Corridor pavement material for electronically guided rubber-tyred system, and paving method

Abstract

A corridor pavement material for an electronically guided rubber-tyred system. The corridor pavement material for the electronically guided rubber-tyred system comprises a grouting material and a porous asphalt mixture matrix; the grouting material is composed of powder and water, wherein the powder in the grouting material comprises cement, an elastomeric latex, an active filler, a water reducing agent, a reinforcing agent, a stabilizer and conductive particles; the porous asphalt mixture matrix comprises aggregate, asphalt, a surface active binder and fibers; the porosity of the porous asphalt mixture matrix is 10%-28%; and the composite gradation of matrix aggregate is controlled. A cement-asphalt composite material is used, the flexibility of asphalt and the rigidity of cement are both achieved, the material strength and proportion are appropriate, the rigidity of a rigid material matches that of a flexible material, and the adhesive force is good; and by controlling the gradation of aggregate and by means of a reasonable rolling process, excellent rutting resistance and durability are achieved under heavy load of a system vehicle, complete channelization and multiaxial loading.

Description

Electronic guide rubber wheel system corridor pavement material and paving method Technical Field

[0001] The present invention belongs to the field of roadbed and pavement design of an electronically guided rubber wheel system, and in particular relates to a corridor pavement material and a paving method of an electronically guided rubber wheel system. Background Art

[0002] The electronically guided rubber-tyred system is a new, high-end intelligent rail transit system. It uses rubber-tyred wheels to carry the vehicle, eliminating the need for dedicated physical track. Using virtual track-following technology, it enables automatic tracking and self-guiding within corridors (dedicated lanes for system operation). This vehicle is not only a new type of "zero-pollution" and "zero-emission" transportation, but also boasts a short construction period, minimal infrastructure investment, high urban adaptability, and strong comprehensive transportation capacity. It is expected to provide core technical support for the development of smart transportation in small and medium-sized cities. The Zhuzhou electronically guided rubber-tyred system project was featured at the Second United Nations Global Sustainable Transport Conference.

[0003] The system's six-axle vehicles are twice the length of an 18-meter articulated bus. They feature a single-axle, single-wheel design, and tire size and load capacity larger than those of conventional buses, with tire pressures reaching 1.2 MPa. Their fully channelized, multi-axle, and heavy-duty nature significantly differs from existing buses in their road loading behavior. Therefore, the corridor pavement structure suitable for the electronically guided rubber-tire system presents unique characteristics, requiring targeted research and design. When conventional asphalt was used, the corridor pavement experienced severe rutting problems early in its operation, accompanied by slippage and congestion, particularly in the platform area.

[0004] The Zhuzhou EGRTS test route was first put into operation in China in 2018, operating 14 trips daily, mostly unloaded. After more than a year of operation, the test road developed significant rutting due to the unique driving patterns of the system's vehicles and high tire pressures. Rutting was approximately 400mm wide and 25mm deep at the Sports Center Station, which had been resurfaced after milling. Within two months, rutting had again reached 11mm. The Yibin EGRTS system was initially planned to operate 166 times daily. As the primary means of public transportation for local residents, the system's vehicles left the road in poor condition, with rutting depths generally exceeding 20mm at the platform area. In some sections, the use of mixed right-of-way and the significant increase in turning buses exacerbated rutting and caused slippage. For example, at the intersection of Yibin Park Station, rutting depths reached 80mm. Rutting not only degraded the road's appearance but also contributed to secondary problems such as potholes and water damage, accelerating the deterioration of the road structure. Furthermore, pavement deformation affected vehicle tracking accuracy, particularly the docking accuracy of system vehicles approaching stations. During rainy days, water accumulation in ruts can cause vehicles to hydroplaning and skid, compromising driving safety. Furthermore, the uneven road surface caused by rutting can cause passengers to feel jolted, reducing vehicle service quality and driving comfort. To further promote the application of electronically guided rubber tire systems, the rutting problem on corridor pavements needs to be addressed urgently.

[0005] Patent CN113136761A proposes the use of a poured semi-flexible pavement as a paving solution for corridor pavements of electronic guided rubber tire systems, which can effectively solve the problem of rutting on corridor pavements and discloses a pavement paving structure. However, it does not provide a corresponding material ratio solution for the heavy-load, channelized, and multi-axle traffic characteristics of the pavement, which may cause cracking, insufficient durability, and other problems after operation. Patent CN114716180B discloses a high-performance colored semi-flexible pavement material suitable for heavy-loaded urban roads, discloses a method for obtaining the slurry composition and slurry color, and does not limit the material properties for heavy loads. Patent CN103866667B discloses a heavy-load semi-flexible pavement structure, which limits the combination of the upper, middle, and lower layers of the pavement, solves the rutting problem, but does not involve material-related parameters.

