Proceedings of the International conference on Applied Research in Engineering,Science and Technology
Year: 2018 | Page No:53-62
The Effect of Different Equations and Methods on R-Square Values of Ndt Correlations
Hadi Abbaszadeh, Serkan Karatosun and Servan Baran
The assessment of compressive strength of RC building to find out their current condition is essential for condition assessment of these building and taking out too much cores for reaching valid results be an expensive method. Non-destructive methods are the way to reduce the amount of charges and to increase the speed of work. However, there is lack of knowledge in literature about using Rebound hammer-Q (Silver Schmidt) and it`s R-square values either in single correlation or in SonReb method. A fifteen-story building that was left half-made around thirty years ago at Istanbul, Turkey was evaluated by Rebound hammer type R and Q, Ultrasonic Pulse Velocity (UPV), and combined SonReb method by both R and Q type Rebounds, and three cores were pulled out in each story in same locations for all buildings. The R-square value was find out in this research for different equations based on EN 13791 standard with three cores in each story of all four building and comparison was made based on R-square values of various correlations among equation types, also. In addition, the effect of using Rebound hammer type Q was illustrated in this paper in single correlation with compressive strength results and combined SonReb method with UPV results.
Keywords: NDT, RC building, Rebound number, R-square, UPV.