PSI - Issue 62

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Available online at www.sciencedirect.com

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 62 (2024) 963–971

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Effectiveness of mortar injection repair activity on an existing prestressed bridge girder Effectiveness of mortar injection repair activity on an existing prestressed bridge girder

A. Lupoi a,b , F. Romano b, * A. Lupoi a,b , F. Romano b, *

a Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184, Rome, Italy b SPERI Società di ingegneria e di architettura S.p.A., Lungotevere delle Navi, 19, 00196 Rome, Italy a Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184, Rome, Italy b SPERI Società di ingegneria e di architettura S.p.A., Lungotevere delle Navi, 19, 00196 Rome, Italy

Abstract Abstract

This paper reports the results of an experimental test performed on a prestressed reinforced concrete bridge girder, extracted from an existing bridge of the Italian highway network. The element exhibited cracks damage along the curved tendons of the prestressing system, probably due to the rainwater infiltration into the protecting duct. The experiment consists of a three-point bending test, where a point vertical load is located at mid-span and cyclically increased until bending collapse occurs. Before the test, the cracks pattern has been repaired by high-pressure injection of high-resistance mortar. The test results demonstrate the effectiveness of the mortar injection repair intervention. This paper reports the results of an experimental test performed on a prestressed reinforced concrete bridge girder, extracted from an existing bridge of the Italian highway network. The element exhibited cracks damage along the curved tendons of the prestressing system, probably due to the rainwater infiltration into the protecting duct. The experiment consists of a three-point bending test, where a point vertical load is located at mid-span and cyclically increased until bending collapse occurs. Before the test, the cracks pattern has been repaired by high-pressure injection of high-resistance mortar. The test results demonstrate the effectiveness of the mortar injection repair intervention. © 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 Scientific Board Members © 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 Scientific Board Members Keywords: experimental test; bridge girder; mortar injection; cracks reparation. © 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 Scientific Board Members Keywords: experimental test; bridge girder; mortar injection; cracks reparation.

1. Introduction 1. Introduction

The greatest share of the Italian bridges and viaducts has largely exceeded 50 years of service life. The infrastructures network was designed posing little attention to the structural material durability, thus neglecting the The greatest share of the Italian bridges and viaducts has largely exceeded 50 years of service life. The infrastructures network was designed posing little attention to the structural material durability, thus neglecting the

* Corresponding author. E-mail address: fromano@sperispa.com * Corresponding author. E-mail address: fromano@sperispa.com

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 Scientific Board Member s 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 Scientific Board Member s

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