Concrete reality

[argonsagas]

Concrete is a ubiquitous product used in the construction of thousands of things across the planet, some of which most people never even thought of . (example: I have been a crew member in races on Lake Ontario in a cement-hulled sailboat)

It is simultaneously one of the most useful man-made products and one of the most dangerous things affecting our future.

This article explains:

.https://www.noemamag.com/concrete-bu...destroying-it/

[oldGSfan]

I have been thinking about concrete recently A town near me in Washington state is named Concrete. Pretty cool area. On a nice day recently I got some pics of the historic bridge in town which when completed in 1918 was the longest the longest single-span reinforced concrete bridge in the world. I need to read the full article, but I know the Romans had a good recipe.

[dpep]

Good article. I was already aware somewhat of the issues with regard to cement/concrete. But the author I felt conveyed the complex role it plays in a way that was instructional and at the same time an enjoyable read.

[Suzukian]

USS Selma, a ship made from concrete in WWII.

AE7JU4OQQVHCJGDUOSEEKUYZL4.jpg

[argonsagas]

Thanks for that. I had never heard of Selma until now. She was certainly a LOT bigger than the tiny sailboat I was on.

Here is an interesting article on her, and a few similarly constructed ships.

https://www.escsi.org/e-newsletter/u-s-s-selma/

[kerrfunk]

Good information in the article
(although truthfully I quickly scanned most of the text to get to the gist)
I had not considered the production cost of manufacturing cement. It's a lot!

My first wife's best friend got a masters at Milwaukee School of Engineering back in the day. I remember being astounded that you can take masters-level courses in concrete.
Far out.

[Suzukian]

Concrete, especially Portland Cement, is quite a science. The Roman's developed Hydraulic Concrete but the knowledge was lost for over a 100 years, if not longer. People thought the wooden markings on the ancient ports was fossilized wood, till a scientist pointed out that it takes magnitudes longer, and that's when it was realized the Roman's were pretty smart.

[dpep]

Roman buildings made of concrete are still standing after 2000 years, something modern concrete construction cannot even approach, It appears that scientists have finally figured out why. Their findings could have a big impact on concrete construction going forward including its carbon footprint,

https://www.cnn.com/style/article/roman-concrete-mystery-ingredient-scn/index.html

[rphillips]

I know little about concrete. That being said, I couldn't believe it when it was reported, in 2022, the Nashville NFL stadium, built in 1999, has deteriorated to the point it isn't worth rehab....Just very hard to imagine a 23 yr. old structure of concrete and steel could be in this bad of shape in this little time... I hate always being so skeptical, but did the folks overseeing this project know in 1999, if we build this thing right, we can get another new one in appx 20 or 25 yrs. Shouldn't any concrete and steel structure normally last longer than this, unless something was intentionally designed into it to make it fail sooner?

[argonsagas]

Roman buildings made of concrete are still standing after 2000 years, something modern concrete construction cannot even approach, It appears that scientists have finally figured out why. Their findings could have a big impact on concrete construction going forward including its carbon footprint,

http://ttps://www.cnn.com/style/arti...scn/index.html

"Secure Connection Failed"


and did the same on several repeated attempts.

[Brendan W]

https://www.irishtimes.com/news/ireland/irish-news/pyrite-in-mayo-we-worked-hard-we-bought-our-house-in-good-faith-1.4592276

Corners being cut?

[Suzukian]

I remember how concrete was so water down (many decades ago) in buildings in Philadelphia (I was living there at the time, reading up on some of the history), the water would eventually come out of the bottom of the form, and whatever was left would would kind of solidify, but not into anything useful, and had to be redone. All Mob related of course.

[Cipher]

Lord Beaverbrook owned or had controlling interest in LaFarge at one time. A few collapses occured because of malfeasance though he was shielded.
Dirty POS

[dpep]

"Secure Connection Failed"


and did the same on several repeated attempts.

Try it now.....

I corrected the link in my post. The link in your quote of my post is still bad.

[argonsagas]

Try it now.....

I corrected the link in my post. The link in your quote of my post is still bad.

The replacement works, but the {story{ is incomplete.

Within that story is another link that gives the actual information:

https://www.cnn.com/style/article/roman-concrete-mystery-ingredient-scn/index.html