Carry out compaction along the longitudinal direction of the line, and follow the principle of "light first and then heavy, first slow and then fast, first edge and then center (curve sections are first inner, then outer)" when rolling. Adopt the method of static pressure 1 time + strong vibration 3-4 times + weak vibration 2 times + static pressure 1 time, and the walking speed is controlled within 4km/h. The specific method is as follows:
1. The compacted road surface should start from the edges on both sides of the road, and gradually move to the center of the road. The two rolling belts must have a certain overlapping width. The overlapping width of the tandem roller and the single-wheel vibratory roller should be 250-300mm, and the overlapping width of the static three-wheel roller can be half of the main roller.
2. The temperature for starting impact rolling[/url] is between 80-150°C for petroleum asphalt (90-110°C for residual oil asphalt). If the rolling temperature is too high, the material will be squeezed in front of the rollers and appear Expansion along the edge of the roller produces transverse cracks and adhesion to the roller. When the rolling temperature is too low, the viscosity of the asphalt becomes high, making it difficult to compact, and cracks will appear on the rolled road surface.
3. The road roller should be as close as possible to the paver for rolling, and the pressure should be light first and then heavy, so as to ensure that the compactness requirements are met before the mixture cools below the required minimum temperature.
4. When rolling the newly paved asphalt mixture, the operator should first drive the driving wheel into the fresh mixture field to reduce ripples and fractures.
5. Keep the impact rolling speed constant, do not stop on the surface of the hot material randomly; turn or start slowly, so that the indentation can be minimized.
