CN212077577U - Functional gradient composite micro-surfacing structure for track repair - Google Patents
Functional gradient composite micro-surfacing structure for track repair Download PDFInfo
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- CN212077577U CN212077577U CN201922170936.XU CN201922170936U CN212077577U CN 212077577 U CN212077577 U CN 212077577U CN 201922170936 U CN201922170936 U CN 201922170936U CN 212077577 U CN212077577 U CN 212077577U
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Abstract
The utility model discloses a be used for prosthetic function gradient of rut compound little table department structure, thickness that sets gradually including top-down is 8mm ~ 10mm fine level and is joined in marriage the little table department layer of high viscosity, high viscosity emulsified asphalt tie coat, thickness and is less than or equal to 25 mm's coarse level and is joined in marriage the little table department of high modulus and fill rut layer, original bituminous paving layer. The micro-surfacing asphalt mixture has stronger high-temperature deformation resistance by adopting the emulsified asphalt with high modulus and high emulsification point and using the asphalt with coarse gradation and lower gradation; the high-viscosity emulsified asphalt is used as the bonding layer, so that the micro-surface of the surface layer is bonded with the base surface of the original asphalt pavement more tightly, and the defects of peeling and the like caused by debonding are not easy to occur; the high-viscosity emulsified asphalt with high elastic recovery, high viscosity and high emulsifying point is used as the cementing material of the wearing layer at the micro-surfacing, and the fine grading with the particle size of 8mm is adopted, so that the elastic recovery capability and the anti-scattering capability at the micro-surfacing can be improved, and the road noise can be obviously reduced.
Description
Technical Field
The utility model relates to a highway construction technical field especially relates to a compound little table department structure of functional gradient for rut is restoreed.
Background
At present, the mileage of the expressway in China is the first in the world, and most of the expressway in China is paved by adopting asphalt pavements. Therefore, many tens of thousands of kilometers of highways are required to be maintained or preventively maintained every year in China. Micro-surfacing is widely used as a preventative maintenance program, including repair of minor ruts. However, the currently adopted micro-surfacing is mainly SBR modified emulsified asphalt, which has poor high-temperature stability, and can only treat rut diseases below 15mm and develop stably, and deeper ruts can only be milled and paved, so that the maintenance cost is increased. In addition, the existing SBR modified emulsified asphalt system has poor viscoelasticity, and the prepared mixture has higher noise.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compound little table department structure of functional gradient for rut is restoreed, little table department mixture through adopting high-modulus emulsified asphalt and coarse level to join in marriage to prepare carries out the rut and fills, fine bearing capacity and high temperature stability have, use high viscosity emulsified asphalt and the little table department mixture of preparing of finer level to carry out the top facing, this top layer has stronger water-blocking performance, the performance of making an uproar falls and travelling comfort, the current little table department self high temperature stability who exists has been solved among the above-mentioned prior art is not enough, it is shallow to fill the rut degree of depth, the relatively poor problem of travelling comfort.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a functionally graded composite micro-surfacing structure for repairing ruts comprises a fine-graded high-viscosity micro-surfacing layer with the thickness of 8-10 mm, a high-viscosity emulsified asphalt bonding layer and a coarse-graded high-modulus micro-surfacing layer with the thickness of less than or equal to 25mm, which are sequentially arranged from top to bottom, and a rut layer and an original asphalt pavement layer are filled.
Further, the fine-graded high-viscosity micro surfacing layer is a micro surfacing layer which is prepared by high-viscosity emulsified asphalt and has the nominal maximum particle size of 8 mm.
Further, the solid content of the high-viscosity emulsified asphalt is more than 62%, the softening point of evaporation residues is more than 80 ℃, the viscosity at 60 ℃ is more than 20000Pa.s, and the elastic recovery is more than 95%.
Further, the mixing amount of the high-viscosity emulsified asphalt is 9-13% of the total mass of the mixture.
Further, the high-viscosity emulsified asphalt bonding layer is a bonding layer prepared from high-viscosity emulsified asphalt, the solid content of the high-viscosity emulsified asphalt is more than 50%, the softening point of evaporation residues is more than 80 ℃, and the viscosity at 60 ℃ is more than 20000 Pa.s.
Further, the spreading amount of the high-viscosity emulsified asphalt is 0.4L/m2～0.6L/m2。
Further, the rough-graded high-modulus micro-surfacing filling rut layer is a micro-surfacing layer which is prepared from high-modulus emulsified asphalt and has the nominal maximum particle size of 10 mm.
Further, the solid content of the high-modulus emulsified asphalt is more than 65%, the softening point of evaporation residues is more than 80 ℃, the penetration degree at 25 ℃ is less than 40, and the viscosity at 60 ℃ is more than 20000 Pa.s.