[0006] A large number of studies have shown that the electronic guided rubber wheel system corridor pavement, a vehicle pavement with autonomous driving characteristics, has special heavy-load, fully channelized, and multi-axle traffic characteristics, and the semi-flexible material design system of ordinary pavement cannot be used. Comprehensive consideration should be given to multiple factors such as anti-rutting, anti-cracking, and anti-fatigue to achieve a long life for the electronic guided rubber wheel system corridor pavement and significantly save road construction costs and maintenance investment.

[0007] Summary of the Invention

[0008] In view of the deficiencies in the prior art, the present invention provides an electronically guided rubber wheel system corridor pavement material and paving method to solve the problems of severe rutting and cracking in the existing corridor pavement.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] An electronically guided rubber wheel system corridor pavement material comprises a grouting material and a large-void asphalt mixture matrix;

[0011] The composition of the grouting material is calculated by weight as follows: 100 parts of powder and 28-35 parts of water; wherein the powder in the grouting material includes the following components, and the weight parts of each component are as follows:

[0012] The large void asphalt mixture matrix comprises the following components, and the weight proportions of each component are as follows:

[0013] The void ratio of the large-void asphalt mixture matrix is ​​10% to 28%;

[0014] The synthetic gradation of the large-void asphalt mixture base aggregate is:

[0015] The aggregate passing rate of 16mm sieve is 100%.

[0016] The aggregate passing rate of 13.2mm sieve is 70% to 100%.

[0017] The aggregate passing rate of 9.5mm sieve is 10% to 50%.

[0018] The aggregate passing rate of 4.75mm sieve is 5% to 25%.

[0019] The aggregate passing rate of 2.36mm sieve hole is 4% to 20%.

[0020] The aggregate passing rate of 1.18mm sieve hole is 3% to 18%.

[0021] The aggregate passing rate of 0.6mm sieve is 3% to 16%.

[0022] The aggregate passing rate of 0.3mm sieve hole is 3% to 14%.

[0023] The aggregate passing rate of 0.15mm sieve is 2% to 12%.

[0024] The aggregate passing rate of 0.075mm sieve is 1% to 10%.

[0025] The total percentage of aggregates of different particle sizes is 100%.

[0026] In the large-void asphalt mixture matrix, asphalt serves as the main binder, and the surfactant binder mainly improves the wettability of asphalt and enhances the adhesion with the cement interface; the fibers are distributed in the asphalt mortar after mixing, enhancing the toughness of the material, and also having a certain oil absorption capacity, thereby increasing the thickness of the asphalt film and enhancing its flexibility.

[0027] Preferably, the final strength of the grouting material is 35MPa-45MPa, the 2h strength is 10MPa-30MPa, and the fluidity is 10s-14s.

[0028] Preferably, the weight ratio of the grouting material to the large-void asphalt mixture matrix is ​​10-30:70-90.

[0029] Preferably, the elastomer latex in the grouting material is used to increase the flexibility of the rigid grouting material, and is selected from a mixture of any one or more of epoxy emulsion, polyester latex, ternary copolymer elastomer latex, and acrylic polymer; wherein the ternary copolymer elastomer latex is selected from a mixture of any one or more of trifluorochloroethylene-vinylidene fluoride copolymer elastomer latex, vinylidene fluoride-perfluoropropylene copolymer elastomer, and vinylidene fluoride-tetravinylidene fluoride-perfluoropropylene.

[0030] Preferably, the active filler in the grouting material is used to increase the reactivity of the grouting material, and is selected from a mixture of any one or more of blast furnace slag, pozzolanic powder, fly ash, lime powder, and active mineral powder.

[0031] Preferably, the water reducer in the grouting material is used to increase the fluidity of the grouting material under a certain water-cement ratio, and is selected from a mixture of any one or more of sulfonate type, polycarboxylic acid type, aliphatic type, and polyoxyethylene type water reducers.

[0032] Preferably, the reinforcing agent in the grouting material is used to increase the strength and wettability of the grouting material, and is selected from a mixture of any one or more of active mineral powder, nano-diatomaceous earth, nano-silicon oxide, metal organic framework materials, carbon nanotubes, graphene, and nano-silicon.

[0033] Preferably, the stabilizer in the grouting material is used to enhance the system stability of the grouting material during working time, and is selected from a mixture of any one or more of fibers, expansion agents, shrinkage reducers, and temperature absorbers.

