Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand Perspective
End-of-life tires (ELTs) are tires, unusable in their original form, which go into a waste management scheme (for recycling and energy recovery purposes), or otherwise are disposed. In New Zealand, the annual disposal of 3.5 million ELTs is posing critical environmental and socio-economic issues, an...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/17/7824 |
| _version_ | 1797521697505542144 |
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| author | Ali Tasalloti Gabriele Chiaro Arjun Murali Laura Banasiak Alessandro Palermo Gabriele Granello |
| author_facet | Ali Tasalloti Gabriele Chiaro Arjun Murali Laura Banasiak Alessandro Palermo Gabriele Granello |
| author_sort | Ali Tasalloti |
| collection | DOAJ |
| description | End-of-life tires (ELTs) are tires, unusable in their original form, which go into a waste management scheme (for recycling and energy recovery purposes), or otherwise are disposed. In New Zealand, the annual disposal of 3.5 million ELTs is posing critical environmental and socio-economic issues, and the reuse of ELTs through large-volume recycling engineering projects is a necessity. In this study, gravel and recycled granulated rubber were mixed to explore the possibility of obtaining synthetic granular geomaterials (with adequate geotechnical and environmental characteristics) that are suitable as structural fills for geotechnical applications including foundation systems for low-rise light-weight residential buildings. Moreover, an original framework with a set of geo-environmental criteria is proposed for the acceptance of gravel–rubber mixtures (GRMs) as structural fills. It is shown that when gravel-size like rubber particles are used, GRMs with volumetric rubber content of 40% or less have adequate strength (<i>ϕ</i>’ > 30°), low compressibility (ε<sub>v</sub> ≤ 3%), excellent energy adsorption properties, and acceptable leachate metal concentration values (e.g., Zn < 1 mg/L), making them ideal synthetic structural fill materials for many sustainable geotechnical applications. |
| first_indexed | 2024-03-10T08:16:13Z |
| format | Article |
| id | doaj.art-04a5c649f52b420793163e9806d4c92f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T08:16:13Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-04a5c649f52b420793163e9806d4c92f2023-11-22T10:17:02ZengMDPI AGApplied Sciences2076-34172021-08-011117782410.3390/app11177824Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand PerspectiveAli Tasalloti0Gabriele Chiaro1Arjun Murali2Laura Banasiak3Alessandro Palermo4Gabriele Granello5Department of Civil and Natural Resources Engineering, University of Canterbury, Private Bag 4800, Christchurch 8041, New ZealandDepartment of Civil and Natural Resources Engineering, University of Canterbury, Private Bag 4800, Christchurch 8041, New ZealandDepartment of Civil and Natural Resources Engineering, University of Canterbury, Private Bag 4800, Christchurch 8041, New ZealandInstitute of Environmental Science and Research Ltd., Christchurch 8041, New ZealandDepartment of Civil and Natural Resources Engineering, University of Canterbury, Private Bag 4800, Christchurch 8041, New ZealandDepartment of Civil and Natural Resources Engineering, University of Canterbury, Private Bag 4800, Christchurch 8041, New ZealandEnd-of-life tires (ELTs) are tires, unusable in their original form, which go into a waste management scheme (for recycling and energy recovery purposes), or otherwise are disposed. In New Zealand, the annual disposal of 3.5 million ELTs is posing critical environmental and socio-economic issues, and the reuse of ELTs through large-volume recycling engineering projects is a necessity. In this study, gravel and recycled granulated rubber were mixed to explore the possibility of obtaining synthetic granular geomaterials (with adequate geotechnical and environmental characteristics) that are suitable as structural fills for geotechnical applications including foundation systems for low-rise light-weight residential buildings. Moreover, an original framework with a set of geo-environmental criteria is proposed for the acceptance of gravel–rubber mixtures (GRMs) as structural fills. It is shown that when gravel-size like rubber particles are used, GRMs with volumetric rubber content of 40% or less have adequate strength (<i>ϕ</i>’ > 30°), low compressibility (ε<sub>v</sub> ≤ 3%), excellent energy adsorption properties, and acceptable leachate metal concentration values (e.g., Zn < 1 mg/L), making them ideal synthetic structural fill materials for many sustainable geotechnical applications.https://www.mdpi.com/2076-3417/11/17/7824end-of-life tiresrecyclinggravel–rubber mixturessustainable geotechnical applicationsfoundation systems |
| spellingShingle | Ali Tasalloti Gabriele Chiaro Arjun Murali Laura Banasiak Alessandro Palermo Gabriele Granello Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand Perspective Applied Sciences end-of-life tires recycling gravel–rubber mixtures sustainable geotechnical applications foundation systems |
| title | Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand Perspective |
| title_full | Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand Perspective |
| title_fullStr | Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand Perspective |
| title_full_unstemmed | Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand Perspective |
| title_short | Recycling of End-of-Life Tires (ELTs) for Sustainable Geotechnical Applications: A New Zealand Perspective |
| title_sort | recycling of end of life tires elts for sustainable geotechnical applications a new zealand perspective |
| topic | end-of-life tires recycling gravel–rubber mixtures sustainable geotechnical applications foundation systems |
| url | https://www.mdpi.com/2076-3417/11/17/7824 |
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