Unlocking the DNA of Fly Ash | Performance based prediction of fly ash in concrete
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- čas přidán 25. 08. 2024
- I call this video unlocking the DNA of fly ash because it provides insane new insights into the chemical consistency of fly ash and how we can use this information to predict the compressive strength performance in concrete. I have published a number of papers on this topic and I am working on several more. Here are some of the papers:
www.dropbox.co...
References:
Kim, T., Ley, M.T., Kang, S., Davis, J.M., Kim, S., Amrollahi, P., “Using particle composition of fly ash to predict concrete strength and electrical resistivity”, Cement and Concrete Composites, V107, 2020, doi.org/10.101....
Kim, T., Davis, J.M., Ley, M.T., Kang, S., Amrollahi, P., Fly Ash Particle Characterization for predicting concrete compressive strength, Construction and Building Materials, V 165, pp. 560-571, 2018, 10.1016/j.conbuildmat.2018.01.059.
T. Kim, M. Moradian, and M. Ley, "Dissolution and Leaching of Fly Ash in Nitric Acid Using Automated Scanning Electron Microscopy," Advances in Civil Engineering Materials 7, no. 1 (2018): 291-307. doi.org/10.152...
Kim, T., Hu, Q., Ley, M.T., Aboustait, M., Bullard, J.W., “Using Particle Characterization to Study Fly Ash Dissolution and Leaching in Water and KOH Solution.” ACI Materials Journal, Vol. 116 Issue 4, 2019, p5-17.
My website is:
www.tylerley.com
If you would like to donate to my channel please visit
www.tylerley.co...
A huge thanks to Jessica Ley, my soul mate, for editing this video. - Auta a dopravní prostředky
Hi Tyler,
7 years of research packed in a 13 minute video. Talking about compression...
The complexity of concrete amazes me every time I watch one of your video’s. Thanks!
“Check me out on da gram” 🤣
Thanks so much!!!
Your explanation has greatly simplified the concept. Thank you! It clarified why fly ash performs well in some research papers but proves ineffective during testing.
I have been delivering concrete for 25 years and never knew what fly ash was. Until now, Thank you.
This is very cool! To create innovative ways to analyze flay ash waste pools to find useful material for concrete, because the present "shortage" of fly ash is stupid. Last I checked price, fly ash (for concrete) was more expensive than portland cement, creating a perverse CO2 incentive. Our local plant was actually substituting cement for fly ash because they couldn't get any - while all these waste ponds are overflowing with the stuff. Good work!
Thanks so much! Some people are staring to use ponded ash. We need to get this done in more places.
Have you found that the source of coal makes a difference? Do different plants produce different fly ash from the same coal source? I sure wish I still had the full engineering report from the Powell dam where they did some major pioneering work with fly ash. i knew one of the cheif engineers from that project. They surmised that a 20% replacement was in order for the dam project. I recall that there were concerns with the exothermic build up may have been the reason they held it at 20%. The fly ash used was generated by the Clarkdale AZ cement plant, which was built specifically for the project. I wish I was still in the game and wish I had more to offer you. This is incredibly important research you are doing Tyler. All the best!!
Thanks for the comment!
The coal does mean a lot as that is the raw material that is combusted; however, it is more complicated than that. It has to do with the burner design and the cooling rate of the ash. We know this because we can track coal trains and where they take material. We can follow the same train going to the different power plants and we find that the fly ash that is produced has a different set of groups. If I could team up with a utility then we could REALLY make some cool breakthroughs. That is one reason I asked for people to reach out that had a similar interest. There is a lot more to come on this subject...
@@TylerLey What’s the easiest way to reach out? Very long story short, I’m trying to get research done on improved Rammed Earth for it’s application in 3D printing. I’d love to get in contact and see where we can work on this stuff together.
@@thunderofgr how on earth are you using rammed earth in 3d printing? :)
@@chas180 Basically with a house sized form that the printer tamps along and compresses the next layers of earth as they’re added. There’s a company called Formearth that has a small prototype of an automated rammed earth machine. Very similar design but radically different execution and much smaller scale. Before the copyright lawyers all descend upon me, I’ve been working on this for years. Just getting the last few pieces into place for printed walls to be done this year.
