Answered: What is the primary function of the…

What is the primary function of the pavement structure? Why do we use high quality materials as we go from bottom to top of the pavement structure?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter18: Bituminous Materials

Section: Chapter Questions

Problem 2P

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Concept explainers

Design of pavements

Pavement is a structure that is made up of different layers such as sub-base course layer, base course layer, binder course, and a surface course formed with different materials such as gravel, above the subgrade soil constructed to act as a path or carriageway enabling the movement of vehicles. The surface of the pavement should possess characteristics such as adequate friction, light reflection, and drainage. The pavements are classified based on structural design into rigid pavements, flexible pavements, composite pavements, and unpaved pavements. The process of determining a suitable pavement type, its constituent layers, and its thickness is called pavement design.

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Question 18 A rigid pavement has a wheel load capacity of 53.96 kN. The allowable tensile stress of concrete is 1.37 MPa. Determine the thickness (cm) of the pavement if dowels are negligible. Express your answer in 1 decimal place.
3. a) What is meant by dowel bar? Why it is used in the rigid pavement? b) Design the Dowel Bars for the following parameters: i) Design wheel load = 5100 kg ii) Design load transfer 40% iii) Slab thickness 30 cm iv) Joint width = 2.0 cm v) Modulus of dowel support = 42000 kg/em3 vi) Modulus of elasticity of dowel bar = 2x106 kg/cm2 vii) Modulus of subgrade reaction = 8 %3D viii) Grade of concrete = M 50
A rigid pavement is to be used to carry a wheel load of 58.77 kN. Enough dowels will be used across the joint. The allowable tensile strength of concrete is 1.45 MPa. Thus, what will be the difference in thickness (in mm) between the edge and the center of the pavement?
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A rigid pavement is to be used to carry a wheel load of 57.62 kN. Enough dowels will be used across the joint. What will be the difference in thickness (in mm) between the edge and the center of the pavement? The allowable tensile strength of concrete is 1.32 MPa. Round off to the nearest whole number.