冷再生施工技术作为现代公路工程建设中常用的技术手段，凭借环保、高效、经济等特点，在旧路翻新、路基加固等场景中发挥着重要作用。它无需对旧路面材料进行高温加热，直接通过机械对原有路面结构进行破碎、拌和、摊铺和压实，实现材料的循环利用，大幅提升了公路施工的资源利用率。

　　Cold recycling construction technology, as a commonly used technical means in modern highway engineering construction, plays an important role in old road renovation, roadbed reinforcement and other scenarios with its characteristics of environmental protection, efficiency and economy. It does not require high-temperature heating of old pavement materials, but directly crushes, mixes, spreads, and compacts the original pavement structure through machinery, achieving material recycling and greatly improving the resource utilization rate of highway construction.

　　冷再生施工技术的核心在于对旧路材料的再生利用。施工时，通过专用设备将旧沥青路面、基层材料进行破碎，同时按比例掺入水泥、石灰、乳化沥青等再生剂，经充分拌和后形成符合强度要求的新混合料。这种工艺能保留旧材料中 80% 以上的有效成分，减少石料开采和废弃物外运，降低对周边环境的影响。例如，在二级公路翻新工程中，原本需要开挖清运的旧路面材料，经冷再生处理后可直接作为新基层的原料，每吨材料能减少约 0.5 吨碳排放，兼具环保与经济效益。

　　The core of cold recycling construction technology lies in the recycling of old road materials. During construction, the old asphalt pavement and base materials are crushed using specialized equipment, and recycled agents such as cement, lime, and emulsified asphalt are added in proportion. After thorough mixing, a new mixture that meets the strength requirements is formed. This process can retain more than 80% of the active ingredients in old materials, reduce stone mining and waste transportation, and lower the impact on the surrounding environment. For example, in the renovation project of second-class highway, the old pavement materials that originally needed to be excavated and transported can be directly used as raw materials for the new base course after cold recycling treatment, and each ton of materials can reduce about 0.5 tons of carbon emissions, with both environmental and economic benefits.

　　该技术的施工流程具有高度集成性。首先对旧路进行勘察，检测路面结构层厚度、强度及病害分布，确定再生剂种类和掺配比例。随后，冷再生机沿路线缓慢推进，一边破碎旧路面，一边喷洒再生剂并完成初步拌和，破碎深度可根据设计要求调节，通常控制在 10-30 厘米。拌和后的混合料经平地机整平，再用压路机分层压实，最后进行洒水养生。整个过程无需传统热拌沥青的拌合站，可在现场连续作业，单机组日均施工长度可达 500 米以上，显著缩短了施工周期，尤其适合交通流量大的路段，能减少施工对交通的影响。

　　The construction process of this technology is highly integrated. Firstly, conduct a survey of the old road to detect the thickness, strength, and distribution of pavement structural layers, and determine the type and proportion of rejuvenators. Subsequently, the cold recycling machine slowly advances along the route, crushing the old road surface while spraying the recycling agent and completing preliminary mixing. The crushing depth can be adjusted according to design requirements, usually controlled at 10-30 centimeters. The mixed material is leveled by a grader, then compacted layer by layer by a roller, and finally watered for curing. The entire process does not require traditional hot mix asphalt mixing stations and can be operated continuously on site. The daily construction length of a single unit can reach over 500 meters, significantly shortening the construction period. It is especially suitable for road sections with high traffic flow and can reduce the impact of construction on traffic.

　　冷再生技术的适应性较强，可根据路面损坏程度灵活调整工艺。对于轻微龟裂、沉陷的路面，采用表层冷再生即可恢复路面平整度；对于基层强度不足的路段，可进行全深式冷再生，一次性处理基层和面层，提高路面整体承载能力。在低温、多雨等复杂气候条件下，冷再生施工受影响较小，相比热再生技术更能保证施工进度。例如在雨季施工时，通过控制再生剂含水率和压实时机，可避免混合料出现 “弹簧” 现象，确保基层压实度达标。

　　Cold recycling technology has strong adaptability and can flexibly adjust the process according to the degree of road damage. For slightly cracked and sunken road surfaces, surface cold regeneration can restore the smoothness of the road surface; For road sections with insufficient base strength, full depth cold regeneration can be carried out to treat the base and surface layers in one go, improving the overall bearing capacity of the road surface. Under complex climatic conditions such as low temperature and heavy rain, cold recycling construction is less affected and can better ensure construction progress compared to hot recycling technology. For example, during rainy season construction, by controlling the moisture content of the rejuvenator and the timing of compaction, the phenomenon of "spring" in the mixture can be avoided, ensuring that the compaction degree of the base meets the standard.

　　在质量控制方面，冷再生施工需重点关注混合料的均匀性和压实度。拌和过程中需实时监测再生剂用量，确保掺配比例精准；压实阶段采用振动压路机与轮胎压路机组合碾压，先轻后重、先慢后快，保证压实度达到 96% 以上。施工完成后，需检测路面的弯沉值、平整度等指标，符合设计要求后方可进行下一步施工。

　　In terms of quality control, cold recycling construction should focus on the uniformity and compaction of the mixture. Real time monitoring of the dosage of rejuvenator is required during the mixing process to ensure accurate mixing ratios; During the compaction stage, a combination of vibratory rollers and tire rollers is used for rolling, starting with light and then heavy, and starting with slow and then fast, to ensure a compaction degree of over 96%. After the construction is completed, it is necessary to test the road surface's deflection value, flatness and other indicators. Only after meeting the design requirements can the next step of construction be carried out.

　　冷再生施工技术通过对旧路材料的 “就地再生”，打破了传统公路施工中 “开挖 - 外运 - 新建” 的模式，在降低工程成本的同时减少了资源消耗和环境污染。随着材料科学的发展，新型再生剂的应用进一步提升了冷再生混合料的强度和耐久性，使这一技术在现代公路工程中的应用范围不断扩大，成为推动公路建设可持续发展的重要手段。

　　The cold recycling construction technology breaks the traditional mode of "excavation external transportation new construction" in highway construction by "on-site recycling" of old road materials, reducing project costs while minimizing resource consumption and environmental pollution. With the development of materials science, the application of new rejuvenators has further improved the strength and durability of cold recycled mixtures, expanding the application scope of this technology in modern highway engineering and becoming an important means to promote sustainable development of highway construction.

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