旧沥青路面冷再生机租赁机械如何进行施工呢？在现在道路建设的基础上， 我们有很多公路方面的技术问题需要解决。现在面临公路运输已呈现出大流量、重荷载的局面。提高公路的使用价值是非常迫切的问题。

How to carry out comprehensive construction of old asphalt pavement cold recycling machine rental machinery? On the basis of comprehensive road construction, we have many technical problems in the field of highways that need to be solved. Now China is facing a situation of high traffic and heavy loads in road transportation. Improving the value of highways is a very urgent issue.

在旧沥青路面改造方面， 河北省邯郸市、廊坊市和石家庄市均先后引进了沥青路面就地冷再生设备， 并进行了大面积的施工尝试， 都获得了很好的经济效益和社会效益。 实践证明， 针对我省的公路现状， 采用就地冷再生施工技术对旧沥青路面进行技术改造是科学可行的。

In terms of the renovation of old asphalt pavement, Handan City, Langfang City, and Shijiazhuang City in Hebei Province have successively introduced on-site cold recycling equipment for asphalt pavement and conducted large-scale construction attempts, all of which have achieved good economic and social benefits. Practice has proven that it is scientifically feasible to use on-site cold recycling construction technology to renovate old asphalt pavement in response to the current situation of highways in our province.

1、就地冷再生的施工原理沥青路面就地冷再生并不是人们通常所理解的将已破损的沥青路面重新恢复到完好的原始状态， 而是将旧面层和部分基层一并打碎混合之后就地改建成新的基层（ 或底基层） 。 严格地讲， 此工艺应该称之为旧沥青路面材料的就地再利用。路面就地冷再生的工作原理， 是在原有旧路铺层的基础上， 按照新的设计要求， 选择性地掺入适量的骨料、水泥、石灰、粉煤灰、乳化沥青、泡沫沥青和水等外加材料， 利用就地冷再生设备，实际上就是一台大型的稳定土路拌机） , 在自然常温下， 就地连续完成对旧铺层（ 路面和部分基层） 的铣刨、破碎、添加料、拌和、摊铺等工序， 随后进行找平和碾压， 终修建出一种特殊级配的道路基层（ 或底基层） 。

1. The construction principle of on-site cold regeneration of asphalt pavement is not commonly understood as restoring damaged asphalt pavement to its original state, but rather breaking and mixing the old surface layer and some of the base layer, and then rebuilding it on site into a new base layer (or sub base layer). Strictly speaking, this process should be referred to as the in-situ reuse of old asphalt pavement materials. The working principle of cold in place recycling of pavement is to selectively add appropriate aggregate, cement, lime, fly ash, emulsified asphalt, foam asphalt, water and other external materials on the basis of the original old pavement layer according to the new design requirements. Using the cold in place recycling equipment, it is actually a large stabilized soil road mixer, Continuously complete the milling, crushing, adding materials, mixing, paving and other processes of the old pavement layer (road surface and some base layers) on site, followed by leveling and rolling, and finally build a special graded road base (or sub base).

2、就地冷再生的适用范围和优点由于就地冷再生施工是将原道路的面层和基层变成了新的道路基层（ 或底基层） , 致使新道路的面层少要在此标高的基础上开始铺筑， 况且在高标准的道路改造中， 有时是将再生层作为底基层， 在此基础上还要加铺二灰碎石等基层材料， 这就使得改造之后的路面标高远远大于原来路面的标高，沿路构造物处路面的设计结构将随之发生变化。如果在城市道路中采用此法施工，原有的排水系统也将随之受到一些影响。 因此， 对于路面标高有较严格限制的道路，不宜采用此法施工。

2. The scope and advantages of on-site cold recycling are due to the fact that on-site cold recycling construction transforms the original road surface layer and base layer into a new road base layer (or sub base layer), which requires the new road surface layer to be laid at least on this elevation. Moreover, in high standard road renovations, sometimes the recycled layer is used as the sub base layer, and on this basis, base materials such as fly ash and crushed stone are also added, This makes the elevation of the renovated road surface much higher than the original elevation, and the design structure of the road surface along the road structure will change accordingly. If this method is used for construction on urban roads, the existing drainage system will also be affected. Therefore, for roads with strict restrictions on road surface elevation, this method should not be used for construction.

