What is cause of Honeycombing and cavities in this column concrete

[Sumit Civil]

What is cause of Honeycombing and cavities in this column concrete

There is no slurry seen, aggregates only seen and reinforcement bars also seen with cavities.

What is wrong happen to cause this.

 

[rames.psg]

Lesser fine aggregate

Precisely poor concrete mix and vibrator may not be used also improper cover reinforcement

 

[Velavan. R]

Concrete attain segregation

 

[Manoj pathak]

What is cause of Honeycombing and cavities in this column concrete

There is no slurry seen, aggregates only seen and reinforcement bars also seen with cavities.

What is wrong happen to cause this.

View attachment 2624

The major reason of honeycomb concrete is poor grading. In this columns it seems that the grading of coarse and fine aggregate is not proper resulting honeycomb concrete.

 

[Velavan. R]

Concrete attain segregation

If there is large amount of fineness there is no use of concrete attain segregation

 

[Er.sameer ansari]

Actual the main reason of honey comb, In this pic u clearly see their is no cover block provided between bars and fomework thats why this will take happen

 

[Choudhury Jiban]

Not hammering not vibrating properly in casting and high slump . not tight in shuttering plate ...gap between plate and surface not using fume in tha gap between plate and surface

 

[Velavan. R]

Not hammering on that place is in gabs, didn't do vibrator concrete doesn't attain upto the portion,high flow will give good finishing, incase of slurry leakage due to improper shuttering having particular area only affected

 

[Indrajeet kumar]

The use of only 20mm aggregate is not sufficient, 10mm aggregate should also be provided to fill up the gaps.... And proper vibration is not done here... Needs to be done...

 

[johnswa]

No grading of coarse aggregate. Improper mix ratio (fine aggregate is not sufficient) and improper vibrating.

 

[sardum]

What is cause of Honeycombing and cavities in this column concrete

There is no slurry seen, aggregates only seen and reinforcement bars also seen with cavities.

What is wrong happen to cause this.

View attachment 2624

Due to this the concrete not properly compacted,so bond stree will not properly developed and due to moisture contact with reinforcement bar corrosion genrate on the reinforcement bar and crack developed on the surface of the concrete.

 

[Mi6Lind]

In this type of casting of column. Honeycombing reason in my purpose fine aggregate is low mix and shuttering work not properly and vibrator not used. Need the main three above reason to become properly then it work to be done strongly.

 

[ubaid ahmad]

due to high workability of concrete ...
no vibrator used

 

[anilsharma]

On account of not proper shuttering no proper vibrator, concrete mix may not be properly made; no cover to reinforcement are the reasons for honeycombing

 

[mayank.zeal]

1) Grading of aggregates
or
2) less quantity of fine aggregates.
or
3) less use of vibrator.

 

[HockeyPuck]

The root cause of the issue - Poor mix. There is not enough cement. QC needs to catch this before the mix is placed and not allow it to be placed. Vibration/consolidation is certainly a secondary issue, but, without having a homogeneous mix, vibrating won't fix it.

 

[Gnimkar]

This is due to no proper vibration or portion of concrete.also no cover provided

 

[MAHESWAR KABI]

poor supervision work & poor shuttering work , that's enough ...

 

[AS-SHABBIRK]

As per the Picture & even for honeycomb, there are many technical reasons.
1) Improper proportion of concrete mix.
2) Improper W\C ratio i.e. either more water or even less water than requirement as per design.
3) If only cover block is not there, than at surface bars may appear but inside concrete must be firm & compact.
4) Due to either less or even more vibration by needle or without needle, segregation may be there.
5) Due to improper shuttering, slurry may come out while compaction & vibration.

 

[Oluseun]

Poor concrete mix
Poor column formwork that leads to leakages of poured concrete
Over vibration with vibrating machine can also leads to leakages of poured concrete