Juniper Publishers Abstract A method is under developed for capture of carbon dioxide directly from combustion emissions into land filled coal ash, and simultaneous transformation of the carbon dioxide and ash with supplementary minerals into a hydraulic binder. In this study, several additives were investigated for raising the CO 2 uptake of land filled ash and enhancing the end-product quality. The resultant binder meets the standard requirements for hazardous waste solidification and stabilization. The approach adopted here relies upon mechanochemical phenomena, induced by a simple milling action, to incorporate carbon dioxide into land filled ash while concurrently transforming the raw materials (including the captured carbon dioxide) into a hydraulic binder. The CO 2 uptake in mechanochemical processing of cement was estimated as the difference in Loss of Ignition (LOI) of cements milled in CO 2 and in air. The compressive strength achieved by hydration o...