Full-thickness asphalt pavement structure with steel wire mesh reinforced asphalt concrete as base layer

Abstract

The invention relates to a full-thickness asphalt pavement structure taking steel wire mesh reinforced asphalt concrete as a base layer, and the pavement structure sequentially comprises a high-rut-resistance asphalt concrete surface layer, a high-rut-resistance asphalt concrete surface layer and a high-rut-resistance asphalt concrete surface layer from top to bottom, the thickness of the high-modulus asphalt concrete bonding layer is 6-15 cm; the thickness of the high-modulus asphalt concrete base layer is 13-22 cm; in the steel wire mesh layer, the diameter of steel wires of a steel wire mesh is 0.8-2.0 mm, and the hole size of the steel wire mesh is between 20 mm * 20 mm and 80 mm * 80 mm; the thickness of the slurry seal layer is 6-10 mm; and the steel wire mesh needs to be subjected to tackifying and roughness increasing treatment. The steel wire mesh is arranged on the slurry seal and located on the lower portion of the pavement structure, the direction of steel wires is consistent with the stress direction of the overlay, the advantage of high tensile strength of steel wire materials can be fully played, fine steel wires are selected, good bond stress can be formed between the asphalt mixture and the steel wires, interlayer defect gaps are reduced, and the strength of the pavement structure is improved.

Description

technical field [0001] The invention relates to the field of asphalt pavement, in particular to a composite thin full-thickness and long-life asphalt pavement containing steel mesh reinforcement layers. Background technique [0002] Road transportation has become the main mode of freight transportation in my country, the electric vehicle industry is booming, and the trend of road transportation with heavy loads and large traffic volumes is gradually obvious, which puts forward higher requirements for the performance indicators of pavement structures. [0003] Full-thickness asphalt pavement means that the asphalt surface layer is directly laid on the treated subgrade soil. This type of pavement basically eliminates the common pavement structural diseases such as reflection cracks (bottom-up), fatigue damage and water damage. , The functional diseases of the pavement appear in the upper part of the pavement. During maintenance, only the surface layer needs to be repaired. The...

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Problems solved by technology

[0007] In summary, the existing long-life asphalt pavement structure and the application of asphalt pavement with steel mesh structure have the following problems: First, the main structure of the existing long-life asphalt pavement has high requirements for durability (fatigue resistance), and the traditional pavement design ideas The total thickness of the pavement structure increases significantly, and the initial investment in the project construction is large, which increases the difficulty of financing for the investment department; the asphalt pavement with steel mesh structure has been applied, mainly to install the steel mesh on the upper structure of the asphalt pavement, and pay more attention to the local impact of the steel mesh The effectiveness of reinforcement and crack resistance to limit the width of cracks (anti-temperature shrinkage cracks and reflection cracks); the steel wire mesh used is also mainly double-twisted steel wire mesh, with large mesh, thick steel wire diameter, and large distribution spacing, which is closely related to the structural performance of the pavement. Mismatch of needs

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