Solubility and speciation of iron in cementitious systems

Aqueous iron hydrolysis products and chloride complexes influence steel corrosion kinetics dictate the amount type of formed. Here, we compile a thermodynamic database devoted to aqueous species solid oxides as well complexes, aiming describe their speciation solubility within prevailing chemical environment interest for cementitious systems. We compare calculations empirical data on elemental composition pore solutions from It is found that dissolved concentrations in cement can differ considerably predictions. In particular, measured Fe(II) exceed limit by 2–5 orders magnitude. Additionally, experimentally obtained presence discuss these differences may be explained so far unknown stabilisation intermediate phases such green rust, or due (kinetic) hindrance precipitation.