Road roller belong to the category of road machinery and equipment in construction machinery and are widely used in high-grade highways.the filling and compaction operations of railways,airport runways,dams,stadiums and other large-scale engineering projects can roll sandy, semi-cohesive soils, roadbed stabilized soil and asphalt concrete pavement layers
Rolling skills
1. During operation, it should start before it starts to vibrate, and the engine should be set to medium speed first, and then adjusted to high speed.
2. When rolling downhill under very steep slopes, light should be used for pre-compaction first, and then heavy or vibratory rollers should be used for compaction.
3. Whether 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 wheel can withstand the driving force provided by the ramp and the machine itself, while the front wheel performs preliminary compaction on the road surface to withstand the greater shearing force generated by the driving wheel; When going downhill, the impact force generated by the weight of the roller 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.
Three steps to Compact the road
1. The role of initial pressure
The asphalt concrete is in a relatively soft state after the paving machine is finished. The initial pressure is carried out immediately after the paving is completed. The static pressure of the light steel wheel roller is used to give the asphalt concrete a preliminary position and preliminary density. Ensure that no displacement occurs during vibration rolling.
2. The role of recompression
After the initial pressure is completed, the re-compression can be carried out by using a large-tonnage steel-wheel vibratory roller or a rubber-wheel vibratory roller. The function of re-compression is to make the asphalt concrete pavement reach the required density, and the main function is to compact.
3. The effect of final pressure
Immediately after the recompression, the static pressure of the double-drum roller is used to eliminate the wheel tracks generated during the recompression, so that the smoothness of the asphalt pavement can meet the requirements.
The roll of initial pressure
The asphalt concrete is in a relatively soft state after the paving machine is finished. The initial pressure is carried out immediately after the paving is completed. The static pressure of the light steel wheel roller is used to give the asphalt concrete a preliminary position and preliminary density. Ensure that no displacement occurs during vibration rolling.
2. The role of recompression
After the initial pressure is completed, the recompression can be carried out by using a large-tonnage steel-wheel vibratory roller or a rubber-wheel vibratory roller. The function of recompression is to make the asphalt concrete pavement reach the required density, and the main function is to compact.
3. The effect of final pressure
Immediately after the re-compression, the static pressure of the double-drum roller is used to eliminate the wheel tracks generated during the re-compression, so that the smoothness of the asphalt pavement can meet the requirements.
Essential Skills and Competences
- drive mobile heavy construction equipment
- follow health and safety procedures in construction
- inspect construction sites
- keep heavy construction equipment in good condition
- operate GPS systems
- operate road roller
- prevent damage to utility infrastructure
- react to events in time-critical environments
- recognize the hazards of dangerous goods
- use safety equipment in construction
- work in a construction team
- Essential Knowledge
- compaction techniques
- mechanical systems
- mechanical tools
- Optional Skill and Competence
- follow safety procedures when working at heights
