i like it, go on :) think this is the most effective form for a mold on this material?
i dont know about the form yet, working on it
really interesting idea.
Give them a structure and then cover it with what they have.
You could study more basic forms and recommend some coating materials, depending on how much they can spend.
I am working on that. thank you for your comments
very interesting concept, good start bro.
thanks my friend
This has a lot of potential. How will the mold be removed once the cob is up? Could you use one mold to build multiple houses, thus reducing the cost per home?
Thank you for your comments
The mold should have the feature of being easy to assemble and disassemble, or inflatable or retractile... still dont know.
As in the concept description says, you could use the mold several times to build more shelters or make more "rooms"
nice concept! The mold could be inflatable ; )
Yes! Thnks, i am considering that option
wonder if there is a way to remove the mold so it can be reused - maybe it could be inflated/deflated to enable it to be removed from through the doorway.
Nice Idea! Nearly round and on the top a round window or solar - like my.
But you must stoop (in German "bücken") that you can access the Iglu.
How you can get the mold out?
You use earth or concrete? This is a earth-Iglu!
You can never stand in this, or?
How many square meter?
let us see, man.
ironically, I think this is much cheaper than $300
let us see...
The complete Idea make no sence. I dont understand why you get 7.8. Here must be something wrong in the Voting-System.
don't be so envious.
they have voted for the concept, the idea is still under development.
+++++++++++ UPDATE ++++++++++++++
The mold is made with modular pieces, in this case triangles.
After the house is finished, you can take away each triangle and store it somewhere.
I am thinking these triangles shpuld be made in some kind of waste mix material. Durable, resistant and strong to stand the weight of the cob. Design of the modules and procedure to assemble them is stil under development.
what do you think?
try another method of construction. the dome thing could be cumbersome, but what if you had an "umbrella" principle?
Yeah, umbrella principle sounds very interesting. Will work on that. Thnks!
i think not. a geodesic dome is not free standing until nearly all modules are in. you'd need to rig up some complicated scaffolding. so an amateur crew couldn't assemble it. also, depending on material of construction, the sunny side expands faster than the cool side. so each day, the heating cooling cycle causes cracks to from in the waterproofing. this is the reason people gave up on these domes which have been sold as kits since the 1960s. they need constant repair and maintenance. lastly, you assume all those triangles are equal size and shape. guess again. has nobody on jovoto got past the fifth grade?
Hello Teigan, thnks for your comment.
First of all I dont like your degrading coments. If you feel so frustrated about jovoto pataform and all of us, just quit it and that's it. There is not need to attack people with comments like the "fifth grade".
Secondly, your point about the difficult way of building the dome is good stuff. I'll have to think about this issue. I really believe it can be solved so that an amateur crew could do it.
Then, I am not planing to use the dome like a shelter, but like a mold. No need to expose the modules to many cooling cycles. I am more worried about the chance that they could fail when standing the weight of the house material.
Lastly, I didnt assume anything about the equal size and shape of the triangles, nor the measurements, nor the number... What I did say was that this CONCEPT is still under development. So let us see how it goes. There's still time.
well that dome would not be structural enough to hold up anything more than its own weight. so you should be looking at tensile structures like eartharchitect's wigwam to use as a mould. in general, you will need it to taper steadily as you go up in height.
I like this. My question is: when the mold is removed, would the remaining material be susceptible to collapse? Earth or concrete would wear and fall down over time.
that would be agood point. Let's see if we can solve it.
Thnks for commenting!
look at structures in the middle east for the answer to this question
To let you know, middle east domes are made of mud bricks and not cast-in-place. the structure method is completely different.
look at geodesic domes
a lot of them have been built with inflatables and concrete + steel structures
Well Bucky got everyone going in the 60's with his geo domes but... they never really worked. This said, there may be some practical design applications in the original design that could be expanded upon. Good for you for digging up the past...now just make it a little more forward thinking!
