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Warm mixing agent, regenerant and preparation method of warm-mixed recycled asphalt mixture

A technology of reclaimed asphalt and reclaiming agent, applied in the preparation of reclaiming agent and warm mix reclaimed asphalt mixture, and the field of warm mix agent, can solve the problems of poor performance, crack resistance and fatigue resistance of warm mix reclaimed asphalt mixture. , to solve the effect of poor fatigue resistance, improve strength and improve adhesion performance

Active Publication Date: 2021-02-12
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, due to the selection of warm mix agent and regeneration agent, the selection of asphalt mixture additives, and the mixing and molding process of asphalt mixture, the performance of warm mix recycled asphalt mixture in China is poor, especially the anti-corrosion Cracking and fatigue resistance are significantly different from fresh asphalt mixture

Method used

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  • Warm mixing agent, regenerant and preparation method of warm-mixed recycled asphalt mixture
  • Warm mixing agent, regenerant and preparation method of warm-mixed recycled asphalt mixture
  • Warm mixing agent, regenerant and preparation method of warm-mixed recycled asphalt mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of warm mixing agent: After mixing polyamide wax, chlorinated paraffin, resin, aromatic hydrocarbon and castor oil according to the mass ratio of 20.1:11.9:8.2:10.4:3.1, melt shearing at 120-130°C for 10 ~12min to make. The amount of warm mix agent is expressed as a percentage of the total amount of old and new asphalt.

[0037] Preparation of regenerant: It is made from waste oil, waste rubber powder, anti-aging agent, and plasticizer under the condition of 70-80°C and then cooled to room temperature; among them, 3 parts of waste oil and 1.1 parts of waste rubber powder , 0.12 parts of anti-aging agent, 0.11 parts of plasticizer. The amount of regenerant is expressed as a percentage of the old asphalt mass.

[0038] Preparation of warm-mix regeneration compound agent: Weigh warm-mix agent and regeneration agent, mix the two, and melt and shear at 110°C to 120°C for 5-7 minutes to make warm-mix regeneration compound agent. In this example, warm-mix agent a...

Embodiment 2

[0050] Raw material and gradation are equal to embodiment 1, and difference is as follows:

[0051] (1) Rejuvenator: It is made of waste oil, waste rubber powder, anti-aging agent, and plasticizer under the condition of 70-80°C after fully stirring and mixing, and then cooled to room temperature; among them, 4 parts of waste oil, 1.2 parts of waste rubber powder parts, 0.13 parts of anti-aging agent, and 0.1 part of plasticizer.

[0052] (2) The mixing ratio of new mineral powder is 5%, of which 3% is replaced by mica powder with close gradation, and the other 2% is also made of new mineral powder with limestone powder.

[0053] (3) The consumption of warm mix agent and regeneration agent, this example is respectively 3.1% of new and old asphalt total amount and 7.7% of old asphalt quality; Warm mix regeneration compound agent: the mass ratio of this routine warm mix agent and regeneration agent is 1 :1.15.

Embodiment 3

[0055] Raw material and gradation are equal to embodiment 1, and difference is as follows:

[0056] (1) Rejuvenator: It is made of waste oil, waste rubber powder, anti-aging agent, and plasticizer under the condition of 70-80 ° C and fully stirred and mixed, and then cooled to room temperature; among them, 5 parts of waste oil, 1.3 parts of waste rubber powder part, 0.14 part of antiaging agent, and 0.09 part of plasticizer.

[0057] (2) 5% of the new mineral powder is all replaced by mica powder with close gradation.

[0058] (3) The consumption of warm mix agent and regeneration agent, this example is respectively 3.1% of new and old asphalt total amount and 7.6% of old asphalt quality; Warm mix regeneration compound agent: the mass ratio of this routine warm mix agent and regeneration agent is 1 :1.13.

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Abstract

The invention provides a warm mixing agent, a regenerant and a preparation method of a warm-mixed recycled asphalt mixture. The warm mixing agent is prepared by mixing polyamide wax, chlorinated paraffin, resin, aromatic hydrocarbon and castor oil according to the mass part ratio of 20.1: 11.9: 8.2: 10.4: 3.1, and then melting and shearing for 10-12 minutes at the temperature of 120-130 DEG C; theregenerant is prepared by fully stirring and mixing illegal cooking oil, an anti-aging agent, waste rubber powder and a plasticizer at 70-80 DEG C and then cooling to normal temperature; according tothe preparation of the warm-mixed recycled asphalt mixture, the dosage of each component is determined according to tests, a certain amount of old RAP material is doped under the action of the warm mixing agent and the regenerant to prepare the new warm-mixed recycled asphalt mixture, and the prepared new warm-mixed recycled asphalt mixture has good advantages of fatigue resistance, stable strength and the like. According to the method, waste utilization is combined, material selection is optimized, regeneration of the old asphalt pavement is achieved, and meanwhile energy conservation, environmental protection and excellent performance are achieved.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement warm regeneration, in particular to a preparation method of a warm mix agent, a regeneration agent and a warm mix recycled asphalt mixture. Background technique [0002] Asphalt pavement thermal regeneration technology is the process of mixing new asphalt, new mineral materials and a certain amount of old asphalt mixture at a high temperature of 150°C to 180°C, and then paving and rolling to form asphalt pavement. In recent years, asphalt thermal recycling technology has received widespread attention, which can reuse old asphalt pavement. However, in the process of thermal regeneration, heating new and old materials at high temperature is a very energy-consuming process, which is not conducive to energy saving and emission reduction, and will cause thermal aging of the asphalt in the old materials again. Warm mix regeneration technology is a combination of warm mix cooling technology and...

Claims

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Application Information

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IPC IPC(8): C04B24/36C04B18/16C04B26/26C04B24/00C04B18/22C04B14/20C04B18/24C04B24/24
CPCC04B40/0039C04B18/16C04B26/26C04B24/001C04B18/22C04B24/24C04B24/00C04B14/20C04B18/248C04B24/287C04B24/36C04B24/08C04B2103/60C04B2103/32Y02W30/91
Inventor 程英伟何秄僷汪为巍
Owner WUHAN POLYTECHNIC UNIVERSITY
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