Rules and Tips For Road Compaction

Rules and Tips For Road Compaction

Operating rules for rollers

1. During operation, the road roller should start before it starts to vibrate. The internal combustion engine should be set to medium speed first, and then adjusted to high speed.

2. The engine should be stopped first when shifting and reversing, and the speed of the internal combustion engine should be reduced when shifting.  

3. It is strictly forbidden for the roller to vibrate on solid ground.  

4. When rolling a soft roadbed, you should first roll it 1 to 2 times without vibration, and then vibrate it.  

5. When rolling, the vibration frequency should be consistent. For the vibratory roller that can be adjusted, the vibration frequency should be adjusted first before the operation, and the vibration frequency should not be adjusted without shaking.

6. The adjustment of the reversing clutch, shock clutch, and brake should be carried out after the main clutch is disengaged. 

7. When going up or downhill, fast gears are not allowed. In sharp turns, including articulated vibratory rollers when rolling in small turns, it is strictly forbidden to use fast gears.

8. The roller shall not engage with vibration when it is running at high speed.

9. When stopping, stop the vibration first, then put the reversing mechanism in the middle position, put the transmission in neutral, and finally pull up the hand brake lever, and the internal combustion engine will turn off after idling for a few minutes.

10. Other operating requirements should meet the requirements of static pressure rollers.

Roller rolling skills  

① Regardless of whether it is uphill or downhill, the bottom layer of the asphalt mixture must be clean and dry, and the asphalt bonding layer must be sprayed to avoid slippage of the mixture during rolling.

②Whether it is rolling uphill or rolling downhill, the driving wheel of the roller should be behind. This has the following advantages: when going uphill, the rear driving wheels can withstand the driving force provided by the ramp and the machine itself, while the front wheels perform preliminary compaction on the road surface to withstand the greater shearing force generated by the driving wheels; When going downhill, the impact force generated by the roller’s own weight is offset by the braking of the driving wheel, and only the mixture after being rolled by the front wheel can support the rear driving wheel to generate shearing force.

③When rolling uphill, the roller should start, stop and accelerate smoothly to avoid excessively high or low speed.

④Before uphill rolling, the mixture should be cooled to the specified lower limit temperature, and then statically pre-compressed. When the temperature of the mixture drops to the lower limit (120°C), vibration compaction should be used.

⑤Sudden speed change and braking should be avoided when rolling downhill.

⑥When rolling downhill under very steep slopes, light rollers should be used for pre-compaction first, and then heavy rollers or vibratory rollers should be used for compaction.

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