The full depth on-site cold recycling construction process mainly uses on-site cold recycling construction equipment to perform cold milling, crushing, and screening on the damaged asphalt pavement that needs to be repaired. Then, new aggregates, recycled binders, cement, lime, water, etc. are added proportionally. After being stirred at room temperature, these materials are laid on the pavement, and then rolled to form. This construction process requires a complete set of processes to be completed in an orderly manner on site. The full depth on-site cold regeneration includes both asphalt material layer and non asphalt material layer.

沥青路面再生技术的优势

Advantages of asphalt pavement regeneration technology

(1)节约成本

(1) Cost savings

在沥青路面的大、中修中使用全深式就地冷再生基层施工工艺与传统的修整沥青路面相比，极大的节约了修整成本。

Compared with traditional asphalt pavement repair, the use of full depth in-situ cold recycled base construction technology in large and medium maintenance of asphalt pavement greatly saves repair costs.

(2)工期缩短

(2) Shorten the construction period

在沥青路面中使用全深式就地冷再生基层施工工艺能够有效的缩短施工工期，尽快使得维修好的沥青路面投入到使用中，同时也能有效的提高施工区域内行车水平。这一施工工艺相比原来的施工工艺来说更加的简便，同时也可以在施工过程中开放交通，保证道路的畅通，不会造成交通拥堵现象。

The use of full depth on-site cold recycling base construction technology in asphalt pavement can effectively shorten the construction period, quickly put the repaired asphalt pavement into use, and also effectively improve the safety driving level in the construction area. This construction process is more simple and efficient compared to the original construction process, and can also open up traffic during the construction process, ensuring smooth road flow and avoiding traffic congestion.

(3)节约资源

(3) Save resources

在全深式就地冷再生基层施工工艺中能够有效的节约资源，促进对环境的保护。它在施工过程中能够将原本在沥青路面建设中使用过的材料进行二次回收利用，特别是一些砂石材料，避免了再次开采这类资源，造成浪费。在回收利用这一系列材料中也能够避免这些材料被废弃占用土地资源，造成环境污染。

In the construction process of fully deep on-site cold recycling base layer, it can effectively save resources and promote environmental protection. It can recycle and reuse the materials originally used in asphalt pavement construction, especially some sand and gravel materials, during the construction process, avoiding the waste of re mining such resources. In the recycling and utilization of this series of materials, it is also possible to avoid these materials being abandoned and occupying land resources, causing environmental pollution.

(4)提高路面的平整度

(4) Improve the smoothness of the road surface

在沥青路面修复过程中采用全深式就地冷再生基层施工工艺能够有效的保留现有道路的完整性结构与净空，同时还能够有效的纠正路面纵断面以及横坡现象，极大的提高了路面的平整度。

In the process of repairing asphalt pavement, the use of the full depth on-site cold recycling base construction process can effectively preserve the integrity structure and clearance of the existing road, while also effectively correcting the longitudinal and transverse slope phenomena of the road surface, greatly improving the smoothness of the road surface.

(5)冷再生基层施工工艺能够复原

(5) The construction process of cold recycled base can be restored

冷再生基层施工工艺适用于修复大面积道路损毁，当采用这一施工工艺进行修复后，路面的使用性能与原先完整的路面无差别，新铺设的路面基本符合原本的路面性能。

The cold recycled base construction process is suitable for repairing large-scale road damage. After using this construction process for repair, the performance of the road surface is no different from the original complete road surface, and the newly laid road surface basically conforms to the original road surface performance.

全深式就地冷再生施工工艺与质量控制措施

Construction technology and quality control measures for full depth on-site cold regeneration

(1)全深式就地冷再生施工工艺原理

(1) Principle of fully deep on-site cold regeneration construction process

全深式就地冷再生施工工艺需要将沥青路面中全部厚度的沥青面层与预定比例汇总的下卧层统一进行粉碎与搅拌融合在一起，以此来提供升级的均匀基层材料的维修技术。若旧材料中没有足够的力学性能与结构强度承载预期中的荷载，那么就需要在其中加入新的集料，同时也需要按照一定的比例加入定量的化学稳定剂，以此来达到预期的效果。

The full depth on-site cold recycling construction process requires the crushing and mixing of the entire thickness of the asphalt surface layer in the asphalt pavement and the predetermined proportion of the underlying layer, in order to provide upgraded and uniform base material maintenance technology. If the old material does not have sufficient mechanical properties and structural strength to carry the expected load, then new aggregates need to be added to it, and a certain proportion of chemical stabilizers need to be added to achieve the expected effect.

