CN102561142B - Limit ultrathin asphalt pavement - Google Patents
Limit ultrathin asphalt pavement Download PDFInfo
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- CN102561142B CN102561142B CN201210015253.7A CN201210015253A CN102561142B CN 102561142 B CN102561142 B CN 102561142B CN 201210015253 A CN201210015253 A CN 201210015253A CN 102561142 B CN102561142 B CN 102561142B
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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
The present invention relates to Bituminous Pavement Construction technical field, relate in particular to a kind of limit ultrathin asphalt pavement.
Background technology
Current flexible pavement thickness both domestic and external, all at 70mm-400mm, because thickness of bituminous surface is large, is easy to occur rut; Because thickness of bituminous surface is large, be not easy to occur breaks down, thereby ignored tack coat, therefore often there is the curved fatigue failure of drawing; Sometimes also there will be temperature gradient crack.Especially rut disease is the great technical barrier that high-grade highway never solves; Bituminous material costliness, builds cost high, and maintenance costs is high.Also there is no in the world at present limit ultrathin asphalt pavement.
Summary of the invention
The invention provides a kind of limit ultrathin asphalt pavement, have to eliminate and curvedly draw fatigue failure and rut disease, reduce asphalt surface course self thermal cracking disease, and build the advantages such as cost is low, maintenance costs is low, greatly improve economic benefit, be particularly suitable for highways and streets at different levels and airfield runway.
The technical solution used in the present invention is:
A kind of limit ultrathin asphalt pavement, comprises asphalt surface course, bonding oil reservoir, rigidity or semi-rigid type base, subbase, soil matrix from top to bottom, and wherein the thickness of asphalt surface course is 3-50mm.
The thickness of asphalt surface course is preferably 30-40mm.
The bonding oil that bonding oil reservoir uses is AH70#, AH90# pitch or SBS modified bitumen or sulfur modified pitch.
The beneficial effect that adopts technique scheme to produce is:
1. thinner asphalt surface course is in the pressure zone of road structure bending resistance section, coordinates with bonding oil by reducing thickness of bituminous surface and asphalt surface course, eliminates the curved fatigue failure of drawing; Eliminate rut disease; Reduce pavement temperature gradient crack.
2. significantly lower road surface and build cost and maintenance cost: approximately 4,300,000 yuan of costs are built in every kilometer of reduction of speedway, approximately 2,000,000 yuan of costs are built in every kilometer of reduction of Class I highway, approximately 600,000 yuan of costs are built in every kilometer of reduction of Class II highway, greatly improve economic benefit, be particularly suitable for highways and streets at different levels and airfield runway.
Detailed description of the invention
Embodiment:
Soil matrix, rigidity or semi-rigid type base, the same prior art of bonding oil reservoir (summary) in the present embodiment.
Use Finite Element is calculated, and result shows that the rut degree of depth of flexible pavement increases with the thickness of flexible pavement, in table 1:
Different surface thickness rut degree of depth statistics under 3,750,000 traffic loadings of table 1
| Surface thickness (mm) | Displacement in wheel (mm) | Wheel side displacement (mm) | The rut degree of 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 |
Experimental road testing result proves, due to frictional force and adhesion stress and the frictional force at the layer end of doughnut, has limited the horizontal plastic strain of asphalt surface course upper and lower surface, in the time that thickness of bituminous surface is not more than 50mm, there will not be rut.
The present invention shows, in table 2:
Table 2 temperature gradient stress calculating results
| Pitch thickness (mm) | Temperature gradient (degree/m) | Linear expansion coefficient | Modulus of elasticity (MPa) | Surface temperature stress (MPa) |
| 10 | 86 | 1.5×10 -5/ oC | 1400 | 0.018 |
| 30 | 86 | 1.5×10 -5/ oC | 1400 | 0.054 |
| 40 | 86 | 1.5×10 -5/ oC | 1400 | 0.072 |
| 50 | 86 | 1.5×10 -5/ oC | 1400 | 0.090 |
| 100 | 86 | 1.5×10 -5/ oC | 1400 | 0.180 |
| 150 | 86 | 1.5×10 -5/ oC | 1400 | 0.270 |
| 200 | 86 | 1.5×10 -5/ oC | 1400 | 0.360 |
| 300 | 86 | 1.5×10 -5/ oC | 1400 | 0.540 |
Note: 1, linear expansion coefficient is referring to the chief editor of " engineering material " Chang An University, People's Transportation Press.
2, temperature gradient is referring to JTG D40-2002 " highway cement pavement design specification ".
