Permeable asphalt pavement structure

A technology of pavement structure and permeable asphalt, which is applied in basic structure engineering, roads, roads, etc., can solve the problems of low bearing strength and poor durability, and achieve the effect of improving bearing capacity, good water permeability and good economy.

Active Publication Date: 2021-07-20
SHANGHAI BAOTIAN NOVEL BUILDING MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low bearing strength and poor durability of conventional permeable pavement in the prior art, the present invention provides a permeable asphalt pavement structure

Method used

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  • Permeable asphalt pavement structure
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Effect test

Embodiment 1

[0067] The permeable asphalt pavement structure of this embodiment includes the upper layer of the asphalt mixture, the lower layer of the asphalt mixture, the permeable base layer, the sealing layer, the impermeable subbase layer and the roadbed from top to bottom. The water collecting ditch is filled with steel slag gravel.

[0068] Among them, the upper layer of the asphalt mixture adopts steel slag permeable asphalt mixture PAC-13 with a nominal maximum particle size of 13.2mm. The binder is high-viscosity modified asphalt. The upper layer of the asphalt mixture has a porosity of 19.1% and a thickness of 4 cm.

[0069] The lower layer of asphalt mixture adopts steel slag permeable asphalt mixture PAC-20 with a nominal maximum particle size of 19mm. The amount of steel slag aggregate in the lower layer of asphalt mixture is 80%, and the rest is stone. The lower layer of asphalt mixture has a porosity of 22.6% and a thickness of 7 cm.

[0070] The amount of steel slag agg...

Embodiment 2

[0074] The permeable asphalt pavement structure of this embodiment includes the upper layer of the asphalt mixture, the lower layer of the asphalt mixture, the permeable base layer, the sealing layer, the impermeable subbase layer and the roadbed from top to bottom. The water collecting ditch is filled with steel slag gravel.

[0075] Among them, the upper layer of the asphalt mixture adopts steel slag permeable asphalt mixture PAC-13 with a nominal maximum particle size of 13.2mm. The binder is high-viscosity modified asphalt. The upper layer of the asphalt mixture has a porosity of 19.4% and a thickness of 5 cm.

[0076] The lower layer of asphalt mixture adopts steel slag permeable asphalt mixture PAC-20 with a nominal maximum particle size of 19mm. The amount of steel slag aggregate in the lower layer of asphalt mixture is 80%, and the rest is stone. The lower layer of the asphalt mixture has a porosity of 21.2% and a thickness of 8 cm.

[0077] The amount of steel slag...

Embodiment 3

[0081] The permeable asphalt pavement structure of this embodiment includes the upper layer of the asphalt mixture, the lower layer of the asphalt mixture, the permeable base layer, the sealing layer, the impermeable subbase layer and the roadbed from top to bottom. The water collecting ditch is filled with steel slag gravel.

[0082] Among them, steel slag permeable asphalt mixture PAC-13 with a nominal maximum particle size of 13.2mm is used for the upper layer of asphalt mixture. The content of steel slag aggregate in the upper layer of asphalt mixture is 40%, and the rest is stone and organic binder. The binder is high-viscosity modified asphalt. The upper course of the asphalt mixture has a porosity of 18.4% and a thickness of 5 cm.

[0083] The lower layer of asphalt mixture adopts steel slag permeable asphalt mixture PAC-20 with a nominal maximum particle size of 19mm. The amount of steel slag aggregate in the lower layer of asphalt mixture is 40%, and the rest is ston...

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Abstract

The invention provides a permeable asphalt pavement structure, which comprises an asphalt mixture surface course, a permeable base, a sealing layer, a non-permeable subbase and a roadbed from top to bottom. There is a water guide pipe at the bottom of the gutter, and steel slag gravel is filled in the gutter; the amount of steel slag aggregate in the asphalt mixture surface layer is 30-90%, and the amount of steel slag aggregate in the permeable base course is 50-70%, the amount of steel slag aggregate in the impermeable subbase is 40-90%, and the amount of steel slag in the gutter is 50-80%; Roller steel slag is used in the subbase and the internal drainage system of the pavement to realize the recycling of steel slag, which not only improves the bearing capacity of the permeable asphalt pavement, reduces road surface diseases, improves the durability of the pavement, and effectively reduces the rainwater Phosphorous and nitrogenous pollutants, thus helping to reduce water pollution.

Description

technical field [0001] The invention belongs to the technical field of permeable asphalt pavement, and in particular relates to a permeable asphalt pavement structure for comprehensive utilization of steel slag and solid waste. Background technique [0002] Permeable asphalt pavement can reduce road runoff and urban waterlogging, and also help to improve road traffic safety. The permeable asphalt pavement has large voids, and structural defects such as looseness and potholes often appear under load. Practice has found that conventional permeable asphalt pavement lacks good durability. At the same time, with the increasing awareness of environmental protection, quarrying in many areas has been restricted by policies. In order to improve the mechanical strength of permeable asphalt pavement and increase the bearing capacity and durability of permeable asphalt pavement, it is necessary to find alternative resources and design permeable asphalt pavement with high strength and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/18E01C7/26E01C3/00E01C11/22E01C3/04E02D3/10C04B28/12C04B28/00C04B26/26
CPCC04B26/26C04B28/00C04B28/12E01C3/00E01C3/003E01C3/04E01C7/18E01C7/182E01C7/26E01C11/226E02D3/10C04B18/08C04B18/142C04B14/02
Inventor 王林李嵩赵玉静刘帅林龙杰
Owner SHANGHAI BAOTIAN NOVEL BUILDING MATERIALS
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