The width of the cold regeneration machine for crushing and mixing is 2.4 meters. During operation, a water tank truck should closely follow the operation to ensure the mixing water. During the mixing process, the water should be controlled according to the 1-2% higher than the optimal water content specified in the test sheet (provided that the regeneration machine needs to open several water nozzles to convert the water content). Another water tank truck needs to be full of water and always on standby. Once the water tank working with the regeneration machine runs out of water, it needs to be immediately replenished. To ensure the continuous operation ability of cold revitalization. The travel speed of the cold recycling machine should be adjusted based on the damage condition of the road surface and the depth of regeneration, generally ranging from 6m/min to 12m/min, so that the fluctuation range of the material grading after milling is not large. In areas with severe mesh cracks, the travel speed of the regeneration unit should be reduced and the speed of the milling rotor should be increased. If the thickness of the structural layer of the old road surface is greater than 8cm and it is difficult for the cold recycling machine to move, it is necessary to first mill and plane the old road surface layer with the cold recycling machine, and then lay cement on the crushed material for cold recycling mixing construction. During the cold regeneration process, personnel are required to follow and check the mixing depth and humidity at any time, usually around 20 meters. If there are any nonconformities, they should be reported to the driver in a timely manner for resolution. During each cold recycling construction operation, the vibrating roller must follow the cold recycling machine at a distance of 20m behind it. The mixed mixture should be promptly compacted with high amplitude and low frequency vibration, with a speed equivalent to the driving speed of the cold recycling machine. The purpose is to seal the water in the mixture when the water content is optimal.

再生施工时应考虑两种接缝：与道路中心线平行的纵向接缝和与道路中心线垂直的横向接缝。

Two types of joints should be considered during regeneration construction: longitudinal joints parallel to the road centerline and transverse joints perpendicular to the road centerline.

纵向接缝：再生机的工作宽度一般小于道路或行车道的宽度，因此，全幅路的冷再生需多次作业，从而导致和相邻作业面间的纵向接缝。需要沿整条纵缝有一定的重叠量以保证相邻作业面间纵缝的连续性。相邻作业面间的重叠量不小于10cm。路面越厚，重叠量越大；材料粒径越粗，重叠量越大；相邻两次作业间隔12h以上时，重叠量应增加。在纵向接缝上，根据已建再生层的完成时间，改变水的喷入量。纵向接缝的位置应尽量避开缓慢行驶的重型车辆的轮迹。施工时应通过在现有路面上醒目标志或测量基准线的方法建立导向提示，帮助驾驶员正确操纵再生机，避免相邻作业面间存在未拌合的的夹生带。

Longitudinal joint: The working width of the recycling machine is generally smaller than the width of the road or carriageway, therefore, the cold recycling of the full width road requires multiple operations, resulting in longitudinal joints between adjacent working surfaces. It is necessary to have a certain amount of overlap along the entire longitudinal seam to ensure the continuity of the longitudinal seam between adjacent working surfaces. The overlap between adjacent work surfaces shall not be less than 10cm. The thicker the road surface, the greater the overlap; The coarser the material particle size, the greater the overlap; When the interval between two adjacent assignments is more than 12 hours, the overlap should be increased. On the longitudinal joint, change the amount of water sprayed according to the completion time of the existing regeneration layer. The position of the longitudinal joint should avoid the wheel tracks of slow moving heavy vehicles as much as possible. During construction, guidance prompts should be established by prominently marking or measuring reference lines on the existing road surface to help drivers operate the recycling machine correctly and avoid unmixed entrainment between adjacent working surfaces.

横向接缝：因每次施工开始或终止而形成的横向接缝是不连续的。每次停机，即使是仅需几分钟用于更换罐车、刀头，也将形成一个严重影响再生材料均匀性的横缝。因此施工中尽量减少停机现象，在不可避免的情况下，应对所形成的横缝进行重叠认真处理。处理横向接缝时需要注意含水量，一般起刀落刀时含水量按正常减半。再生施工开始时，所有开始步骤必须严格依次进行，特别是水管的排气程序。所有气体必须在水到达喷洒杆前排除，如果排气不当，有可能在再生施工开始的初几米内，混合料内无水，从而导致路面内出现非稳定路段。在临时停机后重新开始时，整个再生机组应该后退少一个转子直径的距离既1.5-2米到达再生过的材料上。这将保证开始施工后所有材料均得到处理。停机超过水泥初凝时间，再生机再次施工时，必须将整个再生机后退再生过的路段1.5m的距离，并重新撒布水泥。横缝问题只有当施工停止时才会出现。因此，再生机组好只能在罐车用空后或类似情况下才能停机。施工中尽量减少停机现象，好在每打完一段整幅路后再更换刀头，以不影响后续工序的展开。

Transverse joint: The transverse joint formed by the start or end of each construction is discontinuous. Each shutdown, even if it only takes a few minutes to replace the tanker and blade, will form a serious transverse seam that affects the uniformity of the recycled material. Therefore, during construction, the phenomenon of downtime should be minimized as much as possible. In unavoidable cases, the horizontal joints formed should be carefully overlapped and treated. When handling transverse joints, it is necessary to pay attention to the water content. Generally, the water content should be reduced by half when starting and falling the knife. At the beginning of regeneration construction, all starting steps must be strictly followed in sequence, especially the exhaust procedure of the water pipe. All gases must be expelled before the water reaches the spray bar. If the exhaust is not done properly, there may be no water in the mixture within the first few meters of regeneration construction, leading to unstable road sections on the road surface. When restarting after a temporary shutdown, the entire regeneration unit should retreat at least one rotor diameter distance of 1.5-2 meters to reach the regenerated material. This will ensure that all materials are processed after the start of construction. If the shutdown exceeds the initial setting time of the cement, and the regeneration machine is being constructed again, the entire regeneration machine must be retreated to a distance of 1.5m from the regenerated road section and the cement must be re spread. The problem of transverse joints only occurs when construction stops. Therefore, the regeneration unit can only be stopped after the tank truck is empty or in similar situations. During construction, minimize downtime as much as possible, and preferably replace the cutting head after completing each section of the entire road to avoid affecting the subsequent process.

再生拌和均匀后应色泽一致，没有灰条、灰团和花面，即无明显粗细料离析现象，且水分合适、均匀。每天冷再生施工结束时清洗刀头一定要远离当日施工段的路面进行，以防止洗刀水流入刚打完的路面结构中造成人为软基。

After the regeneration and mixing are uniform, the color should be consistent, without gray bars, clusters, or flower surfaces, that is, there should be no obvious segregation of coarse and fine materials, and the moisture should be appropriate and uniform. At the end of cold recycling construction every day, the cleaning of the blade must be carried out far away from the road surface of the construction section on that day to prevent the water flow of the blade from entering the newly completed road structure and creating a soft foundation.