Characterisation of the interfacial transition zone in mortars by nanoindentation and scanning electron microscope

Gao Yueyi; Hu Chuanlin; Zhang Yamei; Li Zongjin; Pan Jinlong

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Characterisation of the interfacial transition zone in mortars by nanoindentation and scanning electron microscope

机译：纳米压痕和扫描电镜表征砂浆界面过渡区

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This paper aims to characterise the microstructure and the micro-mechanical properties of the interfacial transition zone (ITZ) in mortars at different water/cement ratios by nanoindentation and scanning electron microscope. Through this study, an insight is provided into the link between the microstructure and the micro-mechanical properties of the ITZ. The thickness of the ITZ was determined from the viewpoint of micro-mechanical properties, as well as from the viewpoint of porosity. The results showed that the average elastic modulus of calcium-silicate-hydrate gel present in the ITZ decreases with the increasing water/cement ratio. Meanwhile, the ratios between the average reduced moduli of the ITZ and the cement paste matrix were quantitatively determined, and the results showed that a lower water/cement ratio led to a thinner ITZ, and a higher ratio between the average reduced moduli of the ITZ and the cement paste matrix.

机译：本文旨在通过纳米压痕和扫描电子显微镜表征不同水灰比下砂浆中界面过渡区（ITZ）的微观结构和微机械性能。通过这项研究，可以深入了解ITZ的微观结构与微观机械性能之间的联系。从微机械性能的观点以及从孔隙率的观点确定ITZ的厚度。结果表明，随着水灰比的增加，存在于ITZ中的水合硅酸钙水凝胶的平均弹性模量降低。同时，定量确定了ITZ与水泥浆基质的平均模量比，结果表明，较低的水灰比导致ITZ变薄，而ITZ的平均模量比较高。和水泥浆基质。

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来源
《Magazine of Concrete Research》 |2018年第18期|965-972|共8页
作者
Gao Yueyi; Hu Chuanlin; Zhang Yamei; Li Zongjin; Pan Jinlong;
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作者单位

Southeast Univ, Jiangsu Key Lab Construct Mat, Nanjing, Jiangsu, Peoples R China;

Wuhan Univ Technol, State Key Lab Silicate Mat Architecture, Wuhan, Hubei, Peoples R China;

Southeast Univ, Jiangsu Key Lab Construct Mat, Nanjing, Jiangsu, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China;

Southeast Univ, Sch Civil Engn, Nanjing, Jiangsu, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
cement; cementitious materials; modulus of elasticity; mortar;

机译：水泥;胶凝材料;弹性模量;砂浆;

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1. Application of nanoindentation testing to study of the interfacial transition zone in steel fiber reinforced mortar [J] . Xiao Hui Wang, Stefan Jacobsen, Jian Ying He Cement and Concrete Research . 2009,第8期

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2. Application of nanoindentation testing to study of the interfacial transition zone in steel fiber reinforced mortar [J] . Xiao Hui Wang, Stefan Jacobsen, Jian Ying He Cement and Concrete Research . 2009,第8期

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3. A novel and compact nanoindentation device for in situ nanoindentation tests inside the scanning electron microscope [J] . Hu Huang, Hongwei Zhao, Jie Mi, AIP Advances . 2012,第1期

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5. Microstructural study of the interfacial transition zone in concrete using backscatter-mode scanning electron microscopy with image analysis. [D] . Huang, Jingdong. 1998

机译：混凝土的界面过渡区的微观结构研究，采用反向散射模式扫描电子显微镜和图像分析。
6. SEM Analysis of the Interfacial Transition Zone between Cement-Glass Powder Paste and Aggregate of Mortar under Microwave Curing [O] . Yaning Kong, Peiming Wang, Shuhua Liu, 2016

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7. A novel and compact nanoindentation device for in situ nanoindentation tests inside the scanning electron microscope [O] . Hu Huang, Hongwei Zhao, Jie Mi, 2012

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8. An Evaluation of the Fracture of Plain Concrete,Fibrous Concrete,and Mortar Using the Scanning Electron Microscope. [R] . aleszka,james schnittgrund,gary 1975

机译：用扫描电子显微镜评价普通混凝土，纤维混凝土和砂浆的断裂。

Characterisation of the interfacial transition zone in mortars by nanoindentation and scanning electron microscope

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