The on-site cold recycling of roads belongs to the category of road maintenance and reconstruction. The road cold recycling process refers to making full use of the old paving materials (surface course and base course) of existing asphalt roads, adding some new aggregates when necessary, and adding a certain amount of additives (cement, foam asphalt, emulsified asphalt, lime, fly ash, etc.) in proportion to continuously complete the milling, crushing, mixing The process of paving and compacting to form a new base layer with the required performance quality. This construction process mainly solves the problem of damage to the asphalt pavement base layer.

就地冷再生技术不仅适用于高等级公路的维修与改造，也适用于一般道路及乡间公路的维修与改造。此技术在上世纪五十年代开始在欧美等得到应用，目前已是发达已获得较为普遍的应用，并常常作为路面维修的方案。

The on-site cold regeneration technology is not only suitable for the maintenance and renovation of high-grade highways, but also for the maintenance and renovation of general roads and rural roads. This technology has been widely used in developed countries such as Europe and America since the 1950s, and is often used as a solution for road maintenance.

就地冷再生技术的主要施工机械为集破碎与拌和为一体的路面

The main construction machinery of on-site cold recycling technology is a road surface that integrates crushing and mixing

冷再生机目前国内的机型主要为维特根WR2500及宝马PH121等，保有量不过百台。冷再生机施工工艺没有地域限制，各地的沥再路面均可使用此种工艺。据测算，若推广使用，一个地级市应配置3-5台。

At present, the main models of cold regeneration machines in China are the Wittgen WR2500 and BMW PH121, with a stock of only a hundred units. There are no regional restrictions on the construction process of cold recycling machines, and this process can be used on asphalt pavements across the country. According to calculations, if promoted for use, a prefecture level city should be equipped with 3-5 units.

冷再生机的的工作装置是安装有大量专用铣刨刀的铣刨拌和转子。机器在旧路面上沿工作面行驶，转子下降到设定深度，高速旋转，铣刨并破碎拌和原路面材料（包括面层和基层），同时喷水系统根据行驶速度及铣刨深度，从伴随的水车中抽水，向工作装置罩壳内自动喷洒定量的水。水的输送量通过微处理器控制的泵送系统控制。铣刨转子将水与铣刨料充分拌和均匀。液体稳定剂，例如热沥青（冷再生机可选配乳化沥青喷洒装置）可通过专门设计的喷嘴将乳化沥青喷洒到工作装置罩壳内；粉状稳定剂，如水泥，可按设计添加量事先撒布在再生机工作面上，再生机将粉状稳定剂与路面和水一次性破碎并拌和均匀。

The working device of the cold regeneration machine is a milling and mixing rotor equipped with a large number of specialized milling cutters. The machine travels along the working surface on the old road surface, with the rotor descending to the set depth, rotating at high speed, milling and crushing the raw road material (including the surface layer and base layer). At the same time, the water spraying system draws water from the accompanying water truck based on the driving speed and milling depth, and automatically sprays a certain amount of water into the working device casing. The delivery volume of water is controlled by a microprocessor controlled pumping system. The milling rotor thoroughly mixes water and milling material evenly. Liquid stabilizers, such as hot asphalt (a cold regeneration machine can be equipped with an emulsified asphalt spraying device), can be sprayed into the working device cover through specially designed nozzles; Powder stabilizers, such as cement, can be pre distributed on the working surface of the recycling machine according to the designed dosage. The recycling machine will crush and mix the powder stabilizers with the road surface and water in one go.

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