[0034] Preferably, the conductive particles in the grouting material are used to conduct current in the vehicle body, and the particle size is less than 1.18 mm.

[0035] Preferably, in the large-void asphalt mixture matrix, the asphalt serving as the binder of the asphalt matrix mixture is selected from a mixture of any one or more of base asphalt, SBS asphalt, high-viscosity modified asphalt, rubber asphalt, epoxy asphalt, and polyurethane asphalt; the surfactant is an amphiphilic block copolymer; and the fiber is selected from a mixture of any one or more of lignin fiber, polymer fiber, steel fiber, and basalt fiber.

[0036] Preferably, the aggregate of the large-void asphalt mixture matrix serves as the skeleton of the asphalt-based mixture and also includes conductive particles. The conductive particles are mixed into the aggregate as blocky materials. The total volume of the conductive particles in the grouting material and aggregate accounts for 10% to 27% of the total volume of the pavement material. The particle size distribution of the conductive particles in the aggregate is 4.75 cm to 9.5 cm: 9.5 cm to 13.5 cm = 2:5. This can effectively eliminate the induced voltage generated by the electric vehicle during charging, ensuring safe operation and maintenance.

[0037] Preferably, in the pavement material, the conductive particles in the grouting material are metal conductive particles, which are used to conduct the current of the vehicle body.

[0038] The conductive particle size ratio in the large-void asphalt mixture matrix of the present invention not only matches the aggregate gradation, but also has its own gradation that can be effectively embedded and connected, which is beneficial to conductivity.

[0039] The present invention also provides a method for laying the corridor pavement material of the electronic guided rubber wheel system, comprising the following steps:

[0040] (1) Laying the large-void asphalt mixture matrix: placing the various material components of the large-void asphalt mixture matrix in a mixing plant according to their mass fractions, and mixing them at 160°C to 180°C for 40s to 55s to obtain the asphalt mixture; spreading the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 to 1.25, and rolling it with a steel wheel roller, with the first pass being static compaction, the second to fourth passes being vibratory compaction, and the fifth to sixth passes being static compaction. When the temperature drops to 70°C to 90°C, final compaction is performed to obtain the paved large-void asphalt mixture matrix;

[0041] Among them, the surfactant binder is added in two ways: one is to add the surfactant binder into the molten asphalt and mix it evenly; the other is to add the surfactant binder at a rate of 0.05-0.2 kg / (cm*m 2 ) quality sprayed into the paved 40-90℃ asphalt mixture matrix;

[0042] (2) Preparation of grouting material: put the powder and water into a blender according to the mass fraction and mix for 90 seconds at a stirring speed of not less than 200 r / min to obtain the grouting material;

[0043] (3) Grouting: Pump the grouting material in the above step (2) to the surface of the asphalt mixture base laid in step (1), so that the slurry is 1-2 cm higher than the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry on the surface of the asphalt mixture base, and the surface exposed stone depth is 0.6-5 mm.

[0044] The pavement material paving method of the present invention adopts a vibration compaction process, mainly because vibration compaction can reshape the aggregate skeleton and make the skeleton denser.

[0045] The present invention also provides the application of the electronically guided rubber wheel system corridor pavement material as a pavement for vehicles with automatic tracking or automatic driving.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) The corridor pavement used in the electronic guided rubber wheel system is made of cement-asphalt composite material, which has both the flexibility of asphalt and the rigidity of cement. The material strength and proportion are well matched, the rigidity of the rigid and flexible materials are well matched, and the adhesion is good. It has excellent anti-rutting effect and durability under the heavy load, full channelization and multi-axis load of the system vehicle.

[0048] (2) The material used for the corridor pavement of the electronic guided rubber wheel system can achieve a larger connected porosity and better filling fullness through controlling the gradation and reasonable rolling process, and has excellent bearing capacity.

[0049] (3) The method for laying the corridor pavement for the electronic guided rubber wheel system is simple and easy to implement. DETAILED DESCRIPTION

[0050] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0051] Example 1

[0052] In this embodiment, an electronically guided rubber tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The grouting material is composed of 100 parts powder and 28 parts water by weight. The large-void asphalt mixture matrix has a porosity of 10%. The grouting material has a final strength of 35 MPa, a 2-hour strength of 10 MPa, and a fluidity of 10 seconds.

