Performance of corrosion-aged Reinforced Concrete (RC) beams rehabilitated with Fabric-Reinforced Cementitious Matrix (FRCM)

Mohammed Elghazy, Ahmed El Refai, Usama A. Ebead, Antonio Nanni

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

This paper reports on the feasibility of using fabric-reinforced cementitious matrix (FRCM) systems to rehabilitate corrosion-damaged reinforced concrete (RC) beams. Seven large-scale RC beams were constructed and tested to failure under four-point load configuration. Six beams were subjected to an accelerated corrosion process for 70 days to obtain an estimated mass loss of 10% in the tensile steel reinforcing bars. One virgin beam and one corroded unrepaired beam were used as benchmarks for comparison purpose. The other five corroded beams were repaired before applying the FRCM system. The test parameters included the number of fabric plies (1, 2, and 4) and the strengthening schemes (end-anchored bottom flexural strips and fully U-wrapped flexural strips). Test results showed that corrosion insignificantly reduced the yield and the ultimate strength of the specimen. However, the corroded specimen failed to meet the provisions of the ACI 318 code for crack width criteria. The use of FRCM increased the ultimate capacity of corroded beams between 6% and 46% and their yield strength up to 20% in comparison with those of the control virgin beam. The specimens repaired with U-wrapped FRCM strips showed higher capacity and higher ductility than those repaired with the end-anchored bottom strips having similar number of layers. A higher gain in the flexural capacity and a lower ductility index were reported for specimens with higher amount of FRCM layers.

Original languageEnglish (US)
JournalSustainable Construction Materials and Technologies
Volume2016-August
StatePublished - Jan 1 2016
Event4th International Conference on Sustainable Construction Materials and Technologies, SCMT 2016 - Las Vegas, United States
Duration: Aug 7 2016Aug 11 2016

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Performance of corrosion-aged Reinforced Concrete (RC) beams rehabilitated with Fabric-Reinforced Cementitious Matrix (FRCM)'. Together they form a unique fingerprint.

Cite this