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A warm-mix recycled asphalt mixture and its preparation method

A technology of old asphalt mixture and recycled asphalt, which is applied in the field of warm-mix recycled asphalt mixture and its preparation, can solve the problems of complex preparation method of warm-mix recycled asphalt mixture, reduce the mixing temperature of recycled asphalt, and achieve no pollution in the preparation process, Effects of emission reduction and utilization improvement

Inactive Publication Date: 2017-07-25
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The warm-mix recycled asphalt mixture of this invention makes full use of the old asphalt and stone materials, and reduces the mixing temperature of the recycled asphalt, but the regeneration agent and the warm-mix agent are added in sequence as two additives, so that the preparation method of the warm-mix recycled asphalt mixture complex

Method used

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  • A warm-mix recycled asphalt mixture and its preparation method
  • A warm-mix recycled asphalt mixture and its preparation method
  • A warm-mix recycled asphalt mixture and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0056] A warm-mix recycled asphalt mixture is prepared by mixing warm-mix recycled asphalt, new mineral material and old asphalt mixture, and the warm-mix recycled asphalt is prepared by mixing asphalt and a composite warm-mix regeneration agent. The asphalt is new asphalt.

[0057] Prepare 2×10 5 g Warm mix recycled asphalt mixture. The dosage of old asphalt mixture is 30%, which is 6×10 4 g, where aged asphalt accounts for 5.0%, that is, the quality of aged asphalt P 2 = 3000g. The amount of asphalt binder in the warm-mix recycled asphalt mixture is determined to be 4.8% by asphalt mixture design, that is, the mass of asphalt binder is 9600g. Asphalt binder includes new asphalt and aged asphalt, the quality of new asphalt P 1 =9600-3000=6600g.

[0058] Composite warm-mix regeneration agent includes surfactant and oil regeneration agent. The surfactant is fatty acid glyceride, which is a yellow, transparent, liquid substance at room temperature; the oil regeneration ag...

Embodiment 2

[0070] A warm-mix recycled asphalt mixture is prepared by mixing warm-mix recycled asphalt, new mineral material and old asphalt mixture, and the warm-mix recycled asphalt is prepared by mixing asphalt and a composite warm-mix regeneration agent. The asphalt is new asphalt.

[0071] Prepare 2×10 5 g Warm mix recycled asphalt mixture. The dosage of the old asphalt mixture is 10%, that is, 2×10 4 g, where aged asphalt accounts for 5.3%, that is, the quality of aged asphalt P 2 = 1060 g. The amount of asphalt binder in the warm-mix recycled asphalt mixture is determined to be 4.7% by asphalt mixture design, that is, the mass of asphalt binder is 9400g. Asphalt binder includes new asphalt and aged asphalt, the quality of new asphalt P 1 =9400-1060=8340g.

[0072] Composite warm-mix regeneration agent includes surfactant and oil regeneration agent. The surfactant is sorbitan fatty acid, which is a yellow, transparent, liquid substance at normal temperature; the oil regenerat...

Embodiment 3

[0084] A warm-mix recycled asphalt mixture is prepared by mixing warm-mix recycled asphalt, new mineral material and old asphalt mixture, and the warm-mix recycled asphalt is prepared by mixing asphalt and a composite warm-mix regeneration agent. The asphalt is new asphalt.

[0085] Prepare 2×10 5 g Warm mix recycled asphalt mixture. The dosage of the old asphalt mixture is 50%, that is, 1×10 5 g, where aged asphalt accounts for 4.7%, that is, the quality of aged asphalt P 2= 4700 g. The amount of asphalt binder in the warm-mix recycled asphalt mixture is determined to be 5.0% by asphalt mixture design, that is, the mass of asphalt binder is 10000g. Asphalt binder includes new asphalt and aged asphalt, the quality of new asphalt P 1 =10000-4700=5300g.

[0086] Composite warm-mix regeneration agent includes surfactant and oil regeneration agent. The surfactant is polysorbate, which is a yellow, transparent, and liquid substance at room temperature; the oil regeneration a...

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Abstract

The invention discloses a regenerated warm mix asphalt mixture which is formed by mixing regenerated warm mix asphalt, new mineral aggregates and an old asphalt mixture, wherein the regenerated warm mix asphalt is formed by mixing asphalt with a compound warm-mixing regenerant. The compound warm-mixing regenerant is a composite material of a surfactant and oil regenerant. The invention further discloses a preparation method for the regenerated warm mix asphalt mixture. The preparation method comprises the step of uniformly mixing the regenerated warm mix asphalt with the old asphalt mixture. According to the invention, the compound warm-mixing regenerant is added into the asphalt to prepare the regenerated warm mix asphalt, and the regenerated warm mix asphalt is added into a mixture of the new mineral aggregates and the old asphalt mixture to form the regenerated warm mix asphalt mixture. The preparation method for the regenerated warm mix asphalt mixture is simple, lower in mixing temperature, and capable of reducing emission of a harmful gas, lowering the environmental pollution and enabling the mixing amount of the old asphalt mixture to reach 50%. And meanwhile, the prepared regenerated warm mix asphalt mixture has very good pavement performance.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a warm-mixed recycled asphalt mixture and a preparation method thereof. Background technique [0002] In recent years, the warm mixing technology and recycling technology of asphalt and asphalt mixture, as a new technology for asphalt pavement construction, has been paid more and more attention by people. [0003] The regeneration technology of asphalt pavement is to re-mix the old asphalt pavement with new asphalt pavement materials in a certain proportion after the pretreatment process of milling, recycling and screening, so that it can meet certain requirements. Excellent road performance and use it to re-pave the road surface technology. The traditional asphalt pavement regeneration technology is mainly heat-recycled asphalt mixture technology. The heat-regenerated asphalt mixture technology is to add asphalt rejuvenator to the old asphalt mixt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
CPCY02A30/30
Inventor 徐世法刘军郑立宝索智许鹰乐兴堃段文志
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE