Prove ultrasoniche su elementi in calcestruzzo rinforzati con fibre di carbonio

CONCU, GIOVANNA;Pani L;TRULLI, NICOLETTA

2010-01-01

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Abstract

Externally bonded Fiber Reinforced Polymeric (FRP) materials have been increasingly used for retrofitting, strengthening and repairing of existing structures (masonry, concrete and reinforced concrete), due to their mechanical and physical properties. However FRP performance is strongly dependent on a proper application. Ultrasonic Technique (UT) seems to be a useful tool for testing the quality of FRP application. This paper reports the preliminary results of an experimental campaign aimed at verifying UT reliability in detecting adhesion FRP/concrete problems and defects. For this purpose 18 small concrete beams have been prepared and strengthened with FRP laminate and FRP sheet materials. During the application of FRP material, some artificial defects have been deliberately settled in FRP/concrete interface realized with PTFE, collect glue and Plastic.