Improving the behaviours of expansive soils using recycled tyres
- Authors: Taheri, Abbas , Soltani, Amin , Dastoor, N.
- Date: 2021
- Type: Text , Conference paper
- Relation: 21st NZGS Symposium, Dunedin, New Zealand, 24-26 March 2021, Proceedings of the 21st NZGS Symposium
- Full Text: false
- Reviewed:
Improving the behaviours of expansive soils using recycled tyres
- Authors: Taheri, Abbas , Soltani, Amin , Dastoor, N.
- Date: 2020
- Type: Text , Conference paper
- Relation: 21st NZGS Symposium, Dunedin, New Zealand, 24-26 March 2021, Proceedings of the 21st NZGS Symposium
- Full Text: false
- Reviewed:
- Description: This study reports the results of an experimental investigation into the use of ground rubber (GR) products, at varying contents and sizes/gradations, as a sustainable solution towards improving the inferior geotechnical attributes of a subgrade clay deposit located in Adelaide, South Australia. A total of seven soil–GR mix designs, consisting of one control (i.e., natural soil) and six GR-blended cases (at two GR contents and three GR sizes/gradations), were examined. As a result of GR inclusion, both the maximum dry unit weight and the optimum moisture content manifested a monotonically-decreasing trend; the exhibited reductions were in favour of both a higher GR content and a larger GR size. For any given GR size, the greater the GR content, the higher the developed UCS up to 5% GR, beyond which the dominant GR-to-GR interaction adversely influenced the UCS while still maintaining a notable advantage over the natural soil. The GR inclusions were able to control the soil’s swelling potential. The higher the GR content and/or the larger the GR size, the higher the reduction in swelling. Based on the experimental results, a suitable soil–GR mix design was adopted and applied to stabilise a subgrade clay deposit from a local road in Adelaide, Australia. In-situ field density testing confirmed that the soil–GR mixture is a suitable subgrade material.