CN217324808U - Long-life quiet road surface structure - Google Patents
Long-life quiet road surface structure Download PDFInfo
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- CN217324808U CN217324808U CN202220118344.2U CN202220118344U CN217324808U CN 217324808 U CN217324808 U CN 217324808U CN 202220118344 U CN202220118344 U CN 202220118344U CN 217324808 U CN217324808 U CN 217324808U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The utility model relates to a road engineering field especially relates to a quiet road surface structure of long-life. The pavement structure comprises a semi-rigid base layer, a first asphalt bonding layer, a mixture lower surface layer, a second asphalt bonding layer, a mixture middle surface layer, a third asphalt bonding layer and a mixture upper surface layer which are sequentially arranged from bottom to top; the semi-rigid base layer is a cement stabilized macadam base layer; the first asphalt bonding layer is a rubber asphalt stress absorbing layer; the lower surface layer of the mixture is an AC-25 coarse grain type asphalt concrete lower surface layer; the second asphalt bonding layer is an SBS emulsified asphalt bonding layer; the middle surface layer of the mixture is a high-modulus anti-fatigue asphalt concrete middle surface layer; the third asphalt bonding layer is a rubber asphalt mortar bonding layer; the upper layer of the mixture is a polyurethane porous elastic mixture upper layer. The utility model provides a quiet road surface of long-life possesses the damping and falls the function of making an uproar, has improved porous elastic mixture surface course and has easily debonded, takes place the problem of early damage with lower layer, has prolonged functional layer structure life-span.
Description
Technical Field
The utility model relates to a road engineering field especially relates to a long-life quiet road surface structure.
Background
With the rapid development of urban construction and the increasing year by year of vehicles, traffic noise becomes a non-negligible problem. Human beings are in a high-noise environment for a long time, and not only can seriously damage the hearing system, but also can influence the nervous system and the cardiovascular system. Because the noise generated by the contact between the tire and the road occupies a great proportion in traffic noise pollution, the reduction of the tire/road noise is an effective method for controlling the traffic noise, and the quiet road surface for reducing the tire road noise is realized by a porous sound absorption and elastic shock absorption mode, so that a good noise reduction effect can be realized by virtue of the large void ratio and the high rubber particle mixing amount, and a positive effect is played on the establishment of high-quality human living and traveling environments. Meanwhile, a cold mixing and cold paving method is adopted during paving, so that the energy consumption and the environmental pollution are reduced compared with those of an asphalt pavement.
However, research and application practices show that the porous elastic mixture surface layer is easy to be debonded from the lower bearing layer and is damaged early. An interface bonding method of polyurethane gap elastic mixture and asphalt mixture (201610424897.X) provides that a polyurethane adhesive fine sand layer with the thickness of 3-5 mm is arranged between an upper surface layer of the gap elastic mixture and a lower bearing layer of the asphalt mixture, the fine sand layer can increase the contact area with the upper surface layer to improve the interface bonding strength, and can be used as a stress absorption layer to relieve the interface debonding problem to a certain extent.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a quiet road surface structure of long-life. The utility model provides a quiet road surface structure of long-life has effectively solved the environmental factor that the road surface exists of making an uproar now and has moved the poor problem of durability under the loading effect.
The embodiment of the utility model provides a quiet road surface structure of long-life, quiet road surface structure of long-life includes: the semi-rigid base layer 1, the first asphalt bonding layer 2, the mixture lower surface layer 3, the second asphalt bonding layer 4, the mixture middle surface layer 5, the third asphalt bonding layer 6 and the mixture upper surface layer 7 are sequentially arranged from bottom to top;
the semi-rigid base layer 1 is a cement stabilized macadam base layer;
the first asphalt bonding layer 2 is a rubber asphalt stress absorbing layer;
the mixture lower surface layer 3 is an AC-25 coarse grain type asphalt concrete lower surface layer;
the second asphalt bonding layer 4 is an SBS emulsified asphalt bonding layer;
the mixture middle surface layer 5 is a high-modulus anti-fatigue asphalt concrete middle surface layer;
the third asphalt bonding layer 6 is a rubber asphalt mortar bonding layer;
the mixture upper layer 7 is a polyurethane porous elastic mixture upper layer.
