Green low-carbon environment-friendly pavement structure

Abstract

The utility model relates to the technical field of road engineering, in particular to a green low-carbon environment-friendly pavement structure which comprises an embankment layer, a construction waste regeneration filler layer, a cement regeneration aggregate layer and a waste rubber asphalt mixing layer which are sequentially paved from bottom to top, the construction waste regeneration filler layer and the cement regeneration aggregate layer are bonded, the cement regeneration aggregate layer and the waste rubber asphalt mixing layer are bonded, the cement regeneration aggregate layer and the construction waste regeneration filler layer are recycled, and waste materials are recycled in combination with the waste rubber asphalt mixing layer; the method realizes recycling of resources, reduces cost, avoids damage to natural resources, realizes low-carbon and environment-friendly requirements of a pavement structure, and meets actual pavement construction requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of road engineering, and particularly relates to a green, low-carbon and environment-friendly road surface structure. Background Technique

[0002] A large amount of stone materials, asphalt and fuel will be consumed during road construction and maintenance. At the same time, a large amount of waste gas and waste materials will be generated. Under the background of "dual carbon", reducing waste gas emissions during production and construction and recycling of old materials are the only way that the road construction and maintenance industries must take to achieve carbon neutrality for mankind; currently, low carbon is a worldwide hot topic, and all industries are competing to carry out extensive research on new technologies, new processes and new materials in energy conservation and emission reduction, and the transportation industry is no exception.

[0003] For example, a Chinese invention patent application with the application number 202311376437.0 and the name of a low-carbon road surface and construction process discloses that most of China's roads adopt a semi-rigid road surface structure. Specifically, the base course and the sub-base course are composed of cement-stabilized crushed stones (also known as no-fine concrete or low-grade concrete without fine aggregates), and the surface course structure mostly adopts a combination structure of asphalt. As a road surface cementitious material, each ton of cement clinker production emits 820-840 kilograms of carbon dioxide. Even if fly ash, slag, gangue and other high-silicon waste materials are added to the clinker, currently each ton of finished cement production emits more than 612 kilograms of carbon dioxide. Cement production and use are high-energy-consuming, high-carbon-emitting and non-environment-friendly; the crushed stones as aggregates belong to natural mineral resources, and over-exploitation and use are not conducive to sustainable development; the mixing temperature of asphalt reaches 170-190°C. In recent years, there has also been warm-mix asphalt, and its temperature is about 120°C. For each ton of asphalt mixture production, every 100°C increase in temperature is equivalent to emitting 30-35 kilograms of carbon, which is very unfavorable for energy conservation and carbon reduction.

[0004] At present, the subgrade and filler parts of the environment-friendly road surface still rely on the stone structure of the traditional road surface, mostly taken from nature, such as river channels and mining, which will cause the consumption of natural resources and is not low-carbon and environment-friendly enough. Content of the Utility Model

[0005] The purpose of the utility model is to provide a green, low-carbon and environment-friendly road surface structure to solve the technical problem of the current environmental-friendly road surface's dependence on natural resources.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A green, low-carbon and environment-friendly road surface structure includes an embankment layer, a construction waste recycled filler layer, a cement recycled aggregate layer and a waste rubber asphalt mixture layer laid in sequence from bottom to top. There is adhesion between the construction waste recycled filler layer and the cement recycled aggregate layer, and between the cement recycled aggregate layer and the waste rubber asphalt mixture layer.

[0008] Further defined, the construction waste recycled filler layer includes a roadbed layer and a cushion layer. The cushion layer is located above the roadbed layer, and the particle sizes of the embankment layer, the roadbed layer, and the cushion layer decrease in sequence.

[0009] Further defined, the particle size of the embankment layer is 150 mm to 205 mm, the particle size of the roadbed layer is 50 mm to 70 mm, and the particle size of the cushion layer is 35 mm to 45 mm.

[0010] Further defined, a first bonding layer is provided between the roadbed layer and the cushion layer.

[0011] Further defined, the cement recycled aggregate layer includes a road surface subbase layer and a road surface base layer. The road surface base layer is located above the road surface subbase layer.

[0012] Further defined, the road surface subbase layer includes an upper substrate, a lower substrate, cement support piles, a roadbed support plate, and cement recycled aggregate blocks. The cement support piles are connected between the upper substrate and the lower substrate. The roadbed support plate is connected to the cement support piles. The cement recycled aggregate blocks are filled between the upper substrate and the lower substrate. The upper substrate is bonded to the road surface base layer, and the lower substrate is bonded to the cushion layer.

[0013] Further defined, the number of the cement support piles is multiple, and the multiple cement support piles are arranged in an array.

