Quick-dry antiskid pavement structure and pavement

Abstract

The utility model relates to the technical field of road engineering, and provides a quick-dry anti-skid pavement structure and a pavement, the pavement structure comprises a super-hydrophobic coating, a silane hydrophobic polyurethane porous mixture layer, an asphalt mixture layer, a waterproof layer, a cement stabilized macadam layer and a soil base layer which are sequentially paved from top to bottom. According to the quick-dry antiskid pavement structure provided by the embodiment of the utility model, the super-hydrophobic surface layer is formed through the hydrophobic characteristic of silane polyurethane of the silane hydrophobic polyurethane porous mixture layer and the coupling effect of the super-hydrophobic coating, and the surface energy of the pavement structure can be reduced, so that the hydrophobicity of the pavement structure is improved; and in combination with the excellent drainage capacity of the double-layer porous mixture, the quick-drying and anti-skid effects on the surface of the pavement structure are realized, and the anti-skid safety of the pavement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road engineering, in particular to a quick-drying anti-skid pavement structure and a pavement. Background Art

[0002] In infrastructure construction, the drainage function and anti-skid safety of the road surface are issues of great concern to the public, especially in outdoor public areas such as parks, shopping malls, and highway service areas, where the road paving must ensure the safety of pedestrians.

[0003] In the prior art, pavement structures in public areas mostly use dense-graded asphalt concrete, cement concrete, tiles and other pavement structures with poor drainage performance and small texture depth. The pavement drainage function is insufficient, and the accumulated water on the road surface cannot be drained away quickly on rainy days. The road surface is slippery for a long time, increasing the risk of pedestrian safety accidents. Utility Model Content

[0004] The utility model provides a quick-drying anti-skid pavement structure and a pavement, which are used to solve the defect in the prior art that the pavement is wet and slippery for a long time in rainy days, thereby reducing the safety of pedestrians.

[0005] The utility model provides a quick-drying anti-skid pavement structure, comprising a super-hydrophobic coating, a silane hydrophobic polyurethane porous mixture layer, an asphalt mixture layer, a waterproof layer, a cement-stabilized crushed stone layer and a soil base layer, which are paved in sequence from top to bottom.

[0006] According to a quick-drying anti-skid pavement structure provided by the utility model, the asphalt mixture layer is a porous asphalt mixture layer.

[0007] According to a quick-drying anti-skid pavement structure provided by the utility model, the porosity of the silane hydrophobic polyurethane porous mixture layer is greater than the porosity of the porous asphalt mixture layer.

[0008] According to a quick-drying anti-skid pavement structure provided by the utility model, the paving thickness of the silane hydrophobic polyurethane porous mixed material layer is 30-40 mm, and the void ratio is 20%-30%.

[0009] According to a quick-drying anti-skid pavement structure provided by the utility model, the paving thickness of the porous asphalt mixture layer is 60-100 mm, and the void ratio is 18%-25%.

[0010] According to the quick-drying anti-skid pavement structure provided by the utility model, the laying thickness of the cement-stabilized crushed stone layer is 80-100 mm.

[0011] According to a quick-drying anti-skid pavement structure provided by the utility model, it also includes a drainage unit arranged on the pavement side, and the drainage unit has a drainage channel.

[0012] According to a quick-drying anti-skid pavement structure provided by the utility model, the drainage unit also includes a filter element, and the filter element is arranged on the sides of the super-hydrophobic coating, the silane hydrophobic polyurethane porous mixture layer and the asphalt mixture layer.

[0013] According to a quick-drying anti-skid pavement structure provided by the utility model, the filter element is a wire mesh, and the pore size of the wire mesh is 0.38-1.08 mm.

[0014] The utility model also provides a road surface, comprising any one of the quick-drying anti-skid road surface structures described above.

[0015] The quick-drying and anti-skid pavement structure provided by the embodiment of the utility model forms a super-hydrophobic surface layer through the coupling effect of the hydrophobic properties of the silane polyurethane of the silane hydrophobic polyurethane porous mixture layer and the super-hydrophobic coating, which can reduce the surface energy of the pavement structure, thereby improving the hydrophobicity of the pavement structure, enhancing the fluidity and water flow rate of water on the pavement structure, and combining with the excellent drainage capacity of the double-layer porous mixture, the pavement structure surface can be quick-dry and anti-skid, thereby improving the anti-skid safety of the pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the quick-drying anti-skid pavement structure provided by the utility model.

