road asphalt pavement

Abstract

The invention discloses a highway asphalt pavement, which comprises a powder fine sand road base, a leveling layer is laid on the powder fine sand road base, a crushed stone base is laid on the leveling layer, and a high-efficiency fireproof adhesive layer is arranged on the crushed stone base to connect Insulation layer, steel fiber self-compacting concrete layer is laid on the heat insulation layer, asphalt surface layer is laid on the steel fiber self-compacting concrete layer, anti-skid layer is applied on the asphalt surface layer, antifreeze and waterproof protection is provided on both sides of powder fine sand subgrade road. The present invention sets antifreeze and waterproof berms on both sides of the roadbed, which enhances the stability, water resistance and antifreeze of the roadbed; the steel fiber concrete composite material is used, which significantly improves the tensile, bending, impact and fatigue resistance of concrete Performance, and good ductility, to ensure the quality of the road surface, through a reasonable proportion, the asphalt is modified, the resulting asphalt has a lower temperature sensitivity, better high and low temperature performance, aging resistance, and service life Long, anti-stripping and other advantages.

Description

technical field [0001] The invention relates to the field of civil construction, in particular to a highway asphalt pavement. Background technique [0002] Commonly used concrete pavement has high rigidity. During the driving process of the vehicle, due to the pumping effect of the tire, there is a normal tensile stress at the interface between the waterproof layer and the bridge deck. It is possible to disengage and cause damage. At the same time, a large shear stress will be generated inside the layer, causing shear deformation of the uncertain failure surface, and relative displacement in the horizontal direction. When the water in the water freezes, the volume expands, and the uneven frost heave will cause the line to exceed the limit, the roadbed will be seriously deformed, and there will be a great safety hazard; at the same time, the freeze-thaw phenomenon in the alpine area is serious, and the water infiltration will cause the roadbed to break. Repeated freezing and...

AI Technical Summary

Problems solved by technology

However, the high subgrade has brought about the thickening of the melted interlayer under the subgrade, and the subsidence and deformation of the subgrade have increased, which has brought huge hidden dangers to the stability of the subgrade.

In order to solve the problem of waterproofing, SBS polymer modified asphalt waterproofing membrane is commonly used, but because the membrane is usually used, it is inevitable that the water layer will be separated from the concrete, and the technical effect of waterproofing cannot be achieved.

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