Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers
The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/3/690 |
| _version_ | 1811308739710418944 |
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| author | Geuntae Hong Chiwon Song Seongcheol Choi |
| author_facet | Geuntae Hong Chiwon Song Seongcheol Choi |
| author_sort | Geuntae Hong |
| collection | DOAJ |
| description | The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 µm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1−100% and 79.7−90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO<sub>3</sub> and/or calcium silicate hydrate (CSH) as the main healing products. |
| first_indexed | 2024-04-13T09:29:51Z |
| format | Article |
| id | doaj.art-344eabafa78b40cdbbb53ab4cee14065 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-13T09:29:51Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-344eabafa78b40cdbbb53ab4cee140652022-12-22T02:52:18ZengMDPI AGMaterials1996-19442020-02-0113369010.3390/ma13030690ma13030690Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent PolymersGeuntae Hong0Chiwon Song1Seongcheol Choi2Department of Civil and Environmental Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaStructural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 10223, KoreaDepartment of Civil and Environmental Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaThe effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 µm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1−100% and 79.7−90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO<sub>3</sub> and/or calcium silicate hydrate (CSH) as the main healing products.https://www.mdpi.com/1996-1944/13/3/690autogenous healingcompressive strengthflow ratesuperabsorbent polymer (sap)underwaterwet/dry cycle |
| spellingShingle | Geuntae Hong Chiwon Song Seongcheol Choi Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers Materials autogenous healing compressive strength flow rate superabsorbent polymer (sap) underwater wet/dry cycle |
| title | Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers |
| title_full | Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers |
| title_fullStr | Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers |
| title_full_unstemmed | Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers |
| title_short | Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers |
| title_sort | autogenous healing of early age cracks in cementitious materials by superabsorbent polymers |
| topic | autogenous healing compressive strength flow rate superabsorbent polymer (sap) underwater wet/dry cycle |
| url | https://www.mdpi.com/1996-1944/13/3/690 |
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