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Structural failures considered in the mechanistic method of bituminous pavement design are

1. Fatigue and Rutting
2. Fatigue and Shear
3. Rutting and Shear
4. Shear and Slippage

Correct answer: Fatigue and Rutting

Solution

In mechanistic design of bituminous pavements, the critical structural failures are fatigue cracking due to repeated loading and rutting due to permanent deformation. These are the primary distress modes used to limit pavement response under traffic loads.

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