Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength
This paper explores hybrid alkaline cement composites with high cement content over 50%. Calcium (Ca) accelerates the strength development and improves the compressive strength of geopolymer. However, the mixing proportion of Ca in geopolymer has been limited because Ca significantly decreases the f...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422001053 |
| _version_ | 1818317792150028288 |
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| author | Sungwoo Park Kebede Alemayehu Moges Siyu Wu Sukhoon Pyo |
| author_facet | Sungwoo Park Kebede Alemayehu Moges Siyu Wu Sukhoon Pyo |
| author_sort | Sungwoo Park |
| collection | DOAJ |
| description | This paper explores hybrid alkaline cement composites with high cement content over 50%. Calcium (Ca) accelerates the strength development and improves the compressive strength of geopolymer. However, the mixing proportion of Ca in geopolymer has been limited because Ca significantly decreases the flow of fresh geopolymer. This study resolves the flow decline issue by mixing a part of the initial mixing water with cement before adding it into a metakaolin-based geopolymer, which is named hybrid alkaline cement composites (HACC) in this study. The cement/(metakaolin + cement) ratio investigated is up to 85%. Based on the initial setting time and compressive strength results, some unique characteristics of the HACC are observed: i) the material is set within 10 min and the 28-day compressive strength is over 80 MPa with 1:1 mixing ratio of geopolymer and cement paste, and ii) the compressive strength of HACC is not always higher with a lower w/c ratio of cement paste. |
| first_indexed | 2024-12-13T09:42:57Z |
| format | Article |
| id | doaj.art-9190608fb35e47c18e3cbbddee0c5b01 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-13T09:42:57Z |
| publishDate | 2022-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-9190608fb35e47c18e3cbbddee0c5b012022-12-21T23:52:08ZengElsevierJournal of Materials Research and Technology2238-78542022-03-011715821597Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strengthSungwoo Park0Kebede Alemayehu Moges1Siyu Wu2Sukhoon Pyo3Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, Republic of KoreaDepartment of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, Republic of KoreaDepartment of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, Republic of KoreaCorresponding author.; Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, Republic of KoreaThis paper explores hybrid alkaline cement composites with high cement content over 50%. Calcium (Ca) accelerates the strength development and improves the compressive strength of geopolymer. However, the mixing proportion of Ca in geopolymer has been limited because Ca significantly decreases the flow of fresh geopolymer. This study resolves the flow decline issue by mixing a part of the initial mixing water with cement before adding it into a metakaolin-based geopolymer, which is named hybrid alkaline cement composites (HACC) in this study. The cement/(metakaolin + cement) ratio investigated is up to 85%. Based on the initial setting time and compressive strength results, some unique characteristics of the HACC are observed: i) the material is set within 10 min and the 28-day compressive strength is over 80 MPa with 1:1 mixing ratio of geopolymer and cement paste, and ii) the compressive strength of HACC is not always higher with a lower w/c ratio of cement paste.http://www.sciencedirect.com/science/article/pii/S2238785422001053Hybrid alkaline cementGeopolymerMetakaolinCompressive strengthSetting timeTGA |
| spellingShingle | Sungwoo Park Kebede Alemayehu Moges Siyu Wu Sukhoon Pyo Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength Journal of Materials Research and Technology Hybrid alkaline cement Geopolymer Metakaolin Compressive strength Setting time TGA |
| title | Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength |
| title_full | Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength |
| title_fullStr | Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength |
| title_full_unstemmed | Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength |
| title_short | Characteristics of hybrid alkaline cement composites with high cement content: flash set and high compressive strength |
| title_sort | characteristics of hybrid alkaline cement composites with high cement content flash set and high compressive strength |
| topic | Hybrid alkaline cement Geopolymer Metakaolin Compressive strength Setting time TGA |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422001053 |
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