Aircrete is great, but watch this before you build with it!

Aircrete is a building material that offers amazing properties. Here, I explain what it is, how it is used, and what I’ve learned using this material.
Here are links to things mentioned in this video:
Steve’s Dome Home: • My Thailand Dome Home ...
Domegaia’s website: domegaia.com/
The Honey Do Carpenter: www.youtube.com/@HoneyDoCarpe...
Aircrete Harry: / @aircreteharry
Below are some affiliate links for products that will help you make aircrete. I am paid a small commission on your purchases, at no cost to you.
Drexel foaming agent: amzn.to/3CuhU6Z
Mixer: amzn.to/3Qja5XJ
Air compressor: amzn.to/3QpoFNs
Get your Radical Gastronomy Merch here: www.radicalgastronomy.com/merch

[@chrisashdown1484]

In the UK we used Aircrete on building many new hospitals 30 years ago, after about 25 years they started to fail and now are being knocked down and replaced, so whilst it had advantages in build it does not have the expected lifespan

[@user-ir1lu1ei4n]

It’s was built incorrectly that’s why

[@normbograham]

perhaps 30 years ago, I was working on a hotel, where they put rigid foam board insulation, then skinned it with a stucco finish. The walls were not painted before a child slamed his bike handle against the walls, and broke thru to the insulation. Then damage kept happening. So, what looked like it should last 50 years, did not last 2. Hard to believe how many times exterior walls get hit with something. Within two years, all foam board was removed up to 6', and replaced with solid durarock like stuff.

[@user-ek5pp2wy3g]

@@normbograham You are residents of a backward country :) Masons, sorcerers, horoscopes, etc. (The country's forces are dedicated to this! ) This problem was solved in the 70s in the USSR. It was enough to steal the monograph. England is stuck in the 50s in the 90s (!). Buildings are falling apart due to corrosion of the reinforcement in the slabs. Aerated concrete is a type of artificial shell rock. You might as well cut in the quarry :) (It’s hard down there, and fluffy at the top of the quarry) Styrofoam is poison

[@robertweekley5926]

@@normbograham - In the 1950's, My Father worked in California on Tract Housing. After Occupancy - The Low Cost Housing Tenants often knocked holes in the Sheetrock. Many trips back for repairing the sheetrock. Next set of houses, they put 1/4" Plywood on the studs first, then the sheetrock: No More Calls back to fix busted sheetrock! Styrofoam can be bonded to Aspenite, Plywood, or other standard sheet materials with good strength, to give it greater durability. Same with Aircrete, though it might require mechanical attachment (Screws, or Bolts).

[@Luming-di9rf]

@@user-ek5pp2wy3g Is no country as backward as yours.

[@onecompass7290]

Enjoying your videos, thanks. I built a straw bale in 2000 and used the bales as the lath inside and out to apply three coats of clay-sand/lime/chopped straw plaster in different recipes as you have done. I worked great, no chicken wire etc. The result was gorgeous, non-toxic, cured hard and sound, no cracks etc. Final coat was sand/water/lime with lime wash over all for a stunning bright light reflective structure. I sold it in 2022 for 10 time what it cost to build. I had a gorgeous home that never needed cooling and very little heat in the VT winters. I love watching all the innovative notions people are putting into practice. Good on ya mate!

[@user-xt6lu2mt7b]

I'm looking at building a straw bale home Love to pick your brains on the things you learnt before and after building. And a bit more info on the rendor 🍻

[@domegaia]

Thanks for the great video! We have also build 8' walls that are poured horizontally on a frame that then tilts them up into place. We should have some information and a video on this coming out soon. We also have found that fiberglass stucco mesh offers great strength for the exterior layers. I would also like to offer one clarification on R-Value. There is one article out there that claims the 5-6 per inch but the information source for this is miss leading. There is an experimental commercial product that is similar to Aircrete that can achieve this r-value but it offers no structural integrity at all. Aircrete as we use it has an R-vaule of 1.8 to 2.3 per inch depending on the mix. this is still very good for the cost and lack of thermal bridging and air infiltration you get in a traditional wall. A normal 2 x 6 wall with R19 in it will actually perform around R-13 when the whole wall is factored in. I hope this information helps.

[@radicalgastronomy]

Outstanding. Thank you guys for innovating with this material. I’m looking forward to this new information!

[@beartankoperator7950]

Dome Gaia out here promoting correct info, Awesome! The mistake happened so early into the aircrete hype it became super widespread it doesn't help that Google still provides this incorrect information preferentially

[@noellwilson1273]

I was wondering about that super R value also. Is Aircrete that much different from Aerated Autoclaved Concrete (AAC)? A friend of mine moved from a high mass solar house near Oak Ridge, TN that had a wood stove for cloudy winter days to an “ideal” AAC house in Northeastern TN. The R value of AAC was low but the ads preached thermal mass. Thermal mass is fine in New Mexico but not so good when you have week long spells of cold cloudy weather. My friends now depend a lot on their wood burning stove and found that the AAC loses heat in accordance with its stated, low, r value.

[@radicalgastronomy]

@@noellwilson1273 interesting. I had thought the big problems with AAC were cost and embedded energy. Seemed cool, otherwise. Good to know!

[@nc3826]

AAC, R value.varies depending on if it is loaded bearing or non-loaded bearing .AAC.. Plus it tends to have a relatively high levelized cost in the US, since the supply is limited.... much like Hempcrete, ....

[@oakld]

My house is built with "Aircrete" (-like product, Ytong blocks). Such products are available in Europe for many decades and are now, at least in this part of Europe, number one material. The aircrete blocks material is ranging from pure cement to ones with high gypsum (and some other stuff) additives, that drastically increase R value. Unlike those DIY alternatives, those are "baked". Blocks are precisely polished to fantastic precision of 0.5mm, so they can be joined with super thin film of mortar or (approved) mounting foam. Typical wall thickness is 300mm (10 something inches), but Today often up to 0.5m. Even with 300mm you don't necessarily need any more insulation to suffice the code, but it is typically added. I have 300mm Ytong wall + 160mm EPS insulaiton and together with tripple pane windows the house performs about at about 2.5x of passive house limit. There's no point in doing aircrete DIY in Europe, but to those overseas, if they got all the way to building an aircrete foam machine, I'd recommend to also make also a very simple polishing machine and polish the blocks to precise shape - it will sure make the structure much more sound, will drastically reduce need for mortar (or mounting foam could be used) and make assembling super easy.

