Dreamcrete - The rest of the story - Shrinkage, Freeze Thaw, Aggregates, and Strength - PEM

This video gives more details about Dreamcrete and what kind of shrinkage, freeze thaw, aggregate durability, and strength that is needed for concrete projects. These are more insights from the Performance Engineered Mixtures or PEM efforts for highways and bridges.
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Thanks!

[@GreentopLandscapes]

Love it, so educational. Thank you

[@charlesviner1565]

I LOVE your channel ❤

[@jameswyatt1304]

Interesting to learn that the two strength assessments are well correlated. You introduce decision risk and a small extra cost if using two tests for one decision, so most folks won't or can't. ("Can't" because if the two results differ, your project manager and liability folks will not presume one's valid.)

[@BracaPhoto]

Thanks again for the deep dive Tyler 👍 Fyi - I'm gonna start using a release agent on my concrete cylinders unless someone tells me it's a bad idea 👍

[@NobbiesGnomeRescue]

@ Tyler : Thanks for the ,as always, informative video.. But, I’ve got a request, can I send you a plug of our mix for testing..? We use a polymeric blend to replace the available hydrogen from water. PSI @ 72hrs= 9,200psi @ 3months we are testing @12.500 (approx). Getting ready for testing at the Berkeley seismic lab, would appreciate the input. Thanks. PS. Mix is impervious to water and draws zero chlorides.

[@NobbiesGnomeRescue]

Pops. Core plugs are 8” dia, psi is compression. Span fail test to be completed at Berkeley.

[@concretelogicpodcast]

Concrete rocks!

[@_thedreamer_4740]

What Kind of cement do you recommend for a bonfire pit?

[@373640672634060457]

Hi Tyler, I really enjoy your videos. I noticed you like to use “scm’s” for topics of discussion, they all are essentially waste products; which makes them cheaper than the underlying binder: cement… you not only increase the properties of concrete, it is more cost effective and it is also more sustainable to use them in your mix. I have a few questions, and they might be an idea for another video. … I digress, I was wondering if it is possible to mix slag, fly ash and silica fume with cement all together!!! and if they can be mixed together, do they affect or hinder each other when mixed all together? … it would be useful to know how to properly harness all of the materials, because they are great materials, research into mix ratio for optimal efficiency; especially when all of the “scm’s” still operate under the original binder: cement …Is there such thing as too little cement in the mix? And if so, is there a minimum cement ratio needed for the concrete to even cure properly? I would be interested in your opinion on using it for aircrete. My aircrete would use foam and a foaming agent to add air into the concrete and drive down the costs even further! Aircrete is also relatively insulative and would be a very sustainable product to use, allowing for less use of gas; especially now that gas prices have skyrocketed. …I feel I am getting too excited, however… I would like your opinion on my concrete recipe that I have thought up, me personally I am not that intelligent when it comes to concrete so I would value your opinion. My aircrete would include: Steel rebar reinforcement, poly fibers, foam and purpose built foaming agent(turning it into aircrete), cement, class f fly ash, slag and silica fume. Mix together and poured into ready made forms. I am certain in my head that, I have not done enough research, and something will go wrong with this mixture?

[@prbmax]

So, If you are looking to do a home pore and you have different vendors to choose from, what questions should you ask them to know if they are in the know about these very issues? other than just what PSI concrete do you want?

[@robertspencer5219]

What about concrete for fresh and salt water areas for docks and boats?

[@fredsnit5699]

Examine … aggregate etc? What exactly am I examining for? How am I examining? Is anything you’re suggesting possible for any typical contractor?

[@TylerLey]

It takes work to figure these tests out but people are doing this now. Lots of people are doing this in the states that I highlight in some of the videos. Maybe it hasn't come to you yet.

[@SwedishDeathLlama]

Why does UHPC get to break all the rules? No coarse aggregate, no air entrainment, and tons of cement! Are the steel fibers that magical?

[@charlesviner1565]

You know I am FREAK 👍

[@RecalcitrantObserver]

I was wondering about 0 carbon concrete that the Canadian governmet is talking about Thanks Tyler

[@BracaPhoto]

If it sounds too good to be true .... but a Great idea to dump a bunch of money into 👍

[@ehsnils]

It's a bit of an exaggeration to call it zero carbon concrete since there are too many steps involved that releases CO2. The goal is to minimize the amount of CO2 from fossil fuels. A large part of it comes from the manufacturing of cement and the limestone itself releases CO2 when you heat it. It's common to use coal that now is replaced by other fuels and even electric heaters and plasma burners are considered. To lower the CO2 emissions even more the CO2 is caught using a process named CCS (Carbon Capture and Storage) where the CO2 is basically converted to a liquid and then pumped into the bedrock. But you also have CO2 from transports and from mixing the concrete.

[@fredsnit5699]

Nobody can spend months testing concrete particularly when you don’t know what comes in the truck is what you tested.

[@TylerLey]

You have to make sure your design is right to start with. That is where this begins. The next step is to make sure the truck is consistent from load to load. There are some new videos coming that talk about this.

[@interstellarsurfer]

They call it dreamcrete, because it doesn't exist in reality.

[@jonerlandson1956]

dreams... and... air... let's hear about it... aircrete?...