@@thunderofgr that's amazing! Ping @automatedconstruction on insta when you are done if you want publicity :)))
The notification of this video was a pleasant surprise.
Thanks Paulo! More to come.
Nice shirt, Freak! Good stuff Tyler. Thanks for this. Very timely with all the ash supply issues we are working thru down here.
Thanks so much!
Thank you professor I read your paper on cbm. Through this video you make me understand it well.
Thanks!!!
I was really glad to see this. I thought maybe CZcams had stopped letting me know you had put out videos, glad to see it and really enjoy your work.
Thanks! More videos coming. I just took a breather.
@@TylerLey We all have done that, no worries, quality over quantity is what I prefer.
Thank you so much Tyler, this is so intersting and the way you explain every topic is so well understood! Also - it seems like the team behind it is really good.
Thank you so much! I have an amazing team and I am so thankful for them every day. Thank you for highlighting them. Take care and thanks for watching.
After a long break Tyler. Nice to see you back with Ash.
Thanks for noticing. We all need a break sometimes. =)
Lots more videos coming and I have some new friends to help me.
Great job Prof. Ley and the team!! Keep going.
Thank you so much!
Add a rust inhibitor to the cement to protect the rebar. This can be as simple as adding zinc in the mix to act as an sacrificial anode. No need for galvanizing.
Thanks for this great presentation.
I just discovered your channel tonight. You are the 21st Century Vitruvius!
It is fascinating to contemplate what the best concrete recipe might eventually be … Tarantula curve aggregates with fly ash, carbon fibers, SRAs, and basalt rebar-that might have millennia-long Roman longevity?
Exciting times.
Super work
Loved it
Started watching your video.... Your explanations is just awsome.It is blowing my mind....
Thanks a lot.
Awesome insight. Now for a way to sort the particles accurately by group to create optimal SCMs for each application.
Sir, you replied almost every positive feedback but why don't you answer to some important question regarding the downsides of fly ash.
Thanks! This is really interesting, hope your analysis methods and instruments will see a good use in the future!
Me too! We have some cool new stuff that I will talk about in future videos. Stay tuned!
@@TylerLey Prof Ley, I have two sets of questions that I hope you can help me with.
1. Can fly ash stored a long time, say a few years, in a landfill and having being rained upon during this time, be used directly the same way as fresh fly ash, in concrete and brick-making?
2. On average, if you discount the transportation costs, is fly ash more likely to be given away or sold in the US? Thank you.
I have a fly ash problem building up in my country.
@@ferrarim5p75 czcams.com/video/nuiBVGOe6nI/video.html
problem is the cement companies now charge you extra for flyash, and pocket the difference
Ash Ponds and Landfills are HUGE hazards to water supplies (Look up some of the major spills, also all liners fail eventually). Stabalizing + Distributing the waste in concrete use would be much safer.
en.wikipedia.org/wiki/Ash_pond
en.wikipedia.org/wiki/Kingston_Fossil_Plant_coal_fly_ash_slurry_spill
en.wikipedia.org/wiki/2014_Dan_River_coal_ash_spill
And as they age, more will fail. All the more reason to encourage concrete usage. More concrete, less landfill !
Interesting stuff about fly ash+machine learning+concrete+self organizing map (SOM)
Here's hoping that fly ashes from other parts of the world don't have a group 10, 11, and 12 not observed in combusted US coal.
Did you see where some fly ashes had insignificant quantities of various fly ash groups? I could see a potential issue with the model being used on fly ashes which lacked one or more of the major contributing particle groups deviating significantly from the 9-particle group model.
Hi Sir,I'm about to start my Masters in Structural Engineering. Your videos are very interesting as well as informative.Thank you.I also wanted to increase my understanding in structural engineering concepts.
All the best to you and good luck on your MS. Thank you for watching and for the kind words!
Super interesting
What about trace elements from mercury to ...? I mean just look at steel what trace elements can do.
