Influence of water immersion on the bond durability of CFRP-to-concrete and FRCM-to-concrete interfaces

Fuwen Zhang, Jian Guo Dai, Qingfeng Xu, Rundong Gao, Xi Chen, Zhuolin Wang

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

Abstract

This paper mainly focuses on the bond durability of CFRP-to-concrete and FRCM-to-concrete interfaces subjected to moisture attack, which was simulated by water immersion with different durations. Twenty-four notched concrete beams were manufactured with a 150 mm ×150 mm section and a 600 mm span, and were divided into two groups according to two different strengthening methods. The first group was comprised of 12 notched concrete beams strengthened with epoxy bonded CFRP sheet, while the second group was comprised of the rest 12 beams strengthened with CFRP grids bonded using engineered cementitious composites (ECC). For each group, the first three specimens were subjected to a normal environment, and every three of the rest nine specimens were immersed in the water with the temperature of 20 oC for 1 month, 3 months and 6 months, respectively. Test results showed that the shear bond strength of CFRP-to-concrete interfaces increased at the immersion duration of 1 month, but decreased afterwards. After 6 months exposure, the bond strength of the specimens reduced down to the value before exposure. On the other hand, the shear bond strength of FRCM-to-concrete interfaces increased obviously with the immersion duration up to 3 months, but almost kept constant afterwards.

Original languageEnglish
Publication statusPublished - 1 Jan 2017
Event6th Asia-Pacific Conference on FRP in Structures, APFIS 2017 - Singapore, Singapore
Duration: 19 Jul 201721 Jul 2017

Conference

Conference6th Asia-Pacific Conference on FRP in Structures, APFIS 2017
CountrySingapore
CitySingapore
Period19/07/1721/07/17

Keywords

  • Bond durability
  • CFRP-to-concrete interface
  • FRCM-to-concrete interface
  • Notched concrete beam
  • Three-point bending
  • Water immersion

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)

Cite this