级配砂石和级配碎石主要区别在于其中的集料。

The main difference between graded sand and gravel and graded crushed stone lies in the aggregate used.

1、级配砂石的主要用途：

1. The main uses of graded sand and gravel are:

人工级配是配合比是砾石（20mm-40mm）：天然砂：水=9.11:4.97:3

Artificial grading is a mix ratio of gravel (20mm-40mm): natural sand: water=9.11:4.97:3

级配碎石垫层应密实稳定，其粒径级配范围满足下表：

The graded crushed stone cushion layer should be dense and stable, and its particle size grading range should meet the following table:

以上两种级配均为垫层级配。

The above two gradations are both cushion gradations.

种规定了所有颗粒直径均不能大于50mm，为了更好满足压实度，推荐选用种！另外为了防止冻胀和湿软，应注意控制小于0.5mm细料的含量和塑性指数。在中湿和潮湿路段，用做沥青路面的垫层时，应在级配中加石灰，细料可适当增加，加入的石灰剂量占细料含量的8%--12%.目的在于增加垫层强度和稳定性。

According to the regulations, the diameter of all particles cannot exceed 50mm. In order to better meet the compaction requirements, it is recommended to choose Zhong! In addition, to prevent frost heave and moisture softening, attention should be paid to controlling the content and plasticity index of fine materials less than 0.5mm. When used as a cushion layer for asphalt pavement in medium and humid road sections, lime should be added to the gradation, and the amount of fine material can be appropriately increased. The amount of lime added accounts for 8% -12% of the fine material content The purpose is to increase the strength and stability of the cushion layer.

级配砾石有时候用来做垫层叫做级配砂砾垫层，其级配砂砾要求颗粒尺寸在5--40mm之间，其中25--40mm含量不少于50%。

Graded gravel is sometimes used as a cushion layer called graded gravel cushion layer, and its graded gravel requires a particle size between 5-40mm, with 25-40mm accounting for no less than 50%.

2、级配碎石的主要用途：

2. The main uses of graded crushed stone are:

（1）级配型集料可以用做沥青路面和水泥混凝土路面的基层和底基层，也可用做路基改善层。在排水良好的前提下，级配型集料可在不同气候区用于不同交通等级的道路上。在潮湿多雨地区使用级配型集料特别有利。

(1) Graded aggregate can be used as the base and subbase of asphalt pavement and cement concrete pavement, as well as as as the subgrade improvement layer. Under the premise of good drainage, graded aggregates can be used on roads of different traffic levels in different climate zones. The use of graded aggregates is particularly advantageous in humid and rainy areas.

（2）级配型集料用做路面的不同层次或用于路面中的不同位置，取决于材料本身的特性、材料的质量、气候条件、交通组成和交通量及每个、每个地区的使用经验。

(2) Graded aggregate is used for different levels of pavement or at different locations in the pavement, depending on the characteristics of the material itself, the quality of the material, climatic conditions, traffic composition and volume, as well as the usage experience of each region.