Next Article in Journal
Recent Developments in Micro-Structured Fiber Optic Sensors
Previous Article in Journal
A Fiber Optic Fabry–Perot Cavity Sensor for the Probing of Oily Samples
Previous Article in Special Issue
Performance of Hybrid Reinforced Concrete Beam Column Joint: A Critical Review
Article Menu

Export Article

Open AccessArticle
Fibers 2017, 5(1), 2; doi:10.3390/fib5010002

Effect of the Fiber Type and Axial Stiffness of FRCM on the Flexural Strengthening of RC Beams

Department of Civil and Environmental Engineering, University of Windsor, Windsor, ON N9B 3P4, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Mahmoud Reda Taha
Received: 12 September 2016 / Revised: 10 November 2016 / Accepted: 18 December 2016 / Published: 6 January 2017
(This article belongs to the Special Issue Fiber Reinforced Polymers (FRP) for Infrastructure Applications)

Abstract

The use of externally-bonded fiber-reinforced polymer (FRP) sheets has been successfully used in the repair and strengthening of both the shear and flexural capacities of reinforced concrete (RC) beams, slabs and columns since the 1990s. However, the externally-bonded FRP reinforcements still present many disadvantages, such as poor performance in elevated temperature and fire, lack of permeability and strength degradation when exposed to ultraviolet radiation. To remedy such drawbacks, the fiber-/fabric-reinforced cementitious matrix (FRCM) has been recently introduced. The FRCM system consists of a fiber mesh or grid embedded in a cementitious bonding material. The present research investigates the flexural strengthening of reinforced concrete (RC) beams with FRCM. The experimental testing included eight large-scale concrete beams, 150 mm × 250 mm × 2400 mm, internally reinforced with steel bars and strengthened in flexure with FRCM. The investigated parameters were the internal steel reinforcement ratio and the FRCM systems. Two steel reinforcement ratios of 0.18 and 0.36 of the balanced reinforcement ratio, as well as three FRCM systems using glass, carbon and PBO fibers were investigated. Test results are presented in terms of load-deflection, load-strain and load-crack width relationships. The test results indicated that the PBO FRCM significantly increased the ultimate capacity of the strengthened RC beams with both low and moderate internal reinforcement ratios compared to the glass and carbon FRCM. View Full-Text
Keywords: fiber-reinforced cementitious matrix (FRCM); textile-reinforced mortar; glass fiber; strengthening; reinforced concrete (RC) beam; polyparaphenylene benzobisoxazole (PBO); carbon fiber-reinforced cementitious matrix (FRCM); textile-reinforced mortar; glass fiber; strengthening; reinforced concrete (RC) beam; polyparaphenylene benzobisoxazole (PBO); carbon
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Jabr, A.; El-Ragaby, A.; Ghrib, F. Effect of the Fiber Type and Axial Stiffness of FRCM on the Flexural Strengthening of RC Beams. Fibers 2017, 5, 2.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Fibers EISSN 2079-6439 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top