Home / Standards / GB/T 9966.3-2020 GB/T 9966.3-2020 Active Test methods for natural stone—Part 3:Determination of water absorption,bulk density,true density and true porosity 天然石材试验方法 第3部分：吸水率、体积密度、真密度、真气孔率试验 Standard Type GBT ICS 91.100.15 CCS Q21 Status 现行 Issue Date 2020-03-06 Implementation 2021-02-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A