A permeable asphalt mixture pavement structure
By optimizing the composition and structural design of permeable asphalt mixtures, and combining high-modulus modified asphalt, fiber-reinforced materials, and basalt coarse aggregates, the problems of insufficient rutting resistance and aging resistance of permeable asphalt mixtures have been solved, achieving efficient drainage function and good driving comfort, and ensuring long-term water permeability and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING SHENGKE ROAD NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-06-26
Smart Images
Figure CN224412237U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pavement structure technology, specifically to a permeable asphalt mixture pavement structure. Background Technology
[0002] With the acceleration of urbanization, the problem of rainwater drainage has become increasingly prominent. Traditional impermeable pavements are prone to water accumulation on rainy days, leading to traffic safety hazards and environmental problems. In recent years, research on permeable pavement materials has gradually increased. These materials can effectively reduce surface runoff, improve groundwater recharge, reduce the urban heat island effect, and improve the quality of urban ecology.
[0003] Currently, common permeable pavement materials mainly include porous concrete, permeable bricks, and permeable asphalt mixtures. Among them, porous concrete has a high permeability but low strength and is easily damaged; permeable bricks are easy to construct but have a high cost and poor durability; permeable asphalt mixtures combine good permeability and high mechanical properties.
[0004] However, some problems still exist in practical applications, such as insufficient resistance to rutting and aging. In addition, existing permeable asphalt mixtures often lack reasonable interlayer structure in their design, resulting in a decline in water permeability after long-term use. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides a permeable asphalt mixture pavement structure. By optimizing the composition and structural design of the permeable asphalt mixture, its rutting resistance and aging resistance are improved. Furthermore, by rationally setting the interlayer structure, the permeability and stability during long-term use are ensured.
[0006] To achieve the above objectives, this application provides the following technical solution: a permeable asphalt mixture pavement structure, comprising a surface layer, an intermediate layer, and a base layer, wherein the surface layer comprises high-modulus modified asphalt, the interior of which is filled with fiber-reinforced material; the intermediate layer comprises a permeable layer, a filter layer is laid on the bottom surface of the permeable layer, a drainage layer is laid on the bottom surface of the filter layer, the interior of the permeable layer contains basalt coarse aggregate and an appropriate proportion of fine aggregate; and the base layer comprises cement and gravel.
[0007] The above scheme improves the toughness and shear resistance of the surface layer by using high-modulus modified asphalt and fiber-reinforced materials, thereby enhancing the device's rutting resistance and aging resistance, and extending the service life of the pavement. The combination of basalt coarse and fine aggregates forms a skeleton void structure, giving the permeable layer excellent permeability, while the base layer provides strong support. The entire system works synergistically to achieve efficient drainage and good driving comfort. Through the cooperation of these layers, a more reasonable interlayer structure is achieved, ensuring long-term water permeability and stability, and reducing the risk of urban flooding.
[0008] Furthermore, the interior of the high-modulus modified asphalt is filled with fluorescent powder.
[0009] The above method utilizes fluorescent powder to reflect light at night, improving road safety.
[0010] Furthermore, the interior of the permeable layer is filled with waste tire rubber particles.
[0011] The above method improves the elasticity and shock absorption performance of the permeable layer by filling it with waste tire rubber particles, thus optimizing the actual use effect.
[0012] Furthermore, the thickness of the surface layer is 4 cm, and the thickness of the base layer is 20 cm.
[0013] The above scheme allows for the optimization of the interlayer structure distribution by limiting the thickness values of the surface layer and the base layer.
[0014] Furthermore, the thickness of the permeable layer is 8cm, the thickness of the filter layer is 2cm, and the thickness of the drainage layer is 5cm.
[0015] The above scheme limits the thickness values of the permeable layer, filter layer, and drainage layer, enabling a more uniform distribution of the internal structure of the intermediate layer.
[0016] Furthermore, the filter layer is made of graded fine sand or highly permeable crushed stone, and the drainage layer is made of large-pore crushed stone.
