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Page 54
allied
academies
Journal of Materials Science and Nanotechnology | Volume: 2
August 20-21, 2018 | Paris, France
Materials Science and Materials Chemistry
International Conference on
Formulation of Calcium dialuminate (CaO•2Al
2
O
3
) refractory cement from local bauxite
A B Tchamba, J C Sofack, R Yongue
and
U C Melo
University of Yaounde, Cameroon
T
hree types of bauxites containing aluminium 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 theXRDcurves thepresence
of CaO•2Al
2
O
3
and CaO•TiO
2
phases in the cement samples.
The density of cement powder varied between 2.95 and 3.17 g/
cm3and the specific area of the 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
(C
3
AH
6
, AH
3
, CA
2
and CaO•TiO
2
). The Young’s modulus of the
cement made varied between 35.5 and 39.4 GPa, and these
Young’smoduliwerecompared toconventional CA14Mcement.
e:
attchamba@yahoo.fr