• S.KARUNANIDHI

ABSTRACT Lower tensile and high compressive strength are the basic qualities of Concrete. Even though the elasticity of concrete is relatively constant at low stress levels, at higher stress levels, following crack development, lower elasticity will be observed. Various methods have been reported in literature for strengthening concrete beams to overcome lower tensile strength and crack development. In this research work, Strengthening is carried out through external bonding of carbon fiber mat at the bottom of the concrete beam in U shaped manner till the neutral axis. Epoxy resin and hardener are used as a matrix for holding the fibers in place. Three rectangular concrete beams samples of dimension 100x225x1700mm are cast and experiments have been conducted to analyze, the effect of strengthening on, ultimate load, deflection, moment, curvature, stress and strain. Results of the investigations with single layer and double layer external wrapping of carbon fiber are reported. For this study M20 grade concrete is used as base for implementing strengthening. From the results of the experimental studies it has been concluded that the strength of the reinforced concrete beam can be increased by wrapping it up with single or double layer carbon fiber mat.

Carbon fiber Mat, strengthening, Stiffness, Epoxy resin, neutral axis, Deterioration

"Development of high Performance Concrete Beam Using Carbon Fiber Mat", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.604-613, June-2019, Available :http://www.jetir.org/papers/JETIR1906A87.pdf

"Development of high Performance Concrete Beam Using Carbon Fiber Mat", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp604-613, June-2019, Available at : http://www.jetir.org/papers/JETIR1906A87.pdf