Due to non-corrodible nature, fiber-reinforced polymers (FRP) materials are being used as main reinforcement in reinforced and prestressed concrete structures subjected to harsh environmental conditionssuch as bridge decks and barriers, parking garages, and marine structures.
The enhancement in manufacturing techniques yielded new generations of FRP bars and provided a step forward to utilize different fiber types, such as basalt fibers, rather than the commonly used fibers. However, investigations are needed to evaluate the short- and long-term characteristics of these new FRP bars. This investigation aims at characterizing newly developed basalt fiber-reinforced polymer (BFRP) bars and evaluating the bond-dependent coefficient (kb) of these bars.
The investigation included physical and mechanical characterization of sand-coated BFRP bars of 10, 12, and 16 mm-diameters. In addition, 3 beams reinforced with sand-coated BFRP bars of 10, 12, and 16 mm-diameters were constructed and tested to evaluate the bond-dependent coefficient (kb) and compare it with the current design recommendations of the FRP design codes and guides. The test results confirmed that the developed BFRP bars meet the requirements of the CSA S807-10 concerning their physical and mechanical properties. Furthermore, the preliminary beam testing proposed a bond-dependent coefficient (kb) of 0.8 for the tested BFRP bars.
Patrick Vincent, Ehab Ahmed, and Brahim Benmokrane
Department of Civil Engineering, University of Sherbrooke, Sherbrooke, Quebec, Canada
Companies: Mechanical Properties