Novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material
Abstract Geopolymer (GP) was invented to replace concrete, but its heat curing requirement hinders extensive use in real-world construction. Past studies have tested several methods of heat curing. However, the conventional heat curing process (using an oven) is still required for GP to develop good...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-06-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-13392-x |
| _version_ | 1818469550482522112 |
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| author | Toon Nongnuang Peerapong Jitsangiam Ubolluk Rattanasak Prinya Chindaprasirt |
| author_facet | Toon Nongnuang Peerapong Jitsangiam Ubolluk Rattanasak Prinya Chindaprasirt |
| author_sort | Toon Nongnuang |
| collection | DOAJ |
| description | Abstract Geopolymer (GP) was invented to replace concrete, but its heat curing requirement hinders extensive use in real-world construction. Past studies have tested several methods of heat curing. However, the conventional heat curing process (using an oven) is still required for GP to develop good strength on the laboratory scale. This study introduces a new heat curing method for GP based on an electromagnetic field (EMF)generator and a ferromagnetic material. Waste iron powder (WIP) was used as the ferromagnetic material mixed with the fly ash-based GP to generate heat through induction. The sample was cured at 1.18 kW with 150–200 kHz of EMF generator for 15 min. The results showed that 5% of the WIP mixed sample gained compressive and flexural strength at 28 days more than the control (oven-cured). Compressive and flexural strengths of 76.8 MPa and 11.3 MPa were obtained, respectively. In addition, heat induction enhanced the densification and geopolymerization in the GP matrix following SEM and XRD results. This alternative method of heat curing accelerated the formation of the GP matrix, reduced curing time, and increased strength. Moreover, this EMF curing method can save 99.70% of the energy consumed compared to the conventional heat curing method. |
| first_indexed | 2024-04-13T21:25:54Z |
| format | Article |
| id | doaj.art-5ddca1c36efe4eaf86a8ee8ee890b9e8 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T21:25:54Z |
| publishDate | 2022-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-5ddca1c36efe4eaf86a8ee8ee890b9e82022-12-22T02:29:20ZengNature PortfolioScientific Reports2045-23222022-06-0112111110.1038/s41598-022-13392-xNovel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive materialToon Nongnuang0Peerapong Jitsangiam1Ubolluk Rattanasak2Prinya Chindaprasirt3Department of Civil Engineering, Faculty of Engineering, Chiang Mai UniversityCenter of Excellence in Natural Disaster Management, Department of Civil Engineering, Faculty of Engineering, Chiang Mai UniversityDepartment of Chemistry, Faculty of Science, Burapha UniversitySustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen UniversityAbstract Geopolymer (GP) was invented to replace concrete, but its heat curing requirement hinders extensive use in real-world construction. Past studies have tested several methods of heat curing. However, the conventional heat curing process (using an oven) is still required for GP to develop good strength on the laboratory scale. This study introduces a new heat curing method for GP based on an electromagnetic field (EMF)generator and a ferromagnetic material. Waste iron powder (WIP) was used as the ferromagnetic material mixed with the fly ash-based GP to generate heat through induction. The sample was cured at 1.18 kW with 150–200 kHz of EMF generator for 15 min. The results showed that 5% of the WIP mixed sample gained compressive and flexural strength at 28 days more than the control (oven-cured). Compressive and flexural strengths of 76.8 MPa and 11.3 MPa were obtained, respectively. In addition, heat induction enhanced the densification and geopolymerization in the GP matrix following SEM and XRD results. This alternative method of heat curing accelerated the formation of the GP matrix, reduced curing time, and increased strength. Moreover, this EMF curing method can save 99.70% of the energy consumed compared to the conventional heat curing method.https://doi.org/10.1038/s41598-022-13392-x |
| spellingShingle | Toon Nongnuang Peerapong Jitsangiam Ubolluk Rattanasak Prinya Chindaprasirt Novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material Scientific Reports |
| title | Novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material |
| title_full | Novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material |
| title_fullStr | Novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material |
| title_full_unstemmed | Novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material |
| title_short | Novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material |
| title_sort | novel electromagnetic induction heat curing process of fly ash geopolymer using waste iron powder as a conductive material |
| url | https://doi.org/10.1038/s41598-022-13392-x |
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