It doesn't matter that there's not enough waste to replace all of the concrete use in the world. We just need to replace enough to make an environmental difference. If we use up all of the waste products available to make this stuff, we will not only drastically reduce concrete, we will have cleaned up all of those other messes! What's not to love?

@andreyates1620

2 жыл бұрын

Yes, I totally agree with you here.

@glennmitchell9107

2 жыл бұрын

It all depends on the cost of each alternative. Every decision is a trade-off.

@standingbear998

Жыл бұрын

it won't make a difference. missleading

@michaspringphul

Жыл бұрын

What is the benefit of using hazardous materials for building living compartments? I don`t get that. The same goes for these plastic tiles which are produced in India. They are horrible for the environment, animals and for humans. We already have big issues with microplastics in the air, water and soil. Using a mixed plastic (because the melt different kinds of plastics together) for walking or street plaster, makes it even worse. The abraision will pollute the envirnoment much more than just burning the plastic using filteration for energy production. I don`t get the ignorance on human pollution and why we always make things worse, when we try to fix things we produced in the first palce

@DoloresJNurss

Жыл бұрын

@@michaspringphul The idea, I think, is to sequester the waste. It's there already, so better it be sealed into a form that it can't escape. As for plastic tiles, they probably should only be used for low-abrasion surfaces, not floors. I can think of many possibilities there. You have a valid point on how we always make things worse. I think it's because of the conquest mentality. We mess up by conquering something, and then we try to solve it by conquering the problem, and that makes still more problems. We have to learn how to think cooperatively, find a use for everything the way nature does, fit everything into its ideal place and not try to impose what works in one situation on some different situation (like using plastic tiles for flooring.) The waste isn't going to vanish--we have to figure out what to do with it.

Would you consider doing a video on cost/benefits of historical preservation versus tear-down/new building construction? At what point is a building too far gone, or it’s purpose too inefficient to preserve? What are other ways of preserving buildings while also accommodating contemporary community needs? I remember a sky scraper on Sansome Street in San Francisco that preserved pieces of the street-level facade, while replacing the entire original building with a new skyscraper. Love your videos!

@Redrally

2 жыл бұрын

That would be a great topic to talk about.

@DryBonz1

Жыл бұрын

I would suspect that there are too many factors to come to a generalized conclusion comparing the two. How degraded is the plumbing system; how outdated is the electrical configuration; what type of foundation does the building have and what condition is that in; how efficient is the insulation of the building; is the building still structurally sound; what zoning regulations have changed since the building was first constructed; what is the intended use of a replacement building. The list goes on, and any one of those variables on its own could make or break a decision to retrofit vs rebuild.

@tZydeco

Жыл бұрын

@@DryBonz1 - there are also differences in "feel". Somethings about an older structures with their old growth wood, lime plaster, milk paint and Tung oil as opposed to laminates, partical board, synthetic stone, polyurethane and latex paint.

@DavidMDensford

Жыл бұрын

San Antonio tried to rebuild/replace 70 year-old dilapidated, crime-infested, low-rent neighborhoods. Police departments in nice neighborhoods fought the projects because they didn't want the displaced crime and drugs pushed into their areas.

Great presentation. I have worked on Fly ash based geopolymers and found interesting results. Every advantage you discussed is observed in the geopolymer. Now I am working on waste glass geopolymer, where we don't need Sodium silicate and also a low concentration of NaOH is required. Once standards and rules are established, I think geopolymers will be the future of building materials

@BelindaCarr

2 жыл бұрын

Fascinating! Do you share your results on YT or another platform?

@HopefullyUnoptimistic

2 жыл бұрын

I sense a collaboration/promotional opportunity. Perhaps it's worth asking your bosses about promoting their research through well informed creators?

@maslowpavlov

Жыл бұрын

does super smooth texture of glass cause issues? Does glass need to be tumbled or blasted it be used in mixes?

@elzbietagarus7078

6 ай бұрын

can I ask for contact ?

