道路改造传统做法是把旧路面挖掉，运走废料，再铺新料。这套流程下来，材料费、运输费、废料处理费加起来是一笔不小的开销，工期也长。就地冷再生技术改变了这个逻辑——旧路面不用挖走，现场破碎、拌合、重新压实，直接变成新基层。

The traditional method of road renovation is to dig up the old road surface, transport away the waste materials, and then lay new materials. Under this process, the material cost, transportation cost, and waste disposal cost add up to a considerable expense, and the construction period is also long. The on-site cold recycling technology has changed this logic - the old road surface does not need to be excavated, it is broken, mixed, and re compacted on site, and directly becomes a new base layer.

一、冷再生省在哪

1、 Where is the Cold Recycling Province located

旧路的沥青层和基层材料本身就是资源，冷再生机就地铣刨、破碎，加入水泥或泡沫沥青等稳定剂，拌合后直接摊铺突出。省掉了废料外运和新料进场两笔大费用，材料成本能降30%到50%。工期也短，封路时间少，对交通影响小。

The asphalt layer and base course materials of the old road are resources themselves. The cold recycling machine is used to mill and crush them on the spot, add stabilizing agents such as cement or foam asphalt, and directly pave and roll them after mixing. By eliminating the two major costs of transporting waste materials and bringing in new materials, material costs can be reduced by 30% to 50%. The construction period is also short, the road closure time is short, and the impact on traffic is minimal.

二、哪些路况适合

2、 Which road conditions are suitable

冷再生适合路面结构强度不足、有车辙、网裂、反射裂缝的路段。它能把旧路面材料再生为基层，然后上面加铺新面层。但如果路基已经有效损坏、翻浆严重，冷再生解决不了深层问题，需要先处理路基。施工前要做路况检测和材料分析，确定再生深度和稳定剂配比。

Cold recycling is suitable for road sections with insufficient structural strength, ruts, mesh cracks, and reflective cracks. It can regenerate old pavement materials into a base layer and then add a new surface layer on top. But if the roadbed has been completely damaged and the frost heave is severe, cold recycling cannot solve the deep problems, and the roadbed needs to be treated first. Before construction, road condition inspection and material analysis should be conducted to determine the depth of regeneration and stabilizer ratio.

三、设备选型看深度和宽度

3、 Equipment selection depends on depth and width

冷再生机分国产和进口，维特根等进口机型作业宽度大、深度控制合理，适合高速公路和主干道。国产600、700机型适合市政道路和县乡公路。租赁时要匹配工程量和路宽，设备太小人手不足，太大又浪费台班费。

Cold recycling machines are divided into domestic and imported models. Imported models such as Wittgen have large operating widths and precise depth control, making them suitable for highways and main roads. The domestically produced 600 and 700 models are suitable for municipal roads and county and township roads. When renting, it is necessary to match the engineering quantity and road width. The equipment is too small and lacks manpower, while the equipment is too large and wastes the shift fee.

四、配套设备要跟上

4、 Supporting equipment should keep up

冷再生不是一台机器的事。粉料撒布车负责撒水泥，洒水车控制含水率，平地机整平，压路机分层突出。配套设备不齐，再生层压实度不够，后期照样开裂。租赁时非常好整套配齐，避免各环节脱节。

Cold regeneration is not a machine's business. The powder spreader is responsible for spreading cement, the sprinkler controls the moisture content, the grader levels it, and the roller rolls it layer by layer. The supporting equipment is incomplete, and the compaction degree of the regeneration layer is insufficient, resulting in cracking in the later stage. It is best to have a complete set of equipment when renting to avoid disconnection in each link.

五、租赁看三点

5、 Rental watch three points

一看设备状况和机手经验，冷再生操作水平直接影响拌合均匀度和深度控制；二看配套能力，能不能提供全套设备和施工队伍；三看响应速度，路面工程工期紧，设备故障能不能快速换机很关键。

By examining the condition of the equipment and the experience of the operators, the level of cold regeneration operation directly affects the uniformity and depth control of the mixing process; Secondly, check the supporting capabilities to see if a complete set of equipment and construction team can be provided; Three factors to consider are response speed. The road construction schedule is tight, and it is crucial to quickly replace equipment in case of equipment failure.

旧路改造不一定要大开挖，冷再生用对了，省钱省时还环保。

The renovation of old roads does not necessarily require extensive excavation. Cold recycling is the right way to save money, time, and environmental protection.