Phase development and mechanical response of low-level cement replacements with wood ash and washed wood ash

A significant increase is seen worldwide in the amounts of wood ashes (WAs) produced by heating and power industry. This study investigates potential utilisation two different WAs as low-level cement replacements, an untreated a washed version. Phase development mechanical response were investigated. Results indicated ettringite formation mainly to contribute strength until excessive formation. Indications optimum SO3/C3A ratio for mixtures with replacement WA was between 0.4 0.5. Washed originating from grate combustion appeared be most promising tested cement-based materials.