Foaming agent woes


  • Major Contributor

    @joeboy Have you tried looking for Sodium Sulfate? Aircrete Harry discusses it in his video https://www.youtube.com/watch?v=rY-oHAYjQ1E and listed it as almost as good as Drexel FM 160, He bought it for $8/lb off Amazon. I bought it for $40 for 40lbs from Duda diesel.


  • Little Dragon Tamer

    @gemniii Have you tried out this Sodium Sulphate yet? I see that it's labeled Sodium Lauryl Sulfoacetate in the video.



  • @zander just regular stuff called NET. No sign of anything good in it.



  • @zander also anything by post the cambodian customs decide is valuable you get stung around 200 percent of what they think it's worth or your not getting it. Simple as that.


  • Major Contributor

    @zander Good catch at 4:24 in the video. Then Harry went on at 4:47 and talked about Sodium Sulfate.


  • Major Contributor

    @gemniii Just tested my "sodium sulfate" it is NOT a foaming agent. Sorry for misleading anyone.


  • Little Dragon Tamer

    What do you mean by this statement?

    No sign of anything good in it.

    When you wash dishes does NET make suds if you swish a fork in the water? Put some in a glass with some water and slosh it around a few times. Do you see bubbles?



  • @zander yeah it makes foam for like 5 minutes that collapse. I have been putting all the different types of handwashes and shower gels and dish detergents in water bottles with a little water shaking them up and watching them and timing them. The hand-wash is the best so far the rest is sh*t. I did find putting a little bit of soap from my shaving stick in with the hand wash was awesome but I can't get shaving stick soap here the Cambodians don't do that luxury as they don't have much of a beard growth anyway.



  • @zander the no sign of anything good is in the ingredients no lauryl or laureth or anything of that nature. I would imagine that the companies want the foam to go away so it washes down the sink. If the foam wouldn't break down it would be a pain in the ass trying to finish the washing up.


  • Little Dragon Tamer Major Contributor

    @joeboy Brother joe putting it into water bottles and shaking it up is not going to give you in any way an accurate measurement. I have to be frank! I have been watching your comments the last few days and I get the distinct impression your playing a silly childs game. So in order to politely put an end to this percieved nonsense Let me attempt to try once more to put you onto the right track. One: If you have the little dragon. Follow the recipe mix the ingrediants as instructed by the instructions. Two: Turn on the dragon and adjust the airflow until the required foam weight is reached. Then If you'd like let it sit and measure the amount of time it takes to dissipate. When you find the one that suits your desired need then mix it as required. If you do not have the dragon (Assumeing you do) then go get one if you do not have the recipe then go get the handbook. Its truly a small price to pay for the know how. Outside of that there is the workshop. Truthfully there is not much more that anyone can tell you. It works I work with it and am well happy. I also follow directions which is most likely the fastest and best way to get desired results. Good luck in your project whatever it be. Cheers Joe


  • Little Dragon Tamer

    @joeboy I think you are in the position of not wanting to invest in the foam making equipment until you feel confident that you have access to a viable foaming agent. That makes sense. Could you ship to me some 16oz samples of these products, especially the NET dishwashing soap so that I could test them out for you? I would attempt to make foam with these products and if that worked I could attempt to make aircrete with them.



  • @brian-spooner silly child's game. I have my land and my generator on its way you have delusions of grandure it's seems. How about go fuck yourself.



  • @zander cheers I will sort something out I have a few good mates here from the UK who are looking forward to this project. I can't be arsed with arse hole comments as above I will put some videos of my build on YouTube I won't be back on here. Cheers.


  • Little Dragon Tamer Major Contributor

    @joeboy You might have noticed, I was polite but firm in my reply. No delusions at all here. I have only pointed out what is. Unfortunately And I definately hope this forum will not devolve into such you resort to a very blatent insult. I think Zander has made a good offer you should send him some samples of the products you are trying. I feel that we have tried to do our best in every comment and reply to help you get it figured out. Outside of this I dont think there is much more anyone can do for you. Good luck on your endevors in Cambodia.



  • @gemniii Did you get good foam and successful aircrete with your SLS? I bought some and our bubbles don't last longer than one hour... Would love any help from someone who has actually made aircrete. Thanks!


