Which of the following advanced technologies is commonly used to ensure uniform compaction of concrete in modern construction projects?
Vibratory compaction equipment
Proper compaction of concrete removes entrapped air voids and ensures full consolidation around reinforcement. Modern construction uses vibratory compaction equipment:
- Internal (needle/poker) vibrators: Inserted into concrete, vibrate at high frequency (≈50–200 Hz), causing concrete to flow and air to escape
- External (form) vibrators: Attached to formwork for thin sections
- Vibrating tables: For precast elements
Laser levelling only ensures surface flatness, not compaction. Manual tamping is inadequate for structural concrete. High-pressure water jets are not used for concrete compaction.
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