A cement concrete pavement has a thickness of 24 cm and has two lanes of total width 7.2 m, with a longitudinal joint. Design the dimension and spacing of the bars, using the following data: (i) Allowable working stress in steel in tension = 1400 kg/cm² (ii) Unit weight of concrete = 2400 kg/m³ (iii) Coefficient of friction = 1.5 (iv) Allowable bond stress in concrete = 24.6 kg/cm²

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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.