Geopolymer - A concrete foundation for a sustainable future | Roisin Hyde | TEDxFulbrightDublin
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- Опубликовано: 26 ноя 2018
- Concrete is the second most commonly used material on our planet after water, and also the second biggest producer of CO2 emissions. This year alone over 3.2 billion tons of CO2 will be released into our planet’s atmosphere, equivalent to the emissions from every car in Europe, America and China. For over 3,000 years we have been producing concrete by the same primitive method of the heating and grinding of limestone. Humanity is now on the brink of a Fourth Industrial Revolution, where technological advances are providing Architects, Engineers and Material Scientists with the tools to produce the next generation of high-performance, low-impact materials. Materials such as geopolymer concrete, a low-carbon, zero-waste, circular economy model to protect finite natural resources, reduce CO2 emissions and control climate change.
Roisin Hyde is a Fulbright award-winning Architect and Doctoral Research Student at Queen’s University Belfast in the area of Novel Materials, Architecture and Design (NoMAD). She received her Bachelor of Architecture from University College Dublin, became a Chartered Member of the Royal Institute of the Architects of Ireland and practiced for over 15 years in the areas of Sustainable Design and Conservation Architecture.
Her current research focuses on the development of a prototype, cement-free, geopolymer concrete façade panel through the use of innovative automated technologies including Materials Characterization, 3D Laser Scanning, Point Cloud Modelling and 3D Printing. As a Fulbright Visiting Researcher she will travel to the University of North Carolina Charlotte to produce a high-performance, geopolymer concrete façade panel with a self-cleaning, hydrophobic, hybrid nanomaterial surface, using alkali-activated industrial by-product and waste materials. Ms Roisin Hyde is an Architect and Doctoral Research Student at QUB School of Natural & Built Environment. She received her Bachelor of Architecture from UCD, became a Chartered Member of the RIAI and practiced for over 15 years in the areas of Conservation Architecture and Sustainable Design. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at www.ted.com/tedx
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Hello Mam!
I am a civil engineering student of INDIA. After listening your talk, I also wish to bring Geopolymer concrete in our nations Construction Industry :)
Not only India whole world should move towards geopolymer concrete
shout outs to Joseph Davidovits!
Why not mention Davidovits work??
A small correction on your timeline I have North American geopolymer ceramics that are a minimum of 13,000 years old, and it is incredible strong material. If you would like some samples contact me !
Congrats Roisin Hyde - well spoken!
Hi eng.Roisin I am an architect and research on the green concrete and geo polymeric concrete would you please help me scientific resources about this? THanks for your session .it is really useful.
This will all work together very well, with Australian rubberized concrete and frp bars
Assuming the feed stocks for geopolymer concrete are as readily available in similar proximity to a job site as OPC, what is the expected cost over/under of using geopolymer verse Portland cement?
You are right, I have more studies for geopolymers, so we can use it for removal dyes in wastewater, and it's have a mangnific results
How can I contact you, Tired of using OPC in my country victim of oligopolistic cement industry
We manifest everything
This is extremely interesting and fascinating the minecraft build was very good I think everyone who thinks it is ok to use concrete that is bad for the environment should watch this I also thought it was quite incredible how much Carbon dioxide emissions were made from all that concrete in this year alone!!!
I agree with the concept but, the speach stops short on how ....?
An extremely interesting topic, makes you think. I don't work with cement and use lime putty to make my mortars and plasters. Lime uses less energy to produce than cement with a lower carbon footprint, it even absorbs carbon dioxide.
Having said all that..........Graphene, carbon nano-tubes and geopolymer are the way forward.
Very good.
Geopolymer will be the future alternative for building construction.
I have done a project by using geopolymer. I have got very good result on it .
Can you enlighten me more about the project you did?
This is really fascinating, I guess the possible future of concrete industry. However, my only query is that if we are completely eliminating the cement then how to impart the binding property in Geopolymer Concrete?