[0014] Further defined, a second bonding layer is provided between the cushion layer and the lower substrate, a third bonding layer is provided between the upper substrate and the road surface base layer, and a fourth bonding layer is provided between the road surface base layer and the waste rubber asphalt mixture layer.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. By recycling and reusing the cement recycled aggregate layer and the construction waste recycled filler layer, and combining with the waste rubber asphalt mixture layer, the present utility model realizes the recycling and reusing of waste materials, achieves the circular and repeated utilization of resources, reduces costs, avoids the destruction of natural resources, and at the same time meets the low-carbon environmental protection requirements of the road surface structure and the actual road surface construction requirements.

[0017] 2. The waste rubber asphalt mixture layer of the present utility model improves the durability of the road surface and the ability to resist fatigue cracks and reflection cracks, enhances the adaptability of the road surface under different climate conditions, reduces the accumulation and treatment costs of waste, and also reduces the overall cost of road construction; at the same time, it improves the durability and service performance of the thin layer overlay, meeting the requirements of sustainable development; in addition, the use of the waste rubber asphalt mixture layer reduces the noise on the road and improves the driving comfort, providing a more peaceful and comfortable driving environment for drivers and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view structural schematic diagram of the present utility model;

[0019] Figure 2 of the present utility model Figure 1 is the enlarged structural schematic diagram at position A;

[0020] Figure 3 is the partial enlarged structural schematic diagram of the roadbed subbase of the present utility model;

[0021] In the figure: 1, embankment layer; 2, roadbed layer; 3, cushion layer; 4, roadbed subbase; 401, upper substrate; 402, lower substrate; 403, cement support pile; 404, roadbed support plate; 5, road surface base course; 6, waste rubber asphalt mixture layer; 7, first bonding layer; 8, second bonding layer; 9, third bonding layer; 10, fourth bonding layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 - 3 , a green, low-carbon and environmentally friendly road surface structure provided by the present utility model includes an embankment layer 1, a construction waste recycled filler layer, a cement recycled aggregate layer and a waste rubber asphalt mixture layer 6 laid in sequence from bottom to top. The waste rubber asphalt mixture layer 6 serves as the road surface surface layer, and both the construction waste recycled filler layer and the cement recycled aggregate layer and between the cement recycled aggregate layer and the waste rubber asphalt mixture layer 6 are laid by bonding.

[0024] Among them, the construction waste recycled filler layer includes a roadbed layer 2 and a cushion layer 3, and the cushion layer 3 is located above the roadbed layer 2; the cement recycled aggregate layer includes a roadbed subbase 4 and a road surface base course 5, and the road surface base course 5 is located above the roadbed subbase 4.

[0025] Among them, the embankment layer 1 is composed of construction waste recycled filler, and the filler particle size is 150 mm to 205 mm, preferably 140 mm to 200 mm; the roadbed layer 2 is composed of construction waste recycled filler, and the filler particle size is 50 mm to 70 mm, preferably 55 mm to 60 mm; the cushion layer 3 is composed of construction waste recycled filler, and the filler particle size is 35 mm to 45 mm, preferably less than 35 mm to 40 mm.

[0026] Specifically, the construction waste recycled filler layer is made from materials such as concrete, bricks, and stones in abandoned buildings and structures through processes like crushing, screening, and cleaning. The processed construction waste recycled filler has certain strength, stability, and durability, meeting the requirements for road surface paving. Using construction waste recycled filler can reduce the extraction of natural stone and ore resources, reducing environmental damage. This not only avoids a large amount of landfill but also reduces the exploitation of natural resources, achieving the recyclable and renewable utilization of resources.

[0027] Both the road subbase 4 and the road base 5 are composed of cement-stabilized construction waste recycled aggregates.

[0028] Specifically, the road subbase 4 consists of an upper substrate 401, a lower substrate 402, cement support piles 403, a roadbed support plate 404, and cement recycled aggregate blocks. The number of cement support piles 403 is multiple, and multiple cement support piles 403 are arranged in an equidistant array between the upper substrate 401 and the lower substrate 402. The roadbed support plate 404 passes through the cement support piles 403 and is connected to them. The roadbed support plate 404 is located between the upper substrate 401 and the lower substrate 402, and the roadbed support plate 404 is arranged in one-to-one correspondence with the cement support piles 403. The cement recycled aggregate blocks are filled between the upper substrate 401 and the lower substrate 402, and the cement recycled aggregate blocks are located outside the cement support piles 403 and the roadbed support plate 404.

[0029] Cement-stabilized construction waste recycled aggregates are formed by processing construction waste through crushing, screening, cleaning, etc., and then through processes such as adding water and stirring, pouring and molding to form a stable cement soil body. Cement-stabilized construction waste recycled aggregates have high strength and high stability, providing strong support for the road surface.

