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Article

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

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Department of Civil Engineering, University of Engineering and Technology, Lahore 54890, Pakistan
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Punjab Intermediate Cities Improvement Investment Program, Lahore 54660, Pakistan
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Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
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Structural Engineering Department, Faculty of Engineering & Technology, Future University in Egypt, New Cairo 11835, Egypt
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Author to whom correspondence should be addressed.
Academic Editor: Miguel Ángel Sanjuán
Materials 2022, 15(10), 3584; https://doi.org/10.3390/ma15103584
Received: 12 April 2022 / Revised: 26 April 2022 / Accepted: 1 May 2022 / Published: 17 May 2022
(This article belongs to the Special Issue Utilisation of Recycled Materials and By-Products 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 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. View Full-Text
Keywords: recycled rubber waste; alkali–silica reaction; ASR environment; expansion recycled rubber waste; alkali–silica reaction; ASR environment; expansion
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MDPI and ACS Style

Abbas, S.; Ahmed, A.; Waheed, A.; Abbass, W.; Yousaf, M.; Shaukat, S.; Alabduljabbar, H.; Awad, Y.A. Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete. Materials 2022, 15, 3584. https://doi.org/10.3390/ma15103584

AMA Style

Abbas S, Ahmed A, Waheed A, Abbass W, Yousaf M, Shaukat S, Alabduljabbar H, Awad YA. Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete. Materials. 2022; 15(10):3584. https://doi.org/10.3390/ma15103584

Chicago/Turabian Style

Abbas, Safeer, Ali Ahmed, Ayesha Waheed, Wasim Abbass, Muhammad Yousaf, Sbahat Shaukat, Hisham Alabduljabbar, and Youssef Ahmed Awad. 2022. "Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete" Materials 15, no. 10: 3584. https://doi.org/10.3390/ma15103584

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