Asphalt concrete with high strength and high water permeability as well as preparation method and application of asphalt concrete

Abstract

The invention belongs to the technical field of road engineering, and particularly relates to asphalt concrete with high strength and high water permeability as well as a preparation method and application thereof. The high-strength and high-water-permeability asphalt mixture provided by the invention comprises high-viscosity and high-elasticity modified asphalt, graded aggregate and mineral powder, the graded aggregate comprises coarse aggregate with the size of 10 to 18 mm, coarse aggregate with the size of 10 to 15 mm, coarse aggregate with the size of 5 to 10 mm and fine aggregate with the size of 0 to 5 mm; the mineral aggregate ratio of the coarse aggregate with the particle size of 10 to 18 mm to the coarse aggregate with the particle size of 10 to 15 mm to the coarse aggregate with the particle size of 5 to 10 mm to the fine aggregate with the particle size of 0 to 5 mm to the mineral powder is 29.0 percent to 39.0 percent to 15.0 percent to 16.0 percent to 1.0 percent. The high-strength and high-water-permeability asphalt mixture provided by the invention has the advantages of simple components, easily obtained graded aggregate, simple preparation process, low cost, simple construction, easiness in operation, good water permeability, water stability and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of road engineering, and in particular relates to a high-strength and water-permeable asphalt concrete and a preparation method and application thereof. Background Art

[0002] PAC asphalt mixture, also known as Porous Asphalt Concrete, is a special type of asphalt pavement material. PAC asphalt mixture adopts a skeleton-void structure. Pavements paved with PAC asphalt mixtures have a porosity of over 18%, with a high number of contact points between aggregates. This provides excellent water permeability and noise reduction properties. On the one hand, it allows surface water to directly infiltrate the road, significantly improving the pavement's anti-skid performance and driving safety. On the other hand, it reduces the air pumping effect between the tires and the pavement, effectively reducing noise pollution. Furthermore, pavements paved with PAC asphalt mixtures possess sufficient structural strength to meet pavement performance requirements while effectively replenishing groundwater. Therefore, PAC asphalt mixtures are widely used in highways, urban expressways, and other areas requiring rapid drainage, especially on sections with high noise reduction requirements.

[0003] The main components of PAC asphalt mixtures include asphalt, aggregates (also known as aggregates), and fillers. Asphalt is a key component of PAC asphalt mixtures. It not only fills voids and provides elasticity, but also effectively strengthens the bond between aggregates, maintaining a skeleton-void structure. The type and properties of asphalt have a significant impact on the performance of the mixture. When selecting asphalt, its viscosity, softening point, and needle penetration should be considered to ensure the required performance of the mixture. Aggregates are divided into coarse and fine aggregates, which generally occupy the majority of the volume of PAC asphalt mixtures. Aggregates mainly include crushed stone and gravel, and their quality and gradation have a significant impact on the performance of the mixture. High-quality aggregates should possess excellent physical and mechanical properties, such as high strength and low water absorption. Fillers account for a relatively small proportion of the composition design of PAC asphalt mixtures. They are mainly composed of mineral powders such as mineral powder and limestone powder. Their main functions include filling voids formed by coarse and fine aggregates, improving the density of the mixture, and affecting the cohesion and adhesion of the mixture by adsorbing asphalt. A proper amount of filler can help improve the durability and anti-skid properties of the mix. However, excessive mineral powder may make the mix brittle and reduce its crack resistance.

[0004] With the growing popularity of the "sponge city" concept, drainable asphalt pavements are playing a crucial role. However, achieving optimal balance and coordination between the permeability, high-temperature stability, water stability, pavement strength, and durability of drainable asphalt pavements remains a key and challenging aspect of PAC asphalt mixture research. The structure and composition of PAC asphalt mixtures are key factors in determining their performance. Through a thorough understanding of their structural properties and optimized component selection, PAC asphalt mixtures with superior performance can be developed, effectively ensuring road safety and comfort. Summary of the Invention

[0005] In order to overcome the deficiencies and shortcomings of the prior art, the primary purpose of the present invention is to provide a high-strength and water-permeable asphalt concrete.

[0006] Another object of the present invention is to provide a method for preparing the above-mentioned high-strength and water-permeable asphalt concrete.

