在国道省道翻新、市政道路改造、乡村公路升级以及大面积灰土改良土工程当中，就地冷再生工艺凭借旧料就地利用、工期短、造价可控的特点，已经成为道路修复项目的主流选择。很多施工单位不会长期购置价格高昂的大型冷再生设备，冷再生机出租就成为更加灵活务实的方案，但租赁环节如果只对比台班价格，忽略设备型号匹配、配套机具、机手操作水平，很容易出现拌合深度不足、混合料配比失衡、现场误工等各类问题，影响整个道路项目推进节奏。

In the renovation of national and provincial highways, municipal road reconstruction, rural road upgrading, and large-scale lime soil improvement projects, on-site cold recycling technology has become the mainstream choice for road repair projects due to its characteristics of on-site utilization of old materials, short construction period, and controllable cost. Many construction units do not purchase expensive large-scale cold recycling equipment for a long time. Renting a cold recycling machine has become a more flexible and practical solution. However, if the leasing process only compares the unit price and ignores the equipment model matching, supporting equipment, and machine operator level, it is easy to encounter various problems such as insufficient mixing depth, imbalanced mixture ratio, and on-site delays, which will affect the progress of the entire road project.

市面上可供租赁的冷再生设备分为国产与进口两大类别，国产 550、600 机型性价比突出，适配大部分路基灰土、旧路基层再生作业；维特根 250S 这类进口机型动力强劲，铣刨拌合稳定性好，更适合大深度、高负荷的沥青路面就地再生项目。冷再生施工并不是单台设备独立作业，一套完整的作业班组还需要粉料撒布车、洒水车、压路机、平地机相互配合，粉料撒布车保障水泥、石灰撒布均匀，洒水车实时调控混合料含水率，后续压路机及时跟进压实成型，缺少配套设备，就算冷再生机本身工况完好，也很难做出合格的基层效果。

The cold recycling equipment available for rental on the market is divided into two categories: domestic and imported. The domestic 550 and 600 models have outstanding cost-effectiveness and are suitable for most roadbed lime soil and old roadbed regeneration operations; Imported models such as the Wittgen 250S have strong power, good milling and mixing stability, and are more suitable for on-site asphalt pavement recycling projects with large depth and high load. Cold recycling construction is not an independent operation of a single equipment. A complete operation team also requires the cooperation of powder spreading vehicles, sprinkler vehicles, rollers, and graders. The powder spreading vehicles ensure uniform distribution of cement and lime, the sprinkler vehicles adjust the moisture content of the mixture in real time, and the subsequent rollers follow up on compaction and forming. Without supporting equipment, even if the cold recycling machine itself is in good working condition, it is difficult to achieve qualified grassroots effects.

选择冷再生机出租服务，要结合项目实际工况去敲定设备型号。需要先明确项目是做灰土改良土，还是旧沥青路面就地再生，同时确认设计再生深度、单次施工幅宽，再生深度大的工程要优先选用大功率机型，避免设备长期超负荷作业造成拌合不有效。还要理清租赁模式，市场分为单纯裸机出租，以及设备附带专业操作手的全包租赁，裸机租赁成本低，但需要施工方自行配备熟悉设备的机手，对现场管理经验要求很高；带操作手的全包模式，机手熟悉设备性能，能够根据路面破损情况实时调整行走速度、转子转速，更适合没有相关设备操作经验的施工单位。

When choosing a cold recycling machine rental service, the equipment model should be determined based on the actual working conditions of the project. It is necessary to first clarify whether the project is to improve the soil with lime soil or to regenerate the old asphalt pavement on site. At the same time, the design regeneration depth and single construction width should be confirmed. For projects with a large regeneration depth, high-power machines should be prioritized to avoid incomplete mixing caused by long-term overload operation of equipment. We also need to clarify the leasing model. The market is divided into pure bare machine leasing and full package leasing with professional operators attached to the equipment. Bare machine leasing has low costs, but the construction party needs to equip themselves with operators familiar with the equipment, which requires high on-site management experience; Full package mode with operator, familiar with equipment performance, able to adjust walking speed and rotor speed in real time according to road damage, more suitable for construction units without relevant equipment operation experience.

