Valorization of Cement Kiln Dust (CKD) from the Ain-Al-Kebira Cement Plant (Algeria) in Building Materials

Abstract

Solid waste management is one of the world's major environmental concerns. Cement Kiln Dust (CKD) is a by-product of cement manufacturing. It is a fine-grained, solid and highly alkaline particulate material. Environmental concerns related to Portland cement production, CO2 emissions and CKD disposal are becoming increasingly important. Replacing some of the cement with CKDs will significantly reduce the amount of clinker to be produced, which will then reduce CO2 emissions into the atmosphere and transform the CKDs into useful products while allowing sustainable concrete/mortar to be produced in an environmentally friendly way. This work is part of the recovery of machining waste from the manufacture of cements produced from a local Algerian cement plant, in particular CKD. Study of the use of CKD influence in mortar and concrete reveals that the percentage increase in CKD accelerates setting time. From the obtained results (simple compression and bending tension) we can conclude that the use of CKD in mortar can be favorable for substitution and/or addition up to 10%.