Rapid estimation of chloride diffusion coefficient in concrete

TY - JOUR

T1 - Rapid estimation of chloride diffusion coefficient in concrete

AU - Dhir, R. K.

AU - Jones, M. R.

AU - Ahmed, H. E. H.

AU - Seneviratne, A. M. G.

PY - 1990/9

Y1 - 1990/9

N2 - 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.

AB - 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.

U2 - 10.1680/macr.1990.42.152.177

DO - 10.1680/macr.1990.42.152.177

M3 - Article

SN - 0024-9831

VL - 42

SP - 177

EP - 185

JO - Magazine of Concrete Research

JF - Magazine of Concrete Research

IS - 152

ER -