The research shows that the types and the laying sequence of the rubber asphalt stress absorbing layer, the AC-25 coarse grain type asphalt concrete lower surface layer, the SBS emulsified asphalt bonding layer, the high-modulus anti-fatigue asphalt concrete middle surface layer, the rubber asphalt mortar bonding layer and the polyurethane porous elastic mixture upper surface layer adopted by the utility model in sequence have synergistic effect on improving the composite performance and durability of each aspect of the pavement structure; the polyurethane porous elastic mixture can provide excellent noise reduction, drainage, deicing and other noise reduction; the rubber asphalt mortar bonding layer has good tensile strength and shear strength, can ensure that the upper surface layer of the polyurethane porous elastic mixture and the surface layer in the high-modulus anti-fatigue asphalt concrete have enough bonding strength, simultaneously reduces the generation of interface stress concentration, and ensures the synergistic effect between the polyurethane porous elastic mixture and the high-modulus anti-fatigue asphalt concrete in the mixture; the high-modulus fatigue-resistant asphalt concrete structure layer has higher strength and rigidity, the fatigue resistance is greatly improved, the serious rutting deformation of the middle and lower surface layers generated under the conditions of high temperature, heavy load and semi-rigid base layer can be resisted, and meanwhile, the higher rigidity can reduce the deformation of the upper surface layer under the action of vehicle load, reduce the shearing stress of the interface layer and relieve the problem of interlayer interface debonding; the rubber asphalt stress absorbing layer can effectively prevent the semi-rigid base layer from reflecting cracks and reduce the occurrence of early diseases of the pavement.
According to the embodiment of the utility model provides a long-life quiet road surface structure, AC-25 coarse grain formula asphalt concrete lower surface course in the high-modulus antifatigue asphalt concrete the surface course with the thickness ratio of the porous elastic mixture upper surface course of polyurethane is 6 ~ 8 cm: 4-6 cm: 3-5 cm.
According to the embodiment of the utility model provides a quiet road surface structure of long-life, it is further preferred, rubber asphalt stress absorbing layer AC-25 coarse grain formula asphalt concrete lower surface course SBS emulsified asphalt tie coat the high-modulus antifatigue asphalt concrete middle surface course rubber asphalt mortar tie coat with the thickness ratio of the porous elastic mixture upper surface course of polyurethane is 6 ~ 8 mm: 6-8 cm: 0.5-0.7 mm: 4-6 cm: 2-3 mm: 3-5 cm.
The utility model discloses in, the direct interact in layer above preferred each layer thickness proportion can better performance each asphalt concrete structure layer and the porous elastic mixture of polyurethane above the adoption especially does benefit to the synergism between the porous elastic mixture of polyurethane and the high-modulus antifatigue asphalt concrete for it is more excellent to fall the road surface structure comprehensive properties of making an uproar.
According to the embodiment of the utility model provides a pair of quiet road surface structure of long-life, SBS emulsified asphalt adhesive linkage thickness is 0.5 ~ 0.7 mm.
According to the embodiment of the utility model provides a long-life quiet road surface structure, high modulus modified asphalt mixture is PRM high modulus agent modified asphalt mixture.
In the utility model, the high modulus modified asphalt mixture adopted by the lower layer of the mixture can further better solve the technical problem that the ruts of the lower layer are seriously deformed; the lower surface layer of the mixture is matched with the rubber asphalt mortar bonding layer, so that the shear stress of the interface layer can be reduced, the shear strength of the interface layer is improved, and the stress concentration of the interface layer is reduced, thereby obtaining better effect of preventing and treating the debonding of the interface between the layers.
The utility model discloses in, the function of making an uproar falls in the damping that can provide the excellence by rubber granule and big void ratio on the porous elastic mixture upper strata of polyurethane. Particularly, the upper layer of the porous elastic mixture is combined with the middle layer of the high-modulus anti-fatigue asphalt concrete for use, so that the running noise is further reduced, and the sound absorption coefficient is higher than 0.9.
