Experimental Study of Interfacial Bond Properties between CGM and Existing Concrete
To ensure that the cementitious grouting material (CGM) layer and existing concrete work together, the interfacial bond strength between CGM and normal concrete substrate was experimentally investigated by conducting direct and slant shear tests. The effects of connection interface form, concrete st...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/24/12623 |
| _version_ | 1797461629403660288 |
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| author | Yan Han Jiangjiang Wang Enlai Zhang |
| author_facet | Yan Han Jiangjiang Wang Enlai Zhang |
| author_sort | Yan Han |
| collection | DOAJ |
| description | To ensure that the cementitious grouting material (CGM) layer and existing concrete work together, the interfacial bond strength between CGM and normal concrete substrate was experimentally investigated by conducting direct and slant shear tests. The effects of connection interface form, concrete strength, interface shear key, and shear angle on the bond strength of CGM and normal concrete were discussed in detail. The results showed that for composite specimens, the interfacial bond strength was the highest for the triangular interface form, followed by the trapezoidal interface and smooth interface, which had the lowest. The interfacial bond strength increased as the existing concrete’s strength increased; the interfacial bond strength could be greatly improved under shear load in the slant section or when the shear key was set at the interface. Moreover, the interfacial bond strength increased with the increase in the shear angle. The interfacial bond–slip curves were analyzed, and a bond–slip model of the interface between CGM and concrete was proposed. A certain value of interfacial bond stiffness was also recommended. |
| first_indexed | 2024-03-09T17:23:05Z |
| format | Article |
| id | doaj.art-753b6f0360c24879bccb4359e4eb9d1b |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T17:23:05Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-753b6f0360c24879bccb4359e4eb9d1b2023-11-24T13:01:52ZengMDPI AGApplied Sciences2076-34172022-12-0112241262310.3390/app122412623Experimental Study of Interfacial Bond Properties between CGM and Existing ConcreteYan Han0Jiangjiang Wang1Enlai Zhang2School of Civil Engineering, North China University of Technology, Beijing 100144, ChinaChina Construction Eighth Bureau Second Construction Co., Ltd., Jinan 250014, ChinaSchool of Civil Engineering, North China University of Technology, Beijing 100144, ChinaTo ensure that the cementitious grouting material (CGM) layer and existing concrete work together, the interfacial bond strength between CGM and normal concrete substrate was experimentally investigated by conducting direct and slant shear tests. The effects of connection interface form, concrete strength, interface shear key, and shear angle on the bond strength of CGM and normal concrete were discussed in detail. The results showed that for composite specimens, the interfacial bond strength was the highest for the triangular interface form, followed by the trapezoidal interface and smooth interface, which had the lowest. The interfacial bond strength increased as the existing concrete’s strength increased; the interfacial bond strength could be greatly improved under shear load in the slant section or when the shear key was set at the interface. Moreover, the interfacial bond strength increased with the increase in the shear angle. The interfacial bond–slip curves were analyzed, and a bond–slip model of the interface between CGM and concrete was proposed. A certain value of interfacial bond stiffness was also recommended.https://www.mdpi.com/2076-3417/12/24/12623CGMconcreteinterfacial bond behaviorinterface formshear keyshear angle |
| spellingShingle | Yan Han Jiangjiang Wang Enlai Zhang Experimental Study of Interfacial Bond Properties between CGM and Existing Concrete Applied Sciences CGM concrete interfacial bond behavior interface form shear key shear angle |
| title | Experimental Study of Interfacial Bond Properties between CGM and Existing Concrete |
| title_full | Experimental Study of Interfacial Bond Properties between CGM and Existing Concrete |
| title_fullStr | Experimental Study of Interfacial Bond Properties between CGM and Existing Concrete |
| title_full_unstemmed | Experimental Study of Interfacial Bond Properties between CGM and Existing Concrete |
| title_short | Experimental Study of Interfacial Bond Properties between CGM and Existing Concrete |
| title_sort | experimental study of interfacial bond properties between cgm and existing concrete |
| topic | CGM concrete interfacial bond behavior interface form shear key shear angle |
| url | https://www.mdpi.com/2076-3417/12/24/12623 |
| work_keys_str_mv | AT yanhan experimentalstudyofinterfacialbondpropertiesbetweencgmandexistingconcrete AT jiangjiangwang experimentalstudyofinterfacialbondpropertiesbetweencgmandexistingconcrete AT enlaizhang experimentalstudyofinterfacialbondpropertiesbetweencgmandexistingconcrete |