My idea is not the geodesic dome as the actual shelter. Look again. I think my concetp is clear enough. The dome is just the mold.
yes, I understood that it would be a mold...what material would it be cast in?
casting is not cheap and often the materials such as rubber or plastic are not people friendly. perhaps concrete would work for you - but heavy to move.
I like how you are thinking - repeatable systems...but just not convinced yet!
honestly, I think this is my favorite. Once you have the mold, whatever shape it is, its is going to cost nothing to make, fast, and if it doesn't take long to make just make another and another, like a COB igloo.
Exactly! that is how i really want it to be. I'm glad you liked my concept Cameron. Thank you so much!
The igloo is a variation of the wigwam - very economical - spray on urethane insulation would work on the inside of the form with a plastic film as release agent - when the form is reused, the plastic acts as raincoat - I suggest an oculus in the center for light and air and cooking fire flue - and maybe an arch entry like a true wigwam that you drawl through to enter - easy to defend
How about floor? and insect proofing?
You are on the right track.
Thank you for your nice comment, feedback and ideas. I will be considering what you said. Iff! there are many things to take care about! haha. Cheers!
I can make this a lot easer on you
Thank you for your post.
But, after watching the video how they build this domes I was more convinced about thinking that inflatable option might not be the solution.
+++++ LITTLE UPDATE +++++
I uploaded (slide 5) a quick sketch of a metod I have in mind for the buildable mold. It should be some modular stackable pieces and within their joins, there should be enough structure to support the cob or other materials.
WAIT FOR DETAILS!
Now is slide 3!
I'm curious if you have thought of the following:
How you get inside the dome to remove the mold once the cob is in place?
Then, how do you get the mold out? Will the oculus be large enough to remove the mold pieces? When your idea was to use triangles, I could see how they could be disassembled and removed through a small hole.
How is the door going to be fabricated, and how will it operate?
What is the scale of this proposal? Rectangular furniture such as a bed is not easily accommodated by round walls.
I look forward to your clarifications.
Hello, thank you for your feedback. It is very usefull. I'll be updating this proposal trying to answe your questions!
Great start, you got an intriguing approach here, oxelot! As everybody already brought up a lot of questions, there's only left to ask - did you think about access to water and electricity? Looking forward to your updates!
Thank you so much!
about the electricity and water I have updated it.
+++++ LITTLE UPDATE +++++
I am still solving the issues, but I updated some of the result's I have been getting.
I'll be gald to read some feedback.
if the mols is madewith a good material, and the owner is too lazy for cover it with cob, and if they dont want to stay there for such a long time, hehehe, they can just use the mold as the actual shelter. : P
wow love your concept!:)
Ah! thank you so much Boni, really apreciate it!
you are all unqualified to rate this. as i've already stated, a geodesic dome can not withstand the load of the low cost local material placed on it to dry. i had also pointed out that it isn't self standing during the assembly process. placement angles must also be precise. oxelot's ignoramus approach is counterproductive to the task and anyone who's actually put together a geodesic dome can confirm that. an inflatable membrane that size would again be expensive, and the air pressure required could only be produced with a huge air compressor. his idea is essentially a more expensive and time consuming way of making an igloo.
I dont think the mold needs to be self supporting - a number of different options exist to support the structure inside.
the only requirement I see is that the reusable mold components could be removed.
so keep going.
Glad to hear that. I think I'd experient with some more shapes to see what results I can get.
Thank you for the support.
Sorry, plastics technology is not what a home should be based on. Try to think of natural, indigenous, materials. Not one which expand our reliance on petro chemical projects. I see no redeeming factors in this design other than placing communities at the mercy of the petroleum industry which has always been less than charitable to the worlds most disadvantaged.
To bring people out of poverty think of how to incorporate the 100 mile rule.
I disagree with this...burning hydrocarbons is most wasteful and unsustainable. It is better to convert hydrocarbons into materials that will last very long and be recycled at the end of thier life-cycle.
plastic is the most economical way to reach the $300 goal. how ridiculous to insist starving and shelterless people go "green". they have bigger priorities. don't force your trendy beliefs on others.
