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.

就地冷再生技術不僅適用于高等級公路的維修與改造，也適用于一般道路及鄉間公路的維修與改造。此技術在上世紀五十年代開始在歐美等得到應用，目前已是發達已獲得較為普遍的應用，并常常作為路面維修的方案。

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.

就地冷再生技術的主要施工機械為集破碎與拌和為一體的路面

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

冷再生機目前國內的機型主要為維特根WR2500及寶馬PH121等，保有量不過百臺。冷再生機施工工藝沒有地域限制，各地的瀝再路面均可使用此種工藝。據測算，若推廣使用，一個地級市應配置3-5臺。

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.

冷再生機的的工作裝置是安裝有大量專用銑刨刀的銑刨拌和轉子。機器在舊路面上沿工作面行駛，轉子下降到設定深度，高速旋轉，銑刨并破碎拌和原路面材料（包括面層和基層），同時噴水系統根據行駛速度及銑刨深度，從伴隨的水車中抽水，向工作裝置罩殼內自動噴灑定量的水。水的輸送量通過微處理器控制的泵送系統控制。銑刨轉子將水與銑刨料充分拌和均勻。液體穩定劑，例如熱瀝青（冷再生機可選配乳化瀝青噴灑裝置）可通過專門設計的噴嘴將乳化瀝青噴灑到工作裝置罩殼內；粉狀穩定劑，如水泥，可按設計添加量事先撒布在再生機工作面上，再生機將粉狀穩定劑與路面和水一次性破碎并拌和均勻。

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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