Reduce cold joints honeycombing and bugholes by training workers how to place and vibrate concrete in walls.
Vibrating concrete stem wall.
One of the most important steps when pouring concrete is the consolidation or vibration of concrete.
When vibrating a wall the important consideration is to make sure that all of the concrete is exposed to the vibration.
Concrete vibrators if used properly will help consolidate concrete and will reduce the number of air pockets inside the concrete mass you can use internal vibrators or external vibrators depending on the application and where the concrete is being placed.
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Some odds and ends shots taken while forming and pouring a residential raised floor foundation as opposed to a slab on grade.
The basic principles of placement and vibration are the same for any placing equipment used.
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Dave shares his design method of pouring a concrete block stem wall so as to make a strong connection with the concrete slab pored at the top of the stem wal.
Used ozec 1 8 oz electric concrete vibrator pump unit only.
If problems occur however corrective action can minimize their recurrence.
With surface vibration large vibrators sometimes called jumpers are directed manually onto the surface of the poured concrete.
I just finished a pour of a 2 stem wall with someone who has more experience than me.
For thin walls where an insertion at the center of the wall would be sufficient to reach both walls a good rule of thumb would be to choose a vibrator with a radius of influence equal to 3 4 the total thickness of the wall.
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The use for external vibrators include floor to ceiling walls beam and one sided blind walls.
From my limited experience with concrete i have always been under the impression that it is easy to over vibrate thus pushing most of the aggregate to the bottom and or forcing air out of the concrete.
1 6hp honda concrete vibrator with 10ft flex shaft cable whip backpack 12000 vpm.