Here you will find about pavement, components of pavement, types of pavement, flexible pavement, rigid pavement, and compression between flexible and rigid pavement.

2. Meer Chakar Khan Rind University of Technology DG khan
Faculty of Civil Engineering and Technology
Transportation Engineering
Submitted To
Respected Sir Akbar Rafique Sb
Designation
Lecturer
Presentation Topic
Pavement
Submitted By
Student Name Reg. No
Saleem Abbas 2020-MCUT-021
Ghulam Hussain 2020-MCUT-025
Abdullah Saleem 2020-MCUT-006
M. Ibrahim Mudasir 2020-MCUT-011
Allah Bakhash 2020-MCUT-030

3. Pavement is the top layer of the road. Pavement is a medium which
transfer the traffic load via tire to the soil. pavement, is the
durable surface material laid down on an area intended to sustain
vehicular or foot traffic, such as a road or walkway. The pavement
structure is a combination of subbase, base course, and surface course
placed on a subgrade to support the traffic load and distribute it to the
road bed. The expected lifespan of an asphalt pavement depends on
many factors, including the quality of installation, climate, type of
materials, proper maintenance, and more. With the right care and use,
your asphalt pavement can last up to 25 years and beyond.

5. Pavement of the surface depend on the type of pavement. The
important surface characteristics of pavement are :
 Friction
 Light Reflecting Characteristics
 Unevenness Surface
 Drainage of Water
 Smoothness
 Good Grip for Tire

6. Basic components of pavement are given below:
 Subgrade
 Base and Sub base
 Pavement
 Pavement Edge
 Pavement Joint

8. Sub Grade:
A subgrade is made up of native soil that has been compacted to
withstand the loads above it. It is a layer required in many structures
such as pavements and slabs, although it needs to have certain
characteristics. It has multiple properties .Some properties are given
below:
 Stability.
 Incompressibility.
 Permanency of strength.
 Minimum changes in volume and stability under adverse conditions
of weather and ground water.
 Good drainage, and.
 Ease of compaction

9. Sub Base:
A subbase is a layer of gravel or soil that comes over the subgrade.
Over the subbase comes the base course layer. The sub-base is the
main load-bearing layer of paving construction. A well-designed sub-
base should evenly spread the load of traffic, whether pedestrian or
vehicular, down to the sub-grade, also known as the formation level.
Sub-base material is produced by crushing either limestone or granite
rock.
Base:
The base course or base course in pavements is a layer of material in
an asphalt roadway, race track, riding arena, or sporting field. It is
located under the surface layer consisting of the wearing course and
sometimes an extra binder course. The base course provides the
strength of the pavement and typically has an aggregate top size of 3/4
to 1 inch.

10. Asphalt:
Asphalt is top layer the of pavement. It is the mixture of aggregate,
binder and filler material, used for constructing and maintaining roads,
parking areas, railway tracks, ports, airport runways, bicycle lanes,
sidewalks and also play- and sport areas. Asphalt pavement provides a
smoother surface. A smooth surface reduces damage to the pavement,
necessitating fewer repairs. It improves fuel efficiency and reduces
wear and tear on vehicles, making the choice for asphalt a great
economical decision.

11. Pavement has two types which are given below:
 Flexible Pavement
 Rigid Pavement

12. Flexible Pavements are constructed from bituminous or unbound
material and the stress is transmitted to the sub-grade through the
lateral distribution of the applied load with depth. A flexible pavement
structure is generally composed of several layers of materials which
can accommodate this “flexing”. The repair and maintenance of
flexible pavement is easy and cost effective.

14. Rigid pavement is the technical term for any road surface made of
concrete. Concrete roads are called rigid while asphalt-covered roads
are flexible. These terms refer to the amount of deformation created in
the road surface itself when in use and over time.

16.  Have low flexural strength.  Have high flexural strength.
 Expansion joints are not needed.  Expansion joints are needed.
 Have low life span.  Have high life span.
 High Maintenance Cost.  Low maintenance cost.
 Road can be used for traffic within 24
hours.
 Road cannot be used until 14 days of
curing.
 Damaged by oils, water and Certain
Chemicals.
 No damage by oils, water and certain
chemical.
 Force of friction is low compare to rigid.  Force of friction is high.