There are almost no more available Fly ash or slag (GBFS) in the European market, as it is already in use in cement and concrete. In many ways we already have a semi-geopolymer concrete in the market. For instance, in the Norwegian market the standard cement has 20 % fly ash, and another has 70 % slag. Yes, Geopolymerconcrete will be more common, at least in some more specific applications, but it is still much more important to reduce environmental footprint from the ordinary portland cement production.

@notrickytoyota

Жыл бұрын

Like bruh, în my area used to be a huge land fill of fly ash, not any more it îs all concrete and cinder Blocks now.

@man_at_the_end_of_time

Жыл бұрын

Maybe ground up wind turbine vanes?

@gustavchambert7072

10 ай бұрын

Not to mention that all that fly-ash is a by-product of carbon-intensive and unsustainable processes in any case.

@mefobills279

5 ай бұрын

The fly ash isn't relevant. It is the polymer bond. Geopolymer is typically a OH hydroxide bond. Portland cement is a calcium bond. Two very different materials.

@kickinghorse2405

Ай бұрын

There's an organization in Alaska experimenting with silt and mine tailings (instead of fly ash). Pretty cool 😎

Greatly explained :), And also the scanty supply of source materials for Geopolymer concrete synthesis you talked about is a major Impediment to its large scale applications... Thats exactly what we addressed in our research here at National University of Sciences and Technology, Pakistan, We replaced fly ash with newer source materials i.e. agricultural waste ashes (they are also rich in alumina and silica and thus conducive to Geopolymer synthesis) We found that strength remained intact for upto 15-20% replacement level

@BelindaCarr

2 жыл бұрын

Very cool! Thanks for sharing, Mohammad.

@ravenousvisages

Жыл бұрын

Any thoughts on replacing steel rebar with lighter basalt rebar? With the reduction in weight, walls can be thinner, further reducing the amount of cement in a structure. Also, basalt would never rust.

@muhammadumer6141

Жыл бұрын

@@ravenousvisages sounds like a great idea

@maheendaud7615

Жыл бұрын

I am going to start my masters thesis on geopolymer concrete. If they have made this material and has also been applied in the world, what do we need to research about?

@muhammadumer6141

Жыл бұрын

@@maheendaud7615 well there's plenty of things yet to discover, like you can use some newer source materials instead of fly ash for example rock based geopolymers are very interesting Also you can explore synthesis of chemical activators from waste materials for example sodium silicate can be derived from biomass waste and used as an activator, So if you read the latest papers you will find the current research trends and a ressearch gap for your thesis as well

Interesting presenation Belinda! What is the cost of geopolymer concrete compared to conventional concrete?

Hey Belinda, Your videos are really informative. Yes Geopolymers are really versatile material. I am an architect doing research in the subject. I've been to the Geopolymer Institute in France to attend GP camp in 2018 and had interacted with Prof. Daviodovits. The potential in India is immense as we still have coal power plants, but I think suitable thermally activated Aluminous and Silicious materials can be found anywhere in the world. Some of my friends who attended the camp in 2018 are experimenting with bottom ash of incerinators. Portland cement has been, over the centuries, standardized. GPC is still very new in that respect. But I am sure that standardization will happen. I recently came across a paper from Arizona University which explored the total replacement of virgin aggregates in GPC. The developments happening all over the world in this field is really exciting. I think you should do a video on other uses of GP like LTGS for making stabilized soil blocks and high strength ceramics using GP - both lesser explored possibilities, especially the ceramics.

I really appreciate your time and effort to objectively talk about the pros and cons of various building materials. Very informative. Thank you.

You provide such great material to your viewers. I appreciate all the hard work you put into it. It's a truly wonderful channel!

Your voice over work is EXCELLENT!

Excellent presentation! I always learn so much from watching Belinda Carr's videos. I think the Canadian company Plaex is using this type of product in their composite block system.

excellent presentation Belinda......very informative ...well done young lady!!! bravo!

