Alternative Material to tires

Hi everyone. I was curious if something know any kind of alternative way to build the back wall from other material than tires. The idea is great, but because of lot of work that you have to put to do it I am a little bit scare to do it.
I am from poland and here is a company they call Dom3E and they are doing some lego blocks out of Perlite. I was already speaking with tehm and tehy see no problem to put it into the air. What do you think about it?

Hi Marcin,
I think you meant to say "putting them in the ground"?

I'm not an earthship expert, I'll say that up front. I think you could absolutely use something like that for insulation, but I doubt it would be strong enough by itself for a true underground structure.

I think one could take the principles from an earthship and make a structure that is well insulated, and needs very little to no input. Is it still an earthship without tires? I don't know. There are many underground and bermed structures; for instance, the wofati. See the posts here on Permies.

Cześć Marcinie,

What is your objective here? Do you want to have:
-thick walls
-walls made thick by berming them with dirt
-walls for an underground part of a structure
?

Poland has such an AMAZING selection of masonry building materials that you will definitely find anything you want.

Cześć Cristo

Well I am looking for something to do fast in cold climate in poland. I mean perlite is not a bad stuff
well the back wall is an underground wall but the tire work is really a killer. It will take lot of time to build the back wall under 3 months I think  I was searching for something what I can do quite fast. this perlite stuff is very easy stuff that has some good properties. But maybe I am wrong
I know adobe is collecting very well the energy and gives it back at night. Perlite doesn't.
but in winter we dont have lot of sun in the part of poland where I am going to build so it doesn't matter. The rocket mass heater has to work
In sommer perlite solate well the heat

do you have some other advice maybe. I would be happy to hear something

I would not like to do adobe or even stabillized adobe in Poland. Someone said that fired brick has properties of adobe without having its drawbacks - which is sensitivity to water.
I'm a little bit cautious with perlite - my intuition is telling me that in 20-30 years it may become new asbestos :), but nonetheless I have used it for insulation of my chimney ducts set within stabilized adobe chimney.
Also for the wall that has contact with ground, you need a material that can handle moisture well, otherwise you will have to waterproof a lot and eventually it may fail. If I had to do anything underground I would choose: stone or solid clay brick (but rated for moist environment) or concrete. These three materials proved to work. Quarries in southwestern Poland have wonderful selection of granite blocks (I wish I could get them here).

If you want it fast (is it temporary?) then I would go with popular Suporex or beton komórkowy instead of perlite blocks.

Lime stabilised soil, which is covered elsewhere on the site will not degrade with moisture.
BACK to tyres, if you cut one side out so you are left with a cake tin shape, the work is vastly reduced.

John C Daley wrote:Lime stabilised soil, which is covered elsewhere on the site will not degrade with moisture.
BACK to tyres, if you cut one side out so you are left with a cake tin shape, the work is vastly reduced.

I agree, lime stabilized rammed earth with a slight batter should suffice as a backwall.
Do you have any pictures or references for the cut tire? That also sounds like a great idea.
I have also seen examples using shipping containers for the structure.

Shipping container walls can colapse in with even a small amount of soiul piled against them. Be careful.

probably not the super quick solution you're looking for, but I've always thought earthbags would work well to replace the tires to save all the offgassing. Does anybody have thoughts or experience in that regard? I feel like I saw something on here about it once.

Is there off gassing ?
This report mentions in reality it is a myth!
tire-offgassing/ true or false