I found this searching on info on bentonite in geopolymers, and it also mentioned zeolite. Interesting microstructural analysis. Am not using fly ash, so maybe not directly useful, but perhaps some additional info to be gleaned.
Post by Karl playing with geopolymers on Jan 23, 2018 7:02:06 GMT -8
The addition of a few percent organic acids increases the reactivity of minerals with phosphoric acid by a multiple. Contrary to lye based geopolymers no pretreatment with the acid is required, just add the organic acid to the phosphoric acid. Particularly suitable for the geopolymerization by phosphoric acid are minerals with a high content of metal oxides. The strongest reactivity is shown by mafic (alkaline) and ultramafic minerals and minerals with high content of potassium oxide. In my experiments, Nepheline Syenite showed the strongest reactivity, probably because of the high grinding fineness of 400 mesh.
Post by esbjornaneer on Jan 29, 2018 0:29:25 GMT -8
Here are some articles Karl playing with geopolymers suggestes when I asked him about: 1 The percentage of binder to aggregate. 2 The aggregate mixed with the binder. 3 The quantity of water added to the mix. 4 Different materials in the binder.
and their affects on the finished piece of LTGS with regards to
i. ability to cope with heat, ii. insulation value, iii. surface hardness (abration/dent resistance), iv. and ability to span a void (like the roof of a large fire box). v. any other properties that change as a result of altering either one of 1-4
Post by coastalrocketeer on Nov 25, 2018 23:25:44 GMT -8
Interesting papers on geopolymers in the Egyptian pyramids... makes perfect sense to me that the main mass of the pyramids would be quarried stone, and the smooth outer facing was cast in place geopolymer, using the crushed powders/fines and aggregate sized materials of that or other regional stone quarrying. Second paper shows some pretty convincing (to me) photographic evidence of such construction.
And I presume acids and alkaline (potash solutions) could allow softer tools with grit to make some of the ‘machine marks” seen in other places that indicate large disc shaped cutting wheels were used on some work. Could have also softened surface layers for bronze chisel work (leave clump of wet ash overnight, where you want to chisel tomorrow and remove a decent amount of granite with a soft tool the next day... polish with wooden tools and sand as grit using similar softening agents? Definitely some sort of lost technologies going on, and interesting.
I am fairly convinced that a lot of the Central and South American megalithic stone work was also made with a combination of geopolymers and “stone-softening” techniques.
PREFACE TO THE 3rd EDITION. Not even a year has passed since a new edition of our “Production technical and chemical formulation” was needed. In this new, number three, edition, edited by prof. A. A. Kalachev, included many new recipes and production tips. There is one more small innovation. Proportions in most cases are translated into parts by weight, and only in cases where it was more convenient, they remained in grams. Due to space savings, the weight parts are indicated only by numbers without the letter h, which must be borne in mind when using the book. G. G. Brodersen. Leningrad, 1930
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
Aug 20, 2019 18:41:48 GMT -8
mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
Aug 23, 2019 13:33:44 GMT -8
topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8
anounaki: Hi, why I cant upload photos when I make new tread to this forum?
Feb 28, 2020 2:09:40 GMT -8
ahansen: photos under 1 mb not possible?
Jun 4, 2020 0:09:21 GMT -8
belgiangulch: Photo's are possible. They must be downloaded elsewhere and the image url (adress) is copyied.
Sept 14, 2020 7:26:15 GMT -8
belgiangulch: While creating a thread click on the small picture in the banner above the reply. A box pops up, paste the image url in the box. Pay no attention to the huge list of numbers and such.When you finish and hit reply your post with pictures will come up.
Sept 14, 2020 7:29:27 GMT -8
deadstarsstillburn: Hi there. I was directed this way by folks on the Permies.com website and am hoping I can get some information on how a total newbie can get started designing, siting, building, and not-dying-in-a-horrible-house-fire with a new RMH in a 160-year old home
Oct 21, 2020 6:52:10 GMT -8
deadstarsstillburn: The people over there recommended either a 6" batchbox or an 8" J-tube. I don't know what those are but am going to try to figure that out. What I need is a blueprint that I can scale to fit the need for my house. I have something likne 5000 square feet
Oct 21, 2020 6:53:00 GMT -8
deadstarsstillburn: but I do not need to heat all of it by any means. probably only need to heat half of that, maybe less.
Oct 21, 2020 6:53:15 GMT -8
deadstarsstillburn: moreover, the house has 3 storeys (large attic) so I assume if I get very efficient heating on the ground floor, that will go a long way toward heating the upstairs as well, no?
Oct 21, 2020 6:53:59 GMT -8
BenAlexanderT: Happy new year everybody. I wish you the best
Dec 31, 2020 15:06:14 GMT -8
Solomon: Anybody in Southern Oregon, in Jackson or Josephine counties?
Jan 16, 2021 21:54:43 GMT -8
gnomedome: i realsie this is from 2009
Apr 14, 2021 8:30:44 GMT -8
gnomedome: i realize this is from 2009 id love to see the photos from this ..as im looking to build a sauna soon similar to this .... if anyody sees this post email@example.com..... the photos in this post did not show up
Apr 14, 2021 8:32:00 GMT -8