Reply by Dennisgrosen

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Posted on concrete countertops

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10880 posts in 3624 days

#1 posted 09-27-2010 08:13 PM

after you have made your form then make 15-20 small round dovel thickness ½ inch
where you make a small V in one end
cut a net where the size is about 2 inch smaller than the form in both direction
the net you have to use , ise normaly used in concrete floors, the purpose of the net
is to prevent the concrete from cracking
they are in several thickness from 4 – 10 mm hole size 4 inch the 4mm will do fine to your projeckt

now back to the dovel blocks you place them under the net in the form so the net is in the mittle
of the finished concrete

after you have pured the concrete in the form you take a powerhandrill with that allso have a poor
hammer effect and place a roundhead bolt in the drill still the maschine on the hammer logo
and start vibrate the concrete by placing the bolt head against the form sides just go slowly around the form when you do it and if you have placed the form on 4 heavy sawhorses then do it several places on the bottom too
why doing this ? you want to get rit of airbobles and have the concrete floating in to every little corner

after the concrete is dry (takes a week to gain its strength before you can work with it)
but at that time you open the form and turn the concrete around
drill out half of the dovel in all dovels fill the holes with concrete so it have a little top on

when they are dryed up
you take a grinder with a cupgrindingstone on and remember it shuold be one of them to stonework
then you grind the first mm of the concrete if there shuold bee a few small airholes left (remember filtermask)
when you are finished so its smooth then pure it with some oil and rub it out

but this grinding and oil thing make a samle to try on so you know a little about how it behave
before you try to destroy the table…lol

and a good adwice get a giraf crane to help you turn the table and build a realy sturdy undercariage for it

good luck


Edit : I hope my points come thrugh and can help you

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