CN220619654U - Thermal regeneration asphalt pavement structure - Google Patents

Thermal regeneration asphalt pavement structure Download PDF

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Publication number
CN220619654U
CN220619654U CN202321955496.9U CN202321955496U CN220619654U CN 220619654 U CN220619654 U CN 220619654U CN 202321955496 U CN202321955496 U CN 202321955496U CN 220619654 U CN220619654 U CN 220619654U
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milling
asphalt
layer
asphalt pavement
reclaimed
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CN202321955496.9U
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郑松松
欧阳奕波
刘进
李振珂
彭长俊
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Gezhouba Group Transportation Investment Co ltd
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Gezhouba Group Transportation Investment Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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Abstract

The utility model provides a thermal regeneration asphalt pavement structure, which is used for repairing an asphalt pavement to be repaired, and comprises the following components: milling a surface, wherein the milling surface is an upper surface of a lower bearing layer left after milling treatment of an asphalt pavement to be repaired, and crack positions on the milling surface are provided with crack-resistant patches; the rubber asphalt synchronous macadam sealing layer is paved on the milling surface; the reclaimed asphalt mixture middle surface layer containing the milling material A is paved on the rubber asphalt synchronous macadam sealing layer; the PCR modified emulsified asphalt adhesive layer is paved on the surface layer in the reclaimed asphalt mixture; an epoxy reclaimed asphalt mixture upper layer containing a milling material B is paved on the PCR modified emulsified asphalt adhesive layer; the method comprises the steps of A milling materials, B milling materials and a grinding device, wherein the A milling materials are waste milling materials collected by milling the middle surface layer of the asphalt pavement to be repaired, and the B milling materials are waste milling materials collected by milling the upper surface layer of the asphalt pavement to be repaired.

