沥青混凝土是一种多层结构，通常由以下几个主要组成部分构成：

Asphalt concrete is a multi-layered structure typically composed of the following main components:

1、基层：基层通常是路面下的底部层，它支撑和分散交通载荷，确保路面的稳定性。基层通常由碎石或矿物颗粒组成。

1. Base layer: The base layer is usually the bottom layer under the road surface, which supports and disperses traffic loads, ensuring the stability of the road surface. The base layer is usually composed of crushed stones or mineral particles.

沥青混凝土密度

Asphalt concrete density

2、底基层：底基层是基层之上的一层，它有助于分散交通载荷，减轻路面的压力。底基层通常由更小的矿物颗粒组成。

2. Subbase layer: Subbase layer is a layer above the base layer, which helps to disperse traffic loads and reduce pressure on the road surface. The base layer is usually composed of smaller mineral particles.

3、沥青层：沥青层是沥青混凝土的顶部层，它提供了平坦、耐磨和抗滑的路面。这一层由沥青胶粘剂、骨料和填充剂混合而成。

3. Asphalt layer: The asphalt layer is the top layer of asphalt concrete, which provides a flat, wear-resistant, and anti-skid road surface. This layer is composed of a mixture of asphalt adhesive, aggregate, and filler.

4、表面层：表面层通常是沥青混凝土路面的最顶部一层，它提供了更好的抗滑性和平滑度。这一层通常由细石子、沙子和特殊的表面处理材料组成。

4. Surface layer: The surface layer is usually the topmost layer of asphalt concrete pavement, which provides better skid resistance and smoothness. This layer is usually composed of fine stones, sand, and special surface treatment materials.

沥青混凝土密度一般是多少

What is the general density of asphalt concrete

沥青混凝土的密度通常是由其组成部分的类型和配比来决定的。一般而言，沥青混凝土的密度在2.2克/立方厘米（g/cm?）到2.4克/立方厘米之间。这意味着每立方厘米的沥青混凝土材料重量约在2.2克到2.4克之间。

The density of asphalt concrete is usually determined by the types and proportions of its components. Generally speaking, the density of asphalt concrete is between 2.2 grams per cubic centimeter (g/cm?) and 2.4 grams per cubic centimeter. This means that the weight of asphalt concrete material per cubic centimeter is approximately between 2.2 grams and 2.4 grams.