According to the utility model provides a pair of quiet road surface structure of long-life, rubber asphalt stress absorbing layer is SAK warm mix agent modified rubber asphalt stress absorbing layer.
In the utility model, the spreading temperature of the rubber asphalt can be reduced by the rubber asphalt stress absorbing layer, thereby achieving the effects of saving energy and improving the working condition of a construction site; moreover, the rubber asphalt stress absorbing layer can effectively prevent reflection cracks of the semi-rigid base layer, ensure the interaction between the cement stabilized macadam semi-rigid base layer and the AC-25 coarse-grained asphalt concrete lower surface layer, and further reduce the occurrence of early diseases of the pavement.
According to the embodiment of the utility model provides a pair of quiet road surface structure of long-life, the thickness on rubber asphalt stress absorbing layer is 6 ~ 8 mm.
According to the utility model provides a pair of quiet road surface structure of long-life, the maximum particle size of rubble is 4.75mm in the rubber asphalt stress absorbing layer.
According to the embodiment of the utility model provides a pair of quiet road surface structure of long-life, the thickness of rubber asphalt mortar tie coat is 2 ~ 3 mm.
The utility model provides a long-life quiet pavement structure, because the existing porous elastic pavement still has the problems of poor durability, low engineering economic benefit and the like under the action of environmental factors and driving load, and the optimized structure layer of the utility model can better solve the problems of debonding between the porous elastic mixture surface layer and the lower bearing layer and early damage; particularly, by adopting the thicknesses of the surface layers and the bonding layers, the anti-fatigue and anti-rutting performances of the middle and lower surface layers can be improved, the deformation of the upper surface layer under the vehicle-mounted action can be effectively controlled, the shearing stress of the interface layer is reduced, the shearing strength of the interface layer is improved, and the stress concentration of the interface layer is reduced, so that the better effect of preventing and treating the debonding of the interface between the layers is obtained, and the functions of each layer are better exerted. Meanwhile, the whole thickness of the surface layer structure can be reduced, and the purposes of reducing the road surface manufacturing cost and improving the structure and functional durability are achieved.
The embodiment of the utility model provides a quiet road surface structure of long-life, include: the thickness of the rubber asphalt stress absorbing layer is 6.5-7.5 mm, the thickness of the AC-25 coarse grain type asphalt concrete lower surface layer is 6.5-7.5 cm, and the thickness of the SBS emulsified asphalt bonding layer is 0.55-0.65 mm; the thickness of the surface layer in the high-modulus anti-fatigue asphalt concrete is 4.5-5.5 cm, the thickness of the rubber asphalt mortar bonding layer is 2.3-2.8 mm, and the thickness of the upper surface layer of the polyurethane porous elastic mixture is 3.5-4.5 cm.
According to the embodiment of the utility model provides a long-life quiet road surface structure, the thickness of rubber asphalt stress absorbing layer is 7mm, the thickness of AC-25 coarse grain formula asphalt concrete lower surface course is 7cm, the thickness of SBS emulsified asphalt tie coat is 0.6mm, the thickness of high-modulus antifatigue asphalt concrete middle surface course is 5cm, the thickness of rubber asphalt mortar tie coat is 2.5mm, the thickness of the porous elastic mixture upper strata of polyurethane is 4 cm.
The utility model discloses through the research discovery, each layer of long-life quiet road surface structure adopts the above-mentioned preferred thickness can be better each layer of performance interact, and the comprehensive effect such as each mechanical properties of road surface, performance and durability is best when this road surface structure further reduces the whole thickness of surface course structure.
The beneficial effects of the utility model reside in at least: the utility model provides a long-life quiet road surface structure, adopted the laying structure type of "polyurethane porous elastic mixture upper strata + rubber asphalt mortar tie coat + high-modulus antifatigue asphalt concrete in surface course + SBS emulsified asphalt tie coat + AC-25 coarse grain formula asphalt concrete lower surface course + rubber asphalt stress absorbing layer + semi-rigid basic unit", through adopting the mode of optimizing structural layer type and laying thickness, solve porous elastic mixture surface course and lower cushion layer debond, take place the problem of early damage, this road surface structure possesses the drainage, the deicing, fall and make an uproar etc. and fall, can effectively prolong functional layer structure life, reduce the whole thickness of surface course structure simultaneously, realize reducing road surface cost, promote the purpose of structure and functional durability.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a long-life quiet road provided by an embodiment of the present invention.
