Method for stirring renewable asphalt mixture

Abstract

The invention relates to a method for stirring a renewable asphalt mixture. The method comprises the following steps that a renewable recycled material is subjected to primary smashing in a cold state; the renewable recycled material enters a drying cylinder through a recycling ring for heating and softening with new aggregate; a renewable recycled asphalt mixture obtained by mixing the renewable recycled material with the new aggregate enters a continuous double-shaft stirring pan for stirring and rubbing; the renewable recycled material is subjected to secondary smashing; and the renewable recycled asphalt mixture flows out from the discharging hole of the continuous double-shaft stirring pan, enters the charging hole of an aggregate hoisting machine, and is fed into a vibration screen by the aggregate hoisting machine for screening. By the method, various types of aggregate are separated thoroughly after the renewable recycled material is treated; the heated mixture cannot be adhered to the screen mesh of the vibration screen when passing through the vibration screen; the graduation precision of the mixture is improved to a great extent; the method is low in cost and convenient to operate; and the addition ratio of the renewable recycled material is improved.

Description

technical field [0001] The invention relates to the technical field of asphalt regeneration and recovery, in particular to a plant heat tracing regeneration recovery material. Background technique [0002] With the arrival of the overhaul period of highway asphalt pavement in our country, the country vigorously promotes the application of recycled asphalt mixture in engineering. According to different highway engineering construction schemes, the asphalt mixture regeneration process is different, resulting in a wide variety of related recycling equipment. Heat tracing regeneration equipment in asphalt mixture plants is widely used due to the high quality and strong adaptability of the recycled mixture produced. According to the production process, heat tracing regeneration equipment in asphalt mixture plant is divided into two types: continuous type and batch type. Affected by my country's aggregate specification factors, the asphalt mixing equipment used in China is mainl...

AI Technical Summary

Problems solved by technology

[0004] In actual production, since the surface of recycled recycled materials is covered with asphalt, complete crushing cannot be achieved in the early stage of cold separation, crushing and screening.

As the asphalt and aggregates in recycled materials stick together to form aggregates of different sizes, various aggregates cannot achieve the ideal separation state

In addition, since recycled materials are added to new hot aggregates, they are heated during the mixing process. When the weight percentage of recycled recycled materials is greater than 5%, the asphalt recycled materials are heated and softened. Since asphalt sticks various aggregates together, The vibrating screen only screens according to the size, and cannot achieve effective screening at all; at the same time, the asphalt in the recycled material will adhere to the screen of the vibrating screen, resulting in a decrease in production capacity and chaotic grading

The service life of roads paved with mixtures with low gradation accuracy is greatly shortened, and the renovation project requires a lot of manpower and material resources

[0005] Now it is possible to realize the drying cylinder with recycled recycled materials reaching 20% ​​by weight, but the cost is high, and the popularization and use are greatly restricted.

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