Rehabilitation of Reinforced Concrete Beams

Abstract

The concrete structures are often exposed to damage as a result of several factors including, environment, design, and other factors, and because of the high cost and long time needed for reconstruction of the damaged buildings, it become necessary to consider methods for rehabilitation of the damaged structural member in the building. Several methods for repairing the damaged beams are considered in the present work. The technologies of ferrocement, steel plate, fiber carbon reinforced polymer (FCRP), and the technology of the developed nano cement mortar are used in the present work. Twelve reinforced concrete beams (2200x200x150)mm were cast and tested under point load at mid-span to limit the failure. The ultimate strength of rehabilitated concrete beams using the techniques of injecting nano materials in the cracks or having a jacket made from reinforced nano cement mortar exceeds 80% of the ultimate strength of the beam before rehabilitation and exceeds 99% of ultimate strength of the beam before rehabilitation of rehabilitation by fiber carbon reinforced polymer (FCRP) with low cost compared to other techniques that used in research.

Keywords

• Ferrocement
• nano cement mortar
• steel plate