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.

根据国外的经验，沥青路面材料的循环利用用于新建路面或是路面维修工程中，在技术上是可行的，经济上也是比较合理的，不会增加过多的成产成本，变废为宝有利于环境保护。与其他路面修复技术相比较：沥青路面再生还能在一定程度上减少交通中断的时间。

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.

总结起来，沥青路面材料的循环利用具有降低施工成本、节约集料和沥青胶结料、保持厚路面的几何特性、保护环境、节约能源、减少用户的延误等优点。

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，如何很好的应用沥青路面的再生技术，达到预期的经济效益和社会效益是这里所探讨的重 点。

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

路面冷再生的种类很多，根据沥青再生和回收协会的定义，可分为“热厂拌再生、热现场再生、冷厂拌再生、冷现场再生、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".

沥青路面的现场冷再生是指利用旧路面材料经加工后重复利用，根据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适量的水，在自然的环境下连续地完成材料的铣刨、破碎、添加、拌和、摊铺及压实成型，重新形成具有所需承能力结构层的一种工艺方法。

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.

冷再生技术一般用在基层和底基层的再生利用中。对于既有沥青路面基层和底基层的再生，由于组成的材料复杂，故首要问题是解决材料的分类和破碎，然后按基层或底基层的设计要求进行级配，可以单独再生后做基层或底基层，也可以与既有沥青面层一起再生后做基层或底基层。

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.