Reference numerals are as follows:
1: a semi-rigid base layer; 2: a first asphalt bond coat; 3: a lower layer of the mixture;
4: a second asphalt bond coat; 5: a middle layer of the mixture; 6: a third asphalt bond coat;
7: and (5) coating the mixture.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The examples do not specify particular techniques or conditions, and are to be construed in accordance with the description of the art in the literature or with the specification of the product. The instruments and the like are conventional products which are purchased by normal distributors and are not indicated by manufacturers. The process is conventional unless otherwise specified, and the starting materials are commercially available from a public source. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications.
The utility model discloses in following example, used one-component polyurethane specifically is conventional moisture cure type polyurethane gluing agent, and the principal ingredients is end isocyanate group prepolymer. The gradation of the aggregate adopted in the upper layer of the polyurethane porous elastic mixture is shown in the table 1, the mixing amount of the rubber particles is 25%, all stones with the grain diameter of 1.18 mm-2.36 mm are replaced by an isovolumetric replacement method, the actual measured void ratio is 23.1%, the stability is 27.8kN, and the scattering loss rate is 6.7%.
TABLE 1 grading of the aggregates of the upper layer of the polyurethane cellular elastic mixture
According to some embodiments of the utility model, the long-life quiet pavement structure designed by the utility model can effectively reduce noise, and has good drainage and self-stress deicing functions; furthermore, considering the weak bonding property between the polyurethane porous elastic pavement and the lower bearing layer, the stripping phenomenon is very easy to occur between the surface layers under the action of long-time driving load and pavement water; further, under the action of a driving load, a main shear stress peak value of a pavement structure under the semi-rigid base condition appears on a middle lower layer of the pavement, and the accumulation of unrecoverable plastic deformation can be generated under the action of vehicle load due to insufficient shear strength to form a pavement track disease; furthermore, according to the general rule of standard, safety, reliability, economy and reasonability, the AC-25 coarse grain type asphalt concrete lower surface layer, the high-modulus anti-fatigue asphalt mixture middle surface layer and the polyurethane porous elastic mixture upper surface layer need to be set to be reasonable in thickness, so that the functional requirement and the economic requirement can be met.
According to the long-life quiet pavement structure provided by the embodiment of the utility model, the pavement layer in the pavement structure is made of high-strength and anti-rutting high-modulus anti-fatigue asphalt concrete, so that the structural requirement of the pavement is met; furthermore, the combination surface layer adopts a polyurethane porous elastic pavement, so that the functional requirement of the pavement is met, the noise pollution is greatly reduced, and the driving safety in rainy days and winter is improved; furthermore, the pavement is paved in three layers, the thickness of the polyurethane porous elastic pavement serving as a surface layer is 3-5 cm, the thickness of the high-modulus anti-fatigue asphalt concrete serving as a middle surface layer is 4-6 cm, and the thickness of the AC-25 coarse grain type asphalt concrete serving as a lower surface layer is 6-8 cm, so that the overall thickness of the pavement structure is reduced, and the construction cost is saved; furthermore, a rubber asphalt mortar bonding layer is arranged between the upper surface layer of the polyurethane porous elastic pavement and the surface layer of the high-modulus anti-fatigue asphalt concrete, and deformation coordination among layers is ensured by virtue of the cohesiveness and the stress absorption capacity of the rubber asphalt mortar and the anti-deformation capacity of the high-modulus concrete, so that the problem of interface debonding is prevented; furthermore, a rubber asphalt stress absorbing layer is arranged between the semi-rigid base layer and the AC-25 coarse grain type asphalt concrete lower surface layer, so that reflection cracks of the semi-rigid base layer can be effectively prevented, and early diseases of the pavement can be reduced.
