PREDICTION OF DIFFUSIVITY OF CONCRETE BASED ON SIMPLE ANALYTIC EQUATIONS

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Diffusivity of saturated ordinary Portland cement-based materials: A critical review of experimental and analytical modelling approaches (2016, methodology): “Models/reference Effective diffusivity of cement paste Effective diffusivity of concrete Fitting Parameters Empirical models Archie's relationship [91]; Nokken and Hooton [101] – Dem=c ¼ Aϕn A, n Halamickova et al. [148] – Dcon=a1+a2rc a1, a2 Effective media theories Constant diffusivity in ITZ Diff”
Effect of crack width on chloride diffusion coefficients of concrete by steady-state migration tests (2011, background): “Thus, the prediction of chloride penetration into concrete has been an important issue in the design of concrete structures for the last several decades, and studied by a number of investigators [1–10].”
Aggregate shape effect on the diffusivity of mortar (2014, methodology): “The experimental results also show a certain variability attributed to different test methods (under steady-state regime [52,54–56] or non-steady-state regime [57,58]), different diffusion species (chlorides [54,56–58], oxygen [55], tritiated water [52]), different sand grading [54,58], different w/”