I. Initial Compaction Stage
Speed Range: 8-10 km/h (impact roller) or 1.5-2 km/h (steel wheel static roller)
Function: To break down the soil structure resistance, create a smooth working surface, and prevent material displacement.
Temperature Requirement: The initial compaction temperature of asphalt pavement must be >150℃.
II. Secondary Compaction Stage
Speed Range: 12-15 km/h (impact roller) or 4-5 km/h (vibratory roller)
Function: To increase density and form a stable framework; requires consideration of vibration frequency (40-50Hz) and amplitude (0.3-0.8mm).
Temperature Requirement: The secondary compaction temperature of asphalt should not be lower than 125℃.
III. Final Compaction Stage
Speed Range: 10-12 km/h (impact) or 2-3 km/h (static)
Function: Eliminates wheel tracks, seals surface pores, and ensures smoothness.
Temperature Requirements: Final asphalt compaction temperature must be ≥110℃.
IV. Special Working Condition Adjustments
Soil Differences: For cohesive soil, speed should be reduced to 10-12 km/h; for sandy soil, speed can be increased to 12-15 km/h.
Moisture Content: For excessively wet soil, speed should be reduced to 8-10 km/h and construction should be suspended.
Special Locations: Speed should be reduced by 50% and a 1-meter safety distance should be maintained near bridge abutments and structures.