[@RRaucina]

Yes, I have seen those systems in Europe and it is maddening that you can't buy those blocks in California or most of the USA.

[@boltholeonabudget6526]

I was gifted a 16' diameter geodesic dome made from 3/4-inch conduit. I lined the inside with metal lath and ferrocemented the inside. Then I built a 18' dome over the smaller dome and metal lathed and ferrocemented the outside as I poured lifts of aircrete.

[@jimmymcgee4101]

Just discovered aircrete, like the light weight, good to see pure honesty, we went to u-tube university and are in the process of building a cabin at the age of 70 and 66. Are we crazy, yes.

[@aischaparker9471]

here in New Zealand there is a type called Foamcrete, its 20mpa and has fiber glass strands about 1.5 inches long but can spay out if pulled from each side resembling 2 'W's persay. ive seen it used as block fill in high rise buildings, on the uppermost floors , which also has steel rods within. And it has been used to form garden pool structures and then a final over lay is sprayed on at great force about 2 inches thick which is then troweled and sculptured and either sealed with a paint or tiled over. yes its been around for about 20 years now , Very light and easy to work even vertically which is alll in the batching success so its not wet enough to slump off the walls.great video thanks for sharing.

[@mori8424]

Commercial airkrete (spelled with a k) does have an r value of 5 or more and is used as an insulation but it isn’t made with Portland cement so it doesn’t doesn’t have much strength. DIY aircrete spelled with a c is a lightweight concrete with some structural strength but the r value is only 2 per inch thick not 5 (with the density most commonly used on KZbin- 94 lbs cement, 6 gallons water and 43 gallons of foam) denser mixes will have more strength but less than 2 r value. Aircrete with little pieces of EPS foam added to the mix will have close to a 3 r value but strength is very compromised.

[@magapefarmshomestead6453]

Also if you want insulation I'd recommend styro aircrete (eps). As I can't remember everyone you mentioned that you had looked at I'll recommend the channel of "Stephen Williams"

[@foodmonsterweightloss5886]

Stephen's channel is: Abundance Building Concepts. He has a great system. It's worth noting, Aircrete Harry also uses styro aircrete.

[@lenturtle7954]

Ive sprayed shotcrete and supervised a large shotcreting crew for 18 years in the mining contractor industry . we use robots and also spray by hand . I never believed in the fibrecrete until we tried to demolish tunnel rings that were fibre crete . Its next to impossible I now totally believe in it the strength and durability is amazingly robust . As far as vertical construction with aircrete -you need to do less than 1 meter per hour with high strength concrete without stopping if you stop you need to greencut the surface to get a proper bond with the next pours . i would think air crete could be done similarly if you poured slower or used an accelerator Like meco 160 to harden the mixes faster so u could increase the vertical rate. If you build a house that lasts longer than the glue and sawdust ones we build in todays time your footprint get smaller as each year passes . GREAT VIDEO

[@radicalgastronomy]

Thanks for the good info!

[@dirttdude]

way back when, i was desperate, there was no aircrete, i developed styrocrete, made it into 3X3 blocks 4 inches thick and insulated our entire root cellar, that was 35 years ago and it still looks and smells like new in there.

[@brokenrecord3523]

😳 What does it smell like?

[@eileenmcloughlin4778]

I have been searching and searching everywhere for how to make sawdust and lime insulation. I can't afford regular insulation as I'm moving into a shed to live. I'm 70 and have a fractured vertebrae but have heard that you can do this with little effort. However, I don't know the ratios for each. Your video's are so inspiring. Thank you for your ingenious inventions on building with local materials. I can obtain $1.00 bags of sawdust but am not sure where to go from here. Do you have any ideas for me. Thank you very much. Intelligent people always come up with using local things for building.

[@jonisolis9645]

Wishing you the best and hope you find the help you need to build a nice home.

[@Kadranos]

If you added in a lightweight fiber reinforcement like chopped fiberglass or basalt fiber, you might see enough increase in tensile strength to have moveable panels. Even some of the more natural fibers might be sufficient. Another possibility is your dustcrete studwork wall section built then stood up. One idea I've had in my mind since I learned about earthbag homes, rammed earth, and aircrete is using a metal sprayer to put a thin aluminum shell over it to weatherize it. Apparently this kind of process has been used over 100 years.

[@ldnelso2]

Basalt fiber is a great idea for this application

[@Stuffandfangs]

They make hemp bricks, they are naturally sticky and can form hard resin as well, hemp fiber might be an extremely affordable way.

[@B30pt87]

Wow! I have been following the same You Tube channels, and came to about the same place (minus making my own foam generator.) I am a fan of domes, but your drywall-type slabs sound like a very good idea for stick frame houses. Overall, this video was excellent in a number of ways! Also, I had no idea that grain bags were fireproof. That changed my thinking because fire safety is huge for me & I didn't want to incorporate anything in my aircrete that would melt (like AH's styrofoam mix) or offgas with intense heat. I subscribed immediately, because you are the kind of person I want to hear from. Thank you for sharing!

[@radicalgastronomy]

Thank you! Glad to be of service.

[@Enoch1970]

Jamey Mantzel has used something like dustcrete. He used a Styrofoam grinder, to take styrofoam products into the cells, and then using the cells as a basis for styrocrete. It is pretty interesting. Used this stuff to make several domes on his homestead down in South America.

[@crawkn]

Aircrete has been in practical use for many years. My first notice of it was its use as the primary wall surfaces of a warehouse-type building in which my workplace was housed in SHAPE, Belgium, a NATO installation, in the '80s. I'm uncertain of the superstructure design, although I assume it was steel beam supported, but the walls themselves were probably at least six meters high, and supported their own weight. They were very large blocks, probably each half a meter in height and approximate thickness, and quite long. They appeared to be bonded using some synthetic caulking-type material, although that could have been only an exterior sealant rather than the primary bonding. My only critique, which would apply for some uses and not others, was that it was easily scratched and dented, but that could be addressed when desirable with some over-coating. On the benefits side, it doesn't transmit impact forces efficiently, so it is resistant to cracking and shattering.

