Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigation
This study conducted both experimental and numerical investigations on the capillary water absorption into AAS materials with varying mix proportions. The results demonstrate that the capillary water absorption of AAS mortars adheres to the square root of time (SRT) law until wetting front reaches t...
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Elsevier
2025-03-01
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| Series: | Developments in the Built Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666165924002783 |
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| author | Fangzhou Ren Jian Zhang Jianxiang Yang Xiangsheng Chen |
| author_facet | Fangzhou Ren Jian Zhang Jianxiang Yang Xiangsheng Chen |
| author_sort | Fangzhou Ren |
| collection | DOAJ |
| description | This study conducted both experimental and numerical investigations on the capillary water absorption into AAS materials with varying mix proportions. The results demonstrate that the capillary water absorption of AAS mortars adheres to the square root of time (SRT) law until wetting front reaches the top surface of specimen. The isopropanol (IPA) absorption of AAS mortars also follows the SRT law, and the measured intrinsic capillary sorptivity Sint for IPA and water are quite close. Through theoretical modeling and numerical simulation, the capillary absorption kinetics of different AAS mortars can all be accurately quantified using the Richards equation, regardless of the water retention curve model employed. These results suggest that the microstructure of AAS materials studied herein is stable during capillary water absorption. This may be attributed to the viscous characteristics of AAS materials, arising from the irreversible collapse and rearrangement of the nanostructure of C-A-S-H gels during drying. |
| format | Article |
| id | doaj-art-0da2c80eb8ca42d0a3c823a583686e22 |
| institution | DOAJ |
| issn | 2666-1659 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Developments in the Built Environment |
| spelling | doaj-art-0da2c80eb8ca42d0a3c823a583686e222025-08-20T02:51:39ZengElsevierDevelopments in the Built Environment2666-16592025-03-012110059710.1016/j.dibe.2024.100597Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigationFangzhou Ren0Jian Zhang1Jianxiang Yang2Xiangsheng Chen3State Key Laboratory of Intelligent Geotechnics and Tunnelling, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Coastal Urban Resilient Infrastructures (Shenzhen University), Ministry of Education, Shenzhen 518060, China; College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; National Engineering Research Center of Deep Shaft Construction, Shenzhen 518060, ChinaCorrespondence to: College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China.; State Key Laboratory of Intelligent Geotechnics and Tunnelling, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Coastal Urban Resilient Infrastructures (Shenzhen University), Ministry of Education, Shenzhen 518060, China; College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; National Engineering Research Center of Deep Shaft Construction, Shenzhen 518060, ChinaState Key Laboratory of Intelligent Geotechnics and Tunnelling, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Coastal Urban Resilient Infrastructures (Shenzhen University), Ministry of Education, Shenzhen 518060, China; College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; National Engineering Research Center of Deep Shaft Construction, Shenzhen 518060, ChinaState Key Laboratory of Intelligent Geotechnics and Tunnelling, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Coastal Urban Resilient Infrastructures (Shenzhen University), Ministry of Education, Shenzhen 518060, China; College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; National Engineering Research Center of Deep Shaft Construction, Shenzhen 518060, ChinaThis study conducted both experimental and numerical investigations on the capillary water absorption into AAS materials with varying mix proportions. The results demonstrate that the capillary water absorption of AAS mortars adheres to the square root of time (SRT) law until wetting front reaches the top surface of specimen. The isopropanol (IPA) absorption of AAS mortars also follows the SRT law, and the measured intrinsic capillary sorptivity Sint for IPA and water are quite close. Through theoretical modeling and numerical simulation, the capillary absorption kinetics of different AAS mortars can all be accurately quantified using the Richards equation, regardless of the water retention curve model employed. These results suggest that the microstructure of AAS materials studied herein is stable during capillary water absorption. This may be attributed to the viscous characteristics of AAS materials, arising from the irreversible collapse and rearrangement of the nanostructure of C-A-S-H gels during drying.http://www.sciencedirect.com/science/article/pii/S2666165924002783Alkali-activated slagCapillary absorptionSorptivityNumerical simulation |
| spellingShingle | Fangzhou Ren Jian Zhang Jianxiang Yang Xiangsheng Chen Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigation Developments in the Built Environment Alkali-activated slag Capillary absorption Sorptivity Numerical simulation |
| title | Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigation |
| title_full | Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigation |
| title_fullStr | Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigation |
| title_full_unstemmed | Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigation |
| title_short | Capillary water absorption into alkali-activated slag materials: Experimental and numerical investigation |
| title_sort | capillary water absorption into alkali activated slag materials experimental and numerical investigation |
| topic | Alkali-activated slag Capillary absorption Sorptivity Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2666165924002783 |
| work_keys_str_mv | AT fangzhouren capillarywaterabsorptionintoalkaliactivatedslagmaterialsexperimentalandnumericalinvestigation AT jianzhang capillarywaterabsorptionintoalkaliactivatedslagmaterialsexperimentalandnumericalinvestigation AT jianxiangyang capillarywaterabsorptionintoalkaliactivatedslagmaterialsexperimentalandnumericalinvestigation AT xiangshengchen capillarywaterabsorptionintoalkaliactivatedslagmaterialsexperimentalandnumericalinvestigation |