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Re: [ATM] portland cement; grind. etc.
Repost: (sorry dune kept sending it to you)
Look at QUIKRETE Non-Shrink Precision Grout
http://www.quikrete.com/catalog/Non-ShrinkPrecisionGrout.html
I use it for telescope piers, filling machine tool bases and making concrete
counter tops.
If you have a vacuum pump then pull a vacuum on it and let it foam up on the
top. When the foam breaks you can remove the vacuum OR you can pressurize with
CO2 to say 15 or 20 PSI. The CO2 will cause the Portland cement to cure in a few
days and will be very HARD and non-porous.
For an instant cure, the CO2 needs to be pressurized to 250 PSI, this is called
Supercritical CO2 Carbonation. The cure will be complete in a few minutes no
matter what the thickness. Yep that's right; something that would take centuries
to cure will cure in minutes.
http://www.pnl.gov/er_news/08_97/ws.htm
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