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Title: Concrete with a High Content of End-of-Life Tire Materials for Flexural Strengthening of Reinforced Concrete Structures
Authors: Polydorou, Thomaida 
Kyriakides, Nicholas 
Lampropoulos, Andreas 
Neocleous, Kyriacos 
Votsis, Renos 
Tsioulou, Ourania 
Pilakoutas, Kypros 
Hadjimitsis, Diofantos G. 
Major Field of Science: Engineering and Technology
Field Category: Civil Engineering
Keywords: Rubberized concrete;Recycled steel fibers;Rubber aggregate;End-of-life tire materials;Strengthening
Issue Date: 1-Sep-2022
Source: Materials, 2022, vol. 15, no. 17, articl. no. 6150
Volume: 15
Issue: 17
Journal: Materials 
Abstract: This research investigates the performance of Steel Fiber Reinforced Rubberized Concrete (SFRRC) that incorporates high volumes of End-of-life tire materials, (i.e., both rubber particles and recycled tire steel fibers) in strengthening existing reinforced concrete (RC) beams. The mechanical and durability properties were determined for an environmentally friendly SFRRC mixture that incorporates a large volume (60% by volume aggregate replacement) of rubber particles and is solely reinforced by recycled tire steel fibers. The material was assessed experimentally under flexural, compressive and impact loading, and thus results led to the development of a numerical model using the Finite Element Method. Furthermore, a numerical study on full-scale structural members was conducted, focusing on conventional RC beams strengthened with SFRRC layers. This research presents the first study where SFRRC is examined for structural strengthening of existing RC beams, aiming to enable the use of such novel materials in structural applications. The results were compared to respective results of beams strengthened with conventional RC layers. The study reveals that incorporation of End-of-life tire materials in concrete not only serves the purpose of recycling End-of-life tire products, but can also contribute to unique properties such as energy dissipation not attained by conventional concrete and therefore leading to superior performance as flexural strengthening material. It was found that by incorporating 60% by volume rubber particles in combination with recycled steel fibers, it increased the damping ratio of concrete by 75.4%. Furthermore, SFRRC was proven effective in enhancing the energy dissipation of existing structural members.
ISSN: 1996-1944
DOI: 10.3390/ma15176150
Rights: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution
Type: Article
Affiliation : Cyprus University of Technology 
ERATOSTHENES Centre of Excellence 
University of Brighton 
University of Sheffield 
Appears in Collections:Publications under the auspices of the EXCELSIOR H2020 Teaming Project/ERATOSTHENES Centre of Excellence

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