Dissertação

{en_GB=Methodology to assess microbiological colonization on ETICS façades} {} EVALUATED

{pt=Not needed, en=This thesis describes a methodology to identify and characterize types of anomalies, especially the microbiological growth. Micro-organisms are playing an important role in the biodegradation of ETICS (External Thermal Insulation Composite Systems) in combination with biotic and abiotic factors. The development of microbiological growth causes stains and biofilms formation on the cladding surface. Based on a proposed methodology consisting of a visual assessment and diagnosis methods, a case study was developed. The visual assessment consisted of observing 56 façades or approximately 22 000 m² of ETICS. The observations were limited due to the fact that it is difficult to identify types of biological colonization. It was possible to distinguish types of stains, such as the uniform and differential stains. This kind of stains have an impact on the aesthetic of façades. The diagnosis methods had to further reveal whether it was indeed possible to identify biological colonization. These methods consist of several phases, starting with a simple test in order to move on to more detailed tests, with a more specific result. The sequence was as follows: the magnifying glass, the digital microscope, bleach test and the scanning electron microscope (SEM). After these tests, it was found that it is still difficult to distinguish between types of biological colonization. The combination of all the tests of the proposed methodology reduce the uncertainty of the diagnosis. Further research, such as DNA, could lead to identification.}
{pt=not needed, en=ETICS, Microbiological growth, Type of stain, Visual assessment, Diagnosis method}

Junho 6, 2019, 8:30

Orientação

ORIENTADOR

Inês Dos Santos Flores Barbosa Colen

Departamento de Engenharia Civil, Arquitectura e Georrecursos (DECivil)

Professor Associado

ORIENTADOR

Nathan Van Den Bossche

Ghent University

Professor Associado