What does highway hardening mean?

Hardened roads are also called asphalt roads.

Hardened pavement (asphalt pavement) refers to mineral pavement mixed with asphalt pavement materials. Asphalt material improves the ability of paving particles to resist the damage of traffic and natural factors to the pavement, making the pavement shaped, less dust, impermeable and durable.

Extended data:

Hardened pavement structure:

The structural layer of asphalt pavement consists of surface layer, base layer, base layer and cushion layer. The asphalt pavement structure layer itself belongs to the category of flexible pavement, but its base can be made of rigid cement concrete or semi-rigid hydraulic materials besides flexible materials.

The surface layer is a structural layer that directly bears the repeated action of wheel load and the influence of natural factors. It can be composed of 1~3 layers. The surface layer should be provided with a non-slip, wear-resistant, dense and stable asphalt layer according to the use requirements; According to the highway grade, asphalt layer thickness and climate conditions, the middle and lower layers are selected.

The base course is a layer which is set under the surface course, disperses the repeated action of wheel load on the subbase course, cushion course and soil foundation together with the surface course, and plays a major bearing role. The strength index of grass-roots materials should have higher requirements. According to the needs of highway grade or traffic volume, the grass-roots level can be set up with one or two floors. When the base is thick and needs to be constructed in two layers, it can be called upper base and lower base respectively.

The bottom plate is arranged below the bottom plate and bears repeated wheel loads together with the surface layer and the bottom plate, thus playing the role of secondary support. The strength index of the base material is slightly lower than that of the base material.

According to the highway grade or traffic volume, the base can have one or two floors. When thick subbase needs to be constructed in two layers, it can be called upper subbase and lower subbase respectively. Cushion is the structural layer between the base and the foundation, which plays the role of drainage, water insulation, antifreeze and pollution prevention.

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