Heavy-load type durable asphalt composite structure

Abstract

The invention discloses a heavy-load type durable asphalt composite structure applicable to a 'changing white to black' project. The layered composite structure is arranged on an original pavement layer and comprises an upper surface layer, a second bonding layer, an intermediate layer, a first bonding layer, a lower surface layer and a stress absorption layer in sequence from top to bottom; the stress absorption layer is arranged on the upper surface of the original pavement layer. According to the heavy-load type durable asphalt composite structure, the upper surface layer made of rubber asphalt SMA13, the intermediate layer and the lower surface layer made of high-modulus EME are all capable of bear load well, and excellent track resistance is achieved; meanwhile, compared with a common asphalt mixture, the position of the upper surface layer, the position of the intermediate layer and the position of the lower surface layer are all high in stiffness modulus which is closer to the modulus of a cement concrete pavement, so that the entire deformation coordination capacity is unified, and it is helpful to prolong the entire structural service life of the pavement.

Description

technical field [0001] The invention relates to a road engineering reconstruction structure, in particular to a heavy-duty durable asphalt composite structure. Background technique [0002] As an advanced pavement structure, cement concrete pavement has high strength, stability, durability, flatness and roughness, and less maintenance and repair costs. Since the 1980s, it has been widely used in road construction of various grades. However, with the increase of the opening time, under the joint action of traffic load and environmental factors, the cement concrete pavement has cracks, wrong platform, potholes, mud pumping and other pavement damage, and the service performance is significantly reduced. In order to ensure good traffic quality, the existing cement concrete pavement was transformed and gradually replaced with asphalt concrete pavement structure, forming a composite pavement structure of PCC+HMA. Although the defects of the original hydraulic concrete pavement c...

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Problems solved by technology

Although it can overcome the defects of the original hydraulic concrete pavement, the reconstructed pavement structure is not uniform in force and deformation due to the inconsistency of the connection between the upper and lower structures, and the anti-heavy load capacity is poor

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