I find the subjets and the manner in which you present them to be very interesting and pleasant to watch. All the best to you and thank you. Dave & The Girls

@BelindaCarr

2 жыл бұрын

Thanks a lot, Dave (& the girls)!

I work at a steel plant. The slag is heavy. So much so that we smoked a cement truck trying to use it to make some of this stuff. We had a hose spraying the radiator to try to keep it cool. Not an insurmountable problem just need more powerful better cooled equipment.

@jordanwanberg753

Жыл бұрын

Or you have to make and transport less of it at a time which means it is going to be more expensive. Unless people need specific properties they don't want to pay more.

Ive subscribed to your channel because of the fine amazing construction information that is provided. Thank you Belinda

I just saw you featured on Vox channel, so proud your channel now hits 200k subs! On your way to a million soon. Go strong girl!

Great feature as always Belinda... thanks for this!

@BelindaCarr

2 жыл бұрын

Thanks, Stephen!

Thank you so much for the expertly crafted content! You're brilliant at conveying complex topics and I appreciate above all your commitment to earth-conscious engineering.

@yesbrth

Жыл бұрын

Exactly. Except the "carbon emissions" hoax that some billionaires sold as true to the general population (to collect carbon taxes).

really enjoy this educational video, this sounds like a no-brainer for a lot of different applications, if not all.

You have an amazing channel! Keep up the good work! And yes the Pyramids are always interesting.

Love what you Belinda. Don't stop. I only see quality on your channel.

@BelindaCarr

2 жыл бұрын

Thank you very much!

You're thumbnail intrigued me enough to not just scroll by. Then i realized it was you. Been loving the videos. Hello from Long Island NY 👋🏼

@BelindaCarr

2 жыл бұрын

Thank you! I considered make another silly thumbnail pointing to the geopolymer print, but decided against it. I really don't know what the magic formula for a thumbnail and title on YT is.

Hey Belinda, I just stumbled across your channel and this is very informative. I would love a video on the egyptian geopolymer pyramids theory please :).

Awesome video and commentary 👌

Really great video. Had never heard of geopolymer cement before. Sounds like a really enticing material.

Very nice video and analysis. Must focus topic for the future. Greetings, sustainable solutions engineer

As someone who had permanent eye damage from sodium hydroxide burns, yeah, the liquid component of geopolymers is nasty stuff. That the activator is a corrosive liquid that requires separate packaging is a logistical hassle, too. Caveats aside it's a useful engineering material that can be applied in certain niches. As a spray-on foam fire barrier it's hard to beat, and combined with construction methods like monolithic domes and non-metallic tensile reinforcement like basalt rebar, can make long-life low maintenance structures. A monolithic-geopolymer-basalt dome could probably last longer than the Pantheon.

@thomasstebner7579

Жыл бұрын

Is there anybody building yet with thin skin eggshell spray applied multiple layer building technique?

@r0cketplumber

Жыл бұрын

@@thomasstebner7579 Search terms like "monolithic dome", "basalt fiber", and "aircrete" will return a lot of interesting links.

@thomasstebner7579

Жыл бұрын

Ty

Thanks Belinda. Another amazing video!

Super cool! Thanks for the info

Brilliant, thanks, I knew nothing about this and that's pretty rare when I've never heard of something

Enjoyed your presentation, thank you very much.

Belinda, I truly enjoy and appreciate your videos. You have a very good grasp on the viability of different construction methods. Do you have any information on the availability of these products in the DFW Metro-plex? Thank you and keep up the good work.

Great video, very informative!

Thanks for the insight on this information

Great video, All the doubts cleared also explained the advantages and disadvantages of geopolymer. Love from @India

simply great, thanks for this info 👍

You're a really good teacher, thanks!

Excellent quality content. Thanks!

What a great job on this presentation!

@BelindaCarr

2 жыл бұрын

Thanks, Peter!

I would love to hear more about the geopolymer theory of pyramid production - it sounds really cool!

Very useful content thanks.

