CN107227668B - Fiber asphalt concrete pavement and construction method thereof - Google Patents
Fiber asphalt concrete pavement and construction method thereof Download PDFInfo
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- CN107227668B CN107227668B CN201710651360.1A CN201710651360A CN107227668B CN 107227668 B CN107227668 B CN 107227668B CN 201710651360 A CN201710651360 A CN 201710651360A CN 107227668 B CN107227668 B CN 107227668B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention discloses a fiber asphalt concrete pavement which comprises a lower bearing layer, a penetrating layer sprayed on the upper surface of the lower bearing layer, a bonding layer sprayed on the upper surface of the penetrating layer, a lower fiber layer paved on the upper surface of the bonding layer, an asphalt concrete layer paved on the upper surface of the lower fiber layer and an upper fiber layer paved on the upper surface of the asphalt concrete layer, wherein the upper fiber layer, the lower fiber layer and the asphalt concrete layer are tightly combined. The fiber asphalt concrete pavement effectively solves the problem of difficult mixing of fiber concrete, and promotes the application of the fiber asphalt concrete in actual road engineering. The invention also discloses a construction method of the fiber asphalt concrete pavement, and the fiber asphalt concrete pavement has the same beneficial effects as the above.
Description
Technical Field
The invention relates to the technical field of traffic pavement construction, in particular to a fiber asphalt concrete pavement and a construction method thereof.
Background
Early damage to asphalt pavement is diverse and complex, especially with cracking and rutting damage being the most severe. With the rapid increase of traffic in China, heavy traffic and overload phenomena are increasingly serious, so that asphalt concrete cracking and rutting problems are more serious, and the service quality of roads is seriously reduced. Therefore, how to prevent and treat early cracking and rutting of asphalt pavement is a very troublesome problem.
Experimental data show that the fiber is doped in the asphalt concrete, so that the high-temperature stability of the asphalt concrete can be effectively improved, and the cracking resistance of the asphalt concrete is improved, so that the asphalt concrete has great significance in preventing and controlling cracking and rutting of asphalt pavement.
At present, the mixing mode of the fiber asphalt concrete mainly comprises the steps of putting the fiber and the asphalt concrete into a machine for stirring together, and the mixing mode has the problem of difficulty in uniform mixing. This results in that the fiber asphalt concrete is difficult to popularize and apply in actual road engineering.
Therefore, how to solve the problem of difficult mixing of fiber concrete is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a fiber asphalt concrete pavement and a construction method thereof, which effectively solve the problem of difficult mixing of fiber concrete.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a fibre asphalt concrete road surface, includes the lower layer of bearing, spray in the penetrating layer of lower layer upper surface, spray in the viscose layer of penetrating layer upper surface, the tiling in lower floor's fibre layer of viscose layer upper surface, tiling in asphalt concrete layer of lower floor's fibre layer upper surface, tiling in upper fibre layer of asphalt concrete layer upper surface, upper fibre layer lower floor's fibre layer with asphalt concrete layer closely combines.
Preferably, the upper fiber layer is a synthetic fiber layer, a steel fiber layer or a carbon fiber layer;
the lower fiber layer is a synthetic fiber layer, a steel fiber layer or a carbon fiber layer.
Preferably, the upper fiber layer and the lower fiber layer are fiber layers with tensile strength of more than 500MPa, melting point of more than 220 ℃, rust resistance and corrosion resistance.
Preferably, the upper fiber layer is a fiber layer with the fiber length of 10 mm-15 mm and the fiber equivalent diameter of 0.18 mm-0.24 mm;
the lower fiber layer is a fiber layer with the fiber length of 25-40 mm and the fiber equivalent diameter of 0.3-1.0 mm.
Preferably, the spreading amount m of the upper fiber layer and the lower fiber layer is calculated by the formula(unit: kg/m) 2 ) It is determined that the number of the cells,
wherein: n=a t /A s ，
D is the equivalent diameter of the fiber,
l is the length of the fiber and is the length of the fiber,
n is the number of spread fibers,
A t the fiber spreading area is 0.25m 2 -0.5m 2 ，
A s Tiling equivalent area for fiber, A s ＝D×L。
Preferably, the thickness of the asphalt concrete layer is 40 mm-60 mm.
