CN115928524A - Assembled asphalt pavement precast block and manufacturing method thereof - Google Patents
Assembled asphalt pavement precast block and manufacturing method thereof Download PDFInfo
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- CN115928524A CN115928524A CN202211693986.6A CN202211693986A CN115928524A CN 115928524 A CN115928524 A CN 115928524A CN 202211693986 A CN202211693986 A CN 202211693986A CN 115928524 A CN115928524 A CN 115928524A
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Abstract
The invention discloses an assembled asphalt pavement precast block and a manufacturing method thereof, wherein the precast block is sequentially provided with a reinforcing rib layer, an asphalt lower surface layer, an interlocking layer, an anti-skid asphalt upper surface layer and a super-hydrophobic coating from bottom to top, and two adjacent layers of structures are bonded by spraying adhesive layer oil; the prefabricated blocks are provided with connecting parts, and the plurality of prefabricated blocks are longitudinally connected through the connecting parts; according to the invention, the asphalt surface layer is prefabricated, so that the factory production of production can be realized, the construction precision and the engineering quality are improved, the construction pollution is reduced, the construction process is simplified, and the labor rate is improved; numbering each prefabricated block so as to be convenient for quick positioning, maintenance and replacement; meanwhile, the sensor device can be embedded in advance during prefabrication, and support is provided for intelligently monitoring the road quality.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to an assembled asphalt pavement precast block and a manufacturing method thereof.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
At present, the development of fabricated building is vigorous, wherein the fabricated roads are not mature compared with other industries of the same type, and the fabricated asphalt pavement has larger prefabricating difficulty compared with the fabricated cement concrete pavement due to the special flexible structure. At present, most of the research on fabricated roads relates to fabricated road base layer plates, fabricated cement concrete pavement plates, plate treatment and the like. The current research work of the assembled asphalt pavement is still in the early stage of application, and the assembled asphalt pavement has a very large research space.
When traditional bituminous paving is under construction, often can cause great air and noise pollution, and can not reach very ideal construction quality effect usually. The assembled asphalt pavement can avoid on-site stirring and is quick to pave; factory prefabrication can realize streamlined and industrialized production, and guarantee construction quality and engineering effect; the method has the characteristics of easy repair and convenient and quick maintenance; more importantly, the method can reduce the generation of construction waste and reduce the urban environmental pollution, and is an important trend for the development of modern roads in future.
Therefore, the accelerated research on the assembled asphalt pavement with the advantages of quick construction, convenient maintenance, resource saving and the like has important significance on the development of the assembled road.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the assembly type asphalt pavement precast block and the manufacturing method thereof, which can improve the structural strength of the asphalt pavement, enhance the bearing capacity of the pavement, solve the problem of water seepage and water accumulation of the pavement and have the advantages of convenient installation and maintenance.
The technical scheme of the invention is as follows:
in the first aspect of the invention, the prefabricated block is provided with a reinforcing rib layer, an asphalt lower surface layer, an interlocking layer, an anti-skid asphalt upper surface layer and a super-hydrophobic coating from bottom to top, and two adjacent layers of structures are bonded by spraying adhesive layer oil; the prefabricated sections are provided with connecting parts, and the plurality of prefabricated sections are longitudinally connected through the connecting parts.
In some embodiments of the invention, the ribbed layer is a hot-galvanized double-twisted ribbed mesh.
In some embodiments of the invention, the asphalt sub-layer is asphalt concrete doped with basalt fibers, the basalt fibers having a length of 9mm and being doped in an amount of 0.3%.
In some embodiments of the present invention, the interlocking layer is one of a fiberglass grid or other geogrids.
In some embodiments of the invention, the anti-skid asphalt upper surface layer is a macadam asphalt surface layer doped with basalt fibers, the length of the basalt fibers is 9mm, and the doping amount is 0.3%.
In some embodiments of the present invention, the super-hydrophobic coating is formed by coating a nano-silica super-hydrophobic coating liquid on the surface of the precast block and then spraying the nano-silica super-hydrophobic coating liquid.
