CN215714344U - Self-adhesive anti-cracking composite pavement structure - Google Patents
Self-adhesive anti-cracking composite pavement structure Download PDFInfo
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- CN215714344U CN215714344U CN202121703797.3U CN202121703797U CN215714344U CN 215714344 U CN215714344 U CN 215714344U CN 202121703797 U CN202121703797 U CN 202121703797U CN 215714344 U CN215714344 U CN 215714344U
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Abstract
The utility model discloses a self-adhesive anti-cracking composite pavement structure, which belongs to the technical field of road engineering and comprises an underlayer, a base layer, a self-adhesive fiber layer and a surface layer which are sequentially laid from bottom to top, wherein the surface layer sequentially comprises a lower surface layer, a middle surface layer and an upper surface layer from bottom to top, and the upper part and the lower part of the self-adhesive fiber layer are respectively bonded with the lower surface layer and the base layer. According to the utility model, the self-adhesive fiber layer is added between the surface layer and the subbase layer to form a stress dispersion structure, so that the stress of cracks generated on the base layer or the surface layer is dispersed, and the crack extension speed is relieved; meanwhile, the lower surface layer adopts fiber reinforced asphalt concrete to enhance the crack resistance of the asphalt concrete pavement, the polyester glass fiber cloth layer can effectively eliminate stress concentration of pavement cracks, the crack production is delayed, and meanwhile, the polyester glass fiber cloth layer has the advantages of high temperature resistance and good waterproof performance, can prevent moisture permeation, avoids damage to a base layer due to the moisture permeation, and prolongs the service life of the asphalt pavement.
Description
Technical Field
The utility model belongs to the technical field of road engineering, and particularly relates to a self-adhesive anti-cracking composite pavement structure.
Background
With the high-speed development of highway industry, asphalt pavement has gradually developed into the main pavement structure form of high-grade highway due to the advantages of good driving comfort, convenient maintenance and repair and the like. In recent years, the traffic volume is rapidly increased, the phenomena of vehicle upsizing, overloading and canalization are increasingly prominent, and higher requirements are put forward on the technical performance of the asphalt pavement material.
At present, because bituminous paving exposes in the external environment for a long time, it is comparatively serious to receive the external environment influence, when its high temperature or cross when low excessively, the road surface can take place expend with heat and contract with cold and lead to its road surface layer to take place the fracture to reduce its life. Research provides a novel pavement structure for slowing down early diseases of asphalt pavements, and the pavement structure becomes one of key problems in highway construction and maintenance at the present stage.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a self-adhesive anti-cracking composite pavement structure and aims to solve the technical problem of poor crack resistance of an asphalt pavement in the prior art.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
the utility model provides an anti compound pavement structure that ftractures of self-adhesive formula, includes subbase, basic unit, self-adhesive fiber layer and the surface course of laying in proper order from bottom to top, the surface course includes surface course, well surface course and top layer down in proper order from bottom to top, surface course and basic unit under the upper and lower bonding of self-adhesive fiber layer respectively.
Preferably, the self-adhesive fiber layer includes first compound modified emulsified asphalt layer of fibre reinforcing, the fine cloth layer of polyester glass and the compound modified emulsified asphalt layer of second fibre reinforcing from last to down in proper order, the lower floor bonds on first compound modified emulsified asphalt layer of fibre reinforcing, the compound modified emulsified asphalt layer of second fibre reinforcing bonds on the basic unit.
Preferably, the first fiber-reinforced composite modified emulsified asphalt layer and the second fiber-reinforced composite modified emulsified asphalt layer both adopt emulsified asphalt added with reinforcing fibers, and the reinforcing fibers are basalt fibers, alkali-free glass fibers, high-strength glass fibers or surface-treated glass fibers; the addition amount of the reinforcing fiber is 0.3-10%.
Preferably, the dosage of the first fiber reinforced composite modified emulsified asphalt layer is not more than 0.32kg/m 2.
Preferably, the second fiber reinforced composite modified emulsified asphalt layer is not more than 0.32kg/m 2.
Preferably, the thickness of the self-adhesive fiber layer is 1.5-2.0 mm.
Preferably, the lower surface layer is made of fiber reinforced asphalt concrete, and the middle surface layer and the upper surface layer are both made of asphalt concrete.
