Self-supplementing type salt storage and ice and snow melting asphalt concrete pavement structure based on concentration gradient

A technology of asphalt concrete and concentration gradient, which is applied to coagulating pavement, roads, roads and other directions paved on site, which can solve the problems of short time for road surface melting ice and snow, slow-release salt storage filler interlocking, filler waste, etc., to achieve Improve the service life, increase the effective life, and improve the effect of utilization

Pending Publication Date: 2022-07-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. It is difficult for the slow-release salt-storage filler in the lower layer to migrate to the upper layer, which may easily lead to interlocking and loss of the slow-release salt-storage filler in the middle and lower layers, resulting in waste of filler
[0006] 2. The slow-release salt-storage filler material in the upper layer is difficult to be replenished in time after precipitation, which will cause the road surface to melt ice and snow for a short time, and it is difficult to truly achieve the effect of long-term self-melting ice and snow on the road

Method used

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  • Self-supplementing type salt storage and ice and snow melting asphalt concrete pavement structure based on concentration gradient
  • Self-supplementing type salt storage and ice and snow melting asphalt concrete pavement structure based on concentration gradient
  • Self-supplementing type salt storage and ice and snow melting asphalt concrete pavement structure based on concentration gradient

Examples

Experimental program
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Effect test

preparation example Construction

[0047] Wherein, the preparation method of the asphalt mixture containing the mass fraction of 9% high-purity slow-release salt storage ice-melting ice-snow filler, includes the following steps:

[0048] Step 1. Heating: Heat the high-purity slow-release salt-storage melting ice and snow filler in an oven with a temperature of 170°C.

[0049] Step 2. Blending: Add the heated high-purity slow-release storage salt melting ice and snow filler to the asphalt mixture mixing furnace at a mixing ratio of 9% by mass, and mix with the asphalt mixture evenly, such as stirring for 75s, etc.

[0050] Step 3. Pressing: Press the asphalt mixture mixed with the high-purity slow-release salt-storing, ice-melting and snow-melting filler to form a rutting plate test piece.

[0051] 3. Lay the middle surface layer, and lay the asphalt mixture containing 7% high-purity slow-release salt storage ice-melting ice and snow filler on the lower layer and compact it.

[0052] The preparation method of a...

Embodiment 2

[0055] Example 2 of the present application (referred to as experimental group 2)

[0056] 1. Lay the roadbed and compact it.

[0057] 2. Lay the lower layer, and lay the SMA asphalt mixture containing 10% high-purity slow-release salt storage ice-melting ice and snow filler on the roadbed and compact it.

[0058] Wherein, the preparation method of the SMA asphalt mixture containing the mass fraction of 10% high-purity slow-release salt storage ice-melting ice and snow filler, includes the following steps:

[0059] Step 1. Heating: Heat the high-purity slow-release salt-storage melting ice and snow filler in an oven with a temperature of 170°C.

[0060] Step 2. Blending: Add the heated high-purity slow-release salt storage and melting ice and snow filler to the SMA asphalt mixture mixing furnace according to the mixing ratio of 10% by mass, and stir the asphalt mixture evenly, such as stirring for 75s, etc. .

[0061] Step 3. Pressing: Press the SMA asphalt mixture mixed wi...

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Abstract

The invention discloses a concentration gradient-based self-supplementing salt storage and ice and snow melting asphalt concrete pavement structure, which is provided with two or more layers of asphalt concrete surface layers with gradient doping proportions of slow-release salt storage and ice and snow melting fillers, wherein the doping proportions of the slow-release salt storage and ice and snow melting fillers are gradually increased from top to bottom by taking a layer as a unit; therefore, a one-way concentration gradient channel from the lower surface layer to the surface layer of the pavement is formed after rainwater permeates into the asphalt concrete pavement in ice and snow weather, so that slow-release salt storage components of the middle and lower surface layers are timely migrated to the surface layer of the pavement under the action of the concentration gradient, and the effect of melting ice and snow on the surface layer of the pavement is achieved. Compared with the traditional method of directly adding the slow-release salt-storage ice and snow-melting filler into the pavement structure, the structure disclosed by the invention can quickly and effectively supplement the loss of the salt on the surface layer of the pavement, improve the utilization efficiency of the raw material of the slow-release salt-storage filler, timely melt the ice and snow on the surface layer of the pavement and maintain the traffic safety of the road in winter.

Description

technical field [0001] The invention relates to an asphalt concrete pavement, in particular to a concentration gradient-based self-replenishing salt-storing-ice-snow-melting asphalt concrete pavement structure. Background technique [0002] The problem of road snow and icing is one of the main reasons for the hidden danger of road traffic safety in winter. The survey found that about 30% of winter road traffic accidents are caused by road snow and icing. Therefore, in order to reduce the traffic accidents caused by snow and icing on the roads in winter, it is necessary to take various measures to remove the snow and ice on the roads. At present, there are two main types of road ice and snow removal methods at home and abroad: passive and active. Passive snow removal method refers to the method of removing snow and ice from the road surface by relying on the external action on the road surface, which can be divided into three categories: physical, chemical and mechanical. T...

Claims

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Application Information

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IPC IPC(8): E01C7/18E01C11/24
CPCE01C7/18E01C7/182E01C11/245Y02A30/60
Inventor 王声乐田如鹏
Owner SOUTHEAST UNIV
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