Thanks for taking the time to watch my Talk Ankit. Geopolymer is actually a binder, similar to Ordinary Porland Cement(OPC). It is created by the alkali activation of reactive almino-silicate material which can be found in a wide range of industrial by-products including Fly Ash, Slag & MIne Tailings as well as naturally occuring Clays. This process results in a fraction of the CO2 produced in the manufacture of OPC, where CO2 is emitted directly from the limestone used to produce OPC as well as indirectly by the fossil fuels used to produce this heat. This Geopolymer binder is also stronger and more chemically resistant than an OPC binder, due to its unique molecular nanostructure, which means you can improve the performance of the concrete while also reducing CO2 emissions ie. high-performance, low-impact.
@@roisinh4366 Thanku so much Mam for such a quick response. Honestly, i didn't expect a reply form such a great researcher. Thanks for tackling my query. In fact, after watching your video i finally decided to work on this topic all along. I did my master's couple of years back on High Strength Slurry Infiltrated fiberous concrete and now was looking for something to work upon. Thanks to you for sharing such a unique possibility to work upon.
@@roisinh4366 I wish, i could read more about your research in depth. :)
@@roisinh4366 There are many exciting new construction materials coming out but the hard part is getting certification approvals incorporated into Global Standards whether its DIN , JIS , ASTM ,Australian standards etc , the testing process can be extremely expensive , and these materials cant be used to build homes until they have those approvals.
Hopefully under GHS Global Harmonised Standards they will get direct adoption into the Building Codes in most countries on earth.
I love the concept of not just recycling waste , but using waste with a better environmental footprint , My apologies to the 20 million Italian concrete workers around the world :)
Will your proposed geopolymer still require rebar type reinforcing?
Fibre reinforced Plastics are around the corner for talking this situation
Where will I get sample of geopolymers to be added to GGBS to produce concrete.
Hi Vaman, thanks for taking the time to watch my Talk. Geopolymer, a cement-free, low carbon binder, is produced through the alkali activation of materials which contain reactive aluminates and silicates such as Ground Granulated Blastfurnace Slag (GGBS) and Fly Ash. To 'activate' these ingredients you must add a solution which typically consists of a mix of Sodium Hydroxide and Sodium Silicate. The concentration and volume of the solution depends on the type of Slag or Fly Ash you are using.
Portland is a binder
It is not the only binder
Saying geopolymer based concrete is “ cement free” shows a lack of understanding
Think of the “ cement” as a binder
Portland cement free is a correct statement. Cement free is incorrect
I’ve been using and promoting the use of appropriate binders for 30 years
Before that I used only Portland cement as I thought that was the only way to make concrete
There are many viable binders. Portland is one, geopolymer are one, ceramic cements ( ambient reacting ceramics ) are another group
They all have their place
@@teslastones without subtracting the environmental cost benefits of using less or no portland cement , what is the pure dollar cost saving with AR ceramics over portland ?
Geopolymer is a little more expensive per kg than portland cement ?
Mark Yes the price of geopolymer Binder based concrete varies-- just as does the cost of portland cement based concrete.
In formal studies conducted by me in Singapore, several regions in the USA, Mongolia, Malawi the cost is about the same
can you give me your contact miss Roisin Hyde?, now am a student take civil engineering so i need to know more about your presentation. well spoken.
geopolymer was used more than 9000 years ago in INDIA for building many hindhu temples
Do you have a source for that claim? Wikipedia cites a document, but I read it and it does not claim anything like that. I cannot find any other source.
She needed to focus more of why geopolymers are better performance than Portland cement. There are amazing applications that could never be possible without geopolymers but she just keeps talking about Portland cement.
Yes, it would have been interesting to hear more about what geopolymers are
This is old forgotten knowledge calling it new
interesting, but nothing about method, samples of the product, costs associated and any restrictions like super expensive plants.
I think you're a few thousand years behind
But it's not low impact. You can't discount the carbon footprint and resources used in the creation of the waste materials you're using just because you're repurposing something they were otherwise going to throw out. It took a lot of energy and resources to create that stuff that has to be added to the final product. Can't cheat and leave out the cost of that production.
so 4 yrs later n still nothing happening...
Pyramids of Giza
She said one big empty void...
2/3-rd of the video passed, yet we still havent heard about the subject!
Obvious, general bullshittery filled the time so far.
Only one question remained: Whats the deal wit "T" at the end of a word?
Concrete can be recycled...
