PSI - Issue 70

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ScienceDirect

Procedia Structural Integrity 70 (2025) 89–96

Keywords: crack width, deflection, ductility, energy capacity, rubber shreds, strength. 1. Introduction In modern days, proper removal of worn rubber waste has become an international issue. The practice of burying used rubber tires has spread throughout a number of nations. However, the ecology is seriously threatened by this practice. Therefore, it is imperative to recycle and reuse waste rubber. There have been attempts to make use of used rubber tires for paving, creating artificial reefs, supplying fuel for cement kilns, and creating carbon black [Thomas, B.S. et.al, 2016]. ____________________ Abstract The study evaluates the structural performance of rubberized concrete beams with steel fibre. The key variables were sand-coated rubber shreds as a replacement for coarse aggregates and steel fibres. Seven rectangular beams cast and tested. Cross section of the beam is 250 mm x 150 mm and its length is 3000mm. One beam served as an ordinary reinforced concrete beams, the remaining six beams were cast with pre-treated rubber shreds and 0.5% &1% of steel fibres. The beams were tested under four-point bending over a test span of 2800mm. The study parameters considered for beams included the ultimate load, and deflection at the ultimate load was found under static loading. The results showed that concrete beams with 7.5% rubber shreds and 1.0% steel fibres exhibited a 20.83% increase in ultimate load capacity and a 107.5% improvement in deformation capacity compared to conventional concrete. © 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 the responsibility of International Conference on Structural Integrity Organizers Structural Integrity and Interactions of Materials in Civil Engineering Structures (SIIMCES-2025) Structural Assessment of Rubberized Concrete Beams with Steel Fibre Reinforcements R. Karthikeyan a, *,Tholkapiyan.M. a R.Swathi Rekha a , K.Suguna b a Department of Civil Engineering, Chennai Institute of Technology, Chennai and 600069, India b Department of Civil and Structural Engineering, Annamalai University, Chidambram and 608001, India.

*Corresponding author. Tel: +916380021583 E-mail address: rkarthikeyan@citchennai.net

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 the responsibility of International Conference on Structural Integrity Organizers 10.1016/j.prostr.2025.07.030