Electronic guide rubber wheel system corridor pavement material and laying method

Abstract

The invention discloses an electronic guide rubber wheel system corridor pavement material. The electronic guide rubber wheel system corridor pavement material comprises a grouting material and a large-gap asphalt mixture matrix, the grouting material comprises powder and water, and the powder in the grouting material comprises cement, elastomer latex, an active filler, a water reducing agent, a reinforcing agent, a stabilizer and conductive particles; the macrovoid asphalt mixture matrix comprises aggregate, asphalt, a surface active binder and fibers; the void ratio of the macrovoid asphalt mixture matrix is 10%-28%, and the synthetic gradation of matrix aggregate is controlled. The cement-asphalt composite material has the flexibility of asphalt and the rigidity of cement, the material strength and proportion are combined, the rigidity is matched with the rigidity of a flexible material, and the adhesive force is good; and by controlling the aggregate gradation and a reasonable rolling process, under the conditions of heavy load, complete channelization and multi-axis load of a system vehicle, excellent anti-rutting effect and durability are achieved.

Description

Technical Field

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

[0002] The electronic guided rubber wheel system is a new and high-end standard of intelligent rail transit. It is carried by rubber wheels without laying dedicated physical tracks. At the same time, based on virtual track following technology, it can realize functions such as automatic tracking and autonomous guidance in the corridor (dedicated lane for system operation). The vehicle is not only a new type of "zero pollution" and "zero emission" transportation tool, but also has the advantages of short construction period, small infrastructure investment, high urban adaptability, and strong comprehensive transportation capacity. It is expected to provide core technical support for the construction of smart transportation in small and medium-sized cities. Zhuzhou's electronic guided rubber wheel system project was recommended at the Second United Nations Global Sustainable Transportation Conference.

[0003] The system vehicle has 6 axles and is twice as long as an 18-meter articulated bus. The axle type is single-axle single-wheel. The tire size and load capacity are larger than those of ordinary buses. The tire pressure is as high as 1.2MPa. It has the characteristics of full channelization, multi-axle, and heavy load. Its road loading method is quite different from that of existing buses. Therefore, the corridor pavement structure suitable for the electronic guided rubber wheel system has its own particularity, and targeted research and design are required. When ordinary asphalt materials are used, the corridor pavement will suffer from severe rutting in the early stage of opening to traffic, accompanied by problems such as shifting and congestion, especially in the platform area.

[0004] The Zhuzhou electronic guided rubber tire system experience line was put into use for the first time in China in 2018, with a vehicle frequency of 14 times / day, which was basically unloaded. After more than a year of operation, due to the special driving mode and high tire pressure of the system vehicles, the test road produced obvious rutting, with a rutting width of about 400mm and a maximum depth of 25mm. After milling and resurfacing, the rutting of the Sports Center Station reached 11mm again within two months. The initial operation plan of the Yibin electronic guided rubber tire system is 166 times / day. As the main public transportation tool for local residents, the road surface under its action is in poor condition, and the rutting depth in the platform area generally exceeds 20mm. Due to the use of mixed road rights on some sections, the number of turning buses has increased significantly, which has aggravated rutting and caused displacement. For example, the rutting depth at the intersection of Yibin Park Station is even 80mm. Rutting not only affects the road appearance, but also easily causes secondary diseases such as potholes and water damage, accelerating the destruction of the road structure. At the same time, road deformation will affect the tracking accuracy of vehicles, especially the accuracy of the system vehicles when entering the station. On rainy days, due to water accumulation in the ruts, vehicles are prone to hydroplaning and skidding, reducing driving safety; in addition, the uneven road surface caused by rutting can make passengers feel bumpy, reducing the service level and driving comfort of the vehicle. In order to further promote the application of the electronic guided rubber tire system, the rutting problem on the corridor road surface needs to be solved urgently.

