Steel slag recycled material composite pavement structure

Abstract

The utility model discloses a steel slag recycled material composite pavement structure which comprises a cushion layer, a subbase layer is laid on the top of the cushion layer, a steel slag cement stabilized macadam base layer is laid on the top of the subbase layer, and an asphalt stabilized macadam transition layer is laid on the top of the steel slag cement stabilized macadam base layer. A steel slag and asphalt mixture surface layer is laid on the top of the asphalt stabilized macadam transition layer, and bonding layers are arranged between the subbase layer and the steel slag and cement stabilized macadam base layer, between the steel slag and cement stabilized macadam base layer and the asphalt stabilized macadam transition layer and between the asphalt stabilized macadam transition layer and the steel slag and asphalt mixture surface layer. According to the utility model, the vehicle load can be effectively dispersed, the road surface bearing capacity is improved, the deformation and damage are reduced, the integrity and stability of the road surface structure are enhanced, and the stable road surface performance under the complex traffic and environmental conditions is ensured.

Description

Technical Field

[0001] This utility model relates to the field of road roller technology, and in particular to composite pavement structures made of recycled steel slag materials. Background Technology

[0002] Traditional pavement structures are increasingly unable to meet the demands of growing traffic loads and complex environments. While recycled steel slag materials have application potential, their design in composite pavement structures suffers from problems such as poor synergy among structural layers, insufficient utilization of steel slag properties, unreasonable stress transfer between structural layers, and susceptibility to localized damage. Furthermore, the combination of steel slag with other materials fails to maximize its high strength and wear resistance, affecting the overall lifespan and performance of the pavement. Utility Model Content

[0003] The purpose of this invention is to address the problems that existing steel slag recycled materials, while having application potential, suffer from poor synergy among structural layers and insufficient utilization of steel slag properties in composite pavement structure design. These problems include unreasonable stress transfer between structural layers, which easily leads to localized damage. Furthermore, the combination of steel slag with other materials fails to maximize its high strength and wear resistance, thus affecting the overall lifespan and performance of the pavement. Therefore, this invention proposes a composite pavement structure using steel slag recycled materials.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A composite pavement structure made of recycled steel slag includes a subbase, a base course laid on top of the subbase, a steel slag cement-stabilized crushed stone base course laid on top of the base course, an asphalt-stabilized crushed stone transition layer laid on top of the steel slag cement-stabilized crushed stone base course, and a steel slag asphalt mixture surface course laid on top of the asphalt-stabilized crushed stone transition layer. An adhesive layer is provided between the base course and the steel slag cement-stabilized crushed stone base course, between the steel slag cement-stabilized crushed stone base course and the asphalt-stabilized crushed stone transition layer, and between the asphalt-stabilized crushed stone transition layer and the steel slag asphalt mixture surface course.

[0006] Furthermore, the subbase is specifically a graded crushed stone layer, and the base course is specifically a cement-stabilized soil layer.

[0007] Furthermore, the thickness of the steel slag cement-stabilized crushed stone base course is 150mm-180mm, and the steel slag size is 5mm-20mm.

[0008] Furthermore, the thickness of the asphalt-stabilized crushed stone transition layer is 60mm-120mm.

[0009] Furthermore, the thickness of the steel slag asphalt mixture surface layer is 40mm-160mm, and the steel slag size is 0.5mm-5mm.

[0010] Furthermore, the adhesive layer is specifically a modified emulsified asphalt layer.

[0011] Furthermore, the thickness of the pad and the base layer is 180mm-220mm, and the thickness of the adhesive layer (6) is 20mm-40mm.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model, through steel slag cement stabilized crushed stone base course and optimized structural design, can effectively distribute vehicle load, improve road bearing capacity, and reduce deformation and damage.

[0014] 2. The various structural layers of this utility model work together to reduce the adverse effects of temperature and humidity changes. The application of steel slag in the surface layer and base layer improves the wear resistance, water damage resistance and fatigue resistance of the road surface, and extends the service life of the road surface.

[0015] 3. This utility model enhances the integrity and stability of the road structure through the design of the bonding layer, ensuring stable road performance under complex traffic and environmental conditions. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the steel slag recycled material composite pavement structure proposed in this utility model;

[0017] Figure 2 This is an enlarged structural diagram of section A of the composite pavement structure made of recycled steel slag material proposed in this utility model.

