冷再生机和热再生机的主要区别在于工艺过程、成本、适用场景和设备要求。

　　The main differences between a cold regeneration machine and a hot regeneration machine lie in the process, cost, applicable scenarios, and equipment requirements.

　　1. 工艺过程：冷再生机在常温下使用专用机械连续完成铣刨、破碎、添加再生材料、拌和、摊铺、碾压等作业过程；而热再生机则在生产现场进行，将旧沥青热回收再混合成新的混合料材料，通常用于修复沥青路面表面病害，加热路面面层至要求的深度（一般不超过60mm），翻松旧路面，添加还原或再生剂，重新铺筑成型。

　　1. Process: The cold recycling machine uses specialized machinery to continuously complete milling, crushing, adding recycled materials, mixing, paving, rolling and other operations at room temperature; And the hot recycling machine is carried out on the production site, which recovers old asphalt heat and mixes it into new mixture materials. It is usually used to repair surface diseases of asphalt pavement, heat the pavement layer to the required depth (generally not exceeding 60mm), loosen the old pavement, add reducing or regenerating agents, and re pave it into shape.

　　2. 成本：冷再生的成本要低于热再生，因为它可以在现场进行，固定资产和设备的投入较少。

　　2. Cost: The cost of cold regeneration is lower than that of hot regeneration because it can be carried out on-site with less investment in fixed assets and equipment.

　　3. 适用场景：冷再生适用于路面老化、破损严重但不需要深层次修复的情况，主要用于道路的联结层、下面层或柔性基层，也常用于乡村道路的翻修；而热再生适用于路面损伤较轻，只需要进行表层修复的情况。

　　3. Applicable scenarios: Cold regeneration is suitable for situations where the road surface is aging or severely damaged but does not require deep repair. It is mainly used for the connecting layer, lower layer or flexible base layer of roads, and is also commonly used for the renovation of rural roads; Hot regeneration is suitable for situations where road surface damage is relatively minor and only requires surface repair.

　　4. 设备要求：冷再生机使用冷再生专用机械，而热再生需要非标准专业化施工设备，对设备的功能和性能要求较高。

　　4. Equipment requirements: The cold regeneration machine uses specialized machinery for cold regeneration, while hot regeneration requires non-standard specialized construction equipment with high requirements for equipment functionality and performance.

　　综上所述，冷再生和热再生各有优缺点，选择哪种方式取决于具体的工程需求和条件。

　　In summary, both cold regeneration and hot regeneration have their own advantages and disadvantages, and the choice of which method depends on specific engineering requirements and conditions.

　　冷再生和热再生的核心判断标准如下：

　　The core criteria for determining cold regeneration and hot regeneration are as follows:

　　施工温度：热再生技术需要将旧沥青路面铣刨料加热至140-180℃，而冷再生技术在常温下进行，施工温度通常为10-40℃，无需加热。

　　Construction temperature: Hot recycling technology requires heating the old asphalt pavement milling material to 140-180 ℃, while cold recycling technology is carried out at room temperature, and the construction temperature is usually 10-40 ℃, without heating.

　　材料性能与强度：热再生修复后的路面性能接近新铺沥青，抗车辙能力更强，动态稳定度可达3000次/mm以上；冷再生依赖添加剂强度，7天无侧限抗压强度约2-4MPa，适合承重要求较低的路面。

　　Material properties and strength: The performance of the road surface after thermal regeneration repair is close to that of newly laid asphalt, with stronger resistance to rutting and a dynamic stability of over 3000 times/mm; Cold regeneration relies on the strength of additives, with a 7-day unconfined compressive strength of about 2-4MPa, suitable for road surfaces with low load-bearing requirements.

　　成本与养护时间：热再生设备投资高，但施工周期短，综合成本约200-300元/㎡；冷再生能耗减少60%以上，成本约80-150元/㎡，但需更长的养护时间（7-14天）。

　　Cost and maintenance time: Hot recycling equipment requires high investment, but the construction period is short, with a comprehensive cost of about 200-300 yuan/square meter; Cold regeneration reduces energy consumption by more than 60%, with a cost of about 80-150 yuan/square meter, but requires longer maintenance time (7-14 days).

　　此外，应用场景也是重要判断标准：

　　In addition, the application scenario is also an important criterion for judgment:

　　热再生适用于高速公路、城市主干道等高要求场景，特别是路面损坏以表层裂缝、老化为主的情况。

　　Hot regeneration is suitable for high demand scenarios such as highways and urban main roads, especially when the road surface is mainly damaged by surface cracks and aging.

　　冷再生适合基层加固或低等级道路，如乡村道路翻修，也可用于道路的联结层、下面层或柔性基层。

　　Cold regeneration is suitable for grassroots reinforcement or low-grade roads, such as rural road renovation, and can also be used for the connecting layer, lower layer, or flexible grassroots of roads.

　　两种技术可结合使用，例如热再生修复面层后，冷再生加固基层，实现全结构再生。

　　Two techniques can be used in combination, such as hot regeneration to repair the surface layer and cold regeneration to reinforce the base layer, achieving full structural regeneration.

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