[0005] Patent CN113136761A proposes to use a poured semi-flexible pavement as a paving solution for the corridor pavement of the electronic guided rubber wheel system, which can effectively solve the problem of rutting on the corridor pavement and discloses the pavement paving structure. However, in view of the heavy-load, channelized, and multi-axle traffic characteristics of the pavement, no corresponding material ratio solution is given, which may cause cracking, insufficient durability, and other problems after operation. Patent CN114716180B discloses a high-performance colored semi-flexible pavement material suitable for urban heavy-load roads, discloses the slurry composition and the method for obtaining the slurry color, but 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 features, has special heavy-load, fully channelized, and multi-axle traffic characteristics, and cannot adopt the semi-flexible material design system of ordinary pavement. It is necessary to comprehensively consider 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. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an electronically guided rubber wheel system corridor pavement material and a paving method to solve the problems of severe rutting and cracking of the existing corridor pavement.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] An electronically guided rubber wheel system corridor pavement material, comprising a grouting material and a large-void asphalt mixture matrix;

[0010] 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:

[0011]

[0012]

[0013] The large void asphalt mixture matrix comprises the following components, and the weight proportions of each component are as follows:

[0014]

[0015] The void ratio of the large-void asphalt mixture matrix is ​​10% to 28%;

[0016] The synthetic gradation of the large-void asphalt mixture matrix aggregate is:

[0017] The aggregate passing rate of 16mm sieve is 100%.

[0018] The aggregate passing rate of 13.2mm sieve hole is 70% to 100%.

[0019] The aggregate passing rate of 9.5mm sieve is 10% to 50%.

[0020] The aggregate passing rate of 4.75mm sieve hole is 5% to 25%.

[0021] The aggregate passing rate of 2.36mm sieve hole is 4% to 20%.

[0022] The aggregate passing rate of 1.18mm sieve hole is 3% to 18%.

[0023] The aggregate passing rate of 0.6mm sieve hole is 3% to 16%.

[0024] The aggregate passing rate of 0.3mm sieve hole is 3% to 14%.

[0025] The aggregate passing rate of 0.15mm sieve hole is 2% to 12%.

[0026] The aggregate passing rate of 0.075mm sieve hole is 1% to 10%.

[0027] The total percentage of aggregates with different particle sizes is 100%.

[0028] In the large-void asphalt mixture matrix, asphalt is used as the main binder, and the surfactant binder mainly improves the wettability of asphalt and enhances the adhesion with the cement interface; the fiber is distributed in the asphalt mortar after mixing, which enhances the toughness of the material and also has a certain oil absorption capacity, thereby increasing the thickness of the asphalt film and enhancing the flexibility.

[0029] Preferably, the final strength of the grouting material is 35MPa-45MPa, the 2h strength is 10MPa-30MPa, and the fluidity is 10s-14s.

[0030] Preferably, the weight ratio of the grouting material to the large-void asphalt mixture matrix is ​​10-30:70-90.

[0031] Preferably, the elastomer latex in the grouting material is used to increase the flexibility of the rigid grouting material, and is selected from 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 any one or more of chlorotrifluoroethylene-vinylidene fluoride copolymer elastomer latex, vinylidene fluoride-perfluoropropylene copolymer elastomer, and vinylidene fluoride-tetravinylidene fluoride-perfluoropropylene.

[0032] 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, volcanic ash powder, fly ash, lime powder, and active mineral powder.

[0033] Preferably, the water reducing agent 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 reducing agents.

[0034] 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.

[0035] 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 reducing agents, and temperature absorbers.

[0036] 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.

[0037] Preferably, in the large-void asphalt mixture matrix, the asphalt serving as a binder for 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 binder is an amphiphilic block copolymer; the fiber is selected from a mixture of any one or more of lignin fiber, polymer fiber, steel fiber, and basalt fiber.

[0038] Preferably, the aggregate of the large-void asphalt mixture matrix serves as the skeleton of the asphalt matrix mixture, and 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 4.75cm to 9.5cm: 9.5cm to 13.5cm = 2:5. It can effectively eliminate the induced voltage generated by the electric vehicle during charging and ensure safe operation and maintenance.

[0039] 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.

[0040] 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.

