This type of roller consists of a large steel drum in front and two wheels on the rear end. The weight of the roller can be increased by filling the inside space of the drum with water or wet sand. This is called ballasting.
Smooth wheel rollers are most suitable for consolidating stone soling, gravel, sand, hard core, ballast and surface dressings. Not suitable for consolidating embankments and soft sub-grades, but are better suited than any other plant for compacting silty and sandy soils and with fewer passes. When the moisture content is a little more than optimum it will compact more easily
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