Formulation of calcium dialuminate (CaO•2Al2O3) refractory cement from local bauxite

2^nd International Conference and Expo on Ceramics & Composite Materials

July 25-26, 2016 Berlin, Germany

A B Tchamba, J C Sofack, R Yongue and U C Melo

University of Yaounde, Cameroon
ENSCI, France
Local Materials Promotion Authority, Cameroon

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Three types of bauxites containing aluminum hydroxide of 58.1% gibbsite and 19.3% boehmite for BX3, 95.5% of gibbsite for BX55 and 84.5% of gibbsite for BX8 were used with lime at 95% of CaO through solid state sintering in one stage to prepare a refractory clinker at 1550�°C. The powder obtained after grinding the clinker showed in the XRD curves the presence of CaOâ�¢2Al2O3 and CaOâ�¢TiO2 phases in the cement samples. The density of cement powder varied between 2.95 and 3.17 g/cm3 and the specific area of powder obtained after grinding was between 0.72 and 0.85 m2/g. The properties of hydrated cement, W/C = 0.33, after stabilization of cement components for 48 h at 105�°C were showed by XRD, DTA, DTG and SEM (C3AH6, AH3, CA2 and CaOâ�¢TiO2). The Youngâ��s modulus of the cement made varied between 35.5 and 39.4 GPa, and these Youngâ��s moduli were compared to conventional CA14M cement.

Biography :

Email: attchamba@yahoo.fr