The Aesthetic City is a channel about improving urbanism and urban design, examples of classical architecture and traditional architecture, cycling infrastructure, city trips and general city aesthetics. It is also the home for episodes of The Aesthetic City podcast.
Urban planning for cars and modernist architecture are the scourge of our cities. Polls show that most people prefer traditional buildings and even classical designs above modernist ones. Other research shows that pedestrian- and cyclist friendly cities lead to more happiness. Maybe it is time to change the way we design our cities and buildings - maybe it is time for the Aesthetic City.
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Whenever I build or fix something my very first thought is how am I going to stop this from breaking for the rest if my life lol
It's beautiful. I want to live there.
There's already solution to this problem. The use of Basalt (volcanic rock) rebars or synthetic rebars.
Well said.
Think about Dams we've built? My mother's nightmare from many years ago ?! We need to treat the concrete in Dams First Priority!!
God save the king!
You just have to use non-ferrous reinforcement so it doesn't rust easy
What about glass fibre reinforced concrete? That would last long if it can be created.
coat the rebar with Static Intercept polyurethane, and you eliminate rebar corrosion. OR, add dispersed platelet graphene into the cement mix.
We should stop using concrete entirely. It's ugly, causes tons of emissions and doesn't even last long. It's literally killing us in so many ways.
One of the solutions being discussed as a result of the Florida North Miami Surfside Condo collapse is the addition of polymer admixtures that make the concrete impermeable which prevents the oxygen aire and salt water from getting to the metal reinforcing. The problem as always is cost and Stainless steel rebar is not only too expensive but there simply is not enough raw material (Chromium) and other rare metals to add to the alloy to make it corrosion resistant ( stainless is a lie ) . It may be cheaper to "cover" the rebar essentially the same as epoxy or galvanized coating by making the concrete air tight and water proof than using super expensive alloys in the reinforcement. Further, there is great discussion about adding fiberflass fibers into the concrete to increase the tensile properties but the fibers cannot achieve the same strength as embedded rebar.
We have patented a binder which is entirely produced from recycled waste materials. It uses only 20% of the energy of Portland cement in its production and is 20% stronger than analogous mixes of Portland cement including UHPC. Additionally, it is more than 30% cheaper to produce than Portland cement. Interested?
Problem solved with plastic rebar.
and FYI, new Silica standard by OSHA when dilling/chipping/jackhammering concrete as the health effects include silicosis, very similar to working around asbestos.....
You still need rebar for seismic resistance whether you like it or not.Just use galvanized or stainless steel rebar with more space between concrete and bar, and that should do the trick for 100+ year buildings.
You can't really build skyscrapers with these old techniques, that's why we need to use reinforced concrete. You can't build bridges without using reinforced concrete, either. That's why the USA doesn't have as many old, beautiful buildings as Europe. You don't get beautiful cities like London, Paris, Rome, or Athens in the USA. Most of the USA's cities look the same, the most unique skyscrapers in places like New York City and Chicago tend to be from the early to mid 20th century. Still not as hideously ugly as the flats built in, ironically, greater London back in the 1960's and 1970's in the outer suburbs; quite the strong contrast between those buildings and the old, beautiful buildings for posh people and tourists you get in the posh parts of central London like the Victorian townhouses, Buckingham Palace, and Westminster Parliament. It really makes London the most simultaneously beautiful and ugly city in the world, sure there are some cities in Asia that have grandiose modern constructions contrasted with extreme slums but they can't match the beauty of old buildings like Buckingham, The Vatican, The Pantheon, The Acropolis, The Colosseum, or The Louvre. As far as houses go, you can make them out of bricks, stone, limestone, or marble, definitely, I didn't even realise they made houses out of reinforced concrete. My house is made out of bricks with a slanted roof with roof tiles, which I thought was normal, and they still build buildings out of bricks here, the block of flats they recently built next to my house is made out of bricks and is only 4 storeys high. Do you Americans really build your houses out of reinforced concrete? The buildings I saw when I visited Florida didn't look like they were made out of reinforced concrete, they looked too flimsy to be made out of reinforced concrete they looked like they were made out of plastic I had no idea how they were supposed to be able to withstand the hurricanes that they get in Florida...
The concept of planned obsolescence is deeply rooted in all aspects of the Western Capitalism. And this affects ALL things, construction of buildings above ALL! The greed and the pursue of low costs and cheaper material and achieve higher profits WAS AND IS THE WAY, WAS THE LAW. NOBODY wants to PAY the extra cost to use better material or methods of construction AND capitalists, entrepreneurs and POLITICIANS responsible to the demands and TO PAY for the construction of this things will NOT CHANGE by conscience. THEY, in general, are very satisfy by a 50 to 80 years of lifespan of these reinforce concrete buildings... The GOOD EFFECT of the building UTILITY will cover ALL THEIR PERSONAL CARRIERS financial, commercial or POLITICAL... SO AFTER they DIED there is no concern FOR THEM that someone (who even REMEMBERS who build it) eventually be killed by a collapsing concrete building... This is a MATTER to future generations when the concrete time bomb ticking finally explode multiple times... Until there, ALL personal profiting it will do what ever they can to stay things running the same way of the last CENTURY... BECAUSE WE ARE ALL HUMANS, GENERALLY LAZY AND GREED ORIENTED...
