PSI - Issue 68

ScienceDirect Structural Integrity Procedia 00 (2025) 000–000 Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 68 (2025) 231–237

European Conference on Fracture 2024 Enhancing Crack Resistance and Strength of Recycled Aggregate Concrete with End-of-Life Tire Steel Fibers Asad Zia a, *, Jaroslav Prokop a , Ivan Holly a a University of Technology, Faculty of Civil. Eng., Department of Concrete Structures and Bridges, Bratislava, 81105, Slovakia Abstract An increase in the use of recycled concrete aggregates (RCA) reduces concrete properties. Industrial fibers are proposed to enhance RCA concrete (RAC) but have production emissions and costs. Using waste fibers offers a sustainable solution. Recycled steel fibers from end-of-life tires are a viable option. This study evaluates the efficacy of end-of-life tire steel fibers (EFs) for RAC performance. Concrete with 75% RCA is investigated, with 0.60% industrial steel fibers (IFs) and EFs added. Compressive strength, energy absorption, toughness index, split tensile strength, and water absorption are evaluated. Results show that EFs enhance properties, suggesting potential for sustainable construction practices. © 2025 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 ECF24 organizers Keywords: Recycled aggregate concrete; End-of-life tire steel fibers; Sustainability; Fiber reinforced concrete 1. Introduction The construction sector is a significant contributor to environmental solid waste, both during the construction phase and after the service life of structures ends (Kisku et al., 2017; Shi et al., 2019). Consequently, it plays a major role in the global carbon footprint (Santero et al., 2011). According to Anit et al. (Anike et al., 2020), the concrete industry accounts for approximately 50% of total construction waste, which primarily comes from the extensive use of natural resources. Concrete waste forms a substantial part of construction and demolition (C&D) debris. Arabani and Azarhoosh (Arabani & Azarhoosh, 2012) reported that nearly 75% of global C&D sites consist of concrete waste, with 70% of this waste ending up in landfills, positioning the concrete industry as one of the least sustainable sectors. European Conference on Fracture 2024 Enhancing Crack Resistance and Strength of Recycled Aggregate Concrete with End-of-Life Tire Steel Fibers Asad Zia a, *, Jaroslav Prokop a , Ivan Holly a a University of Technology, Faculty of Civil. Eng., Department of Concrete Structures and Bridges, Bratislava, 81105, Slovakia Abstract An increase in the use of recycled concrete aggregates (RCA) reduces concrete properties. Industrial fibers are proposed to enhance RCA concrete (RAC) but have production emissions and costs. Using waste fibers offers a sustainable solution. Recycled steel fibers from end-of-life tires are a viable option. This study evaluates the efficacy of end-of-life tire steel fibers (EFs) for RAC performance. Concrete with 75% RCA is investigated, with 0.60% industrial steel fibers (IFs) and EFs added. Compressive strength, energy absorption, toughness index, split tensile strength, and water absorption are evaluated. Results show that EFs enhance properties, suggesting potential for sustainable construction practices. © 2025 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 ECF24 organizers Keywords: Recycled aggregate concrete; End-of-life tire steel fibers; Sustainability; Fiber reinforced concrete 1. Introduction The construction sector is a significant contributor to environmental solid waste, both during the construction phase and after the service life of structures ends (Kisku et al., 2017; Shi et al., 2019). Consequently, it plays a major role in the global carbon footprint (Santero et al., 2011). According to Anit et al. (Anike et al., 2020), the concrete industry accounts for approximately 50% of total construction waste, which primarily comes from the extensive use of natural resources. Concrete waste forms a substantial part of construction and demolition (C&D) debris. Arabani and Azarhoosh (Arabani & Azarhoosh, 2012) reported that nearly 75% of global C&D sites consist of concrete waste, with 70% of this waste ending up in landfills, positioning the concrete industry as one of the least sustainable sectors. © 2025 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 ECF24 organizers

* Corresponding author. Tel.: +421-951881403 E-mail address: asad.zia@stuba.sk * Corresponding author. Tel.: +421-951881403 E-mail address: asad.zia@stuba.sk

2452-3216 © 2025 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 ECF24 organizers 2452-3216 © 2025 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 ECF24 organizers

2452-3216 © 2025 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 ECF24 organizers 10.1016/j.prostr.2025.06.047