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.

优点

advantage

与传统的公路养护方法相比，水泥就地冷再生具有许多优点。

Compared with traditional highway maintenance methods, cement in situ cold recycling has many advantages.

成本低

Low cost

由于旧水泥在水泥冷再生中的应用，降低了路面养护过程中一些新材料的挖掘、运输、浪费和购置成本，大大降低了成本。与传统方法相比，道路水泥的成本可降低20%～40%，厚度越深，成本越高。水泥现场冷再生技术可以大大降低工程造价，与传统的养护方案形成鲜明的对比。

Due to the application of old cement in cement cold recycling, the excavation, transportation, waste and purchase cost of some new materials in the process of pavement maintenance are reduced, and the cost is greatly reduced. Compared with traditional methods, the cost of road cement can be reduced by 20% ~ 40%. The deeper the thickness, the higher the cost. The on-site cold recycling technology of cement can greatly reduce the project cost, which is in sharp contrast to the traditional maintenance scheme.

进度快、效率高

Fast progress and high efficiency

水泥就地冷再生的施工可以通过加、铣、断、混、摊、压来完成，从而简化了施工工序，缩短了施工工期。使用水泥现场冷再生机，每天可完成60009000M2的工作量。与传统的道路养护、运输、垃圾填埋（不到2000）相比，不可一日而语。

The construction of cement local cold regeneration can be completed by adding, milling, breaking, mixing, spreading and pressing, which simplifies the construction process and shortens the construction period. Using the cement on-site cold regenerator, the workload of 6000 square meters to 9000m2 can be completed every day. Compared with the traditional road maintenance, transportation and landfill (less than 2000 square meters), it can not be said in a day.

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.