Banca de QUALIFICAÇÃO: FRANCISCO ARISTIDES DOS SANTOS NETO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : FRANCISCO ARISTIDES DOS SANTOS NETO
DATA : 06/07/2017
HORA: 10:00
LOCAL: Centro Federal de Educação Tecnológica de Minas Gerais
TÍTULO:

Fracture behavior of composites of cement pastes prepared with carbon nanotubes synthesized in clinker.

PALAVRAS-CHAVES:

carbon nanotubes, cement paste, fracture energy, tensile strength.

PÁGINAS: 40
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Estruturas
ESPECIALIDADE: Mecânica das Estruturas
RESUMO:

Recently, the investigations and technological advances that involving cement-based materials have shown excellent results in the development of high performance cementitious composites with high compressive strengths. Although their wide use in civil construction, cementitious composites are characterized by low tensile strength, energy absorption capacity and because they are susceptible to microcracks generated by retractions and/or acting loads. These characteristics are considered critical deficiencies that in addition to generating limitations to the structural design can affect the durability of the structures. In order to overcome these deficiencies, the reinforcement through the application of micro- or macrofibers is commonly employed. However, the cementitious composites show failures at nanometric scale which this traditional reinforcement is not efficient. Due to their excellent mechanical properties such as high tensile strength and deformation capacity, carbon nanotubes (CNT) are excellent candidates for reinforcing cementitious materials, suppressing the initiation and propagation of these failures and improving the mechanical properties of cementitious composites. In this scenario, this research aims to incorporate the CNT in the cement paste and investigate the effect in the fracture behavior of these cement pastes through the evaluation of tensile strength, flexural strain, tenacity and fracture energy. It is expected that the cementitious composites will have a less brittle behavior after the incorporation of a nanometer scale material with such exceptional properties as the carbon nanotubes.    

MEMBROS DA BANCA:
Interno - ELIENE PIRES CARVALHO
Externo ao Programa - JOSÉ MÁRCIO FONSECA CALIXTO - UFMG
Presidente - PETER LUDVIG
Externo ao Programa - WEBER GUADAGNIN MORAVIA