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Comparison of laboratory and field environmental conditioning on FRP-concrete bond durability
HighlightsCFRP-concrete bond was evaluated following field and accelerated conditioning (AC).Direct tension pull-off and notched three-point bending tests were utilized to test the bond.AC resulted in degradation of bond properties.Some field conditioned samples experienced slight degradation between 6 and 18months.ACP at 60°C may result in a pessimistic estimate of bond durability for short service life.
AbstractAssessment of bonded FRP durability by means of accelerated conditioning is sometimes thought to be too harsh compared to ambient environmental conditions; consequently, this may result in underestimate of the actual durability. To assess the efficacy of utilizing accelerated conditioning protocols (ACP) for FRP-concrete bond durability testing, results from laboratory and field conditions (Sunshine Skyway Bridge in Tampa, FL) were compared. Direct tension pull-off test patches were applied to the approach span girders and notched beam three-point bending test specimens were placed on the dolphins adjacent to the bridge. These results were compared to notched beam specimens exposed to ACP. Testing indicated that characteristics of the FRP-concrete bond failure modes changed in some of the field samples within 6months of field exposure, which may be an indication of durability problems. Moreover, ACP under elevated temperatures (60°C) of notched three-point bending test resulted in a 36% loss of strength compared to no strength degradation after 18months of field conditioning.
Comparison of laboratory and field environmental conditioning on FRP-concrete bond durability
HighlightsCFRP-concrete bond was evaluated following field and accelerated conditioning (AC).Direct tension pull-off and notched three-point bending tests were utilized to test the bond.AC resulted in degradation of bond properties.Some field conditioned samples experienced slight degradation between 6 and 18months.ACP at 60°C may result in a pessimistic estimate of bond durability for short service life.
AbstractAssessment of bonded FRP durability by means of accelerated conditioning is sometimes thought to be too harsh compared to ambient environmental conditions; consequently, this may result in underestimate of the actual durability. To assess the efficacy of utilizing accelerated conditioning protocols (ACP) for FRP-concrete bond durability testing, results from laboratory and field conditions (Sunshine Skyway Bridge in Tampa, FL) were compared. Direct tension pull-off test patches were applied to the approach span girders and notched beam three-point bending test specimens were placed on the dolphins adjacent to the bridge. These results were compared to notched beam specimens exposed to ACP. Testing indicated that characteristics of the FRP-concrete bond failure modes changed in some of the field samples within 6months of field exposure, which may be an indication of durability problems. Moreover, ACP under elevated temperatures (60°C) of notched three-point bending test resulted in a 36% loss of strength compared to no strength degradation after 18months of field conditioning.
Comparison of laboratory and field environmental conditioning on FRP-concrete bond durability
Tatar, Jovan (author) / Hamilton, H.R. (author)
Construction and Building Materials ; 122 ; 525-536
2016-06-14
12 pages
Article (Journal)
Electronic Resource
English
FRP , Concrete , Adhesive , Epoxy , Bond , Durability , Field , Accelerated conditioning , Degradation , Bridge engineering
Comparison of laboratory and field environmental conditioning on FRP-concrete bond durability
| Online Contents | 2016
Comparison of laboratory and field environmental conditioning on FRP-concrete bond durability
| British Library Online Contents | 2016