Infrared Thermography for Building Moisture Inspection, ISBN-13: 978-3319753850
[PDF eBook eTextbook]
- Series: SpringerBriefs in Applied Sciences and Technology
- 72 pages
- Publisher: Springer; 1st ed. 2019 edition (September 27, 2018)
- Language: English
- ISBN-10: 3319753851
- ISBN-13: 978-3319753850
This book presents the state-of-the-art in infrared thermography (IRT) applications with a focus on moisture assessment in buildings. It also offers practical discussions of several case studies, including comparisons of IRT with other surface temperature measurement techniques. In closing, it demonstrates how IRT can be used to assess capillary absorption, and addresses moisture in walls due to wind-driven rain infiltrations, and the drying process.
The book equips readers with a deeper understanding of the ideal conditions for accurate IRT assessment and offers practical recommendations.
Moisture is one of the most deteriorating factors of buildings. Tracing it, using non-destructive techniques, is an obvious advantage, especially for buildings in use. The problem of moisture in buildings has always aroused great interest. Moisture damage may occur both due to the presence of moisture itself and/or due to its evaporation. Besides the degradation of materials and components, compromising their performance, durability, mechanical resistance, waterproofness and appearance, it can also cause poor indoor conditions resulting from biological growth.
Moisture content is traditionally assessed using destructive procedures, which require collecting a wall sample to be weighed in the laboratory. However, moisture content can also be assessed using non-destructive techniques as moisture detectors. These techniques may not be as accurate as the destructive procedures; however, they are very easy to use and deliver real-time results. Infrared thermography (IRT) is a non-contact and non-destructive testing technology that can be applied to determine the surface temperature of an object. Nevertheless, the procedures to detect moisture in building components using IRT are still under development as it is not clear if it can be used to detect moisture before any visible marks occur. However, changes in moisture content are related to changes in surface temperature and can, therefore, be detected by IRT, due to three physical phenomena: evaporative cooling at the moist area; reduced thermal resistance; and increased heat storage capacity of the moist material.
The main benefit of this book is that it provides a discussion about the opportunities and limitations of IRT to assess moisture-related pathologies in buildings using several practical models as example cases. Its special features are: (a) a state of the art of buildings-related IRT applications with the main focus on moisture assessment; and (b) practical discussion of several case studies, namely (b1) several set-ups and boundary conditions were created to compare IRT with other surface temperature measurement techniques and to understand the ideal conditions for accurate IRT; (b2) IRT was used to assess capillary absorption on a full-scale laboratory model and the drying process; (b3) IRT was used to assess moisture in walls due to wind-driven rain infiltrations in buildings in use; and (b4) IRT was used to assess the drying process of exterior walls.
This subject is appealing to the scientists, the engineers and the students. At the same time, this book will be going to the encounter of a variety of scientific and engineering disciplines, such as civil engineering, architecture, physics.
About the Author
Eva Barreira is an Assistant Professor with the Department of Civil Engineering at the University of Porto. She is the author of more than 150 papers for international conferences and journals in the fields of building physics, building diagnosis and construction technology. His main research interests are in heat and mass transfer, energy efficiency, thermal comfort, ventilation, indoor environmental quality, in situ testing, building pathology and rehabilitation.
Ricardo Almeida is an Assistant Professor with the Department of Civil Engineering at the Polytechnic Institute of Viseu. He is the author of more than 150 papers for international conferences and journals in the fields of building physics, construction technology and cultural heritage. His main research interests are in building diagnosis, energy efficiency, thermal comfort, ventilation, indoor environmental quality, in situ testing and building simulation.
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