服役20年幕墙粘结及密封材料状况调查研究

Investigation on the Adhesive and Sealing Material of Curtain Wall in Service for 20 Years

近年来,由于幕墙年久失修、或者所用粘接及密封材料质量问题等多方面原因,粘接及密封材料失效导致幕墙损坏,甚至引发安全事故,引起了全社会对幕墙耐久性、安全性的关注。为了研究实际使用中的幕墙粘接及密封材料的耐久性,本文调研了国内部分代表性城市服役20年左右的幕墙工程,查看其使用的粘结及密封材料的状况以及出现的问题,并分析了问题产生的原因。结果表明:大部分幕墙粘接及密封材料在使用20年后,仍能保持比较良好的性能,但部分幕墙的粘接及密封材料出现了性能下降,建议要及时维护。幕墙粘接及密封材料在实际应用中出现的不良问题,主要原因有四个方面:设计不当、选材不当、施工不当和维护不当。采用优质的粘结及密封材料,合理设计,规范施工,维护保养得当,优质的粘结及密封材料是可以拥有20年甚至超过20年的使用寿命。

In recent years,due to the curtain wall disrepair,or the adhesive and sealing materials quality problems and other reasons,adhesive and sealing material failure lead to the curtain wall damage,and even cause safety accidents,which has aroused the concern of the whole society for durability and safety of curtain walls.In order to study the durability of adhesive and sealing materials actual used in curtain wall,we investigate some curtain wall works in domestic representative city which have been in service for about 20 years,look over the condition and problems of adhesive and sealing material,and analyze the causes of the problem.The results shows: Most of the curtain wall adhesive and sealing materials in service for 20 years are still able to maintain a relatively good performance.However,some adhesive and sealing materials' performance has declined,which is recommended to be timely maintenance.For the problems arise in the actual application of adhesive and sealing materials,there are four main reasons: improper design,improper selection,improper construction and improper maintenance.With the use of high-quality adhesive and sealing materials,reasonable design,standard construction,properly maintenance,high quality adhesive and sealing material can have 20 years or even more than 20 years of service life.