I am designing a Nubian arch aircrete modular dome system. I have very limited resources so I came up with a design which lets me build a "room" to live in and then add "rooms" as needed. I have a solid modeling program which lets me build an exact model and it gives me total cubic inches and other info. I made a spreadsheet using all the data I could glean from the DomeGaia sight and I get this
0_1512618013986_upload-05b229f1-6289-4df3-aee3-932a5f5fe192 Cubic '' Cubic Feet "Bags of
Portland (94lbs) " "Water
gallons per Bag Portland" Price
5.5 7 $10.03
5.5 Foundation 183504.8492 106.2 19 135 $193.66
5.5 Floor 140853.8957 81.5 15 104 $148.65
5.5 Entrance/Shell 814940.051 471.6 86 600 $860.04
Stucco Finish 0.0 0 0 $-
120 839 $1,202.35
This is just the Portland cost. I have not figured out how far the Drexel or Dawn dish soap goes.
Air Crete is porous and will absorb water so you would have to finish the surface. Due to the low tensile strength of aircrete you would have to add a lot of rebar or better yet fibers if you want an above ground tank. I have not tested it for water retention on its own but am building a turtle pond that will be finished with a tadelakt (lime based) top coat.
No it is not up to code in the US. In order to get it up to code you would need to talk to an engineer. maybe do a small scale test build before he will his stamp of approval on it, before you can build in the USA.
Inflatable form is the least labor intensive way to go i believe.
To test if the air-crete stands up to the height, Use a form as high as the top of the construction, 16 Ft in your case, for example a box of 4" square and pour the test mix in this. Test the bottom but the same way you test the top bit and you know the difference.
glad to read your post. I'm currently in Kona. Till 16 Oct. Will be in Kauai for a few days after that. I have 8.2 Acres in San Diego County. I can provide space for workshops in San Diego. I have 30+ years of construction experience. Love to meet with you while I'm among the islands.
I am building 21' dia. Nubian domes. Think the shape of the large half of an egg. 4" thick blocks, fabric wrap with earth plaster inside. Probably 6"x6". I would really like a form which created the horz/vert angles but since I received the Aircrete "mortar" formula just using square cut blocks as shown by dome Gaia might work as well. My thought is that if I have the angles I would use less material. I will be documenting all of my procedure so anyone helping can benefit as well. I suppose it will end up being cost/benefit. I know there are some smart innovative souls in the forum. So throw out some ideas for all to tweak.
Hello, We have not yet tested our domes through a long winter. However, the insulation properties of AirCrete are very good for cold climates. Please read more about 'AirCrete's R-value' at http://www.domegaia.com/faq.html (bottom of the page). Aloha!
Hi Mike, Thank you so much for your interest in Domegaia! We are still very much in the growing stage and intend to offer more detailed online trainings and design plans, as you mentioned. There is a growing need and we are working towards fulfilling this need! In the meantime, we do offer 10-day workshops where you are equipped with the knowledge and hands-on learning to build a dome. If you are interested, learn more about our upcoming workshops at http://www.domegaia.com/upcoming-workshops.html. Aloha!
Haremos lo posible por estar en el de Oaxaca, pero no podríaos ir más de 2 o 3 personas y como los daños en nuestras comunidades son muchos y muy dispersos geográficamente, quisiéramos que alguien que conozca la técnica constructiva que utilizan pudiera venir a la región, al sur oriente de la Ciudad de México, y en un plazo más corto, es decir en el mes de octubre si fuera posible. Hay miles de personas sin techo y debemos apresurar en lo posible la reconstrucción, si no fuera posible convencer pronto a la gente de usar su técnica, seguramente empezarán a reconstruir con sus formas acostumbradas.
Estamos ofreciendo otro taller en Kauai, Hawaii en octubre y no estará en México hasta diciembre. Esperamos ayudar donde podamos.
I did not get any training from anyone. I did buy the video from monolithic dome on how to build a dome. And are working on a new way of building a dome. That is why I did a small scale dome test first. I will be using a 40 foot dome air form. There will be two layers for water proofing the first is latex cement additive in the structural layer, the second is a water poof stucco over the aircrete.