Banca de DEFESA: RENATA BORGES JACOE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RENATA BORGES JACOE
DATA : 21/06/2017
HORA: 14:00
LOCAL: Centro Federal de Educação Tecnológica de Minas Gerais
TÍTULO:

CURA COM CARBONATAÇÃO ACELERADA COMO ESTRATÉGIA PARA MAIOR DURABILIDADE DE FIBROCIMENTOS REFORÇADOS POR POLPAS CELULÓSICAS PROCESSADAS POR DIFERENTES METODOS.

PALAVRAS-CHAVES:

Accelerated carbonation; rice husk ash; cementitious composites; cellulosic fiber.

PÁGINAS: 103
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Construção Civil
ESPECIALIDADE: Materiais e Componentes de Construção
RESUMO:

Cementitious composites made with natural fibers are an alternative to the use of asbestos, which is well recognized as a carcinogenic material. However, due to the alkalinity of the cementitious matrix, the durability of these composite is compromised due to mineralization of the fibers. Several alternatives are proposed as a treatment for durability, including the change of the matrix by incorporating pozzolanic mineral additions and accelerated carbonation at early ages. Both treatments are focused primarily on reducing the pH of the matrix by means of chemical reactions that consumes calcium hydroxide. The efficiency of the treatment is analyzed by means of mechanical and microstructural analysis tests, although the behavior of the material when subjected to the degrading g means is also investigated. The objective of this work is the use of accelerated carbonation as a treatment approach; comparing it to the incorporation of rice husk ash in the matrix as pozzolanic addition. Thus aiming to analyze possible variations in production to improve the durability of the composite, as well as its performance. Accelerated degradation cycles (wet-drying) were simulated in the laboratory to verify the effectiveness of treatments used. The results showed that treatments reduced material degradation and in some cases led to better composites than the reference (the untreated composite).

MEMBROS DA BANCA:
Externo à Instituição - ALDO GIUNTINI DE MAGALHÃES - UFMG
Presidente - CONRADO DE SOUZA RODRIGUES
Interno - PETER LUDVIG