冷再生机是道路养护与改造工程中的关键设备，通过对旧路面材料的现场再生利用，实现路面结构的修复与升级，因其的特点，在城乡道路维护中应用广泛。

　　Cold recycling machine is a key equipment in road maintenance and renovation projects. By on-site recycling of old pavement materials, it achieves the repair and upgrading of pavement structures. Due to its environmentally friendly and efficient characteristics, it is widely used in urban and rural road maintenance.

　　在旧路面翻新工程中，冷再生机承担着核心的破碎与拌和任务。当沥青路面出现龟裂、沉陷或车辙等病害时，无需将旧路面材料全部清运出场，冷再生机可直接对路面进行铣刨破碎，将原有沥青面层、基层材料粉碎成粒径均匀的颗粒（通常控制在 30 毫米以下）。同时，设备自带的喷洒系统会按比例添加再生剂（如乳化沥青、水泥或石灰），通过铣刨转子的高速搅拌，使旧料与新添加的结合料充分混合，形成符合强度要求的再生混合料。这一过程能保留 80% 以上的旧路面材料，大幅减少建筑垃圾外运量，尤其适合济南那些周边场地有限、运输不便的城区道路翻新。

　　In the renovation project of old road surfaces, the cold recycling machine undertakes the core tasks of crushing and mixing. When asphalt pavement cracks, sinks, or ruts, there is no need to remove all the old pavement materials from the site. The cold recycling machine can directly mill and crush the pavement, crushing the original asphalt surface layer and base material into uniformly sized particles (usually controlled below 30 millimeters). At the same time, the equipment's built-in spraying system will add rejuvenators (such as emulsified asphalt, cement, or lime) in proportion, and through high-speed mixing by milling rotors, the old materials and newly added binders will be fully mixed to form a regenerated mixture that meets the strength requirements. This process can preserve more than 80% of the old pavement materials, significantly reducing the amount of construction waste transported outside, especially suitable for the renovation of urban roads in Jinan with limited surrounding areas and inconvenient transportation.

　　冷再生机可直接在现场完成基层与面层的再生施工，简化传统修路流程。对于基层破损的道路，设备先对原基层进行深度破碎（通常达 15-30 厘米），掺入水泥等稳定剂后拌和均匀，经碾压后形成新的基层结构；随后在其上再生沥青面层，实现 “一次施工、两层成型”，比传统 “开挖 - 清运 - 回填” 工艺缩短 50% 以上工期。在乡村道路升级改造中，冷再生机可将原水泥路面破碎后，添加乳化沥青再生剂，拌和后碾压成沥青基层，既解决了水泥路面接缝多、易碎裂的问题，又降低了新材料采购成本，每可节省材料费用 30% 左右。

　　The cold recycling machine can directly complete the recycling construction of the base and surface layers on site, simplifying the traditional road repair process. For roads with damaged base layers, the equipment first deeply crushes the original base layer (usually up to 15-30 centimeters), mixes it evenly with stabilizers such as cement, and forms a new base structure after rolling; Subsequently, the asphalt surface layer is regenerated on it, achieving "one-time construction, two-layer molding", which shortens the construction period by more than 50% compared to the traditional "excavation clearing backfilling" process. In the upgrading and renovation of rural roads, the cold recycling machine can crush the original cement pavement, add emulsified asphalt rejuvenator, mix and roll it into asphalt base, which not only solves the problem of multiple joints and fragility of cement pavement, but also reduces the cost of new material procurement, saving about 30% of material costs per kilometer.

　　适应多种路面类型，灵活应对不同修复需求。在沥青路面养护中，冷再生机能针对性处理表层病害，通过添加再生剂恢复旧沥青的黏结性能，使再生混合料的马歇尔稳定度达到 8kN 以上，满足路面承载要求。对于水泥稳定碎石基层，可掺入 3%-5% 的水泥作为再生结合料，拌和后形成的基层 7 天无侧限抗压强度能达到 3-5MPa，适合中等交通量道路使用。甚在砂石路面升级为硬化路面时，冷再生机可将原有砂石材料与水泥拌和，直接碾压成型，减少砂石料外运与新料进场，适应乡村地区就地取材的需求。

　　Adapt to various types of road surfaces and flexibly respond to different repair needs. In the maintenance of asphalt pavement, cold recycling can effectively treat surface diseases, restore the bonding performance of old asphalt by adding recycling agents, and achieve a Marshall stability of over 8kN for the recycled mixture, meeting the pavement bearing requirements. For cement stabilized crushed stone base, 3% -5% cement can be added as recycled binder. After mixing, the base formed can achieve a 7-day unconfined compressive strength of 3-5 MPa, which is suitable for use on medium traffic roads. Even when upgrading sand and gravel pavement to hardened pavement, the cold recycling machine can mix the original sand and gravel materials with cement, directly roll them into shape, reduce the transportation of sand and gravel materials and the entry of new materials, and meet the demand for local materials in rural areas.

　　低温作业特性拓展了施工窗口期。与热再生设备需对材料加热 160℃以上不同，冷再生机在常温下即可作业，避免了高温加热产生的有害气体排放，也不受冬季低温影响（只要地面不结冰，均可施工）。这一特点让济南的道路养护工程能突破季节限制，在春秋季黄金施工期外，冬季也可进行小规模病害修复，避免病害因拖延而扩大。同时，常温作业减少了对周边环境的热污染和噪音干扰，适合学校、医院周边等对施工环境要求高的区域。

　　The low-temperature operation characteristics have extended the construction window period. Unlike hot regeneration equipment that requires heating materials to above 160 ℃, cold regeneration machines can operate at room temperature, avoiding harmful gas emissions from high-temperature heating and not affected by low winter temperatures (as long as the ground is not frozen, construction can be carried out). This feature allows road maintenance projects in Jinan to break through seasonal limitations. In addition to the golden construction period in spring and autumn, small-scale disease repairs can also be carried out in winter to avoid the expansion of diseases due to delays. At the same time, working at room temperature reduces thermal pollution and noise interference to the surrounding environment, making it suitable for areas with high construction environment requirements such as schools and hospitals.

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