Interlayer structure construction method of asphalt pavement

Abstract

The invention discloses an interlayer structure construction method of an asphalt pavement. The interlayer structure construction method includes the following steps of cleaning an under bearing layer of the pavement; sprinkling rubber asphalt; sprinkling rubbles; and rolling into the shape. The interlayer structure construction method of the asphalt pavement has the advantages of being high in bonding strength between layers, good in water tightness, excellent in anti-shearing performance, deferring reflection cracks, convenient to construct, low in comprehensive cost and the like. By adoption of the interlayer structure construction method of the asphalt pavement, construction work can be done without closing to traffic or closing to traffic for a short term, therefore, the interlayer structure construction method of the asphalt pavement can not only be suitable for a bonding layer between asphalt surfaces of newly-built roads, but also particularly suitable for repairing and maintaining projects for asphalt surfaces of urban roads.

Description

technical field [0001] The invention relates to the technical field of traffic survey, in particular to a construction method for an asphalt pavement interlayer structure. Background technique [0002] Asphalt pavement structure is the main pavement structure type of high-grade highways in my country, and generally consists of asphalt surface layer, base layer, subbase layer and cushion layer. The asphalt pavement of high-grade highways such as expressways, first-class highways, urban expressways, and trunk roads generally consists of three layers, which are divided into surface layer, middle layer and bottom layer, and are structures that directly bear the repeated action of vehicle loads and the influence of natural factors. layer. According to the change of pavement structure strength and load stress with depth, different asphalt mixture gradations are selected for the three-layer structure of asphalt pavement, so that the whole asphalt pavement has better road performan...

AI Technical Summary

Problems solved by technology

However, these two methods have certain defects. The first method requires the additional use of high-permeability modified emulsified asphalt, which increases the cost of materials and construction. In actual engineering, the penetration depth of viscous layer oil is limited and the bonding effect is not ideal. In some heavy-duty traffic sections, serious pavement damage often occurs prematurely; although the second method can improve the bonding effect by increasing the surface roughness, milling may cause structural damage to the underlying layer, affecting the quality of the underlying layer. structural strength, and manual cleaning is required after milling, resulting in a serious waste of manpower and material resources. At the same time, the construction efficiency of fine milling is not high, but the cost is high, which affects the overall cost of the project and construction efficiency

The principles of other methods are similar. The sticky layer oil has the construction process of emulsified asphalt demulsification, water evaporation, or diluent volatilization in diluted asphalt. Long construction period is a common problem of this kind of sticky layer oil.

However, the hot asphalt used in the interlayer bonding treatment in my country in the early stage, because it is difficult to control the amount during construction, the asphalt material cannot meet the use requirements in terms of cohesive force and temperature stability under high temperature conditions.

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