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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: Reinforcement of Hollow Concrete Beams with FRP Bars Made from Recycled Materials
Author(s): Robert J. Thomas and Sulapha Peethamparan
Publication: Special Publication
Appears on pages(s): 311-322
Keywords: fiber-reinforced polymer (FRP); hollow beams; recycled materials; reinforced concrete
Abstract:Fiber-reinforced polymer (FRP) reinforcement for concrete has gained popularity in the past two decades due to its high strength, cyclic load resistance, and insensitivity to chloride corrosion. This paper presents the results of an experimental evaluation of FRP reinforcing bars made completely from recycled materials with two surface conditions: externally bonded helical glass rovings and lathed circumferential grooves. Tensile testing indicated that only grooved bars provided adequate bonding within concrete systems due to bond failure of the external helical rovings under tensile loading. The performance of 1.0 m (39.4 in.) hollow beams reinforced with grooved recycled bars, commercially available FRP bars, and #2 (6.4 mm or 0.25 in.) steel bars was evaluated. Recycled and commercial FRP-reinforced beams had nearly identical performance, indicating that the recycled bars are feasible for use as reinforcement in concrete, although neither FRP-reinforced beam performed as well as steel-reinforced beams.
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