Analysis of building facade defects using infrared thermography: Laboratory studies

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Elton Bauer (Author) Other; Elier Pavón (Author) Other; Eva Barreira (Author) FEUP; Eliane Kraus de Castro (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: JOURNAL OF BUILDING ENGINEERING

Vol. 6

Pages: 93-104

ISSN: 2352-7102

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 22 Citations

INSPEC

Scientific classification

CORDIS: Technological sciences > Engineering > Civil engineering

FOS: Engineering and technology > Civil engineering

Other information

Authenticus ID: P-00K-93C

DOI: 10.1016/j.jobe.2016.02.012

Abstract (EN): One of the main problems facing the inspection of facades by means of passive infrared thermography, in order to identify and evaluate defects or pathologies, is the definition of the most appropriate moment to perform the inspection. Most studies focus on the Delta-T value as a criterion for the identification and evaluation of defects. Nevertheless, the identification of defects will primarily depend on the heat flux, since the way defects appear on the thermogram is determined by their type and by the direction of the flux. This study set out to analyse this problem by studying the behavior of the Delta-T and contrast functions in defects in ceramic tiles and mortar. Accordingly, test samples were made with induced defects during the manufacturing process, to simulate the detachment problems that occur with ceramic tiles of different thicknesses and cracks of different depths. The test samples were assessed during direct and inverse heating cycles. The results showed that it is possible to detect differences in behavior when varying the thickness of the ceramic tiles and the depth of the cracks by considering the Delta-T and contrast functions. In consequence, the inspection moment should be defined according to the behavior of the gradient temperature, the type of the defect and the direction of the heat flux.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12