Banca de DEFESA: Matheus de Souza Silva

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Matheus de Souza Silva
DATE: 27/07/2023
TIME: 08:30
LOCAL: Plataforma Teams
TITLE:

EVALUATION OF CRACKS IN MORTAR FACADES USING THERMOGRAPHY

KEY WORDS:

Crack; Mortar; Facade; Thermography; Delta-T; Damage

PAGES: 125
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

Cracking is the most frequent anomaly in mortar coatings, as it is associated with a greater number of possible causes. Cracks can be investigated by infrared thermography, as defects on a surface have different temperatures compared to the region without a defect. The temperature of the defects observed by thermography is dependent on the crack dimension, indicating that for each crack dimension there is a different temperature observed in the thermogram. Because the cracks have characteristics related to size and shape, the possibility of classifying the damage of the cracks according to different widths and depths, for different forms of cracks, linear and branched, by thermography, during heating and cooling, is evaluated. It is proposed to observe the evolution of temperature, in the heating and cooling of mortar plates with linear and branched cracks with different widths and depths, aiming to identify, through the thermographic contrast Delta-T, the evolution trends of Delta-T depending on the shape of the crack. The temperature variations of the plates with linear and branched cracks are monitored, during heating and cooling, by means of thermograms, where trends in temperature evolution and investigation methods for cracks in mortar coatings are established. The investigation conditions and evolution trends of Delta-T established in the laboratory, are compared with a thermography investigation in the field, identifying if the trends of Delta-T and investigative method are observed and possible application. Thermography investigation, through the application of Delta-T, indicates that the linear and branched cracks have the same trend of evolution, where the Delta-T of the branched cracks is inferior, in module, to the Delta-T of the linear cracks. Delta-T, for linear and branched cracks, is maximum, in modulus, at the beginning of heating and cooling. Higher Delta-T values are associated with larger crack dimensions, where crack width has a greater influence on Delta-T values, compared to the influence of depth. The evolution trends of Delta-T of the linear and branched cracks observed in the laboratory, have the same trends of Delta-T of the cracks obtained in the field analysis, making it possible to use thermography in the inspection of cracks in mortar.

COMMITTEE MEMBERS:
Presidente - 404321 - ELTON BAUER
Interno - 1734221 - JOAO HENRIQUE DA SILVA REGO
Externo à Instituição - ELIER PAVÓN DE LÁ FÉ - UFOB
Externo à Instituição - ESEQUIEL FERNANDES TEIXEIRA MESQUITA - UFC