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- Title
Performance of Self-healing Cementitious Mortar with PVA Fiber and SAP.
- Authors
Kwon, Sukmin; Lee, Sugyu; Kang, Hyunuk; Kim, Min Kyoung; Her, Sungwun; Bae, Sungchul; Kim, Dong Joo; Moon, Juhyuk
- Abstract
Although concrete materials generally exhibit outstanding mechanical properties, it is susceptible against crack formation. It has been reported that narrow cracks (≤ 150 µm) could be naturally sealed in the cement matrix by externally supplied water-induced hydration. However, the crack width of larger than 150 µm is difficult to be sealed without using additional self-healing admixture. In this study, the self-healing cementitious mortar was successfully developed by using a combination of polyvinyl alcohol (PVA) fiber and superabsorbent polymer (SAP), aiming to heal the wide cracks. Although the mechanical properties were slightly reduced, it shows outstanding self-healing performance by using the dual admixtures. A self-healing rate of 60% was observed in the control sample with an initial crack width of 300 µm, while a self-healing rate of nearly 100% was confirmed with suitable SAP and PVA. In addition, it was confirmed that lower hydration degree of self-healing mortar in early stage contributes to the enhanced self-healing performance of developed composite system by internally supplied water from SAP.
- Subjects
SUPERABSORBENT polymers; POLYVINYL alcohol; MORTAR; HYDRATION; FIBERS; SELF-healing materials
- Publication
International Journal of Concrete Structures & Materials, 2024, Vol 18, Issue 1, p1
- ISSN
1976-0485
- Publication type
Article
- DOI
10.1186/s40069-024-00692-x