就地冷再生省的是外运废渣和新石料的钱，但翻车也快——机器转着、粉料飘着、压路机没跟上，半年后网状裂缝全回来。租设备本质是租“旧路变基层”的工艺闭环。

On site cold recycling saves money on transporting waste residue and new stone materials, but it also overturns quickly - the machines are spinning, the powder is floating, and the roller is not keeping up. Half a year later, all the network cracks will return. The essence of renting equipment is to rent a closed-loop process of "transforming old roads into grassroots".

一、机型先对路幅和深度

1、 First, check the road width and depth for the model

村道、园区、窄路面（再生深8–15cm）：国产550/600型够用，性价比高；

Village roads, parks, narrow road surfaces (recycled depth 8-15cm): Domestic 550/600 models are sufficient and cost-effective;

国省干道、市政主路、深20cm+或含水泥稳定旧基层：上维特根2500、250S，转子扭矩、喷洒计量、深度控制稳得多。

National and provincial main roads, municipal main roads, deep 20cm+or cement stabilized old base: Upper Wirtgen 2500, 250S, rotor torque, spray metering, depth control are much more stable.

拿窄幅机硬啃宽主路，不是宽度差半米，就是深度啃不动老基层。

Using a narrow width machine to forcefully gnaw on a wide main road, either the width difference is half a meter, or it cannot deeply gnaw on the old grassroots.

二、单租主机＝给自己留坑

2、 Renting a single host=leaving a pit for oneself

冷再生机后面建议跟一条线：粉料撒布车（陆达/徐工16–18方）+洒水车+平地机+单钢轮/胶轮压路机。水泥靠人工撒，剂量飘、含水率靠手感，压实度永远到不了98%。途畅这类自带全套路基路面设备的队，优势不是“车多”，是撒布车和再生机同队操作、计量能对表。

After the revival of cold energy, there must be a line: powder spreading vehicle (Landa/XCMG 16-18 square meters)+sprinkler truck+grader+single steel wheel/rubber wheel roller. Cement relies on manual sprinkling, dosage floating, moisture content relying on hand feel, and compaction degree can never reach 98%. Teams like Tuchang, which come with a complete set of roadbed and pavement equipment, do not have the advantage of having too many vehicles, but rather the ability to operate and measure spreaders and recycling machines in the same team.

三、现场锁死三个数

3、 Lock three numbers on site

再生深度误差≤10mm，超声波+操作手双校；

Regeneration depth error ≤ 10mm, dual calibration by ultrasound and operator;

水泥/乳化沥青计量按配合比走，粉料车每100m抽样复核；

The measurement of cement/emulsified asphalt shall be carried out according to the mix proportion, and the powder truck shall conduct a sampling review every 100m;

行进2–5m/min，初压卡非常佳含水、终压赶在水泥初凝前，先跑≥200m试验段定参数。

Travel at a speed of 2-5m/min, with the optimal moisture content for initial pressing and final pressing before the initial setting of cement. Run a test section of ≥ 200m to set the parameters.

四、计价别只选便宜的

4、 Don't only choose cheap prices for pricing

路况清、工期松→台班制；病害杂、怕超支→按㎡包干，但合同写死：含不含撒布车、油料、进出场、补压、取芯不合格返工。只报“冷再生机台班价”的，后期加价空间比设备本身大。

Clear road conditions and loose schedule → shift system; Due to various diseases and fears of overspending, the contract is based on a per square meter lump sum, but it is explicitly stated in the contract that it does not include the use of spreading vehicles, fuel, entry and exit, pressure compensation, and rework if the core is found to be unqualified. For those who only quote the "cold regeneration machine shift price", there is more room for later markup than the equipment itself.

五、验收不靠“看着平”

5、 Acceptance does not rely on 'looking flat'

钻芯验厚度、压实度（水泥类≥98%）、7d养生后无反射裂缝；原路含油污、沉陷严重、纵坡>6%的段，先局部处理再冷再生。

Core inspection for thickness and compaction degree (cement ≥ 98%), and no reflection cracks after 7 days of curing; For sections of the original road with oil pollution, severe subsidence, and longitudinal slope>6%, local treatment should be carried out first before cold regeneration.

机型对、配套齐、计量准，一公里旧料能省近四成基层成本；凑合干，省下的租金全变返工费。

Model matching, complete matching, accurate measurement, one kilometer of old materials can save nearly 40% of grassroots costs; Make do with it, all the rent saved will become rework costs.