I too have given up on boric acid in search of a cost effective
formula. This is my current mix that I've been impressed with its
rapid dry time and strength. If I had access to tons of local clay
I'd switch over to Mr. Merrill's mix.
60lbs paper
30lbs dry sand
20lbs Portland cement
5lbs slacked lime
On Dec 4, 2007, at 7:52 PM, Robert Merrill wrote:
>
> Hi Eric;
>
> As you know I have been working on F/C formulas for a day or two.
> I do
> not recommend the use of Borax. The following formula has been in
> use by
> me for over five years and has some excellant qualities. It is the
> most
> durable, and cost effective formula that meets the need for low to
> non-existent shrinkage with super adhesion characteristics. By dry
> weight: 60# fibre; 10# prtld'; 10# lime; 10# clay; 10# sand. Mix in
> that
> order by adding the binders to the emulsified fibre. It will prduce a
> light-weight, highly insulative, fire resistent, easily sprayed
> material.
>
> Best Wishes Bob
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
-Mikey
http://greenacre-hotsprings.blogspot.com
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