冷再生机租赁

Cold regeneration machine leasing

在全深式就地冷再生施工工艺操作中需要再生层的下承层完好无损，且它的厚度应不低于10cm，同时也需要尽可能的满足结构层面所需的强度需求。在全深式就地冷再生技术中，其中厚度对于单一压实层在使用水泥与石灰时要把厚度控制在15~25cm之间。在使用乳化沥青以及泡沫沥青材质时厚度则需要控制在8~16cm之间。单层冷再生层面若厚度过厚那么在压实该层面时就会出现问题，导致相关器械无法压实该层面，特别在越下方的越不易被压实。在满足压实度要求的再生层中，除了应在平均压实度方面达到要求之外，表层5cm与底部5cm之间的密度差距应控制在2%以内。当然在施工过程中也可以选择双层再生，这就需要把存有一定厚度的表层材料进行铣刨，然后再对下面的路面进行就地冷再生，接着将铣刨的表层材料进行搅拌融合再进行铺设。双层再生层面铺设不受之前所描述的厚度的限制。

In the process of full depth on-site cold regeneration construction, it is necessary to ensure that the lower bearing layer of the regeneration layer is intact and undamaged, and its thickness should not be less than 10cm. At the same time, it is also necessary to meet the strength requirements of the structural layer as much as possible. In the full depth in-situ cold regeneration technology, the thickness of a single compacted layer should be controlled between 15-25cm when using cement and lime. When emulsified asphalt and foam asphalt materials are used, the thickness should be controlled within 8~16cm. If the thickness of the single-layer cold regeneration layer is too thick, there will be problems when compacting the layer, causing the relevant equipment to be unable to compact the layer, especially the lower layer, which is less likely to be compacted. In the recycled layer that meets the compaction requirements, in addition to meeting the average compaction requirements, the density difference between the surface 5cm and the bottom 5cm should be controlled within 2%. Of course, double-layer regeneration can also be chosen during the construction process, which requires milling the surface material with a certain thickness, then conducting on-site cold regeneration on the underlying road surface, and then mixing and fusing the milled surface material before laying. The double layer recycled layer laying is not limited by the thickness previously described.

(2)全深式就地冷再生施工中所使用的机械设施设备

(2) Mechanical facilities and equipment used in full depth on-site cold regeneration construction

在运用全深式就地冷再生施工工艺时不需要使用大型机械设备，主要使用的机械设备包含再生设备、稳定剂添加设备、平地机以及压路机。

When using the full depth on-site cold regeneration construction process, there is no need to use large mechanical equipment. The main mechanical equipment used includes regeneration equipment, stabilizer adding equipment, graders, and rollers.

冷再生机租赁主要的功能就在于粉碎与回收材料，它在全深式就地冷再生施工工艺操作中占据着主要的位置。冷再生机租赁可以粉碎、搅拌30cm厚度的沥青路面及下卧层材料。在冷再生机设备中的滚筒中应该装置可以进行替换的碳化钨齿刀具，同时还应装有人力操作与自动操作的装置，另外这一设备也应可以有效的调节滚筒转动速度，以此来适应不同厚度材质的粉碎与搅拌。

The main function of cold recycling machine leasing is to crush and recycle materials, which occupies a major position in the operation of the full depth on-site cold recycling construction process. The cold recycling machine rental can crush and mix asphalt pavement and underlying layer materials with a thickness of 30cm. In the cold regeneration equipment, tungsten carbide toothed cutting tools that can be replaced should be installed in the drum, and manual and automatic operation devices should also be installed. In addition, this equipment should be able to effectively adjust the rotation speed of the drum to adapt to the crushing and mixing of materials with different thicknesses.

另外再生材料中若含水量没有达到既定标准那么就需要让其在通过干燥的过程中达到既定含水量标准，另外若再生材料过干，那么也需要补足水分。冷再生机就可以配备相应的水喷头对再生材料添加水分，在对再生材料粉碎以及搅拌的过程中也可以进行水分的添加，同时在这时添加水分也能更好的进行估计。

In addition, if the moisture content of recycled materials does not meet the established standards, it is necessary to make them meet the established moisture content standards during the drying process. In addition, if the recycled materials are too dry, it is also necessary to replenish the moisture. The cold regeneration machine can be equipped with corresponding water nozzles to add water to the recycled material. During the process of crushing and stirring the recycled material, water can also be added, and adding water at this time can also better estimate.

当在再生材料中添加稳定剂时，若添加的稳定剂为粉状物，那么就需要定量摊铺撒料。干粉稳定剂可以在粉碎沥青层路面时加入也可以在冷再生机搅拌再生材料之前加入。不够粉状物的稳定剂会受到天气因素的影响，另外在定量摊铺撒料操作中也易于产生尘雾，对施工操作人员和环境有着极大的影响。当稳定剂为液体状态加入到冷再生机中时，需要随带的计算机液体添加系统对各个液体添加量进行精准计算，同时也需要有一个与冷再生机前进速度相关的正互锁系统，从而使得液体稳定剂的添加量跟随着冷再生机运行的变化而发生变化。

When adding stabilizers to recycled materials, if the added stabilizers are in powder form, then a quantitative spreading of the material is required. Dry powder stabilizer can be added during the crushing of asphalt layer pavement or before the cold recycling machine mixes the recycled material. Insufficient stabilizer for powdery materials can be affected by weather factors, and in addition, it is prone to generate dust and mist during quantitative paving and spreading operations, which has a great impact on construction operators and the environment. When the stabilizer is added to the cold regeneration machine in a liquid state, the accompanying computer liquid addition system needs to accurately calculate the amount of each liquid added, and there is also a positive interlock system related to the forward speed of the cold regeneration machine, so that the amount of liquid stabilizer added changes with the operation of the cold regeneration machine.