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http://dx.doi.org/10.14190/JRCR.2022.10.4.600

Assessment of Recovery of Chloride Penetration Resistance of Self-healing Cement Mortars Containing Layered Double Hydroxide  

Kyung Suk, Yoo (Department of Transportation System Engineering, Graduate School of Transportation, Korea National University of Transportation)
Seung Yup, Jang (Department of Transportation System Engineering, Graduate School of Transportation, Korea National University of Transportation)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.4, 2022 , pp. 600-608 More about this Journal
Abstract
This study investigates the effect of layered double hydroxide (LDH) on the healing performance of self-healing concrete by assessing the chloride penetration resistance of self-healing cement mortars using electrical chloride ion migration-diffusion test. Test results show that both mortars containing healing materials only and mortars containing healing materials and Ca-Al LDH together mostly had higher migration-diffusion coefficients right after cracking, but the migration-diffusion coefficients decreased more than that of OPC with increasing healing ages, and thus, they yielded higher healing capacities than OPC. Also, mortars containing Ca-Al LDH together with healing materials showed higher reduction of their migration-diffusion coefficients, and thus, higher healing capacities than mortars containing healing materials only. This suggests that as the self-healing product increases on the crack surface, the binding of chloride ions by LDH inside the crack increases.
Keywords
Cement mortar; Chloride ion penetration; Layered double hydroxide (LDH); Self-healing; Crack;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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