Banca de DEFESA: FRANCISCO DAS CHAGAS DA COSTA FILHO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : FRANCISCO DAS CHAGAS DA COSTA FILHO
DATA : 03/02/2017
HORA: 09:00
LOCAL: Sala de Aula do PEC
TÍTULO:

TECHNICAL FEASIBILITY STUDY OF USING WASTE FROM SCHEELITE PROCESSING IN COMPOSITION OF ASPHALTIC CONCRETES


PALAVRAS-CHAVES:

Brejuí Mine. Asphaltic. Concrete. Floors. Mining Wastes. Scheelite.


PÁGINAS: 145
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Construção Civil
ESPECIALIDADE: Materiais e Componentes de Construção
RESUMO:

The Brazilian mineral production is an extremely important activity for the country's economy, since in addition to contributing to gross national product - PIB, it is responsible for the generation of many direct and indirect jobs. Therefore, the Tomaz Salustino Corporation Mining (Brejuí Mine) is a important northeastern representative of this sector. Data for 2012 show that the production of the Brejuí Mine was around 20 tons per month (MACHADO 2012), representing more than 300 jobs generated, in addition to the development of the municipality where the company is located. However, due to the ore (scheelite) processing, since 1943, tons of waste have been generated, and it is currently estimated around 7 million tons (4.5 million thick fractions and 2.5 million fine fractions), disposed in piles and waste basins, generating several environmental impacts, such as the modification of the local landscape. Due of this large stock of waste, jointly with the great extraction of natural raw material to compose the usual layers of a pavement, the present study evaluated the technical feasibility of the residues from the Brejuí Mine in the composition of asphaltic concretes, replacing the natural small aggregate by the thick fractions of the residue, and the conventional filler by the fine fractions of the residue. For this, chemical and mineralogical characterization of fractions of the residue and of the natural aggregates used in the research, besides Marshall dosages in compositions of asphaltic concretes was carried out to analyze the volumetric parameters and the stability of the materials as for the use in road works. From the proposed experimental program, it can be verified that the thick fractions of the scheelite processing residue presented a high potential to be used in natura as a small aggregate, because the analyzed specimens showed good performance in relation to the volumetric parameters and the Marshall stability. The fine fraction has also proved feasible to be used as an artificial filler, however, for this application, it is necessary to improve the quality for that the fraction of the residue fits as asphalt mixtures filling material since, in natura, it did not present the 65% passing material in the 0.075 mm sieve required by DNER - EM 367/97 (BRASIL, 1997).


MEMBROS DA BANCA:
Presidente - 1284389 - MARIA DEL PILAR DURANTE INGUNZA
Interno - 1149451 - OLAVO FRANCISCO DOS SANTOS JUNIOR
Externo à Instituição - ENIO FERNANDES AMORIM - IFRN
Externo à Instituição - LUIS FERNANDO MARTINS RIBEIRO - UnB
Notícia cadastrada em: 31/01/2017 15:00
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