[0007] Another object of the present invention is to provide a method for paving a road surface using the above-mentioned high-strength and water-permeable asphalt concrete.

[0008] The fourth object of the present invention is to provide an application of the above-mentioned high-strength and water-permeable asphalt concrete.

[0009] The purpose of the present invention is achieved through the following technical solutions:

[0010] A high-strength and water-permeable asphalt concrete comprising high-viscosity and high-elasticity modified asphalt, graded aggregate and mineral powder;

[0011] The graded aggregate includes 10-18 mm coarse aggregate, 10-15 mm coarse aggregate, 5-10 mm coarse aggregate and 0-5 mm fine aggregate;

[0012] The ratio (mass ratio) of the 10-18 mm coarse aggregate, 10-15 mm coarse aggregate, 5-10 mm coarse aggregate, 0-5 mm fine aggregate and mineral powder is 29.0%: 39.0%: 15.0%: 16.0%: 1.0%;

[0013] The high-viscosity and high-elasticity modified asphalt is preferably PG100. PG100 has excellent high-temperature stability, effectively prevents road deformation and cracks, has excellent durability, can resist erosion by water and sunlight, extends the service life of the road surface, and has excellent adhesion.

[0014] The coarse aggregate and fine aggregate are preferably limestone; the hardness, crushing resistance and density of limestone meet the use requirements, and compared with other aggregates, it has better adhesion to asphalt;

[0015] The mineral powder is preferably limestone mineral powder;

[0016] The asphalt-to-stone ratio of the high-strength and water-permeable asphalt concrete is preferably 4.1%;

[0017] The method for preparing high-strength and water-permeable asphalt concrete comprises the following steps:

[0018] (1) Heat the high-viscosity and high-elasticity modified asphalt to 170-180°C;

[0019] (2) heating the graded aggregate to 185-210°C;

[0020] (3) mixing the high-viscosity and high-elasticity modified asphalt heated in step (1), the graded aggregate heated in step (2), and the mineral powder at high temperature, and discharging the mixture to obtain high-strength and water-permeable asphalt concrete;

[0021] The discharge temperature in step (3) is preferably 180-190°C;

[0022] Application of the high-strength and water-permeable asphalt concrete in the field of road engineering technology;

[0023] A method for paving a road surface with high-strength and water-permeable asphalt concrete comprises the following steps:

[0024] (1) Paving: Use a paver to spread the high-strength and water-permeable asphalt concrete at a uniform speed, avoiding pauses in the middle;

[0025] (2) Rolling: Rolling should follow the principle of "close follow, slow pressure, high frequency, low amplitude". The initial pressure should be statically pressed by a steel wheel roller for 1-2 times, and the initial pressure temperature should not be lower than 130℃. The secondary pressure should be vibrated by a tire roller or steel wheel roller for 2-3 times, and the secondary pressure temperature should not be lower than 120℃. The final pressure should be statically pressed by a steel wheel roller for 1-2 times, and the final pressure temperature should not be lower than 100℃.

[0026] (3) Joint treatment: Longitudinal joints are hot-jointed, and a 100-200mm gap is left unrolled on the paved part as the reference surface for subsequent paving. The gap is then rolled across the joint to eliminate the seam marks. Horizontal joints are flat-jointed, and the ends are cut neatly with a cutting machine. Before the next paving, the joints are coated with tack coat oil, and then paving and rolling are carried out. During the rolling process, longitudinal and horizontal joints should be avoided as much as possible.

[0027] (4) Maintenance: After compaction is completed, traffic can be opened only after the paving layer has completely cooled naturally and the concrete surface temperature is below 50°C. During the maintenance period, obvious signs should be set up to close traffic and strictly prohibit vehicles and pedestrians from passing through to avoid damage to the asphalt.

[0028] The paver described in step (1) is preferably a paver with an automatic leveling function;

[0029] The uniform paving speed in step (1) is preferably 2-4 m / min;

[0030] Before the uniform speed paving described in step (1), the following pretreatment is preferably performed:

[0031] Preheat the paver screed to no less than 100°C 0.5-1h before paving, and adjust the paver's auger height, paving thickness, width and other parameters;

[0032] The present invention has the following advantages and effects compared to the prior art:

[0033] (1) The present invention provides a high-strength and water-permeable asphalt concrete, which has simple components, easily obtainable graded aggregates, a simple preparation process, low cost, and simple and easy construction and operation.

