Transition zone studies of new-to-old concrete with different binders |
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| Affiliation: | 1. School of Civil & Environmental Engineering, Yonsei University, Seoul 03722, South Korea;2. Department of Plant and Architectural Engineering, Kyonggi University, Suwon 16227, South Korea;3. Department of Civil and Environmental Engineering, Hannam University, Daejeon 34430, South Korea;1. School of Civil Engineering/Key Laboratory of Coast Civil Structure Safety of China Ministry of Education, Tianjin University, Tianjin 300072, China;2. Beijing Jingxin Lvshi Dry Mix Mortar Co., Ltd., Beijing 102400, China;3. Anhui &Huaihe River Institute of Hydraulic Research, Hefei 230088, China;4. School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China;1. Magnel Laboratory for Concrete Research, Department of Structural Engineering, Faculty of Engineering and Architecture, Ghent University, Tech Lane Ghent Science Park, Campus A, Technologiepark Zwijnaarde 60, 9052 Ghent, Belgium;2. Technology Cluster Construction, Structural Mechanics and Building Materials, Department of Civil Engineering, KU Leuven, Gebroeders De Smetstraat 1, 9000 Ghent, Belgium;1. Graduate School of Engineering, Hokkaido University, Japan;2. Faculty of Engineering, Hokkaido University, Japan;3. Institute of Structural Engineering, Zhejiang University, China;4. Denki Kagaku Kogyo Kabushiki Kaisha (DENKA), Japan;5. Maeda Kosen, Japan;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, PR China;2. Department of Chemistry and Materials, Logistical Engineering University, Chongqing 401311, PR China;1. Key Laboratory for Wind and Bridge Engineering of Hunan Province, College of Civil Engineering, Hunan University, Changsha, China;2. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, China |
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| Abstract: | The weak transition zone between new and old concrete controls many properties of repaired concrete. The transition zone between aggregates and cement pastes of normal concrete has been studied by a number of researchers. But to date, there is little information available about the interfacial zone between new and old concrete. In this paper, major properties of the transition zone between new and old concrete with different binders were studied by using both scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The bond strength was also investigated. The test results show that the binder is a vital factor, which affects the morphology (size and shape), mineralogy and the microstructure of the transition zone in repaired concrete. |
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