This is a very good explanation about the chemical composition of Fly Ash. In the video you have told low content of iron has impact on the strength. However higher content does not have any. Although you have justified this based on literature, but is there any valid explanation behind this? I mean what is the actual reason behind the iron content being active at low content but not at high content? Thank you.
Could all this research, data, and AI now be used in reverse?
Instead of settling on a predetermined % mix of fly ash, you analyze the fly ash you've got and the algorithm tells you the perfect ratio for that particular composition?
Just stumbled onto this channel, and it's amazing!
Thanks!
Yes, I think you could do this. It depends on the property that you want in the concrete. If you pick that we could tell you the exact amount to get it.
Fly ash isn't useless even in other applications, it's also used as a component for ground stabilization. Search for the title "Fly-Ash-Stabilized Gypsiferous Soil as an Embankment Material"
Yes but here It is does far more good to the environment by reducing the amount of portland cement ( 8 % of world CO2 comes from cement) and it is reduces a lot of cost in construction too.
Hi Tyler, great stuff. Half around the globe, that fly ash gets deregulated. It's happening.
Thanks for this Mineral Admixture Updates.
Sorry but I don't. I have only used half cell potential for this.
Long time. I have missed your videos.
Thanks so much! More to come.
Yet another informative video! I shall go home tonight and reflect on this new knowledge, then I might whip up a fruit salad and watch the matrix. 😂🙏🏻
Hi Tyler 👋
Can you give me the suitable answer about this
Why fly ash reduces electric conductivity for concrete?? And how 🤔
more about flay ash pls
I want to send a sample of my local fly ash somewhere and have the results available on a public website - so everyone considering fly ash uses would be confident. Um, everywhere. Who is funding this research service? Also, is fly ash being bagged up - like in used brewery grain bags, etc? And a lab performance rating too? Very cool.
When just 7% lime can make a "pad" - I'd like instead to fill tires with what can "consolidate" a percentage of Styrofoam chips and still have a load bearing CMU. A whole truck load of fly ash would be lovely. Now I want a big enough tent too, of course. Or, bags I can go get a load of somewhere. Oh, maybe with a lab report too? I'm thinking fence posts, air-crete, ... Please start this and put me on the email list. Thx
And whats the sweet spot? 20% 25% 30% when does the Fe agglomerate?
Great video!
Thank you Richard!
شكرا شكرا شكر
Im not an engineer but I find this amazing
Thanks Mark! We had a great team and a lot of hard work to get this far. I will have some more videos coming out on this. Machine learning is a very powerful tool if you have enough high quality data.
I have been having low breaks on some 7 and 28 day breaks where fly ash was incorporated. Must be low quality FA
Hey, instead of just shirts, can you make concrete freaks hard hat stickers?
Working on it!
Tyler,
Would you be able to make a video on the crossover effect i.e. why faster curing results in less strength and possibly less durable concrete?
Alex - Faster reactions build less efficient microstructures. These microstructures will have more imperfections and this will cause a deterioration in performance. I will see if I can fit it into an upcoming video.
Could Biomass Plants and Biorefineries be a New Source?
Great info! Would you know the best formula for creating a plasticized concrete mixture for sculptors? Best so far is 1pt sand 2pt cement, 20% metakaolin (hoping fly ash will do). Liquid with 10 to 20% acrylic solids, some sugar and fibers. The goal is a conc that acts more like clay before setting. Would you know of any way to make this better? Will fly ash work as a metakaolin substitute? I think concrete for sculpture would get you a lot of hits. Thank you, Cheers!
Thank you so much for all the information. Wanted to ask - do you know of any research on ICF? Like - longevity, and how it should be cured, and so on. Thank you!
Not that I know of
@@TylerLey Thank you!
Is it possible to replace fly ash with OPC 100% . Please guide me if you have any information regarding that . If we not so have much maximum percentage we can use in our geo-polymer concrete with silica fume
Im project managaging my own build with icf, i was considering using fly ash since im planning on a east coast area, i want to have huricane resistance. But in not rich, im bowwing thr money to business and we are a non-profit. Any recommendations?
