Models of variation of chloride ion diffusion as a function of changes in the saturation degree (SD) of concrete mixes prapared with pozzolanic cement

Abstract

As GUIMARÃES (2000), CLIMENT et al. (2002) and NIELSEN and GEIKER (2003) demonstrated, the saturation degree (SD) of concrete greatly influences the chloride ion diffusion. GUIMARÃES and HELENE (2005) developed a model of changes in the SD using a single mortar mix with pozzolanic cement. In the present work, several models using different concrete mixes with pozzolanic cement were designed. In addition to these models, the study showed that the w/c ratio and the slump of the concrete are significant factors in the models of variation of the diffusion coefficient of chloride ions as a function of changes in the degree of saturation of concrete.