Paving structure of hot-pressing type high-reflection ultrathin cover surface

Abstract

The utility model provides a paving structure of a hot-pressing type high-reflection ultra-thin overlay, which comprises a bonding layer connected to an original road surface, an ultra-thin wearing layer paved on the bonding layer and a pre-coated asphalt stone layer arranged on the surface of the ultra-thin wearing layer, the pre-coated asphalt stone layer is a layer formed by hard reflective particles pre-coated with asphalt, and a part of the pre-coated asphalt stone layer is embedded into the surface structure of the ultrathin wearing layer. According to the structure, the road surface brightness in the tunnel can be greatly improved, the black hole phenomenon of driving in the tunnel is relieved, and the light reflectivity can be improved by 60%-80% compared with a black road surface, so that the road surface brightness is improved under the same illumination condition, and the driving safety is enhanced; or under the same road surface brightness condition, lighting energy is saved, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the field of asphalt pavement engineering, in particular to a hot-pressed high-reflective ultra-thin cover pavement structure. Background Art

[0002] Highway tunnels lack natural light and are often dim. Combined with the natural black color of the asphalt pavement, the asphalt pavement's brightness is extremely low. When drivers enter a dimly lit highway tunnel at high speed from bright natural light, the difference in brightness inside and outside the tunnel causes a short-term visual discomfort, known as the "black hole phenomenon." Similarly, after adjusting to the low-light environment inside the tunnel, the brighter natural light outside can cause glare upon exiting the tunnel at high speed, leading to traffic hazards. To prevent these "black hole and glare" phenomena, a common measure is to increase lighting intensity inside the tunnel, especially at tunnel entrances and exits. However, black asphalt pavement naturally absorbs light across the entire spectrum, requiring high-intensity lighting and high energy consumption. Furthermore, highways require 24 / 7 safe operation, requiring continuous operation of lighting equipment, resulting in significant waste of lighting energy. Utility Model Content

[0003] The present invention aims to at least partially address one of the technical problems encountered in the aforementioned technologies. To this end, the present invention proposes a heat-pressed, highly reflective, ultra-thin pavement structure that significantly increases road surface brightness within tunnels and mitigates the "black hole" phenomenon experienced by vehicles driving in tunnels. Its light reflectivity can be increased by 60% to 80% compared to black pavement, thereby improving road surface brightness and enhancing driving safety under equivalent lighting conditions. Alternatively, it can conserve lighting energy and reduce emissions under equivalent road surface brightness conditions.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a hot-pressed high-reflective ultra-thin cover paving structure, which includes: an adhesive layer connected to the original road surface, an ultra-thin wear layer laid on the adhesive layer, and a pre-wrapped asphalt stone layer arranged on the surface of the ultra-thin wear layer, the pre-wrapped asphalt stone layer is a layer formed by hard reflective particles of pre-wrapped asphalt, and a part of the pre-wrapped asphalt stone layer is embedded in the surface structure of the ultra-thin wear layer.

[0005] According to the utility model, a hot-pressed high-reflective ultra-thin overlay paving structure is constructed on the original road surface to produce a thin overlay (adhesive layer and ultra-thin wear layer), and then hard reflective particles pre-coated with asphalt are sprinkled on the thin overlay to achieve high reflectivity of the thin overlay; wherein, the pre-coating of asphalt on the hard reflective particles can increase their adhesion to the ultra-thin wear layer. This structure is developed based on the existing mature thin-layer overlay. Its process, procedures, and required construction time are the same as those of conventional thin-layer overlay technology. After paving and rolling, it can be opened to traffic, with high construction efficiency and little interference with normal traffic. Moreover, after the structure is paved, it can greatly improve the brightness of the road surface in the tunnel, reduce the "black hole" phenomenon of driving in the tunnel, and effectively enhance driving safety. It can also be used to pave highly reflective pavement for heavy traffic, and its road performance is far superior to that of bright asphalt pavement. The only additional cost of this structure is the pre-wrapping of asphalt stones and the spreading process. Its cost is much lower than similar bright asphalt and bright coating tunnel bright paving technologies. The project is highly practical and has great promotion and application value.

[0006] In addition, the above-mentioned hot-pressed high-reflective ultra-thin cover paving structure of the present invention may also have the following additional technical features:

[0007] Optionally, the pre-coated asphalt stone layer is a layer formed by hard reflective particles pre-coated with bright asphalt, and the pre-coated asphalt accounts for 0.3%-0.6% of the stone.

[0008] Optionally, the thickness of the ultra-thin wear layer is 2 cm-2.5 cm, the porosity of the ultra-thin wear layer is 8%-13%, and the fiber content of the ultra-thin wear layer is 0.1%-0.3%.

