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Match the field equipment Drum roller (K), Rubber tire roller (L), Sheep foot roller (M), Vibratory roller (N) with corresponding laboratory equipment Vibratory compaction (P), Impact compaction (Q), Kneading compaction (R), Static compaction (S):
1. K-S; L-R; M-Q; N-P
2. K-S; L-Q; M-R; N-P
3. K-R; L-S; M-Q; N-P
4. K-R; L-Q; M-S; N-P

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Correct Answer - Option 2 : K-S; L-Q; M-R; N-P

Explanation:

(i) In the field, soil is compacted by applying energy through mechanical equipment. The energy is transmitted to the soil by applying pressure in any one of the following three ways

  • Static pressure (using rollers)
  • Impact (using rammers)
  • Vibration (using vibrator)

(ii) Drum roller is used for static compression since it produced uniform stress over an area.

(iii) Rubber tire roller is best used for impact compaction since rubber is a resilient material and can absorb impact energy.

(iv) Sheep foot rollers are used for compaction of clays by kneading action.

(v) Vibratory rollers are used in laboratory for vibratory compaction.

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