Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer Composites
The current geopolymers have limited mechanical strength against the effect of tension, which makes them susceptible to brittle failure. However, owing to their potential as a sustainable construction material, there is growing interest in improving the poor mechanical properties of geopolymers. Thi...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/6/1248 |
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| author | Susana P. Arredondo Ramón Corral A. Valenciano Carlos A. Rosas Jose M. Gómez Teresita J. Medina Magnolia Soto Jesús M. Bernal |
| author_facet | Susana P. Arredondo Ramón Corral A. Valenciano Carlos A. Rosas Jose M. Gómez Teresita J. Medina Magnolia Soto Jesús M. Bernal |
| author_sort | Susana P. Arredondo |
| collection | DOAJ |
| description | The current geopolymers have limited mechanical strength against the effect of tension, which makes them susceptible to brittle failure. However, owing to their potential as a sustainable construction material, there is growing interest in improving the poor mechanical properties of geopolymers. This study experimentally investigated crucial properties of polypropylene-fiber-reinforced fly ash-based geopolymer composites. The effects of polypropylene fibers (PPF) addition (0.5%, 1.0% and 1.5% by volume) on the mechanical properties of the geopolymer composites were investigated with respect to compressive and flexural strength, deformation behavior of Young’s and shear moduli, and resilience capacity. In addition, scanning electron microscopy was performed to establish the morphology of the geopolymeric matrix and the fiber–matrix interfacial interaction. The addition of PPF significantly increased the flexural strength: compared with the control, at 7 days it was 27% greater for the 0.5% PPF composite and 65% greater for the 1.0% PPF composite. By 14 days it was 31% and 61% greater, respectively. By contrast, the 1.5% PPF composite had lower strength parameters compared with the control because the fiber dispersion increased the porosity. Similar trends were seen for resilience. The SEM observations showed the dispersion of the fibers and helped elucidate the fiber–matrix interaction mechanism. |
| first_indexed | 2024-03-09T12:52:01Z |
| format | Article |
| id | doaj.art-7835e2941f15446eaf8a81c0f9a464a1 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T12:52:01Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-7835e2941f15446eaf8a81c0f9a464a12023-11-30T22:04:41ZengMDPI AGPolymers2073-43602022-03-01146124810.3390/polym14061248Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer CompositesSusana P. Arredondo0Ramón Corral1A. Valenciano2Carlos A. Rosas3Jose M. Gómez4Teresita J. Medina5Magnolia Soto6Jesús M. Bernal7Faculty of Engineering, Autonomous University of Sinaloa, Los Mochis 81223, MexicoFaculty of Engineering, Autonomous University of Sinaloa, Los Mochis 81223, MexicoFaculty of Engineering, Autonomous University of Sinaloa, Los Mochis 81223, MexicoFaculty of Engineering, Autonomous University of Sinaloa, Los Mochis 81223, MexicoBarcelona School of Building Construction, Polytechnic University of Catalonia, 08028 Barcelona, SpainFaculty of Engineering, Autonomous University of Sinaloa, Los Mochis 81223, MexicoFaculty of Engineering, Autonomous University of Sinaloa, Los Mochis 81223, MexicoSchool of Engineering, Autonomous University of Sinaloa, Mazatlán 82017, MexicoThe current geopolymers have limited mechanical strength against the effect of tension, which makes them susceptible to brittle failure. However, owing to their potential as a sustainable construction material, there is growing interest in improving the poor mechanical properties of geopolymers. This study experimentally investigated crucial properties of polypropylene-fiber-reinforced fly ash-based geopolymer composites. The effects of polypropylene fibers (PPF) addition (0.5%, 1.0% and 1.5% by volume) on the mechanical properties of the geopolymer composites were investigated with respect to compressive and flexural strength, deformation behavior of Young’s and shear moduli, and resilience capacity. In addition, scanning electron microscopy was performed to establish the morphology of the geopolymeric matrix and the fiber–matrix interfacial interaction. The addition of PPF significantly increased the flexural strength: compared with the control, at 7 days it was 27% greater for the 0.5% PPF composite and 65% greater for the 1.0% PPF composite. By 14 days it was 31% and 61% greater, respectively. By contrast, the 1.5% PPF composite had lower strength parameters compared with the control because the fiber dispersion increased the porosity. Similar trends were seen for resilience. The SEM observations showed the dispersion of the fibers and helped elucidate the fiber–matrix interaction mechanism.https://www.mdpi.com/2073-4360/14/6/1248geopolymerfibersresilienceelastic modulusstress–strainSEM |
| spellingShingle | Susana P. Arredondo Ramón Corral A. Valenciano Carlos A. Rosas Jose M. Gómez Teresita J. Medina Magnolia Soto Jesús M. Bernal Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer Composites Polymers geopolymer fibers resilience elastic modulus stress–strain SEM |
| title | Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer Composites |
| title_full | Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer Composites |
| title_fullStr | Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer Composites |
| title_full_unstemmed | Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer Composites |
| title_short | Strength, Elastic Properties and Fiber–Matrix Interaction Mechanism in Geopolymer Composites |
| title_sort | strength elastic properties and fiber matrix interaction mechanism in geopolymer composites |
| topic | geopolymer fibers resilience elastic modulus stress–strain SEM |
| url | https://www.mdpi.com/2073-4360/14/6/1248 |
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