Ultra-thin concrete roof
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- Опубликовано: 21 авг 2024
- Researchers from ETH Zurich have built a prototype of an ultra-thin, curved concrete roof using innovative digital design and fabrication methods. The tested novel formwork system will be used in an actual construction project for the first time next year.
Read more: www.ethz.ch/en...
Thank you for posting the full show of construction by the 3DP
it will be good to see how it has perform so far ....
Very nice, i hope to see more of this in the future.
you you may consider using a foamcrete sandwich layer in order to obtain insulation and a bit of thermal mass. An outer layer of high density concrete will create a composite structure, allowing for dynamic live loads. The first laver onto the fabric can be white cement concrete, avoiding the need for painting the underside of the structure.
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and at 1.2 million dollars, this prototype is surprisingly cost effective.
EFFECTIVE??? are you crazy?
@@brurokpariwestreaus2219 I hope he was sarcastic
Holy shitballs. I could have done the formwork for that for a lousy quarter million. Wood carved by hand covered in wax.
Здравствуйте!
Испытайте пожалуйста на прочность при попадании в плиту из uhpc бетона авиационной против бункерной бомбы (gbu 28), какая толщина Вашего бетона не пропустит её насквозь???!!??? Обязательно чтобы бетон был армирован микро стальной фиброй. Благодарю. Я тоже делаю подобный бетон, но работаю один. У Вас возможностей побольше!) А вопрос сейчас актуален как никогда. Если результат будет, то этот бетон у Вас купят для укрытия богатые люди. Мира всем и добра!
По виду очень дорогой получается
Felix Candela was doing thing like this 60 ya. Great design and initiative anyway. Congrats
In use as a roofing system, how do you make it fully waterproof?
Thank Sir 👍😊
so...where is the finished house?
That's a classic it has a thin roof cover now? 2345? 🙀
Sehr schön
oh nice, how much ?
How is it better then ferrocement as a roofing alternative? This method seems quite more expensive then ferrocement though it might be more load-bearing
perhaps because part of the design spoke of tensioned cables? the flexibility of a net overlay might enhance structure significantly ?
can do this with lathe, ferro cement, basalt mesh....leave it to the Swiss to over think it.
Hey....do you guys have any branch in India????......i would like to ask you if you could do the construction ...if i made the design....and gave it to you......do you have any people in India to do your projects liek these???
Love it.
Curved thin shell roofs have been made in the USA for decades now. Glad to see the EU is noticing this tech. Although they are using inferior internal reinforcing material. sigh
Ferrocement has been used in the 70s in large numbers of homemade boats. This in Ferrocement would have cost a few thousand. Instead this cost 1.2 million.
@@OffGridInvestor Ferrocement works great ... at least until it cracks. Then it turns to rustocement, sometimes with little sign that it's been compromised, and is prone to catastrophic failure. Nobody makes boats out of ferrocement anymore, and with good reason. They may be cheap to make, but they cost a lot more than fiberglass boats in the long run due to increased maintenance, more frequent repairs, and shorter lifespan. The same is true for roofs, only with the added costs incurred by weeks/months of building closure and the difficulties of working on preexisting construction.
Now, I'm not saying that ferrocement is terrible nor am I saying that these folks' PVC-cement is great. IMO, there are materials/methods for making thin-shell structures that are significantly more eco-friendly, durable, and lifetime cost-effective than either.
@@irrelevantfish1978 This is an old thread, but i'm making a structure of ferrocement with welded frame connected to a sacrificial anode, do you have any advice on making the concrete less prone to cracking? you seem very knowledgable. thanks in advance.
@@justingriffin2546 Sorry about the delay in reply.
Mostly, I'd advise that you look really, really hard at using FRP mesh instead of steel (eg, the stuff used in "fiber-reinforced cementitious matrix"/FRCM post-reinforcement). Contrary to popular belief, fiberglass is basically impervious to alkali once impregnated with resin, and I suspect even E-glass fiber (which concrete will eat in minutes if you just throw it in) would outlast galvanized steel after a bath in polyester or epoxy. The cracks will still happen, but it won't matter as much.
However, if you must minimize cracks, I can think of three basic approaches:
1) Reduce shrinkage. Typically, a substantial portion of concrete's tensile strain capacity is used to cope with the stresses produced during the curing process, so every microstrain of shrinkage avoided is a microstrain more the concrete can handle before cracking. While proper curing helps a lot, really big reductions will require admixtures, such as superplasticizer and CSA, as well.
