CN102561142A - Limit ultrathin asphalt pavement - Google Patents
Limit ultrathin asphalt pavement Download PDFInfo
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- CN102561142A CN102561142A CN2012100152537A CN201210015253A CN102561142A CN 102561142 A CN102561142 A CN 102561142A CN 2012100152537 A CN2012100152537 A CN 2012100152537A CN 201210015253 A CN201210015253 A CN 201210015253A CN 102561142 A CN102561142 A CN 102561142A
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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 flexible pavement construction technique field, relate in particular to the ultra-thin flexible pavement of a kind of limit.
Background technology
Present flexible pavement thickness both domestic and external because thickness of bituminous surface is big, is easy to occur rut all at 70mm-400mm; Because thickness of bituminous surface is big, be not easy to occur breaks down, thereby ignored tack coat, therefore the curved fatigue failure of drawing often appears; Sometimes also can appearance temperature gradient crack.Especially the rut disease is the great technical barrier that high-grade highway never solves; Bituminous material is expensive, builds the cost height, and maintenance costs is high.Also there is not the ultra-thin flexible pavement of the limit at present in the world.
Summary of the invention
The present invention provides a kind of limit ultra-thin flexible pavement; Have and eliminate curved fatigue failure and rut disease, minimizing asphalt surface course self the thermal cracking disease of drawing; And build advantages such as cost is low, maintenance costs is low; Improve economic benefit greatly, be particularly suitable for highways at different levels, urban road and airfield runway.
The technical scheme that the present invention taked is:
The ultra-thin flexible pavement of a kind of limit 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 employed bonding oil of bonding oil reservoir is AH70#, AH90# pitch or SBS modified bitumen or sulphur modified bitumen.
Adopt the beneficial effect that technique scheme produced to be:
1. thin asphalt surface course is in the pressure zone of road structure bending resistance section, cooperates with bonding oil through reducing thickness of bituminous surface and asphalt surface course, eliminates the curved fatigue failure of drawing; Eliminate the rut disease; Reduce pavement temperature gradient crack.
2. lower the road surface significantly and build cost and maintenance cost: about 4,300,000 yuan of cost is built in every kilometer reduction of speedway; About 2,000,000 yuan of cost is built in every kilometer reduction of Class I highway; About 600,000 yuan of cost is built in every kilometer reduction of Class II highway; Improve economic benefit greatly, be particularly suitable for highways at different levels, urban road and airfield runway.
The specific embodiment
Embodiment:
Soil matrix, rigidity or semi-rigid type base, the same prior art of bonding oil reservoir (summary) in the present embodiment.
The use FInite Element calculates, and the result shows the thickness increase of the rut degree of depth of flexible pavement with flexible pavement, sees table 1:
Different facial layer thickness rut degree of depth statistics under 3,750,000 traffic loadings of table 1
| Surface thickness (mm) | Displacement in the 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 |
The experimental road testing result proves, because the frictional force of doughnut and the layer adhesion stress and the frictional force at the end have limited the horizontal plastic strain of asphalt surface course upper and lower surface, when thickness of bituminous surface is not more than 50mm, rut can not occur.
The present invention shows, sees table 2:
Table 2 temperature gradient stress calculation result
| 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 |
Annotate: 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 standard ".
3, modulus of elasticity is referring to JTG D50-2006 " asphalt highway design specifications ".
Can be found out that by last table flexible pavement surface temperature stress increases with its thickness, asphalt surface course is thin more, and surface temperature stress is more little, and the possibility that the crack occurs is more little.
Thickness of bituminous surface of the present invention is by bleeding (coefficient of permeability is not more than 30mml/min), planeness (meeting ministry standard requires), texture depth (meeting ministry standard requires) decision minimum thickness.
The present invention makes asphalt surface course guarantee to be in the pressure zone of road structure bending resistance section through reducing thickness and layer end bonding, does not produce flexural tensile stress, thereby eliminates the curved fatigue failure of drawing.
The experimental road testing result shows that during bituminous sheaths bed thickness 3cm, each item index surpasses second grade highway standard promulgated by the ministries or commissions of the Central Government; During bituminous sheaths bed thickness 4cm, each item index surpasses speedway standard promulgated by the ministries or commissions of the Central Government.
The experimental road testing result shows that layer end adhesion strength reaches 0.8MPa-1.1MPa, and shear stress has only 0.1MPa to 0.3MPa at the bottom of the actual layer, guarantees can not occur passing disease.
Annotate: the bonding oil that the bonding oil reservoir uses during test, preferably use AH70#, AH90# pitch or SBS modified bitumen or sulphur modified bitumen, can guarantee or be higher than above-mentioned technique effect.
Claims (3)
1. the ultra-thin flexible pavement of the limit comprises asphalt surface course, bonding oil reservoir, rigidity or semi-rigid type base, subbase, soil matrix from top to bottom, and the thickness that it is characterized in that said asphalt surface course is 3-50mm.
2. the ultra-thin flexible pavement of a kind of limit as claimed in claim 1, the thickness that it is characterized in that said asphalt surface course is 30-40mm.
3. according to claim 1 or claim 2 the ultra-thin flexible pavement of a kind of limit, it is characterized in that: the employed bonding oil of bonding oil reservoir is AH70#, AH90# pitch or SBS modified bitumen or sulphur modified bitumen.
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 |
|---|---|---|---|
| CN201210015253.7A CN102561142B (en) | 2012-01-18 | 2012-01-18 | Limit ultrathin asphalt pavement |
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| CN102561142A true CN102561142A (en) | 2012-07-11 |
| CN102561142B CN102561142B (en) | 2014-07-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957761A (en) * | 2021-11-02 | 2022-01-21 | 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 |
-
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 (1)
| Title |
|---|
| 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》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957761A (en) * | 2021-11-02 | 2022-01-21 | 张靖 | Ultra-thin bituminous pavement of high-grade highway |
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| CN102561142B (en) | 2014-07-02 |
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