[@SpiderF27]

Those blocks are self-sustaining but you can't build a second floor on top of it. In many countries, in Estern Europe for example, you won't get building permit to build more then one floor without reinforced concrete encasing, columns. Another issue will be, if you want to apply insulated boards on the façade using drilled fixxings. It may crack or crumble. That being said, those blocks are brilliant for indoor partitions, separations walls etc.

[@crawkn]

@@SpiderF27 I saw one video of a couple who wasn't able to get consistent enough results and gave up on the material but if it is pre-cast by an experienced manufacturer I'm sure it's fine. No I wouldn't think you should use it under a more compressive load than maybe a small roof.

[@SpiderF27]

@@crawkn For a single storey building will be no problem. Now there are plenty of manufacturers, big enterprises all over Europe that make those blocks in all sizes. Ytong is one of them. You can build a house in no time with those blocks.

[@elizabethpears307]

Great video! Thanks very much for not having distracting background music👍

[@Boscovius]

I've played with creating my own foam generator but have yet to actually make the foamcrete for the project I'm working on. I love your idea for a foamcrete composite sandwich material. I imagine applying a water based starch glue like wall paper paste to the cured foamcrete slab while still in the form. Then cover it in a paper product like newsprint. No plastic, you want it breathable. When dry, flip the planel and apply the glue and paper to the other side. Paper should be overlapped to avoid seams.

[@mikescudder4621]

Here in Brazil theres a movement (who say they´re green but they´re not) where they use sheets of polystyrene stood up and held by short sections of rebar coming out of the concrete slab. They then put up metal slab reinforcing either side, tie it all together, give the polystyrene a light coat of water cement mix, then a fairly thick stucco layer. Its a pretty fast construction technique by our standards and they build multiple story buildings with it. But is metal and polystyrene intensive which have doubled in price the last few years. I always figured that aircrete panels without metal frames like ac harry honey (whatever is his name is!) would make a good substitute for the polystyrene sheets. But from what you´re saying, you were unsuccessful in making an aircrete panel that would make it out of the form?? Or were you solely focused on the drywall concept?? Cheers.

[@ursulagallucci5749]

I'm on a similar hunt for the "best" infill material for timberframe walls. Considerations for an ideal infill/wall material: 1. Insulative and thermal mass value 2. Strength and durability 3. Anti-Pest 4. Ease of installation (a one step, al in one process would be ideal) 5. Environmentally and human healthy- Low embodied energy, natural renewable material, non toxic. 6. Aesthetic value 7. Low cost. So far, old ways and new ways still haven't produced a "best" way. Thanks for having boots on the ground with your experiments.

[@radicalgastronomy]

This is the quest. I’m really liking the dustcrete. I plan to test a lime/clay binder, in leu of the portland/lime mix I’ve been using. I think it will be the closest to meeting these specs.

[@BlackjackArmyCaptain]

Fantastic advice! Thank you so much for sharing your knowledge.

[@quintondavid7023]

Hey I really appreciate the analysis and multiple applications/uses. I had not personally stumbled upon many videos demonstrating floor slab assemblies. Keep crushing

[@radicalgastronomy]

Right on. Will do!

[@sonicx059]

I have not tried it, but it has popped up in some of the videos that I watched. Also I do not have experience with building homes, or anything of the sort. Just like learning about it all, and such. Eartships, tiny homes, and just anything that seems... unique.

[@Shaboynga]

It’s definitely an intriguing product. It just seems so tough to get the mix right for what a person needs.

[@JarrodJordan-gf3ul]

Have you looked at the Styrofoam AirCrete (Stephen Williams) I am wondering if you could use the Sawdust in place of Styrofoam, and get a substance that is wetter like his, and more readily available in your area.

[@radicalgastronomy]

I have not, but will, now.

[@Faithful_Tribe]

Mr. Williams seems like a neat inventor.

[@tanjirokatoichi7425]

@@radicalgastronomy Sir, i 2nd with Mr. Jarnod Jordan on Mr. Stephen Williams styrocrete. I watched many videos on Aircretes (aircrete Hairy, Honeydocarpenter, styrocrete etc. Your Dustacrete seem to be the simpliest and easiest to work with and create. Glad i found your channel and videos..

[@radicalgastronomy]

@@tanjirokatoichi7425 I have watch some of the styrocrete info, and agree that there is potential. Personally, I like to avoid materials that have the potential to “off-gas”. I find styrofoam to be kind of gross. The dustcrete is performing quite well, and avoids the use of petroleum based synthetic materials. Glad you like my info!

[@tanjirokatoichi7425]

@@radicalgastronomy i love it!

[@user-tv8qe8nl9y]

Great video. Captures all the basics, including all the concerns. I'm particularly interested in the slab walls poured vertically and then stood up. Need to be able to produce interlocking panels without the cost metal framing. Also looking to include exterior design in the pour (board and batten) to further cut down on cost. Would be willing to invest in facility to manufacture panels in the US. While DIY is fun for small projects, the potential for quality control failures is a concern. If the remaining concerns can be resolved we will have an answer to affordable housing!

[@richardjones2767]

Great video! I've done some work with papercrete and a hempcrete-like substance using other vegitative substrates, but now that I've retired, I have time to delve into this exciting material. Thanks for your insights!

[@radicalgastronomy]

Right on. Enjoy yourself!

[@socialism2.0]

Aircrete is well developed in Russia, but because of the complicated technology, many people have switched to polystyrene concrete. It's a very convenient material. You can make panels. To strengthen these concretes add polypropylene fiber. Good luck!

[@sketchesinsand8593]

I enjoy your channel. Thanks for reporting on all of your experimentation. Also, thanks for supporting your local farmers in their fight against the new County Dude. Anyway, in my county I have codes to deal with (I envy your "lack" in that respect), but I'm thinking I might be able to use some kind of aircrete system for insulating a timber frame structure. I like your idea of making a SIP-like material. Thinking out loud, James Hardie makes a 4x8 fiber cement panel product for board and batten look siding. I wonder about fastening one of those cement panels to a dimensional lumber frame, then pouring aircrete or dustcrete into the panelized frame. Maybe drive some nails through the panel to add something for the aircrete to grab onto. If the aircrete bonded well to the siding panel, with the added rigidity of the lumber, that might make a nice SIP replacement. Finish off the inside with plaster applied directly to the aircrete panel. Again, just thinking out loud for now. Won't have time or space to experiment with it for a while. I know that you would balk at the cost and all the commercial products, but for me, it would be a way to avoid all the outgassing foam as well as being very fire resistant. And cheaper than SIPs, especially since they would not need an additional layer of siding. I think I might be talking myself into this...

