How to deal with the seam problem caused by the closing of the cold regenerator during the operation of the cold regenerator?
Even if it takes only a few minutes to replace the tank car at each parking, it will seriously affect the uniformity of the recovered material at the entire joint. Therefore, the shutdown should be reduced as much as possible in the construction. In unavoidable cases, the formed transverse joints shall be carefully treated.
1. In case of restart after temporary shutdown, the whole regeneration unit shall be retreated 1.5-2 m to recycled materials to ensure that all materials are treated after start-up.
2. A 4-6m real-time road roller shall be reserved for one section, and the next section shall not be rolled.
3. When the cold regeneration starts to work after leasing, the rotor should be cut to the bottom of the regeneration layer to destroy the recycled material. When the forward speed is 0, the loose recycled materials are mixed unevenly. Therefore, the pit must be leveled after turning over manually.
After the regeneration layer is stable, the recycled material is basically in a stable state, but the wheel rail of the regenerator can not be completely eliminated. The track depth is about 0.5-1 cm.
After the two-stage regeneration is completed and all are stable, the grader is used for leveling. The purpose of the initial leveling is to eliminate the three rows of wheel tracks on the right side of the first and second blocks. The secondary leveling is mainly to evenly spread the recycled materials in front of the scraper, and consider the horizontal and vertical slope of the recycled layer. Then the whole operation section is leveled.
The working width of the regenerator is generally smaller than that of the recycled pavement. Therefore, the regeneration of the entire road requires multiple operations, resulting in longitudinal joints between several adjacent working faces.
Generally speaking, the small overlap between adjacent working faces is 10cm to ensure the continuity of recycled materials at the longitudinal joints, and to avoid the entrainment between adjacent working faces that are not recycled.