PSI - Issue 64

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 445–455

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Detection of internal defects in RC structures using GPR and ultrasonic methods Alexander Shuvalov a , Andrey Lapshinov a *, Evgeny Zerkal a , Rinat Zheletdinov a a Moscow State University of Civil Engineering, Yaroslavskoe highway, 26, Moscow, 129337, Russia Abstract The detection of internal defects in reinforced concrete structures is the most important task when conducting surveys of buildings and structures. The ultrasonic research method for studying the structures and determining the possible presence of defects has been known for a long time and has been successfully used to solve various issues directly at construction sites. However, this method has a number of disadvantages, such as the low speed of work and the lack of visual visualization of research results. At the same time, the new technological GPR method is devoid of such disadvantages and, on the contrary, is characterized by high speed and visibility of research results. This article presents the results of field studies of vertical reinforced concrete structures by comparing ultrasonic and GPR methods. As a result of the research, it has been shown that with using of modern non-destructive GPR inspection methods of structures, such internal defects of concreting as pores, cavities, voids and disintegration can be detected efficiently and with high speed. The research results can be presented visually and allow you to more accurately position the location of defects, as well as build 2D and 3D maps of the location of defects. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Concreting; Defect; Dielectrical constant; Flaw; GPR; Ultrasonic; NDT. a © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

* Corresponding author. Tel.: +7 926 565 90 80; fax: +7 495 287 49 14 ext. 560. E-mail address: LapshinovAE@mgsu.ru

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 10.1016/j.prostr.2024.09.283