PORE SOLUTION CHEMISTRY OF THE HYDRATED SYSTEM TRICALCIUM SILICATE SODIUM-CHLORIDE WATER

The relative tendency of different Portland cements to remove chloride ions from concrete mix water by forming insoluble complexes is an important determinant of the corrosion behavior of steel in concrete. Whilst the C//3A phase plays a dominant role in binding chloride ions, other cement minerals may be of secondary importance but their effects are not well established. The reported investigation is an attempt to elucidate the extent to which chloride binding occurs within the hydration products of the C//3S (alite) phase of Portland cement when sodium chloride is present in the mix water.