旧沥青路面冷再生机租赁机械如何进行全面施工呢？在现在全面道路建设的基础上， 我们有很多公路方面的技术问题需要解决。现在中国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.

因此， 大量早期修建的公路， 其技术性能已经远远不能适应现代形势的需要。就河北省目前情况来讲， 大部分的省级公路和县级地方道路都是 80年代以前修建的， 这些公路技术等级低， 承载能力差， 并且已经损坏严重， 亟待进行技术改造。

Therefore, the technical performance of a large number of early built highways is far from meeting the needs of modern situations. In terms of the current situation in Hebei Province, most of the provincial and county-level local roads were built before the 1980s. These roads have low technical grade, poor bearing capacity, and have been severely damaged, urgently requiring technical renovation.

冷再生机出租

Rental of cold regeneration machine

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 some additional materials such as aggregate, cement, lime, fly ash, emulsified asphalt, foam asphalt and water on the basis of the original old pavement according to the new design requirements, and use the cold in place recycling equipment, which is actually a large stabilized soil road mixer. Under natural normal temperature, the old pavement (pavement and part of the base) is continuously completed in place The milling, crushing, adding materials, mixing, paving and other processes are carried out, followed by leveling and rolling to 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） , 致使新道路的面层至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，但在绝对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.