Effectiveness of Fabric-Reinforced Cementitious Matrix in Strengthening Reinforced Concrete Beams

Usama Ebead, Kshitij C. Shrestha, Muhammad S. Afzal, Ahmed El Refai, Antonio Nanni

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

This paper reports on the efficiency of fabric-reinforced cementitious matrix (FRCM) in enhancing the flexural capacity and deformational characteristics of RC beams. In the main experimental part of the paper, 12 RC beams, 2,500 mm long, 150 mm wide, and 260 mm deep, were fabricated. The beams had two different steel reinforcement ratios, namely,ρsD12=0.72% andρsD16=1.27%, representing typical underreinforced beam sections. The strengthened beams utilized two FRCM types, carbon and polyparaphenylene benzobisoxazole (PBO) FRCM systems. In the second part of the work, tensile material characterization tests were performed on the FRCM coupons to determine the tensile characteristics of the FRCM composites. The beams were tested in flexure under four-point loading until failure. Two beams without FRCM strengthening were used as a benchmark. Six beams were externally strengthened using one, two, and three layers of carbon FRCM system. Four beams were strengthened with one and two layers of PBO FRCM system. Test results showed that the flexural capacity of the strengthened beams increased by 77% for the carbon FRCM system (three layers) and to 27% for the PBO FRCM system (two layers) over that of their benchmark (unstrengthened) beams.

Original languageEnglish (US)
Article number04016084
JournalJournal of Composites for Construction
Volume21
Issue number2
DOIs
StatePublished - Apr 1 2017

Keywords

  • Cementitious materials
  • Fabric-reinforced cementitious mortar
  • Flexural strengthening
  • Reinforced concrete beams
  • Strengthening
  • Textile-reinforced mortar

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering

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