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Mechanical Behavior of Clayey Soil Reinforced with Recycled Tire Rubber Using Chips and Fibers

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Abstract

The volume of discarded tires continues to increase each year, becoming a major topic of concern for society. Motivated by this environmental issue, this experimental study aims to evaluate the mechanical behavior and the feasibility of distinct contents (5, 10 and 15% by dry weight of soil) of recycled tire rubber used as chips and fibers for clayey soil reinforcement. Standard Proctor compaction and consolidated-drained triaxial tests under effective stresses of 50, 100 and 150 kPa were accomplished. Regardless of size, 5% rubber addition resulted in similar maximum dry density values, while optimum moisture content is influenced by the specific surface area. Overall, both particle sizes improved the mechanical behavior of natural soil, in which fiber reinforcement leads to superior interfacial bonding. The elastic behavior of clayey soil was enhanced by the residue, wherein the recycled tire rubber incorporation is more efficient for low confining stresses. Notwithstanding the equally satisfactory enhancements obtained by 5% chips and 10% fibers, cohesive intercept was affected by the interaction between rubber size and clayey particles. Even though soil-fiber rubber mixture tends to be a more promising technique in fine soil due to higher incorporation content, both reinforcing agents proved to be a technical and a socio-environmental solution to the problems associated with residues disposal and natural resources exploration.

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Data Availability

All data used during the study are available in a repository in accordance with funder data retention policies: JARAMILLO, N. A. D. 2016. “Mechanical behavior of soils reinforced with tires rubber”. Pontifical Catholic University of Rio de Janeiro, Brazil. Accessed December 17, 2019. https://doi.org/10.17771/PUCRio.acad.27554.

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Acknowledgements

The authors wish to express their gratitude for the financial supports provided from Brazilian government National Council for Scientific and Technological Development (CNPq), for the Universal Research Project, Productivity Research and Ph.D. scholarships, and to the Coordination for the Improvement of Higher Level or Education Personnel (CAPES), for providing the Master scholarship.

Funding

The research was supported by National Council for Scientific and Technological Development (CNPq) and Coordination for the Improvement of Higher Level or Education Personnel (CAPES).

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by NADJ, JWdos SF and MDal TC. The first draft of the manuscript was written by JWdos SF and JACM. The correction in the revised manuscript was made by JWdos SF, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to José Wilson dos Santos Ferreira.

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The authors declare that they have no conflict of interest.

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Jaramillo, N.A.D., dos Santos Ferreira, J.W., Malko, J.A.C. et al. Mechanical Behavior of Clayey Soil Reinforced with Recycled Tire Rubber Using Chips and Fibers. Geotech Geol Eng 40, 3365–3378 (2022). https://doi.org/10.1007/s10706-022-02101-0

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  • DOI: https://doi.org/10.1007/s10706-022-02101-0

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