Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits
The purpose of this qualification work is to study the physical and mechanical behavior of concrete with the addition of 0.5% and 1% coconut fiber, which has been subjected to two chemical treatments to reduce its degradation. The coconut fibers were extracted from the raw material and cut into piec...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Fibers |
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| Online Access: | https://www.mdpi.com/2079-6439/10/11/96 |
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| author | Emilio Vélez Ricardo Rodríguez Nicolay Bernardo Yanchapanta Gómez Edgar David Mora Luis Hernández Jorge Albuja-Sánchez María Inés Calvo |
| author_facet | Emilio Vélez Ricardo Rodríguez Nicolay Bernardo Yanchapanta Gómez Edgar David Mora Luis Hernández Jorge Albuja-Sánchez María Inés Calvo |
| author_sort | Emilio Vélez |
| collection | DOAJ |
| description | The purpose of this qualification work is to study the physical and mechanical behavior of concrete with the addition of 0.5% and 1% coconut fiber, which has been subjected to two chemical treatments to reduce its degradation. The coconut fibers were extracted from the raw material and cut into pieces 4 cm long. Subsequently, the fibers were subjected to two chemical treatments. The first involved immersing the fibers in 4% sodium hydroxide (NaOH) solution, and the second treatment involved coating them with gum arabic and silica fume. A total of 50 samples of fibers were collected in their natural and post-treated state to be tested. The dosage was prepared for design strengths of 210 and 240 kg/cm<sup>2</sup> (20.59 and 23.54 MPa), so that the percentages of 0.5% and 1% volume of coconut fiber, for the two treatments selected, replaced the respective volume of coarse aggregates. The cylinders with 1% addition of fibers had the best performance for the design strength of 20.59 MPa, including the cylinders without fibers. Those with 0.5% addition of fibers presented better performance for the 23.54 MPa dosage, although this was lower than the cylinders without fibers. In all cases, the cylinders with NaOH-treated fibers outperformed their counterparts with fibers treated with gum arabic and silica fume. Finally, a CO<sub>2</sub> balance was determined, and an environmental gain up to 14 kg in CO<sub>2</sub> emissions was established for each cubic meter of composite concrete. |
| first_indexed | 2024-03-09T19:05:42Z |
| format | Article |
| id | doaj.art-a0ea67fe2865495583777ac7d6874bac |
| institution | Directory Open Access Journal |
| issn | 2079-6439 |
| language | English |
| last_indexed | 2024-03-09T19:05:42Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fibers |
| spelling | doaj.art-a0ea67fe2865495583777ac7d6874bac2023-11-24T04:38:33ZengMDPI AGFibers2079-64392022-11-0110119610.3390/fib10110096Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental BenefitsEmilio Vélez0Ricardo Rodríguez1Nicolay Bernardo Yanchapanta Gómez2Edgar David Mora3Luis Hernández4Jorge Albuja-Sánchez5María Inés Calvo6Departamento de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional (EPN), Quito 170143, EcuadorDepartamento de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional (EPN), Quito 170143, EcuadorDepartamento de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional (EPN), Quito 170143, EcuadorDepartamento de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional (EPN), Quito 170143, EcuadorDepartamento de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional (EPN), Quito 170143, EcuadorDepartment of Civil Engineering, Laboratory of Materials Resistance, Soil Mechanics, Pavements and Geotechnics, Pontificia Universidad Católica del Ecuador (PUCE), Quito 170143, EcuadorDepartment of Civil Engineering, Laboratory of Materials Resistance, Soil Mechanics, Pavements and Geotechnics, Pontificia Universidad Católica del Ecuador (PUCE), Quito 170143, EcuadorThe purpose of this qualification work is to study the physical and mechanical behavior of concrete with the addition of 0.5% and 1% coconut fiber, which has been subjected to two chemical treatments to reduce its degradation. The coconut fibers were extracted from the raw material and cut into pieces 4 cm long. Subsequently, the fibers were subjected to two chemical treatments. The first involved immersing the fibers in 4% sodium hydroxide (NaOH) solution, and the second treatment involved coating them with gum arabic and silica fume. A total of 50 samples of fibers were collected in their natural and post-treated state to be tested. The dosage was prepared for design strengths of 210 and 240 kg/cm<sup>2</sup> (20.59 and 23.54 MPa), so that the percentages of 0.5% and 1% volume of coconut fiber, for the two treatments selected, replaced the respective volume of coarse aggregates. The cylinders with 1% addition of fibers had the best performance for the design strength of 20.59 MPa, including the cylinders without fibers. Those with 0.5% addition of fibers presented better performance for the 23.54 MPa dosage, although this was lower than the cylinders without fibers. In all cases, the cylinders with NaOH-treated fibers outperformed their counterparts with fibers treated with gum arabic and silica fume. Finally, a CO<sub>2</sub> balance was determined, and an environmental gain up to 14 kg in CO<sub>2</sub> emissions was established for each cubic meter of composite concrete.https://www.mdpi.com/2079-6439/10/11/96coconut fibersilica fumemercerizationcompression strengthelasticity modulusCO<sub>2</sub> emissions |
| spellingShingle | Emilio Vélez Ricardo Rodríguez Nicolay Bernardo Yanchapanta Gómez Edgar David Mora Luis Hernández Jorge Albuja-Sánchez María Inés Calvo Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits Fibers coconut fiber silica fume mercerization compression strength elasticity modulus CO<sub>2</sub> emissions |
| title | Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits |
| title_full | Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits |
| title_fullStr | Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits |
| title_full_unstemmed | Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits |
| title_short | Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits |
| title_sort | coconut fiber composite concrete assessment of mechanical performance and environmental benefits |
| topic | coconut fiber silica fume mercerization compression strength elasticity modulus CO<sub>2</sub> emissions |
| url | https://www.mdpi.com/2079-6439/10/11/96 |
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