[0017] The above scheme uses graded fine sand or highly permeable gravel to form a granular filtration system, preventing sand and gravel from seeping into the permeable layer. The drainage layer uses large-pore gravel to improve horizontal drainage capacity, guide water flow into the external drainage system, and prevent long-term water retention from causing structural damage.
[0018] Furthermore, a first tack coat is provided between the surface layer and the intermediate layer, and the surface layer and the intermediate layer are connected by the first tack coat.
[0019] The above scheme enhances the bonding force between the surface layer and the intermediate layer by setting the first tack coat oil, thereby improving the stability of the structure.
[0020] Furthermore, a second tack coat is provided between the intermediate layer and the base layer, and the intermediate layer and the base layer are connected by the second tack coat.
[0021] The above scheme enhances the bond between the intermediate layer and the base layer by adding a second tack coat, thereby improving the stability of the structure.
[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0023] This permeable asphalt mixture pavement structure improves the toughness and shear resistance of the surface layer through the use of high-modulus modified asphalt and fiber-reinforced materials, enhancing the device's rutting resistance and aging resistance, and extending the pavement's service life. Simultaneously, the inclusion of fluorescent powder enhances pavement safety by reflecting light at night. The combination of basalt coarse and fine aggregates forms a skeletal porous structure, giving the permeable layer excellent permeability. Furthermore, the inclusion of waste tire rubber particles within the permeable layer improves its elasticity and shock absorption, optimizing its practical performance. The base layer provides strong support. The entire system works synergistically to achieve efficient drainage and good driving comfort. Through the coordinated efforts of these layers, a more rational interlayer structure is achieved, ensuring long-term permeability and stability, and reducing the risk of urban flooding. Attached Figure Description
[0024] Figure 1 This is a top view of the overall structure of this application.
[0025] Figure 2 This is a schematic diagram of the overall exploded structure of the present application.
[0026] Figure 3 This is a schematic diagram of the first partial exploded structure of the present application.
[0027] Figure 4 This is a schematic diagram of the second partial exploded structure of the present application;
[0028] Figure 5 This is a schematic cross-sectional view of the overall structure of this application.
[0029] In the picture:
[0030] 1. Surface layer; 101. High modulus modified asphalt; 102. Fiber reinforced material; 103. Fluorescent powder; 2. Intermediate layer; 201. Permeable layer; 202. Filter layer; 203. Drainage layer; 2011. Basalt coarse aggregate; 2012. Fine aggregate; 2013. Waste tire rubber granules; 3. Base layer; 301. Cement; 302. Gravel; 4. First tack coat; 5. Second tack coat. Detailed Implementation
[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0032] Please see Figure 1 , Figure 2 and Figure 5 This embodiment of a permeable asphalt mixture pavement structure includes a surface layer 1, an intermediate layer 2, and a base layer 3. The surface layer 1 includes high-modulus modified asphalt 101, which is made of SBS modified asphalt with a softening point of not less than 70°C, a ductility greater than 100cm at 10°C, and a penetration of 40-60dmm at 25°C. This improves the wear resistance, skid resistance, and aging resistance of the surface layer 1. The high-modulus modified asphalt 101 is internally filled with fiber-reinforced material 102. Polypropylene fibers with a length of 10-30 mm and a diameter of 20-30 μm are selected and added at a rate of 0.3%-0.5% of the total weight of the asphalt mixture. The fiber reinforcement material 102 increases the toughness of the high modulus modified asphalt 101. The high modulus modified asphalt 101 is filled with fluorescent powder 103, which reflects light at night and improves the safety of the road surface. After the surface layer 1 is laid, it needs to be compacted with a heavy roller to a density of over 95%.
[0033] It should be noted that the surface layer 1 improves the wear resistance and anti-skid performance of the road surface, the intermediate layer 2 is responsible for quickly draining water from the road surface, and the base layer 3 provides sufficient load-bearing capacity and support. The surface layer 1, intermediate layer 2 and base layer 3 work together to achieve a more reasonable interlayer structure, ensuring long-term water permeability and stability, and reducing the risk of urban flooding.