[0053] The grouting material powder includes 57 parts of cement, 10 parts of epoxy emulsion elastomer latex, 22 parts of fly ash, 3 parts of sulfonate type water reducer, 5 parts of active mineral powder and nano diatomaceous earth reinforcing agent (ratio 1:4), and 3 parts of expansion stabilizer;

[0054] The asphalt mixture matrix includes 100 parts of aggregate, 4.2 parts of SBS asphalt, 0.3 parts of surfactant binder, and 0.2 parts of lignin fiber; the surfactant binder is an amphiphilic block copolymer;

[0055] The large-void asphalt mixture matrix includes blocky conductive metal aggregates, the volume of which accounts for 10% of the total volume of the road surface, and the particle size distribution of the metal aggregates is 4.75cm to 9.5cm:9.5cm to 13.5cm = 2:5.

[0056] The synthetic gradation of the aggregate in the asphalt mixture matrix is ​​shown in Table 1.

[0057] Table 1 Synthetic gradation of asphalt mixture matrix aggregate (Example 1)

[0058] The method for laying corridor pavement materials of the electronic guided rubber wheel system comprises the following steps:

[0059] 1) Laying the base asphalt mixture: Place the asphalt mixture in the mixing plant and mix at 160°C for 55 seconds. Spread the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 and use a steel wheel roller to roll it. The first pass is static compaction, the second to fourth passes are vibratory compaction, and the fifth to sixth passes are static compaction. When the temperature drops to 70-90°C, final compaction is performed.

[0060] 2) Preparation of grouting liquid: put the slurry powder and water into a blender and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0061] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2 cm higher than the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry on the surface of the asphalt mixture base, and the surface exposed stone depth is 0.6-5 mm.

[0062] Comparative Example 1

[0063] Ordinary cast-in-place pavement material was used, with a final strength of 60 MPa and no strength after 2 hours. Other aspects were the same as in Example 1.

[0064] Comparative Example 2

[0065] The void ratio of the large-void asphalt mixture matrix was 25%, and the gradation was outside the upper and lower limits specified in the present invention, as shown in Table 2. The SBS asphalt accounted for 3.2%. Other conditions were the same as in Example 1.

[0066] Table 2 Synthetic gradation of asphalt mixture matrix aggregate (Comparative Example 2)

[0067] Comparative Example 3

[0068] The vibration process is not used during rolling, and the vibration compaction times are replaced by static pressure. Other aspects are the same as those in Example 1.

[0069] Example 2

[0070] In this embodiment, a corridor pavement material for an electronically guided rubber tire system includes a grouting material and a large-void asphalt mixture matrix. The grouting material is composed of 100 parts powder and 35 parts water by weight. The large-void asphalt mixture matrix has a porosity of 16%. The grouting material has a final strength of 40 MPa, a 2-hour strength of 13 MPa, and a fluidity of 12 seconds.

[0071] The grouting material powder includes 69 parts of cement, 4 parts of polyester latex, 17 parts of lime powder, 1.5 parts of polycarboxylic acid water reducer, 5.5 parts of graphene reinforcing agent, and 3 parts of shrinkage reducing stabilizer;

[0072] The large-void asphalt mixture matrix comprises 100 parts of aggregate, 3.8 parts of polyurethane asphalt, 0.6 parts of surfactant binder, and 0.3 parts of polymer fiber; the surfactant binder is an amphiphilic block copolymer;

[0073] The large-void asphalt mixture matrix also includes blocky conductive metal aggregates, the volume of which accounts for 20% of the total volume of the road surface, and the particle size distribution of the metal aggregates is 4.75cm~9.5cm:9.5cm~13.5cm=2:5;

[0074] The synthetic gradation of the aggregate in the asphalt mixture matrix is ​​shown in Table 3.

[0075] Table 3 Synthetic gradation of asphalt mixture matrix aggregate (Example 2)

[0076] The method for laying corridor pavement materials of the electronic guided rubber wheel system comprises the following steps:

[0077] 1) Laying the base asphalt mixture: Place the asphalt mixture material in the mixing pot of the mixing plant and mix it at 180℃ for 55s; spread the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 and roll it with a steel wheel roller. The first pass is static compaction, the second to fourth passes are vibration compaction, and the fifth to sixth passes are static compaction. When the temperature drops to 70-90℃, the final compaction is performed.

[0078] 2) Prepare grouting liquid: put the slurry powder and water into a blender and mix for 90 seconds at a stirring speed of not less than 200 r / min.

[0079] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2 cm higher than the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry on the surface of the asphalt mixture base, and the surface exposed stone depth is 0.6-5 mm.

[0080] Comparative Example 4

[0081] The polyester latex and graphene reinforcing agent in the grouting material of Example 2 were removed, and the mass fraction of the active filler lime powder was increased to 26.5 parts. The rest was the same as in Example 2.