[@sherrystone3307]

Thank you so much for your in put on air crete as I have been doing research also. I love the look of domes or organic forms . I stumbled across a photo years ago of a small dome about 10 or 12 ft. in diameter . These two guys had made a form for aircrete that had six sides to it instead of a rectangle . It looked really great ; but I've not been able to find any more info on that and how big you can go with it. The six sided shape was about 1 to 2 feet in diameter . the block that is . Do you have any info ?

[@gordonauld5945]

I have not used or tryd ether yet although your dustcreet looks very good and I will be testing it and probably building with it in the nere futcher.

[@penguinistas]

Interesting discussion, thank you.

[@radicalgastronomy]

You bet. Thanks for watching.

[@wildernesshermit]

Excellent presentation. Many thanks.

[@radicalgastronomy]

You bet.

[@TimberTrainer]

Thank you for sharing your thoughts. Have you tried styroaircrete? It's basically shredded styrofoam mixed into aircrete. It seems to overcome a lot of problems typically associated with aircrete.

[@50shanks]

I love the idea of styrocrete and have made my own, but unfortunately it has been banned due to 2 hour fire resistance requirement, and toxic gases emitted in a fire. Interested to know if anyone has overcome this issue.

[@ShivaTD420]

Use perlite instead

[@geoffreydebrito7934]

@@ShivaTD420 Perlite does appear to have the potential for a successful natural alternative to petroleum based Styrofoam beads.

[@ShivaTD420]

@@geoffreydebrito7934 just don't mix it too hard when the perlite is in, over mixing will crush it into a powder loosing the insulation benefits. It will also make the concrete a bit more water permeable than the styrofoam mixes. So make sure you get decent vapor barriers. The perlite mixes are not too far behind the Styrofoam in weight, but they are usually much stronger. For perimeter walls or multi nozzle concrete printers I usually lay down three layers. A conventional structural mix for the outside envelope, a perlite insulating mix for the core and a fine particle white sand mix with high latex for the interior layer. This gives the walls a nice shiny white finish that looks like it's painted. This white layer is impermeable, so it can act as a vapor barrier by itself.

[@echoeversky]

Thank you for the summation of the various folks solving the aircrete!

[@francoisbouvier7861]

Thank you. I'm watching closely and hope to integrate some of your principles into my projects.

[@radicalgastronomy]

Wonderful!

[@annmarieschantz9724]

I was curious about arecrete myself. Thanks for the video. Never tried it.

[@jeremiahshine]

Put a stick under the 98 pound portland mix and cut the three exposed sides. Lift the stick and stand the bag up leaving you with half of the portland on each side. Slice the remaining side. Now there's two 49 pound loads.

[@corystadman9089]

Or just pick up the 100 pound bag?

[@SixPackDan]

I would love to see you find a successful way of making an aircrete wall. The R value per inch is amazing. Can you imagine a 6 inch thick wall and or floor!

[@radicalgastronomy]

It still intrigues me, but other commenters have pointed out that that r6/inch number is inaccurate.

[@gregorymhouston]

I've made thousands of aircrew bricks for equipment sheds. We live in an arid desert regen, so extremely hot days and cold at night. Curing aircrete in extreme heat is a huge challenge. However, it works well, is cost effective, and has awesome insulation properties.

[@user-ek5pp2wy3g]

In American scientific literature, engineers complained that the builders of the 50s and 60s were crazy and lived in the 19th century or did not work well. And now Americans remember “how good it was in the 60s.” Naturally, wild lameness. There is a super construction crisis in the country and the banking and construction lobby. They cannot make cubes from free concrete (the price is only for cement and air - waste). (1 plant per country) So that lonely homeless people build 150 m2 houses in 3 months. Soviet panel houses are divided in 1-3 days into a House (Foundation month or from ready-made elements = week.) And the first floor itself in 3 days. 7 days = 2 floors. The city mafia seems to steal 20,000 per homeless person per month. And this is the price of the apartment :) 5 floors without elevator. 60 apartments. 200 people with housing.

[@thomasmurray4717]

Excellent video. 👍👍 Thanks.

[@robertnicholson6686]

Very useful information. Thank you.

[@radicalgastronomy]

My pleasure.

[@patriotjoe3110]

I have been interested in aircrete for a while and plan to build a shed with it this year. Aircrete has been around for decades and is widely used in Asia. It is referred to as cellular concrete, or air entrained concrete. One method of manufacture involves curing it in an autoclave. One method I have seen is to make panels and connect them with spikes. When the wall is up cover both sides with chicken wire & stucco for strength.

[@radicalgastronomy]

I believe there is an autoclaved block available, as well.

[@TheMysticBohemian]

Amazing video thank you. Your conditions, with holds and requirements mirror my own.

[@DennisKenneybees]

I have watched thousands of videos on various topics and yours is one of the best. Thanks

[@bobosun9741]

Thanks for sharing!

[@evennorthug2585]

Great video. Gives us a more balanced approached to aircrete, a quite fascinating and promising material.

[@t9358]

Thank you very much for your time well spent, excellent work, saved me a couple hrs.

[@radicalgastronomy]

That’s what I like to hear!

[@grim6980]

I am going to be looking for land to homestead in about 4 months. Videos like yours have my imagination going with possibilities.

[@radicalgastronomy]

That’s super exciting! Good luck with your search.

[@cheniah9761]

Thank you!

[@underourrock]

Thank you for the video. Some really good trade off analysis there and consideration given to alternatives. Ignoring for a moment the material source and looking at it more from a long term goal perspective: truck bed liner both as a reinforcement itself and as a bonding agent with a stiff backer in a manner similar to drywall is intriguing. I really like the SIF concept for if a panel is sturdy enough to survive handling, shipping, and more, then it is likely a lot less fragile once installed as well. Paper is pretty high density... When paper is rolled up tightly, it is stiff. When paper is pulled tight and bonded to the gypsum, the taut paper is a key part of its overall sturdiness. That coupled with the fact that trying to bend drywall: one side of the paper is under tension regardless of which direction you're bending, the key here is having that tension on both sides. A high strength material bonded to the aircrete with a bonding agent itself that exhibits high strength properties could be key. Have you seen how truck bed liner has been used to reinforce cinderblock walls or allows something else survive catastrophic impact? Where it might fall down is cost per square foot? Not sure. That seems like something that is solved with economies of scale and labor savings. Rolling out or spraying a bed liner is pretty quick. If the physics and bonding hold up, then other substitutions may be worth experimenting.

