PSI - Issue 59

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 59 (2024) 360–366

VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Methodology of Experimental Studies of the Deformed State of a Concrete Pipe Restored Polymer Repair Mix

Vitalii Kovalchuk, Bohdan Parneta, Roman Rybak* Lviv Polytechnic National University, S. Bandery str. 12, 79013 Lviv, Ukraine

© 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 DMDP 2023 Organizers Abstract Experimental studies on the effectiveness of bonding cracks in a damaged concrete pipe using an injectable two component epoxy resin have been conducted. The results of deforming the pipe, restored through injection technology, have been obtained. It was observed that the maximum strain value at which cracks formed outside the restored concrete pipe was 4.92 mm. At the time of pipe failure, the maximum strain value reached 8.09 mm. The findings confirm that the use of injection technology, utilizing two-component epoxy materials, enables the restoration of the operability of defective pipes. Further investigation revealed that, during static testing of the pipe, new cracks formed outside the zone of bonded cracks. These cracks occurred parallel to the bonded cracks in the existing pipe material. © 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 DMDP 2023 Organizers Keywords: concrete pipe, reinforcement, injection, restoration, deformation, bonding, load-bearing capacity 1. Introduction Transport structures constitute a vital infrastructure component, facilitating seamless movement from one location to another. The paramount factor in guaranteeing the secure passage of vehicles lies in the technical integrity of transport structures situated along railway tracks and highways. (Kovalchuk et al., 2022a). One of the most massive transport structures on roads (about one pipe per kilometer) is pipes.

* Corresponding author E-mail address: roman.t.rybak@lpnu.ua

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 DMDP 2023 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 DMDP 2023 Organizers 10.1016/j.prostr.2024.04.051