[0009] Optionally, the hard reflective particles are sintered hard particle materials with a light reflectivity greater than 90%.

[0010] Optionally, the spreading amount of the hard reflective particles pre-coated with the asphalt stone layer is as follows: when the particle size of the hard reflective particles is 1mm-2.5mm, the spreading amount is 1.5kg / m 2 -2.5kg / m 2 When the particle size of the hard reflective particles is 3mm-5mm, the spreading amount is 1.0kg / m 2 -2.0kg / m 2 .

[0011] Optionally, the bonding layer is a high-viscosity modified emulsified asphalt bonding layer.

[0012] Furthermore, the spreading amount of the high viscosity modified emulsified asphalt tack layer is 0.8 kg / m 2 -1.2kg / m 2 .

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the paving structure of the hot-pressed high-reflective ultra-thin cover according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0015] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0016] To better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0017] The paving structure of this utility model's hot-pressed, highly reflective, ultra-thin overlay includes an adhesive layer attached to the original pavement, an ultra-thin wear layer laid on the adhesive layer, and a pre-coated asphalt aggregate layer disposed on the surface of the ultra-thin wear layer. The pre-coated asphalt aggregate layer is formed by hard, reflective particles pre-coated with asphalt, with a portion of the pre-coated asphalt aggregate layer embedded in the ultra-thin wear layer. By spreading the pre-coated asphalt aggregate layer formed by hard, reflective particles pre-coated with asphalt on the ultra-thin overlay, the utility model increases the light reflectivity of the ultra-thin overlay surface by up to 60% to 80% compared to black pavement. This improves pavement brightness and enhances driving safety under equivalent lighting conditions, or conserves lighting energy and reduces emissions under equivalent road brightness conditions.

[0018] In the embodiment of the present invention, the specific process is as follows: ultra-thin integrated equipment is in place → ironing board and emulsified asphalt are heated and prepared → mixture is spread (mixture temperature is controlled at 180℃-190℃) → reflective particles pre-wrapped with asphalt are spread (spreading amount is controlled at 1.5kg / m when the particle size of hard reflective particles is 1mm-2.5mm). 2 -2.5kg / m 2 When the particle size of the hard reflective particles is 3mm-5mm, the spreading amount is 1.0kg / m 2 -2.0kg / m2 )→Compact with compacting equipment (temperature control ≥140℃)→Wait for traffic to be opened.

[0019] Specifically, the bonding layer of the ultra-thin overlay is a high-viscosity modified emulsified asphalt bonding layer, which complies with the requirements of Table 1 below:

[0020] Table 1 High viscosity modified emulsified asphalt tack coat

[0021]

[0022] Specifically, the thickness of the ultra-thin wearing layer is 2 cm to 2.5 cm, the porosity of the ultra-thin wearing layer is 8% to 13%, and the structural depth is 1.3 to 1.4 mm. The mixture gradation and asphalt dosage of the ultra-thin wearing layer are shown in Table 2 below.

[0023] Table 2 Mineral gradation of ultra-thin wearing layer

[0024] Sieve hole (mm) 9.5 6.7 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Upper limit 100 95 61 46 36 27 20 12 10 Lower limit 100 70 32 23 15 10 6 4 2

[0025] The asphalt content in the ultra-thin wearing layer is 5.8-6.5%, and the fiber content is 0.1-0.2%.

[0026] In the embodiment of the present invention, the pre-coated asphalt stone layer is a layer formed by hard reflective particles pre-coated with bright asphalt. The pre-coated asphalt hard reflective particles refer to the required hard reflective particles whose surface is pre-soaked and bonded with a very thin asphalt film. The particle size of the pre-coated asphalt hard reflective particles can be 1mm-2.5mm or 3mm-5mm. The spreading amount of the hard reflective particles of the pre-coated asphalt stone layer is 1.5kg / m when the particle size of the hard reflective particles is 1mm-2.5mm. 2 -2.5kg / m 2 When the particle size of hard reflective particles is 3mm-5mm, the spreading amount is 1.0kg / m 2 -2.0kg / m 2 In the embodiment of the present invention, during construction, the hard reflective particles pre-coated with asphalt need to be evenly spread on the surface of the loose ultra-thin wearing layer by hand or machine, and then the hard reflective particles pre-coated with asphalt are pressed into the ultra-thin wearing layer by an integrated roller. The static pressing is completed 4-6 times, so that the light-absorbing black ultra-thin wearing layer is transformed into a highly reflective surface layer with high reflectivity.

[0027] The hard reflective particles are made of sintered hard particle materials, such as white corundum, with a light reflectivity of 92%-93%. The material specifications that the hard reflective particles must meet are shown in Table 3 below.

