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Preparation method of emulsified asphalt cold recycled mixture

A technology of cold recycled mixture and emulsified asphalt, which is applied in the field of preparation of emulsified asphalt cold recycled mixture, to achieve enhanced adhesion, high and low temperature performance, improved freeze-thaw damage resistance, and improved microscopic uniformity

Inactive Publication Date: 2021-10-29
ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a preparation method of emulsified asphalt cold recycled mixture, to solve or partially solve the technical problems existing in the prior art

Method used

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  • Preparation method of emulsified asphalt cold recycled mixture
  • Preparation method of emulsified asphalt cold recycled mixture
  • Preparation method of emulsified asphalt cold recycled mixture

Examples

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preparation example Construction

[0023] The embodiment of the present application provides a method for preparing emulsified asphalt cold recycled mixture, comprising the following steps:

[0024] S1. Add water to the fine RAP material, vibrate and mix to obtain the first premixed material;

[0025] S2. Add water after mixing the coarse RAP material and the aggregate, and obtain the second premixed material after mixing;

[0026] S3. Add the second premix to the first premix, then add emulsified asphalt, vibrate and mix evenly, then add mineral powder and cement and continue stirring to obtain emulsified asphalt cold recycled mixture;

[0027] Wherein, the particle size of the coarse RAP material is 15-25 mm, and the particle size of the fine RAP material is 0.01-15 mm.

[0028] It should be noted that, in the examples of the present application, the fine RAP material and water were vibrated and mixed to obtain the first premix, and the second premix was obtained after mixing the coarse RAP material, aggrega...

Embodiment 1

[0037] The embodiment of the present application provides a method for preparing emulsified asphalt cold recycled mixture, comprising the following steps:

[0038] S1. In parts by weight, add 65 parts of fine RAP material and 4 parts of water to the vibration stirring equipment, and vibrate and mix for 1 min at a rotation speed of 55 r / min and a vibration intensity of 4 to obtain the first premixed material;

[0039] S2. In parts by weight, add 2 parts of emulsifier to 65 parts of asphalt and stir to obtain emulsified asphalt;

[0040] S3. In parts by weight, mix 15 parts of rough RAP material and 15 parts of limestone, add 1 part of water, and stir evenly to obtain the second premixed material;

[0041] S4. Add the second premix in S3 and the first premix in S1 to Detong DT60ZBW twin-shaft vibrating mixer, then add 4 parts of emulsified asphalt, at a speed of 55r / min and a vibration intensity of 4 Vibrate and mix for 1 minute, then add 4 parts of mineral powder and 1 part of...

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Abstract

The invention provides a preparation method of an emulsified asphalt cold-recycled mixture, which comprises the following steps: adding water into a fine RAP material, vibrating and mixing to obtain a first premixed material; mixing a coarse RAP material with aggregate, adding water, and stirring to obtain a second premixed material; and adding the second premixed material into the first premixed material, then adding emulsified asphalt, vibrating and uniformly mixing, then adding mineral powder and cement, and continuously stirring to obtain an emulsified asphalt cold-recycled mixture, wherein the particle size of the coarse RAP material is 15-25 mm, and the particle size of the fine RAP material is 0.01-15 mm. According to the method disclosed by the invention, the aggregate is more uniformly and fully wrapped by the emulsified asphalt, so that the generation of gray materials is basically eliminated, the adhesion between the emulsified asphalt and the aggregate is enhanced, and the microscopic uniformity of the mixture is improved, thereby effectively improving the high and low temperature performance and freeze-thaw damage resistance of the cold recycled asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of regeneration of emulsified asphalt cold recycled mixture, in particular to a preparation method of emulsified asphalt cold recycled mixture. Background technique [0002] A large amount of waste asphalt mixture (RAP) will be produced in the process of asphalt pavement renovation or reconstruction. If the RAP material is not properly disposed of, it will not only damage the environment, but also cause a huge waste of resources. Reuse of RAP materials in road construction using various recycling technologies is currently the preferred practice for processing RAP materials. The emulsified asphalt cold recycling technology uses emulsified asphalt as a binder for old and new aggregates, thereby forming a cold recycled asphalt mixture that can be applied to the lower layer of the road surface and the base layer. Cold recycling technology can prepare recycled asphalt mixture under normal temperature environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2201/50C04B24/36C04B18/20C04B18/12C04B14/28
Inventor 张烁万宁周旭李猛杨洪磊陈振兴周黎明
Owner ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD
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