I liked it!! it seems plausible!
i super duper love these forms! and my form is very similar to both of ur designs! the mold thing is super handy! it could be made from hemp resin plastics and have one and one solar powered(or something)compressor sent to each village .. i love that string stuff too in the link. made out of rock! thats neato. if there r allot of loose rocks to use (mining mountains i think is not sustainable and is destructive) i would so love to work with both of u we r almost in the same mind. i think! :)
wind or water compressor! :)
++++++ UPDATE ++++++
a simple shape coming from laminar modules. Laminar standar pieces allows the model to be build in the material that is best for region.
The shapes and again the laminar feature allows a better transportation of the unassembled mold.
The joins between the modules (since are perpendicular to the main face) serve as structure to hold the whole structure. Still there is the option to put a pole in the center to hold the structure meanwhile building it.
Door, windows, electricity and water supply (holes in the center of ceiling or walls) can always be added meanwhile the building procedure.
Note: I also added small description of the other mold concepts.
I think the mold goes inside & the substrate COB is built up outside. Am I right?
So with the exterior built up, dry, solid. Explain how the panels, the mold, is disassembled. In my mind it would be impossible to pull the panels, the first on anyway, without destroying the panel.
My next concern is with the flat packaging. When I envision folding up the edges that would remove the curve.
Sorry, I really do hate plastics but if a plastics plant was within 100 miles of the construction site I would say, "go for it".
I don't think this design will work.
But, where are the panels built. Anyone designing a product with shipping as a consideration is missing the point. We don't want a new roof over the poverty, we want a housing project which will engage the poverty stricken. After building "their own roof" we want them to take the design to market & sell the concept, product thus lifting themselves out of poverty.
If I´m right your mold is pretend to be used with a local kind of mortar or adobe materials, if not please correct me. If it ´s that way, the dome shape was the way to go because it addresses the loads straight to the terrain if constructed propertly, but in your new shape a mass material construction without reinforcement wil not hold in the slope panels when you remove them, but may be this was your purpose. But if a radial reinforced is gonna be used then the mold becomes secundary because it´s aneasy shape that just with plans can be erected.
For me the dome was the right choice of shape. About the mold concept I think it´s a really solid idea.
What about a infltable mold, that could be easily removed ?
Hello, you have all right. I think i'll come back to the domes and now the inflatable mold is my option. Let see how it works.
i was also thinking an inflatable mold is an option. it would be easy to remove, and easier to transport to building sites. less cost for freight.
there may be some more inspiration here:
Great concept Oxelot. Good luck!
+++++ UPDATE +++++
Maybe the best option could be the inflatable mold.
there should be one per comunity with the respective compressor.
Besides the mold, I am thinking about a structure of some brenches or metal bars that you would put over the mold, before the cob.
Deinflate the mold and add a last layer of waterproof material to protect the cob from outside.
door and windows should be located in the mold so the cob would copy the volumes. Then could add the bucks
I ll be updating the mold.
great idea oxelot. the mold idea is reusable and shareable. one mold could be shared amongst a community.
Exactly! thnks for your comment!
i really like this idea, because the mold can be reused over and over again to build an entire community if needed.
great that the concept is understandable.
I apreciate your comment. Thnks.
Oxelot, you have a neat perspective in giving a community the wherewithal to build.
If you're building an inflatable mold, couldn't it be in another shape, though? I could see this in a simple gable shape.
Domes have historically not been well received in many locations. Slum dwellers want their biggest purchase of their entire life to reflect on their family's status and neighbors. Paul Oliver in Dwellings tells of disaster-stricken communities where domes were not even used for housing animals.
And did I miss the cost estimate somewhere?
I tried different shapes befre, but as Flegido said above, "the dome shape addresses the loads straight to the terrain" and this would avoid the use of expensive inner structures. Like igloo.
About the cost, the house itself could be even less than $300. The most expensive part of this is the mold and compressor, but there should be many ways of arrangement about it, to quote some: what if the goverment provides them? what if an altruistic foundation provides it? there are many options.
