High-quality cement stabilized macadam layer structure

Abstract

The utility model discloses a high-quality cement stabilized macadam layer structure, and relates to the technical field of road building materials, the high-quality cement stabilized macadam layer structure comprises a subbase layer, a middle connecting layer and an upper base layer which are sequentially laid from bottom to top, an elastic buffer layer is arranged between the subbase layer and the middle connecting layer, an expansion joint is arranged on the upper base layer, and the expansion joint is connected with the middle connecting layer. And the expansion joint is filled with an elastic joint filling material. The problems that a cement stabilized macadam layer is prone to cracking in the environment with large temperature difference and low humidity, and then the service life of a road surface and driving safety are affected are solved.

Description

Technical Field

[0001] This application relates to the technical field of road construction materials, and particularly to a high-quality cement stabilized macadam layer structure. Background Art

[0002] As a road base material, the cement stabilized macadam layer is widely used due to its low cost, good integrity, high strength and other advantages. With the development of road engineering technology, the role of the cement stabilized macadam layer in improving the overall performance and safety of roads has become increasingly important, becoming an important part of the transportation field. A reasonable cement stabilized macadam layer structure can not only extend the service life of the road, but also improve driving safety, so it has received extensive attention and research.

[0003] At present, in order to improve the performance of the cement stabilized macadam layer, various means such as optimizing the mix ratio, using additives, and improving the construction process are often adopted. Among them, optimizing the mix ratio aims to achieve the best strength and stability by adjusting the ratio of cement and macadam; using additives improves the performance of the mixture by adding chemical modifiers; improving the construction process improves the quality of the base by controlling the compaction degree and moisture content during construction. Although these means have improved the overall performance of the cement stabilized macadam layer to a certain extent, it is still difficult to ensure the long-term stability and durability of the base in a complex and changeable actual use environment. Utility Model Content

[0004] In view of the problems existing in the prior art, this application provides a high-quality cement stabilized macadam layer structure.

[0005] The high-quality cement stabilized macadam layer structure provided by this application adopts the following technical solutions:

[0006] A high-quality cement stabilized macadam layer structure includes a bottom base layer, a middle connecting layer and an upper base layer laid in sequence from bottom to top. An elastic buffer layer is provided between the bottom base layer and the middle connecting layer. Expansion joints are provided on the upper base layer, and elastic caulking materials are poured into the expansion joints.

[0007] Optionally, the expansion joints are in a Z shape.

[0008] Optionally, rubber joint strips are also provided in the expansion joints.

[0009] Optionally, the elastic buffer layer is made of a mixture of rubber particles and cement mortar.

[0010] Optionally, an arc-shaped convex part is provided at the top of the middle connecting layer.

[0011] Optionally, a steel reinforcement cage is embedded in the middle connecting layer.

[0012] Optionally, a plurality of anchor bars are fixedly arranged on the steel reinforcement cage, and both ends of the anchor bars are respectively embedded in the bottom base layer and the upper base layer.

[0013] Optionally, a fiber reinforcing material is doped in the upper base layer.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. By providing expansion joints on the upper base layer and arranging elastic caulking materials in the expansion joints, the present application effectively adapts to the expansion and contraction caused by temperature changes, reduces the possibility of cracking. At the same time, an elastic buffer layer is added between the bottom base layer and the middle connecting layer to absorb and buffer the stress from the bottom base layer, further reducing the generation of cracks, significantly improving the stability and durability of the cement stabilized macadam layer in an environment with large temperature differences and low humidity, extending the service life of the road surface, and enhancing driving safety.

[0016] 2. By embedding a steel reinforcement cage and anchor bars in the middle connecting layer, the present application enhances the connection strength and overall stability between layers.

[0017] 3. By doping a fiber reinforcing material in the upper base layer, the present application further improves the crack resistance and durability of the surface layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the overall structure of an embodiment of the present application;

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Description of the reference numerals: 1, bottom base layer; 2, middle connecting layer; 21, steel reinforcement cage; 22, anchor bar; 23, arc-shaped convex part; 3, upper base layer; 31, expansion joint; 32, elastic caulking material; 33, rubber joint strip; 4, elastic buffer layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present application in detail with reference to the Figure 1-2 accompanying drawings.

[0022] An embodiment of the present application discloses a high-quality cement stabilized macadam layer structure. Referring to Figure 1 , it includes a bottom base layer 1, a middle connecting layer 2, and an upper base layer 3 laid in sequence from bottom to top. The bottom base layer 1, the middle connecting layer 2, and the upper base layer 3 are all cast with cement stabilized macadam. An elastic buffer layer 4 is arranged between the bottom base layer 1 and the middle connecting layer 2, and an expansion joint 31 is arranged on the upper base layer 3, achieving the effect of reducing cracking and improving stability in an environment with large temperature differences and low humidity.

[0023] Referring to Figure 2, the expansion joint 31 is in a Z shape, and its specific shape can be designed according to the actual environmental conditions. The expansion joint 31 is filled with an elastic caulking material 32. The elastic caulking material 32 filled in the expansion joint 31 can be selected from high-performance sealing materials such as polysulfide sealant and polyurethane sealant. Polysulfide sealant has excellent weather resistance and expansion and contraction performance, and is suitable for environments with large temperature differences; polyurethane sealant has good elasticity and watertightness, and is suitable for environments with large humidity changes. The specific type and performance of the elastic caulking material 32 can be selected and adjusted according to the actual engineering needs.