[0018] Figure 2 It is a curve diagram of the change of BPN values ​​of different pavement structures over time provided by the utility model.

[0019] Figure numerals: 110, super hydrophobic coating; 120, silane hydrophobic polyurethane porous mixture layer; 130, asphalt mixture layer; 140, waterproof layer; 150, cement stabilized gravel layer; 160, soil base layer; 200, drainage unit; 210, drainage channel; 220, filter element. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0023] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0025] Combine the following Figure 1-Figure 2 The utility model describes a quick-drying anti-skid pavement structure.

[0026] Figure 1 The schematic diagram of the structure of the quick-drying anti-skid pavement structure provided by the utility model is illustrated as follows: Figure 1 As shown, the quick-drying anti-skid pavement structure includes a super-hydrophobic coating 110, a silane hydrophobic polyurethane porous mixture layer 120, an asphalt mixture layer 130, a waterproof layer 140, a cement-stabilized gravel layer 150 and a soil base layer 160 which are sequentially laid from top to bottom.

[0027] It is understandable that the present embodiment uses a silane hydrophobic polyurethane porous mixture layer 120 as the surface layer, and at the same time, a super-hydrophobic material is sprayed on the surface layer to form a super-hydrophobic coating 110, and a super-hydrophobic surface layer is formed by the coupling effect of the hydrophobic properties of the silane polyurethane in the silane hydrophobic polyurethane porous mixture layer 120 and the surface super-hydrophobic coating 110. The super-hydrophobic surface layer can reduce the surface energy of the pavement structure, thereby improving the hydrophobicity of the pavement structure, enhancing the fluidity and water flow rate of water on the pavement structure, and thus achieving a quick-drying effect on the road surface.

[0028] The quick-drying and anti-skid pavement structure provided by the embodiment of the utility model forms a super-hydrophobic surface layer through the coupling effect of the hydrophobic properties of the silane polyurethane of the silane hydrophobic polyurethane porous mixture layer 120 and the super-hydrophobic coating 110, which can reduce the surface energy of the pavement structure, thereby improving the hydrophobicity of the pavement structure, enhancing the fluidity and water flow rate of water on the pavement structure, and combining with the excellent drainage capacity of the double-layer porous mixture, the surface of the pavement structure can be quick-dry and anti-skid, thereby improving the anti-skid safety of the pavement.

[0029] In one embodiment of the present invention, the main component material of the super hydrophobic coating 110 is a polymer material. For example, the super hydrophobic coating 110 may include polytetrafluoroethylene (PTFE), polypropylene, titanium dioxide (TiO2), etc. In this embodiment, the tensile bonding strength of the super hydrophobic coating 110 is greater than 2.0 MPa, the stable water contact angle is greater than 150°, and the rolling contact angle is greater than 10°.

[0030] Furthermore, the spraying amount of the super hydrophobic coating 110 on the silane hydrophobic polyurethane porous mixture layer 120 is 50 g / m 2 ~200g / m 2 .

[0031] In one embodiment of the utility model, the adhesive used in the silane hydrophobic polyurethane porous mixture layer 120 is a two-component silane hydrophobic polyurethane, which has a tensile strength greater than 20MPa, an elongation at break greater than 50%, a viscosity (25°C) less than or equal to 3000MPa.s, a surface drying time (30°C, 80% humidity, 200μ film thickness) greater than or equal to 2h, and a stable water contact angle greater than 90°.

[0032] Furthermore, the stone used in the silane hydrophobic polyurethane porous mixture layer 120 is a graded aggregate after drying, the coarse aggregate needle-like content is less than or equal to 5%, and the crushing value is less than or equal to 12%. The gradation of the stone is shown in Table 1 below:

[0033] Table 1

[0034]

[0035] In an optional embodiment of the utility model, the silane hydrophobic polyurethane porous mixture layer 120 also includes color pigments, which can increase the aesthetics of the road surface, so that the road surface structure has a certain warning and beautification effect. For example, the color pigment can be inorganic pigments such as Fe2O3, Fe3O4·xH2O, Fe2O3·H2O, etc. Further, the amount of color pigment in the silane hydrophobic polyurethane porous mixture layer 120 is 3% to 5%, and the mixture oil-stone ratio of the silane hydrophobic polyurethane porous mixture layer 120 is 4.0% to 4.5%.

