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Warm-mixed recycled asphalt mixture and preparation method thereof

A technology of old asphalt mixture and recycled asphalt, which is applied in the field of asphalt mixture and its preparation, can solve the problems of easy aging of hot-mix asphalt, achieve the effects of reducing aging, facilitating storage production, and wide application range

Active Publication Date: 2012-11-28
河源市海川新材料科技有限公司 +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 that hot-mixed asphalt of recycled asphalt mixture is easy to age, the present invention provides a warm-mixed recycled asphalt mixture and a preparation method thereof. The warm-mixed recycled asphalt mixture effectively reduces the The stirring temperature, for this reason the present invention adopts following technical scheme:

Method used

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  • Warm-mixed recycled asphalt mixture and preparation method thereof
  • Warm-mixed recycled asphalt mixture and preparation method thereof
  • Warm-mixed recycled asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 1,575g of old asphalt mixture and 8,514g of new aggregate, heat them to 140°C and dry them, then add them to the mixing pot, pre-mix for 80s, and keep the temperature in the mixing pot at 140°C; heat 306g of asphalt to 145°C and add them to the mixing pot Sprinkle 2.1g of regeneration agent and 31.5g of warm mix agent on the surface of asphalt, and mix in the mixing pot for 80s; add 105g of ore powder into the mixing pot, and stir for 80s to obtain warm mix recycled asphalt mixture, in which the 25% of its weight in the mineral powder is slaked lime; the mixture is taken out of the pan at 135°C and molded at 130°C.

Embodiment 2

[0023] Take 5635g of old asphalt mixture and 4334g of new aggregate, heat them to 145°C and dry them, then put them into the mixing pot, pre-mix for 90s, keep the temperature in the mixing pot at 145°C; heat 737g of asphalt to 150°C, then add them to the mixing pot In the process, sprinkle 36.1g regenerant and 33.8g warm mix agent on the surface of the asphalt, and mix in the mixing pot for 90s; add 564g ore powder into the mixing pot, and stir for 90s to obtain warm mixed recycled asphalt mixture; The mixture is taken out of the pan at 140°C and molded at 135°C.

Embodiment 3

[0025] Take 3150g of old asphalt mixture and 6450g of new aggregate, heat them to 148°C and dry them, add them to the mixing pot, pre-mix for 97s, keep the temperature in the mixing pot at 145°C; heat 480g of asphalt to 148°C and add them to the mixing pot Sprinkle 7.9g of regeneration agent and 31.5g of warm mix agent on the surface of the asphalt, and mix in the mixing pot for 108s; add 420g of ore powder into the mixing pot, and stir for 98s to obtain a warm mix recycled asphalt mixture, in which the 25% of its weight in the mineral powder is slaked lime; the mixture is taken out of the pan at 143°C and molded at 138°C.

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Abstract

The invention discloses a warm-mixed recycled asphalt mixture. The warm-mixed recycled asphalt mixture comprises a waste asphalt mixture, asphalt, new aggregates, mineral powder, a regenerant and a warm-mixed agent; the warm-mixed agent is inorganic aluminosilicate with moisture content of 18-23%; and through taking the weight part of the asphalt as one part, the mixture comprises 3-8 parts of waste asphalt mixture, 5-28 parts of new aggregates, 0.3-1 part of mineral powder, 0.006-0.05 part of regenerant and 0.06-0.12 part of warm-mixed agent. Meanwhile, the invention also discloses a preparation method of the warm-mixed recycled asphalt mixture; and in the method, the adding sequence, control temperature and mixing time of each material are described. The warm-mixed recycled asphalt mixture disclosed by the invention fully uses waste asphalt and aggregated rocks, effectively reduces the mixing temperature of recycled asphalt, greatly reduces the emission of poisonous gases such as 'asphalt smoke' and the like, reduces the damages on the environment and the health hazards on the construction personnel, and facilitates the stored production.

Description

【Technical field】 [0001] The invention belongs to the technical field of road engineering materials, and relates to an asphalt mixture and a preparation method thereof. 【Background technique】 [0002] Over the past 30 years of reform and opening up, my country's highway construction has developed rapidly. As a basic industry of the national economy, the development of highway construction has played an important role in accelerating the construction of a unified market, realizing the effective allocation of resources, promoting regional coordinated development, increasing the degree of opening up, and promoting national economic development and social development. Progress played an important role. After the peak period of road construction, a large number of roads will face reconstruction and maintenance. At this time, a large amount of old asphalt mixture will be produced. These old asphalt mixtures will cause great pollution to the environment and soil. How to use and recy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B18/16
CPCY02A30/30Y02W30/91
Inventor 李志英何唯平
Owner 河源市海川新材料科技有限公司
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