[0030] The waste rubber asphalt mixed layer 6 uses waste rubber asphalt mixture.

[0031] Specifically, rubber asphalt mixture is also known as rubber-modified asphalt. Rubber-modified asphalt (Asphalt Rubber, abbreviated as AR) is a new type of high-quality composite material made by adding rubber powder made from waste tires as a modifier to matrix asphalt and through a series of actions such as high temperature, additives, and shear mixing in a special dedicated equipment. It can improve the service life of the road surface, reduce noise, reduce vibration, improve thermal stability and thermal cracking resistance, and improve anti-icing performance.

[0032] By recycling waste tires, not only is the accumulation and treatment cost of waste reduced, but also the overall cost of road construction is lowered. At the same time, the durability and performance of the thin layer overlay are improved. The use of waste rubber asphalt mixture reduces the environmental pollution caused by waste tires. Through the method of "turning waste into treasure", the recycling of resources is promoted, meeting the requirements of sustainable development. In addition, the use of rubber-modified asphalt reduces the noise on the road and improves the driving comfort, providing a quieter and more comfortable driving environment for drivers and passengers.

[0033] A first bonding layer 7 is provided between the roadbed layer 2 and the cushion layer 3, a second bonding layer 8 is provided between the cushion layer 3 and the lower substrate 402, a third bonding layer 9 is provided between the upper substrate 401 and the road surface base layer 5, and a fourth bonding layer 10 is provided between the road surface base layer 5 and the waste rubber asphalt mixture layer 6.

[0034] The first bonding layer 7, the second bonding layer 8, the third bonding layer 9 and the fourth bonding layer 10 are all epoxy resin adhesive layers.

[0035] Specifically, the first bonding layer 7, the second bonding layer 8, the third bonding layer 9 and the fourth bonding layer 10 are all epoxy resin adhesives. This material has good bonding force and compressive strength, increasing the viscosity of the roadbed layer 2, the cushion layer 3, the road surface sub-base layer 4, the road surface base layer 5 and the waste rubber asphalt mixture layer 6, making each layer bond tightly and not easily peel off.

[0036] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A green, low-carbon and environmentally friendly road surface structure, characterized in that, It includes an embankment layer (1), a recycled construction waste filler layer, a recycled cement aggregate layer, and a waste rubber asphalt mixture layer (6) laid in sequence from bottom to top. The recycled construction waste filler layer is bonded to the recycled cement aggregate layer, and the recycled cement aggregate layer is bonded to the waste rubber asphalt mixture layer (6).

2. The green, low-carbon and environmentally friendly road surface structure according to claim 1, characterized in that, The recycled construction waste filler layer includes a roadbed layer (2) and a cushion layer (3). The cushion layer (3) is located above the roadbed layer (2). The particle sizes of the embankment layer (1), the roadbed layer (2), and the cushion layer (3) decrease in sequence.

3. The green, low-carbon and environmentally friendly road surface structure according to claim 2, characterized in that, The particle size of the embankment layer (1) is 150 mm to 205 mm, the particle size of the roadbed layer (2) is 50 mm to 70 mm, and the particle size of the cushion layer (3) is 35 mm to 45 mm.

4. The green, low-carbon and environmentally friendly pavement structure according to claim 3, characterized in that, A first bonding layer (7) is provided between the roadbed layer (2) and the cushion layer (3).

5. The green, low-carbon and environment-friendly road surface structure according to claim 4, wherein, The recycled cement aggregate layer includes a road surface sub-base layer (4) and a road surface base layer (5). The road surface base layer (5) is located above the road surface sub-base layer (4).

6. The green, low-carbon and environmentally friendly road surface structure according to claim 5, characterized in that, The road surface sub-base layer (4) includes an upper substrate (401), a lower substrate (402), a cement support pile (403), a roadbed support plate (404), and recycled cement aggregate blocks. The cement support pile (403) is connected between the upper substrate (401) and the lower substrate (402). The roadbed support plate (404) is connected to the cement support pile (403). The recycled cement aggregate blocks are filled between the upper substrate (401) and the lower substrate (402). The upper substrate (401) is bonded to the road surface base layer (5), and the lower substrate (402) is bonded to the cushion layer (3).

7. The green, low-carbon and environment-friendly road surface structure according to claim 6, characterized in that, The number of the cement support piles (403) is multiple, and the multiple cement support piles (403) are arranged in an array.

8. The green, low-carbon and environmentally friendly road surface structure according to claim 7, characterized in that A second bonding layer (8) is provided between the cushion layer (3) and the lower substrate (402). A third bonding layer (9) is provided between the upper substrate (401) and the road surface base layer (5). A fourth bonding layer (10) is provided between the road surface base layer (5) and the waste rubber asphalt mixture layer (6).

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