Hi Tyler love your videos I am concrete contractor here in New York City I do large commercial and public work and I still learn something new every time I watch your videos! Fly ash and GGBFS are cement substitutes correct, how exactly does that add strength to concrete if your substituting it for portland?
Mike,
Check this video out:
czcams.com/video/0wOCn7smmIs/video.html
Short answer - They either act as cements that are chemically activated by the portland or they react with the calcium hydroxide from the portland cement reaction to form more binder. Watch the video as it does a better job than a single sentence. =)
I love your insight into concrete. I am intending to purchase a 3d cement printer. The company that I am working with adds fiber, but I am not sure about fly ash. Fly ash is cheap and use is environmentally friendly. I am in north Texas and I would love to hear your ideas about use of fly ash in 3d printing. How does it change the viscosity of the material
? What about fly ash in foam or low weight concrete to be used as an insulator? Where would you recommend that I attempt to get my fly ash or the name of the fly ash you would recommend in the DFW area? Thanks
Homie, no mention of Chemtrails, Weaponization or Weather Manipulation of Coal Fly Ash.
Like Fluoride, got to find it's Military uses first.
isnt also radioactive (on long term ) ?
Nice informative video. I'm trying to use fly ash in aircrete. With all benefits of fly ash, what are downsides of it? I know it is a carcinogenic material, how risky is it for people handling it even with masks on?
Its been so long I thought the world of concrete was cracking like the West Seattle Bridge... or like the promised years ago Aircrete tests... you say 30 some flyash samples from where would be interesting to see the sampling sites on a map... then please address how segregation and classification could be accomplished by a production plant... and the likely cost for a specific flyash mix... while I see the benefits I doubt the costs justify the benefits nor the willingness of producers. Concrete might be the largest man-produced product in the world but lets KISS with a few mixes with specific properties - will flyash change the industry for better concrete or a lower cost? Only time will tell us... THANK YOU for researching the details and providing new concrete freaks for the world. :-)
Thanks Douglas -
There is no need to do anything fancy. This can help people better predict the properties of the concrete they are producing and to help them choose one fly ash over another. This can also be used to investigate fly ash sources that don't meet current specifications and are being land filled. Another great application is to investigate fly ash stored in ponds and land fills and help them to be used in concrete. The refinement you are mentioning is also possible and it may be easier than you think. =)
If we don't know how a system truly works then we will never be able to control it or harness it for the greatest benefit. Get ready, the world of concrete may be very different in a few years.
@@TylerLey The West Seattle Bridge is a good example of a big screw up... now that the bridge has been closed because of concrete cracking aka no one wants to say publicly why there are cracks but concrete Freeks know - post tensioning failed... so now the " experts" have sold Seattle decision makers, yes, the same ones who didn't properly construct the bridge to begin with, now approving $70 million to carbon-fiber wrap the bridge in an attempt to salvage 10 more years of life out of crumbling concrete... Science has been thrown out the window with the baby and bath water... Would the last person leaving Seattle turn out the lights?
@@TylerLey "the world of concrete may be very different in a few years." Please explain where you see the world of concrete going to. Thanks in advance.
Hello Tyler! I have a question. Why DIY builders add salt (food grade salt) to the cement paste? Is it helpfull on low temperatures? Is it bad for a concrete durability? Thnx!
If there is steel in the concrete then it is really bad. They add the salt to increase the rate of strength gain.
@@TylerLey Thank you!
Very cool work. I am looking for collaborators to do similar research with other industrial waste
Awesome! Let me know if we can help.
Thank you
Thanks so much!
Ok❤
You rock!!
No, YOU ROCK! Thanks for the comment.
How can we find classes of fly Ash, I mean which test we perform to know the classes of fly ash ???
Wait for your response sir
It was very entertaining and informative. but in the end it didn't arrive any particular conclusion. That's okay though as you promised more info for next sessions.
