Rebar Shakers | Uses, Advanatges & Disadvantages of Rebar Shakers

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In this article, we will discuss rebar shakers.


  1. Introduction  

A rebar shaker is made to turn reinforcing bars into a vibrator. It is slipped over steel bars, permitted to vibrate and liquidity the concrete and consolidate within 5-7 seconds. So, it would not need to utilize an internal vibrator.

The rebar shaker is best for circumstances where the concrete cannot get to and consolidated quickly, for instance, reinforced concrete block masonry and congested members.

Concrete in reinforced concrete masonry walls changes to a plastic state quickly compared with other cases of concrete casting because concrete blocks absorb a portion of water present in the concrete mixture.
Therefore, the compaction process should be performed as soon as possible before concrete changes into the plastic state. This can be done with the utilization of a rebar shaker.
Rebar Shakers

  2. Rebar Shakers  

The device is used to decrease the time needed to put a needle vibrator to the bottom of the reinforced masonry wall. Sometimes, table vibrators are connected to steel bars with the best fittings to consolidate concrete in heavily crowded concrete members.
This concept has been proposed by ACI 309R-5. However, utilizing external vibrators as reinforcement shakers should be neglected since the vibrator can get damaged.

  3. Uses of Rebar Shakers  

The uses of the shaker are as follows:

a. The Rebar shakers are utilized to consolidate: Heavy crowded reinforced concrete walls and columns
b. The reinforced concrete unit blocks masonry walls.

  4. Advantages of Rebar Shakers  

The advantages of rebar shakers are as follows: 

a. It is connected to the top of the steel bar effortlessly.

b. Need less workforce compared with a case of using an internal vibrator.

c. Saves time required for filling and refilling concrete block cells, cleaning works, and lost time that may occur due to injury from slips and falls.

d. It eliminates labor errors such as pulling the vibrator head out of the concrete quickly, resulting in poor concrete consolidation and a weak bond between concrete and steel bars.

e. It enough consolidates concrete in heavily crowded elements and reinforced concrete block masonry, providing a good concrete-steel bar bond.


  5. Disadvantages of Rebar Shakers  

The disadvantages of rebar shakers are as follows: 

a. Rebar shakers may lose ties due to excessive vibrations or improper fastening of the transfer reinforcement.

b. It is expensive to buy.

c. Skilled manpower is needed.


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