19/30373025 DC
BS ISO 20290-1 混凝土用骨料 機械和物理性能的測試方法 第1部分：堆積密度、顆粒密度、顆粒體積質量和吸水率的測定
BS ISO 20290-1. Aggregates for concrete. Test methods for mechanical and physical properties. Part 1. Determination of bulk density, particle density, particle mass-per-volume and water absorption