[0018] In the diagram: 1. Subbase; 2. Subbase course; 3. Steel slag cement stabilized crushed stone base course; 4. Asphalt stabilized crushed stone transition course; 5. Steel slag asphalt mixture surface course; 6. Bonding layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figures 1-2The composite pavement structure made of recycled steel slag includes a subbase 1, which serves to drain, isolate water, and diffuse stress. A subbase 2 is laid on top of the subbase 1, reinforcing the connection between the base course and the subgrade. A steel slag cement-stabilized crushed stone base course 3 is laid on top of the subbase 2, providing the main load-bearing capacity. An asphalt-stabilized crushed stone transition layer 4 is laid on top of the steel slag cement-stabilized crushed stone base course 3, improving stress transfer between the base course and the surface course. A steel slag asphalt mixture surface course 5 is laid on top of the asphalt-stabilized crushed stone transition layer 4, enhancing the pavement's skid resistance, wear resistance, and rutting resistance. Adhesive layers 6 are provided between the subbase 2 and the steel slag cement-stabilized crushed stone base course 3, between the steel slag cement-stabilized crushed stone base course 3 and the asphalt-stabilized crushed stone transition layer 4, and between the asphalt-stabilized crushed stone transition layer 4 and the steel slag asphalt mixture surface course 5. These adhesive layers 6 enhance interlayer adhesion, ensuring the pavement's overall coordinated stress distribution.

[0021] Specifically, the cushion layer 1 is a graded crushed stone layer composed of graded crushed stone, and the subbase layer 2 is a cement-stabilized soil layer. In this scheme, the thickness of both the cushion layer 1 and the subbase layer 2 is 180mm-220mm.

[0022] The steel slag cement stabilized crushed stone base course 3 is composed of steel slag, cement and crushed stone. In this scheme, the total thickness is 150mm-180mm, of which the steel slag size is 5-20mm.

[0023] The asphalt-stabilized crushed stone transition layer 4 is composed of a mixture of asphalt and crushed stone. In this scheme, the total thickness is 60mm-120mm.

[0024] The steel slag asphalt mixture surface layer 5 is composed of steel slag, asphalt and mineral powder. In this scheme, the total thickness is 60mm-120mm and the steel slag size is 0.5-5mm.

[0025] The adhesive layer 6 is specifically a modified emulsified asphalt layer, and the thickness of the adhesive layer 6 is 20mm-40mm.

[0026] The working principle of this embodiment is as follows: After the road foundation construction is completed, the subbase 1 and the base course 2 are laid in sequence. The steel slag cement stabilized crushed stone base course 3 is prepared and laid according to the design mix ratio, ensuring that the compaction degree meets the standards. Next, the asphalt stabilized crushed stone transition layer 4 and the steel slag asphalt mixture surface course 5 are laid. The construction temperature, paving thickness, and compaction process of each layer are carefully controlled. Furthermore, an adhesive layer 6 is added between the base course 2 and the steel slag cement stabilized crushed stone base course 3, between the steel slag cement stabilized crushed stone base course 3 and the asphalt stabilized crushed stone transition layer 4, and between the asphalt stabilized crushed stone transition layer 4 and the steel slag asphalt mixture surface course 5 to ensure the integrity and stability of the pavement structure.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite pavement structure made of recycled steel slag, comprising a subbase (1), characterized in that, The subbase (1) is topped with a base course (2), and the base course (2) is topped with a steel slag cement stabilized crushed stone base course (3). The base course (3) is topped with an asphalt stabilized crushed stone transition layer (4), and the asphalt stabilized crushed stone transition layer (4) is topped with a steel slag asphalt mixture surface layer (5). An adhesive layer (6) is provided between the base course (2) and the steel slag cement stabilized crushed stone base course (3), between the steel slag cement stabilized crushed stone base course (3) and the asphalt stabilized crushed stone transition layer (4), and between the asphalt stabilized crushed stone transition layer (4) and the steel slag asphalt mixture surface layer (5).

2. The composite pavement structure made of recycled steel slag according to claim 1, characterized in that, The cushion layer (1) is specifically a graded crushed stone layer, and the subbase layer (2) is specifically a cement-stabilized soil layer.

3. The composite pavement structure made of recycled steel slag according to claim 1, characterized in that, The thickness of the steel slag cement stabilized crushed stone base course (3) is 150mm-180mm, and the steel slag size is 5mm-20mm.

4. The composite pavement structure made of recycled steel slag material according to claim 1, characterized in that, The thickness of the asphalt-stabilized crushed stone transition layer (4) is 60mm-120mm.

5. The composite pavement structure made of recycled steel slag according to claim 1, characterized in that, The thickness of the steel slag asphalt mixture surface layer (5) is 40mm-160mm, and the steel slag size is 0.5mm-5mm.

6. The composite pavement structure made of recycled steel slag according to claim 1, characterized in that, The adhesive layer (6) is specifically a modified emulsified asphalt layer.

7. The composite pavement structure made of recycled steel slag according to claim 6, characterized in that, The thickness of the padding layer (1) and the base layer (2) is 180mm-220mm, and the thickness of the adhesive layer (6) is 20mm-40mm.

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