On site cold regeneration of roads belongs to the category of road maintenance and renovation, which mainly solves the problem of damage to the base layer of asphalt pavement. Specifically, road cold recycling 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, paving and compaction of materials in situ at natural ambient temperature, The process of constructing a new base with the required performance and quality.

就地冷再生技術(shù)不僅適用于高等級(jí)公路的維修與改造，也適用于一般道路及鄉(xiāng)間公路的維修與改造。此技術(shù)在歐美等已得到了較為普遍的應(yīng)用，并常常作為路面維修的方案，隨我國(guó)98年引進(jìn)臺(tái)就地冷再生機(jī)后，近幾年來，就地冷再生技術(shù)在我國(guó)受到了業(yè)內(nèi)人士普遍的關(guān)注與認(rèn)同，推廣普及速度很快

The on-site cold regeneration technology is not only suitable for the maintenance and re
novation of high-grade highways, but also for the maintenance and renovation of general roads and rural roads. This technology has been widely used in countries such as Europe and America, and is often the preferred solution for road maintenance. With the introduction of the first on-site cold regeneration machine in China in 1998, in recent years, the on-site cold regeneration technology has received widespread attention and recognition from industry insiders in China, and its promotion and popularization speed is fast

就地冷再生技術(shù)的主要施工機(jī)具為集破碎與拌和為一體的冷再生機(jī)，我公司現(xiàn)有世界范圍內(nèi)的德國(guó)維特根WR2500S冷再生機(jī)兩臺(tái)套，相配套維特根W2000銑刨機(jī)一臺(tái)套，實(shí)力，走規(guī)?；┕ぶ?。

The main construction equipment for on-site cold recycling technology is a cold recycling machine that integrates crushing and mixing. Our company currently has two sets of the most advanced German Wittgen WR2500S cold recycling machines worldwide, and one set of Wittgen W2000 milling and planing machine to match. Our strength is strong and we are taking the path of large-scale construction.

根據(jù)添加劑的不同，可以把冷再生分為水泥冷再生、泡沫瀝青冷再生、乳化瀝青冷再生、石灰冷再生、粉煤灰冷再生等。目前國(guó)內(nèi)應(yīng)用廣泛的還是水泥冷再生，下邊就以水泥冷再生為例簡(jiǎn)單介紹一下冷再生的工作原理。

According to different additives, cold recycling can be divided into cement cold recycling, foam asphalt cold recycling, emulsified asphalt cold recycling, lime cold recycling, fly ash cold recycling, etc. At present, the most widely used method in China is cement cold recycling. Taking cement cold recycling as an example, let's briefly introduce the working principle of cold recycling.

在要進(jìn)行再生的路面上攤鋪水泥（按試驗(yàn)配合比添加，一般為４％—６％）冷再生機(jī)的核心是裝有大量專用刀頭的銑刨和拌和轉(zhuǎn)子的銑刨鼓。轉(zhuǎn)子向上旋轉(zhuǎn)破碎原路面材料，冷再生機(jī)向前行進(jìn)時(shí)，轉(zhuǎn)子轉(zhuǎn)動(dòng)，冷再生機(jī)通過軟管與水罐車連接，微處理器精確控制水在拌和倉(cāng)中的噴灑量。輸送的水通過銑刨轉(zhuǎn)子將水與銑刨料充分拌和，并達(dá)到需要的佳含水量，從而保證混和料的大壓實(shí)度。

The core of a cold recycling machine is a milling drum equipped with a large number of specialized cutting heads and mixing rotors, which is used to pave cement on the road surface to be recycled (added according to the experimental mix ratio, usually 4-6%). The rotor rotates upwards to crush the raw road surface material. When the cold regeneration machine moves forward, the rotor rotates. The cold regeneration machine is connected to the water tank truck through a hose, and the microprocessor accurately controls the amount of water sprayed in the mixing bin. The conveyed water is thoroughly mixed with the milling material through the milling rotor to achieve the desired optimal moisture content, thereby ensuring the maximum compaction of the mixed material.

液體穩(wěn)定劑，例如熱瀝青（WR2500S冷再機(jī)自帶泡沫瀝青發(fā)泡裝置，可將熱瀝青加熱到160—180℃與少量水混和發(fā)泡）可通過專門設(shè)計(jì)的噴灑嘴將泡沫瀝青噴灑到拌和腔；粉狀穩(wěn)定劑，如水泥，需按設(shè)計(jì)添加量事先撒布在再生機(jī)前的路面上，再生機(jī)將粉狀穩(wěn)定劑與再生料和水一次性拌和。

Liquid stabilizers, such as hot asphalt (the WR2500S refrigerator has its own foam asphalt foaming device, which can heat the hot asphalt to 160-180 ℃ and mix it with a small amount of water for foaming), can spray foam asphalt to the mixing chamber through specially designed spray nozzles; Powder stabilizers, such as cement, need to be pre distributed on the road surface in front of the recycling machine according to the designed dosage. The recycling machine will mix the powder stabilizers with recycled materials and water in one go.

如遇再生層原級(jí)配不良的情況，可在再生前將所缺少的部分集料撒布在路面上，通過與舊料拌和來改善原路面材料的級(jí)配。

If the original gradation of the recycled layer is poor, the missing part of the aggregate can be spread on the road surface before regeneration, and the gradation of the original road material can be improved by mixing with the old material.