Amino acids as performance-controlling additives in carbonation-activated cementitious materials

This article presents an investigation on the application of amino acids to control CaCO3 crystallization in carbonation cured wollastonite composites. It was observed that carbonated without any acid formed calcite as primary polymorph CaCO3. In contrast, use admixtures resulted formation stable amorphous calcium carbonate (ACC), vaterite, and aragonite during wollastonite. The composites produced with were have a lower critical pore size, but higher total porosity, compared batch. Additionally, utilization increase flexural strength compressive up 106% 48%, respectively, Such performance enhancement presence attributed reduced size organic-inorganic hybrid phases matrix.