CHLORIDE BINDING IN GGBS CONCRETE

This paper reports the results of chloride binding measurements of GGB S pastes, as well as chloride diffusion and permeability measurements of GGBS concrete mixes. Chloride binding capacity was found to increas e with increasing GGBS replacement levels and the chloride exposure co ncentration. Thermal analysis measurements suggest that much of the im provement in chloride binding is a result of high aluminate levels in GGBS leading to the production of higher quantities of Friedel's salt. When concrete mixes with relatively similar permeabilities are used t he chloride binding capacity of the cement matrix becomes a major dete rmining factor in how resistant the concrete is to chloride permeation . Copyright (C) 1996 Elsevier Science Ltd