• Graphene 'a game-changer' in making building with concrete greener
    9 replies, posted
https://www.theguardian.com/environment/2018/apr/23/graphene-a-game-changer-in-making-building-with-concrete-greener Is there anything Graphene can't do?
Being produced on industrial scale and being cheap to produce. Hope those can change like it did with carbon fiber.
Basic math, write a short story, feel love... Quite a lot of things I'm curious if this has any effect on the structural integrity of a building tho.
i mean all concrete is cement, broken rocks, sand, and gravel. Adding graphene to the mix shouldn't really hinder it's integrity.
Ehhhh. The reason concrete is used is because its cheap as shit and its easy to get a fuckton of it. Not really the same with graphene. Also papers have been out about this for a few years now, I remember trying to copy the procedure from some chinese paper and it never ended up working a couple years back. I don't have time right now to actually go over this specific work, but I will soon and will offer my ~expert opinion~.
Graphine and Hempcrete meet n' fuck when? Seriously, both compounds could easily revolutionize the scene of architecture/infrastructure.
A replacement for the concrete would be nice as its non-recyclable and also incredibly wasteful to make as it requires a specific kind of sand to actually work right.
Never heard a more true statement about graphene than this: Graphene can do everything except leave the lab
I'm guessing the effect is similar to "mechanically stabilized earth?" A bunch of flat sheets adding tension reinforcement: https://www.youtube.com/watch?v=0olpSN6_TCc
I'm not going to go all out and say that their results are wrong, but definitely misleading. They tested water/cement ratios of 0.57 for cubes and 0.50 for bars, this is quite high. For example, our lab's standard water/cement ratio is 0.43, which is approximately the amount of water needed for complete hydration of the cement. The reason they used such a high ratio is because of how viscous the suspension of graphene in water becomes - even such a tiny amount of graphene just has massice amounts of surface area to volume, that it demands much more water for it to flow. At this amount of water content, you're weakening the concrete by introducing unnecessary porosity. Compare strength results to a realistic system and you will likely find the results to be much closer.
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