Title : RADAR FOR THE EVALUATION OF CONCRETE STRUCTURES — INFLUENCE OF REINFORCEMENTS AND DUCTS
Authors : P. Srinivasan(1), K. Ravisankar(1), S. Thirugnanasambandam(2) and Nagesh R. Iyer(1)
Publication : 13th – 16th February 2013
Volume :
Pages : 10-Jan
Price : 250
Abstract : Concrete is widely used for the construction of infrastructure, namely bridges, buildings, power station structures, etc. For both quality control and to inspect the internal structure of concrete, which are in service, non destructive testing (NDT) is widely adopted all over the world. It is used for testing of concrete and as a quality control measure. In Indian conditions, rebound hammer and ultrasonic pulse velocity testing are used in conjunction with the core testing for the evaluation of concrete structures. Most of the time, the structural details of the elements of the reinforced concrete structures are not available and it becomes necessary to use advanced NDT techniques, such as, ground penetrating radar (GPR). It is generally used as a forensic tool for the evaluation of concrete structures. In this study, the minimum spacing of the reinforcement that can be detected by using GPR has been studied using a simulated concrete specimen. Different sizes of reinforcements have been considered. The influence of the reinforcements on the evaluation of ducts has also been studied and reported in this paper.