很多项目租赁之后施工效果达不到设计标准，往往并不是设备本身故障，而是前期沟通不到位。签约之前要确认设备进场时间，大型道路工程工序衔接紧密，设备进场延期就会造成人员窝工；同时明确计费方式，区分按台班计费和按施工平米计费两种模式，把进退场运费、设备故障误工责任写进约定，避免后期产生额外纠纷。实地考察设备状态也十分重要，核心查看铣刨转子刀具磨损情况，刀具磨损严重会直接导致拌合料粗细不均，影响基层整体强度。

Many projects fail to meet the design standards after leasing, often not due to equipment malfunctions, but rather due to inadequate communication in the early stages. Before signing the contract, it is necessary to confirm the equipment entry time. The process of large-scale road engineering is closely connected, and any delay in equipment entry will cause personnel to be idle; At the same time, clarify the billing method, distinguish between billing by shift and billing by construction square meter, and include the freight for entering and leaving the site and the responsibility for equipment failure and delay in work in the agreement to avoid additional disputes in the later stage. Field inspection of equipment status is also very important, with a focus on checking the wear of milling rotor tools. Severe tool wear can directly lead to uneven thickness of the mixture, affecting the overall strength of the base layer.

冷再生现场施工有很多容易被忽略的细节，施工行进速度需要结合路面病害轻重灵活调整，网裂破碎严重的路段要放慢行走速度，保证旧路面材料充分破碎拌合。作业过程中要有技术人员跟随，随时核查实际再生深度、水泥掺加量与混合料含水率，含水率过高会造成后期压实翻浆，含水率偏低混合料松散难以成型。再生拌合完成之后要抓紧时间完成整平、突出，严格把控压实度，做好后期洒水养护，水泥类再生层要留出充足的龄期，达到强度之后再铺筑上部面层，不要为了赶工期直接开放后续施工。

There are many details that are easily overlooked in the on-site construction of cold recycling. The construction speed needs to be flexibly adjusted according to the severity of road surface diseases. For sections with severe mesh cracking and breakage, the walking speed should be slowed down to ensure that the old road surface materials are fully crushed and mixed. During the homework process, technical personnel should follow and check the actual regeneration depth, cement dosage, and moisture content of the mixture at any time. If the moisture content is too high, it will cause later compaction and grouting, while if the moisture content is too low, the mixture will become loose and difficult to form. After the completion of the regeneration mixing, it is necessary to quickly complete the leveling and rolling, strictly control the compaction degree, and do a good job of watering and curing in the later stage. The cement regeneration layer should have sufficient age to reach the strength before paving the upper surface layer. Do not open up the subsequent construction directly in order to meet the construction deadline.

设备进场之后也要做好现场防护，雨天条件不宜开展冷再生作业，雨水会改变混合料配比，影响成型质量。租赁期间要做好日常检查维护，及时更换磨损刀头，留意发动机工作状态，出现异常第一时间停机排查，不能带着故障强行赶工。

After the equipment enters the site, on-site protection should also be done. Cold recycling operations should not be carried out under rainy conditions, as rainwater can change the mixture ratio and affect the quality of molding. During the lease period, daily inspections and maintenance should be carried out, worn cutting heads should be replaced in a timely manner, the working status of the engine should be monitored, and any abnormalities should be immediately stopped for troubleshooting. It is not advisable to rush to work with faults.

对于各类道路改造、路基改良工程项目，合理选择冷再生机出租服务，可以省去大额设备采购投入，灵活匹配不同项目工期需求。优先选择设备型号齐全、具备配套机具和成熟施工经验的租赁服务商，把设备选型、计费模式、现场施工管控全部落实到位，才能更好地发挥就地冷再生工艺的优势，保障道路基层施工质量，控制项目整体成本。

For various road renovation and roadbed improvement projects, choosing a reasonable rental service for cold recycling machines can save on large equipment procurement investment and flexibly match different project schedule requirements. Priority should be given to leasing service providers with complete equipment models, supporting machinery, and mature construction experience. Only by fully implementing equipment selection, billing models, and on-site construction control can the advantages of on-site cold recycling technology be fully utilized to ensure the quality of road base construction and control the overall project cost.

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