The invention also provides a construction method of the fiber asphalt concrete pavement, which comprises the following steps:
spraying penetrating layer oil on the upper surface of the lower bearing layer to form a penetrating layer, and spraying adhesive layer oil on the upper surface of the penetrating layer to form an adhesive layer;
laying lower layer fibers on the upper surface of the adhesive layer to form a lower layer fiber layer, laying asphalt concrete on the upper surface of the lower layer fiber layer to form an asphalt concrete layer, and laying upper layer fibers on the upper surface of the asphalt concrete layer to form an upper layer fiber layer;
and rolling the upper surface of the upper fiber layer to tightly combine the upper fiber layer, the lower fiber layer and the asphalt concrete layer.
Preferably, before the upper surface of the lower bearing layer is sprayed with the penetrating layer oil to form the penetrating layer, the method further comprises the following steps: and cleaning and drying the newly built lower bearing layer, and reinforcing the old lower bearing layer.
Preferably, before the lower layer fiber is paved on the upper surface of the adhesive layer to form the lower layer fiber layer, a fiber spreading device is arranged at the front end and the rear end of the asphalt spreader.
Preferably, the fiber asphalt concrete pavement of the construction section is maintained after rolling the upper surface of the upper fiber layer.
The fiber asphalt concrete pavement provided by the invention comprises a lower bearing layer, a penetrating layer, an adhesive layer, a lower fiber layer, an asphalt concrete layer and an upper fiber layer, wherein the lower bearing layer is positioned at the bottommost layer and is a base layer, and the upper surface of the lower bearing layer is clean and dry and has enough strength. The penetrating layer is sprayed on the upper surface of the lower bearing layer, the adhesive layer is sprayed on the upper surface of the penetrating layer, the lower fiber layer is paved on the upper surface of the adhesive layer, the asphalt concrete layer is paved on the upper surface of the lower fiber layer, namely, penetrating layer oil and adhesive layer oil are sprayed on the upper surface of the lower bearing layer in sequence, the lower fiber layer is paved on the upper surface of the lower bearing layer after penetrating layer oil and adhesive layer oil are sprayed, and the upper fiber layer is paved on the upper surface of the asphalt concrete after paving. The upper fiber layer, the lower fiber layer and the asphalt concrete layer are tightly combined to form the asphalt concrete pavement with double-layer fibers.
The fiber asphalt concrete pavement provided by the invention has the advantages that the lower fiber layer, the asphalt concrete layer and the upper fiber layer are respectively paved, the fibers and the concrete do not need to be mixed, the process is simple, the operation is easy, the problems that the fibers and the concrete are difficult to mix and are not uniformly mixed are avoided, the construction is convenient, the fiber mixing amount is reduced, the cost is reduced, and the tensile strength of the bottom of the asphalt concrete and the rut resistance of the surface are obviously improved; and the application of the fiber asphalt concrete in actual road engineering is promoted.
The invention also provides a construction method of the fiber asphalt concrete pavement, which comprises the following steps: spraying penetrating layer oil on the upper surface of the lower bearing layer to form a penetrating layer, and spraying adhesive layer oil on the upper surface of the penetrating layer to form an adhesive layer; laying lower layer fibers on the upper surface of the clay layer to form a lower layer fiber layer, laying asphalt concrete on the upper surface of the lower layer fiber layer to form an asphalt concrete layer, and laying upper layer fibers on the upper surface of the asphalt concrete layer to form an upper layer fiber layer; and rolling the upper surface of the upper fiber layer to tightly combine the upper fiber layer, the lower fiber layer and the asphalt concrete layer.
Specifically, the construction is as follows: spraying penetrating layer oil and adhesive layer oil on the upper surface of the clean and dry lower bearing layer in sequence, and paving fiber asphalt concrete when the adhesive layer oil reaches a construction standard, wherein the lower layer fiber is paved on the upper surface of the lower bearing layer, and the upper layer fiber is paved on the upper surface of the paved asphalt concrete layer. And rolling and fully compacting the asphalt concrete pavement on the road section where the upper fiber layer, the lower fiber layer and the asphalt concrete layer are paved, so that the fibers are combined with the upper layer and the lower layer of the asphalt concrete to a deeper degree.
