JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre Requisites

Transportation Engineering

Course Objectives

The study factors affecting pavement design, material characteristics,

design of flexible, rigid pavements and low volume roads.

Course Outcomes

At the end of the course, the student will be able to:

• Characterize the response characteristics of soil, aggregate, asphalt, and asphalt mixes
• Analyze flexible pavements
• Analyze rigid pavements
• Design a flexible pavement using IRC, Asphalt Institute, and AASHTO methods
• Design a rigid pavement using IRC, and AASHTO methods

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, Directional Distributions & Vehicle Damage Factors, Effect of Transient & Moving Loads.

UNIT - II

Stresses In Pavements: Vehicle-Pavement Interaction: Transient, Random & Damping Vibrations, Steady State of Vibration, Experiments on Vibration, Stress Inducing Factors in Flexible and Rigid pavements. Stresses In Flexible Pavements: Visco-Elastic Theory and Assumptions, Layered Systems Concepts, Stress Solutions for One, Two and Three Layered Systems, Fundamental Design Concepts. Stresses In Rigid Pavements: Westergaard’s Theory and Assumptions, Stresses due to Curling, Stresses and Deflections due to Loading, Frictional Stresses, Stresses in Dowel Bars & Tie Bars

UNIT - III

Material Characteristics: CBR and Modulus of Subgrade Reaction of Soil, Mineral aggregates – Blending of aggregates, binders, polymer and rubber modified bitumen, Resilient, Diametral Resilient and Complex (Dynamic) Moduli of Bituminous Mixes, Permanent Deformation Parameters and other Properties, Effects and Methods of Stabilization and Use of Geo Synthetics.

UNIT - IV

Design Of Flexible Pavements: Flexible Pavement Design Concepts, Asphalt Institute’s Methods with HMA and other Base Combinations, AASHTO, IRC Methods Design Of Rigid Pavements: Calibrated Mechanistic Design Process, PCA, AASHTO & IRC Specifications, and Introduction to Prestressed and Continuously Reinforced Cement Concrete Pavement Design.

R16 B.TECH CIVIL ENGG.

UNIT - V

Design of Pavement for Low Volume Roads: Pavement design for low volume roads, rural road designs – code of practice. Design of Overlays: Types of Overlays, Suitability, Design of overlays.

TEXT BOOKS:

• 1. Concrete Pavements, AF Stock, Elsevier, Applied Science Publishers
• 2. Pavement Analysis & Design, Yang H. Huang, Prentice Hall Inc

REFERENCES:

• 1. Design of Functional Pavements, Nai C. Yang, McGraw Hill Publications
• 2. Principles of Pavement Design, Yoder.J. & Witzorac Mathew, W. John Wiley & Sons Inc
• 3. Pavement and Surfacings for Highway & Airports, Micheal Sargious, Applied Science Publishers Limited.
• 4. IRC Codes for Flexible and Rigid Pavements design R16 B.TECH CIVIL ENGG.