Description

Thermal regeneration asphalt pavement structure
Technical Field
The utility model belongs to the technical field of maintenance of expressway pavements, and particularly relates to a hot recycled asphalt pavement structure.
Background
Asphalt pavement is widely applied to highway engineering construction in China because of the advantages of good driving comfort, low noise, construction convenience and the like, and the ratio of the asphalt pavement in expressways in China is over 90 percent. However, the service life of the asphalt pavement is generally 15-20 years, along with the rapid development of the economic industry in China in recent years, the traffic industry is rapidly increased, the proportion of overweight trucks in transportation is increased year by year, various diseases such as pavement pits, cracks, ruts and pushing occur in each service period of the expressway, a large amount of expressway asphalt pavement needs maintenance, milling and repacking each year, a large amount of milling and planing waste asphalt mixture is generated, and if the milling and planing waste asphalt mixture is completely abandoned, serious pollution is caused to the environment, and a large amount of earth and stone resources are also required to be mined to prepare new asphalt mixture, so that the resource pressure is increased.
The thermal regeneration method of the asphalt pavement is to re-lay the waste asphalt mixture on the asphalt pavement after regeneration, and can be used for maintenance of the asphalt pavement. The traditional asphalt pavement hot mix plant recycling method has the defects of low mixing amount of waste milling materials, limited utilization rate and economic benefit of the waste milling materials, poor pavement performance and durability of the recycled asphalt pavement, and easiness in occurrence of various diseases again.
Therefore, how to provide a thermal regeneration asphalt pavement structure for milling, paving and maintenance engineering of asphalt pavement to improve the utilization rate of waste milling materials and the high-temperature stability and fatigue durability of asphalt pavement is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims to provide a heat-regenerated asphalt pavement structure which at least solves one technical problem.
In order to achieve the above object, the present utility model provides a thermal regeneration asphalt pavement structure for repairing an asphalt pavement to be repaired, the asphalt pavement to be repaired sequentially including an upper layer, a middle layer and a lower bearing layer from top to bottom, the thermal regeneration asphalt pavement structure comprising: milling a surface, wherein the milling surface is an upper surface of the lower bearing layer left after milling treatment of the asphalt pavement to be repaired, and an anti-cracking paste is arranged at a position with a crack on the milling surface; the rubber asphalt synchronous macadam sealing layer is paved on the milling surface; the reclaimed asphalt mixture middle surface layer containing the milling material A is paved on the rubber asphalt synchronous macadam seal layer; the PCR modified emulsified asphalt adhesive layer is paved on the reclaimed asphalt mixture middle surface layer; the upper layer of the epoxy reclaimed asphalt mixture containing the B milling material is paved on the PCR modified emulsified asphalt adhesive layer; the A milling material is waste milling material collected by milling the middle layer of the asphalt pavement to be repaired, and the B milling material is waste milling material collected by milling the upper layer of the asphalt pavement to be repaired.
Preferably, the mass ratio of the milling material A in the waste milling material collected by milling the middle surface layer is 30%.
Preferably, the mass ratio of the B-milled material in the waste milled material collected by milling the upper layer is 100%.
Preferably, the thickness of the crack-resistant patch is 0.5m.
Preferably, the rubber asphalt synchronous macadam sealing layer consists of rubber asphalt and premixed macadam, wherein the rubber asphalt is paved on the milling surface, and the premixed macadam is paved on the rubber asphalt; wherein the premixed broken stone is formed by mixing rubber asphalt and broken stone, and the mass ratio of the rubber asphalt to the broken stone in the premixed broken stone is 0.5%.
Preferably, the sprinkling amount of the rubber asphalt paved on the milling surface is 1.5-1.8 kg/m 2 The thickness of the sprinkling cloth of the ready-mixed broken stone is 9.5-13.2 mm.
Preferably, the thickness of the surface layer in the reclaimed asphalt mixture is 6cm.
Preferably, the sprinkling amount of the PCR modified emulsified asphalt adhesive layer is 0.3-0.6 kg/m 2
Preferably, the upper layer of the epoxy reclaimed asphalt mixture also comprises epoxy asphalt, and the mixing amount of the epoxy asphalt accounts for 1.6-2.0% of the B milling material; the epoxy asphalt comprises epoxy resin, a curing agent and matrix asphalt.
Preferably, the thickness of the upper layer of the epoxy reclaimed asphalt mixture is 4cm.
The utility model has the following beneficial effects:
the utility model provides a thermal regeneration asphalt pavement structure, which is used for milling, paving and maintenance engineering of an asphalt pavement, milling the asphalt pavement to be repaired, leaving a lower bearing layer to obtain a milled surface, and arranging an anti-cracking patch (such as an anti-cracking patch with a high-strength anti-cracking function) at a position with a crack on the milled surface for repairing the crack; the rubber asphalt synchronous macadam sealing layer is arranged to prevent water infiltration and reflection cracks, so that the bearing capacity of the pavement structure is further improved; the method comprises the steps that a reclaimed asphalt mixture middle surface layer containing an A milling material, a PCR modified emulsified asphalt adhesive layer and an epoxy reclaimed asphalt mixture upper surface layer containing a B milling material are sequentially arranged on the rubber asphalt synchronous macadam sealing layer from bottom to top, wherein the A milling material is waste milling materials collected by milling the middle surface layer of an asphalt pavement to be repaired, the B milling material is waste