[0036] In one embodiment of the present invention, the asphalt mixture layer 130 is a porous asphalt mixture layer, with the silane hydrophobic polyurethane porous mixture layer 120 as the surface layer and the porous asphalt mixture layer as the lower layer, so that the porous asphalt mixture layer and the silane hydrophobic polyurethane porous mixture layer 120 form a double-layer drainage structure.

[0037] It should be noted that the first layer of the existing drainage structure is a porous asphalt mixture surface layer, and the second layer is a common dense graded asphalt mixture, so the existing drainage structure is a single-layer drainage structure.

[0038] The double-layer drainage structure of this embodiment has a much greater drainage capacity than the single-layer drainage structure. Therefore, the pavement structure of this embodiment has a better drainage capacity, and the synergistic effect of the double-layer drainage structure and the super-hydrophobic coating 110 can achieve quick-drying and anti-slip properties on the surface of the pavement structure.

[0039] The quick-drying and anti-skid pavement structure provided by the embodiment of the utility model uses a silane hydrophobic polyurethane porous mixture layer 120 as a surface layer, and at the same time, a super-hydrophobic material is sprayed on the surface layer, and a super-hydrophobic surface layer is formed by utilizing the hydrophobic properties of the silane polyurethane in the silane hydrophobic polyurethane porous mixture layer 120 and the coupling effect of the surface super-hydrophobic coating 110. The super-hydrophobic surface layer can reduce the surface energy of the pavement structure, thereby improving the hydrophobicity of the pavement structure, enhancing the fluidity and water flow rate of water on the pavement structure, and thus improving the drainage of the pavement structure; at the same time, the porous asphalt mixture layer and the silane hydrophobic polyurethane porous mixture layer 120 form a double-layer drainage structure, and cooperate with the super-hydrophobic coating 110 to further improve the surface quick-drying and anti-skid performance, and improve the anti-skid performance of the pavement in public areas on rainy days and the safety of pedestrians.

[0040] In one embodiment of the present invention, the porosity of the silane hydrophobic polyurethane porous mixture layer 120 is greater than the porosity of the porous asphalt mixture layer.

[0041] Optionally, the silane hydrophobic polyurethane porous mixture layer 120 has a laying thickness of 30-40 mm, a porosity of 20%-30%, and a dynamic modulus range of 3000-5000 MPa (20° C., 10 Hz).

[0042] Furthermore, the paving thickness of the porous asphalt mixture layer is 60-100 mm, and the void ratio is 18%-25%. In this embodiment, the paving thickness of the cement stabilized gravel layer 150 is 80-100 mm.

[0043] In another embodiment of the present invention, the waterproof layer 140 is made of SBS modified asphalt, the asphalt spraying temperature is 175°C to 180°C, and the spraying amount is 1.2 kg / m 2 , the overlap width is 5 to 7 cm.

[0044] In a specific embodiment of the present invention, the quick-drying and anti-skid capabilities of the silane hydrophobic polyurethane porous mixture layer 120 of this embodiment and ordinary drainage pavement are compared, and the rutting and Marshall specimens of the silane hydrophobic polyurethane porous mixture are formed through indoor tests. In this embodiment, the gradation of the mixture (silane hydrophobic polyurethane porous mixture) used in the silane hydrophobic polyurethane porous mixture layer 120 is shown in Table 2 below:

[0045] Table 2

[0046]

[0047] The color pigment (dye) of the mixture used in the silane hydrophobic polyurethane porous mixture layer 120 is selected to be 3% Fe2O3, the oil-stone ratio is 4.3%, the porosity is 23%, and the mixing process is: add aggregate and dye and dry mix for 30s, add polyurethane adhesive and wet mix for 30s, and add mineral powder and mix for another 30s. It should be noted that the polyurethane adhesive only needs to be mixed at room temperature, which is convenient for construction in sites with smaller working surfaces.

[0048] For horizontal comparison, the gradation, oil-stone ratio, and porosity design of ordinary drainage pavement are consistent with those of the silane hydrophobic polyurethane porous mixture of this embodiment, and the mixed mixture of this embodiment is formed into a mixture rutting plate.

[0049] It should be noted that two mixture rutting plates can be made, and a tetrafluoroethylene (PTFE) super-hydrophobic coating 110 can be sprayed onto the surface of one of the mixture rutting plates, thereby achieving performance testing of a single silane hydrophobic polyurethane porous mixture layer 120 and a silane hydrophobic polyurethane porous mixture layer 120 with a super-hydrophobic coating 110.