I firmly believe it's not the materials, it's how we've chosen to use them and our lack of adaptability or willingness to change. Your videos are fascinating and I always learn something. Thank you. :)

YES ! Egypt pyramids for sure , a worthy subject and an interesting one too ! ---- a big THANK YOU for all your quality work , KEEP SHINING , KEEP SMILING & KEEP SHARING THE KNOWLEDGE --- from Canada J.

Thanks again, Belinda! ❤

A very good video. They definitely could have their own use, particularly after the greenhouse gas reduction targets.

Great presentation. I have worked with Geopolymers and I know that material have many advantage versus Portland Cement, I think geopolymers will be the future of building materials

Great Post !

Hi, geopolymer fan here. I would like to add that one of the most common raw material for geopolymer is ferro-kaolin (an aluminosilicate source). They could be used to make ferro-sialate geopolymer. They basically exist everywhere. It's not the aluminosilicate that is rare, but the alkali metal that is crucial for the chemical reaction. There's only so much salt in the world and producing sodium hydroxide in the scale required to make geopolymer as common as ordinary Portland cement is just too expensive. But researches have shown calcium in ggbs form can substitute some of the sodium/potassium in the reaction, and 1 atom of calcium can replace 2 of them. So it IS possible for geopolymer to replace Portland cement. And sodium hydroxide is rarely used directly on site if you are talking about commercial products. Any geopolymer mix designer that is aware of the danger of NaOH should have design safe and ready to use solution of sodium silicate or potassium silicate

@muhammadumer6141

Жыл бұрын

Great explanation Nedi, also laterites are a very good source for ferro sialate geopolymers

I suspect a more significant barrier to replacing Portland cement than manufacturers is that architects and engineers want to work with proven materials.

Verry good information. thanks

This is so cool! Thanks for explaining things in a way that a layman like me can understand

@BelindaCarr

2 жыл бұрын

Thanks for watching!

Great work!

There is no question that humanity will have to manage their resources better if we expect to remain on this planet. What a nice summary and introduction in the pros and cons of geopolymer's. Last year I discovered Polymeric paver sand and just loved what you can do with it. By framing my paver patter, adding colored stone, brushing the sand between the gaps, sweeping off the surface and adding water, can create some artistic designs, such as walkways, that are not only lovely to look at but are waterproof and will last for years. Thank you Ms. Carr for your presentation and insights in this emerging technology. Nice job!

Great video!! so much to think about... id love a video on your thoughts on the pyramids

@BelindaCarr

2 жыл бұрын

Thanks! I'll put that video on my list.

Great job explaining

Awesome work

Excellent video. Up here in Canada, our team is working on developing a locally sourced geopolymer cement formula for use in 3D printed concrete houses!

@corail53

Жыл бұрын

How do you guys ensure that proper adhesion happens on stacked layers especially with no rebar. No offense as I don't know your company, but a lot of companies in the game seem like their teams have 0 experience in the construction world and are trying to solve problems that don't exist.

I have done my research in MUET, Jamshoro Pakistan on geopolymer concrete by using local NaOH as alkali activator instead of using laboratory grade NaOH since it is very costly and less market supply as you discussed in this video. The results i got from this research were seem very good as compared to conventional concrete.

Awesome Video!

Definitely sounds like it would be best used in the applications it most excels in, to the extent that the relevant waste streams can support, rather than as a general purpose concrete. Perhaps some of the businesses already in the industries that manage those waste streams could be given tax incentives to make partnering with the businesses that utilize those byproducts more lucrative and cost effective than just letting it sit there. Sometimes it just takes a little grease to get the wheels spinning in a new industry, especially when it encroaches a bit on the territory of an old industry. Great topic, editing, and presentation - really like your shirt, too!

Great presentation,I would like to hear about Quantum Mechanics next 😊

Facinating Belinda! GP concrete seems a no brainer and you should continue to probe this subject 👍 xo 🥳

Very awesome video. More on geopolymer concrete please

Thanks, I enjoyed the video.

