Visualizing cement hydration on a molecular level:
The concrete world that surrounds us owes its shape and durability to chemical reactions that start when ordinary Portland cement is mixed with water. Now, MIT scientists have demonstrated a way to watch these reactions under real-world conditions, an advance that may help researchers find ways to make concrete more sustainable.
[...] Cement in concrete contributes about 8 percent of the world's total carbon dioxide emissions, rivaling the emissions produced by most individual countries. With a better understanding of cement chemistry, scientists could potentially "alter production or change ingredients so that concrete has less of an impact on emissions, or add ingredients that are capable of actively absorbing carbon dioxide," says Admir Masic, associate professor of civil and environmental engineering.
[...] Using Raman microspectroscopy, the MIT scientists observed a sample of ordinary Portland cement placed underwater without disturbing it or artificially stopping the hydration process, mimicking the real-world conditions of concrete use. In general, one of the hydration products, called portlandite, starts as a disordered phase, percolates throughout the material, and then crystallizes, the research team concluded.
Journal Reference:
Hyun-Chae Loh, Hee-Jeong Kim, Franz-Josef Ulm, et al. Time-Space-Resolved Chemical Deconvolution of Cementitious Colloidal Systems Using Raman Spectroscopy, Langmuir (DOI: 10.1021/acs.langmuir.1c00609)
(Score: 0, Informative) by Anonymous Coward on Tuesday June 08 2021, @10:26AM (15 children)
The EPA has a web page listing sources of greenhouse gases (https://www.epa.gov/ghgemissions/sources-greenhouse-gas-emissions). Have a look and total up the six categories: transportation 29%, electricity production 25%, industry 23%, commercia/residential 13%, agriculture 10% and land use/forestry 12%. According to my calculator, that adds up to 112%. Conclusion: these twisted AGW fucks are so intent on their agenda to bring us back to the stone age that they ignore basic math.
(Score: 0) by Anonymous Coward on Tuesday June 08 2021, @10:38AM (5 children)
>> they ignore basic math.
Saint Greta must have skipped that lecture.
Queue the downmods and defensive comments from the Greta fan club in 4..3..2..
(Score: 2, Insightful) by Anonymous Coward on Tuesday June 08 2021, @01:37PM (4 children)
I find your obsession with an autistic teenage girl simply trying (albeit naively) to make the world a better place quite telling.
In my experience, it's the sign of someone who's very insecure about his own masculinity.
(Score: -1, Flamebait) by Anonymous Coward on Tuesday June 08 2021, @01:50PM
Criticism proof patron saint of environmentalism. Same principle behind child suicide bombers.
You also assume the AC's gender.
(Score: 1) by khallow on Tuesday June 08 2021, @04:37PM (2 children)
It reminds me why I stopped reading Newsweek. They dropped the "news" part of the magazine.
Here, I don't see the point of complaining about someone's obsession with Thunberg when major news outlets are also obsessing over her.
(Score: 2) by DeathMonkey on Tuesday June 08 2021, @05:43PM (1 child)
Wow, EIGHT whole stories!
She's almost as newsworthy as Pizza Rat! No wonder you guys are so triggered!
(Score: 1) by khallow on Tuesday June 08 2021, @06:05PM
I take you missed the part where only US presidents (Biden and Trump BTW) were getting more climate change press. Pizza Rat doesn't get that kind of coverage.
(Score: 0) by Anonymous Coward on Tuesday June 08 2021, @11:42AM (2 children)
Except that according to your own link this isn't even true and you're a morally corrupt lying piece of shit, like all the fucking climate deniers I've ever seen.
(Score: 0) by Anonymous Coward on Tuesday June 08 2021, @12:30PM (1 child)
Your reading skills reflect your ignorance. Forget the pretty chart and read the text on that page. Add up the numbers, if the math isn't too hard for you.
(Score: 0) by Anonymous Coward on Tuesday June 08 2021, @12:41PM
You're wasting your time arguing with a brainwashed millennial.
(Score: 2) by HiThere on Tuesday June 08 2021, @01:18PM (4 children)
How about assuming that some sources fall into more than one category?
Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
(Score: 0) by Anonymous Coward on Tuesday June 08 2021, @01:33PM
Don't make the same mistake I did and try to wresle with a pig. You both get dirty, and the pig likes it.
The fact that some sources falls in more than one category is so obvious only a climate-denying retard wouldn't think of it. That tells you all you need to know about those shallow-end-of-the-gene-pool losers.
(Score: 0) by Anonymous Coward on Tuesday June 08 2021, @03:55PM (1 child)
Brought to you by the same people that use posters like this one:
https://cdni.rt.com/files/2021.05/article/60b168e785f540785375f73b.png [rt.com]
It would be clever, if dishonest, if they had added a 0 after the 14 cents to make it seem like $300k was $300M, but that isn't what happened, that 140 at the end is actually a footnote reference from the original source.
So, my question is, how much money did he spend to rail against 4 people's salary for a year and make it seem like that was too much to spend on science.
(Score: 2) by DeathMonkey on Tuesday June 08 2021, @03:59PM
My favorite part of that picture is how much Rand Paul looks like that coked out quail!
(Score: 1) by khallow on Tuesday June 08 2021, @04:27PM
(Score: 1) by khallow on Tuesday June 08 2021, @04:25PM
From the link:
So if you add the first five categories, they total 100% (up to round off error) as one would expect. If we were to include the land use/forestry category, then the first five would actually total roughly 114% with 12% of that 114% taken off by land use to get 100%.
Moral of this post: if you're going to complain about funny math, make sure your math isn't funnier.
(Score: 4, Funny) by KritonK on Tuesday June 08 2021, @12:16PM (1 child)
Even more exciting than watching paint dry!
(Score: 2) by DeathMonkey on Tuesday June 08 2021, @03:57PM
That one would help us reduce VOC emissions!
(Score: 0) by Anonymous Coward on Wednesday June 09 2021, @05:15PM
srsly?
i mean, they could just take like ... uhm ... 256 (transparent?) yoghurt cups, add (same amount of) cement and then put (same amount of) water in each cup BUT with a delay of say ... 30 sec?
then take a picture of the cups and stitch it together into one and voila you have a "movie" of how the cement sets.
nevermind.
facinating stuff, first it's a disconnected powder, you can shift it around, pile it up, divide it, then add water, a liquid (duh) and it becomes a half-assed sticky gooe-liqui-dish mass and finally it's one solid chunk ...
i wonder what the "affinity" for neutrino capture is during the stage of activating (adding water +mixing) to solid (can carry itself)?
also, what happens to the original process that generated the neutrino?
maybe beta-decay measurements have a "lazy" day if the path of the emitted neutrino should pass thru a cement pouring site a few hundred yards away? ^_^