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Preparation method of mechanical foamed asphalt warm-mixing recycled mixture

A technology of recycled mixture and mechanical foaming, which is used in ceramic products, applications, household appliances, etc., can solve the problems of white materials, save energy, improve the effect of wrapping, and improve performance.

Inactive Publication Date: 2018-03-06
SHENZHEN ROAD & BRIDGE CONSTR GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to achieve the purpose of warm-mixing recycled asphalt and solve the problem of graying material produced in the production process of conventional plant-mixed recycled asphalt, the present invention provides a method for preparing mechanically foamed asphalt warm-mixed recycled mixture. The warm-mixed recycled asphalt is mixed with Surfactant aqueous solution is used for asphalt foaming to improve the performance of foamed asphalt and the warm mixing effect of recycled asphalt mixture. Material wrapping effect, this present invention adopts following technical scheme:

Method used

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Examples

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Effect test

Embodiment 1

[0027] The indoor preparation method of mechanically foamed asphalt warm mix recycled mixture is as follows:

[0028] (1) Preparation of mechanically foamed asphalt: heat the asphalt to 160°C to make the asphalt have sufficient fluidity, add the asphalt into the foaming chamber heated to 160°C, and spray 2.5% non-ionic surfactant aqueous solution of the asphalt mass at the same time And the air with a pressure of 100bar makes the hot asphalt fully contact and foam in the foaming cavity; the nonionic surfactant aqueous solution is nonylphenol polyoxyethylene ether and polyglycerol succinate aqueous solution.

[0029] (2) Heat 40 parts of the old material RAP that has been crushed and screened into two grades to 90°C and put it into the mixing tank, add 1.2 parts of mechanically foamed asphalt prepared by step (1) and mix for 90 seconds;

[0030] (3) Add 55 parts of new aggregate heated to 170°C to the mixed product of step (2), and at the same time add 1.8 parts of mechanically...

Embodiment 2

[0033] The indoor preparation method of mechanically foamed asphalt warm mix recycled mixture is as follows:

[0034] (1) Preparation of mechanically foamed asphalt: heat the asphalt to 140°C to make the asphalt have sufficient fluidity, add the asphalt into the foaming chamber heated to 150°C, and spray 2.5% nonionic surfactant aqueous solution of the asphalt mass at the same time And the air with a pressure of 100bar makes the hot asphalt fully contact and foam in the foaming cavity; the nonionic surfactant aqueous solution is a dodecylphenol polyoxyethylene ether aqueous solution.

[0035] (2) Heat 30 parts of the old material RAP that has been crushed and screened into two grades to 80°C and put it into the mixing tank, add 1.0 parts of mechanically foamed asphalt prepared by step (1) and mix for 60 seconds;

[0036] (3) Add 64 parts of new aggregate heated to 160°C to the mixed product of step (2), and at the same time add 2.6 parts of mechanically foamed asphalt prepared...

Embodiment 3

[0039] The indoor preparation method of mechanically foamed asphalt warm mix recycled mixture is as follows:

[0040] (1) Preparation of mechanically foamed asphalt: heat the asphalt to 155°C to make the asphalt have sufficient fluidity, add the asphalt into the foaming chamber heated to 155°C, and spray 2.5% non-ionic surfactant aqueous solution of the asphalt mass at the same time And the air with a pressure of 100bar makes the hot asphalt fully contact and foam in the foaming cavity; the non-ionic surfactant aqueous solution is an aqueous solution of octylphenol polyoxyethylene ether and polyglycerol lactate.

[0041] (2) Heat 50 parts of the old material RAP that has been crushed and screened into two grades to 90°C and put it into the mixing tank, add 1.1 parts of mechanically foamed asphalt prepared by step (1) and mix for 90 seconds;

[0042] (3) Add 44 parts of new aggregate heated to 180°C to the mixed product of step (2), and at the same time add 1.4 parts of mechani...

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Abstract

The invention discloses a preparation method of a mechanical foamed asphalt warm-mixing recycled mixture. The preparation method comprises the following steps: (1) mechanical foamed asphalt preparation; (2) heating a RAP material divided into two grades by a crushing screen to 80-90 DEG C, putting in a mixing cylinder and adding a certain quantity of mechanical foamed asphalt prepared in the step(1) for mixing; (3) adding a new aggregate heated to 160-180 DEG C into a mixing product in the step (2) and simultaneously adding a certain quantity of mechanical foamed asphalt prepared in the step(1) for mixing; (4) adding mineral powder into a mixing product in the step (3) for mixing, and discharging. The preparation method disclosed by the invention has the benefits that the hot asphalt isfoamed by utilizing a nonionic surfactant aqueous solution, so that the foamed asphalt performance is improved, and the warm-mixing effect of the recycled asphalt mixture is improved; meanwhile, a wrapping effect of the foamed asphalt with the old and new aggregates is improved by adopting a process that the RAP and the new aggregate are respectively mixed with the mechanical foamed asphalt.

Description

【Technical field】 [0001] The invention belongs to the technical field of road engineering materials, and relates to a method for preparing a mechanically foamed asphalt warm-mix recycled mixture. 【Background technique】 [0002] The waste asphalt mixture is only reduced in function, the asphalt is aged, and the aggregate performance can still be used. Therefore, through the recovery of waste asphalt mixture, adding appropriate new asphalt and new aggregate, heating and mixing evenly can be used as new asphalt mixture for pavement structure. This solves the pollution of the waste asphalt mixture and saves a lot of stone and oil resources. The repeated use of stone and asphalt resources is of great significance to the sustainable development of our country. [0003] Recycling and utilization mainly include in-situ hot regeneration of asphalt pavement, in-situ cold regeneration of asphalt pavement, hot plant-mixed regeneration, and cold plant-mixed regeneration. These methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/50C04B18/16C04B18/12C04B24/32C04B24/283C04B38/10C04B18/167C04B24/285
Inventor 王媛叶智威李明赵普张吉庆卢状黄艳秦贺文邓兆能王超黎军
Owner SHENZHEN ROAD & BRIDGE CONSTR GRP
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