Banca de DEFESA: NATALIA MEDEIROS DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : NATALIA MEDEIROS DOS SANTOS
DATA : 30/07/2019
HORA: 09:00
LOCAL: Auditório do CTEC
TÍTULO:

Use of wastes from the beneficiation process of granite in paving layers


PALAVRAS-CHAVES:

Reject of granite; Partial substitution; Ground; Paving; CBR and Budget.


PÁGINAS: 95
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Geotécnica
RESUMO:

The pollution generated by mining activity is one of the main issues under
discussion in today's society. The reason for the worldwide concern is the
consequences of the planet, prompting the adoption of effective and less
harmful measures to the environment. In the local context, it is highlighted
the environmental problems caused by the tailings generated during
granite processing. The reuse used in this work comes from a deposit in
the region of Seridó potiguar, located between the municipalities of
Caicó/RN and São Fernando/RN. The objective of the study is the partial
replacement of the local soil, incorporating the granite waste, in the
proportions of 10%, 20% and 30% to the final mixtures of the paving
layers. Tests were carried out at the UFRN and CTGÁS-ER Soils
Laboratory to assess mineralogical, physical and mechanical properties.
The results showed that only the sample with 10% of granite tailings
(AM03) was efficient for the three types of paving layers (base, sub-base
and subgrade). The analyzes of the other samples presented caveats in the
results of the CBR or in relation to the expansion. In addition, the results
of a simulation related to the economic feasibility of the sample that
obtained the best performance were evaluated, based on the costs of a road
works tendered by the Infrastructure Superintendence - INFRA / UFRN.
The replacement of the soil in the layers of soil and base, by the material
accounted for at zero cost, caused a reduction of less than 1% of the total
value of the work. Although the partial replacement of the soil by the 10%
of waste present a negligible cost reduction, it is defended its incorporation
in the final mixture because this brings environmental benefits without
burdening the global value of the work.


MEMBROS DA BANCA:
Presidente - 1284389 - MARIA DEL PILAR DURANTE INGUNZA
Interno - 028.307.994-02 - ENIO FERNANDES AMORIM - IFRN
Interno - 1149451 - OLAVO FRANCISCO DOS SANTOS JUNIOR
Externo à Instituição - MARCONDES MENDES DE SOUZA - IFRN
Notícia cadastrada em: 08/07/2019 14:53
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