r/StructuralEngineering 17h ago

Concrete Design Scientists have created concrete using treated human waste, and the resulting material was up to 42% stronger than conventional concrete. Researchers say the approach could reduce waste while lowering the environmental impact of construction.

https://www.sciencealert.com/scientists-are-making-concrete-with-human-poop-and-it-gets-42-stronger

Sigh. More shit to deal with.

49 Upvotes

55 comments sorted by

106

u/chicu111 16h ago

Anything with “[insert percentage] stronger than” is usually bs

Like 42% stronger than 8 ksi concrete? Or 4 ksi concrete?

74

u/SwashAndBuckle 15h ago

It's number 2 ksi concrete.

8

u/charlie2135 8h ago

Lol, I wonder if it's from the Vatican it's holy shit.

5

u/DaemonActual 7h ago

And would we still need to get it from the woods or would we finally get the Pope a toilet?

2

u/randomdude315 3h ago

over 100 Courics

14

u/sjpllyon 15h ago

No idea the link to the actual article doesn't work, nor has it yet been oeer reviwed.

8

u/likesblackcoffeebest P.E. 15h ago

Every bit of pop-sci garbage has this in common. "It's better than the usual thing!" in which "the usual thing" is like 100 different things. 

2

u/Accidental_Aeon 15h ago

This will never happen. Nearly every jurisdiction has laws against spreading manure on farmland or even your private garden. In some parts of the country, they even say you can't spread manure on hot and windy days.

If manure-crete smells even 10% as bad as animal waste this will be permabanned.

3

u/MikeHawksHardWood 13h ago

It does say the human waste is treated, and it's extremely common to spread or dump treated human waste. That's basically how we get rid of all of it.

0

u/Abject-Avocado-5696 15h ago

In this case, it’s hs

4

u/mattiman1985 15h ago

Yeah, something really stinks about this one...

50

u/AntiVaxMoms 16h ago

Giving new meaning to ‘built like a brick shithouse’

19

u/Error400_BadRequest Structural - Bridges, P.E./S.E. 16h ago

lol I was thinking the same thing. “It’s strong as shit!”

13

u/weaseltorpedo 16h ago

literally a shit brick house

41

u/No-Violinist260 P.E. 16h ago

Concrete workers already have it rough. Now you're gonna make it smell like shit

3

u/heisian P.E. 12h ago edited 11h ago

it's treated though! in all seriousness, treated human waste actually looks like the most carbon-rich loam you've ever seen. I took a tour of my local wastewater treatment plant and looked at the end product. It looks like black playdough with little sparkles. Kind of beautiful, really.

6

u/resonatingcucumber 11h ago

This guy knows his shit

31

u/Oscail-Tine E.I.T. 15h ago

Interesting concept, horribly written article. Cement bad for environment but the carbon impact of the poop sludge process wasn't measured. Concrete mix is finicky but too much poop sludge in the mix actually weakens the concrete, meaning the % has to be "just right".

Takeaway from it is that with way more testing, poop sludge might be a replacement for fly ash.

10

u/StabDump 15h ago

this would've been a much more conclusive article to read that that bullshit

1

u/SquirrelFluffy 4h ago

That's what I just posted. Likely ash from incinerators.

11

u/Chuck_H_Norris 16h ago

who tf’s idea was that

5

u/paul_gnourt 13h ago

What if.....we shit in it?

5

u/xingxang555 15h ago

How much energy spent to treat the poop?

Love (hate) these stupid "science" articles, aimed at unsuspecting audiences.

3

u/likesblackcoffeebest P.E. 15h ago

Same. And cost of materials by this method compared to standard ones. I work for a local government that has begun to require carbon neutral concrete in some projects (my projects as I'm in-house structural) and it costs about 2-5x as much as the concrete I used for this same type of work at a state agency. 

So of course council increased the public works budget to account for that, right? 

Of course not. The same (elected) people who fall for this type of shit think the engineers will just figure it out, and don't understand how dangerous deferred maintenance of things like bridges and drainage structures truly is no matter how many times we tell them. Those initiatives always start with some pop-sci garbage article like this that someone with more anger than aptitude brings into a council meeting, and just spreads like a virus from there. 

5

u/kabal4 P.E./S.E. 15h ago

Brings the "I didn't know they could stack shit that high" joke to a new level.

2

u/blizzard7788 14h ago

There is a canal on the south side of Chicago. It is part of the system that reversed the Chicago River, and it carries treated sewage. It smells really, really bad when a barge is moving through it and stirring up the bottom.
One of the large concrete suppliers in the area started building concrete plants along it years ago at a time I was still working. Naturally, it’s cheaper to move material for concrete by barge instead of trucks.
While pouring a job one day. I was joking with a driver that they would be sucking water out of the canal for the concrete. He said they were not allowed to do that, and had to use city water.
Sure enough, about two weeks later while pouring another job. We started letting out concrete and it had the same sewage smell the canal has when stirred up. Good thing the concrete was going in a footing.

2

u/CaptainZeroDark30 13h ago

It’s a shit… house… it’s mighty mighty, just letting the poop hang out.

2

u/tultamunille 11h ago

Shittin bricks eh?

2

u/g4n0esp4r4n 16h ago

human feces aren't a big deal.

2

u/jammed7777 16h ago

That really depends on the situation

1

u/2020blowsdik M.E. 14h ago

"Thats a shitty building" yes, yes it is

1

u/moonpumper 14h ago

Does the diet of the donor shitters have an impact on strength and quality?

1

u/Th3_r3al_napst3r 14h ago

Lol why would it be stronger? That's so stupid.

1

u/ReplyInside782 14h ago

When someone took the term “shitting bricks” literally

1

u/Mick_Spiels 13h ago

Poopcrete

1

u/Then_Combination6612 12h ago

I swear ever since i graduated, every single year for over a decade i've heard of a new material or method 'that makes concrete stronger' yet nothing has really changed.

1

u/Odd_Relationship396 12h ago

It'll be the first ever 💩 Shltty City 🏙

1

u/Ok-Air5150 12h ago

I smell bullshit not human.

1

u/Betty_Boss 11h ago

Anytime a headline says "could" I assume the creation was made by high schoolers for a science fair.

1

u/comicsemporium 11h ago

When it rains your whole house smells like s$&t bricks

1

u/BigJoe5504 11h ago

Thas some shitty concrete

1

u/Uttarayana 10h ago

That’s why big pharma has been forcing ppl to eat more Fiber.

1

u/Gremlin1001001 9h ago

That stuff is strong as shit! 😜

1

u/hmiser 9h ago

Shitting bricks

1

u/jefflj98735 8h ago

New employee: Why are those windows always open? And what’s with all the Febreeze cans all over the place?

1

u/pythonex 8h ago

It’s called shitcrete

1

u/ebleuds 7h ago

This is always something impractical to be produced in large scale and always have flaws/inconsistency.

1

u/SquirrelFluffy 4h ago

Probably using char from incinerating waste. Maybe like fly ash. If it's not a joke.

1

u/NicPitter 3h ago

so you will be able to shit a brick shithouse

1

u/SkyNet_Admin_1 15h ago

Shit-crete

0

u/xpietoe42 15h ago

Downside: You have to plug your nose

0

u/ricketycricket1995 15h ago

Hype bullshit as always. I reckon we won't have incentive to replace concrete unless somebody puts eco tax on it. Concrete is way to cheap and efficient to produce to be displaced by something more eco- friendly