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返潮现象主要发生在房屋的底层地面。一般有两种原因:一是温度较高的潮湿空气(相对湿度在90%以上)遇到温度较低而又光滑不吸水的地面时,易在地面表面产生凝结水(一般温差在2摄氏度左右时即会产生)。这种情况多数发生在黄梅天季节,雨水多、气温高、湿度大。一旦气候转睛干燥,返潮现象即可消除。二是地面垫层下地基土壤中的水通过毛细管作用上升,以及汽态水向上渗透,使地面材料潮湿,并随之恶化整个房间的湿度情况。这种情况往往常年发生,难以处理。防潮地面主要应针对这一
The phenomenon of flooding mainly occurs on the ground floor of houses. Generally there are two reasons: First, when the humid air with high temperature (above 90% relative humidity) meets the ground with low temperature and no water absorption, it is easy to produce condensed water on the ground surface (general temperature difference is about 2 degrees Celsius). It will happen.) Most of this happened in the Huangmeitian season, with high rainfall, high temperatures, and high humidity. Once the climate turns dry, the phenomenon of flooding can be eliminated. Second, the water in the ground soil under the ground cushion rises through the capillary action, and the vaporous water infiltrates upwards, making the ground material wet, and then worsening the humidity in the entire room. This situation often occurs year-round and is difficult to handle. Moisture-proof ground should mainly aim at this