[0050] The quick-drying and anti-skid ability test is to measure the pendulum value at different times by using a pendulum tribometer. The specific process includes: evenly sprinkle a certain amount of water on the surface of the formed mixture rutting plate and the ordinary drainage road surface, and test the friction coefficient (BPN) by using a pendulum tribometer. Test a group every 5 minutes. The test results are as follows: Figure 2 shown.

[0051] Figure 2 In the figure, curve a represents a normal drainage pavement; curve b represents a mixture rutting plate formed by a monosilane hydrophobic polyurethane porous mixture; curve c represents a mixture rutting plate having a super hydrophobic coating 110; Figure 1 It can be seen that the BPN value of the mixture rutting plate sprayed with the super-hydrophobic coating 110 increases the fastest, and then the rising speed slows down. After 20 minutes, the BPN value remains at a high level; the BPN value of the ordinary drainage pavement increases slowly, but with the increase of time, the BPN value gradually increases, and it takes a period of time (40 to 50 minutes) to achieve a better anti-slip effect; the BPN value rising speed and final value of the mixture rutting plate formed by the monosilane hydrophobic polyurethane porous mixture (mixture rutting plate without spraying the super-hydrophobic coating 110) are between the above two.

[0052] The rate of change of the pendulum-type friction coefficient over time is used to characterize the quick-drying efficiency. By comparing the change rates of the pendulum-type friction coefficient of ordinary drainage pavement and the mixture rutting plate, the mixture rutting plate sprayed with the super-hydrophobic coating 110 in this embodiment has the highest rate of change of the friction coefficient. It can be seen that the super-hydrophobic coating 110 plus the silane hydrophobic polyurethane porous mixture layer 120 in this embodiment has excellent quick-drying and anti-skid properties. The super-hydrophobic material can reduce the surface energy of the pavement, thereby improving the hydrophobicity of the pavement, enhancing the fluidity of water on the pavement, and increasing the water flow rate. Therefore, the silane hydrophobic polyurethane porous mixture layer 120 with the super-hydrophobic coating 110 has better drainage and anti-skid capabilities than ordinary drainage pavement.

[0053] The quick-drying and anti-skid pavement structure provided by the embodiment of the utility model adopts a silane hydrophobic polyurethane porous mixture layer 120 and a sprayed super-hydrophobic coating 110, which can achieve water-permeable, quick-drying and anti-skid, enhance the safety and durability of the pavement, and effectively solve the defects of water accumulation on rainy days on the pavement of highway service areas and other scenes, and the poor safety performance.

[0054] In another specific embodiment of the present invention, the drainage performance and durability of a double-layer drainage structure having a silane hydrophobic polyurethane porous mixture layer 120 as the surface layer and a porous asphalt mixture layer as the bottom layer are compared with that of an ordinary single-layer drainage structure.

[0055] The first layer of the double-layer drainage structure of this embodiment is a silane hydrophobic polyurethane porous mixture layer 120, with a porosity of 25% and a thickness of 30 mm; the second layer is an asphalt mixture layer 130, with a thickness of 60 mm and a porosity of 20%. The first layer of the ordinary single-layer drainage structure is a porous asphalt mixture surface layer, with a porosity of 25% and a thickness of 30 mm; the second layer is an ordinary dense graded asphalt mixture, with a thickness of 60 mm and a porosity of 4.5%.

[0056] The durability of drainage pavement under realistic conditions is simulated by indoor tests, specifically a. measuring the initial water permeability coefficient of the test piece (the double-layer drainage structure of this embodiment and the common single-layer drainage structure); b. loading the plugging agent on the test piece; c. spraying water on the test piece while repeatedly applying the simulated rainy day pavement load on the test piece with a test block with a certain load; d. measuring the water permeability coefficient after the test is completed; repeating b, c, d until the water permeability coefficient is less than the required water permeability coefficient, for example, the required water permeability coefficient is 120mL / min, and evaluating the drainage durability by the number of cycles. The test results are shown in Table 3 below:

[0057] Table 3

[0058]

[0059] As can be seen from Table 3, the drainage capacity of the double-layer drainage structure of this embodiment is much greater than that of the ordinary single-layer drainage structure. At the same time, since the upper silane hydrophobic polyurethane porous mixture layer 120 can effectively intercept and filter the larger particles and impurities flowing in, the possibility of large particles entering the lower porous asphalt mixture layer is reduced, thereby protecting the drainage capacity of the lower layer, so that the double-layer drainage structure has better anti-blocking ability and more durable drainage performance. In addition, since the water flow velocity of the super-hydrophobic coating 110 is large, the double-layer drainage structure has a large dynamic water scouring force inside, and the water flow can more easily pass through and take away the fine particles of the upper layer, so that the double-layer drainage structure extends the drainage life of the pavement structure by intercepting large particles of impurities + taking away small particles of impurities.

