The GATE Grind

GATE 2019 CE (CE2) – Question 21

Highway Pavements · Design of flexible and rigid pavements · 1 mark · Multiple choice

Structural failures considered in mechanistic bituminous-pavement design are ______.

  1. Fatigue and rutting
  2. Fatigue and shear
  3. Rutting and shear
  4. Shear and slippage

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Correct answer: (A) Fatigue and rutting

Explanation

Repeated tensile strain near the bottom of the bituminous layer controls fatigue cracking. Repeated compressive strain at the subgrade controls rutting. These are the paired structural criteria in the stated mechanistic approach: **fatigue and rutting,A**.