就地冷再生技术是在常温下使用冷再生专用机械连续完成铣刨和破碎旧路面结构层（包括面层和部分基层）、添加再生材料、拌和、摊铺、碾压等作业过程，重新形成具有一定承载能力的结构层。就地冷再生技术施工中使用的骨料主要有铣刨下来的旧沥青面层材料、旧基层材料、新添加碎石等。冷再生机租赁厂家为您讲解：

The local cold recycling technology is to use the special cold recycling machinery to continuously complete the process of milling and crushing the old pavement structural layer (including the surface layer and part of the base layer), adding recycled materials, mixing, paving, rolling and other operations under the normal temperature, and re-form the structural layer with a certain bearing capacity. The aggregates used in the construction of local cold recycling technology mainly include milled old asphalt surface material, old base material, newly added gravel, etc. The cold regeneration machine rental manufacturer explains to you:

由于骨料中包含沥青碎屑以及裹覆沥青膜的矿料，因而成型的冷再生结构层与水泥稳定碎石等半刚性基层强度特性略有不同。冷再生基层的回弹变形比水泥稳定碎石和沥青砼都要大，处于半刚性和柔性基层之间，既有半刚性基层的板体强度，又有柔性基层的抗变形能力，同时可以减少温缩、干缩裂缝。

Because the aggregate contains asphalt chips and mineral aggregate coated with asphalt film, the strength characteristics of formed cold recycled structural layer are slightly different from that of semi-rigid base such as cement stabilized crushed stone. The rebound deformation of cold recycled base is larger than that of cement stabilized macadam and asphalt concrete. It is between semi-rigid base and flexible base. It has both the strength of slab of semi-rigid base and the anti-deformation ability of flexible base, and can reduce temperature shrinkage and dry shrinkage cracks.

就地冷再生技术施工工艺简单，缩短工期，，尤其适应于普通干线公路养护维修工程的施工，应用前景非常广阔。

The local cold regeneration technology has simple construction process, short construction period, energy conservation and environmental protection. It is especially suitable for the construction of maintenance and repair works of ordinary trunk highways, and has a broad application prospect.

随着使用年限增加，以及交通量急剧增加、大吨位车辆增多，导致局部路段路基翻浆、变形，路面沉陷、坑槽、雍包、松散、龟裂破坏。

With the increase of the service life, the sharp increase of traffic volume and the increase of large-tonnage vehicles, the subgrade of local sections is subject to frost boiling and deformation, and the pavement is subject to subsidence, pits, cracks, looseness and cracking.

对路基病害进行处理，然后重铺路面结构层，其结构形式为：3.5㎝厚AC-13沥青混凝土上面层+5cm厚AM-16热再生沥青碎石混合料下面层+20㎝厚5%水泥稳定碎石基层+15cm厚4.5%水泥稳定就地冷再生底基层。

The subgrade disease shall be treated, and then the pavement structural layer shall be resurfaced. Its structural form is: 3.5 cm thick AC-13 asphalt concrete upper layer+5 cm thick AM-16 hot recycled asphalt macadam mixture lower layer+20 cm thick 5% cement stabilized macadam base+15 cm thick 4.5% cement stabilized local cold recycled subbase.

材料要求

Material requirements

水泥稳定就地冷再生底基层的水泥宜采用标号32.5的普通硅酸盐水泥，水泥初凝时间应大于3h，终凝时间应大于6h且小于10h。

Ordinary Portland cement with grade 32.5 should be used as the cement for cement stabilized local cold regeneration subbase. The initial setting time of cement should be more than 3h, and the final setting time should be more than 6h and less than 10h.

冷再生用水应为可饮用水，使用非饮用水应经过试验验证，不影响产品和工程质量时方可使用。

The cold regeneration water shall be potable water, and the use of non-potable water shall be tested and verified, and can be used only when it does not affect the product and project quality.

就地冷再生经对原路铣刨取样试验，能够达到《公路路面基层施工技术细则》要求，对铣刨料做液塑限试验，其液限为32%，塑限为26%，塑性指数为6%，符合规范要求，因此对再生料级配按表一的级配控制。局部地段若级配不符合下表要求，可添加级配砾石或碎石调整。

The local cold recycling can meet the requirements of the Technical Rules for Construction of Highway Pavement Base Course after the sampling test of the original road milling. The liquid-plastic limit test of the milling material is 32%, the plastic limit is 26%, and the plastic index is 6%, which conforms to the specification requirements. Therefore, the grading of the recycled material is controlled according to the grading in Table 1. If the grading of local sections does not meet the requirements of the following table, graded gravel or crushed stone can be added for adjustment.

就地冷再生技术在工程中的设计方案相关内容就到这里了，您有什么事项就来我们网站咨询吧！

This is the relevant content of the design scheme of the in-place cold regeneration technology in the project. If you have any questions, please come to our website Ask!