Autogenous healing of early-age cracks in cementitious materials by superabsorbent polymersopen access
- Authors
- Hong G.; Song C.; Choi S.
- Issue Date
- Feb-2020
- Publisher
- MDPI AG
- Keywords
- Autogenous healing; Compressive strength; Flow rate; Superabsorbent polymer (SAP); Underwater; Wet/dry cycle
- Citation
- Materials, v.13, no.3
- Journal Title
- Materials
- Volume
- 13
- Number
- 3
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/37901
- DOI
- 10.3390/ma13030690
- ISSN
- 1996-1944
1996-1944
- Abstract
- 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 CaCO3 and/or calcium silicate hydrate (CSH) as the main healing products. © 2020 by the authors.
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