Further, the doping amount of the high-modulus emulsified asphalt is 8-11% of the total mass of the mixture.
Furthermore, the original asphalt pavement layer is an original pavement wearing layer and is paved by adopting an AC-13 dense-graded asphalt mixture. The original asphalt pavement layer should finish the treatment of pits and the repair of larger cracks.
Compared with the prior art, the utility model provides a compound little table department structure of functional gradient for rut is restoreed possesses following beneficial effect:
(1) because the emulsified asphalt with high modulus and high emulsification point is adopted and the asphalt with coarse gradation and lower gradation is used, the asphalt mixture at the micro-surface has stronger high-temperature deformation resistance, the width change rate of the wheel track deformation test is lower than 1.5 percent, the depth change rate is lower than 4 percent and is only 50 to 60 percent of that of the SBR modified emulsified micro-surface;
(2) the high-viscosity emulsified asphalt is used as the bonding layer, so that the micro-surface of the surface layer is bonded with the base surface of the original asphalt pavement more tightly, and the defects of peeling and the like caused by debonding are not easy to occur;
(3) the high-viscosity emulsified asphalt with high elastic recovery, high viscosity and high emulsification point is used as the cementing material of the wearing layer at the micro-surfacing, and meanwhile, the fine grading with the nominal grain diameter of 8mm is adopted, so that the elastic recovery capability and the anti-flying capability of the micro-surfacing can be improved, the wet wheel wearing loss is reduced by more than 30 percent compared with the SBR modified emulsified micro-surfacing under the condition of the same oilstone ratio, and the road noise can be reduced by 1 dB-2 dB.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. a fine-graded high viscosity micro-surfacing layer; 2. a high viscosity emulsified asphalt bond coat; 3. filling a rut layer at the rough grading high-modulus micro-surfacing; 4. the original asphalt pavement layer.
Detailed Description
The technical solution of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1, the utility model provides a compound little table department structure of functional gradient for rut is restoreed, thickness that sets gradually including top-down is 8mm ~ 10mm fine level and joins in marriage the little table department layer of high viscosity, high viscosity emulsified asphalt tie coat, thickness and is less than or equal to 25 mm's coarse level and joins in marriage the little table department of high modulus and fill rut layer, original asphalt pavement layer.
The fine-graded high-viscosity micro-surfacing layer is prepared by high-viscosity emulsified asphalt with the solid content of more than 62 percent, the nominal maximum grain diameter of the aggregate is 8mm, the doping amount of the high-viscosity emulsified asphalt is 9 to 13 percent of the total mass of the mixture, the softening point of evaporation residues of the high-viscosity emulsified asphalt is more than 80 ℃, the viscosity of more than 20000Pa.s at 60 ℃ and the elastic recovery of more than 95 percent.
The high-viscosity emulsified asphalt adhesive layer is prepared by high-viscosity emulsified asphalt with solid content more than 50 percent, and the spreading amount of the high-viscosity emulsified asphalt is 0.4L/m2～0.6L/m2The evaporation residue has a softening point of more than 80 ℃ and a viscosity of more than 20000Pa.s at 60 ℃.
The rough-grading high-modulus micro-surfacing filling rut layer is prepared by high-modulus emulsified asphalt with the solid content of more than 65%, the nominal maximum particle size of aggregate is 10mm, the doping amount of the high-modulus emulsified asphalt is 8-11% of the total mass of the mixture, the softening point of evaporation residues of the high-modulus emulsified asphalt is more than 80 ℃, the penetration at 25 ℃ is less than 40, and the viscosity at 60 ℃ is more than 20000 Pa.s.
The original asphalt pavement layer is an original pavement wearing layer, is paved by adopting an AC-13 dense-graded asphalt mixture, and is required to treat pits and repair larger cracks before filling tracks.
Thus, by adopting the emulsified asphalt with high modulus and high emulsification point and using the asphalt with coarse gradation and lower gradation, the asphalt mixture at the micro-surface has stronger high-temperature deformation resistance, the track deformation test width change rate is lower than 1.5 percent, the depth change rate is lower than 4 percent and is only 50 to 60 percent of the SBR modified emulsified micro-surface; the high-viscosity emulsified asphalt is used as the bonding layer, so that the micro-surface of the surface layer is bonded with the base surface of the original asphalt pavement more tightly, and the defects of peeling and the like caused by debonding are not easy to occur; the high-viscosity emulsified asphalt with high elastic recovery, high viscosity and high emulsification point is used as the cementing material of the wearing layer at the micro-surfacing, and meanwhile, the fine grading with the nominal grain diameter of 8mm is adopted, so that the elastic recovery capability and the anti-flying capability of the micro-surfacing can be improved, the wet wheel wearing loss is reduced by more than 30 percent compared with the SBR modified emulsified micro-surfacing under the condition of the same oilstone ratio, and the road noise can be reduced by 1 dB-2 dB.
