Chapter
Apr 26, 2012
Evaluation of the Fracture Properties of the Bond Interfaces between UHTCC Overlays and Concrete Substrates
Authors: Bing Wang [email protected], Jian-Guo Dai [email protected], and Shi-Lang Xu [email protected]Author Affiliations
Publication: Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
Ultra high toughness cementitious composite (UHTCC) overlays can be used for durability repair of deteriorated concrete structures since they have a strain hardening property, super ductility and multiple cracking behaviors. A key issue for this repair technology is the behavior of the interfacial bond between the UHTCC overlay and the concrete substrate. In this paper, the fracture properties of the bond interfaces between UHTCC overlays and concrete substrates were evaluated through four-point bending tests, which were conducted on a series of notched concrete beams externally bonded with UHTCC overlays. The influence of the interface configuration on the interfacial fracture properties was investigated. It was found that a multilayered bonding system with the use of prefabricated UHTCC led to better fracture performance of the bond between the UHTCC overlay and the concrete substrate in terms of both the strength and deformability as compared to a cast-in-situ one. Therefore, such a bonding system may become an ideal solution for the durability repair of aged concrete structures.
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Published In
Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments
Pages: 3512 - 3520
Copyright
© 2010 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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Authors
Affiliations
Structural Engineering Institute, Department of Civil Engineering, Dalian University of Technology, Dalian 116024; China. E-mail: [email protected]
Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.E-mail: [email protected]
Structural Engineering Institute, Department of Civil Engineering, Dalian University of Technology, Dalian 116024; China. E-mail: [email protected]
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