Debonding test method to evaluate bond strength between UHPC and concrete substrate
The use of the pull-off test to evaluate the interfacial bond strength between substrate concrete and bonded materials can result in failure of the concrete substrate without clear indication of the interfacial bond strength. Proper knowledge of the interfacial bond strength between a repair materia...
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| Veröffentlicht in: | Materials and structures 2020-02, Vol.53 (1), Article 15 |
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| creator | Valipour, Mahdi Khayat, Kamal H. |
| description | The use of the pull-off test to evaluate the interfacial bond strength between substrate concrete and bonded materials can result in failure of the concrete substrate without clear indication of the interfacial bond strength. Proper knowledge of the interfacial bond strength between a repair material and concrete substrate is critical for the selection of repair materials and for the modeling of the performance of the composite section. This includes ultra-high performance concrete (UHPC) used for thin bonded overlays of concrete bridge decks. The bond strength of UHPC to concrete substrate sections was evaluated in this study using the pull-off test, a modified version of the pull-off test, and the modified splitting tensile strength test. The results identified some challenges with respect to the characterization of interfacial bond and associated variability of test results. A new test method proposed to determine the interfacial bond strength showed that bond strength can range between 2.3 and 3.5 MPa and low coefficient of variation of 1.4% and 3.4%, respectively. |
| doi_str_mv | 10.1617/s11527-020-1446-6 |
| format | Article |
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Proper knowledge of the interfacial bond strength between a repair material and concrete substrate is critical for the selection of repair materials and for the modeling of the performance of the composite section. This includes ultra-high performance concrete (UHPC) used for thin bonded overlays of concrete bridge decks. The bond strength of UHPC to concrete substrate sections was evaluated in this study using the pull-off test, a modified version of the pull-off test, and the modified splitting tensile strength test. The results identified some challenges with respect to the characterization of interfacial bond and associated variability of test results. 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| language | eng |
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| source | Springer Nature - Complete Springer Journals |
| subjects | Bond strength Bonding strength Bridge decks Building construction Building Materials Civil Engineering Coefficient of variation Concrete bridges Engineering Machines Manufacturing Materials Science Materials selection Original Article Processes Production methods Pull off tests Repair Solid Mechanics Substrates Tensile strength Test methods Theoretical and Applied Mechanics Ultra high performance concrete |
| title | Debonding test method to evaluate bond strength between UHPC and concrete substrate |
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