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Journal of Material Sciences
ISSN: 2321-6212
I n t e r n a t i o n a l C o n f e r e n c e o n
Metal, Mining and
Magnetic Materials
N o v e m b e r 0 1 - 0 2 , 2 0 1 8
P a r i s , F r a n c e
Metal and Magnetism 2018
Ferrous slag and bauxite red mud application for cement less
production
Vsevolod Mymrin and Kirill Alekseev
Federal Technological University of Parana, Brazil
N
ewcompositematerialswere developed fromredmud, a residue frombauxitemining, which can be used in several applications
such as airfield runways, municipal waste dumps, and production of tiles among others. The composites contain 52 to 78 wt
% of red mud with pH value near 13.5, ground cooled ferrous slag (20-45%), and lime production waste (2%). The main objectives
of this research were to develop new environmentally efficient solutions for these three solid wastes as valuable components of
reusable materials and to study their structure formation processes. Different wet mixes of these three wastes were compacted
with a force of 10 MPa to cylindrical shapes of 20x20 mm and hardened at 94 to 96% humidity. The materials had axial resistance
strength 1.8, 3.4, 6.2 and 11.2 MPa on the 3
rd
, 7
th
, 14
th
, and 365
th
days respectively; coefficients of linear expansion ranged
between 0.3 and 4.76% and water absorption ranged from 1.8 and 9.31%. The hardening process was monitored by XRD, SEM,
EDS, and LAMMA demonstrating that new mainly amorphous formations are responsible for the materials’ structure formation.
Leaching and solubility tests showed that the new materials meet environmental standards for the intended applications.
seva6219@gmail.comJ Mat. Sci. 2018, Volume:6
DOI: 10.4172/2321-6212-C7-033