Banca de QUALIFICAÇÃO: TACIANA MARINA REIS ALVES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : TACIANA MARINA REIS ALVES
DATA : 16/12/2019
HORA: 10:00
LOCAL: PPGEC, CEFET-MG, campus II
TÍTULO:

 Use of overburden/mining tailings as raw material for One-Part Alkali Activated Materials

PALAVRAS-CHAVES:

alkali-activated materials, geopolymers, mining tailings, mining sludge, one-part method.

PÁGINAS: 47
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Construção Civil
ESPECIALIDADE: Materiais e Componentes de Construção
RESUMO:

This research evaluates the production of alkali-activated materials (AAM) via the one-part method (OPM), i.e. just add water, as a substitute for the traditional two-part activation method (TPM), in which water and alkaline solutions with high pH are used. The AAM precursor materials are tailings (overburden materials and sludge) from the iron mining activities in the state of Minas Gerais. They will be characterized and thermo-treated in the presence of dry alkaline activators (either Na₂SiO₃ or Na₂CO₃). Furthermore, the physical, mechanical and durability properties will be evaluated, as well as the effects on the microstructure. In a second moment, the same precursors will be combined with other aluminosilicates traditionally used in the AAM, i.e. blast furnace slag and metakaolin, in order to optimize activation and improve mechanical performance and durability. The TPM will be used to compare the performance of tailings and sludge activation by the two methods - OPM and TPM, whether or not containing blast furnace slag and metakaolin as activation promoting agents. A final proposal chapter aims to show the development of sustainable mortars by maximizing the use of tailings from mining, i.e. by using tailings and dam sludge as binders and granular tailings as aggregates.

MEMBROS DA BANCA:
Presidente - PAULO HENRIQUE RIBEIRO BORGES
Externo ao Programa - AUGUSTO CESAR DA SILVA BEZERRA
Externa ao Programa - LUCIANA BOAVENTURA PALHARES
Externo ao Programa - PATTERSON PATRICIO DE SOUZA