According to the construction method of the fiber asphalt concrete pavement, the lower fiber layer, the asphalt concrete layer and the upper fiber layer are respectively tiled, fibers and concrete do not need to be mixed, the working procedure is simple, the operation is easy, the problems that the fibers and the concrete are difficult to mix and are not uniformly mixed are avoided, the construction is convenient, the fiber mixing amount is reduced, the cost is reduced, and the tensile strength of the bottom of the asphalt concrete and the rut resistance of the surface are remarkably improved; and the application of the fiber asphalt concrete in actual road engineering is promoted.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, 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 fiber asphalt pavement according to one embodiment of the present invention;
fig. 2 is a construction schematic diagram of a construction method of a fiber asphalt concrete pavement.
The figures are marked as follows:
1-lower bearing layer, 2-penetrating layer, 3-adhesive layer, 41-lower fiber layer, 42-asphalt concrete layer, 43-upper fiber layer, 5-road roller, 6-asphalt spreader and 7-automatic dump car.
Detailed Description
The core of the invention is to provide a fiber asphalt concrete pavement and a construction method thereof, which effectively solve the problem of difficult mixing of fiber concrete.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a fiber asphalt pavement according to an embodiment of the present invention; fig. 2 is a construction schematic diagram of a construction method of a fiber asphalt concrete pavement.
In one embodiment, the fiber asphalt concrete pavement provided by the invention comprises a lower bearing layer, a transparent layer 2, an adhesive layer 3, a lower fiber layer 41, an asphalt concrete layer 42 and an upper fiber layer 43, wherein the lower bearing layer is the bottommost layer, is a basic layer, and has the advantages of cleaning and drying the upper surface of the lower bearing layer 1 and sufficient strength. The penetrating layer 2 is sprayed on the upper surface of the lower bearing layer 1, the adhesive layer 3 is sprayed on the upper surface of the penetrating layer 2, the lower fiber layer 41 is paved on the upper surface of the adhesive layer 3, the asphalt concrete layer 42 is paved on the upper surface of the lower fiber layer 41, the upper fiber layer 43 is paved on the upper surface of the asphalt concrete layer 42, namely, penetrating layer oil and adhesive layer oil are sprayed on the upper surface of the lower bearing layer 1 in sequence, the lower fiber is paved on the upper surface of the lower bearing layer 1 after penetrating layer oil and adhesive layer oil are sprayed, and the upper fiber is paved on the upper surface of asphalt concrete after paving. The upper fiber layer 43 and the lower fiber layer 41 are tightly combined with the asphalt concrete layer 42 to form the asphalt concrete pavement with double-layer fibers.
The fiber asphalt concrete pavement provided by the invention has the advantages that the lower fiber layer 41, the asphalt concrete layer 42 and the upper fiber layer 43 are respectively tiled, fibers and concrete are not required to be mixed, the process is simple, the operation is easy, the problems that the fibers and the concrete are difficult to mix and are not uniformly mixed are avoided, the construction is convenient, the fiber mixing amount is reduced, the cost is reduced, and the tensile strength of the bottom of the asphalt concrete and the rut resistance of the surface are obviously improved; and the application of the fiber asphalt concrete in actual road engineering is promoted.
The above-mentioned fiber asphalt concrete pavement is only a preferred scheme, and specifically, not limited thereto, the fiber asphalt concrete pavement can be specifically adjusted according to actual needs, so that different embodiments can be obtained, the upper fiber layer 43 can be a synthetic fiber layer, a steel fiber layer or a carbon fiber layer, the lower fiber layer 41 can be a synthetic fiber layer, a steel fiber layer or a carbon fiber layer, and the fibers can be any of synthetic fibers, steel fibers and carbon fibers. The synthetic fibers are steel fibers, carbon fibers or mixed fibers of other fibers.