Some specific embodiments of the utility model provide a long-life quiet road surface structure, including semi-rigid base layer 1, first pitch tie coat 2, mixture lower surface course 3, second pitch tie coat 4, mixture middle surface course 5, third pitch tie coat 6 and mixture upper surface course 7 that set gradually from bottom to top; the semi-rigid base layer 1 is a cement stabilized macadam base layer; the first asphalt bonding layer 2 is a rubber asphalt stress absorbing layer; the mixture lower surface layer 3 is an AC-25 coarse grain type asphalt concrete lower surface layer; the second asphalt bonding layer 4 is an SBS emulsified asphalt bonding layer; the mixture middle surface layer 5 is a high-modulus anti-fatigue asphalt concrete middle surface layer; the third asphalt bonding layer 6 is a rubber asphalt mortar bonding layer; the mixture upper layer 7 is a polyurethane porous elastic mixture upper layer. Preferably, the thickness of the SBS emulsified asphalt bonding layer is 0.5-0.7 mm. Preferably, the thickness of the rubber asphalt stress absorption layer is 6-8 mm. Preferably, the thickness ratio of the AC-25 coarse grain type asphalt concrete lower surface layer to the high-modulus fatigue-resistant asphalt concrete middle surface layer to the polyurethane porous elastic mixture upper surface layer is 6-8 cm: 4-6 cm: 3-5 cm. The thickness ratio of the rubber asphalt stress absorbing layer to the AC-25 coarse grain asphalt concrete lower surface layer to the SBS emulsified asphalt bonding layer to the high-modulus anti-fatigue asphalt concrete middle surface layer to the rubber asphalt mortar bonding layer to the polyurethane porous elastic mixture upper surface layer is 6-8 mm: 6-8 cm: 0.5-0.7 mm: 4-6 cm: 2-3 mm: 3-5 cm. Preferably, the maximum particle size of the crushed stone in the rubber asphalt stress absorption layer is 4.75 mm. Preferably, the thickness of the rubber asphalt stress absorption layer is 6.5-7.5 mm, the thickness of the AC-25 coarse-grained asphalt concrete lower surface layer is 6.5-7.5 cm, and the thickness of the SBS emulsified asphalt bonding layer is 0.55-0.65 mm; the thickness of the surface layer in the high-modulus anti-fatigue asphalt concrete is 4.5-5.5 cm, the thickness of the rubber asphalt mortar bonding layer is 2.3-2.8 mm, and the thickness of the upper surface layer of the polyurethane porous elastic mixture is 3.5-4.5 cm. More preferably, the thickness of the rubber asphalt stress absorbing layer is 7mm, the thickness of the AC-25 coarse grain type asphalt concrete lower surface layer is 7cm, the thickness of the SBS emulsified asphalt bonding layer is 0.6mm, the thickness of the high-modulus anti-fatigue asphalt concrete middle surface layer is 5cm, the thickness of the rubber asphalt mortar bonding layer is 2.5mm, and the thickness of the polyurethane porous elastic mixture upper surface layer is 4 cm.
Example 1
The present embodiment provides a long-life quiet road surface structure including, as shown in fig. 1: the semi-rigid base layer 1, the first asphalt bonding layer 2, the mixture lower surface layer 3, the second asphalt bonding layer 4, the mixture middle surface layer 5, the third asphalt bonding layer 6 and the mixture upper surface layer 7 are sequentially arranged from bottom to top; the semi-rigid base layer 1 is a cement stabilized macadam base layer; the first asphalt bonding layer 2 is a rubber asphalt stress absorbing layer; the mixture lower surface layer 3 is an AC-25 coarse grain type asphalt concrete lower surface layer; the second asphalt bonding layer 4 is an SBS emulsified asphalt bonding layer; the mixture middle surface layer 5 is a high-modulus anti-fatigue asphalt concrete middle surface layer; the third asphalt bonding layer 6 is a rubber asphalt mortar bonding layer; the mixture upper layer 7 is a polyurethane porous elastic mixture upper layer.
