Compacting asphalt pavement with a road roller is a crucial part of road construction projects, as the success of the compaction process significantly influences the overall project timeline.

We understand that there are two main factors affecting the compaction and smoothness of the asphalt concrete structural layer: compaction temperature and compaction method.

The compaction temperature is managed by on-site personnel specialized in testing temperature, who direct the timing and location of the rolling.

Key Points of Compaction Method

1. 1. Follow the principle of top-down, static-then-vibration, slow-to-fast approach. Aim for longer single-pass rolling distances to maximize the stability of the rolling force.

2. 2. The road roller should closely follow the paver to ensure control over the temperature conditions. Avoid excess vibration by stopping operations immediately after all track marks are eliminated and required standards are met.

3. 3. Track elimination can be achieved through overlapping rolling. During rolling, overlap the adjacent rolling bands by 1/3 to 1/2 of the wheel width, gradually moving from the lower to the higher side of the cross-section. Each return of the roller counts as one pass.

4. 4. If the roller is not on the same section as the paver and instead forms a stepped pattern, adjust the distance during each roll, typically by half a meter. Start with longer distances on the initial passes and gradually shorten them.

5. 5. Monitor the water spray nozzles of the roller to ensure it doesn't stick to the wheels. Do not turn, brake, or stop during rolling unless it's an emergency.

Specific Rolling Steps

1. 1. Initial Rolling

2. The temperature for initial rolling should be above 150°C. Start the machine and use a steel wheel roller for 1-2 static passes at a speed under 2 km/h, maintaining quickness. On flat surfaces, keep the drive wheel facing the paver and the idle wheel at the back. On slopes, whether uphill or downhill, the drive wheel should be at the lower end.

3. 2. Intermediate Rolling

4. After the initial rolling, proceed to intermediate rolling when the pavement temperature is not below 125°C. First, use a heavy double steel wheel roller for 4 vibratory passes at 4-5 km/h, followed by a heavy tire roller for 6 passes at 3.5-4.5 km/h. Depending on the results, 1-2 additional passes may be necessary.

5. 3. Final Rolling

6. Immediately after intermediate rolling, perform the final rolling when the pavement temperature is above 110°C. Turn off vibration and proceed with static rolling at a speed of 2-3 km/h.