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Drying evaluation using infrared thermography

机译：使用红外热成像进行干燥评估

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The effect of moisture in buildings is normally related with damage, which may occur due to the presence of moisture itself or due to its evaporation. The drying process plays an important role in the available moisture, both inside the material or at its surface, so its evaluation is of great importance. Infrared thermography (IRT) is a non-contact and non-destructive testing technology that can be applied to determine the surface temperature of an object. It is commonly used as a diagnostic tool, enabling studies related to the thermal behaviour of building elements as well as to identify anomalies and degraded areas. Although less common, IRT is also used to assess moisture in building components. In this work it was analyzed the applicability of IRT to assess the drying process of exterior walls after a long-term rainy weather. The test campaign started when the rain period stopped and a period of sunny days began. To assess the drying process, besides infrared camera, it was also used a moisture detector to evaluate qualitatively the walls' moisture content. Measurements were carried out during six consecutive days without rain, at 10:00, 12:00, 14:00, 16:00 and 18:00. Two walls were assessed: one facing southeast, exposed to direct solar radiation, and one facing northeast, with no incident solar radiation. Moisture detector results show that the walls dry out along the test campaign, being the drying process more intense in the wall facing southeast. That is mainly related to the fact that the wall was exposed to direct solar radiation during a longer period, which enabled the drying process to be fastened. The results obtained with both methods were combined and the opportunities and limitations of IRT to assess the drying process in outdoor conditions were discussed.
机译：水分在建筑物中的影响通常与损伤有关，这可能由于水分本身存在或由于其蒸发而发生。干燥过程在材料内部或表面的可用水分中起重要作用，因此其评估具有重要意义。红外热成像（IRT）是一种非接触和非破坏性测试技术，可以应用于确定物体的表面温度。它通常用作诊断工具，使研究能够与建筑元素的热行为相关的研究以及识别异常和降级区域。虽然不太常见，但IRT也用于评估建筑部件的水分。在这项工作中，分析了IRT的适用性，以评估长期多雨天气后外墙的干燥过程。测试活动开始在下雨时期停止，阳光灿烂的日子开始。为了评估干燥过程，除了红外相机之外，还使用水分检测器来评估墙壁的水分含量。在连续六天进行测量，在没有下雨的情况下进行，在10:00，12:00,14：00,16：00和18:00。评估了两堵墙：一个面朝东南部，暴露于直接的太阳辐射，一个面向东北部，没有入射的太阳辐射。湿度探测器结果表明，墙壁沿着测试活动干涸，是墙壁面向东南的墙壁更加强烈的干燥过程。这主要是与墙壁暴露在较长时间内的直接太阳辐射的事实相关的事实，这使得干燥过程能够固定。讨论了两种方法获得的结果，并讨论了IRT在室外条件下评估干燥过程的机会和限制。

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