The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement
Nanosilica produced from physically-processed white rice husk ash agricultural waste can be incorporated into geopolymer cement-based materials to improve the mechanical and micro performance. This study aimed to investigate the effect of natural nanosilica on the mechanical properties and microstru...
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MDPI AG
2021-06-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/13/2178 |
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| author | Cut Rahmawati Sri Aprilia Taufiq Saidi Teuku Budi Aulia Agung Efriyo Hadi |
| author_facet | Cut Rahmawati Sri Aprilia Taufiq Saidi Teuku Budi Aulia Agung Efriyo Hadi |
| author_sort | Cut Rahmawati |
| collection | DOAJ |
| description | Nanosilica produced from physically-processed white rice husk ash agricultural waste can be incorporated into geopolymer cement-based materials to improve the mechanical and micro performance. This study aimed to investigate the effect of natural nanosilica on the mechanical properties and microstructure of geopolymer cement. It examined the mechanical behavior of geopolymer paste reinforced with 2, 3, and 4 wt% nanosilica. The tests of compressive strength, direct tensile strength, three bending tests, Scanning Electron Microscope-Energy Dispersive X-ray (SEM/EDX), X-ray Diffraction (XRD), and Fourier-transform Infrared Spectroscopy (FTIR) were undertaken to evaluate the effect of nanosilica addition to the geopolymer paste. The addition of 2 wt% nanosilica in the geopolymer paste increased the compressive strength by 22%, flexural strength by 82%, and fracture toughness by 82% but decreased the direct tensile strength by 31%. The microstructure analysis using SEM, XRD, and FTIR showed the formation of calcium alumina-silicate hydrate (C–A–S–H) gel. The SEM images also revealed a compact and cohesive geopolymer matrix, indicating that the mechanical properties of geopolymers with 2 wt% nanosilica were improved. Thus, it is feasible for nanosilica to be used as a binder. |
| first_indexed | 2024-03-10T09:54:44Z |
| format | Article |
| id | doaj.art-63f217d5cfb04d9eb4714645b07cb0b5 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T09:54:44Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-63f217d5cfb04d9eb4714645b07cb0b52023-11-22T02:26:40ZengMDPI AGPolymers2073-43602021-06-011313217810.3390/polym13132178The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer CementCut Rahmawati0Sri Aprilia1Taufiq Saidi2Teuku Budi Aulia3Agung Efriyo Hadi4Doctoral Program, School of Engineering, Universitas Syiah Kuala, Banda Aceh 23111, IndonesiaDoctoral Program, School of Engineering, Universitas Syiah Kuala, Banda Aceh 23111, IndonesiaDoctoral Program, School of Engineering, Universitas Syiah Kuala, Banda Aceh 23111, IndonesiaDoctoral Program, School of Engineering, Universitas Syiah Kuala, Banda Aceh 23111, IndonesiaDepartment of Menchanical Engineering, Universitas Malahayati, Lampung 35153, IndonesiaNanosilica produced from physically-processed white rice husk ash agricultural waste can be incorporated into geopolymer cement-based materials to improve the mechanical and micro performance. This study aimed to investigate the effect of natural nanosilica on the mechanical properties and microstructure of geopolymer cement. It examined the mechanical behavior of geopolymer paste reinforced with 2, 3, and 4 wt% nanosilica. The tests of compressive strength, direct tensile strength, three bending tests, Scanning Electron Microscope-Energy Dispersive X-ray (SEM/EDX), X-ray Diffraction (XRD), and Fourier-transform Infrared Spectroscopy (FTIR) were undertaken to evaluate the effect of nanosilica addition to the geopolymer paste. The addition of 2 wt% nanosilica in the geopolymer paste increased the compressive strength by 22%, flexural strength by 82%, and fracture toughness by 82% but decreased the direct tensile strength by 31%. The microstructure analysis using SEM, XRD, and FTIR showed the formation of calcium alumina-silicate hydrate (C–A–S–H) gel. The SEM images also revealed a compact and cohesive geopolymer matrix, indicating that the mechanical properties of geopolymers with 2 wt% nanosilica were improved. Thus, it is feasible for nanosilica to be used as a binder.https://www.mdpi.com/2073-4360/13/13/2178geopolymerepoxyfracture toughnesstensile strengthflexural strength |
| spellingShingle | Cut Rahmawati Sri Aprilia Taufiq Saidi Teuku Budi Aulia Agung Efriyo Hadi The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement Polymers geopolymer epoxy fracture toughness tensile strength flexural strength |
| title | The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement |
| title_full | The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement |
| title_fullStr | The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement |
| title_full_unstemmed | The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement |
| title_short | The Effects of Nanosilica on Mechanical Properties and Fracture Toughness of Geopolymer Cement |
| title_sort | effects of nanosilica on mechanical properties and fracture toughness of geopolymer cement |
| topic | geopolymer epoxy fracture toughness tensile strength flexural strength |
| url | https://www.mdpi.com/2073-4360/13/13/2178 |
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