Banca de DEFESA: HUGO ALESSANDRO ALMEIDA DINIZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : HUGO ALESSANDRO ALMEIDA DINIZ
DATA : 05/04/2018
HORA: 10:00
LOCAL: A DEFINIR
TÍTULO:

STUDY OF DURABILITY INDICATIVES AND MECHANICAL PROPERTIES OF SELF COMPACTING CONCRETES WITH HIGH LEVELS OF MINERAL ADMIXTURES.


PALAVRAS-CHAVES:

Self-compacting concrete; Sugarcane biomass residues; Cement matrix; Porosity; Hydrated lime; CO2 penetration.


PÁGINAS: 120
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Construção Civil
ESPECIALIDADE: Materiais e Componentes de Construção
RESUMO:

Self-compacting concrete (SCC) is an innovative product that has fluidity and cohesion to traverse the entire length of the part and fill the spaces between armatures, optimizing the execution of concrete and reducing costs with labor. For this it is necessary to increase the content of fines, and consequently of cement, the main pollutant compound of the concrete. The use of mineral admixtures rich in amorphous silica and aluminum such as Metacaulim, pozzolan rice husk and sugarcane biomass are an alternative to the reduction of cement, since they confer benefits to the cement matrix and are industrial waste. However, the admixtures cause the reduction of Calcium Hydroxide, the protective barrier of concrete against carbonation. In this attack there is reduction of alkalinity and formation of carbonate products that alter the porous structure of the matrix and make the environment aggressive to the reinforcements. As the pore network is responsible for the entry of CO2, the present project intends to investigate the influence of porosity and realcalinization with hydrated lime on self-compacting concretes, with low cement content and high levels of mineral additions from industrial and agroindustrial residues, submitted to carbonation processes. It is expected to correlate the fluid transport properties within the SCC with the carbonation process, evaluating the action of the realcalinization through the hydrated lime in the fight against CO2 penetration, due to the pozzolanic reactions and the high cement substitution content; And, the alteration of the behavior of the SCC with different residue rates of sugarcane biomass.


MEMBROS DA BANCA:
Presidente - 022.621.844-96 - MARCOS ALYSSANDRO SOARES DOS ANJOS - IFRN
Interno - 1507841 - MARIA DAS VITORIAS VIEIRA ALMEIDA DE SA
Externo à Instituição - GIVANILDO ALVES DE AZEREDO - UFPB
Notícia cadastrada em: 19/03/2018 11:24
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