Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove Fibres
To reduce the carbon footprint of the concrete industry and promote a circular economy, this study explores the reuse of waste materials such as glass powder (GP) and nitrile rubber (NR) fibres in concrete. However, the inclusion of these waste materials results in lower compressive strength compare...
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MDPI AG
2025-07-01
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| author | Zobaer Saleheen Tatheer Zahra Renga Rao Krishnamoorthy Sabrina Fawzia |
| author_facet | Zobaer Saleheen Tatheer Zahra Renga Rao Krishnamoorthy Sabrina Fawzia |
| author_sort | Zobaer Saleheen |
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| description | To reduce the carbon footprint of the concrete industry and promote a circular economy, this study explores the reuse of waste materials such as glass powder (GP) and nitrile rubber (NR) fibres in concrete. However, the inclusion of these waste materials results in lower compressive strength compared to conventional concrete, limiting their application to non-structural elements. To overcome this limitation, this study adopts the concept of confined concrete by developing concrete-filled steel tube (CFST) stub columns. In total, twelve concrete mix variations were developed, with and without steel tube confinement. GP was utilised at replacement levels of 10–30% by weight of cement, while NR fibres were introduced at 0.5% and 1% by volume of concrete. The findings demonstrate that the incorporation of GP and NR fibres leads to a reduction in compressive strength, with a compounded effect observed when both materials are combined. Steel confinement within CFST columns effectively mitigated the strength reductions, restoring up to 17% of the lost capacity and significantly improving ductility and energy absorption capacity. All CFST columns exhibited consistent local outward buckling failure mode, irrespective of the concrete mix variations. A comparison with predictions from existing design codes and empirical models revealed discrepancies, underscoring the need for refined design approaches for CFST columns incorporating sustainable concrete infill. This study contributes valuable insights into the development of eco-friendly, high-performance structural systems, highlighting the potential of CFST technology in facilitating the adoption of waste materials in the construction sector. |
| format | Article |
| id | doaj-art-afad9a3f11d345878b547d57dc9a6e98 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-07-01 |
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| spelling | doaj-art-afad9a3f11d345878b547d57dc9a6e982025-08-20T03:36:31ZengMDPI AGBuildings2075-53092025-07-011515270810.3390/buildings15152708Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove FibresZobaer Saleheen0Tatheer Zahra1Renga Rao Krishnamoorthy2Sabrina Fawzia3Sustainable Engineered Construction Materials (SECM) Research Group, School of Civil and Environmental Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, AustraliaSustainable Engineered Construction Materials (SECM) Research Group, School of Civil and Environmental Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, AustraliaSmart Manufacturing Research Institute (SMRI), Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, MalaysiaSustainable Engineered Construction Materials (SECM) Research Group, School of Civil and Environmental Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, AustraliaTo reduce the carbon footprint of the concrete industry and promote a circular economy, this study explores the reuse of waste materials such as glass powder (GP) and nitrile rubber (NR) fibres in concrete. However, the inclusion of these waste materials results in lower compressive strength compared to conventional concrete, limiting their application to non-structural elements. To overcome this limitation, this study adopts the concept of confined concrete by developing concrete-filled steel tube (CFST) stub columns. In total, twelve concrete mix variations were developed, with and without steel tube confinement. GP was utilised at replacement levels of 10–30% by weight of cement, while NR fibres were introduced at 0.5% and 1% by volume of concrete. The findings demonstrate that the incorporation of GP and NR fibres leads to a reduction in compressive strength, with a compounded effect observed when both materials are combined. Steel confinement within CFST columns effectively mitigated the strength reductions, restoring up to 17% of the lost capacity and significantly improving ductility and energy absorption capacity. All CFST columns exhibited consistent local outward buckling failure mode, irrespective of the concrete mix variations. A comparison with predictions from existing design codes and empirical models revealed discrepancies, underscoring the need for refined design approaches for CFST columns incorporating sustainable concrete infill. This study contributes valuable insights into the development of eco-friendly, high-performance structural systems, highlighting the potential of CFST technology in facilitating the adoption of waste materials in the construction sector.https://www.mdpi.com/2075-5309/15/15/2708Glass PowderNitrile Rubber FibreCFSTstub columncompressive behaviour |
| spellingShingle | Zobaer Saleheen Tatheer Zahra Renga Rao Krishnamoorthy Sabrina Fawzia Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove Fibres Buildings Glass Powder Nitrile Rubber Fibre CFST stub column compressive behaviour |
| title | Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove Fibres |
| title_full | Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove Fibres |
| title_fullStr | Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove Fibres |
| title_full_unstemmed | Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove Fibres |
| title_short | Compressive Behaviour of Sustainable Concrete-Filled Steel Tubes Using Waste Glass and Rubber Glove Fibres |
| title_sort | compressive behaviour of sustainable concrete filled steel tubes using waste glass and rubber glove fibres |
| topic | Glass Powder Nitrile Rubber Fibre CFST stub column compressive behaviour |
| url | https://www.mdpi.com/2075-5309/15/15/2708 |
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