[0041] The present invention also provides a method for laying the above-mentioned electronic guided rubber wheel system corridor pavement material, comprising the following steps:

[0042] (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 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;

[0043] The surfactant binder is added in two ways: one is to add the surfactant binder to the molten asphalt and mix it evenly; the other is to add the surfactant binder at 0.05-0.2 kg / (cm*m 2 ) quality sprayed into the paved 40-90℃ asphalt mixture matrix;

[0044] (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;

[0045] (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.

[0046] 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.

[0047] The present invention also provides the application of the electronically guided rubber wheel system corridor pavement material to the pavement of vehicles with automatic tracking or automatic driving.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] (1) The corridor pavement used in the electronic guided rubber tire 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 of system vehicles, full channelization and multi-axis loads.

[0050] (2) The material used for the corridor pavement of the electronic guided rubber wheel system can achieve a larger connected porosity and better injection fullness through controlling the grading and reasonable rolling process, and has excellent bearing capacity.

[0051] (3) The method for laying the corridor pavement for the electronic guided rubber wheel system is simple and easy to implement. DETAILED DESCRIPTION

[0052] 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.

[0053] Example 1

[0054] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The composition of the grouting material is as follows by weight: 100 parts of powder, 28 parts of water, and the void ratio of the large-void asphalt mixture matrix is ​​10%. The final strength of the grouting material is 35MPa, the 2h strength is 10MPa, and the fluidity is 10s;

[0055] 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;

[0056] 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;

[0057] 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-9.5cm:9.5cm-13.5cm=2:5. ;

[0058] The synthetic gradation of aggregates in the asphalt mixture matrix is ​​shown in Table 1.

[0059] Table 1 Synthetic gradation of asphalt mixture matrix aggregate (Example 1)

[0060]

[0061] The method for laying the corridor pavement material of the electronic guided rubber wheel system comprises the following steps:

[0062] 1) Laying the base asphalt mixture: Place the asphalt mixture in the mixing pot of the mixing plant and mix it at 160℃ 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 rolling, the second to fourth passes are vibratory rolling, and the fifth to sixth passes are static rolling. When the temperature drops to 70-90℃, the final rolling is performed.

[0063] 2) Preparation of grouting liquid: put the slurry powder and water into a mixer and mix for 90 seconds at a stirring speed of not less than 200r / min;

[0064] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2cm 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 0.6-5mm.

[0065] Comparative Example 1

[0066] 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 those in Example 1.

[0067] Comparative Example 2

[0068] The void ratio of the large-void asphalt mixture matrix is ​​25%, and the gradation is not within the upper and lower limits specified in the present invention, as shown in Table 2. The SBS asphalt accounts for 3.2%. Others are the same as in Example 1.

[0069] Table 2 Synthetic gradation of asphalt mixture matrix aggregate (Comparative Example 2)

[0070]

[0071] Comparative Example 3

[0072] The vibration procedure is not used during rolling, and the number of vibration compaction passes is replaced by static pressure. Others are the same as in Example 1.

[0073] Example 2

[0074] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The composition of the grouting material is as follows by weight: 100 parts of powder, 35 parts of water, and the void ratio of the large-void asphalt mixture matrix is ​​16%. The final strength of the grouting material is 40MPa, the 2h strength is 13MPa, and the fluidity is 12s;

[0075] 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 type water reducer, 5.5 parts of graphene enhancer, and 3 parts of shrinkage stabilizer;

[0076] The large-void asphalt mixture matrix includes 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;

[0077] 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 4.75 cm to 9.5 cm: 9.5 cm to 13.5 cm = 2:5;

[0078] The synthetic gradation of aggregates in the asphalt mixture matrix is ​​shown in Table 3.

[0079] Table 3 Synthetic gradation of asphalt mixture matrix aggregate (Example 2)

[0080]

[0081] The method for laying the corridor pavement material of the electronic guided rubber wheel system comprises the following steps:

[0082] 1) Laying base asphalt mixture: Place the asphalt mixture in a mixing pot of a 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 roll it with a steel wheel roller. The first pass is static rolling, the second to fourth passes are vibration rolling, and the fifth to sixth passes are static rolling. When the temperature drops to 70-90°C, the final rolling is performed.

