Road asphalt pavement

Abstract

The invention discloses a road asphalt pavement, comprising a powdery fine sand roadbed layer, wherein a leveling course is paved on the powdery fine sand roadbed layer, a gravel base coarse is paved on the leveling course, an efficient fireproof rubber layer is arranged on the gravel base coarse and is connected with a heat insulation layer, a steel fiber self-compaction concrete layer is paved on the heat insulation layer, an asphalt surface layer is paved on the steel fiber self-compaction concrete layer, a skid resistant course is smeared on the asphalt surface layer, and an antifreezing and waterproof berm is arranged at each of two sides of the powdery fine sand roadbed. The antifreezing and waterproof berm is arranged at each of the two sides of the roadbed, so that the stability, water resistance and antifreezing property of the roadbed are enhanced; and the steel fiber concrete composite material is adopted, so that the tensile strength, the bending resistance, the impact resistance and fatigue resistance of concrete are significantly improved, the concrete has relatively good ductility, and the quality of the roadbed is ensured; and asphalt is modified by virtue of reasonable proportions, and the obtained asphalt has the advantages of relatively low temperature sensitivity, relatively good high-temperature and low-temperature properties, aging resistance, long service life, stripping resistance and the like.

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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