PSI - Issue 64

Available online at www.sciencedirect.com 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) 1386–1393 Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Influence of Geogrid on the Flexural Behavior of Cracked Concrete Pavements Abbas S. A. Al-Hedad a , Muhammad N. S. Hadi b,* a PhD, Lecturer, Al-Furat Al-Awast Technical University, Al-Najaf, Iraq b Professor, School of CMEA Engineering, University of Wollongong, Wollongong, NSW 2522, Australia, Abstract This paper investigates the influence of geogrid reinforcement on the flexural behavior of concrete pavements after the initiation of cracks up to failure. Two groups of notched concrete beam specimens with the dimensions of 150 mm × 150 mm × 550 mm were tested. The concrete specimens of the first group were tested under static loads. The concrete specimens of the second group were tested under cyclic loads. The geogrid was placed at a depth of 55 mm from the bottom of the concrete specimens. Test results illustrate that, when cracks are visible in the concrete specimens, the geogrid could maintain the flexural behavior of the concrete pavements within the acceptable service level. The geogrid significantly prolonged the fatigue life of the cracked concrete pavements reinforced with the geogrid. The geogrid increased the maximum cyclic loads of the concrete specimens reinforced with geogrid before eventually failing. The number of geogrid layers used as a flexural resisting material under cyclic loads acts a significant role in improving the behavior of the concrete pavements compared with the specimens reinforced with one layer of geogrid. Keywords: Geosynthetic material; Geogrid; Concrete pavements; Cyclic loads; Fatigue behavior SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Influence of Geogrid on the Flexural Behavior of Cracked Concrete Pavements Abbas S. A. Al-Hedad a , Muhammad N. S. Hadi b,* a PhD, Lecturer, Al-Furat Al-Awast Technical University, Al-Najaf, Iraq b Professor, School of CMEA Engineering, University of Wollongong, Wollongong, NSW 2522, Australia, Abstract This paper investigates the influence of geogrid reinforcement on the flexural behavior of concrete pavements after the initiation of cracks up to failure. Two groups of notched concrete beam specimens with the dimensions of 150 mm × 150 mm × 550 mm were tested. The concrete specimens of the first group were tested under static loads. The concrete specimens of the second group were tested under cyclic loads. The geogrid was placed at a depth of 55 mm from the bottom of the concrete specimens. Test results illustrate that, when cracks are visible in the concrete specimens, the geogrid could maintain the flexural behavior of the concrete pavements within the acceptable service level. The geogrid significantly prolonged the fatigue life of the cracked concrete pavements reinforced with the geogrid. The geogrid increased the maximum cyclic loads of the concrete specimens reinforced with geogrid before eventually failing. The number of geogrid layers used as a flexural resisting material under cyclic loads acts a significant role in improving the behavior of the concrete pavements compared with the specimens reinforced with one layer of geogrid. Keywords: Geosynthetic material; Geogrid; Concrete pavements; Cyclic loads; Fatigue behavior © 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.: +0-612-422-4762; fax:+0-612-422-13238 E-mail address: mhadi@uow.edu.au

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.2024.09.377 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 * Corresponding author. Tel.: +0-612-422-4762; fax:+0-612-422-13238 E-mail address: mhadi@uow.edu.au