Process for production of hydraulic-carbonating binder systems through mechanochemical activation of minerals

Abstract

Described herein are processes for synthesizing hydraulic-carbonating binder systems through mechanochemical process, including providing a blend of material stream one of aluminosilicate or calcium aluminosilicate mineral material and material stream two of alkaline-rich mineral material; and simultaneously fractioning the blended minerals while contacting the blended minerals with a CO-containing in the mechanochemical reactor. This binder system is useful for cementation functions in concrete. The precipitated carbonation products are mainly calcium carbonates (CaCO), magnesium carbonates (MgCO), and amorphous alumina-silica gel. The developed binder system is activated through hydration and/or concurrent hydration-carbonation reactions in concrete and it can be utilized in the form of slurry or dried powder for a wide range of precast and cast-in-place or ready-mix concrete applications. The binder system reacts with cement in concrete to form carbonate/calcium-silicate-hydrate (C—S—H) composite phases that result in enhanced mechanical properties.