Recently there is also Ferrock a mix of Steel Slag & Crushed Glass powder what I like about ferrock is it doesn't look like gray concrete it comes out many shades of iron reds and also sometimes layers turn out to be black

Thanks for the heads-up! 🙏🏽 💪 Maybe Geopolymer cement can also make infrastructure (e.g. bridges and skate parks) more affordable.

@fillhixx

2 жыл бұрын

Strange that bridges and skate parks are your touch points….

@S1L3NTIGamer

2 жыл бұрын

I was not anticipating seeing one of the OG’s of Internet history on this niche of a video but I’m not against it.

@microcolonel

Жыл бұрын

Probably not cheaper, unless energy is artificially expensive.

@Invasionisti

Жыл бұрын

For bridges geopolymers are bad choice where ever winters are below freezing temperatures. The geopolymers I have tested at work do dot endure freeze cycles when there are any salt present.

@corail53

Жыл бұрын

These are not good for infrastructure.

When adding waste materials to concrete mix, is there any concern about volatile chemical off gassing that would endanger inhabitants? And how much of these specific waste materials do we actually produce in the associated industries? How much concrete could we make with our existing production, as compared to avail cement?

@brettelmerelmer3061

Жыл бұрын

With fly ash and slag, both are created at high enough temperatures that any volatile compounds that may have existed in the raw materials are completely burned off.

Thank you for sparing us from the surprisingly complex chemical details and using a quick summary instead. I’m particularly interested in the fire resistance and insulating qualities of the air containing formulations. We really need non-flammable alternatives to traditional construction materials like wood and pvc lumber. Fire danger is increasing ever year and it’s become a surburban issue, not just a wildland-urban interface problem. Blowing embers can go anywhere.

great video ! plz do the pyramid one 🙏 sounds extremely interesting ! 😀

Excellent summary. Was going toask what ACI would think of this development; would they be inclined to adopt these as standards even if supplemental

Great info,

The long term durability of roman concrete apparently involves the use of volcanic ash which reacts with salt water creating a harder material. The fact that this sort of chemistry isn't used to reinforce the concrete that we use is kind of silly. Granted volcanic ash is hard to come by unless you're near a former volcano, the fact that simple and basic chemistry isn't used more often is interesting. Simply because we'll do stuff like taking steel rebar and dipping it in plastic in attempt to prevent galvanic corrosion, but ultimately end up exacerbating the issue even further by focusing all the corrosion in specific points.

@jimurrata6785

2 жыл бұрын

Epoxy rebar is a non starter. That stuff is dreadful by trapping moisture against the steel. Phosphate solutions are gaining a lot of traction for bridges and highways.

Great talk. Agree it should be used more.

Absolutely fascinating, truly the future of construction. Thank you for sharing and all of your hard work. PEACE and God bless.

Fly Ash is usually used in northern climates instead of salt during the winter. Fly Ash was used in IL. in the 1970' & 1980's. Using Portland cement & aggregate ( sand & rock) can be poured in all the types of weather. I have poured concrete in the middle of winter in northern IL with no adverse effects. Concrete is a better way to pour highways, bridges, & over passes than asphalt.

Thank you for vid, i used to follow Davidikus always wondered how the limestone blocks they made a few years ago in paris are doing. Could be another part of your Egyptian themed video. Take care

This video really cemented the point

@BelindaCarr

2 жыл бұрын

Lol!

One of the interesting ideas Bucky Fuller came up with was prestressed concrete for highways. Bolted together on substrate. It provided better performance and easier repair/replacement. I’m wondering how geopolymers would work in this environment?

