What is in situ cold regeneration and geothermal regeneration?

旧沥青路面材料的再生利用，就是将沥青路面经过再生专用设备的翻挖、铣刨、回收、加热、破碎、筛分后，与在再生剂、新沥青、新集料等按一定比例重新拌和，满足一定的路用性能并重新铺筑于路面的一整套工艺。

The recycling of old asphalt pavement materials is a complete set of process to re mix the asphalt pavement with regenerant, new asphalt and new aggregate according to a certain proportion after digging, milling, recycling, heating, crushing and screening of special recycling equipment, so as to meet certain road performance and re pave it on the pavement.

沥青再生养护技术包括冷再生与热再生，其中包括了就地冷再生、厂拌冷再生、就地热再生和厂拌热再生。

Asphalt regeneration and maintenance technology includes cold regeneration and hot regeneration, including in-situ cold regeneration, plant mixing cold regeneration, local geothermal regeneration and plant mixing hot regeneration.

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什么是就地冷再生与就地热再生呢？

What is in situ cold regeneration and geothermal regeneration?

就地冷再生(CIR）是指采用专用的就地冷再生设备，对沥青路面进行现场冷铣刨、破碎和筛分（必要时），渗入一定数量的新集料、再生结合料、活性填料（水泥、石灰等）、水，经过常温拌和、摊铺、碾压等工序，一次性实现旧沥青路面再生的技术，它包括沥青层就地冷再生和全深式就地冷再生两种方式。仅对沥青材料层进行的就地冷再生称为沥青层就地冷再生。沥青层就地冷再生是一种循环利用的再生技术，再生后的材料仍将用于沥青层，主要用于道路的联结层、下面层或柔性基层，也常用于乡村道路的翻修。再生层既包括沥青面层又包括非沥青材料层。称为全深式就地冷再生。全深式就地冷再生可以沥青路面面层、基层的所有病害，但其施工工序复杂、施工成本高。

In situ cold recycling (CIR) refers to the technology of using special in-situ cold recycling equipment to carry out on-site cold milling, crushing and screening of asphalt pavement (if necessary), infiltrate a certain amount of new aggregate, recycled binder, active filler (cement, lime, etc.) and water, and realize the regeneration of old asphalt pavement at one time through normal temperature mixing, paving, rolling and other processes, It includes in-situ cold regeneration of asphalt layer and full depth in-situ cold regeneration. The in-situ cold regeneration of asphalt material layer only is called in-situ cold regeneration of asphalt layer. In situ cold recycling of asphalt layer is a recycling technology. The recycled materials will still be used for asphalt layer, mainly for the connecting layer, lower layer or flexible base of road, 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 in-situ cold regeneration. Full depth in-situ cold recycling can solve all the diseases of asphalt pavement surface and base, but its construction process is complex and the construction cost is high.

就地热再生（HIR）是通过现场加热、翻松、拌和、摊铺、碾压等工序，一次性实现旧沥青路面材料的100%就地再生利用的路面再生技术，施工过程中具有无须铣刨、收集和运输旧路面沥青混合料等优点。此外，就地热再生施工速度快，效率高，通常采用单车道施工，对道路运营影响程度低。但需要非标准化施工设备，对设备的功能和性能要求较高。

Geothermal recycling (HIR) is a pavement recycling technology that realizes 100% local recycling of old asphalt pavement materials at one time through on-site heating, scarifying, mixing, paving, rolling and other processes. It has the advantages of no milling, collection and transportation of old pavement asphalt mixture in the construction process. In addition, geothermal regeneration construction is fast and efficient. Single lane construction is usually adopted, which has a low impact on road operation. However, non-standard professional construction equipment is required, and the function and performance requirements of the equipment are high.

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