Cement kiln dust in CIMENCAM Figuil (North Cameroon): characteristics and recycling as additives for blended cement production

Abstract This work presents the manufacture of CKD-blended cement from raw materials such as clinker, gypsum, marble and kiln dust (CKD) obtained CIMENCAM Figuil, North Region Cameroon. The were first characterized through XRF chemical analyses. Chemical tests (proportion free lime, loss on ignition, sulfate, insoluble residues), physical (fineness, consistency, setting time, expansion), compressive strength carried out manufactured cements mortars. Clinker is composed CaO (65.30%) SiO 2 (21.13%), with significant MgO (2.71%), Na O + K (1.29%), SO 3 (0.81%) lime saturation factor (97.9); which make this clinker good for production. Gypsum (36.32%) (33.92%) but contains very low proportion impurities; it therefore classified low-impurities gypsum suitable productions. dominantly (37.09%) (7.26%), (2.40%), (2.36%), Fe (1.82%) (0.18%); low-CaO calcitic-aluminosilicate ferrosilicate bearing marble. CKD made up (46.0%) (11.62%) significantly (1.02%), (2.16%); classifies alkalies-sulfate dust. , residues in increase an CKD. blaine specific surface area (BSSA) (4797–6346 cm /g) sieved (26.14–30.36%) show used prepared brick-shape hardened CKD-cement mortars (at 2, 7, 28 days) that, resistance depends (0% control, 5%, 10%, 15%, 20%… to 50%). Pressures 17.5 11.6 MPa was days, 28.9 20.0 7 35.5–23.3 days.