I wouldn't worry much about sodium hydroxide. Portland cement is plenty caustic as it is. While using SH to dissolve silica into sodium silicate happens at very high pH, the product is not. I definitely understand that as we (hopefully) move away from coal/palm oil and toward more sustainable renewables the raw materials for geopolymer will also decline. I'm not an engineer, so I never factor concrete for tensile strength. I'd be interested to know just how different geopolymer is in this regard. Fly ash is nasty stuff, but I can see it being used for applications you mentioned like sea walls and road beds. Thanks for bringing up the topic. 🙂

@nedisawegoyogya

Жыл бұрын

Any geopolymer seller would most likely already mix the SH with silica to the Best ratio that is not caustic. SiO2:Na2O ratio above 1.5 should not be caustic, from Wikipedia.

Thank you Mam🎉 learnt something new

Thank you for showing the negatives along with the positives excellent video I appreciate the hard work very educational

@BelindaCarr

2 жыл бұрын

Thank you, Andrew!

Thank you very much for the video. Could you please share the link to the video that talks about how ancient Egyptians made the pyramids using geopolymers? I looked for it on your channel but couldn't find it.

Wagner's - developers of Wellcamp - have been in polymer cement for years. They also manufacture fibre reinforced plastic cross arms for power networks.

There might actually be cause for some concern with geopolymer cement, the long life span might mean the particulate formed from the natural erosion gpc might become a breathing hazard and impossible to clean up if adoption reach the level of Portland cemen. Just a conjecture on my end though

This is the single most important topic on the table today, with relevancy to every human on earth. Thank you for posing such a concise explanation, of the technical aspects. So I must interject, that while Potassium (K) is usable in these equations, this is not a wise use of Potassium. Sodium based Geopolymer is just as good as Potassium laced GP, and conserves potassium for use in Agriculture. The use of Geopolymers is predicted to grow exponentially over the next decade. If we do not, there are going to be some serious short term and long term health issues for all humans. Over the last two decades, the worldwide average Oxygenation level (expressed as an overall percentage) has dipped over 1%. This is due in large part to the release of CO2 during the creation of Portland Cement. I propose a mandatory moratorium on construction projects which require Concrete. if we take a break, and then limit the total amount of Concrete which can lawfully be produced worldwide, we will have a solution. This requires a massive international effort, drastic steps, and severe economic and legal consequences for individuals and organizations whom will inevitably skirt the laws. Personally I can tell you without batting an eye that China is out. They will likely never fully modernize, until long after it is too late. But the rest of us can use this GP as an intended Gift from above. People need to begin to think in more sustainable context. The widespread new construction wave that has spread worldwide is choking the air, polluting the water, and causing material shortages in every market. Next year over 20 Million people will die prematurely due to chronic lung conditions caused and exacerbated by poor air quality, smoke, contaminants, and low Oxygenation levels. This could have been prevented if Davidowitz's theories had been properly pursued in 1979. It is a truly shameful state of affair, that corporations are permitted to shape the course of humanity. Even worse that they choose to ignore their responsibility and pursue deadly policies of using toxic garbage to manufacture the fake reality we have become trapped by. As a Construction Inspector and Energy Consultant in Southern California, I spend half my workday on construction sites. This week alone I have been out to over 40 sites. I am witnessing the use of GP in decorative and non weight bearing applications already. In fact many builders are using "GP mix kits" purchased online to make Fake Granite, Faux Marble, even Synthetic Diorite. My suggestion is that Builders mix fly ash, slag and waste ash together to make a contiguous mixture which may be easily replicated in the field. Fly ash can be added to conventional Portland cement to stretch the recipe. This was common practice until more research was done. So, it turns out Fly Ash and slag benefits the overall mixture considerably. The addition of ash to cement increases strength while also adding moisture resistance, it lowers the heat of set, increases plasticity and decreases the water need. The result is a concrete that is harder, stronger, more water tight, and requires less to create. In Southern California we use 13% Fly Ash by weight. This mixture is a level which was agreed to by many parties, regarding many factors including cost, time, and usability. However this is just a drop in the bucket. Lowering demand is the long term solution to the concrete problems. No matter what certain products will have to be made from scratch, even with GP. So we have to change our thinking about what is and is not necessary to build. If we do absolutely have to build something, maybe we can scale it down a bit. DO we really need more lanes on the freeway? How about going to work from 10 to 7 instead of 8 to 5? Little things add up...

