Post by coastalrocketeer on Oct 16, 2018 23:04:22 GMT -8
Second test mix is in the mold, with 30g acid activated bentonite(30g 5% vinegar activation), 15g crayola “air-dry” clay, 3g lye, 98.5g H2O, including the vinegar’s water, 20g Red Devil TSP90/sodium metasilicate/ solid waterglass(for roughly 200g/l concentration), and 5g cement as accelerator, and 53.6 g (volume of my mold) of carbon bread foam aggregate.
This is definitely an LTGS mix, with the carbon foam as aggregate, not “flowable under vibration”, even with a “soft mayonnaise consistency” (high water) binder. I have to “tamp it” into the mold, the bread foam is softer than perlite, and needs to be tamped in at about 1/2” thick or the top layers of CBF aggregate just crush, instead of moving what ‘s below... I found “slapping it” with a silicone spatula and using the tip to push the corners and edges down to fill them in worked well, but for my 1” deep mold I should have done so in a couple of layers.
I didn’t pack the bottom of the mold as nicely as I would have liked, but would have run short at the top if I had, so in future mixes, I will add an extra tablespoon or two of carbon foam so I can pack it in a bit more and not run short.
One thing I like about this mix for a castable, is it seems to have nearly ZERO drying shrinkage up to this stage. Will be interesting to see what happens to it when I put it on top of the rocket core riser flame path and fire it up to a MUCH higher temp.
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