[0082] Example 3

[0083] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes grouting material and a large-void asphalt mixture matrix. The grouting material is composed of 100 parts powder and 30 parts water by weight. The large-void asphalt mixture matrix has a porosity of 18%. The grouting material has a final strength of 38 MPa, a 2-hour strength of 30 MPa, and a fluidity of 14 seconds.

[0084] The grouting material powder comprises 90 parts of cement, 2 parts of ternary copolymer elastomer latex, 2 parts of pozzolanic powder, 1 part of aliphatic water reducer, 2 parts of metal organic framework material and carbon nanotube mixture reinforcing agent (ratio is 1:1), 1 part of fiber stabilizer, and 2 parts of conductive particles. The particle size of the conductive particles in the grouting material ranges from 0 to 1.18 mm.

[0085] The large-void asphalt mixture matrix includes 100 parts of aggregate, 5.5 parts of epoxy asphalt, 0.4 parts of surfactant binder, and 0.4 parts of steel fiber; the surfactant binder is an amphiphilic block copolymer.

[0086] The large-void asphalt mixture matrix includes blocky conductive metal aggregates, the volume of which accounts for 13% of the total volume of the pavement, and the particle size distribution of the metal aggregates is 4.75 cm to 9.5 cm: 9.5 cm to 13.5 cm = 2:5;

[0087] The synthetic gradation of the aggregate in the asphalt mixture matrix is ​​shown in Table 4.

[0088] Table 4 Synthetic gradation of asphalt mixture matrix aggregate (Example 3)

[0089] The method for laying corridor pavement materials of the electronic guided rubber wheel system comprises the following steps:

[0090] 1) Laying the base asphalt mixture: Place the asphalt mixture in the mixing plant and mix at 180°C for 55 seconds. Spread the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 and use a steel wheel roller to roll it. The first pass is static compaction, the second to fourth passes are vibratory compaction, and the fifth to sixth passes are static compaction. When the temperature drops to 70-90°C, final compaction is performed.

[0091] 2) Prepare grouting liquid: put the slurry powder and water into a blender and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0092] 3) Pouring: Pump the slurry to the surface of the paved asphalt mixture base, so that the slurry is 1-2 cm higher than the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry on the surface of the asphalt mixture base, and the surface exposed stone depth is 2-5 mm.

[0093] Comparative Example 5

[0094] The large-void asphalt mixture matrix in Example 3 includes the massive conductive metal aggregate, and the volume ratio of ordinary aggregate of the same particle size is increased to 13%, with a ratio of 4.75 cm to 9.5 cm:9.5 cm to 13.5 cm = 2:5. The conductive particles in the grout are also removed, and the weight percentage of cement is increased to 92 parts. Other aspects are the same as in Example 3.

[0095] Example 4

[0096] In this embodiment, a corridor pavement material for an electronically guided rubber tire system includes a grouting material and a large-void asphalt mixture matrix. The grouting material is composed of 100 parts powder and 32 parts water by weight. The large-void asphalt mixture matrix has a porosity of 15%. The grouting material has a final strength of 36 MPa, a 2-hour strength of 18 MPa, and a fluidity of 11 seconds.

[0097] The grouting material powder includes 67 parts of cement, 3 parts of acrylic polymer latex, 20 parts of blast furnace slag, 2 parts of polyoxyethylene water reducer, 1 part of nano-silicon reinforcing agent, 2 parts of temperature absorber, and 5 parts of conductive particles. The particle size of the conductive particles in the grouting material ranges from 0.15 mm to 0.3 mm.

[0098] The large-void asphalt mixture matrix comprises 100 parts of aggregate, 4.6 parts of high-viscosity modified asphalt, 0.6 parts of surfactant binder, and 0.4 parts of basalt fiber; the surfactant binder is an amphiphilic block copolymer;

[0099] The large-void asphalt mixture matrix includes block-shaped conductive metal aggregates, the volume of conductive particles accounts for 15% of the total volume of the road surface, and the particle size distribution of the metal aggregates is 4.75cm-9.5cm:9.5cm-13.5cm=2:5.

[0100] The synthetic gradation of the aggregate in the asphalt mixture matrix is ​​shown in Table 5.

[0101] Table 5 Synthetic gradation of asphalt mixture matrix aggregate (Example 4)

[0102] The method for laying corridor pavement materials of the electronic guided rubber wheel system comprises the following steps:

[0103] 1) Laying the base asphalt mixture: Place the asphalt mixture in the mixing plant and mix at 180°C for 55 seconds. Spread the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 and use a steel wheel roller to roll it. The first pass is static compaction, the second to fourth passes are vibratory compaction, and the fifth to sixth passes are static compaction. When the temperature drops to 70-90°C, final compaction is performed.

