Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperature
The low cost of basalt and steel fibers makes their use in enhancing concrete properties very attractive, this paper presents experimental research on the use of Basalt Fibers (BF) and Steel Fibers (SF) and their effect on compressive, tensile, and flexural behavior of reinforced concrete beams unde...
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Sustainable Development Press Limited
2024-09-01
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| Series: | Sustainable Structures |
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| author | Ahmed Ashteyat Ala Obaidat Tarik Kharabsheh Ahmed Harahsheh |
| author_facet | Ahmed Ashteyat Ala Obaidat Tarik Kharabsheh Ahmed Harahsheh |
| author_sort | Ahmed Ashteyat |
| collection | DOAJ |
| description | The low cost of basalt and steel fibers makes their use in enhancing concrete properties very attractive, this paper presents experimental research on the use of Basalt Fibers (BF) and Steel Fibers (SF) and their effect on compressive, tensile, and flexural behavior of reinforced concrete beams under normal and elevated temperatures. Nineteen beams, 114 cubes, and 114 cylinders were tested to find the optimum percentage of fibers. The percentages of BF used were 1%, 2%, and 3.5% by cement weight, while the percentages of SF were 0%, 0.5%, 1%, and 1.5%. Heated samples were subjected to 600 ℃ for 3 hours and left to cool off naturally before testing. The test results show that using BF and SF significantly increased the tensile strength of unheated cylinders, with the optimum fiber content of 1% BF - 1.5% SF achieving an increase of 163% over the control. For heated cylinders, the optimum fiber content was (2% BF - 1.5% SF) achieving an increase of 175%. For compressive strength, enhancement was more modest for most of the fiber content ratios used, and the optimum mix of (1% BF - 1% SF) achieved an enhancement for unheated and heated conditions of 27% and 44%, respectively. Flexural results show that beams employing a mix of 2% BF and 1% SF yielded the most favorable result at normal temperature, enhancing the capacity by 27% compared to the control. While at high temperatures, using an optimum mix of 1% BF and 1.5% SF achieved a 27.2% increase compared to control. The use of BF and SF in concrete has also been proven to increase the ductility of the beams and has moved the failure mode from shear to flexural failure. |
| format | Article |
| id | doaj-art-0bf41b7223544f71bfc4f9e837f8b0da |
| institution | Kabale University |
| issn | 2789-3111 2789-312X |
| language | English |
| publishDate | 2024-09-01 |
| publisher | Sustainable Development Press Limited |
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| series | Sustainable Structures |
| spelling | doaj-art-0bf41b7223544f71bfc4f9e837f8b0da2025-02-01T08:47:17ZengSustainable Development Press LimitedSustainable Structures2789-31112789-312X2024-09-012410.54113/j.sust.2024.000051Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperatureAhmed Ashteyat0Ala Obaidat1Tarik Kharabsheh2Ahmed Harahsheh3Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia.Civil Engineering Department, Philadelphia University, Amman 19392, Jordan.Jordan Standards and Metrology Organization, Amman 11194, Jordan.Faculty of Engineering, Department of Civil Engineering, The University of Jordan, Amman 11942, Jordan.The low cost of basalt and steel fibers makes their use in enhancing concrete properties very attractive, this paper presents experimental research on the use of Basalt Fibers (BF) and Steel Fibers (SF) and their effect on compressive, tensile, and flexural behavior of reinforced concrete beams under normal and elevated temperatures. Nineteen beams, 114 cubes, and 114 cylinders were tested to find the optimum percentage of fibers. The percentages of BF used were 1%, 2%, and 3.5% by cement weight, while the percentages of SF were 0%, 0.5%, 1%, and 1.5%. Heated samples were subjected to 600 ℃ for 3 hours and left to cool off naturally before testing. The test results show that using BF and SF significantly increased the tensile strength of unheated cylinders, with the optimum fiber content of 1% BF - 1.5% SF achieving an increase of 163% over the control. For heated cylinders, the optimum fiber content was (2% BF - 1.5% SF) achieving an increase of 175%. For compressive strength, enhancement was more modest for most of the fiber content ratios used, and the optimum mix of (1% BF - 1% SF) achieved an enhancement for unheated and heated conditions of 27% and 44%, respectively. Flexural results show that beams employing a mix of 2% BF and 1% SF yielded the most favorable result at normal temperature, enhancing the capacity by 27% compared to the control. While at high temperatures, using an optimum mix of 1% BF and 1.5% SF achieved a 27.2% increase compared to control. The use of BF and SF in concrete has also been proven to increase the ductility of the beams and has moved the failure mode from shear to flexural failure.flexural behaviorreinforced concrete (rc) beamssteel fibers (sf)basalt fibers (bf)fiber reinforced concrete (frc)elevated temperatures |
| spellingShingle | Ahmed Ashteyat Ala Obaidat Tarik Kharabsheh Ahmed Harahsheh Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperature Sustainable Structures flexural behavior reinforced concrete (rc) beams steel fibers (sf) basalt fibers (bf) fiber reinforced concrete (frc) elevated temperatures |
| title | Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperature |
| title_full | Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperature |
| title_fullStr | Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperature |
| title_full_unstemmed | Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperature |
| title_short | Flexural behavior of high-strength reinforced concrete beam with hybrid fiber under normal and high temperature |
| title_sort | flexural behavior of high strength reinforced concrete beam with hybrid fiber under normal and high temperature |
| topic | flexural behavior reinforced concrete (rc) beams steel fibers (sf) basalt fibers (bf) fiber reinforced concrete (frc) elevated temperatures |
| work_keys_str_mv | AT ahmedashteyat flexuralbehaviorofhighstrengthreinforcedconcretebeamwithhybridfiberundernormalandhightemperature AT alaobaidat flexuralbehaviorofhighstrengthreinforcedconcretebeamwithhybridfiberundernormalandhightemperature AT tarikkharabsheh flexuralbehaviorofhighstrengthreinforcedconcretebeamwithhybridfiberundernormalandhightemperature AT ahmedharahsheh flexuralbehaviorofhighstrengthreinforcedconcretebeamwithhybridfiberundernormalandhightemperature |