milling materials collected by milling the upper surface layer of the asphalt pavement to be repaired, the reclaimed asphalt mixture middle surface layer containing the A milling material and the epoxy reclaimed asphalt mixture upper surface layer containing the B milling material are bonded through the PCR modified emulsified asphalt adhesive layer, so that the reclaimed asphalt mixture middle surface layer containing the A milling material and the epoxy reclaimed asphalt mixture upper surface layer containing the B milling material are bonded into a whole, and the utilization rate of the waste milling materials can be improved and the waste maintenance cost can be reduced because the A milling material and the B milling material are waste milling materials collected by milling the asphalt pavement to be repaired; the epoxy regenerated asphalt mixture upper layer containing the B milling material is used as the upper layer, so that the repaired asphalt pavement has good abrasion resistance, rutting resistance and fatigue resistance, namely, the thermal regenerated asphalt pavement structure provided by the utility model can not only improve the utilization rate of waste milling materials, but also improve the high-temperature stability and fatigue durability of the asphalt pavement, can well meet the use requirement of heavy-load high-grade roads, and can prolong the service life of the asphalt pavement.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a thermally reclaimed asphalt pavement structure of the present utility model.
Reference numerals illustrate:
1. milling the surface; 2. rubber asphalt synchronous macadam sealing layer; 3. a reclaimed asphalt mixture middle surface layer; 4. a PCR modified emulsified asphalt adhesive layer; 5. and (3) an upper layer of the epoxy reclaimed asphalt mixture.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments obtained by those skilled in the art based on the embodiments in this specification are within the scope of the utility model.
Embodiment one:
referring to fig. 1, a first embodiment of the present utility model provides a thermal regeneration asphalt pavement structure for repairing an asphalt pavement to be repaired, where the asphalt pavement to be repaired includes an upper layer, a middle layer and a lower bearing layer from top to bottom in sequence, and the thermal regeneration asphalt pavement structure includes: milling a surface 1, wherein the milling surface 1 is an upper layer surface of the lower bearing layer left after milling treatment of an asphalt pavement to be repaired, and an anti-cracking patch is arranged at a position with a crack on the milling surface 1; a rubber asphalt synchronous macadam sealing layer 2 laid on the milling surface 1; a surface layer 3 in the reclaimed asphalt mixture containing the milling material A is paved on the rubber asphalt synchronous macadam seal layer 2; a PCR modified emulsified asphalt adhesive layer 4 laid on the surface layer 3 in the reclaimed asphalt mixture; an epoxy reclaimed asphalt mixture upper layer 5 containing a B milling material is paved on the PCR modified emulsified asphalt adhesive layer 4; the A milling material is waste milling material collected by milling the middle layer of the asphalt pavement to be repaired, and the B milling material is waste milling material collected by milling the upper layer of the asphalt pavement to be repaired.
Specifically, the utility model provides a thermal regeneration asphalt pavement structure which is used for milling, paving and maintenance engineering of an asphalt pavement, milling the asphalt pavement to be repaired, leaving a lower bearing layer to obtain a milled surface 1, and arranging an anti-cracking patch (such as an anti-cracking patch with a high-strength anti-cracking function) at a position with a crack on the milled surface 1 for repairing the crack; the rubber asphalt synchronous macadam sealing layer 2 is arranged to prevent water infiltration and reflection cracks, so that the bearing capacity of the pavement structure is further improved; the method comprises the steps that a reclaimed asphalt mixture middle surface layer 3 containing an A milling material, a PCR modified emulsified asphalt adhesive layer 4 and an epoxy reclaimed asphalt mixture upper surface layer 5 containing a B milling material are sequentially arranged on the upper end face of a rubber asphalt synchronous macadam seal 2 from bottom to top, wherein the A milling material is waste milling materials collected by milling the middle surface layer of an asphalt pavement to be repaired, the B milling material is waste milling materials collected by milling the upper surface layer of the asphalt pavement to be repaired, the surface layer 3 in the reclaimed asphalt mixture containing the A milling material and the epoxy reclaimed asphalt mixture upper surface layer 5 containing the B milling material are bonded through the PCR modified emulsified asphalt adhesive layer 4, so that the surface layer 3 in the reclaimed asphalt mixture containing the A milling material and the epoxy reclaimed asphalt mixture upper surface layer 5 containing the B milling material are bonded into a whole, and the utilization rate of the waste milling materials collected by milling the milling treatment of the asphalt pavement to be repaired can be improved, and maintenance cost can be reduced; the epoxy regenerated asphalt mixture upper layer 5 containing the B milling material is used as an upper layer, so that the repaired asphalt pavement has good abrasion resistance, rutting resistance and fatigue resistance, namely, the thermal regenerated asphalt pavement structure provided by the utility model can not only improve the utilization rate of waste milling materials, but also improve the high-temperature stability and fatigue durability of the asphalt pavement, can well meet the use requirement of heavy-load high-grade roads, and can prolong the service life of the asphalt pavement.
In some possible embodiments, the a-mill has a mass fraction of 30% in the waste mill collected from the milling of the middle layer.
In order to ensure the performance of the recycled asphalt mixture, the mass ratio of the A milling material in the waste milling material collected by milling the middle surface layer is 30 percent, new stone and new modified asphalt are added into the A milling material, and the A milling material is mixed to form the recycled asphalt mixture containing the A milling material, so that the recycled asphalt mixture is paved on the rubber asphalt synchronous macadam seal layer 2.
