冷再生施工技術作為現代公路工程建設中常用的技術手段，憑借環保、高效、經濟等特點，在舊路翻新、路基加固等場景中發揮著重要作用。它無需對舊路面材料進行高溫加熱，直接通過機械對原有路面結構進行破碎、拌和、攤鋪和壓實，實現材料的循環利用，大幅提升了公路施工的資源利用率。

　　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.

　　冷再生施工技術的核心在于對舊路材料的再生利用。施工時，通過專用設備將舊瀝青路面、基層材料進行破碎，同時按比例摻入水泥、石灰、乳化瀝青等再生劑，經充分拌和后形成符合強度要求的新混合料。這種工藝能保留舊材料中 80% 以上的有效成分，減少石料開采和廢棄物外運，降低對周邊環境的影響。例如，在二級公路翻新工程中，原本需要開挖清運的舊路面材料，經冷再生處理后可直接作為新基層的原料，每噸材料能減少約 0.5 噸碳排放，兼具環保與經濟效益。

　　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.

　　該技術的施工流程具有高度集成性。首先對舊路進行勘察，檢測路面結構層厚度、強度及病害分布，確定再生劑種類和摻配比例。隨后，冷再生機沿路線緩慢推進，一邊破碎舊路面，一邊噴灑再生劑并完成初步拌和，破碎深度可根據設計要求調節，通常控制在 10-30 厘米。拌和后的混合料經平地機整平，再用壓路機分層壓實，最后進行灑水養生。整個過程無需傳統熱拌瀝青的拌合站，可在現場連續作業，單機組日均施工長度可達 500 米以上，顯著縮短了施工周期，尤其適合交通流量大的路段，能減少施工對交通的影響。

　　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.

　　冷再生技術的適應性較強，可根據路面損壞程度靈活調整工藝。對于輕微龜裂、沉陷的路面，采用表層冷再生即可恢復路面平整度；對于基層強度不足的路段，可進行全深式冷再生，一次性處理基層和面層，提高路面整體承載能力。在低溫、多雨等復雜氣候條件下，冷再生施工受影響較小，相比熱再生技術更能保證施工進度。例如在雨季施工時，通過控制再生劑含水率和壓實時機，可避免混合料出現 “彈簧” 現象，確保基層壓實度達標。

　　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.

　　在質量控制方面，冷再生施工需重點關注混合料的均勻性和壓實度。拌和過程中需實時監測再生劑用量，確保摻配比例精準；壓實階段采用振動壓路機與輪胎壓路機組合碾壓，先輕后重、先慢后快，保證壓實度達到 96% 以上。施工完成后，需檢測路面的彎沉值、平整度等指標，符合設計要求后方可進行下一步施工。

　　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.

　　冷再生施工技術通過對舊路材料的 “就地再生”，打破了傳統公路施工中 “開挖 - 外運 - 新建” 的模式，在降低工程成本的同時減少了資源消耗和環境污染。隨著材料科學的發展，新型再生劑的應用進一步提升了冷再生混合料的強度和耐久性，使這一技術在現代公路工程中的應用范圍不斷擴大，成為推動公路建設可持續發展的重要手段。

　　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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