The fiber layer has higher strength, can play a role in reinforcing the concrete, can improve the strength of the asphalt concrete, and effectively improves the high-temperature stability of the asphalt concrete. The lower layer fiber is mutually combined and embedded with the lower layer asphalt concrete after the asphalt concrete is compacted to form lower layer fiber asphalt concrete, so that the tensile capacity of the lower layer of the asphalt concrete is improved, the cracking of the lower layer of the asphalt concrete is prevented, and the cracking from bottom to top is also prevented. The upper layer fiber is mutually combined and embedded with the upper layer asphalt concrete after the asphalt concrete is compacted to form the upper layer fiber asphalt concrete, so that the high-temperature stability of the asphalt concrete is improved, and the rutting resistance of the asphalt concrete pavement is improved.
Preferably, the upper fiber layer 43 and the lower fiber layer 41 are fiber layers with tensile strength of more than 500MPa, melting point of more than 220 ℃, rust prevention and corrosion resistance, the upper fiber and the lower fiber are not limited to a specific fiber, and the characteristics of tensile strength of more than 500MPa, melting point of more than 220 ℃ and rust prevention and corrosion resistance are only required to be met, namely, the fibers meeting the characteristics are applicable to the upper fiber and the lower fiber.
Based on the specific embodiment, a person skilled in the art can change the fiber asphalt concrete pavement according to different specific occasions, wherein the upper fiber layer 43 is a fiber layer with the fiber length of 10-15 mm and the fiber equivalent diameter of 0.18-0.24 mm, and the upper fiber layer is a fine short fiber; the length is 10 mm-15 mm, the equivalent diameter is 0.18 mm-0.24 mm, and the short and fine fibers are convenient to combine with the upper layer of the asphalt concrete in the compacting process and are embedded into the upper surface layer of the asphalt concrete, so that the high-temperature stability of the asphalt concrete is improved. It will of course be appreciated that the upper layer fiber lengths and equivalent diameter ranges described above are only preferred examples of the invention, and that other lengths may be used.
The lower layer fiber is an elongated fiber, the lower layer fiber layer 41 is a fiber layer with the fiber length of 25-40 mm and the fiber equivalent diameter of 0.3-1.0 mm, and the long and thin fibers are convenient to be tightly combined with the asphalt concrete lower layer in the compacting process, so that the tensile capacity of the asphalt concrete lower layer is improved, and the occurrence of cracks is prevented. It will of course be appreciated that the lower fiber length and equivalent diameter ranges are only preferred examples of the invention, and that other lengths may be used.
It is obvious that the person skilled in the art can make several changes to the above-mentioned specific embodiments according to the specific occasions under the guidance of this idea, and the spreading amount m of the upper fiber layer 43 and the lower fiber layer 41 is calculated by the formulaUnits: kg/m 2 It is determined that the number of the cells,
wherein N=A t /A s ，
D is the equivalent diameter of the fiber,
l is the length of the fiber and is the length of the fiber,
n is the number of spread fibers,
A t the fiber spreading area is 0.25m 2 -0.5m 2 ，
A s Tiling equivalent area for fiber, A s ＝D×L。
The amount of spreading of the upper fiber layer 43 and the lower fiber layer 41 is relatively accurate, the amount is relatively reasonable, the range of spreading is only a preferred range of the invention, and other spreading amounts can be used.
It should be noted that the fiber asphalt pavement provided by the present invention should not be limited to this case, and the thickness of the asphalt layer 42 is any value between 40mm and 60mm, including the end point value, such as 50mm, and the specific thickness may be selected according to practical engineering, and it is understood that the above range of asphalt thickness is only a preferred example of the present invention, and other thicknesses may be used.
The invention also provides a construction method of the fiber asphalt concrete pavement, which comprises the following steps: spraying transparent layer oil on the upper surface of the lower bearing layer 1 to form a transparent layer 2, and spraying adhesive layer oil on the upper surface of the transparent layer 2 to form an adhesive layer 3; laying lower layer fiber on the upper surface of the adhesive layer 3 to form a lower layer fiber layer 41, laying asphalt concrete on the upper surface of the lower layer fiber layer 41 to form an asphalt concrete layer 42, and laying upper layer fiber on the upper surface of the asphalt concrete layer 42 to form an upper layer fiber layer 43; the upper surface of the upper fiber layer 43 is rolled to tightly bond the upper fiber layer 43, the lower fiber layer 41 and the asphalt concrete layer 42.