Preferably, the fiber reinforced asphalt concrete is asphalt concrete added with fibers, and the fibers are basalt fibers and/or carbon fibers; the addition amount of the fiber is 0.3-10%.
Preferably, the subbase layer is graded macadam; the base layer is a water-stable layer.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the self-adhesive fiber layer is additionally arranged between the surface layer and the underlayer to form the stress dispersion structure, so that the stress of the crack generated by the base layer or the surface layer is dispersed, and the crack extension speed is relieved; meanwhile, the lower surface layer adopts fiber reinforced asphalt concrete to enhance the crack resistance of the asphalt concrete pavement, the polyester glass fiber cloth layer can effectively eliminate stress concentration of pavement cracks, the crack production is delayed, and meanwhile, the polyester glass fiber cloth layer has the advantages of high temperature resistance and good waterproof performance, can prevent moisture permeation, avoids damage to a base layer due to the moisture permeation, and prolongs the service life of the asphalt pavement.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of a self-adhesive crack-resistant composite pavement structure according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the self-adhesive fibrous layer of FIG. 1;
in the figure: 0-underlayer, 1-underlayer, 2-self-adhesive fiber layer, 21-first fiber reinforced composite modified emulsified asphalt layer, 22-polyester glass fiber cloth layer, 23-second fiber reinforced composite modified emulsified asphalt layer; 3-surface layer, 4-middle surface layer and 5-upper surface layer.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the self-adhesive anti-cracking composite pavement structure provided by the utility model comprises an underlayer 0, a base layer 1, a self-adhesive fiber layer 2 and a surface layer which are sequentially laid from bottom to top, wherein the surface layer sequentially comprises a lower surface layer 3, a middle surface layer 4 and an upper surface layer 5 from bottom to top, and the upper part and the lower part of the self-adhesive fiber layer 2 are respectively bonded with the lower surface layer 3 and the base layer 1. Wherein, the subbase layer 0 is graded macadam; the base layer 1 is a water-stable layer. The self-adhesive fiber layer between the base layer and the lower layer is used to form a stress dispersion structure to disperse the stress of the crack generated by the base layer or the surface layer and relieve the crack extension speed.
In an embodiment of the present invention, as shown in fig. 2, the self-adhesive fiber layer 2 sequentially includes, from top to bottom, a first fiber-reinforced composite modified emulsified asphalt layer 21, a polyester fiberglass cloth layer 22, and a second fiber-reinforced composite modified emulsified asphalt layer 23, the lower layer 3 is bonded to the first fiber-reinforced composite modified emulsified asphalt layer 21, and the second fiber-reinforced composite modified emulsified asphalt layer 23 is bonded to the base layer 1. The first fiber-reinforced composite modified emulsified asphalt layer 21 and the second fiber-reinforced composite modified emulsified asphalt layer 23 both adopt emulsified asphalt added with reinforcing fibers, and the reinforcing fibers are basalt fibers, alkali-free glass fibers, high-strength glass fibers or surface-treated glass fibers. During construction, the addition amount of the reinforcing fiber is not less than 0.3 percent, and can be increased according to actual needs, and is not more than 10 percent at most.
In one embodiment of the present invention, as shown in fig. 1 and 2, the lower surface layer 3 is made of fiber reinforced asphalt concrete, and the middle surface layer 4 and the upper surface layer 5 are both made of asphalt concrete. The fiber reinforced asphalt concrete is asphalt concrete added with fibers, and the fibers are basalt fibers and/or carbon fibers. In the same way, the addition amount of the fiber is not less than 0.3 percent during construction, and can be increased according to actual requirements, and the maximum addition amount is not more than 10 percent. The lower surface layer paved by the fiber reinforced asphalt concrete can effectively improve the tensile strength of the asphalt concrete pavement, thereby enhancing the crack resistance of the asphalt concrete pavement and prolonging the service life of the asphalt pavement. Meanwhile, the asphalt in the lower layer and the first fiber reinforced composite modified emulsified asphalt layer are mutually permeated, so that the binding power is improved; and the first fiber reinforced composite modified emulsified asphalt layer can disperse the stress of the crack to a certain degree, delay the generation and the expansion of the crack and play a role in crack resistance.
