The document discusses an introduction to pavement design concepts presented by several students. It defines pavement as the structure separating vehicle tires from the underlying foundation material. It describes the main types of pavement as flexible, rigid, and composite. Flexible pavements use bituminous or unbound materials and distribute stress through the subgrade. Rigid pavements transmit stress through a beam/slab effect using sufficient strength. Composite pavements have asphalt overlays on concrete. The principles of pavement design aim to develop an economical combination of layers to suit the soil and traffic loads over the design life, with upper layers protecting lower ones and stresses decreasing with depth.

1. R.P.B.M.
JIAGANJ COLLEGE
OF
ENGINEERING & TECHNOLOGY
JIAGANJ , MURSHIDABAD
(APPROVED BY AICTE & AFFILATED TO W.B.S.C.T.E)

2. PAVEMENTDESIGN
PRESENTEDBY
RANAJIT DAS (38)
SOUNIT KAR (31)
JOYDEV PAL (20)
SHASWATA ROY (30)
HUMAYUN KABIR (02)
KUNTAL DAS (40)
RAJ MODAK (25)
&
HASIM AHSAN HAQUE (32)
3RD YEAR
CIVIL ENGINEERING DEPERTMENT

3. INTRODUCTION TO PAVEMENT DESIGN
CONCEPTS

4. INTRODUCTIONTO PAVEMENT DESIGN CONCEPTS
 WHAT IS PAVEMENT ?
 Types of pavement
 Principal of pavement design
 Pavement failure & its types
 Aspects of pavement design
 Pavement thickness design approaches
 Methods of pavement design

5. WHAT IS PAVEMENT ?
The “PAVEMENT” is the structure which separates the tyres of vehicles from
the underlying foundation material. The lateris generally the soil but it may
be structural concrete or a steel bridge deck .

6. TYRES OF PAVEMENT
FLEXIBLE PAVEMENT
RIGID PAVEMENT
COMPOSIT PAVEMENT

7. FLEXIBLE PAVEMENT
 “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.

8. RIGID PAVEMENT
 In “RIGID PAVEMENT”s the
stress is transmitted to the sub-
grade through beam/slab effect.
Rigid pavements contains
sufficient beam strength to be
able to bridge over localized
sub-grade failures and areas of
inadequate support .

9. COMPOSIT (PCC) PAVEMENT
 A composite pavement is composed
of both hot mix asphalt (HMA) and
hydraulic cement concrete.
Typically, composite pavements are
asphalt overlays on top of concrete
pavements. The HMA overlay may
have been placed as the final stage
of initial construction, or as part of
a rehabilitation or safety
treatment.

10. OTHER PAVEMENTS :-
Perpetual Pavement
Continuously Reinforced
Concrete Pavement
Jointed Reinforced Concrete Pavement
(JRCP)
Post-tensioned Concrete
Pavements

11. PRINCIPLES OF PAVEMENT DESIGN
• Pavement design is the process of developing the most
economical combination of pavement layers (in relation
to both thickness and type of materials) to suit the soil
foundation and the traffic to be carried during the
design life .
• The pavement as whole limit the stresses in the sub-
grade to an acceptable level , & the upper layers must
in a similar manner protect the layers below .

12. PRINCIPLES OF PAVEMENT DESIGN
• The tensile and compressive stresses induced in a pavement by
heavy wheel loads decrease with increasing depth . This permits
the use , particularly in flexible pavement , of a gradation of
materials , being used for the surfacing and less strong and
cheaper ones for base and sub-base .