Roman concrete which has a large portion of lime, also used sea water, not fresh water. In concert with the lime, years of rain seeping into the cracks reacts with the unreacted lime and provides a level of "self-heal" capabilities. Don't get me wrong, I love geopolymers, the ancient Mayans/Aztecs used it a lot to get those funky "impossible" cut monolith stone blocks in their architecture.
Geopolymer can get the same self-healing with Mg(OH)2 as Roman pozzolan gets from Ca(OH)2, though. And with far fewer, smaller cracks, this 'carbon cure' self-healing is more efficient.
With the standard 5% hardening agent, the working time (pot time) when the mix is soft and usable is about 1 hour at room temperature 70° F. Double the amount of hardening agent to get 30 minutes of pot time. Without it, the working time is about 3.5 hours at room temperature, but the hardening (curing) time will be about 24 hours and you may want to accelerate curing speed by heating the binder.
You say this material is stronger than regular Portland cement well if it's not much stronger then why don't you guys introduce it to the federal government and the military and see if it can be tested on some of the things that they used to have us do with Portland cement so you can see how much stronger your stuff is compared to what we were doing with the military and and buildings when we were testing I like to see your material you say how strong it is let's see it
Actually, the military has already been using it since the 1980s to repair concrete cracks in airfields. From what I heard, the geopolymer repair mortar is mostly all that is left of the abandoned runways. Alas, the company that supplied the geopolymers, amongst many other products, went bankrupt (for unrelated reasons).
Geopolymers might be able to compete with the cement industry until it has proven itself to be as durable and long lasting as cement and even then it will not replace cement, ever. That is just a fact of life. It's like challenging to replace the oil industry or the tire industry it's never going to happen.
Nothing positive ever happens when people, presented with a remarkable idea, simply walk away and say, "It will never happen." They said it during the transition from whale oil to crude oil. They said it during the transition from wood to concrete. They said it as the world transitioned from rail travel to planes and jets ...
Roman concrete which has a large portion of lime, also used sea water, not fresh water. In concert with the lime, years of rain seeping into the cracks reacts with the unreacted lime and provides a level of "self-heal" capabilities. Don't get me wrong, I love geopolymers, the ancient Mayans/Aztecs used it a lot to get those funky "impossible" cut monolith stone blocks in their architecture.
Geopolymer can get the same self-healing with Mg(OH)2 as Roman pozzolan gets from Ca(OH)2, though. And with far fewer, smaller cracks, this 'carbon cure' self-healing is more efficient.
What's the cost of a yard of Geopolymer vs cement which is about $158?
The cost is important but it is not the per yard that matters but the cost for an equivalent structure. Since it is much stronger
Looking forward to watching the success of Geopolymer International. Nice video.
Thanks!
Cure times? Relative cost? Impact resistance?
With the standard 5% hardening agent, the working time (pot time) when the mix is soft and usable is about 1 hour at room temperature 70° F. Double the amount of hardening agent to get 30 minutes of pot time. Without it, the working time is about 3.5 hours at room temperature, but the hardening (curing) time will be about 24 hours and you may want to accelerate curing speed by heating the binder.
@@TarekMaassarani Thank you
Why do I only see it used in 3Ds and not pour forms? Can you pour a foundation with GPC?
Interesting. What is the isolation property and cost in relation to portland?
How do we buy the geopolymer mix to work with it and test it?
Piers for riverfront?
ever been to Rome, 2000+ year cement in the domes with no Rebar. so what took you so long and will the Unions let you use it
I hope so!
Shortage of fly ash in the USA sounds like a major problem to me.
That's precisely why we've backed away from fly ash based formulations.
You say this material is stronger than regular Portland cement well if it's not much stronger then why don't you guys introduce it to the federal government and the military and see if it can be tested on some of the things that they used to have us do with Portland cement so you can see how much stronger your stuff is compared to what we were doing with the military and and buildings when we were testing I like to see your material you say how strong it is let's see it
Actually, the military has already been using it since the 1980s to repair concrete cracks in airfields. From what I heard, the geopolymer repair mortar is mostly all that is left of the abandoned runways. Alas, the company that supplied the geopolymers, amongst many other products, went bankrupt (for unrelated reasons).
Hill Incorporated still has a geopolymer based product that repairs cracks in concrete and brick buildings I have used it on too.
@@bsuddzen how long is a last for
I think geopolymers might become the new cement industry.
Might.
It's all about your marketing.
But is it worth the 2x cost?
is that 2x the cost for 8x strength?
Geopolymers might be able to compete with the cement industry until it has proven itself to be as durable and long lasting as cement and even then it will not replace cement, ever. That is just a fact of life. It's like challenging to replace the oil industry or the tire industry it's never going to happen.
Nothing positive ever happens when people, presented with a remarkable idea, simply walk away and say, "It will never happen." They said it during the transition from whale oil to crude oil. They said it during the transition from wood to concrete. They said it as the world transitioned from rail travel to planes and jets ...
I totally agree 👍👍