In some embodiments of the present invention, the viscous layer oil is modified emulsified asphalt or thermal modified asphalt.
In some embodiments of the present invention, the connecting portions are an upper connecting block and a lower connecting block which are arranged at two ends of the precast block, the upper connecting block and the lower connecting block are provided with threaded connecting holes, and two adjacent precast blocks are connected by a screw rod.
In some embodiments of the invention, the precast block has a width of one lane width, a length of 5 to 20m, and a thickness of 5.5 to 7.5cm.
In a second aspect of the present invention, there is provided a method for manufacturing an assembled asphalt pavement precast block, comprising the steps of:
cleaning the surface of a special substrate, and paving a reinforcement layer: double-twisted reinforcing mesh;
spraying adhesive layer oil on the twisted steel bar net: modifying the emulsified asphalt;
paving an asphalt lower surface layer, and rolling;
cleaning and flattening the surface, laying and fixing an embedded locking layer, namely a glass fiber grating, and rolling;
spraying adhesive layer oil: modifying the emulsified asphalt;
paving an upper asphalt surface layer, rolling, and manufacturing an upper connecting block on a corresponding die;
cleaning the surface, and spraying slurry to seal the layer;
cleaning the road surface, coating the road surface to enable a part of super-hydrophobic solution to enter the interior of the road surface, and then spraying by using spraying equipment to manufacture a super-hydrophobic coating;
cutting a plane of the lower connecting block at the connecting position, and reserving a splicing position corresponding to the upper connecting block; and the upper and lower connecting blocks are chiseled with screw holes with corresponding apertures, and the sizes and the positions of the connecting holes are correspondingly the same.
One or more technical schemes of the invention have the following beneficial effects:
(1) The invention can interlock with asphalt aggregate to play a role of reinforcement by arranging the double-twisted reinforced mesh with high strength, low creep deformation and brittle fracture resistance, and can transfer concentrated load to the reinforced surface in time, thereby improving the structural strength of the asphalt surface layer, effectively delaying the development of reflection cracks and fatigue cracks of the pavement, improving the bearing capacity and prolonging the service life.
(2) According to the invention, the high-temperature-resistant, low-cold-resistant and corrosion-resistant glass fiber grating with high longitudinal and transverse bidirectional tensile strength, low elongation and high temperature resistance is arranged between the asphalt surface layers to serve as the interlocking layer, so that the high-temperature-resistant, low-cold-resistant and corrosion-resistant glass fiber grating has good compatibility with asphalt, can play a skeleton role in the asphalt surface layers to form a composite mechanical interlocking system, limits the movement of aggregate particles, enhances the transverse constraint force in the asphalt surface layers, and thus plays a role in reducing rutting deformation and displacement.
(3) According to the invention, the basalt fiber is doped in the asphalt, and the basalt fiber can be mechanically anchored with the asphalt mixture to adsorb the asphalt by utilizing the characteristic of uneven surface of the basalt fiber, and is firmly combined with the asphalt, so that the internal stability of the asphalt is enhanced, the temperature sensitivity of the asphalt is reduced, and the temperature stability of the asphalt is improved; meanwhile, basalt fibers can be dispersed in the mixture to form a multi-dimensional fiber net, so that the cracking resistance and the structural strength of the asphalt surface layer are improved, and the service life is prolonged.
(4) According to the invention, the super-hydrophobic coating is sprayed on the surface layer of the asphalt, so that the asphalt pavement is hydrophobic, anti-skidding, anti-icing and anti-icing to a certain extent, thereby ensuring the driving safety and realizing the sustainable development of the road.
(5) According to the invention, the asphalt surface layer is prefabricated, so that the factory production of production can be realized, the construction precision and the engineering quality are improved, the construction pollution is reduced, the construction process is simplified, and the labor rate is improved; numbering each prefabricated block so as to be convenient for quick positioning, maintenance and replacement; meanwhile, the sensor device can be embedded in advance during prefabrication, and support is provided for intelligently monitoring the road quality.