[0034] Please see Figure 2 , Figure 4 and Figure 5The intermediate layer 2 includes a permeable layer 201, a filter layer 202 laid on the bottom surface of the permeable layer 201, and a drainage layer 203 laid on the bottom surface of the filter layer 202. The filter layer 202 is made of graded fine sand or highly permeable gravel, and the drainage layer 203 is made of large-pore gravel. The filter layer 202, made of graded fine sand or highly permeable gravel, can form a granular filtration system to prevent sand and gravel 302 from seeping into the permeable layer 201. The drainage layer 203, made of large-pore gravel, can improve horizontal drainage capacity, guide water flow into the external drainage system, and prevent long-term water retention from causing structural damage. The permeable layer 201 has a pore structure inside. The basalt coarse aggregate 2011 and an appropriate proportion of fine aggregate 2012 work together to form a skeleton void structure, ensuring that water can pass through quickly. During laying, attention should be paid to flatness and compaction to avoid loosening. The interior of the permeable layer 201 is filled with waste tire rubber granules 2013. The filling of waste tire rubber granules 2013 can improve the elasticity and shock absorption performance of the permeable layer 201, optimize the actual use effect, and at the same time, by adding waste tire rubber granules 2013, the effect of waste resource reuse is realized, improving environmental protection benefits.
[0035] It should be noted that the basalt crushed stone selected in basalt coarse aggregate 2011 has a maximum particle size of no more than 26.5 mm, a crushing value of less than 15%, and a Los Angeles abrasion loss of less than 30%. The fine aggregate 2012 uses natural river sand with a fineness modulus of 2.5-3.0 and a mud content of less than 1%.
[0036] Please see Figure 1 , Figure 2 and Figure 3 The base layer 3 includes cement 301 and gravel 302. The base layer 3 uses well-graded gravel 302 and a certain proportion of cement 301 to improve the overall strength and stability of the base layer. When laying, the base layer 3 should be laid first, and then the intermediate layer 2 and the surface layer 1 should be laid in sequence.
[0037] Please see Figure 1 , Figure 2 and Figure 3The thickness of surface layer 1 is 4cm, and the thickness of base layer 3 is 20cm. Limiting the thickness values of surface layer 1 and base layer 3 optimizes the distribution of the interlayer structure. The thickness of permeable layer 201 is 8cm, filter layer 202 is 2cm, and drainage layer 203 is 5cm. Limiting the thickness values of permeable layer 201, filter layer 202, and drainage layer 203 allows for a more uniform distribution of the internal structure of intermediate layer 2. A first tack coat 4 is provided between surface layer 1 and intermediate layer 2, connecting them. The first tack coat 4 enhances the bonding force between surface layer 1 and intermediate layer 2, thereby improving the stability of the structure. A second tack coat 5 is provided between intermediate layer 2 and base layer 3, connecting them. The second tack coat 5 enhances the bonding force between intermediate layer 2 and base layer 3, thereby improving the stability of the structure.
[0038] It should be noted that during construction, the construction site should first be cleaned to ensure the ground is flat and clean. Then, the base course 3 should be laid, and well-graded gravel 302 should be spread according to the design requirements, mixed with a certain proportion of cement 301, and compacted with a vibratory roller. Next, the second tack coat 5 should be evenly sprayed on the upper surface of the base course 3, at a rate of approximately 0.5 L / m². After the second tack coat 5 has dried, the next step should be carried out. Then, the intermediate layer 2 should be laid, and the pre-prepared drainage layer 203 and filter layer 202 should be spread on the second tack coat 5 in sequence. Finally, the mixed basalt coarse aggregate 201 should be laid. 1. The mixture of fine aggregate 2012 and waste tire rubber granules 2013 is evenly spread on the filter layer 202 and compacted with a light roller. Then, the first tack coat oil 4 is sprayed on the upper surface of the intermediate layer 2 in the same amount as the previous step. Finally, the surface layer 1 is laid. The mixture of high modulus modified asphalt 101, fiber reinforced material 102 and fluorescent powder 103 is evenly spread on the intermediate layer 2 and compacted to a dense density with a heavy roller. After the paving is completed, the road is closed to traffic for 24 hours for natural curing. During this period, no vehicles are allowed to drive. After the curing is completed, a comprehensive inspection is carried out to ensure that all indicators meet the design requirements.
