[Stoves] Cuber and size of densifying machines. (no longer Re: The wood and char and fuel "debate" )

[Energies Naturals C.B.]

It is not the clay which makes the mixture waterproof.

Cowdung itself owns the property that once dried it will be water repellent.

Remember what happenes when it rains ontop of a dungflat which has dried superficially?

It forms a pond and holds the water! Below the dry grey surface there is the fresh green muck.

I also remember treading on them barefooted when I was a child and I can tell you that the muck was fresh!

Ther is some sort of colloid formed by cow's digestion, I heared, which once dry rarely dissolves, just like a modern water based paint.

Rolf


On Fri, 7 Mar 2014 16:00:44 -0500
Crispin Pembert-Pigott <crispinpigott at outlook.com> wrote:

> As I read the booklet at the time, there was no attempt at all to sterilise
> anything. They used the 'dung water' as it was.
> 
> The same approach is taken with smearing dung over mud walls to protect them
> from rain. Also all floors in traditional structures in Swaziland (and
> elsewhere I assume) have the same covering. It involves taking fresh dung,
> mixing in some mud and plastering by hand over the floor and up the walls.
> When dry it doesn't smell of anything.
> 
> The dung water-clay mix undergoes a chemical reaction I presume involves
> acid which is known to harden clay. 
> 
> There is a commercial clay process during which hard clay is softened with
> one additive (which makes it really soft), then mixed with ingredients for
> various purposes, then hardened with (I think very dilute hydrochloric
> acid).
> 
> The type of clay matters a lot but the guys found it in Uganda where the
> pamphlet was written.
> 
> Regards
> Crispin
> 
> ++++++
> 
> Crispin.
> What about  the bacteria resident in same petrie dish of concentrate ??
> Richard
> 
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Energies Naturals C.B. <energiesnaturals at gmx.de>