19/30373025 DC
BS ISO 20290-1 混凝土用骨料 机械和物理性能的测试方法 第1部分:堆积密度、颗粒密度、颗粒体积质量和吸水率的测定
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