Timber is a natural material traditionally used in the building industry. In the last decades, developments in scientific research have made timber a high-tech building material. In the field of timber engineering, recent developments concerned advances in the study of adhesive joints and their applications in the field of structures. The growing interest in adhesive joints in timber structures is due to the advantages offered by adhesive technology over traditional mechanical joining techniques. In this paper, the effect of exposure of adhesive joints between timber adherends to high values of temperature and relative humidity is investigated. In particular, two different two-component (2K) epoxy adhesives (EPX1, EPX2) and one polyurethane (PU) in single-lap adhesive joints between mahogany and pine adherends have been used and compared. This research work investigates the possibility of realising new joints between timber adherends in innovative building components (e.g. windows and curtain walls). The results obtained from the experimental campaign showed that PU adhesive has lower mechanical performance than epoxy adhesives, regardless of the aging condition. On the other hand, the epoxy adhesives tested showed high performance and different mechanical behavior after artificial aging.

木材是传统上用于建筑业的天然材料。在过去的几十年中，科学研究的发展使木材成为高科技的建筑材料。在木材工程领域中，最近的发展涉及粘合接头的研究及其在结构领域中的应用方面的进展。人们对木结构胶粘接头的兴趣日益浓厚，这是由于胶粘技术相对于传统机械连接技术所具有的优势。本文研究了木材被粘物之间的粘合缝暴露于高温度和相对湿度的影响。特别是，在桃花心木和松木被粘物之间的单搭接缝中使用了两种不同的两组分（2K）环氧胶粘剂（EPX1，EPX2）和一种聚氨酯（PU）。这项研究工作调查了在创新的建筑部件（例如窗户和幕墙）中的木材被粘物之间实现新接合的可能性。从实验活动获得的结果表明，无论老化条件如何，PU胶粘剂的机械性能均低于环氧胶粘剂。另一方面，经过测试的环氧粘合剂在人工老化后表现出高性能和不同的机械性能。