What Are Asphalt Pavers?

Asphalt mixture paver (asphalt payer) refers to a special machine that spreads asphalt mixture evenly and evenly according to specified requirements. According to different walking devices, it is divided into two types of track type and tire type. Except for the different walking parts, the structure and technical performance of the two are roughly the same.

It is mainly composed of hopper, chain conveyor, screw conveyor, vibrator, spreader plate, walking device and engine. In addition, in order to ensure that the road reaches the required elevation, an automatic leveling device is generally attached. It has the advantages of high efficiency, fast speed, best quality, reducing labor intensity and ensuring construction safety, etc. ^[1]

Asphalt mix base refers to the place where asphalt mix is produced and supplied. There are usually two types of stationary mixing plants and temporary mixing stations. Large fixed mixing plants are usually equipped in fixed mixing plants, and are equipped with facilities such as asphalt workshop, mineral processing workshop, power system, maintenance workshop, laboratory and warehouse; temporary mixing stations are mostly mobile Mixing machinery is usually set along the construction route and migrates as the construction progresses.

Asphalt stabilized material (stabilixed material with bitu-men) refers to a mixture of asphalt and loose soil, gravel or other aggregates. After paving and rolling, this mixture can be used as the base or bottom layer of the road surface. For the convenience of production, the asphalt in the asphalt stabilization material is mostly liquid asphalt or emulsified asphalt. The stabilization of asphalt mainly comes from two aspects: the cohesion of asphalt and the interaction between asphalt and the surface of mineral particles. The cohesive force makes the loose mineral material become a whole interaction with a certain strength. In addition to increasing the viscosity of the asphalt, it also imparts water permeability to the surface of the mineral material ^[1]

Surface interaction mainly refers to adsorption, that is, physical adsorption and chemisorption. Physical adsorption can increase the viscosity of the asphalt and change the arrangement of the surface-active substance molecules in the asphalt, so that its polar groups are oriented on the surface of the mineral particles and improve the hydrophobicity of the mineral; chemical adsorption will generate water-insoluble salts and form The strong chemical chain makes the bitumen film more firmly cover the particle surface.