Predicting chloride diffusion coefficients from concrete mixture proportions

Fick's second law of diffusion is typically used to estimate the corrosion service life of concrete structures. To use Fick's law, an estimate of the effective chloride diffusion coefficient is required. Historically, chlorid e profile test data from hardened concrete were required to estimate chlori de diffusion coefficients. This paper provides an equation to estimate the chloride diffusion coefficient from known concrete mixture proportions, and other easily obtained quantities when test data are not available. This eq uation was developed by statistical analysis of a database containing chlor ide diffusion coefficients for concrete obtained from migration tests and h as the potential for use as an engineering tool for optimizing concrete mix ture proportions to satisfy corrosion service life design criteria during p reliminary cost/benefit analysis.