| 术语 | 描述 |
|---|---|
| 表观密度 apparent density | expressed as the mass of the aggregate particles divided by the volume of the aggregate particles including impermeable (internal) voids but excluding permeable (surface) and inter-particle voids |
| 体积密度 bulk density | expressed as the mass of the aggregate particles divided by the volume of the aggregate particles including the impermeable (internal), and permeable (surface) voids, but excluding the inter-particle voids |
| 碎石基层 crushed stone base | granular layer (produced by crushing rock) immediately below the surfacing of a road pavement |
| 饱和面干状态 saturated surface-dry condition | condition at which the permeable (surface) voids of aggregate particles are just filled with moisture |
| 吸水率 water absorption | difference in mass between the saturated surface-dry condition and the oven-dry condition of a given volume of aggregate |
| 真空泵 能维持100 mm汞柱的低压 | 用于排除比重瓶内的空气。 |
| 比重瓶 容量500-1000 mL或50-100 mL | 用于测定样品和水的体积,容量需至少为样品体积的两倍。 |
| 电子天平 容量至少200g(精度0.01g)或2000g(精度0.1g) | 用于称量比重瓶、样品和容器的质量。 |
| 金属模具 锥形,顶口直径40mm±3mm,底口直径90mm±3mm,高75mm±3mm | 用于测定饱和面干状态的体积。 |
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