The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag Pastes
The effect of in-house synthesized hydrogels with different chemical compositions on the properties of alkali-activated slag pastes was examined. It was found that the teabag test and modified teabag test as a direct method and the flow test as an indirect method showed a similar trend in hydrogel a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/8/11/731 |
| _version_ | 1797468191193038848 |
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| author | Joshua Prabahar Babak Vafaei Ali Ghahremaninezhad |
| author_facet | Joshua Prabahar Babak Vafaei Ali Ghahremaninezhad |
| author_sort | Joshua Prabahar |
| collection | DOAJ |
| description | The effect of in-house synthesized hydrogels with different chemical compositions on the properties of alkali-activated slag pastes was examined. It was found that the teabag test and modified teabag test as a direct method and the flow test as an indirect method showed a similar trend in hydrogel absorption; however, the absorption values differ noticeably between the direct and indirect methods. The alkali-activated slag pastes with hydrogels demonstrated a significant reduction in autogenous shrinkage compared to the pastes without hydrogels. The creation of macrovoids by the hydrogels and change in pore structure resulted in a decrease in compressive strength and electrical resistivity of the pastes with hydrogels. The absorption and desorption of hydrogels in the pastes were tracked using X-ray microcomputed tomography (micro-CT), and it was shown that the onset of hydrogel desorption approximately coincided with the final setting time of the pastes. |
| first_indexed | 2024-03-09T19:04:03Z |
| format | Article |
| id | doaj.art-f8fe2515e64c46d4a1e1cbc609e73ec9 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-09T19:04:03Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-f8fe2515e64c46d4a1e1cbc609e73ec92023-11-24T04:46:53ZengMDPI AGGels2310-28612022-11-0181173110.3390/gels8110731The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag PastesJoshua Prabahar0Babak Vafaei1Ali Ghahremaninezhad2Department of Civil and Architectural Engineering, University of Miami, Coral Gables, FL 33146, USADepartment of Civil and Architectural Engineering, University of Miami, Coral Gables, FL 33146, USADepartment of Civil and Architectural Engineering, University of Miami, Coral Gables, FL 33146, USAThe effect of in-house synthesized hydrogels with different chemical compositions on the properties of alkali-activated slag pastes was examined. It was found that the teabag test and modified teabag test as a direct method and the flow test as an indirect method showed a similar trend in hydrogel absorption; however, the absorption values differ noticeably between the direct and indirect methods. The alkali-activated slag pastes with hydrogels demonstrated a significant reduction in autogenous shrinkage compared to the pastes without hydrogels. The creation of macrovoids by the hydrogels and change in pore structure resulted in a decrease in compressive strength and electrical resistivity of the pastes with hydrogels. The absorption and desorption of hydrogels in the pastes were tracked using X-ray microcomputed tomography (micro-CT), and it was shown that the onset of hydrogel desorption approximately coincided with the final setting time of the pastes.https://www.mdpi.com/2310-2861/8/11/731AAShydrogelsabsorption |
| spellingShingle | Joshua Prabahar Babak Vafaei Ali Ghahremaninezhad The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag Pastes Gels AAS hydrogels absorption |
| title | The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag Pastes |
| title_full | The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag Pastes |
| title_fullStr | The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag Pastes |
| title_full_unstemmed | The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag Pastes |
| title_short | The Effect of Hydrogels with Different Chemical Compositions on the Behavior of Alkali-Activated Slag Pastes |
| title_sort | effect of hydrogels with different chemical compositions on the behavior of alkali activated slag pastes |
| topic | AAS hydrogels absorption |
| url | https://www.mdpi.com/2310-2861/8/11/731 |
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