3, modulus of elasticity is referring to JTG D50-2006 " bituminous pavement design for highway specification ".
As can be seen from the above table, flexible pavement surface temperature stress increases with its thickness, and asphalt surface course is thinner, and surface temperature stress is less, occurs that the possibility in crack is less.
Thickness of bituminous surface of the present invention is to determine minimum thickness by bleeding (coefficient of permeability is not more than 30mml/min), planeness (meeting ministry standard requires), texture depth (meeting ministry standard requires).
The present invention, by reducing thickness and layer end bonding, makes asphalt surface course ensure to be in the pressure zone of road structure bending resistance section, does not produce flexural tensile stress, thereby eliminates the curved fatigue failure of drawing.
The demonstration of experimental road testing result, when bituminous sheaths bed thickness 3cm, indices exceedes second grade highway standard promulgated by the ministries or commissions of the Central Government; When bituminous sheaths bed thickness 4cm, indices exceedes speedway standard promulgated by the ministries or commissions of the Central Government.
The demonstration of experimental road testing result, a layer end adhesion strength reaches 0.8MPa-1.1MPa, and at the bottom of actual layer, shear stress only has 0.1MPa to 0.3MPa, ensures there will not be passing disease.
Note: the bonding oil that the oil reservoir that bonds when test uses, preferably use AH70#, AH90# pitch or SBS modified bitumen or sulfur modified pitch, can ensure or higher than above-mentioned technique effect.
Claims (2)
1. a limit ultrathin asphalt pavement, it comprises asphalt surface course, bonding oil reservoir, rigidity or semi-rigid type base, subbase, soil matrix from top to bottom, it is characterized in that, the thickness of described asphalt surface course is 3-50mm, the bonding oil that bonding oil reservoir uses is AH70#, AH90# pitch or SBS modified bitumen or sulfur modified pitch, layer end adhesion strength reaches 0.8MPa-1.1MPa, and layer end shear stress is 0.1MPa to 0.3MPa.
2. limit ultrathin asphalt pavement as claimed in claim 1, is characterized in that, the thickness of described asphalt surface course is 30-40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015253.7A CN102561142B (en) | 2012-01-18 | 2012-01-18 | Limit ultrathin asphalt pavement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210015253.7A CN102561142B (en) | 2012-01-18 | 2012-01-18 | Limit ultrathin asphalt pavement |
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| CN102561142A CN102561142A (en) | 2012-07-11 |
| CN102561142B true CN102561142B (en) | 2014-07-02 |
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| CN113957761B (en) * | 2021-11-02 | 2024-10-11 | 张靖 | Ultra-thin bituminous pavement of high-grade highway |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005226342A (en) * | 2004-02-13 | 2005-08-25 | Nippo Corporation:Kk | LOW mu PAVEMENT ROAD SURFACE AND ITS CONSTRUCTION METHOD |
| CN1687526A (en) * | 2005-04-18 | 2005-10-26 | 西安高远公路养护技术有限公司 | Reconditioning tracks on asphalt pavement by using thin paste mixture of modified emulsified asphalt and construction method thereof |
| CN101148856A (en) * | 2007-11-12 | 2008-03-26 | 徐培华 | Asphalt macadam stress absorption layer and construction method thereof |
| CN101363210A (en) * | 2007-08-12 | 2009-02-11 | 北京中交路星公路技术有限公司 | Anti-cracking and waterproof asphalt pavement surface structure and construction method |
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2012
- 2012-01-18 CN CN201210015253.7A patent/CN102561142B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005226342A (en) * | 2004-02-13 | 2005-08-25 | Nippo Corporation:Kk | LOW mu PAVEMENT ROAD SURFACE AND ITS CONSTRUCTION METHOD |
| CN1687526A (en) * | 2005-04-18 | 2005-10-26 | 西安高远公路养护技术有限公司 | Reconditioning tracks on asphalt pavement by using thin paste mixture of modified emulsified asphalt and construction method thereof |
| CN101363210A (en) * | 2007-08-12 | 2009-02-11 | 北京中交路星公路技术有限公司 | Anti-cracking and waterproof asphalt pavement surface structure and construction method |
| CN101148856A (en) * | 2007-11-12 | 2008-03-26 | 徐培华 | Asphalt macadam stress absorption layer and construction method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 半刚性基层沥青路面面层合理厚度探讨;李治平;《内蒙古公路与运输》;20000330(第01期);正文第2-3节 * |
| 李治平.半刚性基层沥青路面面层合理厚度探讨.《内蒙古公路与运输》.2000,(第01期), |
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