： | [1]Mechanics and Materials Science Research Center, Ningbo University, Ningbo 315211, China [2]State Key Laboratory of Nonlinear Mechanics （LNM）, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，浙江省自然科学基金 |
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| 摘 要： | The expansion property of cement mortar under the attack of sulfate ions is studied by experimental and theoretical methods. First, cement mortars are fabricated with the ratio of water to cement of 0.4, 0.6, and 0.8. Secondly, the expansion of specimen immerged in sulphate solution is measured at different times. Thirdly, a theoretical model of expansion of cement mortar under sulphate erosion is suggested by virtue of represent volume element method. In this model, the damage evolution due to the interaction between delayed ettringite and cement mortar is taken into account. Finally, the numerical calculation is results indicate that the model perfectly describes performed. The numerical and experimental the expansion of the cement mortar.
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| 关 键 词： | 尺度效应 微空洞 硫酸钠 膨胀理论 |
| 收稿时间： | 24 June 2008 |
EQUIVALENT MODEL OF EXPANSION OF CEMENT MORTAR UNDER SULPHATE EROSION |
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| Authors: | Jue Zhu Minqiang Jiaug Jiankang Chen |
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| Institution: | 1. Mechanics and Materials Science Research Center, Ningbo University, Ningbo 315211, China;2. State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China;1. Department of Renewable Resources, 442 Earth Sciences Building, University of Alberta, Edmonton, AB, Canada T6G 2E3;2. Soil Protection and Recultivation, Brandenburg University of Technology, Cottbus-Senftenberg, P. O. Box 101344, 03013 Cottbus, Germany;1. Department of Neurology, Xuan Wu Hospital, Capital Medical University, Beijing, China;2. Department of Neurology, Fu Xing Hospital, Capital Medical University, Beijing, China;3. Center of Alzheimer''s Disease, Beijing Institute for Brain Disorders, Beijing, China;1. Department of Agroforestry Technology and Science and Genetics, School of Advanced Agricultural and Forestry Engineering, Castilla-La Mancha University, Campus Universitario s/n, CP 02071 Albacete, Spain;2. Centro de Capacitación y Experimentación Forestal, C/ Vadillo-Castril s/n, 23470 Cazorla (Jaén), Spain;3. Department of Plant Production and Agricultural Technology, School of Advanced Agricultural and Forestry Engineering, Castilla-La Mancha University, Campus Universitario s/n, CP 02071 Albacete, Spain;1. Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT 84602, USA;2. US Geological Survey at National Wetlands Research Center, Lafayette, LA 70506, USA |
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| Abstract: | The expansion property of cement mortar under the attack of sulfate ions is studied by experimental and theoretical methods.First,cement mortars are fabricated with the ratio of water to cement of 0.4,0.6,and 0.8.Secondly,the expansion of specimen immerged in sulphate solution is measured at different times.Thirdly,a theoretical model of expansion of cement mortar under sulphate erosion is suggested by virtue of represent volume element method.In this model, the damage evolution due to the interaction between delayed ettringite and cement mortar is taken into account.Finally,the numerical calculation is performed.The numerical and experimental results indicate that the model perfectly describes the expansion of the cement mortar. |
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| Keywords: | size effect microvoids expansion sodium sulfate attack |
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