Batch-type asphalt cold-recycling blending technology

Abstract

The invention discloses a batch-type asphalt cold-recycling blending technology.The technology comprises the steps that 1, an old asphalt mixture is conveyed to a crushing and screening chamber through a first conveying channel; 2, the old asphalt mixture is crushed and screened in the crushing and screening chamber, and the screened old asphalt mixture enters a stirring chamber; 3, novel aggregates and construction aggregates are added into the stirring chamber to be stirred to obtain a mixture; 4, a certain amount of emulsified asphalt is sprayed to the mixture, a certain amount of water is sprayed to the mixture, and second stirring heads inside the stirring chamber are turned on at the same time for primary stirring; cement is added into the stirring chamber, and the second stirring heads are used for secondary stirring; remaining emulsified asphalt and water are sprayed to the mixture, and the second stirring heads are used for tertiary stirring, and a cold-recycling mixture is obtained.According to the batch-type asphalt cold-recycling blending technology, the problems that crushing is not thorough, spraying is not uniform, and the cold-recycling mixture is poor in quality are solved.

Description

technical field [0001] The invention relates to asphalt cold regeneration mixing technology. More specifically, the present invention relates to a batch-type asphalt cold regeneration mixing process. 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, asphalt cold recycling mixing process methods are different, resulting in a wide variety of related recycling equipment. According to the production process, asphalt cold recycling mixing equipment is divided into two types: continuous type and batch type. Continuous asphalt cold recycling mixing equipment and mixing process have defects such as inaccurate measurement and grading, uneven mixing, and unstable quality of finished materials, which have formed a bad impression among users. It is generally believed ...

AI Technical Summary

Problems solved by technology

Continuous asphalt cold recycling mixing equipment and mixing process have defects such as inaccurate measurement and grading, uneven mixing, and unstable quality of finished materials, which have formed a bad impression among users. It is generally believed that continuous mixing equipment is not suitable Construction of higher grade roads

Continuous asphalt mixing equipment has relatively high requirements for materials, and due to the vigorous development of road construction in my country, the aggregate market has been in short supply for a long time, and the uneven quality of aggregates is not conducive to the domestic application of continuous asphalt mixing equipment

[0003] The intermittent asphalt cold recycling mixing process is widely applicable to various grades of roads, airports, dams, etc., and has the advantages of stable and reliable performance, energy saving and environmental protection, and high measurement accuracy. However, the intermittent asphalt cold recycling mixing process is not yet mature and still exists Problems such as the ratio of each material, the order of adding each material, and the mixing time are not suitable to cause poor quality of cold recycled mixture