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Ultrahigh-ductility concrete stress absorption layer asphalt pavement

A stress-absorbing layer, asphalt pavement technology, applied in the direction of on-site coagulation pavement, roads, roads, etc., can solve problems such as water seepage and pavement cracking

Inactive Publication Date: 2020-10-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a super-high ductility concrete stress-absorbing layer asphalt pavement to solve the problem of pavement cracking and water seepage caused by reflection cracks in the semi-rigid asphalt pavement

Method used

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  • Ultrahigh-ductility concrete stress absorption layer asphalt pavement
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  • Ultrahigh-ductility concrete stress absorption layer asphalt pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An ultra-high ductility concrete stress absorbing layer asphalt pavement, such as figure 1 , including a cushion layer 1, a base layer 2, a base layer 3, a stress absorbing layer 4, and a surface layer 5 laid sequentially from bottom to top; the cushion layer 1 is a granular material that is not easy to frost heave; the base layer 2 is lime-powder Coal ash stabilized crushed stone; the base layer 3 is cement stabilized crushed stone; the stress absorbing layer 4 is ultra-high ductility concrete; the surface layer 5 is dense asphalt concrete.

[0029] Among them, the thickness of the cushion layer 1 is 20cm, and the aggregates that are not easy to frost heaving are gravel soil with a fine material content of 6%. The cushion layer 1 should be spread to the same width as the roadbed to facilitate drainage of the road surface structure and maintain the stability of the roadbed.

[0030] The thickness of the base course 2 is 20 cm, the lime-fly ash stabilized crushed stone ...

Embodiment 2

[0036] An ultra-high ductility concrete stress absorbing layer asphalt pavement, such as figure 1 , including a cushion layer 1, a base layer 2, a base layer 3, a stress absorbing layer 4, and a surface layer 5 laid sequentially from bottom to top; the cushion layer 1 is a granular material that is not easy to frost heave; the base layer 2 is lime-powder Coal ash stabilized crushed stone; the base layer 3 is cement stabilized crushed stone; the stress absorbing layer 4 is ultra-high ductility concrete; the surface layer 5 is dense asphalt concrete.

[0037] Among them, the thickness of the cushion layer 1 is 20cm, and the aggregates that are not easy to frost heaving are gravel soil with a fine material content of 6%. The cushion layer 1 should be spread to the same width as the roadbed to facilitate drainage of the road surface structure and maintain the stability of the roadbed.

[0038] The thickness of the base course 2 is 20 cm, the lime-fly ash stabilized crushed stone ...

Embodiment 3

[0044] An ultra-high ductility concrete stress absorbing layer asphalt pavement, such as figure 1, including a cushion layer 1, a base layer 2, a base layer 3, a stress absorbing layer 4, and a surface layer 5 laid sequentially from bottom to top; the cushion layer 1 is a granular material that is not easy to frost heave; the base layer 2 is lime-powder Coal ash stabilized crushed stone; the base layer 3 is cement stabilized crushed stone; the stress absorbing layer 4 is ultra-high ductility concrete; the surface layer 5 is dense asphalt concrete.

[0045] Among them, the thickness of the cushion layer 1 is 20cm, and the aggregates that are not easy to frost heaving are gravel soil with a fine material content of 6%. The cushion layer 1 should be spread to the same width as the roadbed to facilitate drainage of the road surface structure and maintain the stability of the roadbed.

[0046] The thickness of the base course 2 is 20 cm, the lime-fly ash stabilized crushed stone u...

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Abstract

The invention relates to an ultrahigh-ductility concrete stress absorption layer asphalt pavement. The asphalt pavement comprises a cushion layer, a subbase layer, a base layer, a stress absorption layer and a surface layer which are sequentially laid from bottom to top. The cushion layer is made of granules which are not easy to frost heave; the subbase layer is lime-fly ash stabilized macadam; the base layer is cement stabilized macadam; the stress absorption layer is made of ultra-high ductility concrete; and the surface layer is made of densely-mixed asphalt concrete. Compared with the prior art, by utilizing high toughness and high energy consumption capacity of the ultrahigh-ductility concrete, the ultrahigh-ductility concrete is arranged between the base layer and the surface layerof the asphalt pavement as a stress absorption layer, so that generation and development of reflection cracks can be effectively controlled, the fatigue resistance of the pavement is improved, water damage is reduced, the mechanical property of the pavement is improved, the service life of the pavement is prolonged, and the maintenance frequency of the pavement is reduced.

Description

technical field [0001] The invention relates to the field of traffic and transportation engineering, in particular to an asphalt pavement of an ultra-high ductility concrete stress absorption layer. Background technique [0002] In order to adapt to economic development and demand, high-grade highways began to use a large number of semi-rigid base asphalt pavement structures. Compared with the traditional mud-bound macadam and graded gravel base asphalt pavement, the semi-rigid base asphalt pavement using inorganic binders has the advantages of better water stability, higher strength and bearing capacity, and greater stiffness. With the widespread use of semi-rigid base asphalt pavements, the problem of cracks in such pavements has become more and more serious. [0003] According to relevant research, the causes of cracks in semi-rigid asphalt pavement can be roughly divided into three types: fatigue cracks, temperature cracks and reflection cracks. Among them, the proporti...

Claims

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Application Information

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IPC IPC(8): E01C7/32
CPCE01C7/32
Inventor 余江滔
Owner TONGJI UNIV
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