[0104] 2) Prepare grouting liquid: put the slurry powder and water into a blender and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0105] 3) Pouring: Pump the slurry to the surface of the paved asphalt mixture base, so that the slurry is 1-2 cm higher than the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry on the surface of the asphalt mixture base, and the surface exposed stone depth is 2-5 mm.

[0106] Comparative Example 6

[0107] In this embodiment, a corridor pavement material for an electronically guided rubber tire system includes a grouting material and a large-void asphalt mixture matrix. The grouting material is composed of 100 parts powder and 32 parts water by weight. The large-void asphalt mixture matrix has a porosity of 15%. The grouting material has a final strength of 36 MPa, a 2-hour strength of 18 MPa, and a fluidity of 11 seconds.

[0108] The grouting material powder comprises 67 parts of cement, 3 parts of acrylic polymer latex, 20 parts of blast furnace slag, 2 parts of polyoxyethylene water reducer, 1 part of nano silicon reinforcing agent, 2 parts of temperature absorber, and 5 parts of conductive particles;

[0109] The void asphalt mixture matrix includes 100 parts of aggregate, 4.6 parts of high-viscosity modified asphalt, 0 parts of surfactant binder, and 0 parts of fiber; the surfactant binder is an amphiphilic block copolymer.

[0110] The large-void asphalt mixture matrix includes block-shaped conductive metal aggregates, the volume of which accounts for 15% of the total volume of the road surface, and the particle size distribution of the metal aggregates is 4.75cm-9.5cm:9.5cm-13.5cm=2:5.

[0111] Table 6 Synthetic gradation of asphalt mixture matrix aggregate (Comparative Example 6)

[0112] The method for laying corridor pavement materials of the electronic guided rubber wheel system comprises the following steps:

[0113] 1) Laying the base asphalt mixture: Place the asphalt mixture in the mixing plant and mix at 180°C for 55 seconds. Spread the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 and use a steel wheel roller to roll it. The first pass is static compaction, the second to fourth passes are vibratory compaction, and the fifth to sixth passes are static compaction. When the temperature drops to 70-90°C, final compaction is performed.

[0114] 2) Prepare grouting liquid: put the slurry powder and water into a blender and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0115] 3) Pouring: Pump the slurry onto the surface of the paved asphalt mixture matrix, ensuring that the slurry is 1-2 cm above the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry from the asphalt mixture matrix to a depth of 2-5 mm of exposed stone. This means that the surfactant binder and fiber in the large-void asphalt mixture matrix of Example 4 are removed.

[0116] Example 5

[0117] In this embodiment, an electronically guided rubber tire system corridor pavement material includes grouting material and a large-void asphalt mixture matrix. The grouting material is composed of 100 parts powder and 29 parts water by weight. The large-void asphalt mixture matrix has a porosity of 22%. The grouting material has a final strength of 45 MPa, a 2-hour strength of 26 MPa, and a fluidity of 13 seconds.

[0118] The grouting material powder includes 70 parts of cement, 17 parts of active mineral powder, 2.5 parts of polycarboxylic acid water reducer, 6 parts of nano-silicon oxide reinforcing agent, 0.5 parts of expansion agent, and 4 parts of conductive particles. The particle size of the conductive particles in the grouting material is 1.5 mm.

[0119] The large-void asphalt mixture matrix includes 100 parts of aggregate, 3.2 parts of rubber asphalt, and 0.3 parts of steel fiber;

[0120] The large-void asphalt mixture matrix includes blocky conductive metal aggregates, the volume of which accounts for 27% of the total volume of the road surface, and the particle size distribution of the metal aggregates is 4.75 cm to 9.5 cm: 9.5 cm to 13.5 cm = 2:5;

[0121] The synthetic gradation of the aggregate in the asphalt mixture matrix is ​​shown in Table 7.

[0122] Table 7 Synthetic gradation of asphalt mixture matrix aggregate (Example 5)

[0123] The method for laying corridor pavement materials of the electronic guided rubber wheel system comprises the following steps:

[0124] 1) Laying the base asphalt mixture: Place the asphalt mixture in the mixing plant and mix at 180°C for 55 seconds. Spread the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 and use a steel wheel roller to roll it. The first pass is static compaction, the second to fourth passes are vibratory compaction, and the fifth to sixth passes are static compaction. When the temperature drops to 70-90°C, final compaction is performed.