In some possible embodiments, the B mill has a mass fraction of 100% in the waste mill collected by milling the upper layer.
In order to improve the utilization rate of the waste milling material, the mass ratio of the B milling material in the waste milling material collected by milling the upper layer is 100%, a certain proportion of epoxy asphalt is added into the B milling material, preferably, the B milling material is the waste milling material subjected to crushing and screening treatment, and the epoxy asphalt and the B milling material with a certain proportion are mixed to form an epoxy reclaimed asphalt mixture for being paved on the PCR modified emulsified asphalt adhesive layer 4.
In some possible embodiments, the crack resistant patch has a thickness of 0.5m.
Under the actual construction condition, a worker can mill the upper surface layer and the middle surface layer of the asphalt pavement to be repaired, the milling material of the upper surface layer and the milling material of the middle surface layer are stored separately, a lower bearing layer (the upper end surface of the lower bearing layer is the milling surface 1) is reserved, if the lower bearing layer is severely cracked and loose, the construction of the hot recycled asphalt pavement structure layer can be carried out after the maintenance is needed, the milling surface 1 is cleaned, after the crack is filled, a crack-resistant paste with the thickness of 0.5m (such as a crack-resistant paste with a high-strength crack-resistant function) is paved at the position with the crack so as to repair the crack, and the subsequent construction is not influenced.
In some possible embodiments, the rubber asphalt synchronous chip seal 2 consists of rubber asphalt laid on the milling surface 1 and pre-mixed chips laid on the rubber asphalt; wherein the premixed broken stone is formed by mixing rubber asphalt and broken stone, and the mass ratio of the rubber asphalt to the broken stone in the premixed broken stone is 0.5%.
It will be understood by those skilled in the art that the rubber asphalt synchronous macadam seal 2 is composed of rubber asphalt and premixed macadam, the premixed macadam is formed by mixing the rubber asphalt and the macadam, the mass ratio of the rubber asphalt to the macadam in the premixed macadam is 0.5%, a layer of rubber asphalt is paved on the milling face 1, then a layer of premixed macadam is paved, the rubber asphalt can be tightly connected with the milling face 1 by using the cohesiveness of the rubber asphalt, and meanwhile, the rubber asphalt in the premixed macadam and the rubber asphalt paved in the first layer of rubber asphalt are the same substance, and the rubber asphalt synchronous macadam seal 2 bonded with the milling face 1 can be obtained by mixing without gaps.
In some possible embodiments, the sprinkling amount of the rubber asphalt laid on the milling surface 1 is 1.5-1.8 kg/m 2 The thickness of the sprinkling cloth of the ready-mixed broken stone is 9.5-13.2 mm.
In some possible embodiments, the thickness of the surface layer 3 in the reclaimed asphalt mixture is 6cm.
In some possible embodiments, the sprinkling amount of the PCR modified emulsified asphalt adhesive layer 4 is 0.3-0.6 kg/m 2
In some possible embodiments, the epoxy asphalt mixture upper layer 5 further comprises epoxy asphalt, and the mixing amount of the epoxy asphalt accounts for 1.6% -2.0% of the B milling material; the epoxy asphalt comprises epoxy resin, a curing agent and matrix asphalt.
The epoxy asphalt belongs to a thermosetting material, and the epoxy asphalt mixture formed by mixing the epoxy asphalt with the B milling material has high strength, excellent durability, cohesiveness and fatigue resistance after being solidified, and the epoxy asphalt mixture is paved on the upper surface layer 5 of the epoxy asphalt mixture containing the B milling material, which can be the repaired asphalt pavement with better abrasion resistance, rutting resistance and fatigue resistance. Preferably, the epoxy asphalt is incorporated in an amount of 1.7% of the B mill stock.
In some possible embodiments, the thickness of the epoxy reclaimed asphalt mixture upper layer 5 is 4cm.
It should be noted that, because the preparation cost of epoxy asphalt in the upper layer 5 of the epoxy asphalt mixture is very high, and in order to reduce the cost and not affect the comprehensive performance and service life of the repaired asphalt pavement, the use of the epoxy asphalt mixture can be reduced, so that the epoxy asphalt mixture prepared by using 100% of waste milling materials is paved on the upper layer of the asphalt pavement to be repaired, and the 30% of the regenerated asphalt mixture prepared by using the waste milling materials and the rubber asphalt synchronous macadam seal layer are paved on the middle layer of the asphalt pavement to be repaired, as an optimal implementation mode, the following steps are adopted: the sprinkling amount of the rubber asphalt laid on the milling surface 1 is 1.5-1.8 kg/m 2 The sprinkling thickness of the ready-mixed broken stone paved on the rubber asphalt is 9.5-13.2 mm, the thickness of the surface layer 3 in the reclaimed asphalt mixture paved on the rubber asphalt synchronous broken stone sealing layer 2 is 6cm, and the sprinkling amount of the PCR modified emulsified asphalt adhesive layer 4 paved on the surface layer 3 in the reclaimed asphalt mixture is 0.3-0.6 kg/m 2 Laid on PCThe thickness of the upper layer 5 of the epoxy reclaimed asphalt mixture on the upper surface of the R modified emulsified asphalt adhesive layer 4 is 4cm.
Finally, it should be noted that: the above examples are only specific embodiments of the present utility model, and are not intended to limit the scope of the present utility model, but it should be understood by those skilled in the art that the present utility model is not limited thereto, and that the present utility model is described in detail with reference to the above examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit of the corresponding technical solutions. Are intended to be encompassed within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (10)