[0028] Table 3 Material indexes of hard reflective particles

[0029] project unit index color -- White, yellow, green, blue, etc. density <![CDATA[g / cm 3 ]]> 3.9～4.1 Mohs hardness -- ≥8.5 Melting point ℃ 2200

[0030] Among them, bright asphalt can adopt existing asphalt formula, such as bright asphalt for motor vehicle lanes.

[0031] Example 1

[0032] The following is combined with Figure 1 The utility model provides a paving structure of a hot-pressed high-reflective ultra-thin cover surface.

[0033] This embodiment proposes a hot-pressed highly reflective ultra-thin surface paving structure, which includes an adhesive layer 1 connected to the original road surface, an ultra-thin wear layer 2 laid on the adhesive layer 1, and a pre-wrapped asphalt stone layer 3 provided on the surface of the ultra-thin wear layer 2. The pre-wrapped asphalt stone layer 3 is a layer formed by hard reflective particles pre-wrapped with asphalt, and a portion of the pre-wrapped asphalt stone layer 3 is embedded in the ultra-thin wear layer 2. 2 The high viscosity modified emulsified asphalt was used as the bonding layer 1. A 2.5 cm thick ultra-thin wear layer 2 as shown in Table 2 was laid on the bonding layer 1, and 1.5 kg / m 2 The hard reflective particles pre-coated with bright asphalt are then embedded into the ultra-thin wearing layer with a roller; static pressing is completed 4-6 times to transform the light-absorbing black asphalt ultra-thin wearing layer into a highly reflective surface layer with high reflectivity.

[0034] The ordinary ultra-thin cover and the hot-pressed high-reflection ultra-thin cover in Example 1 were tested, and the test results are shown in Tables 4-1 and 4-2.

[0035] Table 4-1 Pavement structure depth test results

[0036] Road surface type Original ultra-thin pavement Reflective pavement Construction depth (mm) 1.4 1.0

[0037] Table 4-2 High reflective brightness function test results

[0038] Road surface type Ordinary road Example 1 Reflection brightness (cd / ㎡) 1.2 1.6 Illumination (lux) 96 138

[0039] It can be seen from Table 4-1 and Table 4-2 that the structural depth of the ultra-thin cover pavement structure produced according to this embodiment meets the requirements of the specifications and can ensure driving safety. In addition, it can greatly improve the brightness of the road surface. Its light reflectivity can be increased by 60% to 80% compared with the black road surface, thereby improving the road surface brightness under the same lighting conditions and enhancing driving safety; or saving lighting energy, energy saving and emission reduction under the same road surface brightness conditions; and the construction time required for this structure is the same as that of conventional thin-layer cover technology. Traffic can be opened after paving and rolling are completed, with high construction efficiency and little interference with normal traffic.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0042] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hot-pressed high-reflective ultra-thin cover paving structure, characterized in that: include: An adhesive layer connected to the original road surface, an ultra-thin wear layer laid on the adhesive layer, and a pre-coated asphalt stone layer arranged on the surface of the ultra-thin wear layer, the pre-coated asphalt stone layer is a layer formed by hard reflective particles of pre-coated asphalt, and a part of the pre-coated asphalt stone layer is embedded in the surface structure of the ultra-thin wear layer.

2. The hot-pressed high-reflective ultra-thin cover paving structure according to claim 1, characterized in that: The pre-coated asphalt stone layer is a layer formed by hard reflective particles pre-coated with bright asphalt.

3. The heat-pressed high-reflective ultra-thin cover paving structure according to claim 1, characterized in that: The thickness of the ultra-thin wear layer is 2 cm-2.5 cm, and the porosity of the ultra-thin wear layer is 8%-13%.

4. The heat-pressed high-reflective ultra-thin cover paving structure according to claim 1, characterized in that: The hard reflective particles are sintered hard particle materials with a light reflectivity greater than 90%.

5. The hot-pressed high-reflective ultra-thin cover paving structure according to claim 1 or 4, characterized in that: The spreading amount of the hard reflective particles of the pre-coated asphalt stone layer is as follows: when the particle size of the hard reflective particles is 1mm-2.5mm, the spreading amount is 1.5kg / m 2 -2.5kg / m 2 When the particle size of the hard reflective particles is 3mm-5mm, the spreading amount is 1.0kg / m 2 -2.0kg / m 2 .

6. The heat-pressed high-reflective ultra-thin cover paving structure according to claim 1, characterized in that: The bonding layer is a high-viscosity modified emulsified asphalt bonding layer.

7. The heat-pressed high-reflective ultra-thin cover paving structure according to claim 6, characterized in that: The spreading amount of the emulsified asphalt tack layer is 0.8 kg / m 2 -1.2kg / m 2 .

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