旧路改造非常传统的做法是“挖掉旧路面、运走废料、拉来新料、重新铺筑”。这套流程走下来，材料费、运输费、废料处置费层层叠加，工期还长。就地冷再生换了个思路——不挖走，就地拌。旧沥青面层和基层材料在现场破碎、加水泥或泡沫沥青、重新拌合、摊铺突出，一次性形成新的基层。省掉的是材料往返运输和废料外运，留下的是原有路面的骨料价值。

The most traditional method for renovating old roads is to "dig up the old pavement, remove waste materials, bring in new materials, and rebuild". After going through this process, material costs, transportation costs, and waste disposal costs are stacked layer by layer, and the construction period is still long. The idea of on-site cold recycling has changed - don't dig it up, mix it on site. The old asphalt surface course and base course materials shall be crushed on site, added with cement or foam asphalt, remixed, paved and rolled to form a new base course at one time. What is saved is the transportation of materials and waste materials back and forth, leaving behind the value of the original road surface aggregates.

冷再生到底省在哪，算一笔账就清楚。

Where exactly does cold recycling save? It's clear with just one calculation.

传统铣刨重铺，旧料外运和弃置是一笔钱，新集料采购和运输是另一笔钱，两笔加起来往往占基层成本的相当比例。就地冷再生把这两笔同时砍掉，只增加水泥（或泡沫沥青）和再生机的费用。改造一条旧路，材料成本能压下来一截，工期也比传统工艺缩短不少。对省道、国道、市政道路这类需要快速恢复通行的项目，时间本身就是钱。

The traditional milling and planing process involves transporting and disposing of old materials at one cost, while the procurement and transportation of new aggregates are another cost, often accounting for a significant proportion of the grassroots cost. The local cold recycling will cut these two charges at the same time, only increasing the cost of cement (or foam asphalt) and recycling machine. Transforming an old road can reduce material costs and shorten the construction period compared to traditional techniques. For projects such as provincial roads, national roads, and municipal roads that require rapid restoration of traffic, time itself is money.

冷再生不是万能工艺，适用边界要搞清楚。

Cold regeneration is not a universal process, and the applicable boundaries need to be clarified.

就地冷再生擅长处理的是路面结构性破坏——网裂、坑槽、车辙、反射裂缝这些常见病害，可以通过再生一次性处治。它还能在不改变原路面线形和标高的前提下，恢复路面所需的断面和承载能力，对交通的干扰也比大开挖小得多。但如果原路面基层已经严重松散、含水量过高，或者旧料级配已经断档，再生效果就要打折扣，这时候得先评估再决定工艺。

On site cold recycling is good at dealing with structural damage to road surfaces, such as mesh cracks, potholes, ruts, and reflective cracks, which can be treated in one go through recycling. It can also restore the required cross-section and bearing capacity of the road surface without changing the original road shape and elevation, and has much less interference with traffic than large excavations. But if the original pavement base has become severely loose, the moisture content is too high, or the old material grading has been cut off, the regeneration effect will be compromised. At this time, the process needs to be evaluated first and then decided.

设备分两类，选型看工程需求。

There are two types of equipment, and the selection depends on the engineering requirements.

国产冷再生机（如600、700型）和进口维特根2500、250S系列，工作宽度和拌合深度不同，适配的工程规模也不一样。小面积市政道路改造，国产机型够用；高速公路大修、需要稳定拌合深度和均匀度的项目，进口机型的优势更明显。途畅路桥同时提供两类设备，意味着选型时可以根据实际工况匹配，而不是“有什么租什么”。

Domestic cold recycling machines (such as 600 and 700 models) and imported Wittgen 2500 and 250S series have different working widths and mixing depths, and are also suitable for different engineering scales. Small scale municipal road renovation, domestic models are sufficient; The advantages of imported models are more evident in projects that require stable mixing depth and uniformity for highway major repairs. Tuchang Road and Bridge provide two types of equipment at the same time, which means that the selection can be matched according to actual working conditions, rather than "renting whatever is available".

租赁比自购划算的地方，在周转率。

Leasing is more cost-effective than self purchasing in terms of turnover rate.

冷再生机是典型的“项目型设备”，一个项目干完，下一台设备可能几个月没活。自购意味着闲置成本、维保成本、操作手成本全摊在自己头上。租赁把固定成本变成变动成本，有项目就租，没项目不养。途畅路桥的设备清单里，冷再生机从国产到进口都有，同时配套粉料撒布车、平地机、压路机、摊铺机，意味着再生施工的上下游设备可以一站式配齐，不用东拼西凑找机源。

Cold recycling machine is a typical "project-based equipment", where after one project is completed, the next equipment may not be active for several months. Self purchase means that idle costs, maintenance costs, and operating costs are all borne by oneself. Leasing turns fixed costs into variable costs, renting when there are projects, and not supporting when there are no projects. In the equipment list of Tuchang Road and Bridge, cold recycling machines are available from both domestic and imported sources, along with supporting powder spreading vehicles, graders, rollers, and pavers. This means that the upstream and downstream equipment for recycling construction can be fully equipped in one stop, without having to scramble for machine sources.

旧路改造的钱，花在材料运输和废料处置上是非常不值的。就地冷再生把这部分省下来，用在真正提升路面质量的地方。选对工艺、匹配设备、算清周转账——旧路翻新才真正翻出效益。

The money spent on material transportation and waste disposal for the renovation of old roads is the least valuable. On site cold recycling saves this part and uses it to truly improve road quality. Choosing the right process, matching equipment, and calculating weekly transfers - only through renovating old roads can we truly realize the benefits.

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