What is the primary application of vibrating tables in construction?

They are used for uniform compaction of concrete in molds, heavily utilized for precast concrete products and laboratory test specimens (cubes/cylinders).

What is the standard frequency required for these tables?

The mechanism is designed to operate typically between 3000 to 6000 vibrations per minute to effectively consolidate standard concrete mixes.

Can the amplitude of the vibrating table be adjusted?

Yes, many standard vibrating tables feature adjustable eccentric weights to vary the amplitude based on the payload and the harshness of the concrete mix.

IS 2514

: 1963

Concrete Vibrators, Vibrating Tables - Specification

CurrentSpecializedSpecificationGeneral · Scaffolding, Formwork and Construction Equipment

Download PDF BIS Portal Google

This standard prescribes the requirements for vibrating tables used for the compaction of concrete in laboratories and precast manufacturing. It covers standard dimensions, load capacities, motor specifications, and the mechanical characteristics of the vibrating mechanism.

Specifies requirements for vibrating tables used for compacting concrete specimens or precast units.

Quick Reference Values

frequency of vibration3000 to 6000 vibrations per minute

amplitude of vibrationAdjustable, typically up to 1.5 mm

operating voltage415V 3-phase or 240V single-phase

Practical Notes

Ensure the vibrating table is placed on shock-absorbing mounts (like heavy-duty springs or rubber pads) to prevent vibration transmission to the structural floor.

Molds must be rigidly clamped to the table top; loosely held molds will bounce, leading to poor compaction and potential damage.

Over-vibration can cause segregation of the concrete mix; vibration time should be carefully monitored based on mix workability.