[0125] 2) Prepare grouting liquid: put the slurry powder and water into a blender and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0126] 3) Pouring: Pump the slurry to the surface of the paved asphalt mixture base, so that the slurry is 1-2 cm higher than the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry on the surface of the asphalt mixture base, and the surface exposed stone depth is 2-5 mm.

[0127] Example 6

[0128] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The grouting material is composed of 100 parts powder and 31 parts water by weight. The large-void asphalt mixture matrix has a porosity of 20%. The grouting material has a final strength of 40 MPa, a 2-hour strength of 20 MPa, and a fluidity of 11 seconds.

[0129] The grouting material powder comprises 81 parts of cement, 7 parts of polyester latex, 9.6 parts of fly ash, 1.3 parts of sulfonate type water reducer, 1 part of metal organic framework material reinforcing agent, and 0.1 part of fiber stabilizer;

[0130] The large-void asphalt mixture matrix includes 100 parts of aggregate, 3.2 parts of base asphalt, 0.6 parts of surfactant binder, and 0.3 parts of lignin fiber; the surfactant binder is an amphiphilic block copolymer.

[0131] No conductive particles or metallic aggregates.

[0132] The synthetic gradation of the aggregate in the asphalt mixture matrix is ​​shown in Table 8.

[0133] Table 8 Synthetic gradation of asphalt mixture matrix aggregate (Example 6)

[0134] The method for laying corridor pavement materials of the electronic guided rubber wheel system comprises the following steps:

[0135] 1) Laying the base asphalt mixture: Place the asphalt mixture in the mixing plant and mix at 180°C for 55 seconds. Spread the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 and use a steel wheel roller to roll it. The first pass is static compaction, the second to fourth passes are vibratory compaction, and the fifth to sixth passes are static compaction. When the temperature drops to 70-90°C, final compaction is performed.

[0136] 2) Prepare grouting liquid: put the slurry powder and water into a blender and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0137] 3) Pouring: Pump the slurry to the surface of the paved asphalt mixture base, so that the slurry is 1-2 cm higher than the road surface and maintain it for 10 minutes. When there are no obvious bubbles on the slurry surface, remove the floating slurry on the surface of the asphalt mixture base, and the surface exposed stone depth is 2-5 mm.

[0138] The materials obtained in the above examples and comparative examples were cored or prepared to obtain test pieces for performance testing. The test results are shown in Table 9.

[0139] Table 9 Test results of various embodiments and comparative examples

[0140] It can be seen from Table 9 that there is a significant difference in the anti-rutting performance, bearing capacity and anti-fatigue performance prepared by changing the composition of the grouting material and the asphalt mixture matrix or the content of each component. The material in the embodiment has good anti-rutting performance, strong bearing capacity, good fatigue life, and good durability under heavy load, channelized and multi-axle traffic conditions.

[0141] The elastomer latex added to the grouting material described in this invention effectively enhances its flexibility and synergistically deforms with the asphalt mixture matrix under heavy loads, reducing the risk of cracking. The surfactant-based adhesive added to the asphalt mixture matrix significantly enhances adhesion at the cement-asphalt interface, significantly improving crack resistance. Furthermore, the electronically guided rubber-tire system's corridor pavement paving method is simple, requiring no specialized equipment, making it suitable for large-scale deployment and application.

[0142] While the invention has been shown and described with reference to particular embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the claims and their equivalents.

Claims

1. An electronically guided rubber wheel system corridor pavement material, characterized in that: It includes grouting material and large-void asphalt mixture matrix; The composition of the grouting material is calculated by weight: 100 parts of powder and 28-35 parts of water; wherein the powder in the grouting material includes the following components, and the weight parts of each component are as follows: The large void asphalt mixture matrix comprises the following components, and the weight proportions of each component are as follows: The void ratio of the large-void asphalt mixture matrix is ​​10% to 28%; The synthetic gradation of the large-void asphalt mixture matrix aggregate is: The aggregate passing rate of 16mm sieve is 100%. The aggregate passing rate of 13.2mm sieve hole is 70% to 100%. The aggregate passing rate of 9.5mm sieve is 10% to 50%. The aggregate passing rate of 4.75mm sieve hole is 5% to 25%. The aggregate passing rate of 2.36mm sieve hole is 4% to 20%. The aggregate passing rate of 1.18mm sieve hole is 3% to 18%. The aggregate passing rate of 0.6mm sieve hole is 3% to 16%. The aggregate passing rate of 0.3mm sieve hole is 3% to 14%. The aggregate passing rate of 0.15mm sieve hole is 2% to 12%. The aggregate passing rate of 0.075mm sieve hole is 1% to 10%. The total percentage of aggregates with different particle sizes is 100%.