虽然就地冷再生的适用范围受到路面标高的限制，但在多数的一般道路改造中，与传统的施工方法相比，依然具有诸多的优点。

Although the applicability of on-site cold regeneration is limited by road surface elevation, it still has many advantages compared to traditional construction methods in the vast majority of general road renovations.

（1）工序简单 由于原有旧路面的材料全部被就地利用， 省略了挖掘6 外运6 厂内加工及回填等一系列工作，使得施工工序大大简化。

(1) The process is simple. Due to the fact that all the materials from the original old road surface are used on site, a series of tasks such as excavation, external transportation, and internal processing and backfilling are omitted, greatly simplifying the construction process.

（2）成本较低 国外的一些施工资料显示，与传统的施工方法相比，由于旧的道路材料得以全部利用，随着再生层厚度的不同，大致可以降低成本 20%~46%。厚度越深，降低成本越多，我国目前在这方面总结的资料还不多，但就从我省对该施工法进行的定额测定结果来看，此工艺能够降低工程成本是肯定的。

(2) According to some construction materials from foreign countries with lower costs, compared with traditional construction methods, due to the full utilization of old road materials, the cost can be reduced by approximately 20% to 46% with different thicknesses of recycled layers. The deeper the thickness, the greater the cost reduction. Currently, there is not much information summarized in this regard in China. However, based on the quota measurement results of this construction method in our province, it is certain that this technology can reduce engineering costs.

（3）提高道路等级 由于该施工法强化了基础的承载能力# 如果新的设计级配合理，可使再生层的强度达到 （ 13-15Mpa） ，从根本上保证了道路等级的提高。这一优点对于低等级道路的改造尤为重要。

(3) The improvement of road grade is due to the construction method strengthening the bearing capacity of the foundation. If the new design grading is reasonable, the strength of the recycled layer can reach (13-15Mpa), fundamentally ensuring the improvement of road grade. This advantage is particularly important for the renovation of low-grade roads.

（4）生产效率高 就地冷再生是在自然条件下进行的，除了个别严重的坑槽需要简单的预处理外，其余路面均不需要任何处理。再加之一次性通过的施工特点，充分地利用了作业时间， 因此大大地提高了生产效率，在水稳路基二灰碎石施工时，经过我们的实地测定，一台 WR2300L型再生机，在组织合理的情况下， 每个工作台班可以再生路面4000㎡以上。

(4) High production efficiency on-site cold regeneration is carried out under natural conditions, and except for a few severe potholes that require simple pre-treatment, all other road surfaces do not require any treatment. In addition, the one-time pass construction feature fully utilizes the working time, greatly improving production efficiency. During the construction of water stabilized roadbed with fly ash and crushed stone, after our on-site measurement, a WR2300L recycling machine can regenerate more than 4000 square meters of road surface per work shift under reasonable organization.

（5）保护环境和资源 因为旧料得以全部就地利用，减少了新材料的开采，也不存在旧料运输和废料随意弃放的问题，施工过程没有粉尘和废气的污染，节约了资源，保护了环境，因此有人称之为“绿色” 施工技术！

(5) Protecting the environment and resources, as old materials can be fully utilized on site, reducing the extraction of new materials, and there is no problem of transportation of old materials and arbitrary disposal of waste materials. The construction process is free from dust and exhaust gas pollution, saving resources and protecting the environment. Therefore, some people call it "green" construction technology!

（6）可以不中断交通施工 由于就地冷再生工序简单“ 投入现场的施工设备很少” 对交通干扰反应不敏感！故此在交通量不太大的情况下“ 可以半幅通车” 半幅施工！

(6) Construction can be carried out without interruption due to the simple on-site cold regeneration process and the lack of construction equipment. It is not sensitive to traffic interference! Therefore, in situations where the traffic volume is not too high, half of the construction can be opened to traffic!

