Rapid estimation of chloride diffusion coefficient in concrete

R. K. Dhir, M. R. Jones, H. E. H. Ahmed, A. M. G. Seneviratne

Research output: Contribution to journalArticlepeer-review

Abstract

A simple potential dfference (PD) test is developed that can rapidly (within ∼ 10 days) provide a chloride diffusion index. The test utilizes a small applied potential difference (10 V dc) to accelerate the transport of chloride ions through concrete. Conventional nonperturbative, concentration difference (CD) tests have been carried out in parallel, with typical test periods of up to 12 months. Fick’s First Law of Diffusion is applied to calculate a diffusion index from the PD test, and the coefficient of chloride diffusion D from the CD test. A close relationship between these two parameters is shown, allowing D to be estimated from the rapid PD test.
Original languageEnglish
Pages (from-to)177-185
Number of pages9
JournalMagazine of Concrete Research
Volume42
Issue number152
DOIs
Publication statusPublished - Sep 1990

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