1. The utility model provides a hot recycling bituminous pavement structure for repair the bituminous pavement who treats the repair, the bituminous pavement who treats the repair includes upper strata, mesocoat and lower layer of bearing from top to bottom in proper order, its characterized in that, hot recycling bituminous pavement structure includes:
milling a surface, wherein the milling surface is an upper surface of the lower bearing layer left after milling treatment of the asphalt pavement to be repaired, and an anti-cracking paste is arranged at a position with a crack on the milling surface;
the rubber asphalt synchronous macadam sealing layer is paved on the milling surface;
the reclaimed asphalt mixture middle surface layer containing the milling material A is paved on the rubber asphalt synchronous macadam seal layer;
the PCR modified emulsified asphalt adhesive layer is paved on the reclaimed asphalt mixture middle surface layer;
the upper layer of the epoxy reclaimed asphalt mixture containing the B milling material is paved on the PCR modified emulsified asphalt adhesive layer;
the A milling material is waste milling material collected by milling the middle layer of the asphalt pavement to be repaired, and the B milling material is waste milling material collected by milling the upper layer of the asphalt pavement to be repaired.
2. The thermally reclaimed asphalt pavement structure of claim 1, wherein:
the mass ratio of the milling material A in the waste milling material collected by milling the middle surface layer is 30%.
3. The thermally reclaimed asphalt pavement structure of claim 2, wherein:
the mass ratio of the B milling material in the waste milling material collected by milling the upper layer is 100%.
4. The thermally regenerated asphalt pavement structure of claim 3 wherein the crack resistant patch has a thickness of 0.5m.
5. The thermal reclaimed asphalt pavement structure of claim 4, wherein the rubber asphalt synchronous macadam seal is comprised of rubber asphalt laid on top of the milled surface and pre-mixed macadam laid on top of the rubber asphalt.
6. The thermally regenerated asphalt pavement structure of claim 5 wherein said upper surface of said milled surface is covered by said thermoplastic resinThe sprinkling amount of the rubber asphalt is 1.5-1.8 kg/m 2 The thickness of the sprinkling cloth of the ready-mixed broken stone is 9.5-13.2 mm.
7. The thermal reclaimed asphalt pavement structure of claim 5, wherein the reclaimed asphalt mix middle layer has a thickness of 6cm.
8. The thermally regenerated asphalt pavement structure of claim 6, wherein the PCR modified emulsified asphalt binder layer has a spread of 0.3 to 0.6kg/m 2
9. The thermally reclaimed asphalt pavement structure of claim 7, wherein the epoxy reclaimed asphalt mixture upper layer further comprises epoxy asphalt.
10. The thermally reclaimed asphalt pavement structure of claim 9, wherein the epoxy reclaimed asphalt mixture upper layer has a thickness of 4cm.
CN202321955496.9U 2023-07-24 2023-07-24 Thermal regeneration asphalt pavement structure Active CN220619654U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321955496.9U CN220619654U (en) 2023-07-24 2023-07-24 Thermal regeneration asphalt pavement structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321955496.9U CN220619654U (en) 2023-07-24 2023-07-24 Thermal regeneration asphalt pavement structure

Publications (1)

Publication Number Publication Date
CN220619654U true CN220619654U (en) 2024-03-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321955496.9U Active CN220619654U (en) 2023-07-24 2023-07-24 Thermal regeneration asphalt pavement structure

Country Status (1)

Country Link
CN (1) CN220619654U (en)

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