Drawings
FIG. 1 is a schematic structural level view of an assembled asphalt pavement precast block of the present invention;
FIG. 2 is a top view of the fabricated asphalt pavement precast block of the present invention;
FIG. 3 is a schematic structural diagram of a connecting portion lower connecting block of the fabricated asphalt pavement precast block of the present invention;
fig. 4 is a schematic structural diagram of the connecting block on the connecting part of the assembly type asphalt pavement precast block of the invention.
In the figure: 1-super-hydrophobic coating, 2-anti-skid asphalt upper surface layer, 3-interlocking layer, 4-asphalt lower surface layer, 5-reinforcing layer, 6-functional layer (sealing layer and bonding layer) and 7-gravel layer (base layer).
Detailed Description
The invention is described below with reference to the accompanying drawings.
Example 1
In a typical embodiment of the invention, an assembly type asphalt pavement precast block is provided, as shown in fig. 1-4, the precast block is sequentially provided with a reinforcement layer 5, an asphalt lower surface layer 4, an interlocking layer 3, an anti-slip asphalt upper surface layer 2 and a super-hydrophobic coating 1 from bottom to top, wherein the thickness of the asphalt lower surface layer 4 is set to be 32-45mm, the thickness of the anti-slip asphalt upper surface layer 2 is set to be 20-28mm, and adjacent two layers of structures are bonded by spraying bonding layer oil; the prefabricated sections are provided with connecting parts, and the plurality of prefabricated sections are longitudinally connected through the connecting parts.
The ribbed layer 5 adopts a hot galvanizing double-stranded ribbed net, the specification of the grid is 80mm multiplied by 100mm, the diameter of a ribbed bar is 3.4mm, and the ribbed layer can be cut according to the requirement; the hot galvanizing double-twisted reinforcing mesh has the characteristics of high strength, low creep deformation and brittle fracture resistance, can be interlocked with asphalt aggregate to play a role in reinforcing, and can transfer concentrated load to a reinforcing surface in time, so that the structural strength of an asphalt surface layer is improved, the development of reflection cracks and fatigue cracks of a pavement is effectively delayed, the bearing capacity is improved, and the service life is prolonged.
The asphalt lower surface layer 4 is AC-20 asphalt concrete doped with basalt fibers, the length of the basalt fibers is 9mm, and the doping amount is 0.3%; the basalt fiber can be mechanically anchored with the asphalt mixture to adsorb asphalt by utilizing the characteristic of uneven surface of the basalt fiber, and is firmly combined with the asphalt, so that the internal stability of the asphalt is enhanced, the temperature sensitivity of the asphalt is reduced, and the temperature stability of the asphalt is improved; meanwhile, the basalt fibers can be dispersed in the mixture to form a multi-dimensional fiber net, so that the cracking resistance and the structural strength of the asphalt surface layer are improved, and the service life is prolonged.
The interlocking layer 3 is a glass fiber grating or one of other geogrids, and the glass fiber grating with the mesh size of 3mm multiplied by 3mm can be selected specifically; the glass fiber grating has the characteristics of high longitudinal and transverse bidirectional tensile strength, low elongation, high temperature resistance, low cold resistance and corrosion resistance, is arranged between the lower asphalt surface layer 4 and the upper anti-skid asphalt surface layer 2, has better compatibility with asphalt, can play a skeleton role in the asphalt surface layer, forms a composite mechanical interlocking system, limits the movement of aggregate particles, enhances the transverse constraint force in the asphalt surface layer, and plays a role in reducing rutting deformation and displacement.
The anti-skid asphalt upper surface layer 2 is an SMA-13 asphalt mastic macadam mixture doped with basalt fibers, the length of the basalt fibers is 9mm, and the doping amount is 0.3%.
The super-hydrophobic coating 1 is prepared by coating nano-silica super-hydrophobic coating liquid on the upper surface of the precast block and then spraying; by spraying the super-hydrophobic coating, the hydrophobic, anti-skid and anti-icing of the asphalt pavement can be realized to a certain extent, so that the running safety is ensured and the sustainable development of the road is realized.
In this embodiment, the adhesive layer oil is modified emulsified asphalt or thermally modified asphalt, which can be firmly bonded between layers, thereby improving the strength of the whole precast block.
