scholarly journals Non-destructive Testing of a 100-Year-Old Reinforced Concrete Flat Slab Bridge

2020 ◽  
Vol 6 ◽  
Author(s):  
Patryk J. Wolert ◽  
Marek K. Kolodziejczyk ◽  
J. Michael Stallings ◽  
Andrzej S. Nowak
Keyword(s):  
Reinforced Concrete ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Flat Slab ◽  
Non Destructive

Techniques of Non-Destructive Testing of Steel Fiber Reinforced Concrete

2017 ◽  
Vol 755 ◽  
pp. 153-158 ◽  
Author(s):  
Eva Zezulová ◽  
Tereza Komárková
Keyword(s):  
Reinforced Concrete ◽  
Large Scale ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Non Destructive Testing ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Destructive Testing ◽  
Measurement Devices ◽  
Non Destructive

Non-destructive testing (NDT) is seeing increasingly frequent use in civil engineering thanks to the fact that the tests are repeatable and do not cause serious damage to the material. The requirements for the development and modernization of available testing devices and methodologies are ever increasing and the testing of existing structures often requires the use of NDT. Unfortunately, every measurement and methodology has its limits and the measurement devices for the evaluation of steel fiber reinforced concrete (SFRC) are no exception. In recent decades there has been an effort to modernize and develop existing measurement devices for SFRC testing. This building material is commonly used especially in large-scale structures. Nevertheless, the technology of SFRC could seem complicated when compared with ordinary concrete and the very nature of this composite material could lead to SFRC inhomogeneity during construction. This paper describes the assessment of SFRC by more or less available methodologies and measurements utilizing non-destructive principles.

scholarly journals Ultrasonic pitch and catch technique for non-destructive testing of reinforced concrete slabs

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Wael A. Zatar ◽  
Hai D. Nguyen ◽  
Hien M. Nghiem
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Point Contact ◽  
Test Method ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Reinforced Concrete Slab ◽  
Reinforced Concrete Slabs ◽  
Rc Slab ◽  
Non Destructive

Abstract This study aims at evaluating reinforced concrete (RC) bridge elements using ultrasonic pitch and catch (UPC) non-destructive testing (NDT) technique. A validation reinforced concrete slab with two embedded layers of rebars and artificial defects (voids, honeycombs, and debondings) was designed and tested. A commercial UPC NDT device (hereafter called “UPC device”), which is based on the ultrasonic shear-wave test method using dry-point-contact transmitting and receiving transducers in a “pitch-catch” configuration, was used to map internal defects of the validation RC slab. The recorded data from the UPC device was analyzed using a modified synthetic aperture focusing technique (SAFT). A software was developed to reconstruct 2-D images of the RC slab cross-sections using novel signal filtering and processing techniques. The results revealed that the 2-D image reconstructed from the developed software accurately exhibited locations and horizontal dimensions of the steel rebars, voids, and debondings. In addition, the developed software was capable to provide much higher resolution and sharper images of the anomalies inside the RC slab compared to the UPC device’s proprietary imaging software.

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