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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Study of Temporal Change in Chloride Diffusion Coefficient of Concrete
Author(s): Hongfa Yu, Yongshan Tan, and Taotao Feng
Publication: Materials Journal
Appears on pages(s): 103-112
Keywords: chloride diffusion coefficient; service-life prediction model; time-dependent index
Abstract:The chloride diffusion coefficient (Dt) is an important parameter that measures chloride penetration of concrete and characterizes the chloride diffusion rate in concrete. A larger value of Dt indicates that chloride can more easily penetrate concrete. In this paper, chloride concentration data collected from 2207 marine exposure stations and practical projects in 20 countries were investigated. The Dt values were recalculated according to different chloride diffusion models. For the ordinary concrete and high-performance concrete data, the exposure times ranged from 7 days to 91 years. The temporal change in Dt was systematically studied and a universal time-dependent index (m) value was proposed. In addition, other targeted values were proposed for different types of concrete or exposure zones.
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