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Recycled asphalt mixture and preparation method thereof

A technology for asphalt mixture and regenerated asphalt, applied in the field of asphalt mixture, can solve the problems affecting the performance of asphalt mixture, secondary aging of asphalt, etc., to improve compressive strength and fatigue resistance, restore road performance, and achieve good resistance The effect of compressive strength and fatigue resistance

Inactive Publication Date: 2021-05-25
杨玉杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the plant-mix heat regeneration method is the most common, but this method requires secondary heating, which leads to secondary aging of asphalt and seriously affects the performance of asphalt mixture

Method used

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  • Recycled asphalt mixture and preparation method thereof
  • Recycled asphalt mixture and preparation method thereof
  • Recycled asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The waste asphalt mixture is prepared by the following method: take the waste material produced during the repair process of the road asphalt layer of the expressway, add it to the crusher for crushing, and sieve to obtain the waste material with a particle size of less than 5mm, 5-15mm waste material, 15 -25mm waste material; mix 0-5mm waste material, 5-15mm waste material and 15-25mm waste material according to the mass ratio of 3:6:2 to get the product.

[0036]The new aggregate is basalt from Hubei Basalt Rock Material Co., Ltd., with a particle size of 5-15mm.

Embodiment 1

[0038] A preparation method for recycled asphalt mixture, comprising the following steps:

[0039] S1. Take 5 parts by weight of asphalt, 0.6 parts by weight of asphalt regenerant, 18 parts by weight of waste asphalt mixture and 57 parts by weight of new aggregate, and set aside;

[0040] S2. Put the waste asphalt mixture and the new aggregate into an oven for heat preservation at 150°C for 3 hours;

[0041] S3. Add asphalt and asphalt rejuvenator to the mixing tank, stir at 140°C for 10 minutes, and the stirring rate is 200 rpm; then add the waste asphalt mixture treated with heat preservation in S2 and new aggregate and continue stirring for 5 minutes to obtain a recycled asphalt mixture.

[0042] The asphalt regenerant is prepared by the following method:

[0043] (1) Take each raw material by weight: 10 parts of rapeseed oil, 60 parts of palm oil, 10 parts of asphalt, 18 parts of plasticizer, 5 parts of surfactant, 2 parts of antioxidant;

[0044] (2) Mix rapeseed oil an...

Embodiment 2

[0050] A preparation method for recycled asphalt mixture, comprising the following steps:

[0051] S1. Take 5 parts by weight of asphalt, 0.6 parts by weight of asphalt regenerant, 18 parts by weight of waste asphalt mixture and 57 parts by weight of new aggregate, and set aside;

[0052] S2. Put the waste asphalt mixture and the new aggregate into an oven for heat preservation at 150°C for 3 hours;

[0053] S3. Add asphalt and asphalt rejuvenator to the mixing tank, stir at 140°C for 10 minutes, and the stirring rate is 200 rpm; then add the waste asphalt mixture treated with heat preservation in S2 and new aggregate and continue stirring for 5 minutes to obtain a recycled asphalt mixture.

[0054] The asphalt regenerant is prepared by the following method:

[0055] (1) Take each raw material by weight: 10 parts of modified rapeseed oil, 60 parts of palm oil, 10 parts of asphalt, 18 parts of plasticizer, 5 parts of surfactant, 2 parts of antioxidant;

[0056] (2) Heat modif...

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Abstract

The invention discloses a preparation method of a recycled asphalt mixture. The preparation method comprises the following steps: S1, weighing asphalt, an asphalt recycling agent, a waste asphalt mixture and a new aggregate for later use; S2, carrying out heat preservation treatment on the waste asphalt mixture and the new aggregate; S3, adding the asphalt and the asphalt regenerant into the stirring kettle for stirring; and S4, adding the waste asphalt mixture having been subjected to heat preservation treatment in the step S2, and continuously stirring the waste asphalt mixture and the new aggregate to obtain the regenerated asphalt mixture. The recycled asphalt mixture disclosed by the invention has good compressive strength and fatigue resistance.

Description

technical field [0001] The invention belongs to the technical field of asphalt mixture, and in particular relates to a recycled asphalt mixture and a preparation method thereof. Background technique [0002] During the use of asphalt pavement, the surface layer will gradually become thinner, aging, and diseased, which restricts road traffic, so regular maintenance is required. However, the maintenance of asphalt pavement produces a large amount of waste asphalt mixture. If it is discarded directly, it will cause waste of resources. Recycling waste asphalt mixture is an effective solution. At present, asphalt pavement mainly includes recycling methods such as in-situ cold recycling, in-situ hot recycling, factory-mixed cold recycling, and factory-mixed hot recycling. Among them, the plant-mix heat regeneration method is the most common, but this method requires secondary heating, which leads to secondary aging of asphalt and seriously affects the performance of asphalt mixtu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/50C04B18/16C04B24/08C04B24/045C04B24/42C04B24/06
Inventor 杨玉杰
Owner 杨玉杰
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