In recent years, with the rapid development of China's transportation industry, a large number of asphalt concrete roads have been built all over the country. After years of operation, many highways with low design level and poor bearing capacity have been damaged to varying degrees, which puts forward a new topic for highway maintenance. Combined with the practice of in-situ cold regeneration construction and engineering practice, this paper puts forward the summary and opinions of in-situ cold regeneration construction.

水泥就地冷再生主要解决沥青路面基层损坏问题，早在二十世纪就在欧洲和美国得到了广泛应用。主要是指充分利用现有的沥青路面材料（必要时，作为新的骨料），并按一定比例加入一定量的水泥和水。在自然温度下，材料通过特定的机器连续地铣削、破碎、混合、铺砌和压实，从而重建所需的性能。新基层(底基层)的工作过程质量。该技术以其低成本、率、高质量、高等优点吸引了业界的关注和青睐。然而，局部材料的原因不可避免地带来了一些缺陷。

Cement in situ cold recycling mainly solves the problem of asphalt pavement base damage, and has been widely used in Europe and the United States as early as the 20th century. It mainly refers to making full use of the existing asphalt pavement materials (as new aggregates if necessary) and adding a certain amount of cement and water in a certain proportion. At natural temperature, materials are continuously milled, crushed, mixed, paved and compacted by specific machines to rebuild the required properties. Work process quality of new base (subbase). This technology has attracted the attention and favor of the industry with its advantages of low cost, high efficiency, high quality and high environmental protection. However, the local material causes inevitably bring some defects.

此外，在常温下，只要不进行雨雪天气施工，使用的材料只有水泥和其他添加剂，减少外部搅拌和运输的影响，并为施工进度提供较大帮助。

In addition, at normal temperature, as long as the construction is not carried out in rainy and snowy weather, only cement and other additives are used to reduce the impact of external mixing and transportation and provide great help to the construction progress.

质量好，易于控制

Good quality and easy to control

水泥路面原位冷再生可根据旧路面材料在不同道路上的实际情况设计。选择不同的添加剂，配比准确。保证了再生材料的优良质量和施工质量。可以形成施工的厚实均匀的基座，从而保证维修后道路的使用周期。

The in-situ cold recycling of cement pavement can be designed according to the actual situation of old pavement materials on different roads. Different additives are selected and the ratio is accurate. The excellent quality and construction quality of recycled materials are guaranteed. It can form a thick and uniform base for construction, so as to ensure the service life of the road after maintenance.

此外，由于水泥原位再生完全是水泥添加剂，它可以通过旧路的厚度、密度和比来计算1M2水泥冷再生混合物所需的水泥用量，并计算每袋水泥的摊铺面积，然后划格按平方布水泥,控制方法简单,易于接受控制。

In addition, because the in-situ regeneration of cement is completely a cement additive, it can calculate the cement dosage required for 1m2 cement cold regeneration mixture through the thickness, density and ratio of the old road, calculate the paving area of each bag of cement, and then divide the cement according to square. The control method is simple and easy to accept control.

高

High environmental protection

路面冷再生机其就地冷再生施工采用传统的公路养护方法，沥青路面和基层材料的浪费很大，环境受到污染。同时，大量的新材料的获取也会造成资源和环境的破坏。采用水泥就地冷再生技术可以完全利用原材料来避免上述问题。它不仅节约了大量的投资，而且更有利于环境保护，因此被称为“绿色”施工技术。

The local cold recycling construction of pavement cold recycling machine adopts the traditional highway maintenance method, which wastes a lot of asphalt pavement and base course materials and pollutes the environment. At the same time, the acquisition of a large number of new materials will also cause damage to resources and environment. The above problems can be avoided by using the cement in-situ cold regeneration technology. It not only saves a lot of investment, but also is more conducive to environmental protection, so it is called "green" construction technology.