During the specific construction, the thickness of the self-adhesive fiber layer 2 is 1.5-2.0 mm; the dosage of the first fiber reinforced composite modified emulsified asphalt layer 21 is not more than 0.32kg/m2The dosage of the second fiber reinforced composite modified emulsified asphalt layer 23 is not more than 0.32kg/m2。
As an optimal structure, the polyester glass fiber cloth layer 22 in the middle of the self-adhesive fiber layer 2 is formed by laying polyester glass fiber cloth, and the polyester glass fiber cloth has lower elongation and instantaneous tensile strength, effectively eliminates stress concentration of pavement cracks, and delays the generation of cracks; in addition, the polyester glass fiber cloth has the characteristics of high temperature resistance and good waterproof performance, does not deform, wrinkle or stretch and deform under a high-temperature construction environment, and can effectively prevent moisture permeation and avoid damage to a base layer caused by moisture permeation.
In conclusion, the utility model has the advantages of simple structure and good anti-cracking effect, and the tensile strength of the asphalt concrete pavement is improved by utilizing the lower surface layer paved by the fiber reinforced asphalt concrete; the self-adhesive fiber layer can disperse the stress of cracks generated by the base layer or the surface layer and can prevent moisture from permeating; the bonding force between the lower surface layer and the self-adhesive fiber layer is adopted to improve the overall stability of the roadbed and pavement structure, delay the generation and the expansion of cracks and have obvious crack resistance effect. The utility model is beneficial to improving the crack resistance of the asphalt pavement, and is particularly suitable for high-grade highways with heavy traffic.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and thus the present invention is not limited to the specific embodiments disclosed above.
Claims (9)
1. The utility model provides an anti compound road surface structure that ftractures of self-adhesive formula which characterized in that: including subbase, basic unit, self-adhesive fiber layer and the surface course of laying in proper order from bottom to top, the surface course includes surface course, well surface course and top layer down in proper order from bottom to top, surface course and basic unit under the upper and lower bonding respectively of self-adhesive fiber layer.
2. The self-adhesive crack-resistant composite pavement structure of claim 1, characterized in that: self-adhesive fiber layer includes first compound modified emulsified asphalt layer of fibre reinforcement, the fine cloth layer of polyester glass and the compound modified emulsified asphalt layer of second fibre reinforcement from last to down in proper order, the lower floor bonds on the compound modified emulsified asphalt layer of first fibre reinforcement, the compound modified emulsified asphalt layer of second fibre reinforcement bonds on the basic unit.
3. The self-adhesive crack-resistant composite pavement structure of claim 2, characterized in that: the first fiber-reinforced composite modified emulsified asphalt layer and the second fiber-reinforced composite modified emulsified asphalt layer both adopt emulsified asphalt added with reinforcing fibers, and the reinforcing fibers are basalt fibers, alkali-free glass fibers, high-strength glass fibers or surface-treated glass fibers.
4. The self-adhesive crack-resistant composite pavement structure of claim 3, characterized in that: the first fiberThe dosage of the reinforced composite modified emulsified asphalt layer is not more than 0.32kg/m2。
5. The self-adhesive crack-resistant composite pavement structure of claim 3, characterized in that: the dosage of the second fiber reinforced composite modified emulsified asphalt layer is not more than 0.32kg/m2。
6. The self-adhesive crack-resistant composite pavement structure of claim 2, characterized in that: the thickness of the self-adhesive fiber layer is 1.5-2.0 mm.
7. The self-adhesive crack-resistant composite pavement structure of claim 1, characterized in that: the lower surface layer is made of fiber reinforced asphalt concrete, and the middle surface layer and the upper surface layer are both made of asphalt concrete.
8. The self-adhesive, crack-resistant composite pavement structure according to any of claims 1 to 7, characterized in that: the subbase layer is graded broken stone.
9. The self-adhesive, crack-resistant composite pavement structure of claim 8, characterized in that: the base layer is a water-stable layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121703797.3U CN215714344U (en) | 2021-07-26 | 2021-07-26 | Self-adhesive anti-cracking composite pavement structure |
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| CN202121703797.3U CN215714344U (en) | 2021-07-26 | 2021-07-26 | Self-adhesive anti-cracking composite pavement structure |
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| CN202121703797.3U Active CN215714344U (en) | 2021-07-26 | 2021-07-26 | Self-adhesive anti-cracking composite pavement structure |
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- 2021-07-26 CN CN202121703797.3U patent/CN215714344U/en active Active
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