2. The electronically guided rubber wheel system corridor pavement material according to claim 1, characterized in that: The final strength of the grouting material is 35MPa-45MPa, the 2h strength is 10MPa-30MPa, and the fluidity is 10s-14s.

3. The electronically guided rubber wheel system corridor pavement material according to claim 1, characterized in that: The weight ratio of the grouting material to the large-void asphalt mixture matrix is ​​10-30:70-90.

4. The electronically guided rubber wheel system corridor pavement material according to claim 1 or 2, characterized in that: The elastomer latex in the grouting material is selected from any one or more of epoxy emulsion, polyester latex, ternary copolymer elastomer latex, and acrylic polymer; The ternary copolymer elastomer latex is selected from any one or more of chlorotrifluoroethylene-vinylidene fluoride copolymer elastomer latex, vinylidene fluoride-perfluoropropylene copolymer elastomer, and vinylidene fluoride-tetravinylidene fluoride-perfluoropropylene.

5. The electronically guided rubber wheel system corridor pavement material according to claim 1 or 2, characterized in that: The active filler in the grouting material is selected from a mixture of any one or more of blast furnace slag, volcanic ash powder, fly ash, lime powder, and active mineral powder; The water reducer is selected from any one or more of sulfonate type, polycarboxylic acid type, aliphatic type, and polyoxyethylene type water reducers; The reinforcing agent is selected from any one or more of active mineral powder, nano-diatomaceous earth, nano-silicon oxide, metal organic framework material, carbon nanotube, graphene, and nano-silicon; The stabilizer is selected from any one or more of fibers, expanders, shrinkage reducers, and temperature absorbers; The conductive particles are metal conductive particles, and the particle size is less than 1.18 mm.

6. The electronically guided rubber wheel system corridor pavement material according to claim 1 or 2, characterized in that: The asphalt in the large-void asphalt mixture matrix is ​​selected from a mixture of any one or more of base asphalt, SBS asphalt, high-viscosity modified asphalt, rubber asphalt, epoxy asphalt, and polyurethane asphalt; The surface active binder is an amphiphilic block copolymer; The fiber is selected from any one or more of lignin fiber, polymer fiber, steel fiber and basalt fiber.

7. The electronically guided rubber wheel system corridor pavement material according to claim 1 or 2, characterized in that: The large-void asphalt mixture matrix also includes conductive particles, which are mixed into the aggregate as block materials, and the total volume of the conductive particles in the grouting material and the aggregate accounts for 10% to 27% of the total volume of the pavement material; The particle size distribution of the conductive particles in the aggregate is 4.75 cm to 9.5 cm: 9.5 cm to 13.5 cm = 2:

5.

8. A method for laying corridor pavement materials of an electronically guided rubber-wheel system according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) Laying the large-void asphalt mixture matrix: placing the various material components of the large-void asphalt mixture matrix in a mixing plant according to their mass fractions, mixing for 40s to 55s at 160°C to 180°C to obtain the asphalt mixture; spreading the mixed asphalt mixture on the road surface with a loose paving coefficient of 1.1 to 1.25, and rolling it with a steel wheel roller, with the first pass being static rolling, the second to fourth passes being vibratory rolling, and the fifth to sixth passes being static rolling. When the temperature drops to 70 to 90°C, final rolling is performed to obtain the paved large-void asphalt mixture matrix; (2) Preparation of grouting material: Put the powder and water according to the mass proportion into a mixer and mix for 90 seconds at a stirring speed of not less than 200 r / min to obtain grouting material; (3) Pouring: The grouting material in the above step (2) is pumped to the surface of the asphalt mixture base laid in step (1), so that the slurry is 1-2 cm higher than the road surface and maintained for 10 minutes. When there are no obvious bubbles on the surface of the slurry, the floating slurry on the surface of the asphalt mixture base is removed, and the surface exposed stone depth is 0.6-5 mm.

9. The laying method according to claim 8, characterized in that: In step (1), the surfactant binder is added in two ways: one is to add the surfactant binder into the molten asphalt and mix it evenly; the other is to spray it into the paved 40-90°C asphalt mixture matrix at a mass of 0.05-0.2kg / (cm*m2).

10. Application of the electronically guided rubber-wheeled system corridor pavement material according to any one of claims 1 to 7 in the pavement of vehicles with automatic tracking or automatic driving.

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