[0083] 2) Prepare grouting liquid: put the slurry powder and water into a mixer and mix for 90 seconds at a stirring speed of not less than 200r / min.

[0084] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2cm 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 0.6-5mm.

[0085] Comparative Example 4

[0086] 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.

[0087] Example 3

[0088] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The composition of the grouting material is as follows by weight: 100 parts of powder, 30 parts of water, and the void ratio of the large-void asphalt mixture matrix is ​​18%. The final strength of the grouting material is 38MPa, the 2h strength is 30MPa, and the fluidity is 14s;

[0089] The grouting material powder comprises 90 parts of cement, 2 parts of ternary copolymer elastomer latex, 2 parts of volcanic ash 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, 2 parts of conductive particles, and the particle size range of the conductive particles in the grouting material is 0 to 1.18 mm;

[0090] 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.

[0091] The large-void asphalt mixture matrix includes blocky conductive metal aggregates, the volume of conductive particles accounts for 13% 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;

[0092] The synthetic gradation of aggregates in the asphalt mixture matrix is ​​shown in Table 4.

[0093] Table 4 Synthetic gradation of asphalt mixture matrix aggregate (Example 3)

[0094]

[0095] The method for laying the corridor pavement material of the electronic guided rubber wheel system comprises the following steps:

[0096] 1) Laying the base asphalt mixture: Place the asphalt mixture 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 rolling, the second to fourth passes are vibratory rolling, and the fifth to sixth passes are static rolling. When the temperature drops to 70-90℃, the final rolling is performed.

[0097] 2) Prepare grouting liquid: put the slurry powder and water into a mixer and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0098] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2cm 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 2-5mm.

[0099] Comparative Example 5

[0100] The large-void asphalt mixture matrix in Example 3 includes blocky conductive metal aggregates, and the volume ratio of common aggregates with the same particle size is increased by 13%, and the ratio is 4.75cm-9.5cm:9.5cm-13.5cm=2:5; the conductive particles in the filling are removed, and the mass fraction of cement is increased to 92 parts. The rest is the same as Example 3.

[0101] Example 4

[0102] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The composition of the grouting material is as follows by weight: 100 parts of powder, 32 parts of water, and the void ratio of the large-void asphalt mixture matrix is ​​15%. The final strength of the grouting material is 36MPa, the 2h strength is 18MPa, and the fluidity is 11s;

[0103] 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. The particle size of the conductive particles in the grouting material ranges from 0.15 mm to 0.3 mm.

[0104] The large-void asphalt mixture matrix includes 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;

[0105] 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.

[0106] The synthetic gradation of aggregates in the asphalt mixture matrix is ​​shown in Table 5.

[0107] Table 5 Synthetic gradation of asphalt mixture matrix aggregate (Example 4)

[0108]

[0109] The method for laying the corridor pavement material of the electronic guided rubber wheel system comprises the following steps:

[0110] 1) Laying the base asphalt mixture: Place the asphalt mixture 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 rolling, the second to fourth passes are vibratory rolling, and the fifth to sixth passes are static rolling. When the temperature drops to 70-90℃, the final rolling is performed.

[0111] 2) Prepare grouting liquid: put the slurry powder and water into a mixer and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0112] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2cm 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 2-5mm.

[0113] Comparative Example 6

[0114] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The composition of the grouting material is as follows by weight: 100 parts of powder, 32 parts of water, and the void ratio of the large-void asphalt mixture matrix is ​​15%. The final strength of the grouting material is 36MPa, the 2h strength is 18MPa, and the fluidity is 11s;

[0115] 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;

[0116] The void asphalt mixture matrix comprises 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.

[0117] 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.

[0118] Table 6 Synthetic gradation of asphalt mixture matrix aggregate (Comparative Example 6)

[0119]

[0120] The method for laying the corridor pavement material of the electronic guided rubber wheel system comprises the following steps:

[0121] 1) Laying the base asphalt mixture: Place the asphalt mixture 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 rolling, the second to fourth passes are vibratory rolling, and the fifth to sixth passes are static rolling. When the temperature drops to 70-90℃, the final rolling is performed.

