How should internal vibrators be permitted to sink in concrete?

The correct approach for allowing internal vibrators to sink in concrete is to let them descend under their own weight. This method ensures that the vibrator properly integrates with the concrete matrix without introducing air pockets or causing excessive agitation that could disturb the mix or compromise the final structure.

When vibrators are allowed to sink under their own weight, it facilitates a uniform vibration throughout the pour, enhancing consolidation. This process helps to eliminate voids or air bubbles that can weaken the structural integrity of the concrete.

Using a lot of force or pushing the vibrator may lead to uneven vibrations, which can disrupt the concrete's consistency and result in an undesirable finish. Similarly, a gentle push does not provide the necessary consistent contact with the concrete to achieve effective consolidation.

Therefore, permitting internal vibrators to sink naturally under their own weight is essential for achieving optimal results in terms of both the quality and strength of the cured concrete.