| 摘要: |
| 分析了粗骨料的尺寸对混凝土过渡区界面黏结性能的影响，并通过劈裂抗拉试验、压剪试验获得了粗骨料和硬化水泥浆之间的劈裂抗拉强度及抗剪强度.结果表明：粗骨料的尺寸对界面过渡区的黏结性能有较大的影响，界面黏结强度随粗骨料尺寸的增大而减小；水灰比越低，界面黏结性能越好；粗骨料的类型对界面过渡区黏结性能也有较大性能的影响. |
| 关键词: 尺寸效应 界面过渡区 黏结强度 |
| DOI：10.3969/j.issn.1007 9629.2012.05.025 |
| 分类号: |
| 基金项目:国家重点基础研究发展计划（973计划）项目（2009CB623200）；国家自然科学基金青年基金资助项目（50808043） |
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| Influence of Size Effect on Bonding Performance between Coarse Aggregate and Cement Paste |
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ZHOU Jia jia1, PAN Jin long1, LEUNG C.K.Y2, LI Zong jin2
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1.Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096,China;2.Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong, China
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| Abstract: |
| Concrete is a kind of multiphase material, which consists of three phases, including cement paste, aggregate and the interfacial transition zone(ITZ) between cement paste and aggregate. In the three phases, the interfacial transition zone is the weakest phase, especially the interfacial transition zone between cement paste and coarse aggregate. In this paper, the influence of aggregate size and type on the bonding strength at the ITZ was experimentally investigated. Splitting tensile test and compression shear test were used to obtain the bonding strength and shear strength between aggregate and cement paste. It is found that aggregate size has a great effect on the bonding strength at the ITZ. The bonding strength at ITZ decreases with increasing aggregate size. When the water/cement ratio is lower, it could get higher bonding strength at the ITZ. And also, the aggregate type has a great effect on the bonding strength at the ITZ. |
| Key words: size effect interfacial transition zone(ITZ) bonding strength |
