AirCrete

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  Read this before posting
  • Zander

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  aircrete vs. ferrocement
  aircrete ferrocement • • claudettn

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  @claudettn said: there is always the risk that the aircrete blocks are not done the right way and you have no way to test their quality... ASTM (pka American Society for Testing and Materials) has fully addressed aircrete, referring to it as Cellular Concrete.
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  Geopolymer Aircrete?
  • Moonrise

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  @Moonrise you bring up a very good point about the Portland cement and CO2 emitted in production. Its about a 1 to 1 ratio of 1 ton CO2 emitted per 1 ton produced due to the heating process and the amount of fossil fuel burned to do so. https://www.geopolymer.org/fichiers_pdf/GEOASH.pdf Check that link for information on a recipe (pg 4) that uses a less corrosive solution (Potassium Silicate solution) and cures at room temperature vs the alkali activated that needs some heat to cure if I'm not mistaken. Interesting to note that the compressive strength of the geopolymer cement in the paper is listed to be up to 95 kpa (much higher than traditional concrete). It also utilizes fly ash and slag which are waste products rather than the mostly mined raw materials Portland production uses.
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  Aircrete and earth-berming
  • Moonrise

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  @ignacio-dhome THANKS FOR THE REPLY!!!
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  Recycled Plastic in Aircrete Mixture
  • freeupfarmDM

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  @freeupfarmdm I would add something with more insulative qualities to keep the house cool longer... think of something airy like Styrofoam. I feel like the plastic in #aircrete would be just a place to store waste. I personally would want something that adds some sort of structural, insulative, or aesthetic benefit if I'm going to add it to my building material. Good idea though. Look into earthships and see how they use waste to their structures. It serves a building purpose... Goodluck!
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  best soap in Portugal
  • rui santos

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  @ignacio-dhome Thank you :)
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  Designing a Home using poured AirCrete for the walls
  • Jim Daubert

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  Not sure how these guys do it, but they are making awesome straight walls out of aircrete. This company uses the Little Dragon. I suspect they add sand to the mix. https://www.facebook.com/quickbricksvanuatu
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  Sodium lauryl sulfacetate ( SLSA ) any new results on this formula
  • longgrazz

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  @longgrazz jaja OK now I know the link you were talking about. Why you think is not working?
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  Making your own Foam Concentrate
  • algares

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  @longgrazz I don't know what formula/link you are talking about, but let me tell you that adding SLS to any soap will make it super ultra concentrated! Heat up your soap to 140F approx, add some SLS slowly and mix. 2 cups of soap just need like a teaspoon of SLS.
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  Aircrete for a wood-fired oven? Silly idea?
  • KCC703

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  @zander Sounds like you just made a crock pot! Any photos yet?!
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  Can you tell me what foaming agent can be used in Australia thanks
  • longgrazz

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  @longgrazz interested to see how you go.
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  USING AIRCRETE FOR DRIVEWAY
  • CHOISELAT1

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  @choiselat1 Did you do it? How did it turn out?
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  Troubleshooting Aircrete
  • Zander

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  Thanks Zander! Saving this one for future reference.
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  Best sosp in Mexico
  • Ignacio- DHOME

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  We used Seventh Generation Dish Liquid - no glycerin. Gabe and Hajjar don't ever use Dawn - I've never tried it. Your bricks look really nice - if you aren't using glycerin now, then I don't think you should start. It seems to me that you've got it figured out just fine.
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  Foam Recipe
  • anthonydjones

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  @atravis4 I inquired at my local agricultural COOP if they could get Drexel and how much it would cost. They said no but had something similar. So apparently they use the Drexel like product to mark where they have sprayed herbicides on a pasture to ensure everything gets sprayed. I read also the surfactant in it makes it stick to the plants better. The lady at the COOP said they referred to it as a marking agent. So maybe if you try to get some from Ag supply stores you could ask for the stuff that they use to mark where they have sprayed or the stuff they add to make the spray stick to the plants. I have checked several different Ag stores here and they give you a blank look when you ask about a foaming agent.
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  cracking of bricks
  • frakesfamilyfarm

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  Perhaps part of the problem is language - Since the article is in the UK the article is probably discussing Autoclaved aerated concrete (AAC), rather than Domegaia's form of AirCrete. The article mainly discusses the problems with using the wrong mix for mud and poor application techniques. Both problems are usually taken care of in a Domegaia type build.
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  Block thickness, dome diameter, Fabric Reinforement
  • anthonydjones

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  @zander Zander thanks for the info. This will have significant effect on my bottom line and let me build more. I greatly appreciate those of you who are posting actual experience. I hope to be joining you soon with detailed documentation of my build experience.
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  Marking foam vs Dawn
  • gemniii

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  I really like how your test containers are sealed off from the air. I think doing that more accurately simulates the environment of being encased in cement, sealed off from the air. Looks like a foaming agent with potential. The mfg recommends mixing at a rate of 5ml/500ml water (6.5oz/5gal water) for marking purposes. I also noticed this: WARNING: This product can expose you to chemicals including ethylene oxide, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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  Trying new Air Crete Gun
  • wlschenk

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  Hi, I'm new to aircrete and this forum; but I'm planning to build an semi-underground structure somewhat of a mix between an earthship and a dome and I think aircrete may be the best solution to all the requirements. I'd love to know how your home made mixer/thrower is going as I think something like that will be key... Many thanks
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  Foaming agent woes
  • Joeboy

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  @abra said in Foaming agent woes: We assumed it was because the bubbles popped. I think it would be correct to say that when aircrete loses volume it is caused by bubbles popping and the air escaping. What is more challenging is to say why the bubbles popped. I hear stories from very experienced aircrete makers about batches that collapse for reasons completely unknown to them. They thought they did everything like normal, but for some reason the bubbles collapsed. Then they simply try again and now it works. So it seems that there is some science to making aircrete, but there is also some art - some predictability, and some adventure. @Abra please take a look at my Aircrete Troubleshooting Guide to see if there is anything in there that might help you get the kind of results you are looking for.