Title:
Similarities in Accelerated Chloride Ion Transport Tests for Concrete in Tidal Zones
Author(s):
Qing-Zhang Zhang, Xiang-Lin Gu, Zhi-Lu Jiang, and Wei-Ping Zhang
Publication:
Materials Journal
Volume:
115
Issue:
4
Appears on pages(s):
499-507
Keywords:
accelerated test; chloride ions; similarity; tidal zone
DOI:
10.14359/51702007
Date:
7/1/2018
Abstract:
The model for chloride transport in concrete was established by considering both effects of diffusion and capillary suction. The model was verified by chloride penetration tests under cyclic wetting and drying conditions. The developed model was used to analyze similarities under different environmental conditions for accelerated tests. The results showed that the influence of external chloride concentration on chloride penetration was smaller with a larger depth. When the ambient relative humidity (RH) decreased, the penetration rate increased when RH was larger than 70%. However, the penetration rate decreased when the RH was smaller than 70%. The results also indicated that when the wetting-to-drying time ratio in a cycle increased, the penetration rate increased first and then decreased after a critical ratio. When the cycle period decreased, the penetration rate first increased and then decreased during a small time period.
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