3、 常用施工方案

3. Common construction plans

根据原有道路结构和新设计方案的不同， 就地冷再生可以组合出多种施工方案！其实各种施工方案的工作原理都是一样， 区别只是掺入材料的不同而加入的方法也有所不同而已！但就我国北方地区道路结构来讲，以水泥为添加料对沥青路面进行就地冷再生是常用的一种方案！

According to the difference between the original road structure and the new design scheme, on-site cold regeneration can combine multiple construction schemes! In fact, the working principle of various construction plans is the same, and the only difference is that the materials added are different, and the methods used are also different! But in terms of road structure in northern China, using cement as an additive for on-site cold regeneration of asphalt pavement is a commonly used solution!

在利用水泥进行就地冷再生时，外加料主要是水泥，水泥的通常用量按重量计在2%-5%之间比较合适。如果水泥的用量过多，容易使再生层变脆。为了获得良好的压实效果，同时还要加入适量的水。水泥的加入方法有两种！一种是利用人工或专用机械将水泥预先撒布在需要再生的路面上。这时水的加入方法，是通过再生机上所配备的微机控制系统从跟班作业的运水车内输送到再生机的拌和仓中，另一种方法是采用水泥稀浆搅拌输送车，将需要添加的水泥和水搅拌成水泥稀浆，再通过再生机上的控制系统将其输送到再生机的拌和仓中。

When using cement for on-site cold regeneration, the main additive is cement, and the usual dosage of cement is between 2% and 5% by weight, which is more suitable. If the amount of cement used is too much, it is easy to make the recycled layer brittle. In order to achieve a good compaction effect, an appropriate amount of water should also be added. There are two ways to add cement! One method is to use manual or specialized machinery to pre distribute cement on the road surface that needs to be recycled. The method of adding water at this time is to transport it from the accompanying water transport truck to the mixing bin of the regeneration machine through the microcomputer control system equipped on the regeneration machine. Another method is to use a cement slurry mixing truck to mix the cement and water that needs to be added into cement slurry, and then transport it to the mixing bin of the regeneration machine through the control system on the regeneration machine.

上述两种加入方法各有利弊，预撒水泥法工艺简单， 但在施工过程中容易产生灰尘，不过这种方法有一个很大的优点，就是在控制用量方面非常方便。因为在施工中“ 再生机要分几个工作行程才能完成一个作业段内整幅路面的铣刨，而再生层的终碾压要等到整个作业段全部施工工序完成之后才能进行，这就形成先铣刨的路面和后铣刨的路面到终碾压时所等待的时间间隔相差很多，在较热或较干燥的气候里，随着时间的拖延，先铣刨的路面水分蒸发得较多，而后铣刨的路面水分蒸发得较少。

The above two methods of adding each have their own advantages and disadvantages. The pre spreading cement method has a simple process, but it is prone to generating dust during the construction process. However, this method has a great advantage, which is that it is very convenient in controlling the dosage. Because during construction The regeneration machine needs to be divided into several working journeys to complete the milling and planing of the entire road surface within a working section, while the final rolling of the regeneration layer can only be carried out after all construction processes of the entire working section are completed. This results in a significant difference in the time interval between the milling and planing of the road surface and the milling and planing of the road surface until the final rolling. In hot or dry climates, as time progresses, the moisture on the milling and planing of the road surface evaporates more, and then The milled road surface evaporates less moisture.

如果预先加入的水量相同，则在终碾压时，道路各个部位的含水量就不同。解决这一矛盾的办法， 就是调整先后施工顺序中的加水量。凭着施工经验，先施工的多加水，后施工的少加水。因为预撒水泥法是灰水分开，所以在调整加水量时不会影响水泥的用量。采用水泥稀浆输入法可以施工中的粉尘污染” 减少施工污染“ 但对单独调整用水量就较困难。

If the amount of water added in advance is the same, the moisture content of different parts of the road will be different during final compaction. The only way to solve this contradiction is to adjust the amount of water added in the construction sequence. Based on construction experience, add more water first and less water later. Because the pre sprinkled cement method separates cement and water, adjusting the amount of water added will not affect the amount of cement used. The use of cement slurry input method can eliminate dust pollution during construction and reduce construction pollution, but it is more difficult to adjust the water consumption separately.

