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  • RE: La Ventana

    @fire Earthbag construction is so labor intensive but not as labor intensive as packing tires. I personally am going with the Monolithic Dome airforms. You could make your own airforms I have not done so myself, but i visited a home in CO where the home owners made the airforms. On there website they sell a book on how to make airforms.

    Here is a video I made of the home i visited and I have a link in the description to the website with the book.

    Good luck.

    Youtube Video

    posted in General Discussion
  • RE: Need help in buying an air compressor posted in Tools & Equipment
  • RE: aircrete vs. ferrocement

    You are right in what you are saying. You should try to build according to your code if you are building in a code requirement area, which is virtually most of the USA now. Regardless what other people might try to imply, testing is neither difficult or expensive. You can test the strenght of your aircrete or regular concrete and is around maybe 100 dollars for sampling, which includes about 5 cylinder samples. When I did mine, they were around 75 per 5 cylinder sample, and that included the technician going to the site and gathering the sample before the pour, and doing a test ON the concrete that was going to be poured to predict if it would possibly pass the PSI of concrete ordered. You could collect your own samples, as the cylinders are readily available, and then bring them to any engineering testing firm and that would save you money. Aircrete, or what they want to call aircrete in this page is in reality cellular concrete. This have been discussed before in this forum. Real aircrete expansion is by a chemical ( using aluminum powders) mean and then you need an autoclave to hot cure it for hours, which give ultimate tensile strenght. Domegaia concrete is not commercial aircrete but cellular concrete. Its strenght in compression is good, but its tensile strenght not so much, so you would need something to give that strenght. It could be rebar , metal lath or even better basalt rebar, which is expensive but is mineral and have higher tensile strenght than metal. You could also consider a thin layer of magnesium concrete, which is much stronger than any other concrete and can be laid out thin, but it is expensive, and then over that layer put basalt rebar and then aircrete. Many ways to do it, but the cellular concrete by itself is not too strong by itself for a building that needs coding. Minimum compression strengh of a concrete building in most codes is 1500 psi for walls and 2500 for a concrete rebar ceiling. PSI in the hundreds for a building is not much different than mortered foam blocks. The ideal would be a middle point, using the magnesium concrete and basalt rebar to hold the tensile strengh, and the celular concrete to give insulation. There is also basalt fiber that is sold in mats or just the fibers. That could also be added to celular concrete for even more insulation. Even another solution would be to buy a concrete inflatable dome cheap in alibaba from a chinese suppliers. They use them for fairs and displays. Then use that filled with air as a holding structure, and using regular concrete by hand in a thin layer, or maybe shotcrete or gunite and rebar. This will also give you a stronger shell that can be worked over with celular concrete. Then at the end good coating of sealing paint to make it weatherproof. Whichever way you choose good luck.

    posted in AirCrete
  • RE: Zander steps down from office

    :( Dam you will be missed bro.

    posted in General Discussion
  • RE: Zander steps down from office

    By.
    You've been a great forum facilitator.
    Y'all come back now!

    posted in General Discussion
  • Zander steps down from office

    It is with great pleasure that I have been such an active member/moderator/facilitator for this noble forum. It has been an awesome learning experience. Six months ago the lava flow pushed me out of my dreamy cabin overlooking the sea and into the role of Domegaia Production Manager. It has been a rewarding ride personally and professionally. For entirely personal reasons I am moving off the island, and off the grid until further notice. Hajjar, Gabe, Rafa and the entire Domegaia team have been good to me and fun to work with. Further I can say that the Domegaia clientele and forum members are a stellar group. It has been a pleasure working with all of you. Until we meet again. Above Majestic.

    posted in General Discussion
  • RE: Average Cost Per Sqft

    @ignacio-dhome I'm glad you found it useful.

    posted in General Discussion
  • RE: Rocket Mass Heaters

    According the rocket mass heater theory as I understand it, the best place and time to get power for your system is the riser itself. The force of movement generated in the riser will draw in the fresh oxygenated air and push out the exhaust. After the exhaust gas has cooled, it is considered counterproductive to direct it upward against gravity. The power of the riser is significantly increased by every inch of its height and by each additional 100ºF. The more power a riser produces, the longer it's horizontal exhaust can be, the more heat can be extracted into the mass.

    posted in General Discussion
  • RE: aircrete vs. ferrocement

    @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.

    posted in AirCrete
  • RE: Rocket Mass Heaters

    In my opinion, the goals with a rocket mass heater are to:

    • Extract as much heat energy as possible from the fuel
    • Release the cleanest exhaust possible
    • Store as much of that heat in the home as possible

    These goals can be realistically achieved in the upper 90th percentiles using known techniques as established by CobCottage and others. Releasing clean exhaust is a BIG deal when living in a tight village setting.

    posted in General Discussion