An don't make out like it's us polluting
It's you guys
lost me at flexable
Great stuff, really gotta work on your presenting tho.. so intensely boring
"As a family, my son and I".
Does this child have a father?
OK I came here to learn something about Geopolymer concrete. What i just did, was waste my time watching a women painfully give a speech about a topic that she only got through the first 2 pages of its cliff notes.
This was a vague sales pitch.
Who cares what their building with in "minecraft" i had double take, i couldn't believe she brought up a video game. Than in the end another reference, this time to a movie.
I came here for information, leaving with my head in hand, and disappointed in Ted..
OH, and also I have not increased my knowledge of geopolymer concrete.
How much CO2 volcanos make?
More than all our human history, so this CO2 propaganda is childish and "phoney" and may I add the oceans are the ones who make the great majority of oxygen.
I like geopolimers but you are pushing the wrong strings to get us to use it.
Since you ask - according to the U.S. Geological Survey (USGS), the world's volcanoes, both on land and undersea, generate about 200 million tons of carbon dioxide (CO2) annually compared to the 3,200 million tons emitted from the production of Concrete.
If you had actually listened to the Talk, you might have learned that this Geopolymer material has many other advantages over conventional concrete in addition to the potential for reducing these CO2 emissions by up to 90%. It is made with 96% industrial by-product and waste materials, thus protecting finite natural resources and is also stronger and more fire-resistant.
So I think perhaps your perception of this Talk as 'childish, phoney CO2 propaganda' may have more to do with your buttons than my strings!
@@roisinh4366
Like I said in the end of my text that you did not see(click), I like Geopolimer you don't need to sell me on it you need to sell it to the million and billionaires but you are pressing the wrong button because those people know about the CO2 hoax.
Now it's not about the emission it's about a global tax that is going to kill millions in the 3rd world countries, it's not about the emissions it's about the tax. Money and greed behind the green mask.
Vulcanos have been spewing CO2 forever obviously it's not bee adding up to be making global warming or we would not be here. Ha yes they changed the title because it was getting ridiculous now its called climate change. Newsflash: it always changed! There is also something you might have heard of called seasons and a slower one called precession not to mention solar cycles specially because the Sun is the main driver of the climate.
My buttons get pressed when I see a global tax on breathing and somone hammering the CO2 fear on the public.
Why don't you go see the rest of the numbers while you're at it?
For example you will see that GDP and CO2 are going in opposite directions. Puff there goes the CO2 argument.
The point is (if you did not get it yet) that the "CO2 problem" is nothing but a hoax to make a global tax and it's really disingenuous of you to make CO2 the big selling point, top people know it's a hoax and your missing your target audience(the people that would actually afford to be in the construction business)
Let's just do some basic math.
We make less that 1% of the CO2 in the atmosphere By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide
You really think 1% off a volume of 0.04% of the tottal of volume of air (0.0004) makes any difference???
Obviously there is no consistency in the gas to trap heat it simply radiates to space and absorbed in the ocean gosh water vapor clounds then trap heat... (admittedly so... and so what?)
And...
The oceans are by far the largest carbon sink in the world. Some 93 percent of carbon dioxide.
So 93% of 0.0004 is
0.00037200000000000004 - 0.0004 so remains just (minus) -0.000028 (negative thus not accumulating)
Let's do some abstract thinking...
Let's visualise it in a 1m ruller, 4mm being the Co2 divide those by a circle then a sphear... yea we can see it's childish to think CO2 is a problem.
There was hacked emails that showed that climate data was being altered to fit the CO2 global agenda. I rest my case.
Exxon gives million-dollar backing to carbon tax push...
I think its safe to say CO2 is not a problem.
No one speaks abou lead poison for example that they made people use on their cars they knew the effects, or flouride in water and tooth paste, aluminium in vaccines, you really think those people are really interested in our well being or the planet?
The problem with the termite argument is that the CO2 emitted by termites is part of the "circulating supply" of CO2 which was captured by trees from the atmosphere only to be released back into the atmosphere. Fossil fuels however are not part of the "circulating supply", so the addition of those to the atmosphere adds to destabilizing the system.
HempCrete interested in GeoPolymer binders here at Slovakia