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-layer 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.

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，减轻路面压力。底基层通常由更小的矿物颗粒组成。

2. Subbase: Subbase is a layer above the base layer, which helps to disperse traffic loads and reduce road pressure. 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 skid resistant road surface. This layer is composed of a mixture of asphalt adhesive, aggregates, and fillers.

4、表面层：表面层通常是沥青混凝土路面的顶部一层，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 top 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 type and proportion 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.

密度的具体数值可以受到多种因素的影响，包括使用的骨料类型、沥青胶粘剂的质量、温度和压实方法等。不同类型的沥青混凝土用于不同的工程项目，密度的要求也可能有所不同。例如，高密度的沥青混凝土通常用于高速公路，以提供更大的耐用性和承载能力。

The specific value of density can be influenced by various factors, including the type of aggregate used, the quality of asphalt adhesive, temperature, and compaction method. Different types of asphalt concrete may have different density requirements for different engineering projects. For example, high-density asphalt concrete is commonly used on highways to provide greater durability and bearing capacity.

密度的确切数值通常由工程规范和设计要求确定，以确保所建道路或其他结构的安全性和性能。密度的控制和测试是施工过程中的重要步骤，以确保沥青混凝土的质量和一致性。

The exact value of density is usually determined by engineering specifications and design requirements to ensure the safety and performance of the constructed road or other structure. Density control and testing are important steps in the construction process to ensure the quality and consistency of asphalt concrete.

总之，沥青混凝土是一种常见的建筑材料，用于道路和交通基础设施的建设。它的密度一般在2.2克/立方厘米到2.4克/立方厘米之间，具体数值取决于多种因素，包括材料类型和工程要求。密度的控制对于确保道路和结构的质量至关重要。

In summary, asphalt concrete is a common building material used in the construction of roads and transportation infrastructure. Its density is generally between 2.2 grams per cubic centimeter and 2.4 grams per cubic centimeter, and the specific value depends on various factors, including material type and engineering requirements. Density control is crucial for ensuring the quality of roads and structures.

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