Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: DÉBORA DE ALMEIDA NUNES
DATA: 14/05/2024
HORA: 13:30
LOCAL: Sala 5, galpão de materiais
TÍTULO: Effect of Concrete Degradation on Mechanical Properties, UPV, and Fracture Toughness Across Temperature and Age
PALAVRAS-CHAVES: Concrete degradation, Temperature variation, Drying age, Residual strength, Fracture toughness.
PÁGINAS: 32
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
RESUMO:

The research scrutinized the effect of concrete degradation by heating on axial compressive strength, fracture toughness and ultrasonic pulse velocity, varying the concrete age (100 days and 720 days) and exposure temperature (200 °C, 450 °C and 800 °C) and concrete class (C25 and C40). The concretes were subjected to ultrasound tests, fracture toughness and axial compression. Samples were obtained from the fracture section of the specimens for microstructural analysis by SEM, molecular analysis by Raman spectroscopy, and crystalline phases by XRD. The results denoted that the residual strength of the concretes did not vary with drying age, and the fracture toughness did not vary with increasing temperature, but with age.

MEMBROS DA BANCA:
Interno - 2080292 - CRISTIANE XAVIER RESENDE
Presidente - 1338723 - ROSANE MARIA PESSOA BETANIO OLIVEIRA
Interno - 2243395 - ZELIA SOARES MACEDO