Preliminary Study of Recycled Aggregate Mortar for Electric Arc Furnace Dust Encapsulation

This article shows the preliminary results of a study carried out to determine technical feasibility encapsulating high percentage EAFD in cement-based mortars manufactured with fine fraction recycled concrete aggregates (RCA). Two families mortars, natural aggregate as reference and RCA, were studied. An incorporation rate by weight two parts mortar one part was tested. The mechanical strengths (compressive strength tensile strength) before after immersion water, delitescence leaching behavior Mortars made RCA showed similar aggregates; however, decreased strengths. Encapsulation considerably reduced heavy metals, although Pb concentration remained above hazardous waste limit. With this study, wastes are managed together, have shown that use instead is viable alternative since it does not significantly impair or properties matrices used encapsulate EAFD.