Preliminary study of the effect of carbonation curing on geopolymers

Abstract Carbonation curing differs from weathering carbonation since it is performed intentionally at the early ages of cement hydration. This cure involves applying different levels CO2 (5% to 99%) concrete for a short period time, usually followed by conventional The objective this article was evaluate in metakaolin-based geopolymer concretes, activated with NaOH and Na2SiO3, compare them Portland (PC) concrete. following tests were applied: determination pH, depth, water absorption immersion, void index, compressive strength. results showed that after curing, had strength depth equivalent PC, but lower absorbed content. Although type absorbs less more sensitive carbonation. effect on ratio not remarkable. Furthermore, alkalinity concretes can be partially recovered subsequent immersion.