At present，Asphalt recycled material（RAP）In our country, the structure of asphalt pavement is generally divided into two or three layers.。The scarification and recycling of the old pavement will mix the asphalt mixture of multiple layers together for recycling.，Difficult to deal with stratification and classification，Limited range of gradations used。A large amount of fine aggregate will be increased in the recycling process of cold milling construction of milling machine.。The material processing experts of Deji Machinery discovered from the actual production process，If the specifications of the recycled old material screening are，The narrower the particle size range of the raw material, the more the material，During the feeding processRAPThe degree of segregation and variability is relatively low.。Asphalt recycled material（RAP）The structural composition of a material is generally composed of aggregates,、Asphalt and mineral powder，The internal and external quality characteristics of the material are generally：

     1、Asphalt recycled material（RAP）General classification of particle size：Fine particle size-Medium particle size-Coarse particle size-Extra coarse particle size。

     2、Asphalt recycled material（RAP）Gradation classification before paving：Dense graded asphalt concrete mixture、Semi-open graded asphalt concrete mixture，Open-Graded Asphalt Concrete Mixture Gap-Graded Asphalt Concrete Mixture。

     3、Classification of composition structure：  Dense suspension structure 、Skeletal void structure、 Dense skeleton structure。

     4、Asphalt recycled material（RAP）Mechanical properties and evaluation indexes of the material：Crushing value、Polishing value，Abrasion value、Impact value。

     5、Asphalt recycled material（RAP）Material technical characteristics：Limestone、Granite、Basalt。   

     6、There are two common methods of recovery:First, the old pavement is scarified and recycled.;Condly, the cold milling and recycling of the milling machine。

  

Reclaimed material

Asphalt recycled material（RAP）Compared with the raw material，Change of colloid mechanism，Decreased permeability and viscosity，ButRAPThe asphalt content of the fine collection material is higher，The powder content is high，Low aggregate content，The regeneration value is high。Characteristics of milled materials for pavement recycling，Asphalt recycled material independently developed by Deji Machinery（RAP）Toothed roll crushing and screening equipment（Patent No：202220241546.6），Low-speed flexible crushing technology with toothed roller crusher，Spindle speed is low,YesRAPGradation damage degree is low，In the asphalt recycling material（RAP）In the process of recycling, the wrapping degree of the original asphalt and stone is retained as much as possible.，O that the crushing abrasion between the recovered materials in the crushing process is slower.，The original asphalt recycled material is largely retained（RAP）An oil film，Better preservation of original grade ratio。

     

 Deji MachineryRCS150 Crushing and screening equipment for recycled materials
Incoming of large particle size materialRAPToothed roll crushing equipment is similar.“Rub”The way it's broken，Break up、Squeezing action，It's a good preservation of the originalRAPThe grade ratio and that asphalt wrapping state of the original material，And that problem of false particle size of the recycle material is basically eliminated.，Aggregate gradation is better controlled，Reduced variability of recycled material。

 

 “Rub”The technology has solved the problem accurately.RAPFine aggregate sieving，Greatly improvedRAPRecycling rate。By reasonably adding the proportion of actual production consumption，Reatly reducing the consumption of newly added crude oil，At the same time, it can also meet the road performance requirements.。

Deji Machinery Asphalt Recycled Material（RAP）During the operation of the toothed roll crushing and screening equipment，Application of the latest industrial Ethernet technology and products，Adopt imported original low-voltage electrical appliances，The unitization of the control function is realized.、Equipment modularization，Intelligent system and so on.，High degree of intelligence、The safety factor is reliable、The operation is intelligent and simple。Equipment installation remote control system，Pay attention to the operation status of each equipment in real time，Escort the production and operation of customers。

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PS：Good news！    From now until December 31, 2022，All new and old users who order the crushing and screening equipment for recycled materials of Deji Machinery，You can enjoy multiple discounts。For details, please contact the local sales manager and the offices of Deji Machinery.。