[0039] In this embodiment, a permeable asphalt mixture pavement structure improves the toughness and shear resistance of the surface layer 1 by incorporating high-modulus modified asphalt 101 and fiber-reinforced material 102, thereby enhancing the device's rutting resistance and aging resistance and extending the pavement's service life. Simultaneously, the fluorescent powder 103 reflects light at night, improving pavement safety. The combination of basalt coarse aggregate 2011 and fine aggregate 2012 forms a skeleton void structure, giving the permeable layer 201 excellent permeability. Furthermore, the permeable layer 201 contains waste tire rubber particles 2013, which improves its elasticity and shock absorption performance, optimizing its practical use. The base layer 3 provides strong support. The entire system works synergistically to achieve efficient drainage and good driving comfort. Through the cooperation of these layers, a more rational interlayer structure is achieved, ensuring long-term water permeability and stability, and reducing the risk of urban flooding.
[0040] The working principle of the above embodiment is as follows: rainwater infiltrates through the micropores formed in the surface layer 1, and is then rapidly guided to the base layer 3 for slow drainage through the intermediate layer 2. This provides a systematic solution for the long-term performance of urban permeable pavements. Specifically, high-modulus modified asphalt 101 and fiber-reinforced material 102 work together to form a dense microporous structure, which can quickly guide rainwater infiltration, prevent silt from clogging the pores, and improve the toughness and shear resistance of the surface layer 1. At the same time, the fluorescent powder 103 can reflect light at night, improving the safety of the road surface. The skeleton void structure formed by basalt coarse aggregate 2011 and fine aggregate 2012 gives the intermediate layer 2 excellent permeability and forms a high-speed drainage channel, which quickly guides the rainwater infiltrated from the surface layer 1 to the base layer 3. With the help of the filter layer 202 and drainage layer 203, the permeability effect can be further optimized, while the stable base layer 3 provides strong support. The entire system works synergistically to achieve efficient drainage and good driving comfort.
[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0042] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A permeable asphalt mixture pavement structure, comprising a surface layer (1), an intermediate layer (2), and a base layer (3), characterized in that: The surface layer (1) includes high modulus modified asphalt (101), the interior of which is filled with fiber reinforced material (102). The intermediate layer (2) includes a permeable layer (201), the bottom surface of which is covered with a filter layer (202), the bottom surface of which is covered with a drainage layer (203), the interior of which is provided with basalt coarse aggregate (2011) and a suitable proportion of fine aggregate (2012). The base layer (3) includes cement (301) and gravel (302).
2. The permeable asphalt mixture pavement structure according to claim 1, characterized in that: The thickness of the surface layer (1) is 4 cm, and the thickness of the base layer (3) is 20 cm.
3. The permeable asphalt mixture pavement structure according to claim 1, characterized in that: The thickness of the permeable layer (201) is 8cm, the thickness of the filter layer (202) is 2cm, and the thickness of the drainage layer (203) is 5cm.
4. The permeable asphalt mixture pavement structure according to claim 1, characterized in that: The filter layer (202) is made of graded fine sand or highly permeable crushed stone, and the drainage layer (203) is made of large-pore crushed stone.
5. The permeable asphalt mixture pavement structure according to claim 1, characterized in that: A first tack coat (4) is provided between the surface layer (1) and the intermediate layer (2), and the surface layer (1) and the intermediate layer (2) are connected by the first tack coat (4).
6. The permeable asphalt mixture pavement structure according to claim 1, characterized in that: A second tack coat (5) is provided between the intermediate layer (2) and the base layer (3), and the intermediate layer (2) and the base layer (3) are connected by the second tack coat (5).