Abstract Airtightness is considered an important factor on all levels of the building envelope, i.e. overall building envelope, on a component level and on a material level. Airtightness of the building envelope is a defining factor to achieve energy efficient and durable buildings, i.e. reduced risk of condensation and water infiltration through the building envelope, reduced risk of cold draughts and it improves the correct functioning of the HVAC-system. Over the past decades the amount of airtightness tests for newly built buildings in Belgium has significantly increased. However, the measured airtightness level of the tested buildings from 2006 to 2016 did not significantly change. This implies that there is still a lack of knowledge to achieve airtight building details, both on a design level and on the implementation of the building details. However, literature concerning airtightness of sealed building joints is very limited. In this study, the airtightness performance of different materials to seal building joints was experimentally assessed. In general, a good airtightness was achieved for all tested materials in case they were perfectly installed. However, the performance of the sealing materials was very sensitive to faulty workmanship and primarily depended on the quality of implementation, in particular for the tapes, silicone based materials and foam sealing strips. The performance of the liquid applied coating primarily depended on the characteristics of the materials and the application method was determining for the performance of the polyurethane foams.

中文翻译：

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密封建筑接缝气密性：人工老化前后性能对比

摘要 气密性在建筑围护结构的各个层面，即整体建筑围护结构，在构件层面和材料层面被认为是一个重要因素。建筑围护结构的气密性是实现节能和耐用建筑的决定性因素，即降低冷凝和水通过建筑围护结构渗入的风险，降低冷风的风险，并改善暖通空调系统的正常运行。在过去的几十年里，比利时新建建筑的气密性测试数量显着增加。然而，2006年至2016年被测建筑的气密性水平并没有显着变化。这意味着在设计层面和建筑细节的实施方面仍然缺乏实现密闭建筑细节的知识。然而，关于密封建筑接缝气密性的文献非常有限。在这项研究中，通过实验评估了不同材料密封建筑接缝的气密性能。一般而言，所有测试材料在完美安装的情况下都实现了良好的气密性。然而，密封材料的性能对工艺缺陷非常敏感，主要取决于实施质量，特别是胶带、硅基材料和泡沫密封条。液体涂层的性能主要取决于材料的特性，而应用方法决定了聚氨酯泡沫的性能。对密封建筑接缝的不同材料的气密性能进行了实验评估。一般而言，所有测试材料在完美安装的情况下都实现了良好的气密性。然而，密封材料的性能对工艺缺陷非常敏感，主要取决于实施质量，特别是胶带、硅基材料和泡沫密封条。液体涂层的性能主要取决于材料的特性，而应用方法决定了聚氨酯泡沫的性能。对密封建筑接缝的不同材料的气密性能进行了实验评估。一般而言，所有测试材料在完美安装的情况下都实现了良好的气密性。然而，密封材料的性能对工艺缺陷非常敏感，主要取决于实施质量，特别是胶带、硅基材料和泡沫密封条。液体涂层的性能主要取决于材料的特性，而应用方法决定了聚氨酯泡沫的性能。密封材料的性能对工艺缺陷非常敏感，主要取决于实施质量，尤其是胶带、硅基材料和泡沫密封条。液体涂层的性能主要取决于材料的特性，而应用方法决定了聚氨酯泡沫的性能。密封材料的性能对工艺缺陷非常敏感，主要取决于实施质量，尤其是胶带、硅基材料和泡沫密封条。液体涂层的性能主要取决于材料的特性，而应用方法决定了聚氨酯泡沫的性能。