In recent years, China's highway construction is advancing by leaps and bounds, most of which are asphalt pavement, especially high-grade highway pavement. According to the design service life of asphalt pavement, more than 15% of asphalt pavement needs to be renovated every year in our country, and the amount of abandoned asphalt pavement has reached more than 2.5 million tons per year, and these figures are increasing at the rate of 15% per year. So reasonable use of asphalt recycling technology has become an important topic in highway construction.

根據國外的經驗，瀝青路面材料的循環利用用于新建路面或是路面維修工程中，在技術上是可行的，經濟上也是比較合理的，不會增加過多的成產成本，變廢為寶有利于環境保護。與其他路面修復技術相比較：瀝青路面再生還能在一定程度上減少交通中斷的時間。

According to the experience of foreign countries, the recycling of asphalt pavement materials used in new pavement or pavement maintenance engineering is technically feasible and economically reasonable. It will not increase too much production cost and turn waste into treasure, which is conducive to environmental protection. Compared with other pavement repair technologies, asphalt pavement regeneration can also reduce the time of traffic interruption to a certain extent.

總結起來，瀝青路面材料的循環利用具有降低施工成本、節約集料和瀝青膠結料、保持厚路面的幾何特性、保護環境、節約能源、減少用戶的延誤等優點。

To sum up, the recycling of asphalt pavement materials has the advantages of reducing construction cost, saving aggregate and asphalt binder, maintaining the geometric characteristics of thick pavement, protecting the environment, saving energy, and reducing the delay of users.

因此，如何很好的應用瀝青路面的再生技術，達到預期的經濟效益和社會效益是這里所探討的重 點。

Therefore, how to apply the recycling technology of asphalt pavement to achieve the expected economic and social benefits is the focus of this paper.

路面冷再生的種類很多，根據瀝青再生和回收協會的定義，可分為“熱廠拌再生、熱現場再生、冷廠拌再生、冷現場再生、全厚度再生”。

There are many kinds of pavement cold recycling. According to the definition of asphalt recycling and Recycling Association, it can be divided into "hot plant recycling, hot site recycling, cold plant recycling, cold site recycling and full thickness recycling".

瀝青路面的現場冷再生是指利用舊路面材料經加工后重復利用，根據需要加入部分新骨料成新集料，按比例加入一定量的水泥和適量的水，在自然的環境下連續地完成材料的銑刨、破碎、添加、拌和、攤鋪及壓實成型，重新形成具有所需承能力結構層的一種工藝方法。

The on-site cold recycling of asphalt pavement refers to the reuse of old pavement materials after processing, adding part of new aggregate into new aggregate as required, adding a certain amount of cement and appropriate amount of water in proportion, and continuously completing the milling, crushing, adding, mixing, paving and compaction of materials in natural environment, A process for forming a structural layer with required bearing capacity.

冷再生技術一般用在基層和底基層的再生利用中。對于既有瀝青路面基層和底基層的再生，由于組成的材料復雜，故首要問題是解決材料的分類和破碎，然后按基層或底基層的設計要求進行級配，可以單獨再生后做基層或底基層，也可以與既有瀝青面層一起再生后做基層或底基層。

Cold recycling technology is generally used in the recycling of base and subbase. For the regeneration of the existing asphalt pavement base and subbase, due to the complex composition of the materials, the first problem is to solve the classification and crushing of the materials, and then according to the design requirements of the base or subbase, the grading can be done separately after regeneration, or together with the existing asphalt surface course after regeneration.