Evaluation of mechanical properties and flexural behavior of FRCM system composed of different types of textile grid and AL powder. (14th March 2022)

• Record Type: Journal Article
• Authors: Jo, Min-Su; Kim, Hyeong-Gook; Lee, Yong-Jun; Kim, Dong-Hwan; Kim, Kil-Hee
• Is Part Of: Construction & building materials. Volume 323(2022)
• Publication Date: 2022-03-14
• Subjects: FRCM composite system -- Weaving method -- Impregnation type -- Aluminum powder coatings -- Debonding failure; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2022.126552
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Mechanical properties of FRCM composites with different types of textile grids. Application of aluminum powder on textile grids surface. Effect of textile characteristics on the strength and toughness of FRCM composites. Investigation on the flexural behavior of RC beams with FRCM composites. Abstract: This experimental work aims to evaluate the flexural strengthening effectiveness of, as well as to mechanical characterize, the different types of textile grid and AL (Aluminum) powder surface coating. The experiment variables were weaving method (Pillar stitch, Leno weave) type of impregnation (SBR, EPOXY), and AL powder surface coating. The mechanical properties of FRCM systems were evaluated by direct tensile and bending tests of FRCM and flexural tests of RC beams. Direct tensile tests of FRCM were performed with clevis grips (AC434.13). Bending tests of FRCM were performed with ASTM C 1609 M. Flexural behavior and performance were analyzed in flexural tests using reinforced concrete beams strengthened with FRCM systems. For flexural tests, nine reinforced concrete beams 2, 500 mm long, 150 mm wide, and 250 mm deep were fabricated. The RC beams were classified into two groups according to the rebar ratio (1.5ρmin, 0.75ρmax ), and consisted of two reference specimens and seven specimens externally strengthened with the FRCM system. Test results showed that the mechanical property of FRCM systems and the flexural capacity of RC beams highly depend on the weaving methods and the impregnation types of textile grids.