Vibrating Concrete Stem Wall

One of the most important steps when pouring concrete is the consolidation or vibration of concrete.

Vibrating concrete stem wall.

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. Concrete vibrator 3 4hp 800w electric hand held power concrete vibrator construction vibrator cement bubble remover 1 2m hose us stock by shzicmy 48 99 48. 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. Dave and his sons build resi.

I just finished a pour of a 2 stem wall with someone who has more experience than me. The basic principles of placement and vibration are the same for any placing equipment used. With surface vibration large vibrators sometimes called jumpers are directed manually onto the surface of the poured concrete. Some odds and ends shots taken while forming and pouring a residential raised floor foundation as opposed to a slab on grade.

1 6hp honda concrete vibrator with 10ft flex shaft cable whip backpack 12000 vpm. 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. When vibrating a wall the important consideration is to make sure that all of the concrete is exposed to the vibration. Reduce cold joints honeycombing and bugholes by training workers how to place and vibrate concrete in walls.

4 stroke concrete vibrators 4 8 hp single cylinder w ohv valve system 35mm dia. If problems occur however corrective action can minimize their recurrence. In concrete vibration external vibrators are electric or pneumatic concrete vibrators that mount to the exterior side of form work and cover a large area and usually you can space them 6 apart. Formwork vibration is commonly used in precast concrete construction and involves mounting the vibrators to the outsides of the concrete forms for larger pours the external form vibrators are often spaced 6 feet apart.

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.