The recycling and utilization of old asphalt pavement materials refers to a complete process of excavating, milling, recycling, heating, crushing, and screening the asphalt pavement through specialized equipment for recycling, and then remixing it with recycled agents, new asphalt, and new aggregates in a certain proportion to meet certain road performance and re lay it on the pavement.

瀝青再生養護技術包括冷再生與熱再生，其中包括了就地冷再生、廠拌冷再生、就地熱再生和廠拌熱再生。

The asphalt recycling and maintenance technology includes cold recycling and hot recycling, including on-site cold recycling, plant mixed cold recycling, on-site geothermal recycling, and plant mixed hot recycling.


 

什么是就地冷再生與就地熱再生呢？

What are on-site cold regeneration and on-site geothermal regeneration?

就地冷再生（CIR）是指采用專用的就地冷再生設備，對瀝青路面進行現場冷銑刨、破碎和篩分（必要時），滲入一定數量的新集料、再生結合料、活性填料（水泥、石灰等）、水，經過常溫拌和、攤鋪、碾壓等工序，一次性實現舊瀝青路面再生的技術，它包括瀝青層就地冷再生和全深式就地冷再生兩種方式。僅對瀝青材料層進行的就地冷再生稱為瀝青層就地冷再生。瀝青層就地冷再生是一種循環利用的再生技術，再生后的材料仍將用于瀝青層，主要用于道路的聯結層、下面層或柔性基層，也常用于鄉村道路的翻修。再生層既包括瀝青面層又包括非瀝青材料層。稱為全深式就地冷再生。全深式就地冷再生可以解決瀝青路面面層、基層的所有病害，但其施工工序復雜、施工成本高。

In situ cold recycling (CIR) refers to the technology of using specialized in situ cold recycling equipment to perform on-site cold milling, crushing, and screening (if necessary) on asphalt pavement, infiltrating a certain amount of new aggregates, recycled binders, active fillers (cement, lime, etc.), and water, and achieving one-time regeneration of old asphalt pavement through processes such as mixing, paving, and rolling at room temperature, It includes two methods: on-site cold regeneration of asphalt layer and full depth on-site cold regeneration. The on-site cold regeneration of only the asphalt material layer is called on-site cold regeneration of the asphalt layer. In situ cold recycling of asphalt layer is a recycling technology, and the recycled material will still be used for the asphalt layer, mainly for the connecting layer, lower layer or flexible base of roads, and also commonly used for the renovation of rural roads. The recycled layer includes both asphalt surface layer and non asphalt material layer. It is called full depth on-site cold regeneration. Full depth on-site cold regeneration can solve all diseases of asphalt pavement surface and base layer, but its construction process is complex and the construction cost is high.

就地熱再生（HIR）是通過現場加熱、翻松、拌和、攤鋪、碾壓等工序，一次性實現舊瀝青路面材料的100%就地再生利用的路面再生技術，施工過程中具有無須銑刨、收集和運輸舊路面瀝青混合料等優點。此外，就地熱再生施工速度快，效率高，通常采用單車道施工，對道路運營影響程度低。但需要非標準專業化施工設備，對設備的功能和性能要求較高。

On site geothermal regeneration (HIR) is a road surface regeneration technology that achieves 100% on-site recycling of old asphalt pavement materials through on-site heating, scarifying, mixing, paving, rolling, and other processes. During the construction process, it has the advantages of no milling, collection, and transportation of old asphalt mixture. In addition, geothermal regeneration construction is fast and efficient, usually using single lane construction, which has a low impact on road operation. However, non-standard specialized construction equipment is required, and the functional and performance requirements of the equipment are high.