[@radicalgastronomy]

That’s an interesting thought. 🤔

[@markpennella]

Great video! I have experimented with Aircrete insulation blocks. They get more ridge with time...months.

[@rongray4118]

I fully agree with your final statement in regard to the use of portland in ANY project and the LONGEVITY of the project usefulness. If the statement were not absolutely true - we would not be witnessing Roman architecture still standing to this day. The same can be said of Meso-American structures that stand COMPLETE in this day and age as well!

[@radicalgastronomy]

Here here

[@AlwaysCensored-xp1be]

Romans had access to a particular pumice that helped them make lightweight domes. Had many types of concrete including underwater setting types.

[@mondavou9408]

Another good video.

[@radicalgastronomy]

Glad you enjoyed it

[@beartankoperator7950]

I was about to correct the r-value info but the legit Dome Gaia already corrected thats awesome

[@radicalgastronomy]

The hive mind is on the case. 😁👍

[@beartankoperator7950]

@@radicalgastronomy Haha

[@NoCantsAllowed]

Nice synopsis of your findings and your efforts. Best of luck with your goal. I do hope you reach it.

[@jdwilsun]

Good info.

[@lenturtle7954]

Have you looked into using poly fibre in the aircrete like shotcrete . No rebar or mesh required increases strength and resistance to cracking . Amazing strength increase in concrete

[@radicalgastronomy]

I haven't tried it, but it sounds viable.

[@clintyou1]

Just subscribed to your channel. I think my goals are closely aligned to yours. I like persons who are not closed minded to one system but willing to shop around for ideas and combine concepts if necessary for their specific needs and projects. With that said, take a look at Tiny Giant Lifestyle. He is my favorite "explainer" of aircrete. I love his channel because he goes beyond simply sharing his passions and experiments with others but, against the backdrop of a very analytical mind and years of building experience, he walks his viewers through very logical and well presented reasons for his building decisions as they pertain to aircrete. In my opinion, he presents the most logical arguments as to why aircrete is perhaps the most practical alternative building option for our modern society. (p.s. I have zero affiliation with him - in fact, I don't even know the name of the gentleman, only his channel)

[@radicalgastronomy]

Cool! I’ll check him out.

[@DerpMcDerp101]

Great share.

[@radicalgastronomy]

Thanks

[@utubeape]

Thanks for your helpful insight. to get the fabric to bond to the aircrete you could try soaking it in Bonding Agent before lining your form with it. You might have to look at what you are using as a form, maybe use shiny polycarbonate or similar. I also wondered about chopped fibre strand, but you dont want to waste it by having all through the mix but just mix it in a few gallons enough to cover the base of the form about an inch or so, then after it starts to set pour in the rest, and later top off with another inch of the chopped strand added batch. this should give you a sandwich of aircrete where the base and top is tough. I am assuming you would make big panels and cut up as needed

[@radicalgastronomy]

Perhaps a sprinkling of fiberglass in the form, then on top of the pour. I bet if one did that and added some concrete reinforcing wire in the panel it would work.

[@markheffernan7016]

Have you looked at MgO cement to adhere to the row cover material? It sets up fast and will stick to lots of things that Portland cement will not bond to.

[@markheffernan7016]

MgO cement is also not conductive of heat, electric, or water. It is not cheap....but...

[@emariaenterprises]

Thanks for that.

[@HankMorris-el6jg]

There was this girl that worked on this ranch with me when I was younger, she was all don’t hurt the environment nature what ever. She was so environmentally conscious that she didn’t have a car, but every Saturday night when we would load up to go into town to the bar she had no problem hopping up in my 8 mile to the gallon monster truck. One night, in town at the bar, I over heard her talking highly of her self about how she was so holy because she didn’t have a car and how cars are so bad for the environment. When we went to leave, after last call, 2a.m., I got in my truck to leave and she came around to the passenger side to get in but I didn’t unlock the door. I explained to her that if she thinks cars are so bad maybe she should just walk the 40miles back to the ranch. As I was driving off she called me a SOB. She made it back to the ranch, in a car, and she moved back to Denver a week later. I ran into her about a year ago and I asked her if she ever got a car, she said she does now, and she keeps it parked in a garage she made of aircreat and a bunch of recycled crap. I bet it’s really nice. Thanks

[@radicalgastronomy]

🤣

[@jram7047]

Very good video. I live out on a small homestead. I built a metal shop about 6000 square foot and I also have a home here already. I'm interested in building some out buildings with this method. I've got a few questions if you've got time and are comfortable discussing them. I don't know why but I had the impression that people also use brown up Styrofoam waste to create air pockets. I also am curious about the addition of fiber into the Portland mix . When the engineered plans came for my metal building I was kind of disappointed with how lax they where with concrete thickness and strength requirements. I went to a far higher strength concrete but I also had them add fiber to it for more strength. The fiber just came out of a bag and didn't add much cost at all. It was mixed in the trucks before they poured the concrete. My location has one thing, very dry and hard ground. My current idea is to use my small tractor with backhoe to make forms in the dirt itself. To tamp it down with sand and to then make panels and let them cure for a few weeks before anything happens. I would like them to be structurally sound and insulating. Inside I plan on sewing plastic materials and making a dome roof inside a rectangular building. The walls would be these pre formed pieces and the roof would be a first pressurized dome, using chicken wire, rebar and whatever else may add structure I would spray the outside first with thin layers, next would be a layer inside to lock the shape in. From there I would use bonding agent or whatever is necessary to make a roof strong enough for the high winds and such in my area. I would like to be as environmentally considerate with materials as possible but not to the point of loosing strength, adding excessive cost or time to the build. My hope is for 8 foot walls, with a 20x30 outside footprint. For the floors I've seen a few dirtcrete jobs that I would like to do with a lot of compression and then a good coating over the top. The eventual goal for me is to have this as an efficiency. I have years of hvac experience professionally and I've developed a small geothermal / underground storage tank cooling system from small pumps lines and a converted inverter style window 12000 btu window ac, that I currently use in my bedroom in my home. 1 ton is typically good for 500 square feet in a typical home in my area so I'm sure with highly insulated walls and roof the 600 square feet plus added air space of the dome will be well within reasonable use.

