Durability evaluation of shear bond strength of carbon and glass FRP laminates using small plain concrete beams

Davide Mela, Zahra Karim, Matteo Di Benedetti, Antonio Nanni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The bond between external fiber reinforced polymer (FRP) reinforcement and concrete substrate is of critical importance for the effectiveness of this technology. As a result, the design of reinforced concrete (RC) members strengthened with FRP composites is to account for, among other failure modes, the debonding of the laminate from the substrate. Although analytical and experimental research conducted for over two decades has led to archival publications and guides, no standard test methodology is yet available for shear bond strength evaluation after aggressive conditioning. This paper aims at studying the durability of the bond strength between carbon and glass FRP (CFRP and GFRP) laminate and concrete substrate. The set-up consists of a small, plain concrete beam reinforced with an externally-bonded CFRP and GFRP laminate that is tested under three-point bending. The force that the CFRP and GFRP laminate can bear before detaching is thus calculated. The accelerated conditioning, which includes different environments and times of exposure, covers 100 % relative humidity, saltwater, alkali solution and dry heat. Statistical analysis are carried out to obtain statistical evidence on the effect of both the conditioning environment and the time of exposure on shear bond strength.

Original languageEnglish (US)
Title of host publicationCAMX 2014 - Composites and Advanced Materials Expo: Combined Strength. Unsurpassed Innovation.
PublisherThe Composites and Advanced Materials Expo (CAMX)
StatePublished - 2014
EventComposites and Advanced Materials Expo: Combined Strength. Unsurpassed Innovation., CAMX 2014 - Orlando, United States
Duration: Oct 13 2014Oct 16 2014

Other

OtherComposites and Advanced Materials Expo: Combined Strength. Unsurpassed Innovation., CAMX 2014
CountryUnited States
CityOrlando
Period10/13/1410/16/14

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanics of Materials
  • Renewable Energy, Sustainability and the Environment
  • Aerospace Engineering
  • Materials Science(all)

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    Mela, D., Karim, Z., Di Benedetti, M., & Nanni, A. (2014). Durability evaluation of shear bond strength of carbon and glass FRP laminates using small plain concrete beams. In CAMX 2014 - Composites and Advanced Materials Expo: Combined Strength. Unsurpassed Innovation. The Composites and Advanced Materials Expo (CAMX).