[0122] 2) Prepare grouting liquid: put the slurry powder and water into a mixer and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0123] 3) Pouring: Pump the slurry to the surface of the paved asphalt mixture matrix, so that the slurry is 1-2 cm above the road surface, and keep 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 matrix, and the surface exposed stone depth is 2-5 mm. That is, remove the surfactant binder and fiber in the large-void asphalt mixture matrix in Example 4.

[0124] Example 5

[0125] In this embodiment, an electronically guided rubber tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The composition of the grouting material is as follows by weight: 100 parts of powder, 29 parts of water, and the void ratio of the large-void asphalt mixture matrix is ​​22%. The final strength of the grouting material is 45MPa, the 2h strength is 26MPa, and the fluidity is 13s;

[0126] 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 range of the conductive particles in the grouting material is 1.5 mm.

[0127] The large-void asphalt mixture matrix includes 100 parts of aggregate, 3.2 parts of rubber asphalt, and 0.3 parts of steel fiber;

[0128] 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;

[0129] The synthetic gradation of aggregates in the asphalt mixture matrix is ​​shown in Table 7.

[0130] Table 7 Synthetic gradation of asphalt mixture matrix aggregate (Example 5)

[0131]

[0132] The method for laying the corridor pavement material of the electronic guided rubber wheel system comprises the following steps:

[0133] 1) Laying the base asphalt mixture: Place the asphalt mixture 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 rolling, the second to fourth passes are vibratory rolling, and the fifth to sixth passes are static rolling. When the temperature drops to 70-90℃, the final rolling is performed.

[0134] 2) Prepare grouting liquid: put the slurry powder and water into a mixer and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0135] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2cm 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 2-5mm.

[0136] Example 6

[0137] In this embodiment, an electronically guided rubber-tire system corridor pavement material includes a grouting material and a large-void asphalt mixture matrix. The composition of the grouting material is as follows by weight: 100 parts of powder, 31 parts of water, and the void ratio of the large-void asphalt mixture matrix is ​​20%. The final strength of the grouting material is 40MPa, the 2h strength is 20MPa, and the fluidity is 11s;

[0138] The grouting material powder includes 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;

[0139] 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.

[0140] No conductive particles or metallic aggregates.

[0141] The synthetic gradation of aggregates in the asphalt mixture matrix is ​​shown in Table 8.

[0142] Table 8 Synthetic gradation of asphalt mixture matrix aggregate (Example 6)

[0143]

[0144] The method for laying the corridor pavement material of the electronic guided rubber wheel system comprises the following steps:

[0145] 1) Laying the base asphalt mixture: Place the asphalt mixture 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 rolling, the second to fourth passes are vibratory rolling, and the fifth to sixth passes are static rolling. When the temperature drops to 70-90℃, the final rolling is performed.

[0146] 2) Prepare grouting liquid: put the slurry powder and water into a mixer and mix for 90 seconds at a stirring speed of not less than 200 r / min;

[0147] 3) Pouring: Pump the slurry to the surface of the laid asphalt mixture base, so that the slurry is 1-2cm 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 2-5mm.

[0148] 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.

[0149] Table 9 Test results of various embodiments and comparative examples

[0150]

[0151]

[0152] 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, channelization and multi-axle traffic conditions.

[0153] The elastomer latex added to the grouting material of the present invention can effectively enhance the flexibility of the grouting material, and can synergistically deform with the asphalt mixture matrix under heavy load conditions to reduce the risk of cracking. The surface active bonding material added to the asphalt mixture matrix has a more obvious enhancement effect on the cement-asphalt interface adhesion, and can greatly improve the anti-cracking ability. At the same time, the electronic guided rubber wheel system corridor pavement paving method of the present invention is simple, does not require the addition of special machinery and tools, and is suitable for large-scale promotion and application.

[0154] While the invention has been shown and described with reference to the 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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