研究目的
To study the feasibility of the use of thermography in the detection of infiltrations due to accidental causes in internal walls.
研究成果
Infrared thermography is effective for detecting hidden moisture infiltrations in internal walls, especially with porous coatings that allow evaporation. The technique can identify anomalies before they become visible, aiding in early detection and decision-making for building maintenance. However, its efficiency is reduced with impermeable coatings, and standardization of procedures is needed for broader application.
研究不足
The technique's effectiveness is limited by the type of coating; impermeable coatings reduce thermal contrast, making detection difficult. The study was conducted in a controlled laboratory environment, and results may vary in real-world conditions. The use of heated water influenced temperature readings, and the method requires significant thermal differences to be effective.
1：Experimental Design and Method Selection:
The study used passive infrared thermography to detect moisture infiltrations in masonry walls with different coatings. The methodology involved constructing prototypes with various coating types and simulating leaks using a drilled PVC pipe. Thermograms were captured at specific intervals to monitor infiltration progress.
2：Sample Selection and Data Sources:
Five wall prototypes were built with ceramic bricks and different coatings: uncoated, plaster, plaster with latex paint, plaster with acrylic paint, and plaster with ceramic tiles. Each had a drilled PVC pipe for water leakage simulation.
3：List of Experimental Equipment and Materials:
Equipment included a FLIR E-60 infrared camera, thermohygrometer for ambient conditions, and materials such as ceramic bricks, plaster, paints, ceramic tiles, and PVC pipes. Software used was FLIR Tools for data analysis.
4：Experimental Procedures and Operational Workflow:
Walls were constructed, and water was introduced through the pipe at a constant flow for 2 hours. Thermograms were taken at multiple time points (e.g., 5 minutes, 2 hours, 48 hours, 1 week) to observe thermal gradients. Ambient temperature and humidity were controlled.
5：Data Analysis Methods:
Thermal gradients (ΔT) were calculated between dry and wet areas using temperature measurements from specific points on the walls. Data were analyzed qualitatively and quantitatively to assess the effectiveness of thermography.
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