Specifically, the construction is as follows: and spraying penetrating layer oil and bonding layer oil on the upper surface of the clean and dry lower bearing layer 1 in sequence, and paving fiber asphalt concrete when the bonding layer oil reaches a construction standard, wherein the lower layer fiber is paved on the upper surface of the lower bearing layer 1, and the upper layer fiber is paved on the upper surface of the paved asphalt concrete layer 42. The road section with the upper fiber layer 43, the lower fiber layer 41 and the asphalt concrete layer 42 paved is rolled and fully compacted to enable the fibers to be combined with the upper layer and the lower layer of the asphalt concrete to a deeper degree.
According to the construction method of the fiber asphalt concrete pavement, the lower fiber layer 41, the asphalt concrete layer 42 and the upper fiber layer 43 are respectively paved, the fibers and the concrete are not required to be mixed, the working procedure is simple, the operation is easy, the problem that the fibers and the concrete are difficult to mix and are not uniform in mixing is avoided, the construction is convenient, the fiber mixing amount is reduced, the cost is reduced, and the tensile strength of the bottom of the asphalt concrete and the rut resistance of the surface are obviously improved; and the application of the fiber asphalt concrete in actual road engineering is promoted.
The construction method of the fiber asphalt concrete pavement provided by the invention, under the condition that other components are not changed, prepares before construction, and before spraying penetrating oil on the upper surface of the lower bearing layer 1 to form a penetrating layer 2, further comprises the following steps: the newly built lower bearing layer 1 is cleaned and dried, and the old lower bearing layer 1 is reinforced. Meanwhile, emulsified asphalt and modified emulsified asphalt required by the penetrating layer 2 and the adhesive layer 3 are prepared, and the upper layer fiber, the lower layer fiber, the asphalt concrete and mechanical equipment required by construction are in accordance with the construction requirements, so that the method is convenient and practical.
In order to further optimize the above technical scheme, maintenance is performed after construction, and maintenance is performed on the fiber asphalt concrete pavement of the construction section after rolling the upper surface of the upper fiber layer 43. And during maintenance of the construction road section, cleaning the road surface, prohibiting the vehicle from passing, and starting the vehicle to pass when the temperature of the road surface is reduced to 50 ℃.
The construction method provided by the invention is exemplified by a specific construction process:
step A: the old concrete pavement is inspected and evaluated, and reinforcement is performed if necessary. And simultaneously, blocking traffic in a construction road section, and preparing required materials and construction machinery.
And (B) step (B): the old pavement is cleaned, the old pavement marking lines and other attachments which are difficult to clean are cleaned by adopting a polishing cleaning method, and then the air compressor is connected with a high-pressure spray gun to blow off dust and impurities on the surface.
Step C: the emulsified asphalt is selected as penetrating oil, the penetrating oil is sprayed on the road surface after the cleaning is completed by using an asphalt spraying vehicle, and the dosage of the penetrating oil is selected according to the standard requirement.
Step D: and (3) selecting modified emulsified asphalt as the adhesive layer oil, immediately utilizing an asphalt sprayer to spray the adhesive layer oil on the old pavement after the penetrating layer oil is demulsified, and selecting the dosage according to the specification requirement.
Step E: after the oil of the adhesive layer is demulsified, asphalt concrete is paved immediately, a spreading device is used for spreading steel fibers with the length of 30mm and the equivalent diameter of 0.3-0.8 mm in front of the asphalt spreader 6 as lower fibers along with the advancement of the asphalt spreader 6, so that the lower fibers are pressed on the bottom layer of the asphalt concrete, and the spreading amount is 1.4kg/m 2 . Meanwhile, the treated steel fiber with the length of 10mm and the equivalent diameter of 0.2mm is spread in front of the asphalt spreader 6 by using a spreading device as the upper fiber, namely the upper fiber is spread on the surface of asphalt concrete, and the spreading amount is 1.4kg/m 2 。
Step F: and (3) rolling the asphalt concrete pavement by utilizing the double-steel-wheel road roller 5 on the road section with the upper-layer fiber, wherein the rolling times are not less than 4 times, and fully compacting to enable the fiber to be tightly combined with the asphalt concrete.