[@rocktech7144]

I have built structural panels 2 inches thick with no reinforcing materials that are still in use outdoors as table tops with no coating either 4 years old. Used gypsum and latex additives. It can be done.

[@radicalgastronomy]

Groovy. In what form was the gypsum?

[@lenturtle7954]

Ive experimented with a 50% shredded recycled styrofoam mixed into concrete with reduced heavy aggs also used fibreglass fibre for rebar replacement and had great success light - recycles guarbage stro foam strong fire resistant easy to put fasteners into or stucco or parge . 🎉 You can haul larger loads in a concrete truck as half the concrete is very light (foam and cement, water ) 🎉

[@radicalgastronomy]

Cool!

[@DeborahStephenson]

This was a very interesting and informative video, but there are a couple of mistakes in here that I would like to correct before someone does something they may regret. The first one has already been caught and corrected by domegaia but I thought it worth repeating. Aircrete has an R-value of approximately 2 per inch, not 6. That makes a HUGE difference when you are calculating the depth of your walls, especially in a very cold area, so people should be sure to factor that correctly. The second mistake is potentially dangerous, so I want to clear it up once and for all ... recycled grain/feed bags are NOT fireproof!!! I believe you may have heard someone mention Aircrete as fireproof and somehow misunderstood that, but take my word for it, as someone who has homesteaded and fed a LOT of animals from those sacks over the last 30 years, they will burn easily and melt like any other plastic when flame is applied. However, if you have a ton of those sacks, you still have a very useful material on your hands--DON"T TOSS THEM! I have sewn them together to make outstanding "free" tarps, cut them down shorter and added straps for heavy-duty totes and reusable grocery bags, and even used them for hauling heavy garbage that ordinary trash bags could not hold without splitting. They also make excellent grow bags--either with the tops folded down to make them shorter and used like buckets, or filled with soil and with the ends stapled shut laid on their sides (cut an x or hole to insert a plant). You can even use them as Earthbags in foundations and walls. They are a great resource, just not fireproof. Anyway, thanks for a great video. I look forward to more of these!

[@sz4179]

Thank you Deborah S because I have no personal experience with grain bags but fireproof plastic didn't seem likely. Love these RG videos and shared ideas! Re using the grain bags for facing aircrete panel, If they are Polypropylene that's at least relatively LOW-Toxic plastic and afaik gluable with something... thinset? Idk! Will anything stick to it? Will it degrade as some plastics seem made to disintegrate... biodegrade? Into microplastics? Anyway..If they're polyethylene bags, like cutting board material, very few glues will work. E-6000 is one for small projects, but it's so wretched stinky. Tap plastics might know.

[@DeborahStephenson]

@@sz4179 I believe most feed sacks are polypropylene (not 100% sure, but I believe they are). Until recently I thought nothing (as far as glues go) would stick to them, but I ran across something that claims to work on three hard to glue plastics -- polyethylene (PE), polypropylene (PP), and polytetrafluoroethylene (PTFE). I haven't tried it yet, but it is made by a company (Loctite) whose other products I have tried and found excellent, so it probably does what it claims to do. It is called Loctite Plastics Bonding System. I plan to try it soon because I have two 25' PVC domes that I built last summer, and I want to put a waterproof skin over them before spraying a ferro-cement shell. (The plan is to put the skin on to keep from spraying through the mesh.) I'll make the skin from glued feed sacks made to fit the triangles closely. Then I will remove the skin and top the ferro-cement shell with aircrete, then seal that by spraying a second--outer--ferro-cement shell. The idea is to get the insulation value of the aircrete plus the strength of ferro-cement.) I may try an experimental smaller dome before committing the process to the two larger ones. No point wasting time and money, if it doesn't work. I'm thinking of doing a 10' or 12' hen house as my test since I need to build a new one anyway.

[@brianclark8821]

I am curious how you get R6 per inch? Of course, it depends on your density in the mix. Must stable mixes seem to come up with roughly R2 per inch. I've played around a little with it. I look at it as filler/ insulation, not structural. I think it can be utilized however.

[@Mike-hr6jz]

You should consider buying 50 pound bags of milled fiber it comes in different lengths. It is fiberglass in almost a powder form, but it can come as long as a quarter of an inch down to a 60/4th of an inch when you mix this with your air Crete it acts like microscopic rebar. It adds an immense amount of strength. You just have to get the right ratio. And then, of course, I would go back to the hardware cloth galvanized for more reinforcement. There are also other Paula burners that can be added for more Elastomeric benefits, making this thinner, stronger and lighter

[@gcnewd]

Thank you

[@ottodidakt3069]

Have you thought of lime as a basis instead of cement ? what would be the limitations in your opinion ?

[@brianburnssailorslife5383]

Good commentary on the matter. Aircrete has my attention and I've heard from other sources that it is a file product with a lot of possibility.

[@MaryAnnNytowl]

@8:09 being a penny-pinching miser myself, I support your position. 😊😂 I'm looking for cheap material for a few projects I need to get done with a coin-screaming budget, and i think aircrete would be perfect for one of them. On a side (but very important) note, please, please take time to tell your loved ones you love them EVERY chance you get. Tomorrow is not a given; you're never promised the next sunrise. ~ ~ ~ ~ "And don't let it break your heart. I know it feels hopeless sometimes. But they're never really gone as long as there's a memory in your mind." _Hold On To Memories_ Dave Draiman, Disturbed

[@HEMIdouglas]

Aircrete has the insulating values, but needs the structural strength that would be provided by aluminum screen, or nylon mosquito screening. The simple design would be an inflated dome pressurized with inserted water and electrical tubing, boxes, bubble windows or light tubes. An air lock doorway entrance provides heat/ cold / security protection. Rocket mass heater and cooling pipes in floor using air would help control temperature. The exterior/ interior may have chicken wire / screening and be epoxy coated for waterproof. The base design includes drainage slope to the door.

