Limit ultrathin asphalt pavement

A technology of asphalt pavement and asphalt surface layer, which is applied to roads, roads, on-site coagulation pavement, etc. It can solve the problems of expensive asphalt materials, high maintenance costs, and easy rutting, and achieve the reduction of temperature gradient cracks on the road surface, Eliminate bending fatigue damage and reduce construction costs

Active Publication Date: 2012-07-11
张靖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the thickness of asphalt pavement at home and abroad is 70mm-400mm, because the asphalt pavement is thick, it is easy to rut; because the asphalt pavement is thick, it is not easy to be damaged, so the bonding layer is ignored, so bending and pulling often occur Fatigue failure; sometimes temperature gradient cracks
In particular, rutting disease is a major technical problem that has not been solved for high-grade highways; asphalt materials are expensive, construction costs are high, and maintenance costs are high
At present, there is no limit ultra-thin asphalt pavement in the world

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0012] In this embodiment, the soil base, rigid or semi-rigid base, and bonded oil layer are the same as those of the prior art (omitted).

[0013] Calculated using the finite element method, the results show that the rutting depth of the asphalt pavement increases with the thickness of the asphalt pavement, as shown in Table 1:

[0014] Table 1 Statistics of rutting depth with different surface thicknesses under 3.75 million traffic loads

[0015] Surface thickness (mm) Displacement in wheel (mm) Wheel side displacement (mm) Rutting depth (mm) 3 -0.12 0.05 0.16 5 -0.13 0.08 0.27 8 -0.31 0.13 0.44 10 -0.38 0.16 0.55 30 -1.15 0.49 1.64 50 -1.92 0.82 2.74 100 -3.84 1.63 5.47 150 -7.50 2.21 9.71 200 -10.92 2.64 13.56 250 -14.41 2.96 17.37 300 -17.52 3.23 20.75

[0016] The test results of the experimental road show that the horizontal plastic deformation of the upper and lower sides of...

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Abstract

The invention discloses a limit ultrathin asphalt pavement, and relates to the technical field of asphalt pavement construction. The asphalt pavement comprises an asphalt surface layer, a bonding oil layer, a rigid or semi-rigid base layer and a soil matrix from top to bottom, and is characterized in that: the thickness of the asphalt surface layer is 3 to 50mm; and bonding oil used in the bonding oil layer is AH70# or AH90# asphalt or styrene-butadiene-styrene (SBS) modified asphalt or sulfur modified asphalt. The pavement has the advantages that: flexural fatigue failure and rutting diseases are eliminated, the temperature crack diseases of the asphalt surface layer are reduced, building cost and maintenance cost are low, and the like.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement construction, in particular to an extreme ultra-thin asphalt pavement. Background technique [0002] At present, the thickness of asphalt pavement at home and abroad is 70mm-400mm, because the asphalt pavement is thick, it is easy to rut; because the asphalt pavement is thick, it is not easy to be damaged, so the bonding layer is ignored, so bending and pulling often occur Fatigue failure; sometimes temperature gradient cracks appear. In particular, rutting disease is a major technical problem that has not been solved for high-grade highways; asphalt materials are expensive, construction costs are high, and maintenance costs are high. At present, there is no limit ultra-thin asphalt pavement in the world. Contents of the invention [0003] The invention provides an extreme ultra-thin asphalt pavement, which has the advantages of eliminating bending and pulling fatigue damage and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32E01C7/18
Inventor 张靖
Owner 张靖
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