masterThesis
Caracterização de resíduos oriundos do beneficiamento do minério de ferro para uso em pavimentação
Fecha
2015-02-25Registro en:
DANTAS, André Augusto Nóbrega. Caracterização de resíduos oriundos do beneficiamento do minério de ferro para uso em pavimentação. 2015. 107f. Dissertação (Mestrado em Engenharia Civil) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2015.
Autor
Dantas, André Augusto Nóbrega
Resumen
Mining in Brazil has a key role in economic and social development, contributing
directly to improve the lives of the population. However, the mining activity even if
done responsibly and with a proper study of waste management to reduce the impact
of its effects, may cause harmful damage to the environment. Other forms of
pollution are also caused due to mining activity. The visual pollution caused by the
waste storage at open sky, in addition to the noise pollution caused by the excessive
noise of the machines both in the extraction of ore, as in processing. An alternative
way to lessen the environmental impacts caused by mining is the use of waste in
layers that will compose the pavements along the highways. Thus, this work sets out
to give a proper disposal of the wastes from the processing of iron ore, resulting from
the mining activity of the group of mining Mhag Services and Mining S/A, in the mine
of Bonito, located in Jucurutu, a town in the state of Rio Grande do Norte. The
residues of the iron ore were stabilized with a granular soil from the city of Macaiba,
also in the state of Rio Grande do Norte, which is being used in the duplication of the
BR-304 referring to the entitled passage of Reta Tabajara. The present work was
developed in three stages, being the first one divided by the chemical and
mineralogical tests, by the tests of physical characterization and by the tests of
paving for the residues of the iron ore. The second stage corresponds to the same
tests being performed for granular soil. The third stage includes the essays abovementioned
for three different mixtures of iron ore waste and granular soil, being they:
15% of iron-ore waste and 85% of granular soil, 25% of iron-ore waste and 75% of
granular soil, 50% of iron-ore waste and 50% of granular soil. The technical feasibility
of using waste from the iron ore beneficiation was checked, compressed in the
intermediate energy and modified for use in base layers, sub-base, reinforcement
subgrade and subgrade. The incorporation of the residues originating from the
improvement of the iron ore in highways will provide an alternative to the use of
aggregate conventionally used in the paving, besides preserving the environment.