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Full-thickness asphalt pavement structure with steel wire mesh reinforced asphalt concrete as base layer

A technology of asphalt concrete and asphalt pavement, which is applied to cohesive pavement paved on site, roads, roads, etc., and can solve the problem of durability (high requirements for fatigue resistance, increased difficulty of financing for investment departments, increased total thickness of pavement structure, etc.) problems, to achieve long service life, simple structure, and improve the structural strength of the pavement

Active Publication Date: 2022-07-08
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, the existing long-life asphalt pavement structure and the application of asphalt pavement with steel mesh structure have the following problems: First, the main structure of the existing long-life asphalt pavement has high requirements for durability (fatigue resistance), and the traditional pavement design ideas The total thickness of the pavement structure increases significantly, and the initial investment in the project construction is large, which increases the difficulty of financing for the investment department; the asphalt pavement with steel mesh structure has been applied, mainly to install the steel mesh on the upper structure of the asphalt pavement, and pay more attention to the local impact of the steel mesh The effectiveness of reinforcement and crack resistance to limit the width of cracks (anti-temperature shrinkage cracks and reflection cracks); the steel wire mesh used is also mainly double-twisted steel wire mesh, with large mesh, thick steel wire diameter, and large distribution spacing, which is closely related to the structural performance of the pavement. Mismatch of needs

Method used

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  • Full-thickness asphalt pavement structure with steel wire mesh reinforced asphalt concrete as base layer
  • Full-thickness asphalt pavement structure with steel wire mesh reinforced asphalt concrete as base layer
  • Full-thickness asphalt pavement structure with steel wire mesh reinforced asphalt concrete as base layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A full-thickness asphalt pavement structure with steel mesh reinforced asphalt concrete as the base layer of the present embodiment, such as figure 1 As shown, the pavement structure from top to bottom is:

[0044] The asphalt concrete surface layer 1 with high rutting resistance is AC-13, and its thickness is 6cm;

[0045] The high modulus asphalt concrete connecting layer 2 is AC-20, and its thickness is 12cm;

[0046] The high modulus asphalt concrete base 3 is ATB-25, and its thickness is 22cm;

[0047] Steel mesh 4, its diameter is 2.0mm, the longitudinal and transverse distances are 4.0cm and 5.0cm respectively, and the elastic modulus is 210Gpa;

[0048] Slurry sealing layer 5, its thickness is 8mm;

[0049] The performance parameters of the pavement material are

[0050]

Embodiment 2

[0059] The finite element models of Examples 1, 2 and the comparative example were established respectively. In Example 2, on the basis of the pavement structure of Example 1, the thickness of the asphalt concrete of the connecting layer and the base layer was reduced, so that the bottom tensile strain of the asphalt layer of the pavement structure was SMX. It is close to the tensile strain SMX at the bottom of the asphalt layer in Comparative Example 1, so the thickness of the asphalt layer that can be reduced after adding steel mesh to the pavement is analyzed, and the final connection layer and base asphalt concrete are reduced by 6 cm and 10 cm, respectively. The parameters of the pavement material in Example 2 are the same as those in Example 1.

[0060] A kind of full-thickness asphalt pavement structure with steel mesh reinforced asphalt concrete as the base layer of the present embodiment, correspondingly, the pavement structure from top to bottom is:

[0061] AC-13 as...

Embodiment 3

[0071] The structure of the asphalt pavement in this embodiment is as follows from top to bottom:

[0072] The surface layer of asphalt concrete with high rutting resistance, its thickness is 3cm;

[0073] High modulus asphalt concrete connecting layer, its thickness is 10cm;

[0074] High modulus asphalt concrete base, its thickness is 15cm;

[0075] Wire mesh layer, its diameter is 1mm, the wire mesh size is 20mm×20mm, it can be rectangular or square, the wire is too thin and easy to roll;

[0076] Slurry seal, its thickness is 6mm;

[0077] The above steel wire mesh is treated by epoxy resin coating, sanding unit and tackifying asphalt spraying unit. In the gap between the rollers, the surface of the steel mesh is covered with epoxy resin during the rotation of the roller, and epoxy resin is continuously added on the roller; using bisphenol A epoxy resin and heat-resistant curing agent, it has High bond strength and certain heat resistance.

[0078] The main structure ...

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Abstract

The invention relates to a full-thickness asphalt pavement structure taking steel wire mesh reinforced asphalt concrete as a base layer, and the pavement structure sequentially comprises a high-rut-resistance asphalt concrete surface layer, a high-rut-resistance asphalt concrete surface layer and a high-rut-resistance asphalt concrete surface layer from top to bottom, the thickness of the high-modulus asphalt concrete bonding layer is 6-15 cm; the thickness of the high-modulus asphalt concrete base layer is 13-22 cm; in the steel wire mesh layer, the diameter of steel wires of a steel wire mesh is 0.8-2.0 mm, and the hole size of the steel wire mesh is between 20 mm * 20 mm and 80 mm * 80 mm; the thickness of the slurry seal layer is 6-10 mm; and the steel wire mesh needs to be subjected to tackifying and roughness increasing treatment. The steel wire mesh is arranged on the slurry seal and located on the lower portion of the pavement structure, the direction of steel wires is consistent with the stress direction of the overlay, the advantage of high tensile strength of steel wire materials can be fully played, fine steel wires are selected, good bond stress can be formed between the asphalt mixture and the steel wires, interlayer defect gaps are reduced, and the strength of the pavement structure is improved.

Description

technical field [0001] The invention relates to the field of asphalt pavement, in particular to a composite thin full-thickness and long-life asphalt pavement containing steel mesh reinforcement layers. Background technique [0002] Road transportation has become the main mode of freight transportation in my country, the electric vehicle industry is booming, and the trend of road transportation with heavy loads and large traffic volumes is gradually obvious, which puts forward higher requirements for the performance indicators of pavement structures. [0003] Full-thickness asphalt pavement means that the asphalt surface layer is directly laid on the treated subgrade soil. This type of pavement basically eliminates the common pavement structural diseases such as reflection cracks (bottom-up), fatigue damage and water damage. , The functional diseases of the pavement appear in the upper part of the pavement. During maintenance, only the surface layer needs to be repaired. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32E01C7/26E01C11/16
CPCE01C7/32E01C7/26E01C11/16Y02A30/60
Inventor 肖庆一吴康威龚芳媛李子祎王文斌
Owner HEBEI UNIV OF TECH
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