典型建筑材料蒸汽渗透系数测定和实验方法优化研究
Determination of vapor permeability coefficients and optimization of experimental methods for typical building materials
罗戴维 1陈宇航 2吴杰3
作者信息
- 1. 苏州科技大学 建筑与城市规划学院,江苏 苏州 215011;江苏省建筑碳中和技术工程研究中心,江苏 苏州 215011
- 2. 苏州科技大学 建筑与城市规划学院,江苏 苏州 215011
- 3. 苏州科技大学 基建处,江苏 苏州 215009
- 折叠
摘要
建筑材料的蒸汽渗透系数反映了水蒸气在特定环境下穿透该材料的能力,是研究墙体保温和防水性能的重要参数.然而,蒸汽渗透系数会随着环境湿度的变化而变化,在热工计算中将其视为常数是不合理的.本研究基于国际标准ISO 12572的干湿杯法,改进实验方法,测定了四种典型建筑材料的蒸汽渗透系数,分析误差并提出四种密封优化方法,最终将材料的蒸汽渗透系数表示为材料含湿量的单值函数.结果表明,密封方法优化后能够准确测量材料的蒸汽渗透系数,并可推广应用于各类建筑材料.
Abstract
The vapor permeability coefficient of building materials indicates the ability of water vapor to penetrate the material under specific environmental conditions,making it an important parameter for assessing the thermal in-sulation and waterproofing performance of walls.However,this coefficient varies with changes in environmental hu-midity,thus it is unreasonable to treat it as a constant in thermal calculations.This study,based on the dry-wet cup method outlined in the international standard ISO 12572,improves the experimental approach to measure the vapor permeability coefficients of four typical building materials,and also analyzes the errors and proposes four sealing op-timization methods,ultimately expressing the vapor permeability coefficient as a single-valued function of moisture content.The results show that the optimized sealing methods can accurately measure the vapor permeability coeffi-cients of these materials and can be applied to various types of building materials.
关键词
建筑材料/蒸汽渗透系数/干湿杯法/密封方法Key words
building materials/vapor permeability coefficient/wet and dry cup method/sealing method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据