Suitability of Surface-Treated Flax and Hemp Fibers for Concrete Reinforcement
The use of vegetable fibres as a sustainable alternative to non-natural sources of fibres applied for concrete reinforcement has been studied for over three decades. The main issues about plant-based fibres pointed out by other authors are the variability in their properties and concerns about poten...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-11-01
|
| Series: | Fibers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-6439/10/11/101 |
| _version_ | 1797465278241570816 |
|---|---|
| author | Ana Caroline da Costa Santos Paul Archbold |
| author_facet | Ana Caroline da Costa Santos Paul Archbold |
| author_sort | Ana Caroline da Costa Santos |
| collection | DOAJ |
| description | The use of vegetable fibres as a sustainable alternative to non-natural sources of fibres applied for concrete reinforcement has been studied for over three decades. The main issues about plant-based fibres pointed out by other authors are the variability in their properties and concerns about potential high biodegradability in the alkaline pH of the concrete matrix. Aiming to minimise the variability of flax and hemp fibres, this research compares a range of chemical surface treatments, analysing their effects on the behaviour of the fibres and the effects of their addition to concrete. Corroborating what has been found by other authors, the treatment using NaOH 10% for 24 h was able to enhance the properties of hemp fibre-reinforced concrete and reduce the degradability in alkaline solution. For flax fibres, a novel alternative stood out: treatment using 1% of stearic acid in ethanol for 4 h. Treatment using this solution increased the tensile by 101%, causing a minor effect on the elastic modulus. Concrete mixes reinforced with the treated flax fibres presented reduced thermal conductivity and elastic modulus and increased residual tensile strength and fracture energy. |
| first_indexed | 2024-03-09T18:20:14Z |
| format | Article |
| id | doaj.art-12172fca6ded4bd6b05f8bf9798e7991 |
| institution | Directory Open Access Journal |
| issn | 2079-6439 |
| language | English |
| last_indexed | 2024-03-09T18:20:14Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fibers |
| spelling | doaj.art-12172fca6ded4bd6b05f8bf9798e79912023-11-24T08:20:13ZengMDPI AGFibers2079-64392022-11-01101110110.3390/fib10110101Suitability of Surface-Treated Flax and Hemp Fibers for Concrete ReinforcementAna Caroline da Costa Santos0Paul Archbold1Faculty of Engineering & Informatics, Technological University of the Shannon: Midlands Midwest, University Road, N37 HD68 Athlone, IrelandFaculty of Engineering & Informatics, Technological University of the Shannon: Midlands Midwest, University Road, N37 HD68 Athlone, IrelandThe use of vegetable fibres as a sustainable alternative to non-natural sources of fibres applied for concrete reinforcement has been studied for over three decades. The main issues about plant-based fibres pointed out by other authors are the variability in their properties and concerns about potential high biodegradability in the alkaline pH of the concrete matrix. Aiming to minimise the variability of flax and hemp fibres, this research compares a range of chemical surface treatments, analysing their effects on the behaviour of the fibres and the effects of their addition to concrete. Corroborating what has been found by other authors, the treatment using NaOH 10% for 24 h was able to enhance the properties of hemp fibre-reinforced concrete and reduce the degradability in alkaline solution. For flax fibres, a novel alternative stood out: treatment using 1% of stearic acid in ethanol for 4 h. Treatment using this solution increased the tensile by 101%, causing a minor effect on the elastic modulus. Concrete mixes reinforced with the treated flax fibres presented reduced thermal conductivity and elastic modulus and increased residual tensile strength and fracture energy.https://www.mdpi.com/2079-6439/10/11/101production of vegetable fibre reinforced concrete (FRC)extraction of flax and hemp fibressurface treatment of vegetable fibresdegradability of plant fibres into the alkaline matrixmechanical properties of FRCfracture energy of natural fibre reinforced concrete |
| spellingShingle | Ana Caroline da Costa Santos Paul Archbold Suitability of Surface-Treated Flax and Hemp Fibers for Concrete Reinforcement Fibers production of vegetable fibre reinforced concrete (FRC) extraction of flax and hemp fibres surface treatment of vegetable fibres degradability of plant fibres into the alkaline matrix mechanical properties of FRC fracture energy of natural fibre reinforced concrete |
| title | Suitability of Surface-Treated Flax and Hemp Fibers for Concrete Reinforcement |
| title_full | Suitability of Surface-Treated Flax and Hemp Fibers for Concrete Reinforcement |
| title_fullStr | Suitability of Surface-Treated Flax and Hemp Fibers for Concrete Reinforcement |
| title_full_unstemmed | Suitability of Surface-Treated Flax and Hemp Fibers for Concrete Reinforcement |
| title_short | Suitability of Surface-Treated Flax and Hemp Fibers for Concrete Reinforcement |
| title_sort | suitability of surface treated flax and hemp fibers for concrete reinforcement |
| topic | production of vegetable fibre reinforced concrete (FRC) extraction of flax and hemp fibres surface treatment of vegetable fibres degradability of plant fibres into the alkaline matrix mechanical properties of FRC fracture energy of natural fibre reinforced concrete |
| url | https://www.mdpi.com/2079-6439/10/11/101 |
| work_keys_str_mv | AT anacarolinedacostasantos suitabilityofsurfacetreatedflaxandhempfibersforconcretereinforcement AT paularchbold suitabilityofsurfacetreatedflaxandhempfibersforconcretereinforcement |