[@murraymadness4674]

Thanks for the video! Not even myself who has built lightweight concrete structures knew how bad production of portland cement is for the envirornment, it has me rethinking a bit of my approach. One of my building goals was fire resistance, the use of timber in a fire prone area where I own land is required by code (without structure engineering approval) but the worst possible material to build with in this environment. I was using perlite which I believe is a significantly better approach than aircrete. Perlite is rock bubbles and has more strength than aircreate, but most importantly is it creates consistent structure as the perlite is graded, vs foaming that is very difficult for a DIY to be consistent. Requiring manual application of plaster/stucco really defeats the majority of the purpose in my view. This makes the whole process highly labor intension and time consuming. I have been looking into using Bamboo these days..

[@spamman007]

Perlite retains water so might not be a good additive especially in cold climate. It could cause cracking or flaking.

[@murraymadness4674]

@@spamman007 Perlite does not retain water, it is a sealed rock bubble, same as glass 'microspheres' used in fiberglass work on boats.

[@ursulagallucci5749]

I've wondering about perlite because it has insulation value but it is also a rock so hits the durability and strength button as well. What type of perlite recipe do you use or think you'd need to mix up to be applicable as a wall, structural or non structural? I think there is a company out there doing 3D printed houses using a perlite mix. I don't think they'll be sharing their recipe anytime soon. I was thinking something similar to a cob mix, but replace the sand with perlite rock and add the clay for cohesion (stickiness), straw or some other fiber for tensile strength. I'd love to experiment with perlite!

[@jaimeortega4940]

Enjoyed your content and video! We have similar approaches and feelings about aircrete. My method is the "ice cream sandwich" method using a hard reinforced cement/galvanized metal/mesh form - "the two cookies" or wall and then filling the void between the "cookies" with the styroaircrete or the "ice cream." Decided to use styroaircrete instead repurposing Styrofoam destined for the landfill which is currently being done as a scale model first. This to test the insulative value of the styroaircrete. I am trying to see how little electricity can be used for this. This in an effort to create an inexpensive, durable, low maintenance, real house made out of landfill material for youngsters so that they can either build it themselves cheaply or have someone build it for them inexpensively with little to no mortgage payments. Airecrete Harry performed this experiment and it worked! However, he likes the blow up monolitic domes (very durable) and doesn't like metal or metal reinforcements. Metal though is the key to making aircrete work. This forgiving "ice cream sandwich" styroaircrete method allows for much error since it is merely insulation/filler.

[@radicalgastronomy]

I love how experimentation from varying priority sets allows us to develop these low cost, high performance alternatives. Escape from mortgages is so important. Keep up the good work!

[@kevinhornbuckle]

I am testing a wall system that conforms to these production standards. There are some new, affordable materials which make this type of home construction affordable and durable. The insulated sandwich/SIP process is now viable, I believe.

[@mikescudder4621]

@@kevinhornbuckle Which affordable materials and techniques are you referring to?

[@davefaulkner6302]

So the idea of a hard surface stuck to a softer interior to make a strong form is used a lot -- take surf boards, for example. The strength of surf boards comes from the tension of the fiberglass outer shell pulling on the interior, usually made of soft easily formed plastic foam. The same strength is exhibited in tempered glass, where the tension between the hardened surface against the softer glass interior creates a super strong structure. Your Ice Cream Sandwich idea follows this idea if you can get the outside layers to adhere well enough to the soft interior, giving the whole structure much more strength. I think adhesion is key here as it is this tension that creates the overall strength of the panel.

[@HergerTheJoyous]

What I did was add about a wet cup of paper pulp and about 1 ounce of wood glue to my aircrete mix, for a five gallon bucket and it creates an interesting product. Add shredded styrofoam and it really is a game changer. It doesn't flow as freely as the domgia mix. It also seems to create a more consistent bubble structure throughout the mix.

[@radicalgastronomy]

Nifty

[@analarson2920]

What have you built with it?

[@HergerTheJoyous]

@@analarson2920 I've did an exterior slip pour on my house.

[@HergerTheJoyous]

@@analarson2920 I poured a decorative column for outside of my garage door. Poured the faux stones for the exterior of my house as well.

[@blackwolfspace-cowboy121]

Have you considered using a form of reinforced rapid cure mortar that the foam/aircrete then fills in around to add compressive strength while still remaining relatively light?

[@radicalgastronomy]

I have not. Interesting idea.

[@kevinhornbuckle]

I am working on such a demonstration project.

[@radicalgastronomy]

@@kevinhornbuckle nice!

[@robertschulke1596]

Try shredding your row cover in a paper shredder, and mixing it in with the aircrete. I did something like that with worn out blue poly tarps, cut into 4" squares, and tossed into a cement mixture full of adobe hardpan (free in the California Central Valley). The result was indestructible. Once dried, I literally couldn't do more than scratch it with a pick-mattock. With a roof over it, it will last for centuries.

[@radicalgastronomy]

Nice

[@WhatDadIsUpTo]

I have long been an aircrete fan. I built my own foamer, like you, etc. I think most of my aircrete-building future will center about two words: Tilt Up Nuf sed

[@radicalgastronomy]

Yup

[@kerrywynn1949]

I just love you tube University it’s the best!

[@MaskMasterEsquire]

Very well done Sir, great job at accurately explaining AC pros and cons. It's early days and smart people are busily playing with AC and coming up with innovations. I'm sure you will be one of those.

[@radicalgastronomy]

It’s so close to amazing. I bet we see an industrially produced wall system in the near future. A DIY alternative would be epic, though.

[@MaskMasterEsquire]

@@radicalgastronomy I'm certain the 'powers' will do their best to suppress aircrete innovation. It's just to easy for the average Joe to replicate. Imagine all the insulation products etc that might be superseded if aircrete became mainstream. Here in Latin America that's not an issue so we might see some exciting developments from here. I agree with you though, a mass produced, cost effective aircrete system is achievable. I've got a few things in mind. I'll let you know how I get on. Best of luck with your project...I've subscribed👍

[@radicalgastronomy]

@@MaskMasterEsquire right on. I look forward to hearing of your progress!

[@ryanjamesloyd6733]

I have not yet attempted aircrete, but it is something I am pondering on. I have wondered if the addition of graphine (which should be getting cheaper as a concrete additive if it's not already) would make up some strength. I've not seen anybody attempt that with aircrete yet. I have also wondered, if there was a way to foam "water glass" or a water resistant resin so the bubbles would be hollow, but would cure like a hollow glass bead. No idea if such a thing is possible (I mean, if you heat the water glass, it bubbles up and gets hard- like honey-do carpenter's aircrete rocket stove. But firing a whole panel seems less than optimal. I know that if you got a thick water glass solution, you could probably aerrate the hell out of it and make it foam up, to an extent, I just don't know if it would mix with the cement and reinforce the bubble voids or not.

