[Stoves] Fwd: Simple Modifications to Traditional Wood Cookstoves - Rocks and Clay Grates

[dr.adam]

Very strange the posting itself never shows up (also checked spam)however message: 
"Your message entitled   Re: [Stoves] Fwd: Simple Modifications to............
was successfully received by the Stoves mailing list."did show up....?Chris ADAM
 

    On Monday, April 29, 2019, 6:13:45 PM GMT+2, Andrew Heggie <aj.heggie at gmail.com> wrote:  
 
 Chris

It arrived and propagated to the list and is in the archive

Andrew

On Mon, 29 Apr 2019 at 09:18, dr.adam <scda2 at ymail.com> wrote:
>
> Repost 29.4.019:
> i posted this on 27.4 and i received a
> "Stoves post acknowledgement"
> However i never could see  my posting!?
>
> Chris ADAM
> --------------------
>
>
> "Danger of explosive spalling?"
> Dear Dave,
> i remember sitting as a child to open fire surrendered by heavy stones and the stones could give a "bang" in rare cases.
> But in the case of such a cement-stone element, a piece of cement would only (if at all) get loose from the inside of the cement-stone element.
> When casting the cement-top plate covering the fire box of
> an "adam-retort" kiln (www.biocoal.org)
> i never came to hear about such a "explosive spalling"
> best
> Chris ADAM
>
>
> On Thursday, April 25, 2019, 5:56:59 PM GMT+2, David Young <dyoung at pobox.com> wrote:
>
>
> On Wed, Apr 24, 2019 at 10:00:49PM -0600, Ronal Larson wrote:
> >    2.  After Kevin sent me 3 short videos a few days ago,  we agreed there could be great benefit to his and everybody’s stove research to get this early work out for discussion.  So this is to ask everyone to view Kevin’s annotated 2 minute video on an approach I have not previously seen:
> >    https://drive.google.com/file/d/1EJQEKKkMTQbcKn3kBC1YZ50oqtZPsbym/view <https://drive.google.com/file/d/1EJQEKKkMTQbcKn3kBC1YZ50oqtZPsbym/view>.
>
> Is the fire burning on a concrete slab?  It's my understanding that
> when a fire burns on ordinary concrete, there is a danger of explosive
> spalling, which can injure bystanders and spread fire around.  Consider
> insulating those flames from the concrete.
>
> Dave
>
> --
> David Young
> dyoung at pobox.com    Urbana, IL    (217) 721-9981
>
>
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