Durability and Integrity of Marble Cladding for High-Rise Structures

大理石--一种非传统的高层建筑外墙装饰材料 结构，主要被视为设计问题， 建筑师 近年来，在切割方面的改进 工艺允许覆层面板的厚度 明显下降。 这导致了一个戏剧性的增加， 使用这种形式的包层。 这也导致了最近的国家- 大理石覆面在建筑物上的广泛问题， 超过二十岁。 大理石的观察问题 包层包括材料的严重和永久弯曲， 在建筑物完工后不久， 包层的所有锚固件中的一些失效， 建设 除了灾难性的经济后果， 建筑物业主和大理石及幕墙行业， 高层建筑存在潜在的生命危险 未来可能会危险地增加的建筑。 专家们对这一问题的原因存在争议。 永久鞠躬和约束的效果提供的 锚地。 这项研究将调查所谓的原因， 永久变形，厚度方向温差 和水分。 研究结果将包括 建筑规范规范的建议 大理石覆层可靠性问题的工程解决方案， 以及制定ASTM标准， E6.55关于建筑外墙系统的性能。

Marble, a nontraditional cladding material for high-rise structures, has been treated primarily as a design issue by architects. During recent years, improvements in the cutting process have allowed the thickness of the cladding panels to decrease markedly. This has led to a dramatic increase in the use of this form of cladding. It has also led to recent nation- wide problems with marble cladding on buildings that are no more than twenty years old. The observed problems of the marble cladding include severe and permanent bowing of the material that starts soon after the buildings are completed, and the eventual failure of some of all anchorages of the cladding to the building. In addition to disastrous economic consequences for the building owners and the marble and curtain wall industries, there are potential risks to life associated with high-rise construction that may be dangerously increased in the future. There is a controversy among experts about the cause of the permanent bowing and the effect of the restraints provided by the anchorages. This research will investigate the alleged causes of permanent deformation, thru-thickness temperature differentials and moisture. The results of the research will include recommendations for building code specifications for an engineered solution to the marble cladding reliability problem, as well as the development of an ASTM Standard for Subcommittee E6.55 on the Performance of Exterior Building Wall Systems.