Strengthening of fire damaged reinforced beams by using ferro cement

Abstract

Now-a-days repair and rehabilitation of the existing structures in developing countries has become solitary of the most thought-provoking tasks in Civil Engineering sector. Imperfections, fiasco and general distress in the structures can be the outcome of fundamental deficiency produced by inaccurate design, poor workmanship or overloading of the construction. It can also be instigated by corrosion, fire and natural calamities. A spoiled or distrait structure can be modernized to an acceptable level of performance at a reasonable cost by different approaches is called retrofitting. One of these techniques consists of strengthening fire damaged concrete beams by applying Ferro cement with wire mesh. Two types of Ferro cement with wire mesh are used with single layer and double layer in beam. One third point load test according to ASTM C78-02 is performed to measure the flexure performance of four specimens. The ultimate load carrying capacity for using the single layer Ferro cement strengthening, double layer Ferro cement strengthening showed an improvement of 46% and 72% respectively over the fire damaged specimens.

Keywords

• Fire
• Ferro cement
• Weir mesh
• Flexural strength
• Erroneous design

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