Yes, interested in the subject of geopolymers and the Great Pyramids.

Looks like these waste products come from processes which also need to be heavily reduced or eliminated. 1. Burning coal is maniacally bad. 2. The process to get metakaolin are very energy intensive itself. 3. Slag has the same problem, though steel production seems unavoidable. One barrier is that it has many other useful applications. 4. The environmental problems of palm oil production are well documented. I also hope that we learned from biofuels that competing with food is not such a great idea.

A brilliant use of a waste product/s, that said we should be looking at the cause, the originators of the waste and finding alternatives that don’t produce the harmful waste products.

Belinda should do one on hemp crete. Very sustainable and can reduce not only water consumption but has a net zero carbon emissions. I would love to here your pros and cons on the matter.

Love your videos. :)

@BelindaCarr

2 жыл бұрын

Thank you, Dennis!

Definitely would like to have a better understanding of costs (knowing that economies of scale would control or reduce cost eventually). Seems like there are enough current applications where it could continue to prove itself as a great way to use waste materials. Thanks.

Grreat Viddy !

The biggest drawback is that fly ash is radioactive, you would be building structures that produced massive amounts of radon gas. My company looked at using fly ash back in 2007, we went with other geopolymer mixtures, steer clear of fly ash.

@WavegirlThinks

2 жыл бұрын

Would that still be an issue for structures like motorways or airport runways? Places that are well ventilated and where few people are walking around on them? Just trying to think of best-use scenarios. The more we can turn waste into useful products, the better.

@joeblundell299

2 жыл бұрын

@@WavegirlThinks I think if you do structures on that scale with a product like fly ash you have to control leaching into the ground water, air quality. I’m guessing heating it would cause it to off gas even more, places downwind of airports would have noticeably higher radon levels I’d wager, “might be EPA safe levels, I always question if their levels are applicable to newborns.” Some things really just need to be contained and not put back into the stream of use, I believe fly ash is one of those. Joseph Davidovits has many geopolymer recipes, My company’s been working with recipes based on his research for almost two decades, we incorporate aeration methods and more modern additives like silicon carbide whiskers. Geopolymers are the future, but we always have to look at everything we’re putting in.

@nedisawegoyogya

Жыл бұрын

But kaolin is not tho

@WavegirlThinks

Жыл бұрын

@@nedisawegoyogya yeah, he was saying how he uses other biopolymers but not those that use fly ash.

@joeblundell299

Жыл бұрын

@@nedisawegoyogya There are dozens of geopolymer recipes in Davidovits book, and many old Roman concrete recipes that do the job. I just wanted to warn folks about fly ash products, there have been companies slinging that toxic trash at people for decades now, it’s a crime that our children will pay for, radiological decay rates shouldn’t be a factor in your homes construction.

I've also thought about the blocks on the pyramids being poured-in-place as opposed to mined from a quarry. It makes sense, considering the weight of each block.

@oldguy1030

10 ай бұрын

There really are several big problems with the idea that the blocks were formed in place. 1. The quarries from which the stones came have been identified. In at least some cases there was writing documenting the pharaoh of the time. 2. There are Egyptian depictions of blocks being transported on sleds (with a man at the front pouring a liquid onto the sand). 3. Then there is the documentation from Merer. The oldest known papyrus (dating back to the time of Khufu) is a sort of diary/accounting for the activities of his crew and how they transported casing stones from a quarry to the area of the Great Pyramid. Interestingly, his notes were found far from where his casing stone activities occurred - it seems likely that he had transported his boat to a different location to support copper mining/processing. There area lots of things we don't really know about the pyramid construction (heck, there is a void in the Great Pyramid which we don't know how to access). But we do know that the stones were quarried. It is also quite clear that a good portion of the construction was not of precisely fitted stones - and there is (IMHO) good reason to believe that a whole lot of the more central volume of the Great Pyramid is debris from the quarrying. The idea of stones formed/poured in place is attractive but it is inconsistent with what has been learned over the years.

