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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Enhanced End Anchorage of Bonded FRP Repairs
Author(s): M.J. Chajes, W.W. Finch, Jr., and H.W. Shenton
Publication: Special Publication
Appears on pages(s): 427-440
Keywords: adhesives; bonding; composite materials; concrete;development length; force transfer
Abstract:When strengthening concrete structures using externally bonded compositematerial plates, the bond between the concrete and plate typically fails well before theplate’s tensile capacity is achieved. To enhance the bond performance, usingcomposite fabric between the plate and the concrete was explored. Six tensiondevelopment specimens were tested to determine the maximum tensile load that couldbe applied to a CFRP plate before it debonded. Three specimens had a Sika CarboDurstrip bonded directly to the concrete, while three others had the CarboDur strip bondedto two plies of Sikawrap Hex 230C fabric material. The fabric was used to distribute theload over a larger bond area. The specimens without fabric failed at an average load of60.5 kN while the specimens with the CFRP fabric failed at an average load of 92.6 kN.These failure loads represent 18 % and 27.5% of the plate capacity respectively.
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