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Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method

A technology of concrete structure and rubber asphalt, which is applied in the direction of roads, roads, on-site paved cohesive pavements, etc., can solve the problems such as the effect is not outstanding, and achieve the effect of suppressing reflection cracks and dissipating concentrated stress

Active Publication Date: 2012-10-17
SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fact that there are many reasons for cracks on the actual pavement, the above solutions can only solve a certain aspect of crack resistance. Therefore, after engineering application, the effect of suppressing reflective cracks is not outstanding, and reflective cracks often appear earlier than expected.

Method used

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  • Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method
  • Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: First, stabilize the old cement slabs, then paste SBS self-adhesive anti-cracking stickers on the junction of adjacent cement slabs, and then spread 0.8mm-1.0mm modified emulsified asphalt sticky layer oil to form anti-cracking Adhesive course; then pave SDG-20 asphalt mixture with a paving thickness of 6cm to form the lower layer; finally pave rubber asphalt mixture with a gradation of SMA-13 ​​and pave with a thickness of 4cm to form the upper layer.

Embodiment 2

[0032] Embodiment 2: First, paste SBS self-adhesive anti-cracking paste at the junction of adjacent old cement plates, and then spread 0.8mm-1.0mm modified emulsified asphalt adhesive layer oil to form an anti-cracking adhesive layer; then pave SDG -13 asphalt mixture, the paving thickness is 4cm to form the lower layer; finally, the rubber asphalt mixture with a gradation of SMA-10 is paved, and the paving thickness is 3cm to form the upper layer.

Embodiment 3

[0033] Embodiment 3: First, paste SBS self-adhesive anti-cracking paste at the junction of adjacent old cement plates, and then spread 0.8mm-1.0mm modified emulsified asphalt adhesive layer oil to form an anti-cracking adhesive layer; then pave SDG -16 asphalt mixture, the paving thickness is 5.5cm to form the lower layer; finally, the rubber asphalt mixture with a gradation of SMA-13 ​​is paved, and the paving thickness is 5cm to form the upper layer.

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Abstract

The invention discloses a double-layer rubber asphalt concrete structure for inhibiting reflection cracks of a pavement, from the bottom up comprising a treated old cement concrete pavement, an anti-cracking tack coat, a lower surface adopting a special modified asphalt mixture, and an upper surface adopting a rubber asphalt mixture. The invention simultaneously discloses a pavement method of the double-layer rubber asphalt concrete structure, comprising the following steps: (a) firstly pasting an anti-cracking belt on the junction of adjacent cement boards, and then spraying modified emulsified asphalt tack coat oil with the thickness of 0.8-1.0 mm to form the anti-cracking tack coat; (b) then paving the special modified asphalt mixture with the paving thickness of 4-8 cm to form the lower surface; and (c) finally paving the rubber asphalt mixture to form the upper surface. According to the invention, the generation and extension of the reflection cracks can be effectively inhibited, and the service life and service condition of the pavement structure can be improved.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a double-layer rubber asphalt concrete structure and a paving method for suppressing reflective cracks (cracks that are easily generated after asphalt surface layers are directly paved on a cement road surface). Background technique [0002] At present, there are two main methods for transforming cement pavement into asphalt pavement: one is crushing, breaking the cement concrete pavement into tightly bonded concrete blocks with a surface of less than 8 cm and a bottom of less than 40 cm, and internally embedded concrete blocks. The asphalt concrete layer is added, and the rubble technology does not have the problem of reflection cracks. However, the disadvantage of this method is that there are more stone crushing processes, which increase the cost, and the noise caused by the stone crushing process seriously affects the surrounding environment, and the unde...

Claims

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Application Information

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IPC IPC(8): E01C7/32
Inventor 徐韵淳闫国杰赫振华徐斌李交胡睿张毅刘钢张建平马利志
Owner SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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