What is the difference in speed when Road Roller compacts different materials?

1. When compacting soil
Non-cohesive soil: For non-cohesive soils such as sand and gravel, the speed of Road Roller can be relatively fast. Generally, it can be controlled at about 4-6 kilometers per hour. This is because the friction between non-cohesive soil particles is small and easy to compact. Faster speed can improve work efficiency and will not have much impact on the compaction effect.
Cohesive soil
For cohesive soils such as clay and silty clay, the speed of Road Roller should be relatively slow. Usually around 2-4 kilometers per hour. The friction between cohesive soil particles is large, and compaction is more difficult, requiring more time and pressure to rearrange the particles.
If the speed is too fast, the air and moisture in the soil are difficult to discharge, and it is easy to form a "spring" phenomenon, that is, the soil rebounds after compaction, and a good compaction effect cannot be achieved.
2. When compacting sand and gravel
Crushed stone: When compacting crushed stone, the speed of Road Roller is generally controlled at 3-5 kilometers per hour. The gravel particles are large, and a certain impact force and pressure are required to make them closely arranged. A faster speed can increase the impact force of the vibrating wheel on the gravel, but the speed should not be too fast to prevent the gravel from being crushed or splashing, affecting the construction safety and compaction quality. During the compaction process, attention should be paid to the use of layered compaction methods, and the thickness of each layer should not be too large to ensure uniform compaction.
Gravel: For gravel materials, the speed of the Road Roller can be slightly faster than compacting clay soil, but slower than compacting non-clay soil. About 3-4 kilometers per hour. The particle size of gravel is between sand and gravel, and the compaction difficulty is also between the two. It is also necessary to pay attention to layered compaction, and during the compaction process, ensure that the gradation of gravel is good to avoid segregation.
3. When compacting asphalt mixture
Asphalt pavement: When compacting asphalt mixture, the speed of the Road Roller should be very slow. Generally about 2-3 kilometers per hour. Asphalt mixture has a certain viscosity at high temperature, and too fast speed will cause quality problems such as shifting and cracking on the road surface. At the same time, pay attention to controlling the temperature during the compaction process to ensure that the asphalt mixture is compacted within the appropriate temperature range to obtain the best compaction effect.
In short, when compacting different materials, the Road Roller should reasonably adjust the driving speed according to the characteristics of the materials and compaction requirements to ensure compaction quality and construction efficiency. If you are deeply interested in Road Roller, MR HIPPO MACHINARY will provide you with comprehensive services and support to ensure the smooth progress of your project.