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Condensation Problems in Precast Concrete Cladding Systems in Cold Climates

机译：寒冷气候下预制混凝土覆层系统中的冷凝问题

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摘要

The use of precast concrete panels as a cladding material can provide an economical and attractive method to enclose contemporary buildings. In cold climates, improper detailing or inappropriate construction of precast clad walls can result in widespread water problems due to condensation forming within the wall construction. Condensation may form at the interior of the wall assembly due to inadequate protection against air flow through the wall, such as exfiltration of warm, moist indoor air, or by infiltration of cold outdoor air reaching the interior wall components. The condensation within the wall assembly can also be caused by water vapor diffusion into the wall from the building interior. In addition, inadequate separation and/or insulation between precast panels and adjacent cladding components, such as windows, curtain wall, or metal framing components, can result in surface condensation on these wall elements. The moisture from condensation can cause extensive damage to finish materials, including insulation and gypsum wallboard; can result in corrosion and deterioration of metal components, such as structural connections and metal wall framing; and may result in mold and mildew.
机译：预制混凝土板作为覆盖材料的使用可以提供一种经济且有吸引力的方法来封闭当代建筑。在寒冷的气候下，预制复合墙的细节设计不当或施工不当，会由于墙体结构内形成冷凝水而导致广泛的水问题。由于对穿过墙壁的空气流的保护不足，例如温暖潮湿的室内空气的泄漏，或者进入室内壁部件的冷室外空气的渗透，可能会在墙壁组件的内部形成冷凝。墙组件内的冷凝也可能是由于水蒸气从建筑物内部扩散到墙中引起的。另外，预制板与相邻的覆层组件（例如窗户，幕墙或金属框架组件）之间的分隔和/或绝缘不足会导致这些壁组件上的表面凝结。冷凝产生的水分会严重破坏饰面材料，包括绝缘材料和石膏墙板；会导致金属部件的腐蚀和劣化，例如结构连接和金属墙框架；并可能导致发霉。

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