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Drainage asphalt pavement pre-maintenance material and construction process thereof

A technology of drainage asphalt and construction technology, which is applied in the field of drainage asphalt pavement pre-maintenance materials and its construction technology, can solve the problems such as void blockage of drainage asphalt pavement, unsolved anti-scattering performance, loss of water seepage function, etc. , to achieve the effect of prolonging the life of the pavement, delaying the scattering of structural diseases, and improving the coefficient of friction of the pavement.

Inactive Publication Date: 2020-04-17
SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pre-maintenance of ordinary asphalt pavement has been maturely used in China for a long time. Due to the characteristics of large voids in drainage asphalt pavement, the pre-maintenance technology of conventional asphalt pavement will cause serious blockage of the voids of drainage asphalt pavement, causing serious loss of water seepage function
Therefore, in the prior art, in order to solve this problem, the method of ultra-thin spraying, brushing or roller brushing is adopted, and the pre-curing material composed of adhesive and retarder is used to pre-cure the drainage asphalt pavement, which can to a certain extent Improve its anti-scattering ability and prolong the service life of the road surface; however, the technology has not been well resolved in terms of road surface friction coefficient and ultra-thin construction technology so that it can only improve the anti-scattering performance of the road surface in a short period of time

Method used

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  • Drainage asphalt pavement pre-maintenance material and construction process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] S01. Heating a certain amount of high-viscosity and high-elasticity modified asphalt with a dynamic viscosity of 220,000 Pa·s at 60°C to 170°C;

[0029] S02. According to viscosity reducer organic warm mix agent: modified asphalt is 3:100; diluent turpentine: modified asphalt is 20:100 by weight ratio, according to the above sequence, slowly add each component, and use mechanical stirring equipment to continuously Stir until uniform, and measure the temperature of the modified asphalt at 128°C after the stirring is completed, so that the diluted high-viscosity and high-elasticity modified asphalt is first obtained;

[0030] S03. Add the modified asphalt that has been stirred above into the automatic spraying vehicle, and turn on the vehicle insulation device, keep the temperature of the diluted modified asphalt at about 125°C, weigh hydrogen peroxide, and its concentration is 0.4%. According to the hydrogen peroxide solution: The diluted modified asphalt has a weight ra...

Embodiment 2

[0033] S01. Heating a certain amount of high-viscosity and high-elasticity modified asphalt with a dynamic viscosity of 250,000 Pa·s at 60°C to 175°C;

[0034] S02, according to viscosity reducer organic warm mixing agent: modified asphalt is 4:100; diluent turpentine: modified asphalt is 23:100 weight ratio, according to the above sequence, slowly add each component, and use mechanical stirring equipment to continuously Stir until uniform. After the stirring is completed, the temperature of the modified asphalt is measured to be 123°C, and the diluted high-viscosity and high-elasticity modified asphalt is obtained;

[0035] S03. Add the modified asphalt that has been stirred above into the automatic spraying vehicle, and turn on the vehicle insulation device, keep the temperature of the diluted modified asphalt at about 125°C, weigh hydrogen peroxide, and its concentration is 0.4%, according to the hydrogen peroxide solution : The diluted modified asphalt is in a weight ratio...

Embodiment 3

[0038] S01. Heating a certain amount of high-viscosity and high-elasticity modified asphalt with a dynamic viscosity of 270,000 Pa·s at 60°C to 180°C;

[0039] S02, according to viscosity reducer organic warm mixing agent: modified asphalt is 5:100; diluent turpentine: modified asphalt is 25:100 weight ratio, according to the above sequence, slowly add each component, and use mechanical stirring equipment to continuously Stir until uniform. After the stirring is completed, the temperature of the modified asphalt is measured to be 119°C, and the diluted high-viscosity and high-elasticity modified asphalt is obtained;

[0040] S03. Add the above-mentioned modified asphalt that has been stirred into the automatic spraying vehicle, and turn on the vehicle insulation device, keep the temperature of the diluted modified asphalt at about 125°C, weigh hydrogen peroxide, and its concentration is 0.5%. : The diluted modified asphalt is in a weight ratio of 12:100, slowly add hydrogen pe...

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Abstract

The invention provides a drainage asphalt pavement pre-maintenance material and a construction process thereof. The drainage asphalt pavement pre-maintenance material comprises high-viscosity and high-elasticity modified asphalt, a viscosity reducer, a diluent and a foaming agent. The construction process comprises the following steps: heating the high-viscosity high-elasticity modified asphalt toa certain temperature, sequentially adding the viscosity reducer and the diluent, and uniformly stirring the same; using an asphalt automatic spraying vehicle to implement operation on the drainage asphalt pavement, adding the foaming agent into the mixed modified asphalt before spraying, after uniform stirring, conducting spraying operation according to a certain spraying amount, and after curing is conducted for a period of time, completing the construction. The high-viscosity high-elasticity asphalt is used as a main component of a pre-maintenance material, and after pre-maintenance operation, exposed stones on the surface of an old pavement are good in wrapping effect, the interface bonding effect of new asphalt and old asphalt is good, the pavement water seepage capacity loss is small, the pavement friction coefficient is remarkably improved, the engineering service life is expected, the construction process is fast, and the generalizability is high.

Description

technical field [0001] The invention relates to the technical field of materials used in road engineering, in particular to a drainage asphalt pavement pre-maintenance material and a construction process thereof. Background technique [0002] With the continuous deepening of the national sponge city construction, the drainage asphalt pavement technology is the core technology of the sponge city road technology. Based on its large gap characteristics, it has the advantages of no water accumulation on the road surface in rainy days, safety, low noise, and mitigation of urban heat island effect. It has been widely promoted and applied more and more. The porosity of drainage asphalt pavement is as high as 18-22%. With the increase of service life, various diseases will inevitably appear, especially due to the characteristics of large voids and open gradation, flying is the most common structural disease of drainage asphalt pavement This kind of disease has a serious impact on r...

Claims

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Application Information

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IPC IPC(8): E01C19/17E01C23/03
CPCE01C19/176E01C23/03
Inventor 王腾飞闫国杰夏庆宇袁月陆文亮徐韵淳周富强周维维李交
Owner SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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