Asphalt pavement regeneration technology is a set of process technologies that involves excavating, recycling, crushing, and screening old asphalt pavements that need to be renovated, and then re mixing them with rejuvenators, new asphalt materials, new aggregates, etc. in a certain proportion to obtain a regenerated asphalt mixture that meets certain road performance requirements, and then re paving the pavement with it. Through road surface regeneration, not only can it meet road performance requirements again, save a lot of material resources and funds, reduce engineering costs, but it can also avoid environmental pollution caused by waste materials, achieve industry circular economy, and promote ecological environment protection.
According to the different mixing and construction temperatures of recycled mixtures, asphalt pavement recycling can be divided into cold recycling and hot recycling. Cold recycled asphalt pavement is the mixing of old road milling and new and old materials at room temperature. It is paved after mixing new asphalt that meets the quality requirements. Cold recycled binder usually uses emulsified asphalt or foam asphalt; During the hot recycling process, heating is required for milling the old road surface and mixing new and old materials. According to different construction scenarios and techniques, asphalt pavement recycling can be divided into factory mixed recycling and on-site recycling. The difference between on-site regeneration and factory mixed regeneration lies in the location where the mixing process occurs. The mixing process for on-site regeneration takes place on the old road surface, while the mixing process for factory mixed regeneration takes place at the mixing plant. The new asphalt produced varies depending on the site.
The most common equipment on the market today should be a jaw crusher, which crushes the extracted rocks by squeezing or tapping. Asphalt recycling mixture is a mixture made by digging, recycling, crushing, and screening old asphalt pavement, and then re mixing it with rejuvenators, new asphalt materials, new aggregates, and other materials in a certain proportion. Various specifications of viscous asphalt are mixed together. However, due to the limited viscosity of the extruded or knocked asphalt mixture, the degree of crushing is low and cannot meet the quality requirements of production. Therefore, the emergence of double roller crushing equipment has solved this problem./
Double axis roller crushing is used to crush recycled materials in a staggered manner, which does not damage the original gradation of RAP. The gap between the crushing rollers can be adjusted to ensure the buffering effect of the crusher. The milling and screening equipment for asphalt pavement recycling has the characteristics of high pass rate, less jamming, low noise, and low failure rate.
