HOW TO CLASSIFY AGGREGATES ACCORDING TO SIZE?

根据大小，聚集体被归类为：

• Fine Aggregate
• 粗骨料
• 一切都在汇总

Fine Aggregate

It is the aggregate most of which passes 4.75 mm IS sieve and contains only so much coarser as is permitted by specification. According to source fine aggregate may be described as:

• 自然沙子- 它是岩石自然崩解产生的骨料，它已被溪流或冰川机构沉积
• 碎石沙子- 它是通过破碎硬石制作的细骨料。
• Crushed Gravel Sand- 它是通过破碎天然砾石产生的细骨料。

根据尺寸，细骨料可以描述为粗砂，中等沙子和细砂。根据其分级为分级区-1至等级区4的分级，规范将细骨料分类为四种类型。从分级区-1到分级区4，四个分级区域变得逐渐变得更加较高。90％至100％的细骨料通过4.75 mm是筛子，0至15％通过150微米，取决于其分级区。

粗骨料

It is the aggregate most of which is retained on 4.75 mm IS sieve and contains only so much finer material as is permitted by specification. According to source, coarse aggregate may be described as:

• 未填充的砾石或石头- 它来自岩石的自然解体结果
• 碎石或石头- 它是粉碎砾石或坚硬的石头。
• Partially Crushed Gravel or Stone- 它是上述两个聚集体混合的产物。

根据粗粗骨料被描述为其标称尺寸的渐变聚集体，即40mm，20mm，16mm和12.5mm等。例如，标称尺寸20mm的梯度聚集体是指大多数通过20mm的聚集体。

具有主要属于单个筛子尺寸的颗粒尺寸的粗骨料称为单尺寸聚集体。例如，例如20mm单尺寸的聚集体平均值，其中大多数通过20mm是筛子的，其主要部分保持在10mm上是筛子。

一切都在汇总

它是由细骨料和粗骨料组成的聚集体。According to size All-in-aggregate is described as all-in-aggregates of its nominal size, i.e. 40mm, 20mm etc. For example, all in aggregate of nominal size of 20mm means an aggregate most of which passes through 20 mm IS sieve and contains fine aggregates also.

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