早期建筑的岩棉热工性能检测数理统计分析

Mathematical statistics analysis on thermal performance test of early rock wool

依托兰州20世纪70年代建造、90年代节能改造的某4层砖混结构居民楼,对第一代沉降法生产的早期岩棉进行了取样和热工性能测试,将导热系数和体积密度检测数据进行了数理统计,发现在使用20余年后,早期岩棉的导热系数与现在生产的岩棉相差不大,体积密度略低,说明试验建筑使用的岩棉耐久性较好。另外,镀锌钢丝网通过锚栓与基层墙体连接,对岩棉的保护起到了至关重要的作用。根据数理统计分析结果,提出岩棉外墙外保温体系耐久性可达到与建筑同寿命。

Based on a building of four-storied brick-concrete structure built in 1970s and energy saving reconstruction in 1990s,we took samples to test the early rock wool produced by first generation sedimentation method,and made the mathematical statistics of heat conductivity coefficient and volume-weight detection inspection data. Then we found the heat conductivity coefficient of rock wool used more than 20 years are similar to the rock wool produced at present. But the bulk density is less. The conclusion indicates the durability of rock wool used in the test building is good. Moreover,galvanized steel wire netting was connected to wall by anchor bolt. This played an important role for rock wool protection. According to the analysis result,this paper put forwards the conclusion that the endurance quality of wall exterior insulation systems can reach the same lifetime of architecture.