Thanks tyler I pour most with fly ash concrete did some of my own research a few weeks ago because the concrete had a strong ammonia smell when we were pouring the pours also had alot of plastic shrinkage cracking before setting hard have you done research on contaminated fly ash and what could be the result for durability and set times compared to fly ash with out high levels of ammonia
Fly ash can block bleed water so the top starts to dry out, especially on very hot days.
Bryan - I have not done a lot of work on this. Ammonia is used as a way to reduce air pollution during coal combustion. If you can smell it that strongly then you should complain to the supplier. I have not heard of the ammonia causing any side effects to the concrete but it might.
Amazing video. I have to get me a concrete freak shirt.
Sweeet! Send me a pic if you do!
@@TylerLey instagram.com/p/B0OCOhqgrM2/?igshid=12z4ea1s7v7om
What state(s) does the coal come from that makes the best flyash?
Or what state or region did the coal in each of the 9 groups come from?
35 fly ashes were investigated from all over the US. Most of them are from the midwest, south, and east coast.
The best fly ash is the one that you have available to you. =)
What part does the aggregate play, e.g., desert sand, crushed basalt? I live in the Las Vegas Valley and have heard there is an old decommissioned power plant outside town. Would fly ash work with desert sand or lava sand? Can I avoid expensive Portland cement, altogether for a security wall?
I used to use fly ash in my work in the Verde Valley outside of Sedona. I had a modified adobe mix as I called it. They have something called unwashed bedding sand which has a mix of particle sizes, some silt and a decent amount of clay, less than 10%. To a yard of that, I would add 50lbs of fly ash and 50 lbs of portland. It would hydrate well and set up with over 1000psi of cured strength. Hope this helps
Don - Great question...
You can use some fly ash by itself and it will hydrate; however, it is often better if you combine it with at least some portland cement. See the other comment from "We are Miles..." for an example. We could use this model to do some analysis on your fly ash and tell you a lot about this. We could use this technique to help people identify what fly ash reserves are valuable and which ones are not. Also, you can definitely use desert sand or crushed basalt in this concrete. You just need to know how to design the concrete mixture. Watch the videos about the Tarantula Curve for more details.
@@wearemilesfromnowhere4630 I'm thankful. I need to check the clay content, but for a security wall I now know it I find zero clay I need to add about 10%.
@@1voluntaryist depending on the clay, I have not gone over 10%. I would stay away from the green clays. What you want is just enough to make it stick to itself but not so much that it swells and contracts to create cracks. It's a bit of an art. I think I recall some clay deposits up on Mount Charleston. Look for shallow pools after a good rain then look for cracking on the surface. You can skim that top layer. Natures slaking done for you.
Hi.
I am student.
my I ask you sir, how to calculating for mix disign ultra high concrete 150 MPa with disign value of slump 150 mm
This is challenging to answer in a few sentences.
sir where were you for the last 3 months or so
I took a break! It is good for the soul so that I can come back and give you more videos. Thanks for noticing and look for more soon!
Hi Tyler you never Talk about Xypex do you know about it...
Xypex. com
I would like to hear about it
and how it works?
Jesus Christ Bless you
Thanks John - I have a video coming on this and other internal water proofing agents. Stay tuned!!!
I really want to see your input on this subject.
thank you
I am interested in working on this with you. What is the best way to communicate with you ?
www.tylerley.com
Fly Ash ...humm.
Bro have you ever tried to finish fly ash concrete? That stuff is so garbage it's unfinishable. Yall needa leave that stuff at the landfill.
I'm a flyash provider
Fly ash sucks!! The problem with Portland concrete is they mix this crap in with it. Concrete lasted longer before fly ash. Concrete poured 50 years ago was way stronger and lasted longer. Now we depend on China because we need the ash which is pulverized coal to mix into Portland concrete to make it cheaper. Now concrete begins to breaks up sooner and water gets into the concrete causing it to expand and turn to a gell inside breaking up and turning yellow. Hairline cracks expansion. Concrete only lasts 20 years now, but concrete poured in the 1920s is still in existence and in good shape.
i wonder if the type of coal makes much difference?..
i don't have any....