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Which roller is most suitable for the compaction of a gravelly sand mixture with 25% fines?
- a)Smooth-wheeled roller
- b)Sheepsfoot roller
- c)Vibrating roller
- d)Heavy roller
Correct answer is option 'A'. Can you explain this answer?
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Which roller is most suitable for the compaction of a gravelly sand mi...
Smooth-wheeled roller
- A smooth-wheeled roller is most suitable for the compaction of a gravelly sand mixture with 25% fines.
- This roller is also known as a static roller or a static smooth drum roller.
- It is typically used for compacting cohesive soils and fine-grained materials, but it can also be effective for compaction of gravelly sand mixtures with fines.
- The smooth drum surface of the roller provides uniform compaction and smooth finish to the surface.
- The weight of the roller and the static compaction force exerted by the smooth drum are effective in compacting the fines in the gravelly sand mixture.
- The smooth drum roller is efficient in achieving a high degree of compaction in a shorter time compared to other types of rollers.
- It can be used for both initial and finish compaction of the gravelly sand mixture.
- The smooth drum roller is suitable for compaction of thin layers of the mixture as well as deeper layers.
- It is important to note that the smooth-wheeled roller may not be as effective for compaction of coarser materials or heavily graded mixtures with larger particles.
- In such cases, other types of rollers like sheepsfoot roller, vibrating roller, or heavy roller may provide better compaction results.
In summary, the smooth-wheeled roller is the most suitable option for the compaction of a gravelly sand mixture with 25% fines due to its ability to provide uniform compaction and achieve a high degree of compaction in a shorter time.
- A smooth-wheeled roller is most suitable for the compaction of a gravelly sand mixture with 25% fines.
- This roller is also known as a static roller or a static smooth drum roller.
- It is typically used for compacting cohesive soils and fine-grained materials, but it can also be effective for compaction of gravelly sand mixtures with fines.
- The smooth drum surface of the roller provides uniform compaction and smooth finish to the surface.
- The weight of the roller and the static compaction force exerted by the smooth drum are effective in compacting the fines in the gravelly sand mixture.
- The smooth drum roller is efficient in achieving a high degree of compaction in a shorter time compared to other types of rollers.
- It can be used for both initial and finish compaction of the gravelly sand mixture.
- The smooth drum roller is suitable for compaction of thin layers of the mixture as well as deeper layers.
- It is important to note that the smooth-wheeled roller may not be as effective for compaction of coarser materials or heavily graded mixtures with larger particles.
- In such cases, other types of rollers like sheepsfoot roller, vibrating roller, or heavy roller may provide better compaction results.
In summary, the smooth-wheeled roller is the most suitable option for the compaction of a gravelly sand mixture with 25% fines due to its ability to provide uniform compaction and achieve a high degree of compaction in a shorter time.
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Which roller is most suitable for the compaction of a gravelly sand mi...
Smooth-Wheeled Roller:
- A smooth wheel roller generally consists of three wheels one small wheel at the front and two large wheels at the rear.
- Smooth wheel rollers are useful for finishing operations after the compaction of fills and for compacting the granular base course of the highway.
- These are not effective for compacting deep layers of soils as the resulting compaction pressure is low and also cause stratification in deep layers due to nonuniform compaction.
- It is used to compact soil having gravel, sand, crushed rock, etc.
- These roller compact the soil by the Pressure action.
Sheepfoot Roller:
- It consists of hollow drums with large numbers of small projections (known as feet) on its surface.
- The projections penetrate the soil layers during rolling operation and cause compaction.
- The sheep-foot rollers are ideally suited for the compaction of cohesive soils and these roller compact the soil by the combination of temping and kneading action.
Vibrating Roller:
- In the case of vibratory rollers, vibrators are mounted on the drum and these rollers are available both as pneumatic type and smooth wheel type.
- These rollers are suitable for granular soil with no fines in layers up to 1 m thick, however, if there is an appreciable percentage of fines, the thickness has to be reduced.
Heavy Roller:
- Heavy rollers are suitable for compacting soil or clay, hardcore and gravel on smaller sites where a high level of compaction is still required.
- Rubber-tired wheels at the rear allow these machines to climb steep gradients and provide traction in clay and soil conditions.
- These heavy rollers provide considerably more compaction than smaller tandem rollers and their width allows large areas to be covered quickly.
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Which roller is most suitable for the compaction of a gravelly sand mixture with 25% fines?a)Smooth-wheeled rollerb)Sheepsfoot rollerc)Vibrating rollerd)Heavy rollerCorrect answer is option 'A'. Can you explain this answer?
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