[0034] (2) The high-strength and water-permeable asphalt concrete provided by the present invention has a porosity of more than 19%, good water permeability, and a stability of more than 7.7, indicating that it can better resist road damage such as rutting and sliding, thereby improving the service life of the road and driving safety; the water-residual stability reaches 90.9%, indicating that its water stability is also improved, and it can maintain good stability even in long-term use in humid environments (for example, rainy days). BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a cross-sectional view of the asphalt concrete provided in Example 1.

[0036] Figure 2 This is a longitudinal cross-sectional view of the asphalt concrete provided in Example 1. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0038] Example 1

[0039] 1.Raw materials

[0040] (1) The raw material composition in this embodiment is as follows:

[0041] The modified asphalt is the high-viscosity and high-elasticity modified asphalt (PG100) produced by Guangzhou Hongmian Synthetic Materials Co., Ltd.

[0042] The coarse aggregate is 10-18mm, 10-15mm, and 5-10mm coarse aggregate (limestone) produced by Xindongyun Stone Yard;

[0043] The fine aggregate is 0-5 mm fine aggregate (limestone) produced by Xindongyun Stone Quarry;

[0044] The filler is limestone powder produced by Haitao Building Materials Factory in Pingling Town, Longmen County;

[0045] (2) The mineral material ratio (mass ratio) is: 10-18 mm limestone: 10-15 mm limestone: 5-10 mm limestone: 0-5 mm limestone: mineral powder = 29.0%: 39.0%: 15.0%: 16.0%: 1.0%. The mineral material gradation and the pass rate of each sieve hole are shown in Table 1.

[0046] Table 1 Example 1 Mineral gradation pass rate of each sieve hole

[0047]

[0048] 2. Determine the gradation design

[0049] (1) Heat the high-viscosity and high-elasticity modified asphalt (PG100) to 180°C;

[0050] (2) heating 10-18 mm coarse aggregate, 10-15 mm coarse aggregate, 5-10 mm coarse aggregate, and 0-5 mm fine aggregate to 190°C;

[0051] (3) dry-mixing the graded aggregate and mineral powder heated in step (2) for 5 seconds, then adding the high-viscosity and high-elasticity modified asphalt (PG100) heated in step (1) and wet-mixing for 50 seconds, and finally discharging the material and controlling the discharge temperature to be 185°C to obtain asphalt concrete; wherein, according to the engineering design gradation, three different synthetic gradations are designed, and the upper limit, lower limit and median of the synthetic gradation are shown in Table 2; each gradation is repeated with the oil-stone ratio of previous years as the median value and the interval of plus or minus 0.5 as the interval to select the best gradation and its corresponding oil-stone ratio;

[0052] (4) Marshall specimens were made from the asphalt concretes prepared with different synthetic grades in step (3) according to JTG E20-2011, and Marshall tests were performed to calculate the void ratio (VV), interstitial ratio (VMA), saturation (VFA), stability, and flow value.

[0053] The results of the Marshall test are shown in Table 3. According to the results of the Marshall test of the primary gradation, the median gradation is determined as the gradation of the mixed material ore based on the 2.36 sieve hole pass rate and the expected porosity.

[0054] Table 2 Example 1 Different synthetic gradations each sieve hole pass rate

[0055]

[0056]

[0057] Table 3 Concrete performance indicators corresponding to different synthetic gradations in Example 1

[0058]

[0059] 3. Oil-stone ratio

[0060] (1) Using the median synthetic gradation determined in step 2 above as the concrete aggregate gradation, taking the estimated optimal asphalt aggregate ratio of 4.1% for asphalt concrete as the median, changing it by 0.5%, taking five different asphalt aggregate ratios, and preparing asphalt concrete with different asphalt aggregate ratios according to step 2 above;

[0061] (2) The asphalt concrete prepared in step (1) was used to make Marshall specimens according to JTG E20-2011 ( Figure 1 and Figure 2 ), calculate indicators such as void ratio VV, gap ratio VMA, saturation VFA, stability and flow value.

[0062] The results are shown in Table 4 below.

