@Zander Thanks, it was a good article I will try out the acrylic bonding agent if I cant get the latex one. I have been very succesfull using your recomendations so I will continue to do so, but like you said it isnt bad to try new things.
Posts made by juanconhambre
Air Mortar Recipe
I am going to be using the air mortar recipe as per Dome Gaia favourite recipes, but I am having a hard time finding the Sika latex bonding agent or any other one like it where I live. I do find lots of acrylic bonding agents for concrete. Would they work the same way than the latex one?
Anybody knows if the chemical composition or how they are made will do much of different for the purposes of joining bricks and infusing the fabric to cover the dome?
RE: Foam Recipe
I live in Canada and I cant get Drexel, I tried Dawn and despite getting the right weight on my phone I never got the foam to last long enough to get good aircrete. I have been using a similar product to Drexel called Trekker Trax, is a lot more expensive than drexel but it has allowed me to make good aircrete so it was a good buy for me in Canada. I have been playing with airecre for a while and I have found that there are more than one factor that will affect your aircrete quality other than foam density. For example for me one big factor is the speed and time it takes to mix the foam with the concrete, I found out by trial and error than at high speed mix is best but also it was to be done quickly, the longer you mix the more you break bubbles. Another important thing to keep an eye is that your compressor is keeping up with the air pressure throught the whole foam making process. I have a smaller compressor rated for 2.7 cf of ir at 90 psi which is what Hajar recomends but it does not keep up for a full 50 gall bucket mix. So if you start with good weigh foam but it later gets lighter you wont notice by just looking at it, so I always keep my eye on the little dragon's pressure gauge, if it goes below 85 psi I have to stop.
Finding the right foam agent is crucial but it is not the only thing to get good aircrete or to avoid collapsing...
RE: Pumping Aircrete overhead?
I think Aircrete Harry (on youtube) has done something like that he is trying to do a monolithic aircrete dome and he uses some sort of pump to fill the two airforms. I dont know exactly how he does it but if you search through his videos you will find it.
Hope this helps
Joining aircrete bricks and covering dome
Hi everybody, I just wanted to know what are people finding is best to join the aircrete bricks together when making the dome? Are people using regular cement, a modified recipe of aircrete with less foam or some other bonding agents like tile cement? Also has anybody used anything else than the roofing fabric to cover the dome to reinforce it? Is the fabric infused in regular cement or aircrete?