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Which one of the following defects indicated progressive disintegrations of bituminous premix carpet surfacing by loss of aggregates?


1. pot holes
2. Ravelling
3. edge breaking
4. rutting
5.

1 Answer

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Best answer
Correct Answer - Option 1 : pot holes

Explanation:

Types of a defect in the flexible pavement:

  • Surface defect
  • Crack
  • Deformation
  • Disintegration
Types of distress Symptoms
A) Surface defect  
  • Fatty surface
  • Collection binder on the surface
  • Smooth surface
  • Slippery
  • Streaking
  • Presence of alternate lean and heavy lines of bitumen
  • Hungry surface
  • Loss of aggregate or presence of fine cracks
B) Cracks  
  • Hairline crack
  • Short and fine cracks at close intervals on the surface
  • Alligator cracking
  • Interconnected cracks forming a series of small block
  • Longitudinal crack
  • Crack on a straight line along the road
  • Edge crack
  • Cracks near and parallel to pavement edges
  • Shrinkage crack
  • Cracks in transverse direction or inter-connected cracks forming a series of large blocks
  • Reflection crack
  • Sympathetic crack over joints and cracks in the pavement underneath
C) Deformation  
  • Slippage
  • Formation of crescent-shaped cracks pointing in the direction of the thrust of wheels.
  • Rutting
  • Longitudinal depression in the wheel crack
  • Corrugations
  • Formation of regular undulations
  • Shoving
  • Localized bulging of pavement surface along with crescent-shaped crack
  • Shallow depression
  • Localized shallow depression
  • Settlement and upheaval
  • Large deformation of pavement
D) Disintegration  
  • Stripping
  • Separation of bitumen from aggregates in the presence of moisture
  • Loss of aggregates
  • Rough surface with loss of aggregates in some portions
  • Raveling
  • Failure of binder to hold the aggregates shown up by pockmarks of eroded areas on the surface
  • Pothole
  • The appearance of bowl-shaped holes, usually after rain.
  • This indicated progressive disintegrations of bituminous premix carpet surfacing by loss of aggregates.
  • Edge breaking
  • Irregular breakage of pavement edges.

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