Evaluation of the fracture properties of the bond interfaces between UHTCC overlays and concrete substrates

Bing Wang, Jianguo Dai, Shi Lang Xu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)

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.
Original languageEnglish
Title of host publicationEarth and Space 2010
Subtitle of host publicationEngineering, Science, Construction, and Operations in Challenging Environments - Proceedings of the 12th International Conference
Pages3512-3520
Number of pages9
DOIs
Publication statusPublished - 29 Nov 2010
Event12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010 - Honolulu, HI, United States
Duration: 14 Mar 201017 Mar 2010

Conference

Conference12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010
CountryUnited States
CityHonolulu, HI
Period14/03/1017/03/10

Keywords

  • Concrete structures
  • Cracking
  • Substrates

ASJC Scopus subject areas

  • Building and Construction
  • Environmental Engineering

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