that they can personally test and prove the longevity of the product, product combinations to exceed one year ! This needs to result in a stable product that can be built by D.I.Y.ers
and give good repeatable results. Price (at Volume) will be important too!
All This is on top of all the other 'spinning plates they have up in the air ' , - 24/7/365 - !
I would like to see a lot of people sign in here and leave comments , this should be a ''HOT TOPIC ''! PYRO Magic-ally Allen L. be safe keep warm !
David Graber wrote:diatomaceous earth (bentonite)
ahhh....i'm pretty sure these are two different things:
Diatomaceous Earth, or silicon dioxide, is very specific. It is made from the skeletons of the smallest creatures on earth, of creatures that have skeletons-- diatoms. It's sold as a bug killer, slug repellant, desiccant, pool filter coating/medium, and a mortar additive. The cheapest way to purchase it is as 'food grade diatomaceous earth' at a local pool supply place, or as 'sharp sand' from a masonry supplier.
It doesn't really do that good of a good job holding substrate (perlite) together since it is also considered a substrate itself. You would have to get it really really really hot to actually fuse.
Bentonite, is quite a general term for clay that is dug out of the ground from many different regions and may contain any number of different elements. The cheapest way to purchase this is as generic, grocery store brand, unscented clay cat litter.
It's much 'stickier' than DE and will do a great job of holding all kinds of substrates together-- fired or unfired... but it usually contains a lot of organic material and can't take the heat that DE can.
Do you possibly mean that you mixed the two?
and perlite, mixed per the Wisner's new info
ahh...what info would that be?
For experiment, I crammed some of the stiff mix into a brick let it dry
first of all: what mix? 1:1? 2:1? 9:1?
second: dry for how long?
and left in in my existing RMH firebox where it's hottest. Out came a cute very light brick, really quite strong.
If you did use just DE and perlite, how the heck did your cute little brick hold together? how long did you 'fire' it? you mean to tell me that you got this little brick hot enough to fuse the silicon of the DE into a matrix around the perlite? how much did it shrink?
I'm a bit unclear on your methods and results...
...could you elaborate?
I seriously hope you don't take my picking on this point the wrong way. I'm just trying to prevent future confusion. Mistakenly mixing DE and perlite for an RMH and expecting it to hold together could have disastrous results.
I am going down to the lab. Do NOT let anyone in. Not even this tiny ad:
five days of natural building (wofati and cob) and rocket cooktop oct 8-12, 2018https://permies.com/t/92034/permaculture-projects/days-natural-building-wofati-cob