In this embodiment, as shown in fig. 2-4, the connecting portion is an upper connecting block and a lower connecting block which are arranged at two ends of the prefabricated block, the upper connecting block and the lower connecting block are provided with threaded connecting holes, and two adjacent prefabricated blocks are connected through a screw rod; specifically, the connection position is for reserving the position on the pitch surface course, and the direct mould that corresponds is made and forms, and every prefabricated section sets up 4 from top to bottom butts to establish a plurality of threaded connecting holes on the butts, go up the butts and should be as thick as the upper strata of pitch, the lower butts should be as thick as the lower strata of pitch, during the concatenation, the upper and lower butts should laminate well. The hole diameters of the connecting holes are equal, the positions of the upper and lower corresponding connecting holes are correspondingly the same, and the upper and lower holes are correspondingly free from deviation during splicing; the connecting holes are used for fixing the upper connecting block and the lower connecting block through threaded rods with corresponding diameters and connecting two adjacent prefabricated blocks.
The layers are paved, rolled and overlapped to form a precast block, the width of the precast block is one lane width, the length is 5-20m, and the thickness is 5.5-7.5cm; in some embodiments, each layer of the preform block is laid, rolled, and stacked into a block having a thickness of 6.5cm, a width of 3.5m, and a length of 15 m. And numbering each prefabricated block according to the following numbering rules: weaving from a construction starting point to a first row to a terminal point; the block piece from the starting point to the end point in the traveling direction is Q, and the block piece from the end point to the starting point in the traveling direction is Z; numbering increases from the pieces closer to the road centerline. For example: 1-Q-2, starting from the starting point to the first row, and the driving direction is from the beginning to the end, and is a precast block of a second block away from the center line of the road.
The installation and use steps of the fabricated asphalt pavement precast block provided by the embodiment are as follows:
(1) After the gravel layer 7 is constructed, the permeable layer oil (PC-2 emulsified asphalt, 1L/m) is sprayed in time 2 ) Penetrating the penetrating layer oil into the gaps of the base layer by at least 0.6cm to form a functional layer 6, playing a role in sealing and bonding, and then watering and maintaining;
(2) Cleaning and leveling the road surface, roughening, and then spraying adhesive layer oil: modified emulsified asphalt (0.5L/m) 2 )；
(3) Laying prefabricated blocks, wherein the connecting holes are aligned;
(4) Inserting a threaded rod in a spiral manner to complete longitudinal connection; and performing crack pouring treatment on the joint parts and the transverse joints, and finishing assembling.
According to the assembly type asphalt pavement precast block provided by the embodiment, the asphalt surface layer is precast, so that the production industrialization can be realized, the construction precision and the engineering quality are improved, the construction pollution is reduced, the construction process is simplified, and the labor rate is improved; numbering each prefabricated block so as to be convenient for quick positioning, maintenance and replacement; meanwhile, the sensor device can be embedded in advance during prefabrication, and support is provided for intelligently monitoring the road quality.
Example 2
In a typical embodiment of the present invention, a method for manufacturing an assembly type asphalt pavement precast block is provided, including the steps of:
cleaning the surface of a special substrate (a metal plate, and performing rough treatment or marking lines on the surface), and paving a reinforcement layer: twining a reinforcing mesh;
spraying adhesive layer oil on the twisted steel bar net: modified emulsified asphalt (0.5L/m) 2 )；
Paving an asphalt lower surface layer, and rolling;
cleaning and flattening the surface, laying and fixing an embedded locking layer, namely a glass fiber grating, and rolling;
spraying adhesive layer oil: modified emulsified asphalt (0.5L/m) 2 )；
Paving an upper asphalt surface layer, rolling and manufacturing upper connecting blocks on corresponding dies;
cleaning the surface, and spraying slurry to seal the layer;
cleaning a road surface, coating the road surface to enable a part of super-hydrophobic solution to enter the interior of the road surface, and then spraying by using spraying equipment to manufacture a super-hydrophobic coating;
the plane of the lower connecting block is cut at the connecting position, the splicing position corresponding to the upper connecting block is reserved, the threaded holes with corresponding apertures are chiseled on the upper connecting block and the lower connecting block, and the sizes and the positions of the connecting holes are correspondingly the same.
