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Waste pavement asphalt recovery method and device

The technology of a recycling device and a recycling method is applied in the field of waste road asphalt recycling, which can solve the problems of reducing the quality of asphalt concrete and affecting the quality of asphalt concrete, and achieve the effects of improving the recycling efficiency, increasing the milling depth, and improving the softening depth.

Inactive Publication Date: 2020-08-14
段真巍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the waste after milling can be blended into new materials in a limited proportion to produce asphalt concrete. In the prior art, cold milling is used, and the aggregates in the waste are severely crushed, and the direct blending has a great impact on the gradation, and Due to the serious aging of the asphalt in the waste, it will also affect the quality of asphalt concrete. Even if the mixing ratio is controlled, it is difficult to avoid the reduction of the quality of asphalt concrete

Method used

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  • Waste pavement asphalt recovery method and device
  • Waste pavement asphalt recovery method and device
  • Waste pavement asphalt recovery method and device

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Embodiment 1

[0023] The waste pavement asphalt recycling method of the present embodiment may further comprise the steps:

[0024] 1) Preheat the asphalt pavement to be recycled, the preheating temperature is not lower than 60 degrees Celsius; the preheating temperature is slightly higher than the softening point of general road asphalt, firstly, it can make the surface initially soften, and secondly, it is conducive to the subsequent injection of hot tar penetration effect.

[0025] 2) Pour hot tar into the preheated asphalt pavement. The temperature of the hot tar is not lower than 100 degrees Celsius. After pouring, the residual hot tar on the asphalt pavement is sucked and recovered to obtain recovered tar; the hot tar penetrates into the deep layer of the asphalt pavement and can be used Its own heat and solubility to asphalt soften the pavement layer at a certain depth, which is beneficial for subsequent milling.

[0026] 3) Milling the asphalt pavement filled with hot tar, reclaimi...

Embodiment 2

[0029] Such as Figure 1-4 , a waste pavement asphalt recovery device, used to realize the recovery method of embodiment 1, its structure includes a vehicle 1, the vehicle 1 is provided with a temperature control system 2, a tar storage tank 3, a grinding cylinder 4, the temperature control system is set There are hot air output end and cold air output end; the bottom of the vehicle is provided with hot air port 5, tar filling port 6, tar suction port 7, milling cylinder 8, and mixture recovery port 9 from front to back; hot air port and temperature control system The hot air output end is connected, the tar filling port and the tar suction port are connected to the tar storage tank through the tar circulation pipeline, and the tar storage tank is equipped with a heater; the mixture recovery port is connected to the grinding cylinder inlet through the mixture conveying channel, and the mixture is conveyed Passage adopts bucket to carry 10, connects the entrance of milling cham...

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Abstract

The invention relates to a waste pavement asphalt recovery method and device. The recovery method comprises the following steps: 1) preheating a to-be-recovered asphalt pavement; 2) pouring hot tar into the preheated asphalt pavement, and sucking and recovering residual hot tar on the asphalt pavement after pouring to obtain recovered tar; 3) milling the asphalt pavement filled with the hot tar, recovering a generated milling material to obtain a recovered mixture, grinding and separating the recovered mixture to obtain a recovered material and recovered asphalt, and making a grinding temperature not be higher than 0 DEG C; and 4) melting the recovered asphalt, separating precipitates, and mixing and tempering the precipitates and recovered tar to obtain recycled asphalt. According to thescheme, the waste pavement asphalt can be effectively rrecovered and separated, the recycled asphalt and aggregate are obtained, quality of the recycled material is good, and influence on the qualityis small when the recovered material is used for preparing asphalt concrete.

Description

technical field [0001] The invention relates to a method and a device for recovering waste road asphalt, belonging to the technical field of road asphalt regeneration. Background technique [0002] Asphalt pavement is a very widely used pavement structure, which is used in urban roads, highways, and high-grade roads. Asphalt concrete is obtained by heating and mixing crushed stone aggregates, mineral powder and road asphalt materials with a certain gradation, and then paving and rolling. After long-term use, due to the effects of oxidation, sunlight, rain, and loads, it will gradually be damaged. After reaching a certain level, the damaged waste road surface needs to be milled and re-paved. On the one hand, milling and planing of waste pavement will produce a large amount of waste pavement asphalt material; on the other hand, pavement re-laying also needs to use a large amount of aggregate and asphalt material to re-produce asphalt concrete. At present, the waste after mil...

Claims

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Application Information

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IPC IPC(8): E01C23/088E01C23/14E01C19/10
CPCE01C19/1004E01C23/088E01C23/14E01C23/065
Inventor 段真巍张丽丽王爱平
Owner 段真巍