You should have real costs. For this project you can't count on other peoples handouts.
I wont spend my time searching for the prices and the best compressor or asking how much is an inflatable mold. I think the important think is that the actual building could be cheaper than $300...
Don't forget that part of the project is knowing the cost, not just guessing that it could be cheaper than $300. With the internet today it would probably take 5 minutes to find out how much this would actually cost. And then we could all know if this project is within the criteria. PS. I love cob and think it is a great material and believe you have chosen well. This idea could help to produce cob homes more rapidly. However, on the otherhand it might turn out that the cob is not as sturdy via this method. It would be cool to test it out to know.
I like the idea with a inflatable mold very much. I think it is the most fast way to build with.
You could first put a thin layer of geopolymer plaster to make it strong, like an eggschale.
After that some material from the area with some insulating qualities and after that again a strong layer of geopolymer to make it fire and waterproof.
For me the domform is the best shape there is for small and safe houses.
Thanks you sooo much Conradius, I actually included your suggestion in the proces.
My gratitude for that!
I like the idea that people could help themselves with your design. I would certainly prefer to live in a mould home than some of those used by disenfranchised populations. On a lighter note could bouncy castles be used to make larger buildings? ;-)
hahaha... could work that about the bouncy castles.
Good concept here...good luck!!
thnks a lot
I wanted to know how you will add the windows and doors? If using Cob or Adobe you will need to set these into the wall. However, your dome is in the way than I am not sure how you will incorporate thes aspects.
check out the slides, as you said, "If using Cob or Adobe you will need to set these into the wall"
if it is not clear enought my appologies.
In the slide 4 the proces is about having the windows/doors bucks or frames ready and placing them even before the plaster spary. Tape or wire/strings could be use to inmobilize them. After the building process is finished and the mold is taken away, the bucks/frames would remain IN the building material.
really innovative idea. How to baloon a shape which has to have flat base? Any stiff frame/floor fixed to the ground? How high has to be the air pressure to get the mould stable enough? I find this idea technically very challenging but very interesting. Would be amazing to try it.
I think this could work easily cause I have seen how they do it but with different building materials.
brilliant...1 mold per community, love it, everyone helps to make the process go quicker, so they can get to use it afterwards good luck
thanks a lor furnituresig
They've been making bladder houses for over fifty years now.
Your idea is the first one that I've heard about that didn't use concrete and reinforcing steel though.
It was a serious observation. The way bladder houses have always been made is with reinforced concrete. There has to reasons they used reinforced concrete instead of earth.
What makes you think that your system will work without the strength provided by the reinforcement and concrete?
Look at the dome houses in the competition that are built with earth bags and blocks. Compare their arc to your own.
I just can't see how your arc is supportable using only earth. Help me understand, please.
I'll answer you in your next comment, down.
You might want to google Dave Pennington in Richardson Texas. He has two bladders, a twenty footer and a forty footer. He has something better than that though. He has a proprietary formula for concrete that uses styrofoam for aggregate. It is tough. One of his requests of visitors is to hit his dome with a large sledge hammer. They can't damage it.
He says a bladder can be used hundreds of times before it wears out.
Because of his proprietary mix he doesn't need rebar and he cuts in windows and doors with a chainsaw.
It is a pretty trick system.
Thnks, but do you have any more specific information about him? cause I googled his name and Richardson Texas and there were many results. No time to search for him.
I sent you a private message with his contact.
Keep in mind his method has a weight of less than two pounds per square foot of roof area. Yours has ten times that. His method uses an adhesive made with a polymer. Yours has no adhesives at all.
His idea isn't a fantasy.
Any way I can get the contact info for Dave, also? We had looked into something like this and were considering building with it.....but this is exactly what we were looking for!!!
Very interesting idea!
thnks a lot!
childish approach for a global problem.
sorry, but you make me laugh. Instead of bashing and making self centered hatefull comments, why didnt you submit your own proposal to this contest ??
i m sure it would be the BEST ..... ;)
childish approach? still better than your approach.
