I'm trying to select an air compressor to buy for home use. This is my first time buying a compressor, as I've never used anything other than my dad's old belt driven monster with something like a 400 gallon tank.
While we haven't pumped vertically, we've successfully pumped horizontally by making our aircrete mixing container air-tight, then pressurizing the top with an air compressor so that the mix would flow through a hose attached at the bottom. Doing so seemed to have little effect on the foam, which set fine under the concrete slab we filled beneath.
I hope to get some foam technology advice here as to how to fine tune the foam density recipe.
I used two 5 gallon buckets, one stacked inside the other. The whole kit fits inside the top bucket for storage and transporting.
I had to change the inside of the whole house filter with a 1" piece of pvc pipe cut to the length of a filter and I drilled a whole bunch of little holes at the bottom of the pipe to direct the foam up to the outlet.
I stuffed it full of stainless steel wool around the pipe and a wad of it up in the filter housing top, where I drilled and tapped a fitting for the air inlet. There was already a water pressure relief valve there.
The pump is a 12 volt sealess marine coolant pump made by Johnson.
I was getting consistent ~70g/L foam at about 20 psi air pressure , consistent ~50g/L at 25 psi, and consistent ~110g/L at about 15 psi. I could not get it right at 90g/L.
This is just cheapo Kirkland brand Costco dish soap for testing purposes only. I mixed it at 2 cups per 5 Gallons H2O.
I consider this experiment a total success. Now my question for you experienced with foam generating, is what effect does using less soap in the water have? If my foam is too light at 25 psi, will using less soap in the water make it heavier??
That was with 50psi air pressure. I think I need to stuff more ss pads into it https://photos.app.goo.gl/zHxgcADfLUCQXJTS8
The pump is a Johnson 28watt 12volt sealess 22.5L/min
It fits perfectly at the bottom when you put the 2 buckets together.
Domegaia provides a great bit of information and inspirational ideas for building a cost effective, low maintenance, practically indestructible by nature haven/home and I thank them for that.
Comparatively, yes, the ecological impact of an aircrete home is much less than the traditional North American home with all the toxic materials used. (eg: asphalt shingles, vinyl siding, other plastics, insulation, paints, stains, other manufactured materials, etc...) Domegaia has provided a better alternative but, not a true environmentally friendly option either, as they seem to tout. Take your time and understand where "cement powder" comes from. Please. Before you choose this option. With that said, I am a true fan of the cost, the time, labour, low maintenance, and the benefits to the environment that this option does offer.
Personally, I would be much happier if Domegaia could/would have provide(d) some other ideas rather than commercially sourced cement powder, an organic fabric option rather the polyester fabric, and a more organic option than a latex bonding agent. I would then call this a truly eco-friendly option. Sorry for the strange rant. lol.
Having been inspired by Domegaia, I went ahead and purchased a number of their products offered in their online store. I now have the Little Dragon, the mixer and foam injector, (none of which I've had the use yet) and I also purchased their digital student hand book.
The Little Dragon DIY kit came as advertised but does not come with pvc glue and for the price they charge, it should be included, in my opinion. The paper instructions are fairly different from the video assembly tutorial. I used both. It looks great when finished and I expect will run without a hitch. The convenience of the kit was great but, I probably should have sourced the parts myself and I have saved a good amount of money. More time and effort though. It would be a trade off.
The other cost prohibitive factors were the shipping and customs fees as I'm in eastern Canada. The tax and duty from customs for the two separate shipments required for the mixer and the Little Dragon cost me over $150cad plus the shipping costs. With the taxes and duty I should never ever have bought their mixer. I could have found one of equal or better quality in my local hardware store. The mixing wand appears to be great quality and strength (although hand built likely rather than machined precision) compared to other of the same size I have seen elsewhere.
The student handbook, is way over priced and most of the information provided can be found, for free, on Domegaia's own website, forums, and videos. The floor plans that come with it are great for inspiration but otherwise nearly useless if you're not building that exact home. I meant to buy the master class instead and forgot at the time of purchase as I was do excited to start this journey. Lesson learned. Don't shop online when you're not focused.
I look forward to starting my adventure with aircrete. I feel you are overcharging for your digital content and the other concerns mentioned above but, I do thank you Domegaia for what you have provided. Keep up the work. A cold weather Canadian dome workshop would be greatly appreciated. I have access to a beautiful farm where we intend to build in rural New Brunswick that would fit right in with what appear to be the companies morals and beliefs. This would be an exceptionally ideal location for your first Canadian workshop and I could use the help building my dome. Wink, wink.
Thank you and good afternoon, good evening, good night, and good morning to you all.
HELP PLEASE ! Hi I purchased a DIY little dragon kit a week ago and it was missing the Front Cover and one CLAMP for the WAND . I emailed 4 to 5 days ago but I got no email back. ANY way I managed to make a cover and assembled it to find out that soon as I put the air pressure on the pump LOSES its prime. I checked for leaks and I can't find any . Wondering if the pump is defective.
Maybe it was the foam density and weather at your location ? I’m finding out the same thing it’s his cement is processed as well foam destiny and cement itself climate I know sodium larly sulfate that’s makes all the bubbles foam .. last in Sedona wants build her done looking for people on this site help volunteers help build some .. Ive scene domes peeling cracking because they strayed from domegaia building instructions domes cracked in have over using stucco wet aircrete improperly .. most running to dawn and Drexel.. guy Mexico been upset he can’t get access to Drexel or 7th generation he bought bag of sodium larly sulfate add to his cheapo dish liquid bricks fall apart etc.. he’s really upset frustrated
I don't find a cheap good source of fabric in Thailand,, I found some with Lanko company but its expensive, 1m by 10m cost 900 bath or 28US$. I m looking to buy a big roll as I have many projects coming up..
Anyone knows a supplier or made some test with other fabrics in Thailand ??
I tried it out at the recent workshop. Unfortunately the bottom of the injector was a little too low and it was banging on the top of mixer blades. We were pressed for time and so we continued to use it like that until the constant banging finally broke it. It's important to get the bottom of the injector close as possible to the blades, but if it touches that's definitely too close. The other problem I had was getting the dang chuck tight enough. The mixer paddle fell out a few times while mixing and the key just didn't seem to fit right, even though I'm pretty sure it was the original key.
Overall I think this setup could be very practical and could be an excellent solution if done properly.