[0063] Table 4 Concrete performance indicators corresponding to different asphalt-aggregate ratios in Example 1

[0064]

[0065]

[0066] It can be seen from the above table that the asphalt concrete prepared under the conditions of mineral material ratio of: 10-18mm: 10-15mm: 5-10mm: 0-5mm = 29.0%: 39.0%: 15.0%: 16.0%: 1.0% and oil-stone ratio of 4.1% has the best porosity and stability, which meets the technical requirements of DBJ / T15-157-2019 "Technical Specifications for Permeable Asphalt Concrete Pavement".

[0067] Example 2

[0068] 1.Raw materials

[0069] (1) The raw material composition in this embodiment is as follows:

[0070] The modified asphalt is the high-viscosity and high-elasticity modified asphalt (PG100) produced by Guangzhou Hongmian Synthetic Materials Co., Ltd.

[0071] The coarse aggregate is 5-10 mm coarse aggregate (limestone) produced by Xindongyun Stone Yard;

[0072] The fine aggregate is 0-5 mm fine aggregate (limestone) produced by Xindongyun Stone Quarry;

[0073] The filler is limestone powder produced by Haitao Building Materials Factory in Pingling Town, Longmen County;

[0074] (2) The mineral material ratio (mass ratio) is: 5-10 mm limestone: 0-5 mm limestone: mineral powder = 85.0%: 14.0%: 1.0%. The mineral material gradation and the pass rate of each sieve hole are shown in Table 5.

[0075] Table 5 Example 2 Mineral Grading Each Sieve Hole Pass Rate

[0076]

[0077] 2. Determine the gradation design

[0078] (1) Heat the high-viscosity and high-elasticity modified asphalt (PG100) to 180°C;

[0079] (2) 5-10 mm coarse aggregate and 0-5 mm fine aggregate are heated to 190°C;

[0080] (3) dry-mixing the graded aggregate and mineral powder heated in step (2) for 5 seconds, then adding the high-viscosity and high-elasticity modified asphalt (PG100) heated in step (1) and wet-mixing for 50 seconds, and finally discharging the material and controlling the discharge temperature to be 185°C to obtain asphalt concrete; wherein, according to the engineering design gradation, three different synthetic gradations are designed, and the upper limit, lower limit and median of the synthetic gradation are shown in Table 6; each gradation is repeated with the oil-stone ratio of previous years as the median value and the interval of plus or minus 0.5 as the interval to select the best gradation and its corresponding oil-stone ratio;

[0081] (4) Marshall specimens were made from the asphalt concretes prepared with different synthetic grades in step (3) according to JTG E20-2011, and Marshall tests were performed to calculate the void ratio (VV), interstitial ratio (VMA), saturation (VFA), stability, and flow value.

[0082] The results of the Marshall test are shown in Table 7. According to the results of the Marshall test of the primary gradation, the median gradation is determined as the gradation of the mixed material ore based on the 2.36 sieve hole pass rate and the expected porosity.

[0083] Table 6 Example 2 Different synthetic gradations each sieve hole pass rate

[0084]

[0085] Table 7 Concrete performance indicators corresponding to different synthetic gradations in Example 2

[0086]

[0087] 3. Oil-stone ratio

[0088] (1) Using the median synthetic gradation determined in step 2 above as the concrete aggregate gradation, taking the estimated optimal asphalt aggregate ratio of 4.6% for asphalt concrete as the median, changing it by 0.5%, taking five different asphalt aggregate ratios, and preparing asphalt concrete with different asphalt aggregate ratios according to step 2 above;

[0089] (2) The asphalt concrete prepared in step (1) was used to make Marshall specimens according to JTG E20-2011, and the void ratio VV, gap ratio VMA, saturation VFA, stability and flow value were calculated.

[0090] The results are shown in Table 8 below.

[0091] Table 8 Concrete performance indicators corresponding to different oil-aggregate ratios

[0092]

[0093] It can be seen from the above table that the asphalt concrete prepared under the conditions of mineral material ratio: 5-10mm limestone: 0-5mm limestone: mineral powder = 85.0%: 14.0%: 1.0% and oil-stone ratio of 4.6% has the best porosity and stability, which meets the technical requirements of DBJ / T15-157-2019 "Technical Specifications for Permeable Asphalt Concrete Pavement".

[0094] Example 3

[0095] 1.Raw materials

[0096] (1) The raw material composition in this embodiment is as follows:

[0097] The modified asphalt is the high-viscosity and high-elasticity modified asphalt (PG100) produced by Guangzhou Hongmian Synthetic Materials Co., Ltd.