  • Little Dragon Tamer Major Contributor

    @abra Hello abra. The basic recipe for good aircrete gives details on foam weight. After asking specificly I feel comfortable in reply to your question.

    The Recipe is very simple one 94lb bag type I/II portland cement. (TIP) many people are thrown off with this because it covers type 1 and 2 both. This is in fact type 2. It covers both 1 and two building aplications.

    Pour 6 measured gallons of water into a suitable container. (We use a 50 gallon poly drum here. We mark the 6 gallon point to help speed the measuring process. We also have a mark at the 48 gallon point. This helps us to keep each batch uniform...

    next we pour 5 gallons of water into a five gallon bucket and measure out One pint of Seventh Generation dish soap which we pour into the water. We then attach the little dragon to our compressor and turn it on. We capture the foam in a 1 quart container and weigh it on a scale. Adjusting the air flow from the compressor down from 90 P.S.I. until the foam weighs 3 ounces per quart. This generaly occurs at 80psi.

    Next we pour the portland into the 6 gallons of water stiring until the mix is uniform and any clumps are no more.

    We then turn on the littledragon and mix continualy until we reach 48 gallons. The foam is injected useing the mixer paddle. Once you reach 48 gallons you are ready to pour your finished product into your form.

    In my experiance as long as you stick to the recipe you will have good results. You can find several recipe's in the Student Manual. I have not tried them all. I hope this helps and look forward to hearing how your progress developes.... Cheers



  • @brian-spooner Thank you for your well detailed response. We did everything you say here except that the air compressor was at 100psi but the little dragon was at 90psi. We dont see how this would make any difference... our foam weight was 3oz but the blocks of aircrete lost 2/3 their volume and the end result was crumbles you could break with hands.... So you have done this process and made good strong aircrete? Do you pour blocks or what?


  • Little Dragon Tamer Major Contributor

    @abra hello, the compressor is fine its the pressure at the little dragon that I reduce. yes I am currently makeing blocks for an upcoming build. I have made a couple vids one I just posted yesterday. The first pour I did produced blocks and I did not loose any volume. These were as you say not up to what I initialy expected. However in the second pour I misted the aircrete as it set quite often and covered it with a tarp. The result was good strong aircrete. We are now developeing a new form which kind of reminds me of those old metal ice trays. I think its also a good idea to take your time before breaking the block out of the form give it time to set up. you can view the vids here in the general discussion. As to the differance. there is definately something in making the weight of 3 oz per quart. but the only other thing I think is important is to work fast get it mixed and into the form dont let it sit if you can avoid it. Hope you have better results

    Oh one other detail that I think is sometimes over looked dont forget to prime your pump. and keep in mind at the end uf your build you also apply a fabric reinforcement.


  • Little Dragon Tamer

    @abra said in Foaming agent woes:

    I bought some [SLS] and our bubbles don't last longer than one hour...

    Bubbles lasting a whole hour is not bad. Seventh Generation foam rarely lasts that long sitting around in a bucket.


  • Little Dragon Tamer

    @abra said in Foaming agent woes:

    the end result was crumbles you could break with hands....

    How long did you let the aircrete cure before breaking with your hands? Most aircrete crumbles in the hand for the first several days and sometimes even a couple weeks. The true strength of your aircrete can not be determined until one entire month has passed.

    Abra, I'm sorry to hear that your aircrete lost 2/3 of its volume - that's not fun. It may take a few or several tries. I suggest practicing with smaller batches until you get the result you want. I say keep your foam density between 3 and 3.5 ounces per quart. I consider 3.25 ounces the best, with 3 and 3.5 on the extreme edges.

    One of the biggest issues I am noticing with myself and others is foam density fluctuation. When you are making foam (while testing and while actually making aircrete) keep an eye on the air gauge of the Little Dragon to make sure it is correct and that is not moving. If your dial is bouncing around more than 5 psi then you may be creating foam that is poor quality. This is most likely due to sharing electricity with other applicances. Keep your Little Dragon on it's own cord, and try to plug it in to a circuit that is not running your mixer, or air compressor, or other major appliances.


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