AirCrete

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  Drexel Foam Density
  • FL_Eric_T  

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  Correction, Tomorrow I'm going to try a mix of 180 to 1 and if time allows one at 140 to 1 with air set @90 PSI.
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  Concrete floor
  • EnglishChris  

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  Thanks for that, Iggy. I'll try pouring a test section first. I'm filling the chasings for wiring and plumbing at the moment, using regular mortar because I can't get aircrete mortar to stay on vertical surfaces unless I let it sit for 5 or 6 hours before using it. It may have something to do with the cold and damp, here. Do you know a way of making it firmer?
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  Offering free labour in New Mexico
  • solona  

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  Widely differing formulas
  • JRatner  

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  Slab Floor Recipe
  • Traveler004  

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  Using large tile on an aircrete slab shouldn't crack if the underlying soil isn't expansive clay or unstable and/or not properly compacted. When tile cracks on concrete it is usually because the ground underneath has moved and buckled the slab.
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  New build in Africa
  • kalikrete  

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  @rhinoscout Yes I was thinking something like burlap would do if it ends up plastered over with the aircrete bonding coat it should be protected from the elements anyway. Cheers
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  Foaming Agent and Formula
  • JRatner  

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  @JRatner Stable Air has made that decision a business decision. Foam is easy!! What the difficulty is using the foam for residential home construction.
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  ICFs. Legos
  legos reinforcement icf forms • • rhinoscout  

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  Aircrete appropriate for a Mexican sweat lodge?
  • Rufus  

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  @Rufus I have the same question. I would say that it's non toxic. The water is the concern though it may just breathe and dry out. Otherwise, a "climate active" product would probably be the best coating inside and out.
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  Building permit ever issued for an aircrete home in the U.S.?
  • Altitude High  

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  @upwinger Brilliant idea!!!
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  Aircrete under water
  • fergus4  

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  Aircrete
  • noni  

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  Making aircrete to meet code...
  • Ignacio- DHOME  

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  Right now we are experimenting with laying out the rebar cage concept, and developing the block mould/form to be on the rebar cage. Since the blocks are made from a liquid, it can be poured into the rig, and then the thing unlatched and moved to the next station. Problem probably keeping the crete trapped in the form as it goes more horizontal. I am uncertain of how fresh poured aircrete will bond to existing dried aircrete. The other variable, is what exactly a municipal dept. requires of an engineered aircrete dome system like the monolithic. Once the code is cracked and one engineer stamps a plan and it is approved by some muniicipal fiefdom somewhere, it can be replicated. Open source sharing of knowledge and skills & kith/kindred is the key to liberating the serf from the oligarchs. Eventually the concept will bear fruit, and an Engineer will tackle it. I know of one, but it has to be done and proved first. One of these structures will need to be run through some software like ANSYS and destructive tested. https://www.ijirset.com/upload/2017/may/156_Numerical.pdf Basalt rods are the desired structural reinf material, but steel rebar is easy to score in any metroplex or lumber store. So far ive tinkered with holes in blocks and threading the blocks on the bars. Misery. not worth the effort. Works on a flat plane, but that radial dome curve is "special". The genius of the dome and aircrete is that it doesnt need all the engineering and reinf. bars as the laminated crete between fabric is the key.
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  Collapsing forms remedy- warm water
  • Ignacio- DHOME  

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  @Carolebrdn yes! Try using hot water in the foam mix. This is what we did at the Pt Townsend workshop and it seemed to have success. They had trouble later keeping the water warm, so I think they got an electric water heater like the link below to keep the foam mix warm. You could also keep the foam mix circulating by using the little dragon without any air on and just putting the outlet of the pump back into the top of the barrel. This circulation generates some heat in the foam mix from friction in the movement. Farm Innovators Model H-419 Ice Chaser Cast Aluminum Submergible Tank De-Icer, 1,500-Watt https://www.amazon.com/dp/B000HHO9LC/ref=cm_sw_r_cp_apa_i_DXbZDbTD8S5Q6
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  Big island sand source
  • vitusthemad  

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  Help!
  • daniellefiroozi  

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  @Ignacio-DHOME thanks Ignacio!
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  Drexel FM 160
  • Homer  

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  @anthonydjones thanks, try to contact them next week
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  pouring floor: in sections? Dry sticking to wet?
  • Traveler004  

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  Traveler, I too have been mixing in a 50gal drum with the hand mixer and found it a lot of work for my 67year old body. What I found was that, for me, the hardest part was getting a thorough mixing of the cement and water only, to be the most demanding. It was hard to get all the cement mixed into the 'slurry', with no or little residue/paste on the bottom of the barrel after I poured it out. (especially since I was doing this myself) What I was thinking, was that mixing the cement in a barrel mixer, assuring that it was well mixed, then pouring that slurry into my 50-gallon drum and adding the foam at that point. I'm new to this and have only done a few test batches, but my first test batches raised concerns with me since in the future I want to add sand 1:1 for a slab and can only imagine it getting more difficult. I guess the next best thing would be to find a 'younger' helper :-) Your thoughts would be welcome. Aloha, Jim
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  Autoclaved vs non-Autoclaved
  • Traveler004  

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  Foamcrete walls anyone?
  • noni  

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  @little-pig-store Fiberglass mesh looks amazing. But the cost here would be 10 bucks for a 2x3 foot panel :( But I know cement sticks to glass just like rock. where it doesn't stick to organic materials like wood and it doesn't stick to plastic so i'm not sure why polyester material is working for people. I have not tried it. I'm trying to use pink fiberglass bats because i have them. So far it sticks but i've not found a way to mix it in. I just gums up my mixer. Have you looked into or tried calcium aluminate cement?