The long-life quiet road surface concrete structure among this embodiment: the cement stabilized macadam base layer, the rubber asphalt stress absorption layer, the AC-25 coarse grain type asphalt concrete lower surface layer, the SBS emulsified asphalt bonding layer, the high-modulus anti-fatigue asphalt concrete middle surface layer, the rubber asphalt mortar bonding layer and the polyurethane porous elastic mixture upper surface layer are sequentially arranged from bottom to top. The cement-stabilized macadam base layer is 36cm thick cement-stabilized macadam, the rubber asphalt stress absorbing layer is 7mm thick, the AC-25 coarse grain type asphalt concrete lower surface layer is 7cm thick, the SBS emulsified asphalt bonding layer spreading amount is 0.6mm thick, the high-modulus anti-fatigue asphalt concrete middle surface layer is 5cm thick, the rubber asphalt mortar bonding layer is 2.5mm thick, and the polyurethane porous elastic mixture upper surface layer is 4cm thick.
The middle surface layer of the high-modulus anti-fatigue asphalt concrete is obtained by doping a PRM high-modulus modified asphalt mixture with lignin fiber; wherein the mass ratio of the PRM high-modulus modified asphalt mixture to the lignin fiber is 1000: 3; the PRM high-modulus modified asphalt mixture is obtained by doping a French PRM high-modulus agent into an asphalt mixture, and the mass ratio of the asphalt mixture to the high-modulus agent is 25: 3.
The upper layer of the polyurethane porous elastic mixture is formed by mixing a single-component polyurethane serving as a binding material, rubber particles and aggregates according to a mass ratio of 5.1:12:76, the initial curing time of the single-component polyurethane binding material is more than or equal to 2.5 hours, and the final curing time is less than or equal to 48 hours.
The rubber asphalt mortar bonding layer is formed by mixing rubber asphalt, mineral powder and fine materials according to the mass ratio of 1.0:1.0:2.0, wherein the rubber asphalt is SBS modified asphalt and 60-80-mesh rubber powder according to the mass ratio of 4: 1.
In the rubber asphalt stress absorbing layer, the mass ratio of rubber asphalt to macadam is 2: 18, firstly spreading the rubber asphalt with the spreading amount of 2kg/m 2 Spreading the crushed stone while the crushed stone is hot, wherein the maximum particle size of the crushed stone is 4.75mm, and the spreading amount is 18kg/m 2 . Wherein the asphalt is SAK warm mixing agent modified rubber asphalt, and the mixing amount of the SAK warm mixing agent is 2 percent.
In the long-life quiet road surface structure in this embodiment, each technical index all satisfies and is superior to the operation requirement of road surface structure, and specific testing result is shown in table 1 below:
table 1 specific test results of example 1
Comparative example 1
This comparative example adopts conventional road surface structure as the lower layer that holds of porous elasticity road surface, and the concrete design is: 4cm of polyurethane porous elastic mixture, 2.5mm of SBS emulsified asphalt bonding layer and 6cm of AC-20 medium-grain modified asphalt mixture.
Adopt composite construction fatigue test to compare the utility model discloses well embodiment 1's last well surface course composite construction (the porous elastic mixture of 4cm polyurethane +2.5mm rubber asphalt mortar tie coat +5cm high-modulus antifatigue asphalt concrete) and comparative example 1 composite construction's fatigue durability, the test result shows to adopt the utility model discloses embodiment 1's fatigue resistance can the advantage obvious, and the concrete test result is shown below table 2.