2) Add short polymer fibers (ideally PVA) to add some ductility. I've read papers discussing synergy in concrete reinforced with both mesh and short fiber, and the results were impressive, but getting the mix to work right would probably be a bit of a nightmare and might not reduce micro-cracking. I don't recall seeing data either way.
3) Add a crystalline waterproofing agent to provide "self-healing" capacity for micro-cracks. It'll do squat against the kind of cracks developed by getting smacked, but it will delay damage due to wear and tear from thermal cycling and the like.
Hope something in there is helpful. Take with a grain of salt, as it's been a few years since I've done any research on this, so I'm out of the loop (not that construction technology changes very quickly) and operating on some very stale memory.
Too expensive!!!! Ferrocement its very cheap,since 50 years ago se feliz candela parabolics.
O yeah nice hey. Also Eladio Dieste but that’s a little different.
Eladio Dieste: Seagull. Impossible architecture.
What is the mesh?
LOL, there is nothing new here - this is exactly how they build ferrocement boats. It was popular in the 60s and 70s.
what is the name of the program the girl in the video working on
Rhinoceros. Guessing from the active window icon in the task bar.
Réalisé sans ordinateur dans les années 1930 ! Voir "hangars parapluie" sur moteurs de recherche ! Et à l'époque, pas d'ordinateur pour faire les calculs....
They have been doing this since the 1930s 😅
You guys complicate the things
I'll be the wet blanket.
This is really stupid. A waste if you ask me. Concrete is a cheap building material. Why not make it 4 inches thick. Add another 500 to the concrete budget and forget the million bucks in engineering.
Id be impressed with cheap innovative techniques that let people build their own house without a 30 year mortgage. Thats real empowerment. We dont need million dollar millimeter roofs.
Such a pointless waste of everything...they are proud of saving material cost WTF? the concrete itself is chapest material used here, even polymer fabric wasted during process is more expensive. next thing is labour, and all this 'precise computer analyses'. People are building much more complicated shapes using classic ferrocement technology since 70ties! Using PVC net makes it slightly lighter, but concrete thickness is the same. What is the sense??Just to show up?? There is no 'prestrained wire construction' here, wires are support only, removed later. Only elastic PVC net (not prestrained as you can see) stays in the concrete. Great example of pointless hi-tec misuse of technology. I wonder how they managed to convience anybody to pay for that childish playground. Most advanced technology here is...MARKETING!!! hahaha They know how to waste someone else money in Zurih! that's for sure!
150%
Yes. Average cost of concrete per cubic meter in my country is around about US$220. And until 10 years ago we barely had s concrete building in the country that wasn't a skyscraper.
I think they're referring to ecological and not economical costs, and in that sense, this method beats the pants of ferrocement if you assume that the prestrained wire formwork is reused. Compared to PVC, steel is more CO2-intensive to manufacture, has lower specific strength, is less ductile, and will have a shorter lifespan with higher maintenance requirements thanks to its vulnerability to corrosion.
Still, you're right that it's incredibly impractical, and I'm pretty sure there are cheaper ways to achieve similar or possibly even superior results, both in terms of performance and eco-friendliness. One method that occurs to me immediately is textile-reinforced concrete with either leave-in-place FRP mesh or inflatable fabric formwork. The material costs might be higher, but labor costs would be way, WAY lower.
You know the worst part? If they got a large cloth and some strategic rope, and sprayed it with cement/ concrete upside down and THEN turned it back over, it would be this. LOLLL Add fibreglass strands if one wants even more strength
@@Worldsbestname The ETH is a University, and this is a research focus project. There are most likely many technologies and processes being evaluated during the project. The project is not about the completed roof, but rather the process of getting there.
In other words, its a version of ferro cemment... which they really ought to acknowledge instead of pretending its ALL NEW creation on their part, which clearly its definitely NOT.. Just saying, its all very glammed up for a funding proposal.. sigh.. It so high tech that hippys can do it on the weekend, which is what I personally like about it, so its especially galling to see them doing the baffle em with bullshit high tech routine... Dont pretend its not accesable, thats the damn main point of ferro cement in the first damn p-lace.. SOrry but this BS pisses me off.. Cut the crap Swiss Engineer Using your cad on it doesnt make it your idea.....Karl..seriously.. We see you.
machines, labor, special cables and rigging. Too expensive. Product is a loser. Maybe good for off-world colony where bulky material transport is expensive. One of those man lifts weigh 15,000 lbs by themselves. So no way to put it up without expensive equipment.