[@radicalgastronomy]

I’m sure there are many ways a low cost, no toxic panel could be achieved. My interest is in low tech DIY solutions, but I encourage manufactured materials that are superior in cost, performance, and ecological considerations. The water glass thing is fascinating, for sure!

[@RRaucina]

We must share some genes. I have been building with all sorts of mixes of cement and sawdust for 30 years. I did a lot of architectural components like european style window and door frames, on a heavy scale. I always used sand in the mix and typically white cement so that no further coloring was needed. Great videos here. I would never use chopped Fiberglass on a finish coat of plaster, it's just a burden and especially in a lime plaster. But it makes perfect sense in the dust crete itself. If you use a good mixer, you can use soap and get aerated mortar which is highly freeze cracking resistant. My favorite tool is a water mister/sprayer when doing finish work, it gives superb control over your materials hydration. Pity that my work was mostly pre camera and youtube days. Where are your sponges? Great for color coats using lime or white cement and a pigment.

[@radicalgastronomy]

Good tips. I’ll play around with your techniques!

[@jessehorstman]

Could it be used as a roofing material, like thick insulated ceramic style shingles?

[@andrewhuske4607]

Hi, thanks for sharing your adventures in building! With the airecrete process, can you do your dust crete with the added air into panels with tounge and groove concept? You may also explore CAFS units (compressed air foam system) which are used in wildland firefighting to spray down structures with a foam blanket in preparation of impending wildfire exposure. It could be that the smallest units would produce too much foam to make it practical, food for thought!

[@radicalgastronomy]

The aircrete process is laborious, and may not add much r-value to dustcrete, but it’s an experiment worth trying. Personally, I wouldn’t use any product designed for retarding fire, as the chemicals tend to be carcinogenic. I’m planning some trials with clay replacing lime in the dustcrete. This will lower cost (below the $1.28/sf at 8” with the cement) and provide a wall system that I can make without an industrial supply chain. Lime can be made from fired limestone or seashells.

[@andrewhuske4607]

I agree about the chemicals from firefighting, I know all to well, 10 years in the fire service, but the equipment was what I was trying to highlight.

[@ltjon1924]

It sounds like it's a little finicky. What you need to look at doing is modeling your process off of tilt wall operation. Possibly with the Incorporation of a corrugated sheathing material on one side, and you'll definitely want fiber additives for concrete designed to mitigate cracking often marketed as anti cracking. I believe they come in a variety of materials, but fiberglass would probably be the strongest, but more importantly than the material, would be the length I would think. If I was going about it trying to do this, I'd probably start with a corrugated panel, with some kind of threw anchor from the outside facing the panel anchored 60 to 80% of the total depth of the proposed wall, and at the termination of the anchor within the form of the wall I would suspended some form of wire reinforcement to tie it all together. I would probably terminate the walls form for the aircrete below top of the corrugated panel, so I could lift, hoist, and tilt it up into place from anchoring to the corrugated sheathing. If you planned it out, you could probably work in a tongue and groove system into the sheathing if you left it intact, or you possibly could use a form release and unbolt the anchors after it set in place and reuse the corrugated panel. If you plan to remove the corrugated panel, you would probably want an additional layer of wire set on the bottom against the panel. You quite literally might be able to get away with simple chicken wire. Also, I think I've seen someone do a version with recycle closed-cell styrofoam ground up and mixed in instead of phone. Might be a little more consistent then the foam.

[@snowballsvlogs621]

Just a thought have you thought of using dust Crete with polystyrene balls in it, say 25% to combine both materials without the bother of foam.

[@eugeniliesiu5276]

I will use aircrete as a layer of insulating mortar on the brick walls, on both sides, interior and exterior. I bought a foaming device and I will begin soon with some trials.

[@radicalgastronomy]

Best of luck!

[@MadRat70]

Cement bonds to expanded bead foam, so there is that option. Maybe your dustcrete in a honeydobagger form would be a good strategy?

[@radicalgastronomy]

Perhaps

[@trakeespree]

I found out by accident that 0.125mm metal window screen mesh sticks to aircrete really well. Maybe you could give that a try.

[@spamman007]

That might also work as a Faraday cage to outside EMF. One possible problem would be cell phone reception inside.

[@KaliShabazz]

Great subdued demeanor, excellent command of language expression. I so enjoyed the information and presentation for me completely effective. That said I would like to purchase some undeveloped land around or in South Carolina, New Mexico or the U.S. Virgin Islands w/out a third party to inflat purchase price. Thanks and thanks also to You tube Creator

[@Pww642]

I know this is beside the point, but this dude has the most transfixing eyes. It's like looking into the sea.

[@peterbeyer5755]

Check out styrocrete, shredded styrofoam mixed with concrete, fibreglass fibre, foam. Very interesting high insulated minimum frame and cheap building.

[@ljg5511]

From what I understand the R6 may in fact be wrong as it was achieved by using non ASTM testing techniques that have not been verified. R 3.5 - 3.7 seem more likely. 3.5 is still not too shabby. I also wonder if skinning the panels with hempcrete or straw reinforced concrete would do the trick of making a sip that can be moved without cracking

[@radicalgastronomy]

You are correct. R 6 is not accurate. I doubt hempcrete would not crack, but straw concrete could work.

[@user-qb6hj2dz6u]

Which materials included in this foam.

[@quovadis5172]

Very interesting and informative. Respect.

[@DrJohnnyApocolypse]

Mylittlehonestead had a great idea about building with superadobe earth walls which they then plastered on aircrete tiles they made in hexagonal forms, I suppose they did it for a cheaper faster finish to the Adobe walls as well as the insulative and even acoustic properties of an aircrete plaster finish while maintaining the compressive strength and mass of the earthen walls. I’d say meet somewhere in the middle maybe some square meter sized panels, I’ve also wondered about adding microfiber reinforcement to aircrete mixtures but It’s just an idea for now

[@radicalgastronomy]

Interesting

[@matthewmccartney3926]

Do you think dust create would be strong enough to make 12in raised beds?