冷再生不是一个“一刀切”的工艺。不同施工场景对冷再生机的要求完全不同。租设备之前，先搞清楚自己要做哪种再生。

Cold regeneration is not a one size fits all process. The requirements for cold recycling machines are completely different in different construction scenarios. Before renting equipment, first clarify which type of regeneration you want to do.

工艺一：浅层就地冷再生。 仅处理旧路面的面层，再生深度通常5-10厘米。适用于路面表层老化、裂缝较多的中修工程。对冷再生机的要求：功率适中即可；工作宽度要求不高；核心是铣刨精度高、拌合均匀。租赁时优先选择操控合理的机型。

Process 1: Shallow in-situ cold regeneration. Only the surface layer of the old road surface is processed, and the regeneration depth is usually 5-10 centimeters. Suitable for medium repair projects where the surface of the road is aging and has many cracks. Requirements for the cold regeneration machine: moderate power is sufficient; The working width requirement is not high; The key is high milling accuracy and uniform mixing. Prioritize choosing models with precise handling when renting.

工艺二：全深式就地冷再生。 将路基与旧路面一同铣刨、破碎、拌合，再生深度通常15-25厘米。适用于路面结构层严重损坏的大修工程。对冷再生机的要求：功率建议足够大，能够破碎硬质基层材料；工作宽度要宽，提高施工效率；设备重量要重（如31吨级WR250），避免轻型再生机易出现的“蹦跳”问题。

Process 2: Full depth on-site cold regeneration. Milling, crushing, and mixing the roadbed and old pavement together, with a regeneration depth of usually 15-25 centimeters. Suitable for major repair projects with severe damage to the pavement structure layer. Requirements for cold recycling machine: The power must be large enough to crush hard base materials; The work width should be wide to improve construction efficiency; The equipment should be heavy (such as the 31 ton WR250) to avoid the "jumping" problem that is prone to occur in lightweight regeneration machines.

工艺三：厂拌冷再生。 将旧路面材料铣刨后运输到拌合厂，在厂内添加再生剂和新料进行拌合，再运回现场摊铺。这种工艺对冷再生机本身的要求与就地再生不同——更强调铣刨效率和出料级配的稳定性。租赁时要确认设备能否满足厂拌再生的级配要求。

Process 3: Factory mixed cold recycling. After milling and planing the old pavement materials, they are transported to the mixing plant where rejuvenators and new materials are added for mixing, and then transported back to the site for paving. This process has different requirements for the cold recycling machine itself compared to on-site recycling, emphasizing more on milling efficiency and stability of discharge gradation. When renting, it is necessary to confirm whether the equipment can meet the grading requirements for factory mixed recycling.

选型速查表：

Quick selection checklist:

工艺类型再生深度推荐机型核心要求

Recommended Core Requirements for Process Type Regeneration Depth and Model

浅层就地再生5-10cm中小功率机型铣刨精度高

Shallow in-situ regeneration 5-10cm, high milling accuracy for small and medium power models

全深式就地再生15-25cm大功率重型机型功率大、重量重

Full depth on-site regeneration 15-25cm high-power heavy-duty model with high power and heavy weight

厂拌冷再生视需要铣刨效率高的机型出料级配稳定

Factory mixed cold recycling machines with high milling efficiency and stable discharge gradation as needed

施工前的准备工作至关重要。 无论哪种工艺，施工前都需要对旧路面进行清理和检测，确定再生方案。要用路面构造强度指数PSSI和路面状况指数PCI做好总体评价，确认路面结构是否适合冷再生技术施工。还要准备好所需材料，如水泥、乳化沥青或泡沫沥青等。

The preparation work before construction is crucial. Regardless of the process, the old road surface needs to be cleaned and inspected before construction to determine the regeneration plan. To conduct an overall evaluation using the pavement construction strength index PSSI and pavement condition index PCI, it is necessary to confirm whether the pavement structure is suitable for cold recycling technology construction. Also prepare the required materials, such as cement, emulsified asphalt or foam asphalt.

开始施工时的要点。 速度不要太快，要经常检查拌合的均匀情况和深度，发现与设计有差异时要及时调整。施工前要调好水泥浆的稠度并拌合均匀，水泥浆中的杂质和硬块应用滤网滤出，事先调试好喷嘴的喷浆量。

Key points at the beginning of construction. The speed should not be too fast, and the uniformity and depth of the mixing should be checked regularly. If any differences are found from the design, they should be adjusted in a timely manner. Before construction, the consistency of the cement slurry should be adjusted and mixed evenly. Impurities and hard lumps in the cement slurry should be filtered out with a filter screen, and the spraying amount of the nozzle should be adjusted in advance.

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