文章基本信息

标题：The Effectiveness of Nano Materials and Nano-Modified Polymers for Preservation of Historic Brick Masonry in Rashid, Egypt
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作者：S. Hemeda ; M. Khalil ; A. Shoeb 等
期刊名称：International Journal of Conservation Science
印刷版ISSN：2067-533X
电子版ISSN：2067-8223
出版年度：2018
卷号：9
期号：4
页码：821-834
出版社：Alexandru Ioan Cuza University of Iasi
摘要：The Rosetta, (Rashid City) of Egypt is considered the second-largest open-air museum after Cairo city. Historic brick masonries are exposed to aggressive environmental and geotechnical conditions especially the ground water rise factor. The building materials in the historic buildings in this city are suffered from many factors and forces of damage and instability, which caused the structural and out of plane deficiencies. Al-Mahalli mosque is considered the largest central mosque in the city is threatened of damage and structural problems as a result of mechanical, physiochemical and biological deterioration factors. From the mosque survey we found that the ground water, salt weathering, rain as well as earthquake, vibration levels, pollution and human damage factors are the most important ravages that threaten the ancient buildings in rational overall domestic and mosque in particular. The assessment of the current state and the development of appropriate restoration strategy were performed including the analytical study of the main construction materials. The pilot study was performed on samples of fired bricks using some traditional protective and consolidating materials as well as some nano materials to choose the best one in the treatment and maintenance of historic fired brick. The evaluation methodology is performed using a set of stress analysis of the treated specimen processed and compared with non-treated or standard samples that were not exposed to the processors, as well as appoint resistant of red bricks using the ultrasonic velocity test PUNDT also the physical properties of the samples including the micro porosity and finally using the scanning electron microscopy (SEM) and polarizing light microscopy (PLM) to investigate the treated samples. The results proved the superiority of the samples that have been strengthened by nano silica concentration of 1.5% and nano titanium concentration of 1.5% with Wacker Bs15 concentration in 20% with water, which was given the code (J).
关键词：Rashid; Mechanical properties; Physical properties; Red bricks; Nano materials