The present invention will be described in further detail below with reference to detailed embodiments and the accompanying drawings.
Example one
Referring to fig. 1, the first embodiment provides a functionally graded composite micro-surfacing structure for rutting repair, which includes a fine-graded high-viscosity micro-surfacing layer 1 with a thickness of 8mm, a high-viscosity emulsified asphalt bonding layer 2, a coarse-graded high-modulus micro-surfacing filling rutting layer 3 with a thickness of 18mm, and an original asphalt pavement layer 4, which are sequentially disposed from top to bottom.
Wherein, the original asphalt pavement layer 4 is an original pavement wearing layer, is paved by adopting an AC-13 dense-graded asphalt mixture, and pits need to be treated and larger cracks need to be repaired before the track is filled; then, a rough-graded high-modulus micro-surfacing filling rut layer 3 is laid on a rut pit groove, the rough-graded high-modulus micro-surfacing filling rut layer 3 is prepared by high-modulus emulsified asphalt with the solid content of 65.2%, the nominal maximum particle size of aggregate is 10mm, and the doping amount of the high-modulus emulsified asphalt is the mixture8% of the total mass, the softening point of evaporation residues of the high-modulus emulsified asphalt reaches 80.8 ℃, the penetration at 25 ℃ is 39, and the viscosity at 60 ℃ reaches 20043 Pa.s; then, a high-viscosity emulsified asphalt bonding layer 2 is paved, the high-viscosity emulsified asphalt bonding layer 2 is prepared by high-viscosity emulsified asphalt with the solid content of 50.4 percent, and the spreading amount of the high-viscosity emulsified asphalt is 0.4L/m2The softening point of evaporation residue reaches 80.2 ℃, and the viscosity reaches 20021Pa.s at 60 ℃; and finally, paving a fine-graded high-viscosity micro-surfacing layer 1, wherein the fine-graded high-viscosity micro-surfacing layer 1 is prepared by high-viscosity emulsified asphalt with the solid content of 63%, the nominal maximum grain size of the aggregate is 8mm, the doping amount of the high-viscosity emulsified asphalt is 9% of the total mass of the mixture, the softening point of evaporation residues of the high-viscosity emulsified asphalt reaches 80.6 ℃, the viscosity reaches 20038Pa.s at 60 ℃, and the elastic recovery reaches 95.2%.
Example two
Referring to fig. 1, the second embodiment provides a functionally graded composite micro-surfacing structure for rutting repair, which includes a fine-graded high-viscosity micro-surfacing layer 1 with a thickness of 9mm, a high-viscosity emulsified asphalt bonding layer 2, a coarse-graded high-modulus micro-surfacing filling rutting layer 3 with a thickness of 20mm, and an original asphalt pavement layer 4, which are sequentially arranged from top to bottom.
Wherein, the original asphalt pavement layer 4 is an original pavement wearing layer, is paved by adopting an AC-13 dense-graded asphalt mixture, and pits need to be treated and larger cracks need to be repaired before the track is filled; then, paving a rough-graded high-modulus micro-surfacing filling rut layer 3 on a rut pit groove, wherein the rough-graded high-modulus micro-surfacing filling rut layer 3 is prepared by high-modulus emulsified asphalt with the solid content of 66.4%, the nominal maximum particle size of aggregate is 10mm, the doping amount of the high-modulus emulsified asphalt is 10% of the total mass of the mixture, the softening point of evaporation residues of the high-modulus emulsified asphalt reaches 81.7 ℃, the penetration at 25 ℃ is 37, and the viscosity at 60 ℃ reaches 20067 Pa.s; then, a high-viscosity emulsified asphalt bonding layer 2 is paved, the high-viscosity emulsified asphalt bonding layer 2 is prepared by adopting high-viscosity emulsified asphalt with the solid content of 51.4 percent, and the spreading amount of the high-viscosity emulsified asphalt is 0.5L/m2The softening point of evaporation residue reaches 80.8 ℃, and the viscosity reaches 20028Pa.s at 60 ℃; finally, a layer of fine-graded high-viscosity cement is pavedThe micro-surfacing layer 1 with the viscosity and the high viscosity is prepared by high-viscosity emulsified asphalt with the solid content of 65 percent, the nominal maximum grain diameter of the aggregate is 8mm, the doping amount of the high-viscosity emulsified asphalt is 11 percent of the total mass of the mixture, the softening point of evaporation residue of the high-viscosity emulsified asphalt reaches 81.3 ℃, the viscosity reaches 20056Pa.s at 60 ℃, and the elastic recovery reaches 96.6 percent.