Step G: and curing the compacted asphalt concrete pavement, paying attention to pavement cleaning and water resistance, and opening traffic when the temperature of the asphalt concrete pavement is lower than 50 ℃.
Comparison of the Steel fiber asphalt concrete pavement Performance in this example with an ordinary asphalt concrete pavement:
in the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms and the like is based on the azimuth or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The fiber asphalt concrete pavement is characterized by comprising a lower bearing layer, a penetrating layer (2) sprayed on the upper surface of the lower bearing layer (1), a bonding layer (3) sprayed on the upper surface of the penetrating layer (2), a lower fiber layer (41) paved on the upper surface of the bonding layer (3), an asphalt concrete layer (42) paved on the upper surface of the lower fiber layer (41), and an upper fiber layer (43) paved on the upper surface of the asphalt concrete layer (42), wherein the upper fiber layer (43), the lower fiber layer (41) and the asphalt concrete layer (42) are tightly combined,
the upper layer fiberThe spreading amount m of the layer (43) and the lower fiber layer (41) is kg/m 2 By the formulaIt is determined that the number of the cells,
wherein:，
is the equivalent diameter of the fiber, the fiber is the equivalent diameter of the fiber,
for the length of the fiber,
in order to spread the number of fibers,
the fiber spreading area is 0.25m 2 -0.5m 2 ，
Tiling equivalent area for fibers->。
2. The fibrous asphalt concrete pavement according to claim 1, wherein the upper fibrous layer (43) is a synthetic fibrous layer, a steel fibrous layer or a carbon fibrous layer;
the lower fiber layer (41) is a synthetic fiber layer, a steel fiber layer or a carbon fiber layer.
3. The fiber asphalt concrete pavement according to claim 1, wherein the upper fiber layer (43) and the lower fiber layer (41) are fiber layers with tensile strength of more than 500MPa, melting point of more than 220 ℃, rust prevention and corrosion resistance.
4. The fiber asphalt concrete pavement according to claim 1, wherein the upper fiber layer (43) is a fiber layer with a fiber length of 10 mm-15 mm and a fiber equivalent diameter of 0.18 mm-0.24 mm;
the lower fiber layer (41) is a fiber layer with a fiber length of 25-40 mm and a fiber equivalent diameter of 0.3-1.0 mm.
5. The fibrous asphalt concrete pavement according to any one of claims 1-4, characterized in that the thickness of the asphalt concrete layer (42) is 40 mm-60 mm.
6. The construction method of the fiber asphalt concrete pavement is characterized by comprising the following steps:
spraying transparent layer oil on the upper surface of the lower bearing layer (1) to form a transparent layer (2), and spraying adhesive layer oil on the upper surface of the transparent layer (2) to form an adhesive layer (3);
a lower fiber layer (41) is formed by paving lower fibers on the upper surface of the adhesive layer (3), an asphalt concrete layer (42) is formed by paving asphalt concrete on the upper surface of the lower fiber layer (41), and an upper fiber layer (43) is formed by paving upper fibers on the upper surface of the asphalt concrete layer (42);
and rolling the upper surface of the upper fiber layer (43) to tightly bond the upper fiber layer (43), the lower fiber layer (41) and the asphalt concrete layer (42).
7. The construction method according to claim 6, further comprising, before spraying the penetrating layer oil on the upper surface of the lower support layer (1) to form the penetrating layer (2): cleaning and drying the newly built lower bearing layer (1) and reinforcing the old lower bearing layer (1).
8. The construction method according to claim 6, characterized in that the method further comprises installing fiber spreading devices at both the front end and the rear end of the asphalt spreader (6) before laying down the lower fibers on the upper surface of the adhesive layer (3) to form the lower fiber layer (41).
9. The construction method according to claim 6, wherein the fiber asphalt concrete pavement of the construction section is cured after rolling the upper surface of the upper fiber layer (43).
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