02-20-2014, 11:23 AM
It may be a matter of opinion. Vibration is not often used on residential concrete. Vibration can also cause problems. Vibrating moves the concrete within the form. Too much movement and it may break the forms. I've seen it happen.
In conditions where there is a lot of bunched rebar vibration helps make sure the consolidation around the rebar is good. Bridges and abutments have lots of rebar. When there are large finished faces of concrete vibration will help ensure a smooth face without pocketing or voids. Rarely does residential work exceed 12" in depth. Commercial and industrial work does.
My advice for residential is do not rent or use a vibrator and do pay attention to the proper slump. Light tamping and tapping the forms will usually provide all the vibration needed on a residential pour.
In conditions where there is a lot of bunched rebar vibration helps make sure the consolidation around the rebar is good. Bridges and abutments have lots of rebar. When there are large finished faces of concrete vibration will help ensure a smooth face without pocketing or voids. Rarely does residential work exceed 12" in depth. Commercial and industrial work does.
My advice for residential is do not rent or use a vibrator and do pay attention to the proper slump. Light tamping and tapping the forms will usually provide all the vibration needed on a residential pour.
Assume the best and ask questions.
Punaweb moderator
Punaweb moderator