建筑墙体材料湿扩散率的测量

Experimental measurement on the moisture diffusion coefficient of wall materials

建筑墙体材料的湿扩散率表示水蒸气在该材料中的迁移能力,是研究墙体材料湿迁移所必需但相当匮乏的重要参数。在比较分析国内外有关湿迁移试验研究的基础上,设计了利用脉冲电导法获取建筑材料等温湿扩散率的试验方案,并对南京市普遍使用的多孔砖的湿扩散率进行了测试。

The moisture diffusion coefficient of wall materials represents the migration ability of the moisture in building enclosed structures and it is a rather scanty but important parameter which is essential to the investigation of moisture migration in wall materials. This article,based on the comparison and analysis of both domestic and abroad experimental investigation on mois- ture migration,proposes an experimental approach which the pulse-conductance method is used to determine the isothermal moisture diffusion coefficient of wall materials. Besides,the moisture diffusion coefficients of the porous bricks in common use in Nanjing area are determined experimentally.