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Evaluation of Autogenous Healing in Flexural Mortar Members by Chloride Ion Penetration Resistance

Authors
Park, ByoungsunChoi, Youngcheol
Issue Date
6월-2021
Publisher
MDPI
Keywords
autogenous healing; flexural member; chloride ion penetration test; mineral admixture; water flow test
Citation
NANOMATERIALS, v.11, no.6
Indexed
SCIE
SCOPUS
Journal Title
NANOMATERIALS
Volume
11
Number
6
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/127960
DOI
10.3390/nano11061622
ISSN
2079-4991
Abstract
In this study, we investigated the effects of mineral admixtures on the autogenous healing of flexural mortar members through a chloride ion penetration test. The mineral admixtures used were ground granulated blast-furnace slag (GGBS), fly ash, silica fume (SF), clinker binder, and clinker sand. Through a four-point bending test, a crack of approximately 100 mu m was induced at the bottom of the flexural mortar member, and the chloride ion penetration depth through the crack was measured to evaluate the self-healing performance. Additionally, we analyzed the correlation between the self-healing performances, which was measured through water flow and water absorption tests. The experimental results showed that the chloride ion penetration depth decreased due to crack healing, and the self-healing performance of the GGBS and SF was the highest. It was found that the subtle change in the self-healing performance was more accurately evaluated by the chloride ion penetration test.
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