30-04-2011, 03:40 PM
Presented by:
S.KAVITHA
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Strengthening Of Corrosion Inflicted RC Beams Using FRP Wrap
Objective
The loss of stiffness caused by corrosion regained by FRP application
Confine concrete and improve the compressive strength
Decreased corrosion rates due to FRP application
Substantial increase in the ultimate strength
Stress-strain curves for FRP products
Properties of FRP composites
Corrosion damage of a concrete beam
Methodology
Experimental programme
Corrosion infliction
Process of inducing corrosion
Cracks were induced by flexural loading
Salt solution was then ponded over the high moment region
Alternative wetting and drying carried out for 2-3 weeks
Resulting in severe concrete cover delamination
CARBON FRP
FRP wrapping
Constituents of FRP
Resin or polymer - Holds the composite together and influences the physical properties of the end product
Reinforcement (Fibre) - Mechanical strength
Fillers and Additives – Process/performance aids to impart special properties to the end product
FIBER REINFORCEMENT
Good Modulus At High Temperatures
Excellent Stiffness
Brittle
Low Electric Insulating Properties
Resistance to corrosion
METHOD OF BONDING
Wet-lay up
Highly soluble resin is sprayed, poured, or brushed into a mold
Reinforcement is then wet out with resin and placed in the mold
The fibre is then rolled, brushed, or applied to remove entrapped air and to compact it against the mold surface
