What is a poker vibrator for concrete?

Immersion Vibrators Frequently referred to as ‘poker’ or ‘spud vibrators’, immersion vibrators consist essentially of a tubular housing which contains a rotating eccentric weight. The out-of-balance rotating weight causes the casing to vibrate and, when immersed in concrete, the concrete itself.

How do you use a concrete poker vibrator?

Submerge the vibrator head fully into the concrete, and hold it there for at least 10 seconds. Don’t turn on the vibrator until the tip is fully submerged. Pull up the vibrator at an average rate of no more than 3 inches per second; often, 1 inch per second yields the best results.

What is a poker machine in construction?

Concrete vibrating poker is used to vibrate wet concrete to remove air bubbles that then provide consistency and strength to the concrete.

Can you vibrate concrete too much?

Can You “Over-Vibrate” Concrete? Vibrating concrete too much has shown to do very little damage, while under-vibrating concrete can leave large pockets of air trapped within it or change the appearance of the concrete. Because of this, it’s important that each section of concrete is vibrated for around 15 seconds.

How much should you vibrate concrete?

Therefore, workers should vibrate between 5 and 15 seconds to ensure the second phase of consolidation or de-aeration is achieved. Doing so will reduce the amount and size of surface voids including bug holes and in general, improve the overall quality and appearance of the concrete.

Does all concrete need to be vibrated?

Yes, all concrete should be consolidated. Contractors tend to use mechanical vibrators such as spud vibrators, vibratory screeds, and form vibrators. Contractors tend to use spud vibrators for formed structures such as foundation walls, footings, elevated slabs, etc.

What happens if concrete not vibrated?

Concrete which has not been vibrated is full of small air pockets (sometimes known as honeycombing) which results in a poor finish and weak structure.

What causes concrete pinholes?

Surface voids as pinholes and air bubbles are caused when air is entrapped during the curing of the concrete. Changes to the concrete mix design maybe required to ensure the correct viscosity for the application. The type of product/mould/compaction will have a direct impact on the mix viscosity required.

Should all concrete be vibrated?

What is Honeycombing in concrete?

Honeycombing is the term used to describe areas of the surface that are coarse and stony. It may be caused by insufficient fine material in the mix, perhaps due to incorrect aggregate grading or poor mixing.

How far apart should concrete be when vibrating?

about 6 feet apart
Space the vibrators about 6 feet apart for best results. Be sure the formwork can vibrate freely: The concrete formwork will need to vibrate sufficiently.

Can a poker vibrator be used to compact concrete?

The poker must not touch the formwork. Slump of concrete for compacting by means of a poker vibrator is normally between 50 to 125 mm. Geotechnical-Material Engineer.

How do you use a concrete poker?

The poker must be inserted at regular intervals in both directions. Points of insertion should be no more than 10 times poker diameter. Where void formers occur, concrete should be placed and compacted from one side until it has flowed under the obstruction. The poker must not touch the formwork.

What is the slump of concrete for compacting by vibrator?

Slump of concrete for compacting by means of a poker vibrator is normally between 50 to 125 mm. Geotechnical-Material Engineer. You can follow me on Instagram. You can connect me on Google +.