Evaluation of the leachability of heavy metals from cement-based materials

► The availability factor (FAV) for contaminant leaching varies with leachate pH. ► FAV changes with liquid/solid ratio (L/S) when release is controlled by solubility. ► FAV is taken equal to FAVP (pore-liquid availability factor) when L/S = bulk porosity. ► FAVP is used in calculation of effective diffusion coefficients in porous monoliths.