Institute of Building Research Conducts Defect Detection on Exterior Wall Finishes
Release Date:
2017-11-07
Recently, the Institute of Construction Science invested several hundred thousand yuan to acquire the most advanced infrared thermal imager currently available on the market—the FLIR T460 model manufactured by FLIR Systems in the United States. Following successful equipment commissioning and personnel training, the institute now possesses a well-established capability for detecting delamination, defects, and potential hazards in exterior wall finish systems and external thermal insulation systems, enabling it to clearly pinpoint the root causes of exterior wall water leakage. In recent years, the construction industry has been undergoing rapid development, with widespread adoption of energy-efficient building practices; however, hidden problems such as delamination and water leakage in exterior wall finishes, as well as spalling of external thermal insulation systems, have become increasingly prominent. After conducting extensive research, the Institute of Construction Science found that infrared thermography...
Recently, the Institute of Construction Science invested several hundred thousand yuan to acquire the most advanced infrared thermal imager currently available on the market—the FLIR T460 model manufactured by FLIR Systems. Following successful equipment commissioning and personnel training, the institute now possesses a robust capability for detecting delamination, defects, and potential hazards in exterior wall finish systems and external thermal insulation systems, enabling it to clearly pinpoint the root causes of exterior wall water leakage.
In recent years, the construction industry has been undergoing rapid development, with energy-efficient building practices becoming increasingly widespread. However, hidden risks such as hollowing and delamination of exterior wall finishes, water leakage, and detachment of external thermal insulation systems have become increasingly prominent. Following extensive research, the Institute of Building Research has determined that infrared thermography is the preferred method for detecting defects like hollowing and leakage in building exteriors. This technique offers numerous advantages, including portability, speed, visual clarity, non-contact operation, non-destructive testing, large-area coverage, long-range detection, and high precision, making it particularly well suited for comprehensive inspections of both newly constructed buildings built using full-bonding methods and the exterior walls of various existing structures.
The principle of infrared imaging is to use an infrared detector and an optical imaging objective lens to capture the distribution of infrared radiation emitted by the target object, projecting this distribution onto the photosensitive elements of the infrared detector and thereby generating an infrared thermal image. This thermal image corresponds directly to the object’s surface temperature distribution. Different colors in the thermal image represent different temperatures on the object’s surface, with warm colors indicating higher temperatures and cool colors indicating lower temperatures. When voids or defects occur in the exterior wall finish material, heat conduction between the exterior wall and the building structure decreases. Consequently, when the exterior wall surface absorbs heat from solar radiation or from warmer outdoor air, areas with voids or defects will exhibit higher temperatures than normal; conversely, as solar radiation diminishes or ambient air temperatures drop and the exterior wall surface cools, these same areas will register lower temperatures compared with intact sections.
The Institute of Construction Science will leverage state-of-the-art testing equipment and a team of world-class testing professionals, steadfastly upholding the principles of impartiality and scientific rigor, to provide first-rate testing services to domestic and international enterprises and a broad base of users.
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