Effect of the addition of electric arc furnace dust on the mechanical properties and carbonation performance of concrete

Abstract

The addition of Electric Arc Furnace Dust (EAFD) in concrete is a good solution to encapsulate its potential toxic elements and to contribute to the valorisation of industrial wastes. This paper investigates the feasibility of using EAFD as an addition to concrete production. Four experimental mixes have been produced (one of traditional concrete and three introducing a 5, 10 and 15% of EAFD per cement weight without replacing any material). The mechanical properties of the resultant concrete mixtures (compressive strength, elastic modulus and density) were evaluated. In addition, the natural carbonation of EAFD concrete mixtures was studied. Finally, a microstructural campaign was carried out to study the morphology and microstructure of the considered concrete mixtures. Results showed that concrete with an addition of 15% of EAFD per cement weight had a higher compressive strength and elastic modulus and a lower carbonation depth in comparison with traditional concrete.