* Which of the following statement is not true about compaction for asphaltic concrete? The temperature asphaltic concrete at the commencement of rolling shall not be less than 120 oC (increased by 10 oC for penetration grade 60-70 bitumen). Initial rolling shall be carried out using steel wheel tandem roller. The pneumatic tyre roller shall operate at speeds of not more than 8km/h. O None of the above.

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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.