I used a mixture of 2 parts silica sand; 2 parts Koalin, 1 part
portland cement, small amount of nylon fiber and small amount of Q
cells. I used latex as activator for the concrete. I had quite a bit
more shinkage than I thought I would get. I mixed ingrediaents and then
poured. Should I have waited to pour until concrete started to set up?
Should I alsways expect shinkage? What can I do to minimise it?
Thanks for any help.

"ContreteArtist" wrote in message
oups.com...
I used a mixture of 2 parts silica sand; 2 parts Koalin, 1 part
portland cement, small amount of nylon fiber and small amount of Q
cells. I used latex as activator for the concrete. I had quite a bit
more shinkage than I thought I would get. I mixed ingrediaents and then
poured. Should I have waited to pour until concrete started to set up?
Should I alsways expect shinkage? What can I do to minimise it?
Thanks for any help.

Hmmm, I thought concrete had less shrinkage than cocobolo. Maybe not. I'm
not sure how this is related to woodworking.

Use less water.

Dave
ContreteArtist wrote:

I used a mixture of 2 parts silica sand; 2 parts Koalin, 1 part
portland cement, small amount of nylon fiber and small amount of Q
cells. I used latex as activator for the concrete. I had quite a bit
more shinkage than I thought I would get. I mixed ingrediaents and then
poured. Should I have waited to pour until concrete started to set up?
Should I alsways expect shinkage? What can I do to minimise it?
Thanks for any help.

In article .com,
ContreteArtist wrote:

Should I alsways expect shinkage? What can I do to minimise it?

Stop swimming in cold water.

It's already minimized.

--
~ Stay Calm... Be Brave... Wait for the Signs ~
------------------------------------------------------
One site: http://www.balderstone.ca
The other site, with ww linkshttp://www.woodenwabbits.com

ContreteArtist wrote:
I used a mixture of 2 parts silica sand; 2 parts Koalin, 1 part
portland cement, small amount of nylon fiber and small amount of Q
cells. I used latex as activator for the concrete. I had quite a bit
more shinkage than I thought I would get. I mixed ingrediaents and then
poured. Should I have waited to pour until concrete started to set up?
Should I alsways expect shinkage? What can I do to minimise it?
Thanks for any help.

Add some sawdust. It will swell to counteract the concrete shrinkage.

--
Gerald Ross
Cochran, GA

Everybody has a right to be stupid,
but some abuse the privilege.





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On Fri, 24 Jun 2005 23:59:56 -0600, Dave Balderstone
wrote:

In article .com,
ContreteArtist wrote:

Should I alsways expect shinkage? What can I do to minimise it?

Stop swimming in cold water.

It's already minimized.

"It shrinks?"

"Like a scared turtle."

"I don't know how you guys walk around with those things."

Oops. Sorry. Wrong newsgroup.

--
LRod

Master Woodbutcher and seasoned termite

Shamelessly whoring my website since 1999

http://www.woodbutcher.net

Proud participant of rec.woodworking since February, 1997

Billy Bob,
As the concrete cures, water evaporates out. This is part of the
shrinkage. Less water means less shrinkage. Stiffer conctrete requires
vibration and or more working to get all of the voids out. There are a
number of additives that can be used. One is called Recover. I used it
a lot when pouring counter tops. Others are called 'plasticizers'. They
allow the concrete to act like it has more water in it than it really
does. The down side to these is that it tends to give the conctete a
texture like silly putty, and makes it harder to work. Concrete will
shrink and expand with temperature changes. On smaller slabe this isn't
significant. On the Golden Gate Bridge, this can mean elevation changes
of 5 or so feet during the day.
robo hippy



















Gerald Ross wrote:
ContreteArtist wrote:
I used a mixture of 2 parts silica sand; 2 parts Koalin, 1 part
portland cement, small amount of nylon fiber and small amount of Q
cells. I used latex as activator for the concrete. I had quite a bit
more shinkage than I thought I would get. I mixed ingrediaents and then
poured. Should I have waited to pour until concrete started to set up?
Should I alsways expect shinkage? What can I do to minimise it?
Thanks for any help.

Add some sawdust. It will swell to counteract the concrete shrinkage.

--
Gerald Ross
Cochran, GA

Everybody has a right to be stupid,
but some abuse the privilege.





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