Fire resistance performance of normal and high strength kenaf fibre reinforced concrete
Also available in printed version
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | |
| التنسيق: | Doctoral thesis |
| اللغة: | الإنجليزية |
| منشور في: |
Universiti Teknologi Malaysia
2025
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://utmik.utm.my/handle/123456789/39809 |
| Abstract | Abstract here |
| _version_ | 1854975093801746432 |
|---|---|
| author | Aluko, Oluwatobi Gbenga |
| author2 | Jamaludin Mohamad Yatim, supervisor |
| author_facet | Jamaludin Mohamad Yatim, supervisor Aluko, Oluwatobi Gbenga |
| author_sort | Aluko, Oluwatobi Gbenga |
| description | Also available in printed version |
| format | Doctoral thesis |
| id | utm-123456789-39809 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-398092025-08-21T07:28:01Z Fire resistance performance of normal and high strength kenaf fibre reinforced concrete Aluko, Oluwatobi Gbenga Jamaludin Mohamad Yatim, supervisor Civil engineering Also available in printed version Fibres play notable roles in concrete exposed to extreme temperatures. The high manufacturing cost of convectional fibres and greener initiatives necessitate biofibers in concrete. Concrete under thermal loads is characterized by cracking and pore pressure buildup, resulting in spalling and deterioration. Its retained strength is crucial to structural soundness and serviceability. Past findings indicate that some biofibers could mitigate crack propagation and pore pressure in heated concrete. Also, kenaf fibre has received the Malaysian Government’s attention since 2005 for biocomposite development, and the application of kenaf fibre in concrete for mechanical and durability performance has been studied. However, despite increasing structural usage and fire risk, the residual characteristics of Kenaf Fiber Reinforced Concrete (KFRC) and pore pressure mitigating potential of Kenaf fibre are yet to be studied. Thus, this research presents a report on Kenaf Fibrous Normal Strength (KFNSC) and Kenaf Fibrous High Strength (KFHSC), using an optimum volume (0.75%) and length (25mm), heated for100°C 200°C, 300°C, 400°C, 600°C to 800°C, sustained for 1, 2, and 3 hours, and tested after air cooling. Characterisation of treated kenaf fibre was conducted and validated with microstructure and thermal properties using Scanning Electron Microscope (SEM) and Thermogravimetry Analysis (TGA). Fresh properties of KFNSC and KFHSC were examined, and 1618 samples (cubes, cylinders and prisms) were prepared for the assessment. The KFNSC and KFHSC’s residual physical and mechanical properties and microstructure were determined and compared with Plain Normal Strength Concrete (PNSC) and Plain High Strength Concrete (PHSC). The test results revealed that KFNSC and KFHSC reached their highest compressive strength at 300oC and were thermally stable up to 400oC, compared with PNSC and PHSC. Adding kenaf fibre significantly deterred crack extension at a lower temperature phase and reduced pore pressure buildup at a higher temperature phase, which prevented explosive spalling. However, mechanical properties declined remarkably after 400°C, and the microstructure worsened with increased temperature and exposure duration. Nevertheless, microstructure revealed the potential of kenaf fibre arresting cracks after 600°C for 1-hour exposure. A Gene Expression Programming (GEP)-based prediction model was developed for compressive, split tensile and flexural strength with high accuracy and reliability comparable to experimental data. Kenaf fibre could be an alternative to synthetic fibres in concrete prone to fire attack. The research would offer technical information for biocomposite standards development and application strategy. zulraizam UTM 267 p. Thesis (Doctor of Philosophy (Civil Engineering)) - Universiti Teknologi Malaysia, 2023 2025-03-05T04:54:50Z 2025-03-05T04:54:50Z 2023-11 Doctoral thesis https://utmik.utm.my/handle/123456789/39809 vital:156228 valet-20240313-082030 ENG Closed Access UTM Complete Unpublished Completion application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Civil engineering Aluko, Oluwatobi Gbenga Fire resistance performance of normal and high strength kenaf fibre reinforced concrete |
| thesis_level | PhD |
| title | Fire resistance performance of normal and high strength kenaf fibre reinforced concrete |
| title_full | Fire resistance performance of normal and high strength kenaf fibre reinforced concrete |
| title_fullStr | Fire resistance performance of normal and high strength kenaf fibre reinforced concrete |
| title_full_unstemmed | Fire resistance performance of normal and high strength kenaf fibre reinforced concrete |
| title_short | Fire resistance performance of normal and high strength kenaf fibre reinforced concrete |
| title_sort | fire resistance performance of normal and high strength kenaf fibre reinforced concrete |
| topic | Civil engineering |
| url | https://utmik.utm.my/handle/123456789/39809 |
| work_keys_str_mv | AT alukooluwatobigbenga fireresistanceperformanceofnormalandhighstrengthkenaffibrereinforcedconcrete |