Large grain diameter water permeability asphalt mixture novel pavement structure and laying method thereof

A technology of asphalt mixture and pavement structure, which is applied to the coagulation pavement, roads, roads and other directions of on-site paving, can solve the problem of unavoidable asphalt layer, etc., and achieves the advantages of shortening closed traffic time, improving anti-cracking and reducing equipment investment. Effect

Inactive Publication Date: 2008-08-27
山东省交通厅公路局 +2
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Firstly, temperature cracks, drying shrinkage cracks and reflection cracks caused by semi-rigid base are unavoidable. Secondly, due to the compactness of semi-rigid base, it is impossible to exclude water in the asphalt layer and infiltrated semi-rigid base. The accumulation of water will cause scour on the surface of the base Water damage to slurry, pumping and asphalt mixture

Method used

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  • Large grain diameter water permeability asphalt mixture novel pavement structure and laying method thereof

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Experimental program
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Effect test

Embodiment 1

[0042]In Fig. 1, the base layer 1 is an old asphalt pavement, on which a layer of 10-15 cm large particle size permeable asphalt mixture layer 2 is laid, and then three layers of different particle sizes are laid in turn on it. The asphalt layer 3 has a total thickness of 16-18cm.

[0043] Or the base layer 1 is a highway pavement, on which a layer of 10-15cm large particle diameter permeable asphalt mixture layer 2 is laid, and then three layers of asphalt layers 3 with different particle diameters are successively laid on it, wherein The thickness is 16-18cm.

[0044] Or the base layer 1 is a road surface with large particle size after crushing of old cement concrete, on which a layer of 10-12cm large particle size permeable asphalt mixture layer 2 is laid, and then three layers of particle size phase Different asphalt layer 3, wherein the thickness is 16-18cm.

[0045] Or the base layer 1 is a semi-rigid base layer, on which a layer of 15cm large particle size permeable a...

Embodiment 2

[0047] In Fig. 2, the base layer 1 is an old asphalt pavement. On the basis of this pavement, a layer of 10-15 cm large particle size permeable asphalt mixture layer 2 is laid, and then two layers of different particle sizes are laid in turn on it. The asphalt layer 3 has a total thickness of 10-12cm.

[0048] Or lay a layer of 8-10cm large particle size permeable asphalt mixture layer 2 on the base layer of the road surface, and then lay two layers of asphalt layers 3 with different particle sizes on it, with a total thickness of 8 cm. -10cm.

[0049] Or its base layer 1 is a highway pavement, on which a large particle size permeable asphalt mixture layer 2 of 10-12 cm is laid, and then two layers of asphalt layers 3 with different particle sizes are laid successively on it, wherein The thickness is 10-12cm.

[0050] Or its base layer 1 is an old cement concrete pavement, on which a layer of 8-12 cm large particle size permeable asphalt mixture layer 2 is laid, and then two...

Embodiment 3

[0053] In Fig. 3, the base layer 1 is an old asphalt pavement, on which a layer of 8-10 cm large particle size permeable asphalt mixture layer 2 is laid, and then a layer of different particle sizes is laid in turn on it. The asphalt layer 3 has a total thickness of 4-6cm.

[0054] Or its base 1 is an old cement concrete pavement, on which a large particle size permeable asphalt mixture layer 2 of 8-12 cm is laid, and then a layer of asphalt layer 3 with different particle sizes is laid on it, wherein The thickness is 4-6cm.

[0055] The properties of large particle size permeable asphalt mixture layer 2 are:

[0056] 1 High temperature stability

[0057] LSPM is a single particle size skeleton embedded extrusion mixture, and the proportion of coarse aggregate over 9.5mm is about 70%, forming a complete skeleton embedded extrusion, so it has good high temperature stability. Research shows that a more reasonable design of LSPM is the solution to heavy One of the most economi...

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Abstract

The invention discloses a novel road surface structure with large particle diameter water permeability bitumen mixture and a method for laying thereof, which solves diseases such as problems of reflection crevice, pit groove and pump mud and the like which are brought from that current express-way only adopts a semi-rigid basal layer and a traditional bitumen layer, and has the advantages of simple structure, good water permeability, thereby being not easy to occur breakage of early water and being capable of efficiently increasing life time of the road surface and the like. The novel road surface structure comprises a basal layer which is consecutively provided with a large particle diameter water permeability bitumen mixture layer and at least a bitumen layer, wherein the large particle diameter water permeability bitumen mixture layer is made of one-stone coarse aggregates with the particle diameter of 25mm-62mm to form a frame and be mixed with a proper quantity of filling fine aggregates with the particle diameter of 0-4.75mm and bituminous cement to form the frame type bitumen mixture, and the thickness of each bitumen layer is not above the thickness of the large particle diameter water permeability bitumen mixture layer.

Description

technical field [0001] The invention belongs to the field of transportation engineering, and relates to a new type of pavement structure combination used in new construction, reconstruction, and large and medium repair projects of expressways, national and provincial arterial roads, and municipal roads, especially a large particle size water-permeable A new pavement structure of asphalt mixture and its laying method. Background technique [0002] At present, the total mileage of my country's highways has exceeded 2 million kilometers, of which asphalt pavements account for the majority. Due to economic and technical reasons, semi-rigid base asphalt pavements, mainly lime-stabilized and cement-stabilized, are currently the first choice for asphalt pavements that have been built. main structural form. Due to its high overall strength and good plate quality, the semi-rigid base layer makes the asphalt pavement have a high bearing capacity, and the material is easy to obtain, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18E01C7/22E01C7/32
Inventor 王松根房建果张玉宏王林毕玉峰马世杰张宏庆李武
Owner 山东省交通厅公路局
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