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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: EFFECTS OF SEVERE ENVIRONMENTAL EXPOSURE ON COMPRESSIVE BEHAVIOR OF CFRP-CONFINED CONCRETE
Appears on pages(s): 14-27
Keywords: Confinement, Axial Compression, CFRP, Severe Environment
Abstract:The objective of this research is to investigate the influences of severe environment on the behavior and strength of CFRP-confined concrete under uniaxial compression. Monotonic and cyclic compressive tests were conducted on Ø20x45 cm cylindrical concrete samples exposed to laboratory-simulated wet-dry cycles in chloride environment for 6, 13 and 19 months. It has been found that the compressive strength of CFRP-confined concrete was enhanced when compared to unconfined concrete. For the CFRP-confined specimens, compressive strength under monotonic compression increased initially after being exposed to wet-dry cycles for 6 months, but started to deteriorate after longer exposure. On the other hand, compressive strength of the CFRP-confined specimens under cyclic compression increased for all durations of environmental exposure. The environmental reduction factor (ܥா) obtained from the strains in CFRP at failure in specimens exposed to wet-dry cycles were higher than the recommended value in the ACI 440-2R Guideline. Therefore, the recommended values are safe for design of FRP strengthening in both normal and severe environments. In addition, upon inspection of concrete samples with steel reinforcement using the half-cell potential method, it has been suggested that CFRP confinement could help reduce the tendency of steel corrosion in chloride environment.
Thailand Concrete Association, International Partner Access.
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