Title : IMPACT-ECHO SCANNING FOR IDENTIFICATION OF DEFECTS IN HIGH STRENGTH CONCRETE SLAB
Authors : K. Sivasubramanian (1), K.P. Jaya (2), M. Neelemegam (3), K. Ramanjaneyulu (1)
Publication : 13th – 16th February 2013
Volume :
Pages : 10-Jan
Price : 250
Abstract : Non-destructive evaluation ensures quality construction and evaluation of the structures. These days, the researchers in the field of non-destructive testing focus on technologies like impact-echo, ultrasonic pulse echo and ground penetrating radar and infrared thermography. Impact-echo is a method which uses acoustic waves to evaluate the quality of concrete or to identify defects. It uses point based data collection which requires enormous time and energy. Also, the post-processing of the results is laborious. One solution to this problem is the application of automatic triggering, data acquisition and live post-processing of the data that is collected. The present work focuses on the impact-echo scanning for identification of defects on a slab. The impact-echo scanner ensures continuous data collection thus saving time. The slab used for the investigation in the present work has six defects. The defects are placed at a depth of 30 mm from the top surface. The impact-echo scanner has been used for the identification of the defects. The results show that the defects can be correctly located using the impact-echo scanner. However, the choice of triggering the solenoid affects the results. The results of the investigation are presented in the paper.