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Preparation method of low-temperature recycled asphalt and mixture

An asphalt mixture and low-temperature regeneration technology, which is applied in the field of recycled asphalt, can solve the problems that the remaining value of asphalt pavement materials is not fully utilized, affects the technical performance of asphalt, and the aging of asphalt components. It is easy to purchase, easy to control quality, and pavement The effect of increased crack resistance

Pending Publication Date: 2022-08-05
遂宁天孜路新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional asphalt pavement maintenance adopts the method of excavating the surface layer and base layer and then re-paving. Not only the cost of reconstruction is high and the construction period is long, but also the remaining value of the milled asphalt pavement materials cannot be fully utilized.
The existing technology cannot recycle the asphalt in the recycled asphalt pavement material (ie waste asphalt mixture) at room temperature, and the utilization of the asphalt in the recycled asphalt pavement material can only use the "hot melt" method
However, during the high-temperature heating process, a large amount of fuel is consumed, and the asphalt components in the mixture are further aged, which affects the technical performance of asphalt

Method used

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  • Preparation method of low-temperature recycled asphalt and mixture
  • Preparation method of low-temperature recycled asphalt and mixture
  • Preparation method of low-temperature recycled asphalt and mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A low-temperature recycled asphalt mixture of this embodiment is composed of the following raw materials by mass percentage: including 25% of modified stone, 68% of recycled asphalt mixture, 4.5% of new asphalt, 2% of mineral powder, and 0.5% of asphalt regenerant .

[0031] like figure 1 As shown, the preparation method of a kind of low-temperature regenerated asphalt mixture of this embodiment is:

[0032] S1: Preparation of asphalt rejuvenating agent;

[0033] S2: Mix the new asphalt and asphalt rejuvenating agent evenly according to the proportion and reserve;

[0034] S3: Put the recycled asphalt mixture into a drying drum according to the gradation design to dry and heat it to 120-150°C; put the modified stone into another drying drum according to the gradation ratio, dry and heat it to 135-175°C;

[0035] S4: Mix the modified stone and recycled asphalt mixture in proportion and dry mix for 30-60s, put in the mixture of new asphalt and asphalt regenerant accord...

Embodiment 2

[0046] The difference between this example and Example 1 is that the content of each component of the low-temperature regenerated asphalt mixture and the asphalt regenerant is different, specifically:

[0047] A low-temperature regenerated asphalt mixture of this embodiment is composed of the following raw materials by mass percentage: including 20% ​​of modified stone, 75% of recycled asphalt mixture, 2% of new asphalt, 2% of mineral powder, and 1% of asphalt regenerant .

[0048] The asphalt rejuvenating agent involved in this embodiment is composed of the following raw materials by mass percentage:

[0049] It is composed of the following raw materials by mass percentage: 15% of solution-polymerized styrene-butadiene rubber, 50% of 90# petroleum asphalt, 31% of aromatic oil, 0.5% of crosslinking agent, 0.5% of plasticizer, 1.5% of dispersant, and 1.5% of stabilizer. .

Embodiment 3

[0051] The difference between this example and Examples 1 and 2 is the difference in the content of each component of the low-temperature regenerated asphalt mixture and the asphalt regenerant, specifically:

[0052] A low-temperature recycled asphalt mixture of this embodiment is composed of the following raw materials by mass percentage: including 35% modified stone, 55% recycled asphalt mixture, 6% new asphalt, 3% mineral powder, and 1% asphalt regenerant .

[0053] The asphalt rejuvenating agent involved in this embodiment is composed of the following raw materials by mass percentage:

[0054] It is composed of the following raw materials by mass percentage: 25% of solution-polymerized styrene-butadiene rubber, 35% of 90# petroleum asphalt, 35% of aromatic oil, 0.5% of crosslinking agent, 1.5% of plasticizer, 1% of dispersant, 2% of stabilizer .

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Abstract

The invention belongs to the technical field of recycled asphalt, and particularly relates to a low-temperature recycled asphalt and a preparation method of a mixture, the low-temperature recycled asphalt is prepared from the following raw materials in percentage by mass: 20-35% of modified stone, 60-80% of recycled asphalt mixture, 4-10% of new asphalt, 1-4% of mineral powder and 0.5-1% of asphalt regenerant; the asphalt regenerant is prepared from the following raw materials in percentage by mass: 10 to 25 percent of solution polymerized styrene-butadiene rubber, 20 to 60 percent of 90 # petroleum asphalt, 30 to 70 percent of aromatic oil, 0.05 to 0.5 percent of cross-linking agent, 0.05 to 2 percent of plasticizer, 0.05 to 1.5 percent of dispersing agent and 0.05 to 3 percent of stabilizer. The invention aims to enable the asphalt regenerant to be completely soluble with the aged asphalt, improve the low-temperature ductility of the asphalt, enhance the anti-freezing and anti-cracking capabilities of pavements in extremely cold regions and prolong the service life of the pavements.

Description

technical field [0001] The invention belongs to the technical field of regenerated asphalt, and in particular relates to a preparation method of a low-temperature regenerated asphalt and a mixture. Background technique [0002] With the rapid development of highway construction in my country, the total mileage of asphalt roads has increased year by year. At the same time, many asphalt roads built in the early stage have entered the maintenance stage one after another. The speed of construction and maintenance of asphalt roads has been basically the same. The traditional asphalt pavement maintenance adopts the method of excavating the surface layer and the base layer and then re-paving, which not only has high reconstruction cost and long construction period, but also the residual value of the milled asphalt pavement material cannot be fully utilized. The prior art cannot recycle the asphalt in the recycled asphalt pavement material (ie waste asphalt mixture) at normal tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B18/16C04B24/36
CPCC04B26/26C04B18/16C04B40/0039C04B2111/0075C04B14/00C04B18/12C04B24/2676C04B24/00C04B24/2641C04B14/28C04B24/36Y02W30/91
Inventor 李红冯常海胡彬
Owner 遂宁天孜路新材料技术有限公司
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