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Soil stabilization, equipment, mass haul characteristics

Short answer

Soil stabilization improves soil strength and durability by mechanical means or admixtures. Key equipment: bulldozer, excavator, grader, rollers, water tanker, pulveriser, spreader, hot-mix plant, paver, crusher. Mass haul diagram shows cumulative cut/fill; rising curve means cut exceeds fill, peak marks cut-to-fill, balancing line gives equal cut/fill, area gives haul volume.

Define soil stabilization and list out the equipments used for road construction. List out the characteristics of Mass haul Diagram.

Soil stabilisation

Soil stabilisation is the process of improving the engineering properties of a soil, such as strength, bearing capacity, durability, volume stability and resistance to water, by mechanical means or by adding admixtures (cement, lime, bitumen, chemicals) so that it can be used in a road subgrade, sub-base or base.

Equipment used for road construction

  • Earth work: bulldozer, excavator, loader, scraper, motor grader, tippers.
  • Compaction: smooth-wheel, vibratory, sheep-foot and pneumatic tyre rollers, plate compactors.
  • Granular layers and stabilisation: grader, water tanker, pulveriser (rotavator), cement/lime spreader.
  • Bituminous work: bitumen heater, pressure distributor, hot-mix plant, paver-finisher, chip spreader.
  • Concrete work: batching plant, transit mixer, paver, vibrators, joint cutter.
  • Aggregate: stone crusher and screens.

Characteristics of the mass haul diagram

  1. A rising curve shows that cut exceeds fill; a falling curve shows that fill exceeds cut.
  2. A peak marks a change from cut to fill, and a valley marks a change from fill to cut.
  3. A horizontal line (balancing line) cuts the curve at points between which cut and fill are equal, so the earth between these points is balanced.
  4. The vertical distance from the balancing line to the peak (or valley) between two such points gives the volume of earth moved from cut to fill in that section.
  5. The length of the balancing line between two intersection points gives the maximum haul distance for that balanced volume.
  6. Where the curve lies above the balancing line, the haul is forward (in the direction of increasing chainage); where it lies below, the haul is backward.
  7. The area between the curve and the balancing line is the haul (volume times distance, m3-m); dividing it by the balanced volume gives the average haul distance.
  8. A steep slope shows heavy earthwork; a flat portion shows little net cut or fill.
  9. The ordinate at the end of the curve gives the net excess (to be wasted) or deficit (to be borrowed) for the whole length.

✓ Answer checked by Claude Opus 5.5 (high effort)

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