A. Types of roller compactors available
There are three main types of roller compactors are available on the market; vibratory rollers, sheep foot rollers, pneumatic rollers. The choice of a compactor should be guided by project requirements. Vibratory rollers are equipped with vibration mechanisms that enhance compaction. The sheep foot roller has pads on the drum; the pads reduce the force to area ration increasing compaction. Pneumatic rollers are equipped with air-filled rubber tires instead of a drum. They are used to provide a smooth finish to surfaces such as asphalt road paving.
B. Weight and size considerations based on project requirements
The weight and size of roller drums affect the generated compaction force. A heavier and wider drum should be used in projects that require higher degrees of compaction over large areas. Lighter compactors require more passes to deliver higher compaction; thus, they are uneconomical for such projects.
C. Engine power and compaction force
The engine is responsible for pulling or pushing the drum over material. Bigger engines are needed for compactors with wide and heavy drums. The weight of the drum determines the compaction force generated. Therefore, the engine size has an impact on the compaction force generated.
D. Drum width and diameter for effective compaction
The size of the drum determines the number of passes needed for effective compaction. Smaller drums require a higher number of passes; this makes them uneconomical and time consuming for projects that require higher degree of compaction over large areas.
E. Maneuverability and ease of operation
Ease of operation refers to how complex the roller compactor controls are. Simple compactors require less skills, therefore, lesser is spent on training and paying operators. Maneuverability refers to how easy it is to move the roller within spaces. Maneuverability determines the terrain and space within which a roller can operate effectively.
F. Vibration frequency and amplitude
This consideration applies to vibratory rollers. Vibration frequency and amplitude determines the compaction effect generated by the roller. Amplitude determines the impact on the material while frequency determines the intervals at which the impact is applied.
G. Drum surface material and quality
Drum surface determines the quality of finish one gets in a compaction process. Smooth steel drums are heavy and provide a consistent and smooth surface. In landfill management, the drum is coated by corrosion resistant material to withstand waste toxicity.