CON/General/TBT-CON-026
Concrete Vibration and Compaction Techniques
Concrete & Formwork › General › Concrete Vibration and Compaction Techniques
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Concrete Vibration and Compaction Techniques
Concrete vibration removes trapped air and ensures full compaction around reinforcement and formwork. Using a poker vibrator or external vibrator incorrectly can cause segregation, formwork failure, and hand-arm vibration injuries. Operatives must understand how to vibrate concrete safely and effectively to achieve the specified quality and protect their health.
Key Hazards
Hand-arm vibration syndrome from prolonged poker vibrator use
Formwork blowout from over-vibration or excessive pour rates
Concrete segregation from incorrect vibrator insertion technique
Electric shock from damaged vibrator cables in wet conditions
Control Measures
- Limit individual exposure to vibrating equipment using the daily exposure action value guidance.
- Rotate operatives on vibrator duty to reduce individual hand-arm vibration exposure time.
- Insert the poker vertically into the concrete and withdraw slowly to avoid trapping air.
- Do not touch the reinforcement or formwork with the vibrator head to prevent damage.
- Monitor formwork tie pressures during vibration and stop if any signs of movement appear.
- Inspect all vibrator cables, plugs, and connections before use in wet concrete conditions.
- Use low-vibration equipment where available to reduce hand-arm vibration exposure levels.
- Brief operatives on the correct vibration pattern, insertion depth, and spacing for the pour.
- Report any tingling, numbness, or whitening of fingers to the supervisor for health surveillance.
Remember
- Rotate vibrator operators regularly to reduce individual hand-arm vibration exposure
- Insert the poker vertically and withdraw slowly for effective air removal
- Never touch reinforcement or formwork with the vibrator head during compaction
- Monitor formwork closely during vibration and stop if signs of movement appear
- Report any tingling, numbness, or whitening of fingers to your supervisor immediately
Applicable Legislation: Control of Vibration at Work Regulations 2005 · PUWER 1998 · COSHH 2002 · Electricity at Work Regulations 1989
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