@ProblematicT9k

9 ай бұрын

⁠​⁠​⁠@@oldguy1030the great Pyramids are over 10 thousand years old ..the real people who built them where long dead before those depictions existed ..they discovered them not built them..to put it short there is no way those blocks can be pulled ..they where built on site

@5naxalotl

6 ай бұрын

@@ProblematicT9k pyramids are not 10000 years old. this is just a fantasy that you've seen on some clickbait documentary made for gullible people. oldguy1030 is citing actual science, which rejected the cast block hypothesis decades ago. you should learn how to cite real research yourself

I’m curious if cementitious “green” wall systems like SIREWALL or other products with carbon mitigation/offset targets will pivot to using geopolymers vs Portland for their binders. Cement seems to be the big BUT when looking at the sustainability of these solutions. Plus, their goals and scale may position them in the ideal market for geopolymer cement as opposed to more commercial manufacturers focused on consistency, availability, and bottom line.

Very cool video

Interesting material indeed

Brilliant! I hadn't heard of geopolymers, but I stumbled upon Roman concrete, which substitutes slaked lime+traces of salt for the Portland cement. It sounds like it would be more earth-friendly, but I don't really know how to find out if that is true or not. Fabulous content - keep up the good work!

@BelindaCarr

2 жыл бұрын

Thanks, Linda!

@corail53

Жыл бұрын

Nothing we do is "earth-friendly". Sorry to burst the bubble on that one. We are at a point where we are just marketing solutions of being slightly better than the previous. If we wanted to build true enviro friendly, we would all be living in stone/wood houses like we did for most of our existence or adobe mud in the hotter climates. These things still have an environmental cost, however. The computer or device you are on is not environmentally friendly in any way shape or form, most modern tech isn't either.

@lindacgrace2973

Жыл бұрын

@@corail53 100% correct! Since I am unwilling to give up modern technology, I seek ways to mitigate the damage. Most human activity is damaging, but with intelligent design, we can reduce that initial impact and restore or regenerate the environment in as many different ways as possible. The Green Line project is regenerating forests and grasslands on millions of hectares of north Africa. The Chinese government regenerated the Loes plateau - an area the size of the Netherlands. There are community-supported regenerative agriculture projects reclaiming and reforesting millions of hectares in India. In the middle east, regenerative agriculture demonstration sites are spreading the word on appropriate water harvesting and cropping techniques. There are scientists who are developing bacterial cultures capable of eating our plastic landfill wastes and returning usable products for us. There are other groups of scientists who are developing fungal cultures capable of cranking out plastic substitutes that are far more eco-friendly than petroleum based products and those should be available on the market within a decade. There are dedicated groups tackling agricultural land degradation, deforestation, mining of antique irreplaceable aquifers, industrial pollution, etc. In short, I think the alarm bells have rung and enough people are working towards solutions that we will turn the corner - hit the tipping point - within my lifetime. Can I build a zero-impact house? Nope. Not and have any decent quality of life. Can I build a net-positive house that returns more to the environment than it takes out? Yes. Indeed, I can. Please explore Biophilic Design principles. I can live - in a suburb - completely off-grid. My home will be highly efficient. It will have the lowest ecological impact that I can manage, harvest 100% of the water I and my garden need, produce more energy than I can use, and provide habitat corridors for local wildlife. It isn't a perfect solution, but it's the best we have right now and there is enough concern that it will continue to get better. So, keep calm and carry on searching for better solutions.

A very well done research and presentation Belinda. The pyramids. I was not aware. I think the Pantheon in Rome is made in this way. Even more interesting, Puma Punku in Bolivia. Unfortunately i got to know about this place 15 years after i was in the neighborhood (Lake Titicaca) Where in Europe can I get a mixed, good quality cement/raw materials as i would like to try for a special formed "brick/stone"

remarkable, thank you