24
Pavements
CHAPTER HIGHLIGHTS
Components of pavements; Types and requirements; subgrade; pavement design – Wheel load – Flexible and rigid pavement; Methods – Group Index – CBR – Mc Leod – Burmister – Westergaard's – IRC
24.1 INTRODUCTION
A pavement is the main structure of a road or a runway, which is relatively a stable layer or a crust constructed over the natural soil. The natural soil is called a subgrade. The main function of a pavement is to support and distribute the wheel loads of vehicles through the underlying layer to the subgrade.
24.2 COMPONENTS OF PAVEMENT
Subgrade is the bottom-most level of a pavement, which is termed as the formation level over which other layer are laid, namely, sub-base, base and surface courses ( ...
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