| 摘要: |
| 通过背散射电子图像分析结合纳米压痕技术研究了等强混凝土界面过渡区性能.结果表明:矿物掺合料不同程度改善了等强混凝土界面过渡区性能，同时也增加了其非匀质性.双掺偏高岭土和石灰石粉可减小等强混凝土界面过渡区的厚度，明显降低其弹性模量增长幅度，但提高了基体的弹性模量，而粉煤灰仅仅降低了等强混凝土界面过渡区弹性模量的增长幅度. |
| 关键词: 等强混凝土 背散射电子图像分析 纳米压痕 界面过渡区 弹性模量 |
| DOI：103969/jissn1007 9629201406025 |
| 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） |
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| Nanoindentation Characteristics of Interfacial Transition Zones in Concrete under Equal Compressive Strength |
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HE Zhihai1, QIAN Chunxiang2, ZHANG Yi2, ZHAO Fei2
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1.College of Civil Engineering, Shaoxing University, Shaoxing 312000, China;2.College of Materials Science and Engineering, Southeast University, Nanjing 211189, China
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| Abstract: |
| The performances of interfacial transition zones(ITZ) in concrete under equal compressive strengths were studied quantitatively by the backscattered electron image analysis and nanoindentation. The results indicate that mineral admixtures improve the performances of ITZ to the different degree, also increase the heterogeneities; a mixture of metakaolin(MK) and limestone powder(LP) can decrease the thickness of ITZ, and reduce the increase value of elastic modulus remarkably, and meanwhile it improves the elastic modulus in matrix; however, the improving function of fly ash(FA) on ITZ shows the decrease of the increase value of elastic modulus only. |
| Key words: concrete under equal compressive strength backscattered electron image analysis nanoindentation interfacial transition zone elastic modulus |
