A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete
Alkali-activated slag and fly ash (AASF) materials are emerging as promising alternatives to conventional Portland cement. Despite the superior mechanical properties of AASF materials, they are known to show large autogenous shrinkage, which hinders the wide application of these eco-friendly materia...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/17/6092 |
| _version_ | 1827707041405206528 |
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| author | Zhenming Li Xingliang Yao Yun Chen Tianshi Lu Guang Ye |
| author_facet | Zhenming Li Xingliang Yao Yun Chen Tianshi Lu Guang Ye |
| author_sort | Zhenming Li |
| collection | DOAJ |
| description | Alkali-activated slag and fly ash (AASF) materials are emerging as promising alternatives to conventional Portland cement. Despite the superior mechanical properties of AASF materials, they are known to show large autogenous shrinkage, which hinders the wide application of these eco-friendly materials in infrastructure. To mitigate the autogenous shrinkage of AASF, two innovative autogenous-shrinkage-mitigating admixtures, superabsorbent polymers (SAPs) and metakaolin (MK), are applied in this study. The results show that the incorporation of SAPs and MK significantly mitigates autogenous shrinkage and cracking potential of AASF paste and concrete. Moreover, the AASF concrete with SAPs and MK shows enhanced workability and tensile strength-to-compressive strength ratios. These results indicate that SAPs and MK are promising admixtures to make AASF concrete a high-performance alternative to Portland cement concrete in structural engineering. |
| first_indexed | 2024-03-10T16:38:03Z |
| format | Article |
| id | doaj.art-a54b4b6d0d12429d85f3d6961e14391b |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T16:38:03Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-a54b4b6d0d12429d85f3d6961e14391b2023-11-20T12:18:34ZengMDPI AGApplied Sciences2076-34172020-09-011017609210.3390/app10176092A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash ConcreteZhenming Li0Xingliang Yao1Yun Chen2Tianshi Lu3Guang Ye4Department of Materials, Mechanics, Management & Design, Faculty of Civil Engineering and Geoscience, Delft University of Technology, 2628 CN Delft, The NetherlandsDepartment of Materials, Mechanics, Management & Design, Faculty of Civil Engineering and Geoscience, Delft University of Technology, 2628 CN Delft, The NetherlandsDepartment of Materials, Mechanics, Management & Design, Faculty of Civil Engineering and Geoscience, Delft University of Technology, 2628 CN Delft, The NetherlandsDepartment of Materials, Mechanics, Management & Design, Faculty of Civil Engineering and Geoscience, Delft University of Technology, 2628 CN Delft, The NetherlandsDepartment of Materials, Mechanics, Management & Design, Faculty of Civil Engineering and Geoscience, Delft University of Technology, 2628 CN Delft, The NetherlandsAlkali-activated slag and fly ash (AASF) materials are emerging as promising alternatives to conventional Portland cement. Despite the superior mechanical properties of AASF materials, they are known to show large autogenous shrinkage, which hinders the wide application of these eco-friendly materials in infrastructure. To mitigate the autogenous shrinkage of AASF, two innovative autogenous-shrinkage-mitigating admixtures, superabsorbent polymers (SAPs) and metakaolin (MK), are applied in this study. The results show that the incorporation of SAPs and MK significantly mitigates autogenous shrinkage and cracking potential of AASF paste and concrete. Moreover, the AASF concrete with SAPs and MK shows enhanced workability and tensile strength-to-compressive strength ratios. These results indicate that SAPs and MK are promising admixtures to make AASF concrete a high-performance alternative to Portland cement concrete in structural engineering.https://www.mdpi.com/2076-3417/10/17/6092alkali-activated concreteshrinkagecrackinginternal curingmetakaolin |
| spellingShingle | Zhenming Li Xingliang Yao Yun Chen Tianshi Lu Guang Ye A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete Applied Sciences alkali-activated concrete shrinkage cracking internal curing metakaolin |
| title | A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete |
| title_full | A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete |
| title_fullStr | A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete |
| title_full_unstemmed | A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete |
| title_short | A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete |
| title_sort | low autogenous shrinkage alkali activated slag and fly ash concrete |
| topic | alkali-activated concrete shrinkage cracking internal curing metakaolin |
| url | https://www.mdpi.com/2076-3417/10/17/6092 |
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