Performance of self-compacting concretes with wastes from heavy ceramic industry against corrosion by chlorides

This work analyses the influence of cement replacement by ground clay bricks waste (GCBW) on paste and concrete properties and on reinforcement corrosion triggered by chlorides. TGA/DTG of pastes show the GCBW pozzolanic effect. Porosity decrease in GCBW concretes contributes to their compressive strength increase. XRD tests show more Friedel's salt formation in GCBW paste. GCBW concretes revealed a decrease in chloride threshold due to their alkalinity decay and in chloride transport rate, what is explained by porosity reduction caused by pozzolanic and filler effects and binding ability improvement. Broadly, concretes with 20-30% of cement replacement presented the best performances.