TABLE 2 fatigue test results of different surface layer structure combinations
By the concrete implementation scheme that above-mentioned this embodiment provided, can see out, the utility model discloses the new laying structure of application has compromise the structural and functional requirement on road surface. Under the condition of a semi-rigid base layer, the rubber asphalt stress absorbing layer and the high-modulus anti-fatigue asphalt concrete middle surface layer are arranged, so that ruts and reflection cracks can be effectively resisted, and the polyurethane porous elastic mixture adopted by the surface layer effectively ensures that the pavement structure provides excellent noise reduction, drainage and deicing functional performances. Meanwhile, the use of the rubber asphalt mortar bonding material enhances the bonding property between the upper surface layer of the polyurethane porous elastic mixture and the surface layer in the high-modulus anti-fatigue asphalt concrete, ensures the deformation coordination between the upper surface layer and the lower surface layer, and effectively relieves the stress concentration between layers. In addition, the high-temperature stability, the low-temperature crack resistance and the durability of the pavement structure are obviously superior to those of the traditional pavement structure, and the cost of maintenance is low, so that the pavement structure is excellent in the whole-period economy, and has a wide application prospect in newly-built municipal roads and highways.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A long-life quiet road surface structure, comprising: the semi-rigid asphalt pavement structure comprises a semi-rigid base layer (1), a first asphalt bonding layer (2), a mixture lower surface layer (3), a second asphalt bonding layer (4), a mixture middle surface layer (5), a third asphalt bonding layer (6) and a mixture upper surface layer (7) which are arranged from bottom to top in sequence;
the semi-rigid base layer (1) is a cement stabilized macadam base layer;
the first asphalt bonding layer (2) is a rubber asphalt stress absorbing layer;
the mixture lower surface layer (3) is an AC-25 coarse-grained asphalt concrete lower surface layer;
the second asphalt bonding layer (4) is an SBS emulsified asphalt bonding layer;
the mixture middle surface layer (5) is a high-modulus anti-fatigue asphalt concrete middle surface layer;
the third asphalt bonding layer (6) is a rubber asphalt mortar bonding layer;
the mixture upper surface layer (7) is a polyurethane porous elastic mixture upper surface layer.
2. The long-life quiet pavement structure of claim 1, wherein the thickness ratio of the AC-25 coarse-grained asphalt concrete lower surface layer, the high-modulus fatigue-resistant asphalt concrete middle surface layer and the polyurethane porous elastic mixture upper surface layer is 6-8 cm: 4-6 cm: 3-5 cm.
3. The long-life quiet pavement structure of claim 2, wherein the rubber asphalt stress absorbing layer, the AC-25 coarse grained asphalt concrete lower surface layer, the SBS emulsified asphalt bonding layer, the high modulus fatigue resistant asphalt concrete middle surface layer, the rubber asphalt mortar bonding layer, and the polyurethane porous elastic mix upper surface layer have a thickness ratio of 6-8 mm: 6-8 cm: 0.5-0.7 mm: 4-6 cm: 2-3 mm: 3-5 cm.
4. The long-life quiet pavement structure of claim 1, wherein the thickness of the SBS emulsified asphalt bonding layer is 0.5-0.7 mm.
5. The long-life quiet road surface structure of claim 1, wherein said rubberized asphalt stress absorbing layer has a thickness of 6 to 8 mm.
6. The long-life quiet road surface structure of claim 1, wherein the rubber asphalt mortar bond layer has a thickness of 2 to 3 mm.
7. A long-life quiet pavement structure as claimed in any one of claims 1 to 6, wherein said rubber asphalt stress absorbing layer has a thickness of 6.5 to 7.5mm, said AC-25 coarse grained asphalt concrete lower surface layer has a thickness of 6.5 to 7.5cm, and said SBS emulsified asphalt bonding layer has a thickness of 0.55 to 0.65 mm; the thickness of the surface layer in the high-modulus anti-fatigue asphalt concrete is 4.5-5.5 cm, the thickness of the rubber asphalt mortar bonding layer is 2.3-2.8 mm, and the thickness of the upper surface layer of the polyurethane porous elastic mixture is 3.5-4.5 cm.
8. The long-life quiet pavement structure of claim 7, wherein the rubberized asphalt stress absorbing layer has a thickness of 7mm, the AC-25 coarse-grained asphalt concrete lower layer has a thickness of 7cm, the SBS emulsified asphalt bonding layer has a thickness of 0.6mm, the high-modulus fatigue-resistant asphalt concrete middle layer has a thickness of 5cm, the rubberized asphalt mortar bonding layer has a thickness of 2.5mm, and the polyurethane porous elastic mix upper layer has a thickness of 4 cm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116240767A (en) * | 2023-02-20 | 2023-06-09 | 山东省交通科学研究院 | Single-component polyurethane tunnel pavement structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116240767A (en) * | 2023-02-20 | 2023-06-09 | 山东省交通科学研究院 | Single-component polyurethane tunnel pavement structure |
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