Benefiting from the recycling of waste asphalt mixture in environmental protection、Win-win benefits in terms of energy saving and project cost reduction，Its application is becoming more and more popular in road construction in China.。The study found，Through the analysis of the proportion of waste materials and the way of adding，Its grading pairs the scope of use.、Cost、Quality has had a profound impact.。The finer the grading，Recycled materialRAPThe higher the mixing ratio，It is endowed with high economic value.。
01 Problems encountered
The screening, crushing and recycling of recycled asphalt mixture is a complex and important process.，Which relates to the effective treatment of waste asphalt pavement materials.，So that it can be reused and incorporated into a new asphalt mixture。The greater viscosity makes fine sieving extremely challenging，Thereby reducing the value of the asphalt recycled material.，In a limited space，How can it be simplified to maximize its effectiveness?，Increase productivity？
02 Solution
The R & D team of Deji Machinery has continuously studied the crushing and screening technology of old materials.，CreatedRCSSeries of crushing and screening equipment for recycled old materials，The equipment relies on the most advanced flexible toothed roll crushing and screening technology.，Easily handle recycled fine aggregate sieving and moisture、The challenge of crushing and screening of bonded aggregate。
Deji MachineryRCSSeries of recycled material screening equipmentTechnical features：
01.
Adopt flexible crushing technology，One side of the crushing tooth is provided with a slope structure.，Play the role of unloading，Avoid destroying the original gradation due to hard extrusion of aggregate；The crushing teeth between the two roller heads are engaged in a staggered manner.，Axially asymmetrically arranged，Reclaimed material moves axially while passing through the roll gap，Realize the rubbing and scattering，Cut the recycled pavement material、Squeeze、Bending action，Compared to a broken jaw、Impact break，Reduces the impact on the recycled material，Thereby reducing dust emission.，And that stable operation of the equipment is ensure.。Similar for recycled material“Rub”The crushing action of，Reatly reducing the crushing of large-particle material，Break apart that recovered material、Squeezing action，Reduces the generation of fine material，It is also conducive to retentionRAPRaw grade ratio。
02.
The two double-roller crushing heads are arranged in a plane differentiation way.（Horizontal misalignment），And that bite area of the broken teeth is increase.，So that that productivity of the crush is improved。The maximum particle size of this Crusher can reach 150mm，A significant increase in crushing efficiency is achieved.。
03.
The Crusher operates at low speed.，To enhance the impact of the crushing tooth stick on the material“Rub”Action，Further reducing the hard impact extrusion effect on the recycled material，O as to realize real flexible crushing.，And the generation of new sections of fine materials and aggregates is less.，And that use of asphalt oil is reduce。
04.
The structure of the screening system is the same as that of the vibrating screen in the Asphalt Mixing Plant.，No matter the 2-gear material or the 3-gear material is discharged, it is integrated in a vibrating screen.，Reduce site layout area。
05.
The control system is equipped with a self-protection device，When encountering an impassable hard object，Two roller heads will have up to 5 consecutive forward and reverse rotation attempts.，If you still can't get through，The shutdown is forced，Operator intervention check，Prevent foreign matter from entering the mix。
RCSSeries of crushing and screening equipment can be flexibly adjusted according to demand，One is the final finished material 0 of two grades.-10mm、10-25mm，One is the final finished material 0 of the three-grade material.-8mm、8-16mm、16-30mm，Specific specifications can be adjusted according to actual requirements.。
0-8mm
8-16mm
16-30mm
This recycled material crushing and screening equipment designed by Deji Machinery，Fixed type is adopted、Modular design，Convenient installation，Easier to relocate，And that occupy space is small，Low noise，And that operation safety factor is high，The overall height is low.，Easy to install in limited spaces，And is beneficial to that layout of the production line。
As far as the current situation of recycling technology of waste pavement materials in China is concerned,，For YesRAPEngineering projects with high reference regeneration technical requirements，The construction quality can only be guaranteed by matching appropriate crushing and screening equipment for recycled materials.。Deji mechanical combination for many yearsRAPR & D experience of regeneration equipment and verification of landing project，This set of techniques is well suited for high referenceRAPMaterial pretreatment process of mixture，Help the development of user projects。
