With the increase of the service life of asphalt pavement,、Natural oxidation of pavement、Heavy load effect of traveling crane，The speed of destruction is also gradually accelerating.，Therefore, a large number of waste asphalt mixtures are produced in the maintenance process.。How to get a reasonable and efficient resource recycling?，It has become a hot issue in the current road construction.。Foamed asphalt cold recycling technology as a recycling industry“New favorite”，Due to the stable technical performance and lower production cost of the finished product,，In recent years, it has been gradually applied and promoted in the field of highway maintenance.，And good results have been achieved.。
One
Technical overview
Cold Recycling Technology of Foamed Asphalt，Its principle is to inject normal temperature water into hot asphalt.，Make the asphalt expand to form asphalt foam，Reclaimed material with asphalt pavement（RAP）In proportion to the new aggregate、Active filler（Cement、Lime, etc）、Mixing water at normal temperature，Pavement structure layer formed by normal temperature construction and paving。Pavement structure layer formed by the technology，Its mechanism is between rigid base and flexible base.，It is mainly suitable for the upper base course or the lower surface course of asphalt pavement.。This technology can not only give full play to the old asphalt mixture,“Surplus value”，Promote the recycling of old pavement materials，But also can remarkably reduce the energy consumption of the raw stone mineral material resource.，Reduce environmental pollution，Realize the resource reuse of asphalt pavement recycled material，Low-carbon highway maintenance、Green transformation。
Two
Technical features
1
Energy saving and environmental protection
Foamed asphalt cold recycling technology only needs to heat asphalt，Hot-mix asphalt concrete，Does not require heating and drying of the aggregate，Thereby saving a large amount of energy.、Energy consumption。At the same time, this technology can absorb a large number of asphalt recycled materials produced by asphalt pavement renovation.（RAP）The problem of environmental pollution。
2
The construction is convenient
The process for processing and producing the finished product by the technology is simple.、The yield is high、The construction speed is fast，Little impact on construction traffic control。Pavement treated with foamed asphalt cold recycling technology，The traffic function can be quickly restored.，Reduce traffic congestion and inconvenience caused by construction。
3
The performance is excellent
The foamed asphalt cold recycling mixture can be used as the lower surface course and the upper base course of the asphalt，And show good performance.。In addition，The technology can also convert a semi-rigid base into a semi-flexible base.，Prolong the service life of road，And that maintenance cost is reduce。
4
The economic benefit is remarkable
This technology can save a lot of materials.（New aggregate）And energy cost（Hot-mix asphalt concrete），At the same time, the construction period is reduced.，Improve the overall economic benefits of the road。
Three
Application example
Durkee Machinery on the Move：As an industry and technology leader，Deji Machinery insists on bold attempts.、Technology first，In 2021, Deji Machinery and the Highway Science Research Institute of the Ministry of Transport cooperated in research and development.，It has been verified by a large number of engineering practices.，Deji Machinery Launches a Complete Set of Foam Asphalt Cold Recycling Equipment（Have a new type of continuous asphalt foaming device，Patent No：ZL202220853100.9），Achieve very good use effect and user experience。
At the same time, the equipment process can also upgrade and transform the old water-stabilized mixing station for continuous foam asphalt cold regeneration.（Take into account that use of matched emulsify asphalt），At present, it has been successfully applied to upgrade and upgrade the equipment of different brands of water-stabilized mixing stations.。For example, a set of Jilin customers in a domestic brand of 800 water-stabilized mixing station with asphalt foaming device.，Reformed into continuous emulsified asphalt cold recycling equipment，It was successfully commissioned and produced on May 14, 2023.。
Four
Outlook
With the increasing task of highway maintenance and the continuous improvement of environmental protection requirements.，Foamed asphalt cold recycling technology will have a broader development prospect.。Future，This technology will be further promoted and applied in the following aspects.：
1
Technical optimization：In view of the existing main problems of foamed asphalt cold recycling technology，If the mechanical strength is low, the technology should be optimized and improved.。By improving the grading design、Construction technology and the use of additives to improve the mechanical properties and durability of the mixture.。
2
Marketing：Strengthen market promotion，Improve the awareness and acceptance of foamed asphalt cold recycling technology in the industry。Through the holding of technical exchanges、Training courses, etc，Popularize technical knowledge，Promote the application of technology。
Foamed asphalt cold recycling technology as a recycling industry“New favorite”，It has broad development prospects and important application value in the field of highway maintenance.。