The embodiments described above are intended to illustrate the technical solutions of the present invention in detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modification, supplement or similar substitution made within the scope of the principles of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An assembled asphalt pavement precast block is characterized in that the precast block is sequentially provided with a reinforcing rib layer, an asphalt lower surface layer, an interlocking layer, an anti-skid asphalt upper surface layer and a super-hydrophobic coating from bottom to top, and two adjacent layers of structures are bonded by spraying adhesive layer oil; the prefabricated sections are provided with connecting parts, and the plurality of prefabricated sections are longitudinally connected through the connecting parts.
2. The fabricated asphalt pavement precast block of claim 1, wherein the ribbed layer is a hot-galvanized double-twisted ribbed mesh.
3. The fabricated asphalt pavement precast block according to claim 1, wherein the asphalt sub-layer is asphalt concrete doped with basalt fiber having a length of 9mm in an amount of 0.3%.
4. The fabricated asphalt pavement precast block of claim 1, wherein the interlocking layer is one of a fiberglass grid or other geogrids.
5. The fabricated asphalt pavement precast block of claim 1, wherein the anti-skid asphalt upper layer is an asphalt mastic macadam surface layer doped with basalt fiber, the length of the basalt fiber being 9mm, and the content of the basalt fiber being 0.3%.
6. The fabricated asphalt pavement precast block as recited in claim 1, wherein said super-hydrophobic coating is formed by coating a nano-silica super-hydrophobic coating liquid on the surface of the precast block and then spraying the nano-silica super-hydrophobic coating liquid.
7. The fabricated asphalt pavement precast block of claim 1, wherein the binder oil is selected from modified emulsified asphalt or thermally modified asphalt.
8. The fabricated asphalt pavement precast block as set forth in claim 1, wherein said connecting portions are upper and lower blocks provided at both ends of the precast block, said upper and lower blocks being provided with threaded connection holes for connecting adjacent two precast blocks by means of screws.
9. The fabricated asphalt pavement precast block of claim 1, wherein the precast block has a width of one lane width, a length of 5 to 20m, and a thickness of 5.5 to 7.5cm.
10. A method for manufacturing an assembled asphalt pavement precast block according to any one of claims 1 to 9, comprising the steps of:
cleaning the surface of a special substrate, and paving a reinforcement layer: double-twisted reinforcing mesh;
spraying adhesive layer oil on the twisted steel bar net: modifying the emulsified asphalt;
paving an asphalt lower surface layer, and rolling;
cleaning and flattening the surface, laying and fixing an embedded locking layer, namely a glass fiber grating, and rolling;
spraying adhesive layer oil: modifying emulsified asphalt;
paving an upper asphalt surface layer, rolling, and manufacturing an upper connecting block on a corresponding die;
cleaning the surface, and spraying slurry to seal the layer;
cleaning the road surface, coating the road surface to enable a part of super-hydrophobic solution to enter the interior of the road surface, and then spraying by using spraying equipment to manufacture a super-hydrophobic coating;
cutting a plane of the lower connecting block at the connecting position, and reserving a splicing position corresponding to the upper connecting block; and the upper and lower connecting blocks are chiseled with screw holes with corresponding apertures, and the sizes and the positions of the connecting holes are correspondingly the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211693986.6A CN115928524A (en) | 2022-12-28 | 2022-12-28 | Assembled asphalt pavement precast block and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211693986.6A CN115928524A (en) | 2022-12-28 | 2022-12-28 | Assembled asphalt pavement precast block and manufacturing method thereof |
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| CN115928524A true CN115928524A (en) | 2023-04-07 |
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| CN202211693986.6A Pending CN115928524A (en) | 2022-12-28 | 2022-12-28 | Assembled asphalt pavement precast block and manufacturing method thereof |
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- 2022-12-28 CN CN202211693986.6A patent/CN115928524A/en active Pending
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