Considering the current formulations (that I have read) require keeping water to a minimum in geopolymer mixtures, could someone explain to me the cons (possible pros?) of adding foam (like foamcrete) to produce a lighter weight final product with increased insulative properties and would maximize material usage . Considering the foam would be alkaline based the only change I can see would be the addition of moisture (chemically, molecularly) and air (as an additional aggregate). Would the entrainment of air as aggregate and the increase in moisture reduce the chemical bind significantly enough to reduce strength of the finished product to a impractical/ unstable/ unusable point? Would the addition of foam reduce surface area of bonding to make it structurally weak for any use? Please answer with an in depth chemical/ molecular explanation, both to satisfy my own quest for knowledge and for others to reference. Thanks in advance.
I was hoping that he would see it and be able to answer as best he can. I've never posted hear but I reference this forum quite often (for over ten years on RMHs) and read a bunch of Karl's posts and the paper on geoplymers and other stuff he has linked. I just stumbled onto it while looking into cheaper (or alternatives to) calcium aluminate mixes. I always appreciate any one's thoughtful input, but he does seem to be the most likely one to ask.
Thank you for the info Karl. I figured due to the fast setting nature of these geopolymers (it seems as though it's always fairly quick, especially with medium to high alumina content) that a generated foam as used in foamcrete would hold as well as it would in a portland mix. I am making a foam generator (for many reasons and uses, most importantly because I want to lol); as soon as that is completed and I try a few tests runs of geopolymer recipes, I'll start experimenting with foam. Any suggestions? Especially in areas of water content?
Secondly, would a sodium hydroxide/ fireclay mix be appropriate for the binder. I couldn't find anyone using it in the forums (only zeolite) even though the papers and posts have indicated it's use. If so what would be percentages?
Thirdly, I'm still unclear as to ratios to use (after the binder is prepped) and if I was using a foam, would a fireclay/calcium aluminate refractory be suitable, in place of grog, firebrick, earth, etc., to be used with the foam? Or will this all be experimental? I just don't know what ratio to start from, to save some time.
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 firstname.lastname@example.org..... the photos in this post did not show up
Apr 14, 2021 8:32:00 GMT -8