Cob: earth floors

Sun Nov 4 20:26:41 CST 2001

I accidently  posted to the senders rather than the cob list.  These are belated posts.
Steve

From: "SANCO Enterprises, LLC" <chansey at earthlink.net>
> Because we have had to have a self-leveling floor, we made our own
material.
> Here is the mix design
>
> fine sand (15% of dry cement component)
> 1 part gypsum (HydroCaL) or use a gypsum cement (DuraCal)
> 1 part slag cement (Blue Circle 120)
> Portland Cement (10% by wt of dry components)
> 1 part coarse masonry sand to 1 part of combined dry cement components
> Cement Plasticiser (1 to 2% of dry cement wt) use  Melment F-10 in fine
> white powder or Lomar D
> Thermoplastic Resin Powder (.05% by wt of dry cement component Airflex
> RP-224) this is optional.  It gives the surface a very hard clean finish
> Defoamer (.05% by wt of dry cement component  Foamaster PD#1 powder)
keeps
> air bubbles from forming

Paul - Wow!  that is the most complex and interesting mix design I've seen.
I don't even recognize half the ingredients.       If you have time, I'd
love to hear more,  including how you arrived at this and your approach to
measureing and mixing.   It would be an advanced education on
"whatevercrete"  design!   I'm all ears (or eyes). Do you take interns?
(kidding, I think).  Have a book?  (not kidding)

Steve

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<DIV><FONT face="Trebuchet MS" size=2><FONT size=3><EM><FONT size=1>I accidently 
 posted to the senders rather than the cob list.  These are belated 
posts.</FONT></EM>
<DIV><FONT face="Trebuchet MS" size=1><EM>Steve</EM></FONT></DIV>
<DIV><EM></EM> </DIV>
<DIV><EM></EM> </DIV>From: "SANCO Enterprises, LLC" <</FONT><A 
href="mailto:chansey at earthlink.net"><FONT 
size=3>chansey at earthlink.net</FONT></A><FONT size=3>><BR>> Because we have 
had to have a self-leveling floor, we made our own<BR>material.<BR>> Here is 
the mix design<BR>><BR>> fine sand (15% of dry cement component)<BR>> 1 
part gypsum (HydroCaL) or use a gypsum cement (DuraCal)<BR>> 1 part slag 
cement (Blue Circle 120)<BR>> Portland Cement (10% by wt of dry 
components)<BR>> 1 part coarse masonry sand to 1 part of combined dry cement 
components<BR>> Cement Plasticiser (1 to 2% of dry cement wt) use  
Melment F-10 in fine<BR>> white powder or Lomar D<BR>> Thermoplastic Resin 
Powder (.05% by wt of dry cement component Airflex<BR>> RP-224) this is 
optional.  It gives the surface a very hard clean finish<BR>> Defoamer 
(.05% by wt of dry cement component  Foamaster PD#1 
powder)<BR>keeps<BR>> air bubbles from forming<BR><BR></FONT></FONT><FONT 
face="Trebuchet MS" size=2><FONT size=3></FONT></FONT></DIV>
<DIV><FONT face="Trebuchet MS" size=2><FONT size=3><FONT 
size=2></FONT> </DIV>
<DIV><FONT size=2></FONT><BR>Paul - Wow!  that is the most complex and 
interesting mix design I've seen.<BR>I don't even recognize half the 
ingredients.       If you have time, I'd<BR>love 
to hear more,  including how you arrived at this and your approach 
to<BR>measureing and mixing.   It would be an advanced education 
on<BR>"whatevercrete"  design!   I'm all ears (or eyes). Do you 
take interns?<BR>(kidding, I think).  Have a book?  (not 
kidding)<BR><BR>Steve</FONT><BR></DIV></FONT></BODY></HTML>