search
arrow-left Previous
Next arrow-right
Q: For construction of WBM roads, which of the following is the correct sequence of operation after spreading the crushed aggregate?
  • A. Dry rolling, wet rolling, application of binding material, filling voids with screening
  • B. Wet rolling, application of binding material, dry rolling, filling voids with screening
  • C. Filling voids with screening, application of binding material, dry rolling, wet rolling
  • D. Dry rolling, filling voids with screening, wet rolling, application of binding material
Correct Answer: Option D - WBM roads:– In this method, the broken stones of the base course and surface course, if only, are bound by the stone dust in presence of moisture. • The process of WBM are:– (i) Dry rolling (ii) Application of screening (iii) Sprinklings of grouting (iv) Wet rolling (v) Application of binding material (vi) Checking for surface unevenness and rectification
D. WBM roads:– In this method, the broken stones of the base course and surface course, if only, are bound by the stone dust in presence of moisture. • The process of WBM are:– (i) Dry rolling (ii) Application of screening (iii) Sprinklings of grouting (iv) Wet rolling (v) Application of binding material (vi) Checking for surface unevenness and rectification

Explanations:

WBM roads:– In this method, the broken stones of the base course and surface course, if only, are bound by the stone dust in presence of moisture. • The process of WBM are:– (i) Dry rolling (ii) Application of screening (iii) Sprinklings of grouting (iv) Wet rolling (v) Application of binding material (vi) Checking for surface unevenness and rectification