6、施工成本的评价

6. Evaluation of construction costs

自从河北省邯郸市交通局于 1998年引进台冷再生机以来， 到目前为止， 已经先后引进了近 10台同类设备，仅在我省就有三台。由于这一工艺目前在我国尚属新生事物，很多相关内容有待进一步探索和总结。为了对冷再生施工的经济成本有一个比较合理的评价，河北省公路工程定额站从定额的角度，于2002年8月对石家庄市公路处所属的冷再生施工现场进行了跟班测定。评价情况如下

Since the introduction of the first cold regeneration machine in China by the Transportation Bureau of Handan City, Hebei Province in 1998, nearly 10 similar devices have been introduced nationwide, including three in our province alone. Due to the fact that this technology is still a new phenomenon in China, many related contents need to be further explored and summarized. In order to have a relatively reasonable evaluation of the economic cost of cold recycling construction, the Hebei Provincial Highway Engineering Quota Station conducted follow-up measurements on the cold recycling construction site of the highway department in Shijiazhuang City from the perspective of quotas in August 2002. The evaluation situation is as follows

（1）旧路概况

(1) Overview of Old Roads

该段公路建于 80年代， 属于三级公路标准。路面宽度为 7.5M，面层为 3cm厚的表处，基层为灰土结构。经过多年重车碾压，路面破损严重。

This section of highway was built in the 1980s and belongs to the standard of third-class highway. The road width is 7.5M, the surface layer is a 3cm thick surface layer, and the base layer is a gray soil structure. After years of heavy vehicle crushing, the road surface is severely damaged.

（2）改造方案

(2) Renovation plan

利用水泥进行就地冷再生， 设计铣刨深度为15cm 实际铣刨深度为 18cm， 水泥的添加量为 3m，再生之后的铺层用做底基层，在此之上还要加铺二灰碎石基层，然后摊铺沥青混凝土面层。

Using cement for on-site cold regeneration, the designed milling depth is 15cm, and the actual milling depth is 18cm. The amount of cement added is 3m, and the regenerated layer is used as the base layer. On top of this, a two ash crushed stone base layer is also added, and then an asphalt concrete surface layer is laid.

（3）工艺流程

(3) Process flow

个别严重的坑槽及翻浆由人工进行预先处理： 在需要再生施工的路面上由人工撒布水泥； 再生机进行铣刨和拌和；运水车跟随再生机向拌和仓内供水 。振动压路机进行稳压；人工测定标高；平地机进行刮平；振动压路机进行碾压；静碾压路机进行终碾压。

Individual severe potholes and mud turning are manually treated in advance: cement is manually spread on the road surface that requires regeneration construction; Recycling machine for milling and mixing; The water truck follows the regeneration machine to supply water to the mixing bin. Vibration roller for voltage stabilization; Manual measurement of elevation; Scraping with a grader; Vibration roller for compaction; The static roller is used for final compaction.

（4）机械配备

(4) Mechanical equipment

投入的机械设备见表1 。

The mechanical equipment invested is shown in Table 1.

（5）人员配备

(5) Personnel allocation

投入施工的各种人员总数 28人。

The total number of personnel involved in construction is 28.

（6）材料用量

(6) Material usage

按 5%的水泥用量计算，添加水泥平均用量 17.1kg/ ， 整个工程平均用水量为1.1kg/ 。两项材料合计金额 5.75元。

Calculated based on a 5% cement dosage, the average amount of cement added is 17.1kg/m2, and the average water consumption for the entire project is 1.1kg/m2. The total amount of the two materials is 5.75 yuan.

（7）产量定额

(7) Production quota

通过实地测定和计算， 该工程的产量定额为 3920/日（8小时） 。

Through on-site measurement and calculation, the production quota of this project is 3920 square meters per day (8 hours).

（8）经济成本评价

(8) Economic cost evaluation

更多的关于冷再生机租赁问题或者详细的内容，请进入我们公司的网站：网站中会有很多的内容仅供参考

For more information or detailed information about leasing cold recycling machines, please visit our company's website: There will be a lot of content on the website for reference only