[0098] The coarse aggregate is 10-15mm and 5-10mm coarse aggregate (limestone) produced by Xindongyun Stone Yard;

[0099] The fine aggregate is 0-5 mm fine aggregate (limestone) produced by Xindongyun Stone Quarry;

[0100] The filler is limestone powder produced by Haitao Building Materials Factory in Pingling Town, Longmen County;

[0101] (2) The ore material ratio (mass ratio) is: 10-15 mm limestone: 5-10 mm limestone: 0-5 mm limestone: ore powder = 40.0%: 45.5%: 12.5%: 2.0%. The ore material gradation pass rate for each sieve hole is shown in Table 9.

[0102] Table 9 Example 3 Mineral Grading Each Sieve Hole Pass Rate

[0103]

[0104] 2. Determine the gradation design

[0105] (1) Heat the high-viscosity and high-elasticity modified asphalt (PG100) to 180°C;

[0106] (2) heating 10-15 mm coarse aggregate, 5-10 mm coarse aggregate, 0-5 mm fine aggregate and mineral powder to 190°C;

[0107] (3) dry-mixing the graded aggregate and mineral powder heated in step (2) for 5 seconds, then adding the high-viscosity and high-elasticity modified asphalt (PG100) heated in step (1) and wet-mixing for 50 seconds, and finally discharging the material and controlling the discharge temperature to be 185°C to obtain asphalt concrete; wherein, according to the engineering design gradation, three different synthetic gradations are designed, and the upper limit, lower limit and median of the synthetic gradation are shown in Table 10; each gradation is repeated with the oil-stone ratio of previous years as the median value and the interval of plus or minus 0.5 as the interval to select the best gradation and its corresponding oil-stone ratio;

[0108] (4) Marshall specimens were made from the asphalt concretes prepared with different synthetic grades in step (3) according to JTG E20-2011, and Marshall tests were performed to calculate the void ratio (VV), interstitial ratio (VMA), saturation (VFA), stability, and flow value.

[0109] The results of the Marshall test are shown in Table 11. According to the results of the Marshall test of the primary gradation, the 2.36 sieve hole pass rate and the expected porosity determine the lower limit gradation as the mixture mineral gradation.

[0110] Table 10 Example 3 Different synthetic gradations each sieve hole pass rate

[0111]

[0112] Table 11 Concrete performance indicators corresponding to different synthetic gradations in Example 3

[0113]

[0114]

[0115] 3. Oil-stone ratio

[0116] (1) Using the lower limit synthetic gradation determined in step 2 above as the concrete aggregate gradation, taking the estimated optimal asphalt aggregate ratio of 4.4% as the median, changing it by 0.5%, taking five different asphalt aggregate ratios, and preparing asphalt concrete with different asphalt aggregate ratios according to step 2 above;

[0117] (2) The asphalt concrete prepared in step (1) was used to prepare Marshall specimens according to JTG E20-2011, and the void ratio VV, gap ratio VMA, saturation VFA, stability and flow value, Marshall modulus, residual Marshall stability and other indicators were calculated.

[0118] The results are shown in Table 12.

[0119] Table 12 Concrete performance indicators corresponding to different asphalt-aggregate ratios in Example 3

[0120]

[0121] It can be seen from the above table that the asphalt concrete prepared under the conditions of mineral material ratio: 10-15mm limestone: 5-10mm limestone: 0-5mm limestone: mineral powder = 40.0%: 45.5%: 12.5%: 2.0% and oil-stone ratio of 4.4% has the best porosity and stability, which meets the technical requirements of DBJ / T15-157-2019 "Technical Specifications for Permeable Asphalt Concrete Pavement".

[0122] Effect embodiment

[0123] Marshall specimens were made from the concrete asphalt concretes obtained with the optimal oil ratios in Examples 1-3 according to JTG E20-2011, and Marshall tests were performed to calculate indicators such as the Marshall modulus, stability after 48 hours of immersion in water, and residual stability after immersion in water.

[0124] The results are shown in Table 13. It can be seen from the table that compared with Examples 2 and 3, the asphalt concrete provided in Example 1 has higher Marshall modulus, stability after 48 hours of immersion and residual stability after immersion, while ensuring better porosity, indicating that it has better anti-deformation ability and water stability.

