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Desulfurized reclaimed rubber recycled asphalt mixture and preparation method thereof

A technology for reclaiming asphalt and mixing materials, applied in the field of road engineering materials, can solve the problems of high viscosity and hardness of harmful gas aging asphalt, endangering the health of construction workers, and difficulty in swelling of rubber powder, so as to ensure physical health and reduce maintenance and construction. Cost, fast swelling effect

Inactive Publication Date: 2021-03-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, rubber powder also has certain defects in the regeneration application of asphalt mixture: (1) rubber powder is difficult to swell when mixed with asphalt, and the rubber powder and asphalt are only physically bonded, and the rubber does not form a network structure. The filler is dispersed in the asphalt, resulting in poor crack resistance of the mixture; (2) The rubber powder has poor compatibility with asphalt, poor high-temperature stability, and harmful gases are likely to be generated during construction, which endangers the health of construction workers
[0006] To sum up, in order to solve the existing problems, it is necessary to improve the raw materials and process of the production and preparation of the mixture, to solve the problem of poor crack resistance caused by the poor combination of rubber powder and asphalt in the rubber asphalt mixture, and the problem of harmful gases generated by the pyrolysis of rubber The viscosity and hardness of the aged asphalt are high and the agglomeration is difficult to disperse, and it is difficult to fully react and integrate with the rubber powder and new asphalt. Increase the amount of rubber powder and improve the road performance of the mixture

Method used

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  • Desulfurized reclaimed rubber recycled asphalt mixture and preparation method thereof
  • Desulfurized reclaimed rubber recycled asphalt mixture and preparation method thereof
  • Desulfurized reclaimed rubber recycled asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The desulfurized reclaimed rubber regenerated asphalt mixture is prepared through the following steps:

[0031] Preheat 35 parts of old asphalt pavement reclaimed material in an oven to 195°C±5°C for 5 hours, preheat 2.925 parts of base asphalt to 150°C±5°C for 5 hours in an oven, and preheat 56.1 parts of new aggregate in an oven. Heat to 195°C±5°C and keep it warm for 5 hours; put the reclaimed old asphalt pavement and base asphalt into the mixer after preheating and heat preservation, mix at 180°C for 90s, and then put the new aggregate heated to 180-200°C Add it into the mixer, mix at 180°C for 90s, keep it at 180°C-200°C in the mixer to desulfurize 0.975 parts of rubber powder and 5 parts of component solubilizer, and mix for 180s to prepare the desulfurized For reclaimed rubber and recycled asphalt mixture, the desulfurized rubber powder + matrix asphalt accounts for 25% of the desulfurized rubber powder, and the oil-stone ratio of the desulfurized rubber powder +...

Embodiment 2

[0039] For the preparation of desulfurized reclaimed rubber-reclaimed asphalt mixture, compared with Example 1, the adjustments are as follows: the amount of base asphalt is 2.7 parts, the amount of desulfurized rubber powder is 0.9 parts, the amount of new aggregate is 56.4 parts, and the amount of desulfurized rubber powder + base asphalt and Xinji The asphalt ratio of the raw material is 6.0%.

Embodiment 3

[0041] For the preparation of desulfurized reclaimed rubber reclaimed asphalt mixture, compared with Example 1, the adjustments made are: the amount of base asphalt is 3.15 parts, the amount of desulfurized rubber powder is 1.05 parts, the amount of new aggregate is 55.8 parts, and the amount of desulfurized rubber powder + base asphalt and Xinji The asphalt ratio of the raw material is 7.0%.

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Abstract

The invention discloses a desulfurized reclaimed rubber recycled asphalt mixture and a preparation method thereof, and belongs to the technical field of road engineering materials. The desulfurized reclaimed rubber recycled asphalt mixture is prepared from the following raw materials in parts by weight: 25-45 parts of an old asphalt pavement reclaimed material, 2-8 parts of matrix asphalt, 0.5-4 part of desulfurized rubber powder, 45-60 parts of a new aggregate and 3-8 parts of a component solubilizer. The preparation method comprises the following steps: heating and mixing the recycled asphalt pavement material of an old road and the matrix asphalt, adding the new aggregate, and finally adding the desulfurized rubber powder and the component solubilizer for modification. According to thedesulfurized reclaimed rubber recycled asphalt mixture, environmental pollution can be reduced, and the road maintenance and reconstruction cost can be reduced; and meanwhile, good anti-cracking performance is achieved, and emission of harmful gas can be reduced.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a desulfurized reclaimed rubber regenerated asphalt mixture and a preparation method thereof. Background technique [0002] Semi-rigid base asphalt pavement is the most typical structural type of high-grade highways and urban roads in my country. With the increase of highway mileage and the expansion of cities in China, the aging of asphalt pavement will lead to the decline of service performance. Repair and maintenance have become the mainstay of road engineering in my country. A big task. A large amount of waste is generated in the process of maintenance and maintenance. Recycling and reuse of waste will reduce environmental pollution, reduce the use of new materials, and achieve the effect of saving resources and reducing costs. [0003] In the existing recovery and reuse technology of asphalt pavement waste, a certain amount of modifiers, regene...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2111/00017C04B18/22C04B24/08C04B14/28
Inventor 陈先华王世奇徐刚许麒朱亚琴
Owner SOUTHEAST UNIV
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