Re: [ATM] portland cement; grind. etc.

["Malcolm Macdonald" <toliman@wave.co.nz>]

----- Original Message ----- 
From: "KR" <kreid@primus.ca>
To: <atm@atmlist.net>
Sent: Sunday, June 25, 2006 9:24 AM
Subject: [ATM] portland cement; grind. etc.


> Greetings,
>     The cheap grinding, polishing tool made from portland cement has a
> limited life.
> I've had two break unto pie shaped wedges after a years time. Just a note 
> to
> those who
> like to spend eternity perfecting.
>                                                                regardes
> KR
>
>
Sounds like they are  shrinking as they dry out. How do you make them? eg Do 
you bake them to dry them or use some kind of rapid drying agent.


       I have been making and using concrete tools exclusively for about ten 
years now and never had any problems.  I have so many in the shed now that I 
contemplated making a garden path with them, but are too shiny and slippery 
for that.


My method :- Put a piece or paper/plastic on the glass blank, make a dam 
around the edge with Duct tape or anything water proof.  Arrange your 
Stones/glass offcuts/tiles, then pour over your cement. Tap the edge of the 
class, vigorously, all round with a piece of wood  to remove air and make a 
nice smooth back. Then leave a day or two to dry.  After a year they Should 
be hard and ping like glass when tapped with a hammer. I use them time after 
time and they seem to last forever.

                               Cheers                       Malcolm.

 



-- 
Internal Virus Database is out-of-date.
Checked by AVG Free Edition.
Version: 7.1.394 / Virus Database: 268.8.0/353 - Release Date: 31/05/2006

_______________________________________________
ATM mailing list http://www.atmlist.net/