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根据《蒸压加气混凝土建筑应用技术规程》JGJ17-2008规定,不同干体积密度的蒸压加气混凝土,在同一相对湿度条件下体积平衡含水率为一定值3%,则其质量平衡含水率与干密度呈反比。而科学试验研究表明,不同干体积密度的蒸压加气混凝土,在同一相对湿度条件下的质量平衡含水率相等,而体积平衡含水率与干密度呈正比。因此,JGJ17-2008规定的蒸压加气混凝土的平衡含水率不合理,按此规定的蒸压加气混凝土的导热系数理论和设计计算值亦不合理,应予以修订。
According to “Autoclaved aerated concrete building application of technical regulations” JGJ17-2008 provides that autoclaved aerated concrete with different dry bulk density, under the same relative humidity conditions, the volumetric equilibrium moisture content of 3% of the value, the mass balance moisture content In inverse proportion to dry density. However, scientific experimental studies show that autoclaved aerated concrete with different dry bulk density has the same mass-averaged water content under the same relative humidity, while the volumetric equilibrium moisture content is proportional to dry density. Therefore, the autoclaved aerated concrete JGJ17-2008 provisions of the equilibrium moisture content unreasonable, according to the provisions of autoclaved aerated concrete thermal conductivity theory and design calculations are not reasonable and should be amended.