JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

Engineering analysis of stresses and strains in typical highway pavement structures due to loading from traffic and climate; characterization of paving materials; structural pavement design.

Course Outcomes:

• Analyze the stresses and strains in a flexible pavement using multi-layered elastic theory.
• Analyze stresses and strains in a rigid pavement using Westergaard’s theory.
• Design a flexible pavement using IRC, Asphalt Institute, and AASHTO methods.
• Design a rigid pavement using IRC, and AASHTO methods. Design of joints, Dowel & tie bars.

UNIT - I

Factors Affecting Pavement Design: Variables Considered in Pavement Design, Types of Pavements, Functions of Individual Layers, Classification of Axle Types of Rigid Chassis and Articulated Commercial Vehicles, Legal Axle and Gross Weights on Single and Multiple Units, Tire Pressure, Contact Pressure, EAL and ESWL Concepts, Traffic Analysis: ADT, AADT, Truck Factor, Growth Factor, Lane Distributions & Vehicle Damage Factors, Effect of Transient & Moving Loads.

UNIT - II

Stresses In flexible Pavement: Vehicle-Pavement Interaction: Transient, Random & Damping Vibrations, Steady State of Vibration, Experiments on Vibration, Stress Inducing Factors in Flexible and Rigid pavements; Stress In Flexible Pavements: Visco-Elastic Theory and Assumptions, Layered Systems Concepts, Stress Solutions for One, Two and Three Layered Systems, Fundamental Design Concepts;.

UNIT - III

Stresses in Rigid Pavements: Westergaard’s Theory and Assumptions, Stresses due to Curling, Stresses and Deflections due to Loading, Frictional Stresses, and Stresses in Dowel Bars & Tie Bars.

UNIT - IV

Design of Flexible Pavements: Factors effecting Design. Deflection studies in Flexible Pavements. Present Serviceability Index.IRC guidelines for Flexible Pavements.Pavement Performance and methods- AASHTO and Asphalt Institute Method. Need for Overlays, Overlays design methods for Flexible and Rigid pavements.

UNIT - V

Design Of Rigid Pavements: Factors effecting Design - Wheel load & its repetition, subgrade strength & proportion, strength of concrete- modulus of elasticity. Reinforcement in slab.Design of joints.Design of Dowel bars.Design of Tie bars. IRC and AASHTO methods of Rigid Pavement design.

REFERENCES:

• 1. Design of Functional Pavements, Nai C. Yang, McGraw Hill Publications
• 2. Concrete Pavements, AF Stock, Elsevier, Applied Science Publishers
• 3. Principles of Pavement Design, Yoder.J. &Witzorac Mathew, W. John Wiley & Sons Inc
• 4. Pavement Analysis & Design, Yang H. Huang, Prentice Hall Inc.
• 5. Pavement and Surfacing for Highway & Airports, Micheal Sargious, Applied Science Publishers Limited.
• 6. IRC: 37 & 58 Codes for Flexible and Rigid Pavements Design. M. Tech – I Year – II Sem. (Highway. Engg.)