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Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete

Recycled rubber waste (RW) is produced at an alarming rate due to the deposition of 1.5 billion scrap tires annually around the globe, which causes serious threats to the environment due to its open land filling issues. This study investigates the potential application of RW in concrete structures f...

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Autores principales: Abbas, Safeer, Ahmed, Ali, Waheed, Ayesha, Abbass, Wasim, Yousaf, Muhammad, Shaukat, Sbahat, Alabduljabbar, Hisham, Awad, Youssef Ahmed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9147491/
https://www.ncbi.nlm.nih.gov/pubmed/35629610
http://dx.doi.org/10.3390/ma15103584
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author Abbas, Safeer
Ahmed, Ali
Waheed, Ayesha
Abbass, Wasim
Yousaf, Muhammad
Shaukat, Sbahat
Alabduljabbar, Hisham
Awad, Youssef Ahmed
author_facet Abbas, Safeer
Ahmed, Ali
Waheed, Ayesha
Abbass, Wasim
Yousaf, Muhammad
Shaukat, Sbahat
Alabduljabbar, Hisham
Awad, Youssef Ahmed
author_sort Abbas, Safeer
collection PubMed
description Recycled rubber waste (RW) is produced at an alarming rate due to the deposition of 1.5 billion scrap tires annually around the globe, which causes serious threats to the environment due to its open land filling issues. This study investigates the potential application of RW in concrete structures for mitigating the alkali–silica reaction (ASR). Various proportions of RW (5%, 10%, 15%, 20%, and 25%) partially replaced the used aggregates. RW was procured from a local rubber recycling unit. Cubes, prisms, and mortar bar specimens were prepared using a mixture design recommended by ASTM C1260 and tested for evaluating the compressive and flexural strengths and expansion in an ASR conducive environment for specimens incorporating RW. It was observed that the compressive and flexural strength decreased for specimens incorporating RW compared to that of the control specimens without RW. For example, an 18% and an 8% decrease in compressive and flexural strengths, respectively, were observed for specimens with 5% of RW by aggregates volume at 28 days. Mortar bar specimens without RW showed an expansion of 0.23% and 0.28% at 14 and 28 days, respectively, indicating the potential ASR reactivity in accordance with ASTM C1260. A decrease in expansion was observed for mixtures incorporating RW. Specimens incorporating 20% of RW by aggregate volume showed expansions of 0.17% at 28 days, within the limit specified by ASTM C1260. Moreover, specimens incorporating RW showed a lower reduction in compressive and flexural strengths under an ASR conducive environment compared to that of the control specimen without RW. Micro-structural analysis also showed significant micro-cracking for specimens without RW due to ASR. However, no surface cracks were observed for specimens incorporating RW. It can be argued that the use of RW in the construction industry assists in reducing the landfill depositing issues with the additional benefit of limiting the ASR expansion.
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spelling pubmed-91474912022-05-29 Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete Abbas, Safeer Ahmed, Ali Waheed, Ayesha Abbass, Wasim Yousaf, Muhammad Shaukat, Sbahat Alabduljabbar, Hisham Awad, Youssef Ahmed Materials (Basel) Article Recycled rubber waste (RW) is produced at an alarming rate due to the deposition of 1.5 billion scrap tires annually around the globe, which causes serious threats to the environment due to its open land filling issues. This study investigates the potential application of RW in concrete structures for mitigating the alkali–silica reaction (ASR). Various proportions of RW (5%, 10%, 15%, 20%, and 25%) partially replaced the used aggregates. RW was procured from a local rubber recycling unit. Cubes, prisms, and mortar bar specimens were prepared using a mixture design recommended by ASTM C1260 and tested for evaluating the compressive and flexural strengths and expansion in an ASR conducive environment for specimens incorporating RW. It was observed that the compressive and flexural strength decreased for specimens incorporating RW compared to that of the control specimens without RW. For example, an 18% and an 8% decrease in compressive and flexural strengths, respectively, were observed for specimens with 5% of RW by aggregates volume at 28 days. Mortar bar specimens without RW showed an expansion of 0.23% and 0.28% at 14 and 28 days, respectively, indicating the potential ASR reactivity in accordance with ASTM C1260. A decrease in expansion was observed for mixtures incorporating RW. Specimens incorporating 20% of RW by aggregate volume showed expansions of 0.17% at 28 days, within the limit specified by ASTM C1260. Moreover, specimens incorporating RW showed a lower reduction in compressive and flexural strengths under an ASR conducive environment compared to that of the control specimen without RW. Micro-structural analysis also showed significant micro-cracking for specimens without RW due to ASR. However, no surface cracks were observed for specimens incorporating RW. It can be argued that the use of RW in the construction industry assists in reducing the landfill depositing issues with the additional benefit of limiting the ASR expansion. MDPI 2022-05-17 /pmc/articles/PMC9147491/ /pubmed/35629610 http://dx.doi.org/10.3390/ma15103584 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abbas, Safeer
Ahmed, Ali
Waheed, Ayesha
Abbass, Wasim
Yousaf, Muhammad
Shaukat, Sbahat
Alabduljabbar, Hisham
Awad, Youssef Ahmed
Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete
title Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete
title_full Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete
title_fullStr Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete
title_full_unstemmed Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete
title_short Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete
title_sort recycled untreated rubber waste for controlling the alkali–silica reaction in concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9147491/
https://www.ncbi.nlm.nih.gov/pubmed/35629610
http://dx.doi.org/10.3390/ma15103584
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