Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High Temperature
This paper examines how steel fiber and the amount of lightweight expanded clay aggregate (LECA) affect the mechanical and microstructural properties of geopolymer concrete (GPC) made from fly ash after being heated. LECA has been used with different contents (0, 10, and 20%) as a partial replacemen...
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| Format: | Article |
| Language: | English |
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Sciendo
2024-12-01
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| Series: | Civil and Environmental Engineering |
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| Online Access: | https://doi.org/10.2478/cee-2024-0070 |
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| author | Lafta Ghassan M. Ali Ahmed S. |
| author_facet | Lafta Ghassan M. Ali Ahmed S. |
| author_sort | Lafta Ghassan M. |
| collection | DOAJ |
| description | This paper examines how steel fiber and the amount of lightweight expanded clay aggregate (LECA) affect the mechanical and microstructural properties of geopolymer concrete (GPC) made from fly ash after being heated. LECA has been used with different contents (0, 10, and 20%) as a partial replacement by weight of coarse aggregate. Steel fiber has been employed in GPC with volume fractions of 0 and 1%. A slump test was applied to examine the workability of fresh concrete. Compressive strength, splitting tensile strength, flexural strength, and elastic modulus tests also measured the mechanical properties. Furthermore, the microstructure characterization was also carried out by performing scanning electron microscopy (SEM). The findings suggest that including steel fiber and raising the LECA content in the mixture enhanced the strength’s retention following high-temperature exposure. After being exposed to a constant temperature of 800°C, GPC containing steel fiber and 20% LECA achieved the best result compared to the plain GPC in terms of decrease in mass, residual compressive and tensile strengths, residual flexural strength, and residual amount of elastic modulus: 6.04 and 4.39%; 27.08 and 39.27%; 37.6 and 47.02%; 16.07 and 30.3, and 2.17 and 6.19%, respectively. |
| format | Article |
| id | doaj-art-43af0fd25a114005a2316223c70819ea |
| institution | Kabale University |
| issn | 2199-6512 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Sciendo |
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| series | Civil and Environmental Engineering |
| spelling | doaj-art-43af0fd25a114005a2316223c70819ea2025-02-02T15:47:54ZengSciendoCivil and Environmental Engineering2199-65122024-12-0120296297710.2478/cee-2024-0070Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High TemperatureLafta Ghassan M.0Ali Ahmed S.1College of Engineering, Civil Engineering Department, Al-Nahrain University, Baghdad, IraqCollege of Engineering, Civil Engineering Department, Al-Nahrain University, Baghdad, IraqThis paper examines how steel fiber and the amount of lightweight expanded clay aggregate (LECA) affect the mechanical and microstructural properties of geopolymer concrete (GPC) made from fly ash after being heated. LECA has been used with different contents (0, 10, and 20%) as a partial replacement by weight of coarse aggregate. Steel fiber has been employed in GPC with volume fractions of 0 and 1%. A slump test was applied to examine the workability of fresh concrete. Compressive strength, splitting tensile strength, flexural strength, and elastic modulus tests also measured the mechanical properties. Furthermore, the microstructure characterization was also carried out by performing scanning electron microscopy (SEM). The findings suggest that including steel fiber and raising the LECA content in the mixture enhanced the strength’s retention following high-temperature exposure. After being exposed to a constant temperature of 800°C, GPC containing steel fiber and 20% LECA achieved the best result compared to the plain GPC in terms of decrease in mass, residual compressive and tensile strengths, residual flexural strength, and residual amount of elastic modulus: 6.04 and 4.39%; 27.08 and 39.27%; 37.6 and 47.02%; 16.07 and 30.3, and 2.17 and 6.19%, respectively.https://doi.org/10.2478/cee-2024-0070geopolymer concretesteel fiberlecahigh temperatureresidual strength. |
| spellingShingle | Lafta Ghassan M. Ali Ahmed S. Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High Temperature Civil and Environmental Engineering geopolymer concrete steel fiber leca high temperature residual strength. |
| title | Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High Temperature |
| title_full | Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High Temperature |
| title_fullStr | Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High Temperature |
| title_full_unstemmed | Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High Temperature |
| title_short | Effects of LECA Content on the Behavior of Steel Fiber-Reinforced Geopolymer Concrete at High Temperature |
| title_sort | effects of leca content on the behavior of steel fiber reinforced geopolymer concrete at high temperature |
| topic | geopolymer concrete steel fiber leca high temperature residual strength. |
| url | https://doi.org/10.2478/cee-2024-0070 |
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