The compressive strength of an 2 foot by 3.5 inch section is stronger than 2x4 framing. My last test showed a strength exceeding 19,500 pounds for such a cross section. This of course doesn't take into account the tensile stresses, the fabrics stretch strength, or uneven loading of the wall.
We are building a done with a second floor. However the floor will be supported on the walls. I aircrete can support the weight. It's the thermal expansion and contractions that could break up the dome. The floor would move at different rates. Perhaps expansion joints could be designed in, but why not skip that problem all together?
Some people carve out the wall and place inside wall then they fill in the gap wit aircrete or aircrete mortar.
I personally place all the plugs in the floor. I stub pipe to run wires into cabinets and walls. I run the electric up to the lights via interior walls and use the snap on electric wire rails. Bathroom and living rooms get a motion switch mounted on the lights. I don't like to weaken the structure.
Using Aircrete would seem a very expensive way to go. Why not use earth in the earth bags? It's relatively cheap if not free. You might save a litle labor but I am prety sure the bags will leek. Even so experimentation is good. We never know when a project might need something like that.
Exactly 🙂 it helps if they can be just shy of your intended batch volume. The blocks I have been making are about 14.5x16. There is no reason for them being this size other than it works out evenly in my form. I used the flat metal cookie cutter method for a while but have since moved to using the same hand powered wood saw I trim fit the blocks with. With the flat metal method the blocks were cracking when removing the blade
I can’t say for completed domes, but the one I’m building is going thru hundereds of small quakes a day right now. Yesterday we had a 6.9 and a 6.0. My dome is only 3/4 of the way built and has no reinforcing mesh installed at this time but suffered zero damage. I would think that a completed dome would be more resistant than one in the state mine is in.
Results will vary, just sharing my experience and will update as things change. This series of quakes most likely will continue for quite some time as the volcano we live on has been changing rapidly.
@kimo Orchidland is a great spot, nice choice. Great advice! As long as I’m grandfathered in to those rules, I’d be ok with suddenly being told I can’t live in those structures as long as I didn’t have to tear the investment down. Thanks again! Appreciate it🤗
Exciting to hear your enthusiasm for aircrete and the dome building process! I just finished a builders certification with the good people at Domegaia and might have some input for you. Email e at firstname.lastname@example.org and I can give you my input at least.
AirCrete has good tensile strength but little tensile strength
"AirCrete has good tensile strength but little tensile strength", typo? Do you have any measured data on your recipe? I'm new on this site, but as someone else already pointed out isn't AirCrete a trademark from an European company?http://www.aircrete-europe.com/en/contact.html)
Never mind guys as I see the ingredient quantities is for different sized units. The imperial measurements are for a ft3 size while the metric ones are for a m3 size. There are about 35.3 ft3 to a M3 so it's just a bit confusing when you look at it in this format.
I have spoken to the president of Airkrete wall insulation where they use Magnesium Oxide cement. I tried to make a portland based foam concrete as stiff as shaving creme to use as insulation but was unsuccessful. It is always a very runny mixture. I am interested what your results were with the Magnesium Oxide Cement and did you have a mixture that could be used to fill a wall cavity for insulation? Where did you buy the Magnesium Cement and how much did it cost? Thanks