I think seismic loadings and current building codes will prevent using limestone as a future material.
Instead of rebar perhaps another material that doesn't oxidize could be used. Bamboo,wood laminates or a recycled plastic could be used. Desert sand could be fused into irregular shapes. Epoxy coating the rebar seems to make it worse. If the concrete could be modified to be less dry and solid and more like a gel it could flex and wiggle like jello. Something is wrong when the things made long ago are still standing and the things we make today can't outlive the builders.
1. There is no "we". You fix your house. I'll fix mine. 2. You won't get a permission to build a house ( anywhere close to a large western city ) that has a lifetime of 500 years unless it has a cultural significance or is a military defense. You can always lie about the material and then we are back to point 1.
The word 'oxidate; does not exist. OXIDISE
With all of our technology, somehow we have forgotten more than we have learned and discovered.
I think our cities are doomed. Because of profit margins and speed, we will not get rid of reinforced concrete as our major building tool. We are animals of habit and changing any habit. ESPECIALLY based around economy is slow if even possible to redirect.
Why not put stainless steel in the concrete instead of the steel rebar?
What if they use stainless steel for reinforcement? Or perhaps even galvanized reinforcement rods? I once talked to a very old concrete layer, and he said that in the "old days," they didn't "pour" concrete, but instead used a rather dry mixture of sand, aggregate, and Portland cement that had just enough water added to achieve the consistency of wet beach sand. It was mixed by hand, and then the mixture would be spread around, and then pounded with paddles till it was compacted. Without so much water in the mixture, it yielded a much denser, less porous concrete. We have driveways in my neighborhood that date to 1890 which were made this way, without any steel reinforcement, and after almost 140 years, they are still in perfect condition.
Carbon fiber rebar. Problem solved.
if the rebar was black oxide coated before use, it would be perfectly stable, pretty much forever.
Concrete buildings have a average life span of about 300 to 500 years. (average doesn't say anything beside it is always longer than 300 years) The concrete is only filling, what keeps the building up right are the metal beams within the concrete. Even if you take all the concrete away the building will still remain upright from its metal skeleton alone.
A number of startups are experimenting with recreating Roman Concrete, which solves the problem of water seeping into cracks and slowly eroding the structure.
Except from the gonzo style, a very nice video.
I heard, that this old concrete was on repipce od burnt lime, which has sefl healing properties. When crack occurs, lime is dissolving in water and then it's settles in holes, stopping the water flow
Just use hempcrete
He is nothing but a massive hypocrite. Pretends to love nature, then goes out with a shotgun to blow its head off! utter c..t of a human
Cayala city in Guatemala says it all ! Have a look , I think you will love it . I do !
I agree 100%. For years I could not quite articulate why I disliked so many brutalist ultra modern buildings . Now I know that a great many other people share my misgivings about the loss of classical style buildings . Great news to hear about the retro re-awakening!
Fiber glass reinforced concrete is also a good solution
Can I get a source on that building that looks like it was converted from a part of a Roman-era arena?
just as in Roman empire, some buildings are built to last a long time
wont happen concrete is cheaper and faster than bricks so it all comes down to profit as i always does with us
if the rebar is at the correct depth in the mix it will last longer i have observed many a repair and the rebar has only been 4 or 5 cm deep
bricks look much nicer and last much longer
Sika, fosroc, cathodic protection, forced current, grp plates/wrap, grp rebar. There's a whole industry of solutions to keep these things going or design them to last longer and longer. Concrete is here to stay.
We need some CONCRETE solutions for this problem.
Excellent!
It's not just sand where there's a problem. Gravel is either mined in pit mines or just collected from mountains. This is a big problem in Los Angeles. Over here they are deleting mountains because it's cheaper to transport locally.
Great info . Five cats in your home can corrode the structure within 5 years. The salt in their wasteproducts will eat through everything.
Even if Brutalism wasn't intended to denote brutality, that is the de facto outcome, in my opinion. The architecture of the last century is a visual representation of flawed ideology imposed on a massive scale. It has degraded culture and social psychology. It's remarkable to discover how much this is quite literally caused by materialism in terms of substance as much as philosophy. Once again, the physical structure of buildings is indicative of the defective social structures that have imposed so much suffering.
If it sticks t to the modernists thats a plus too.
Why are we so addicted to low quality steel used as re-bar for reinforcement for concrete. Maybe we could recycle plastic to become high strength and solve two problems at once. The plastic could take the place of re-bar.