Oxelot, have you ever built one of these?
The reason I'm asking is because you suggest unreinforced earth as the building material.
Everyone else who builds these recommends reinforced concrete construction.
Have you built one?
I haven't built any.
I saw a lot of examples, I checked the page you suggest and what I could say is if we need structure, we can put one before the building material, after the geopolymer spray. Why are you so worried about it? Take it easy :) . That's why we have the 2weeks workshop ahead once we got chosen. If it does need it, we add it, that's it! :)
On the other hand, the igloos dont need that structure, right? So I think that if it is necesary, we can come up with a very simple and cheap one.
In the slide 16 (4th after the "old" sign) you can see that I actually considered an structure.
All the best.
It´s exactly the same than Luke Skywalker´s home in Starwars http://www.themarysue.com/luke-skywalker-house/
It sure looks like it doesn't it?
oh yeah! hehe
This is a really intriguing idea. This concept can be used fo a lot of things including houses- like making cisterns or levee systems. Cementicious materials are great but formwork is such a waste of material/ labor. This really adresses that. Kudos.
Ey thank you for your comment.
But I got confused. This idea addresses formwork? what do you mean? There's not formwork at all, but doors and windows frames. Or did I understand wrong?
haha- i am complimenting you on the absence of traditional formwork! this has the potential to solve the problem of wasting wood or other kind of slips to make poured/sprayed walls
Interesting. But I doubt that this house will last. Although you built it using an arch profile which is a strong structural form, the thickness of the walls using the earth, will definitely be inconsistent, thus making the structure quite weak; plus the fact that you need to maintain the house from becoming a big chunk of mud during rainy seasons. I'm afraid that it's not so easy to plan a small house that will be built. Your idea is interesting, but I think you have to constantly review and research about construction techniques and materials. :)
Thnks for commenting but I dont find your arguments logical.
First, I never said anything about wall thickness. Logic tells us that they shouldn't be that thin, I dont know why you suppose that they would be thin in order to be weak. If my sketches make you understand that, I appologize.
Second, if you read my descripcions you'd know that rain wont be a problem with the geopolymer layer as coat (Check slide 6).
So as you can see, my proposal is more feasible than you think.
Hmm. Well, in the first place, thickness is important in constructing such structures; so you should have considered it. Even thickness of mud all throughout the structure is not good. There is a standard thickness of that material you're using depending on its physical and structural capacities and not just determined by your common logic.
I would like you to know that by convention, the thinnest layer of mud should be placed at the top; or maybe it should not have any mud at all because the stress on that part is high. The Italian domes (e.g. Pantheon, and Brunelleschi's dome) were built in such technique. I can see that you do not even have a ring keystone. The earth bag houses are more stabilized than exposed ones because the bags are holding the soil. Yes, the geopolymer coat is a good solution, but what happens if that coat goes off?
Don't get annoyed about this. I'm just sharing my thoughts about your entry. I find it interesting that's why I'm commenting here. Thanks.
Kingfish is right, even with variances in thincknesses you've got to watch for it as thickness changes result in different stresses in the material as it cures resulting in cracks. you'll need a reinforcement specially at the base too think about arch structures they tend to push away from the center. Also as much as I'm liking the geopolymers you're applying it as if it were a superficial plaster coat, it doesnt seem to work like that you need a formwork to hold it both ways that holds it compressed while it is curing (watch the useful video posted by Owen Grienger(? I believe?)
otro muy buen trabajo, buena suerte...!!!!!
it's great but only for some particular spot
no matter if technically it works or not, i really like the concept of the project, the shape of the houses, the idea about how to make the structure strong... the inflatable mold concept is really creative (letting the technicall aproach aside), the idea of a communnity with these mold houses, built in such a practical way, is great... it's interesting too how you replied to the comments, glad you win here with your other idea, nice work!
¿ is it posible to build this house, or a couple of them, say two or three, in southern spain ? firstname.lastname@example.org