[0125] Table 13 Water stability and other indicators of concrete prepared with optimal oil-stone ratio in Example 1-3

[0126] Example 1 Example 2 Example 3 Technical requirements Test methods Marshall modulus (Kn / mm) 2.20 1.6 1.8 / T0709 Stability after immersion in water for 48 hours (kN) 7.03 5.46 5.87 / T0709 Residual stability after immersion in water (%) 90.9 87.9 89.5 ≥85 T0709

[0127] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A high-strength and water-permeable asphalt concrete, characterized in that Contains high-viscosity and high-elasticity modified asphalt, graded aggregate and mineral powder; The graded aggregate includes 10-18 mm coarse aggregate, 10-15 mm coarse aggregate, 5-10 mm coarse aggregate and 0-5 mm fine aggregate; the mineral material ratio of the 10-18 mm coarse aggregate, 10-15 mm coarse aggregate, 5-10 mm coarse aggregate, 0-5 mm fine aggregate and mineral powder is 29.0%: 39.0%: 15.0%: 16.0%: 1.0%; The high-viscosity and high-elasticity modified asphalt is PG100; the coarse aggregate and fine aggregate are limestone; and the mineral powder is limestone mineral powder.

2. The method for preparing high-strength and water-permeable asphalt concrete according to claim 1, characterized in that The following steps are included: The asphalt-to-stone ratio of the high-strength and water-permeable asphalt concrete is 4.1%.

3. The method for preparing high-strength and water-permeable asphalt concrete according to claim 1, characterized in that The following steps are included: (1) Heat the high-viscosity and high-elasticity modified asphalt to 170-180°C; (2) heating the graded aggregate to 185-210°C; (3) Mixing the high-viscosity and high-elasticity modified asphalt heated in step (1), the graded aggregate heated in step (2), and the mineral powder at high temperature, and discharging the mixture to obtain high-strength and water-permeable asphalt concrete.

4. The method for preparing high-strength and water-permeable asphalt concrete according to claim 1, characterized in that: The discharge temperature in step (3) is 180-190°C.

5. Application of the high-strength and water-permeable asphalt concrete according to any one of claims 1 to 4 in the field of road engineering technology.

6. A method for paving a road surface with high strength and water permeability asphalt concrete, characterized in that The following steps are included: (1) Paving: Use a paver to spread the high-strength and water-permeable asphalt concrete according to any one of claims 1 to 4 at a uniform speed, avoiding pauses in the middle; (2) Rolling: Rolling should follow the principle of "close follow, slow pressure, high frequency, low amplitude". The initial pressure should be statically pressed by a steel wheel roller for 1-2 times, and the initial pressure temperature should not be lower than 130℃. The secondary pressure should be vibrated by a tire roller or steel wheel roller for 2-3 times, and the secondary pressure temperature should not be lower than 120℃. The final pressure should be statically pressed by a steel wheel roller for 1-2 times, and the final pressure temperature should not be lower than 100℃. (3) Joint treatment: Longitudinal joints are hot-jointed, and a 100-200mm gap is left unrolled on the paved part as the reference surface for subsequent paving. The gap is then rolled across the joint to eliminate the seam marks. Horizontal joints are flat-jointed, and the ends are cut neatly with a cutting machine. Before the next paving, the joints are coated with tack coat oil, and then paving and rolling are carried out. During the rolling process, longitudinal and horizontal joints should be avoided as much as possible. (4) Maintenance: After compaction is completed, wait for the paving layer to cool down completely naturally and the concrete surface temperature is lower than 50℃ before opening to traffic.

7. The method for paving a road surface with high-strength and water-permeable asphalt concrete according to claim 6, characterized in that: The paver described in step (1) is a paver with an automatic leveling function.

8. The method for paving a road surface with high-strength and water-permeable asphalt concrete according to claim 6, characterized in that: The uniform paving speed in step (1) is 2-4 m / min.

9. The method for paving a road surface with high-strength and water-permeable asphalt concrete according to claim 6, characterized in that: Before the uniform speed paving described in step (1), the following pretreatment is performed: Preheat the paver screed to no less than 100°C 0.5-1h before paving, and adjust the paver's spiral spreader height, paving thickness and width parameters.

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