环境对外墙外保温系统失效影响的研究进展

Research Progress on the Failure Influence of Environmental External Thermal Insulation System

外墙外保温系统是建筑节能领域重要的技术措施之一。外墙外保温技术的推广和使用,使建筑外围结构的热损耗不断减小。经过多年的研究,外墙外保温技术迅速提高,推广应用更为广泛。但在实际使用时却存在开裂、脱落等诸多问题,造成该现象的原因很多,其中温度应力是造成外墙外保温系统产生破裂的重要因素。本文对近年来环境对外墙外保温系统失效影响的研究进行总结,阐述黏结层、保温层、抹面层在不同环境下材料的物理性能,结合冷热与干湿循环分析外墙外保温系统失效的原因,同时对外墙外保温系统中温度应力的研究趋势进行展望。

External wall thermal insulation system is one of the important technical measures in the field of building energy saving.With the popularization and use of external thermal insulation technology,the heat loss of the outer structure of the building is continuously reduced.After years of research,external thermal insulation technology has rapidly improved,and the promotion is more extensive.However,there are many problems such as cracking,falling off when practical use,which have many reasons for this phenomenon,and the temperature stress is an important fac⁃tor in which the outer insulation system produces cracks.This paper summarized the research on the influence of envi⁃ronment on the failure of external wall external insulation system in recent years,expounded the physical properties of materials in different environments,analyzed the failure reasons of external wall external insulation system com⁃bined with cold heat and dry wet cycle,and prospected the research trend of temperature stress in external wall exter⁃nal insulation system.