There are several types of rollers used for compacting soil and materials in construction. The main types are smooth wheeled, vibrating smooth wheeled, sheepsfoot, pneumatic-tired, grid, tamping, and padded drum vibratory rollers. Smooth wheeled rollers compact using static weight or vibration and come in single or dual drum models. Sheepsfoot rollers are used for compacting clay-based soils using foot contact pressure. Pneumatic rollers are effective on coarse-grained soils and their weight can be increased with ballasting. Grid rollers provide high contact pressure while tamping rollers can break up clumps at high speeds.

1. ROLLERS
By: AMAN KUMAR SINGH

2. INTRODUCTION
A road roller (sometimes called a roller-
compactor) is a compactor type
engineering vehicle used to compact soil,
gravel, concrete, or asphalt in the
construction of roads and foundations.

3. TYPES OF ROLLERS
 Smooth Wheeled Rollers
Smooth wheeled rollers are of two types:
1. Static smooth wheeled rollers
2. Vibrating smooth wheeled rollers
 Sheepsfoot Rollers
 Pneumatic-Tired Rollers
 Grid Rollers
 Tamping Rollers
 Padded drum vibratory rollers

4. SMOOTH WHEELED ROLLERS
1. STATIC SMOOTH WHEELED ROLLERS
 The smooth wheeled rollers consists of one large steel
drum in front and two steel drums on the rear.
 The gross weight of these rollers is in the range of 8-
10 tonnes(18000 to 22000 lbs).

5. SMOOTH WHEELED ROLLERS
2. VIBRATING SMOOTH WHEELED
 It comes in two models single or dual drum models.
 The drums are made to vibrate by employing rotating or
reciprocating mass which generate three compactive forces:
1)pressure,2)impact,3)viberation .

6. SHEEPSFOOT ROLLERS
 Sheepsfoot rollers are used for compacting fine grained
soils such as heavy clays and silty clays.
 The weight of drums can be increased by the use of ballast
in the drum which varies the foot contact pressure.

7. PNEUMATIC-TIRED ROLLERS
 Pneumatic tired rollers are also called as rubber tired rollers. These
rollers are used for compaction of coarse grained soils with some
fines.
 The total weight of the roller can be increased from 11.0 tonnes to
25.0 tonnes or more by ballasting with steel sections or other means.

8. GRID ROLLERS
 These rollers have a cylindrical heavy steel surface consisting
of a network of steel bars forming a grid with squire holes.
 Typical weights vary between 5.5 tonnes net and 15 tonnes
ballasted. Grid rollers provide high contact pressure but little
kneading action and are suitable for compacting most coarse
grained soils.

9. TAMPING ROLLERS
 These rollers operate at high speeds, and are capable to breaking
large lumps. These rollers also consists of leveling blades to spread
the material.
 These rollers are similar to sheepsfoot rollers with lugs of larger area
than sheepsfoot rollers. The degree of compaction achieved is more
than sheepsfoot rollers.

10. PADDED DRUM VIBRATORY
ROLLERS
 These rollers are effective
on soils.
 The edges of the pads are
rolled inward enabling
them to walk out of the lift
without fluffing the soil.

11. THANK YOU