Porous refractory ceramics using agrowastes and some kaolinitic clays
A. Pountouenchi,
E.J.A. Ndzana,
I.C. Mountapbeme,
S. Njuhou,
A. Njoya,
N. Fagel,
P. Pilate,
D. Njoya,
J.A. Mbey
Affiliations
A. Pountouenchi
Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, PO BOX 812, Yaounde, Cameroon
E.J.A. Ndzana
Department of Chemistry, Higher Teacher Training College, University of Yaoundé I, PO BOX 47, Yaounde, Cameroon
I.C. Mountapbeme
Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, PO BOX 812, Yaounde, Cameroon
S. Njuhou
Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, PO BOX 812, Yaounde, Cameroon; Corresponding author.
A. Njoya
Department of Arts, Technology and Heritage, Institute of Fine Arts of Foumban, University of Dschang, PO BOX 31, Foumban, Cameroon
N. Fagel
Laboratoire Argiles, Géochimie et Environnements Sédimentaires (AGEs), Department of Geology, Faculty of Sciences, University of Liège, Liège, B-4000, Belgium
P. Pilate
Belgian Ceramic Research Center, Avenue Gouverneur Emile Cornez 4, 7000, Mons, Belgium
D. Njoya
Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, PO BOX 812, Yaounde, Cameroon; Corresponding author.
J.A. Mbey
Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, PO BOX 812, Yaounde, Cameroon
In the purpose of making low cost porous refractories bricks, two kaolin named MY3 and KG from the locality of Foumban in Cameroon are used together with a rice husks (Br) and coffee residues (Rc). The formulations made of mixture of chamotte, raw clay as a binder and agricultural wastes in varying proportions, are fired at 1200 °C for 4 h. The addition of chamotte from 10 to 60 % in the studied clays, contributes to a reduction of firing shrinkage. The mineralogy of the products is made of mullite (34–38 %) which is associated to cristobalite (10–19 %), quartz (14–20 %) and amorphous phase (23–39 %). The addition of 10–20 % of agrowastes causes a reduction in the apparent density of 13 % and an increase in the open porosity of 14 %.
