This document discusses types of rollers used for compaction. It describes the key parts of a roller including the rolling drum for compaction, engine for power, wheels for movement, and driving cab. There are different types of roller drums including single drum on hand-propelled rollers, duplex rollers with two drums, and drums that can be filled with water. Rollers are used to compact soil, gravel, concrete and asphalt in construction and at landfills, and can range in size from 100-pound hand rollers to 20-ton road rollers costing over $150,000. Field densities are determined using tools like sand cones and nuclear density gauges.

2.  Presenting to : Engrismail
 Prepared by : Kaleemafzal khan
 roll no : 43
 section : b
 Dept : civil engineering uet peshawar

3. Rollers
Types
Uses of rollers
compaction
Rollers and roller compaction:
contents:

4. A roadroller (sometimes called a roller compactor, or just roller) is a compactor type
engineering vehicle used for
compaction (tightening of material in the
required density).
following are different parts of a common
Roller:
rollers:

6. Rolling Drum:
Roller drum is used for compaction purpose
Engine:
it provide nesessory power for operation
Wheels:
Used for moving to other place.
Hydraulic Steering:
Is used for changing direction.
head Lights: used for lightening in dark

7. Driving cab: operators set here to operate
Indicators: for indicating changing direction.
 DrumVariations:
Human-propelled rollers may only have a
single roller drum.
 Self-propelled rollers may have two drums,
mounted one in front of the other (format
known as "duplex").
 On some machines, the drums may be filled
with water on site to achieve the desired
weight.

8. One steel drum in Front and Two steel drum in Rear

9. Many solid round or rectangular feet attached to steel drum
Suitable for compacting heavy clays and silty clays

10. • 4 pneumatic smooth wheels on the Front axle whereas 5
wheels on the Rear axle to exert uniform pressure

11. • Similar to smooth wheel rollers with the modification of rotating drums
• Very expansive but have high output and performance

12. A cylindrical heavy steel surface consisting of a network of steel bars
forming a grid with squire holes

14.  Rollers are mainly used for compacting soil gravel, concrete, or asphalt in
the construction of roads and foundations
 Rollers are used also at landfills sites or in
agriculture.

15.  The roller can be a simple drum with a handle
that is operated by one person, and weighs
100 pounds.
 or as large as a ride-on road roller weighing
20 tons) and costing more than US $150,000.
 A landfill unit can weigh 54 tons.
 On some machines the drums may be filled
with water.

16.  Field densities are determined by:
• Sand Cone
• Nuclear Density Gauge
required compaction:

17. ---End of Presentation---