EXAMPLE III
Referring to fig. 1, the third embodiment provides a functionally graded composite micro-surfacing structure for rutting repair, which includes a fine-graded high-viscosity micro-surfacing layer 1 with a thickness of 10mm, a high-viscosity emulsified asphalt bonding layer 2, a coarse-graded high-modulus micro-surfacing filling rutting layer 3 with a thickness of 25mm, and an original asphalt pavement layer 4, which are sequentially arranged from top to bottom.
Wherein, the original asphalt pavement layer 4 is an original pavement wearing layer, is paved by adopting an AC-13 dense-graded asphalt mixture, and pits need to be treated and larger cracks need to be repaired before the track is filled; then, paving a rough-graded high-modulus micro-surfacing filling rut layer 3 on a rut pit groove, wherein the rough-graded high-modulus micro-surfacing filling rut layer 3 is prepared by high-modulus emulsified asphalt with the solid content of 65.7%, the nominal maximum particle size of aggregate is 10mm, the doping amount of the high-modulus emulsified asphalt is 11% of the total mass of the mixture, the softening point of evaporation residues of the high-modulus emulsified asphalt reaches 81.1 ℃, the penetration at 25 ℃ is 38, and the viscosity at 60 ℃ reaches 20051 Pa.s; then, a high-viscosity emulsified asphalt bonding layer 2 is paved, the high-viscosity emulsified asphalt bonding layer 2 is prepared by high-viscosity emulsified asphalt with the solid content of 50.9 percent, and the spreading amount of the high-viscosity emulsified asphalt is 0.6L/m2The softening point of evaporation residue reaches 80.5 ℃, and the viscosity reaches 20028Pa.s at 60 ℃; and finally, paving a fine-graded high-viscosity micro-surfacing layer 1, wherein the fine-graded high-viscosity micro-surfacing layer 1 is prepared by high-viscosity emulsified asphalt with the solid content of 64%, the nominal maximum grain size of the aggregate is 8mm, the doping amount of the high-viscosity emulsified asphalt is 13% of the total mass of the mixture, the softening point of evaporation residues of the high-viscosity emulsified asphalt reaches 80.9 ℃, the viscosity reaches 20044Pa.s at 60 ℃, and the elastic recovery reaches 96.3%.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A functionally graded composite micro-surfacing structure for repairing ruts is characterized by comprising a fine-graded high-viscosity micro-surfacing layer with the thickness of 8-10 mm, a high-viscosity emulsified asphalt bonding layer, a coarse-graded high-modulus micro-surfacing layer with the thickness of less than or equal to 25mm and a rut filling layer and an original asphalt pavement layer which are sequentially arranged from top to bottom.
2. The functionally graded composite micro-surfacing structure for rutting repair according to claim 1, wherein the fine-graded high viscosity micro-surfacing layer is a micro-surfacing layer with a nominal maximum particle size of 8mm formulated with high viscosity emulsified asphalt.
3. The functionally graded composite micro-surfacing structure for rutting repair according to claim 2, wherein the high viscosity emulsified asphalt has a solid content > 62%, an evaporation residue softening point > 80 ℃, a viscosity > 20000pa.s at 60 ℃ and an elastic recovery > 95%.
4. The functionally graded composite micro-surfacing structure for rutting restoration according to claim 1, wherein the high viscosity emulsified asphalt bonding layer is a bonding layer prepared from high viscosity emulsified asphalt, the solid content of the high viscosity emulsified asphalt is more than 50%, the softening point of evaporation residue is more than 80 ℃, and the viscosity at 60 ℃ is more than 20000 Pa.s.
5. The functionally graded composite micro-surfacing structure for rutting repair according to claim 4, wherein the high viscosity emulsified asphalt has a spreading amount of 0.4L/m2～0.6L/m2。
6. The functionally graded composite micro-surfacing structure for rutting repair according to claim 1, wherein the macro-graded high modulus micro-surfacing filling rutting layer is a micro-surfacing with a nominal maximum particle size of 10mm formulated with high modulus emulsified asphalt.
7. The functionally graded composite micro-surfacing structure for rutting repair according to claim 6, wherein the high modulus emulsified asphalt has a solid content > 65%, an evaporation residue softening point > 80 ℃, a penetration < 40 at 25 ℃ and a viscosity > 20000Pa.s at 60 ℃.
8. The functionally graded composite micro-surfacing structure for rutting restoration according to claim 1, wherein the original asphalt pavement layer is an original pavement wearing layer and is laid by an AC-13 dense-graded asphalt mixture.
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| CN201922170936.XU CN212077577U (en) | 2019-12-06 | 2019-12-06 | Functional gradient composite micro-surfacing structure for track repair |
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| CN201922170936.XU CN212077577U (en) | 2019-12-06 | 2019-12-06 | Functional gradient composite micro-surfacing structure for track repair |
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