[0060] The quick-drying and anti-skid pavement structure provided by the embodiment of the utility model improves the durability of pavement drainage through a double-layer drainage structure and has an anti-clogging function, which is of great significance to improving the quality of public services in public areas and the quality of life of the masses.

[0061] In one embodiment of the present invention, the quick-drying anti-skid pavement structure further includes a drainage unit 200 . The drainage unit 200 is disposed on the pavement side. The drainage unit 200 has a drainage channel 210 .

[0062] It can be understood that the super-hydrophobic coating 110, the silane hydrophobic polyurethane porous mixture layer 120, the asphalt mixture layer 130, the waterproof layer 140, the cement-stabilized gravel layer 150 and the soil base layer 160 form a pavement unit, and a drainage unit 200 is provided on the side of the pavement unit for draining the accumulated water in the pavement unit and improving the drainage capacity of the pavement unit.

[0063] For example, Figure 1 As shown, the drainage unit 200 is arranged on the left side of the pavement unit. Of course, in other embodiments, the drainage unit 200 can be arranged on the right side of the pavement unit, or on both the left and right sides of the pavement unit.

[0064] In this embodiment, the drainage unit 200 may be formed by using stone mortar on the side of the pavement unit, and the drainage channel 210 may be a rectangular drainage ditch structure.

[0065] Furthermore, a filter element 220 is provided on one side of the drainage unit 200 of the pavement unit. Preferably, the filter element 220 is provided on the side of the super-hydrophobic coating 110 and the silane hydrophobic polyurethane porous mixture layer 120.

[0066] For example, the filter element 220 is a filter screen disposed on the side of the super-hydrophobic coating 110 and the silane hydrophobic polyurethane porous mixture layer 120. The filter screen can be a stainless steel filter screen with a wire diameter of 0.12 to 0.19 mm and a pore size of 0.38 to 1.08 mm.

[0067] An embodiment of the utility model further provides a road surface, which includes the quick-drying and anti-skid road surface structure provided by any of the above embodiments.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A quick-drying anti-skid pavement structure, characterized in that: The invention comprises a super hydrophobic coating (110), a silane hydrophobic polyurethane porous mixture layer (120), an asphalt mixture layer (130), a waterproof layer (140), a cement-stabilized gravel layer (150) and a soil base layer (160) which are laid in sequence from top to bottom.

2. The quick-drying anti-skid pavement structure according to claim 1, characterized in that: The asphalt mixture layer (130) is a porous asphalt mixture layer.

3. The quick-drying anti-skid pavement structure according to claim 2, characterized in that: The porosity of the silane hydrophobic polyurethane porous mixture layer (120) is greater than the porosity of the porous asphalt mixture layer.

4. The quick-drying anti-skid pavement structure according to claim 3, characterized in that: The silane hydrophobic polyurethane porous mixed material layer (120) has a laying thickness of 30 to 40 mm and a porosity of 20% to 30%.

5. The quick-drying anti-skid pavement structure according to claim 3, characterized in that: The paving thickness of the porous asphalt mixture layer is 60-100 mm, and the void ratio is 18%-25%.

6. The quick-drying anti-skid pavement structure according to claim 1, characterized in that: The laying thickness of the cement-stabilized crushed stone layer (150) is 80-100 mm.

7. The quick-drying anti-skid pavement structure according to any one of claims 1 to 6, characterized in that: The invention also comprises a drainage unit (200) arranged on the road surface side, wherein the drainage unit (200) has a drainage channel (210).

8. The quick-drying anti-skid pavement structure according to claim 7, characterized in that: The drainage unit (200) further comprises a filter element (220), wherein the filter element (220) is arranged on the side surfaces of the super-hydrophobic coating (110), the silane hydrophobic polyurethane porous mixture layer (120) and the asphalt mixture layer (130).

9. The quick-drying anti-skid pavement structure according to claim 8, characterized in that: The filter element (220) is a wire mesh, and the pore size of the wire mesh is 0.38-1.08 mm.

10. A road surface, characterized in that: The quick-drying anti-skid pavement structure comprises the quick-drying anti-skid pavement structure as described in any one of claims 1 to 9.

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