[0024] Refer to Figure 2 , in addition to the elastic caulking material 32, a rubber joint strip 33 is also provided in the expansion joint 31. The rubber joint strip 33 has good elasticity and softness, and can maintain the tightness of the expansion joint 31 when expanding and contracting caused by temperature changes. The thickness of the rubber joint strip 33 is generally 5mm - 10mm, and the width can be adjusted according to the actual width of the expansion joint 31, usually in the range of 20mm - 50mm.

[0025] The elastic buffer layer 4 is made of a mixture of rubber particles and cement mortar. The rubber particles can be selected with different particle sizes according to actual needs, such as 2mm - 5mm. The rubber particles have good elasticity and can effectively absorb and buffer the stress transmitted from the base course 1. The cement mortar is used to bond the rubber particles into an integral structure, enhancing the integrity and stability of the elastic buffer layer 4. The mixing ratio of the rubber particles and the cement mortar can be adjusted according to the actual engineering environment and usage requirements. Generally, the ratio of the rubber particles to the cement mortar is 1:3 to 1:5.

[0026] The upper base course 3 is composed of several crushed stones and doped fiber reinforcement materials. The selection of the crushed stones should be determined according to the actual engineering environment and load-bearing requirements. The common size range of the crushed stones is 5mm - 25mm. The doped fiber reinforcement materials can be selected from materials such as polypropylene fiber and carbon fiber. Polypropylene fiber has good crack resistance and corrosion resistance, and is suitable for complex engineering environments; carbon fiber is suitable for high-load conditions due to its high strength and high modulus characteristics. The addition amount of the fiber reinforcement materials is usually 0.1% - 0.5% of the dry weight.

[0027] Refer to Figure 1 , a steel cage 21 is embedded in the middle connecting layer 2. The steel cage 21 can be selected with different specifications of steel bars according to actual needs, such as steel bars with a diameter of 10mm - 20mm. The shape of the steel cage 21 can be designed according to the specific engineering environment, usually in a rectangular or cylindrical shape. The connection between the steel cages 21 can be welded or tied to ensure the stability and integrity between the steel cages 21. The size of the steel cage 21 can be adjusted according to the actual engineering needs, usually with a height of 20cm - 40cm and a width of 50cm - 100cm.

[0028] Referring to Figure 1 , a number of anchor bars 22 are fixedly arranged on the steel reinforcement cage 21, and both ends of the anchor bars 22 are respectively embedded in the subbase 1 and the upper base 3. The selection of the anchor bars 22 can be determined according to the actual engineering requirements, and the diameter range is usually 8mm - 15mm. The length of the anchor bars 22 can be adjusted according to the thickness of the steel reinforcement cage 21, and is usually 20cm - 40cm. The fixation between the anchor bars 22 and the steel reinforcement cage 21 can be achieved by welding or binding to ensure its stability in complex environments. The setting of the anchor bars 22 further enhances the connection strength between the layers and improves the stability of the overall structure.

[0029] Referring to Figure 1 , an arc-shaped convex part 23 is arranged at the top of the middle connecting layer 2, which further improves the overall stress dispersion ability of the structure. The size of the arc-shaped convex part 23 can be designed and adjusted according to actual requirements. Usually, its height is 5cm - 10cm and its width is 20cm - 40cm. The material of the arc-shaped convex part 23 can be selected from different materials according to actual requirements, such as polymer composite materials or high-strength steel, to enhance its compressive performance and wear resistance.

[0030] The implementation principle of a high-quality cement stabilized macadam layer structure in an embodiment of the present application is as follows: By setting expansion joints 31 on the upper base 3 and arranging elastic caulking materials 32 in the expansion joints 31, it effectively adapts to the expansion and contraction caused by temperature changes and reduces the possibility of cracking. At the same time, an elastic buffer layer 4 is added between the subbase 1 and the middle connecting layer 2 to absorb and buffer the stress from the subbase 1, further reducing the generation of cracks, significantly improving the stability and durability of the cement stabilized macadam layer in an environment with large temperature differences and low humidity, extending the service life of the road surface, and enhancing driving safety.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-quality cement-stabilized macadam layer structure, characterized in that: It includes a base course (1), a middle connecting layer (2) and a top base course (3) laid successively from bottom to top. An elastic buffer layer (4) is provided between the base course (1) and the middle connecting layer (2). Expansion joints (31) are provided on the top base course (3), and elastic caulking materials (32) are poured into the expansion joints (31).

2. A high-quality cement stabilized macadam layer structure according to claim 1, characterized in that: The expansion joints (31) are in a Z shape.

3. A high-quality cement stabilized macadam layer structure according to claim 1, characterized in that: A rubber joint strip (33) is further provided in the expansion joints (31).

4. A high-quality cement stabilized macadam layer structure according to claim 1, characterized in that: The elastic buffer layer (4) is made of a mixture of rubber particles and cement mortar.

5. A high-quality cement stabilized macadam layer structure according to claim 1, characterized in that: An arc-shaped convex part (23) is provided at the top of the middle connecting layer (2).

6. A high-quality cement stabilized macadam layer structure according to claim 1, characterized in that: A steel reinforcement cage (21) is embedded in the middle connecting layer (2).

7. A high-quality cement stabilized macadam layer structure according to claim 6, characterized in that: A number of anchor bars (22) are fixedly provided on the steel reinforcement cage (21), and both ends of the anchor bars (22) are respectively embedded in the base course (1) and the top base course (3).

8. A high-quality cement stabilized macadam layer structure according to claim 1, characterized in that: Fiber reinforcement materials are doped in the top base course (3).

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