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

（1）设计施工规范与验收评定标准

(1) Design and construction specifications and acceptance evaluation standards

鉴于沥青路面再生具有显著的经济效益和社会环境效益，应该广泛应用，同时，随着我国高等级沥青路面增多，今后必将面临更多的旧路面再生利用的问题。因此，怎样现有研究成果的基础上有组织地再对该项技术进行的、系统的整理加工，并进行必要的试验验证，使该项技术达到规范和标准化，用以指导的道路养护工程建设项目，是摆在我们面前的一项重要任务。

Given the significant economic and social environmental benefits of asphalt pavement recycling, it should be widely applied. At the same time, with the increase of high-grade asphalt pavement in China, there will inevitably be more problems with the recycling and utilization of old pavement in the future. Therefore, how to organize and process the technology comprehensively and systematically on the basis of existing research results, and conduct necessary experimental verification to achieve standardization and standardization of the technology, in order to guide national road maintenance engineering construction projects, is an important task before us.

（2）再生剂的规格化与系列化

(2) Standardization and serialization of regenerants

国外再生剂在都是化工部门研究提供的，我国石油部门目前尚未能顾及。由于过去我国公路大部分沥青路面结构厚度较薄，一般不用再利用，所以对再生剂总的需求量不大。然而，随着我国公路建设的发展，今后沥青路面再生利用作为公路的一项日常应用技术，对再生剂的需求量必将大大增加，为此，扩大再生剂的料源和品种，使之规格化、系列化、将是石化部门和公路部门的共同研究课题。

Regenerative agents are provided by the chemical industry sector in foreign countries, but the petroleum sector in China has not yet taken them into account. Due to the thin thickness of most asphalt pavement structures on highways in China in the past, they were generally not reused, so the total demand for recycled agents was not significant. However, with the development of highway construction in China, the recycling and utilization of asphalt pavement, as a daily application technology for highways, will greatly increase the demand for recycling agents. Therefore, expanding the sources and varieties of recycling agents to standardize and serialize them will be a joint research topic for the petrochemical and highway departments.

（3）旧沥青再生效果的检测

(3) Detection of the regeneration effect of old asphalt

旧料在热态下，旧沥青呈熔融状态，能够与液态的新沥青交融混和而成。然而，这仅是一种理论推测，实际交隔混和的情况到底如何，并无法得知。虽然以再生混合料的物理力学性能试验可间接分析再生效果的优劣，但仍不是一种直观的检测方法。为此，必须研究方便而快速的检测方法。

In the hot state, the old asphalt is in a molten state and can be mixed with new asphalt in liquid form. However, this is only a theoretical speculation, and it is not known what the actual situation of interspecific mixing is. Although the physical and mechanical performance test of recycled mixtures can indirectly analyze the advantages and disadvantages of regeneration effects, it is still not an intuitive detection method. Therefore, it is necessary to study convenient and fast detection methods.

（4）再生机械

(4) Regenerative machinery

铺筑再生沥青路面，工序多，工艺复杂，既要增加用工，又相当麻烦，以致使有些人望而却步。因此，如何提高施工机械化水平，减轻手工劳动，是沥青路面再生技术能否大面积推广的关键。大面积铺筑再生沥青路面，迫切需要路面翻挖机械，旧料破碎、筛分机械，混合料拌和机械等。既要有适于集中厂拌的大型机械，又要有适于养路部门使用的各种小型机具。积极组织力量，制订计划，切实抓好各种再生机械的研制和生产，是刻不容缓。

Paving recycled asphalt pavement involves multiple processes and complex processes, which not only requires additional labor but also is quite troublesome, causing some people to hesitate. Therefore, how to improve the level of construction mechanization and reduce manual labor is the key to the large-scale promotion of asphalt pavement regeneration technology. The large-scale construction of recycled asphalt pavement urgently requires road excavation machinery, old material crushing and screening machinery, and mixture mixing machinery. There should be both large machinery suitable for centralized plant mixing and various small machinery suitable for use by road maintenance departments. It is urgent to actively organize forces, formulate plans, and effectively carry out the research and production of various regenerative machinery.

采用沥青再生技术，可以充分利用旧料，通过选择适当的配比及新旧料的掺和比例，可以再生得到质量相当不错的再生混和料。初步的研究和实践均表明，这种再生混合料可以使用于高等级公路的沥青面层。同时，利用沥青再生技术可以取得相当可观的经济效益和的社会效益。

By using asphalt regeneration technology, old materials can be fully utilized. By selecting appropriate proportions and blending ratios of new and old materials, high-quality recycled mixtures can be obtained through regeneration. Preliminary research and practice have shown that this recycled mixture can be used for asphalt pavement on high-grade highways. Meanwhile, utilizing asphalt regeneration technology can achieve considerable economic and social benefits.

（5）沥青添加剂特性及其混合料路用性能研究

(5) Research on the Characteristics of Asphalt Additives and the Road Performance of Their Mixtures

针对沥青路面在使用过程中出现的诸多病害，人们进行了大量的研究，并指出掺入沥青添加剂可明显改善沥青路面的使用性能；除了常用的树脂类、橡胶类和共聚物类沥青改性剂外，近年来国际上又出现了一些新型添加剂。

A lot of research has been conducted on the various diseases that occur in the use of asphalt pavement, and it has been pointed out that adding asphalt additives can significantly improve the performance of asphalt pavement; In addition to commonly used resin, rubber, and copolymer asphalt modifiers, some new additives have emerged internationally in recent years.

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