建筑粘土制品的湿膨胀

作者通过对国际上的一些有关研究文献的综合分析后,提出了建筑粘土制品湿膨胀的危害性,特别是对上釉的墙地砖瓦上釉屋面瓦;综合阐述了引起建筑粘土制品湿膨胀的机理;介绍了湿膨胀的研究方法及研究实例;提出了在生产建筑粘土制品的原材料中要适当控制可引起湿膨胀物质的含量;”在选择生产外墙装饰砖、上釉屋面瓦的原料上,要谨慎从事,亦建议在外墙装饰砖(或清水墙砖)、上釉屋面瓦、快速烧成的墙地砖的质量检验中增设湿膨胀值的指标.

According to the synthetical analysis based on international research documents, the article points out the harmfulness of moisture expansion to structural clay products, especially to glazed wall tile and roofing tile; Also gives a description of the mechanism causing moisture expansion of structural clay products;Introduces the ways and some examples for studying moisture expansion; Shows the necessity of controlling the component content caused moisture expansion in raw materials to produce structural clay products; It should be cautious in choosing the raw materials to produce facing brick, external wall tile and glazed roofing tile. Finally gives a advice to test its moisture expansion value as a quality index of facing brick, glazed roof ing tile and fast - fired floor and wall tile.