膨胀玻化微珠的显微结构及其吸湿性能研究  

Study on the Microstructure of Expanded and Vitrified Small Balls and Its Sorption Performance

作　　者：方萍[1] 吴懿[1] 龚光彩[1] 

机构地区：[1]湖南大学土木工程学院,湖南大学建筑结构安全与建筑节能教育部重点实验室,长沙410082

出　　处：《材料导报》2009年第10期112-114,共3页Materials Reports

基　　金：建设部2006年项目(06-K5-23);湖南省科技厅2005年重点项目(05GK3004)

摘　　要：膨胀珍珠岩因其高吸湿性而不宜用在气候潮湿地区的建筑物外保温工程中。以膨胀珍珠岩为参照,研究了旨在减少膨胀珍珠岩吸水吸湿性而开发的膨胀玻化微珠的微观结构和吸湿性能。研究结果表明,膨胀玻化微珠因其表层外壳易破碎而不完全呈闭孔状。膨胀玻化微珠与膨胀珍珠岩有相近的比表面积、孔容积及相似的等温吸湿曲线。但膨胀玻化微珠因其微孔数量略多于膨胀珍珠岩而呈现出略大的吸湿性和较快的吸湿速率。The expanded perlite particles are not suitable for applications in the building envelopes in humid areas because of their high water absorption properties. The microstructure and sorption properties are studied on the expanded and vitrified small balls which are developed to decrease the sorption properties of the expanded perlite particles. The results show that the expanded and vitrified small balls are not fully porous-closed because of their brittle shell. There are close surface areas and pore volume, as well as similar sorption curves between the expanded and vitrified small balls and the expanded perlite particles. But there is a little higher water sorption content and faster velocity of water sorption for the expanded and vitrified small balls.

关 键 词：膨胀玻化微珠 膨胀珍珠岩 微观结构 吸湿性 

分 类 号：TU551.34[建筑科学—建筑技术科学] TS102.2[轻工技术与工程—纺织工程]