We Made A Concrete Slinky
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- เผยแพร่เมื่อ 16 ก.ย. 2024
- We made stretchy concrete by cutting it into a spiral with our 60,000 PSI waterjet
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I work in a construction materials lab. Most concrete is probably up to 70 to 80 percent of its maximum strength after a week. The problem wasn't the cure time, it's that concrete is extremely weak in tension. That's why rebar gets added to it. What they did with the metal mesh was reinforcing it so that even though it still broke the mesh held it together. Rebar keeps it from flexing, mesh holds it together.
A lot of concrete will be strong enough after 2-3 hours for people to walk on it, and after a day light traffic. By a week it will have reached a majority of the way towards its peak strength, sometimes even exceeding its rated strength by that time. The issue is that concrete has very little strength in tension (flexure) and so them trying to make it "springy" by cutting it into a spiral is not going to work regardless because it doesn't have much resistance to that type of stress.
A month (28 days) is the time at which concrete is supposed to have reached its rated strength. It's not weak before that though, and construction is often continued atop recently poured concrete after a few days and some early test breaks have been performed to confirm it is up to enough strength. Roadways usually open up after 2-3 days from being poured.
How could they make it flexible?
@@dattebenforcer Glass fiber reinforcement.
@@mikeznel6048 either glass fiber, or better in this case polymer fiber.
It gets mixed into the cement instead of gravel and is scattered to help combat tensile forces in all directions.
@@DARKredDOLLAR Euclid Fiberstrand. Would also use some HRWR and set retarding additive to boost the strength. also if you cure it in water for 28 days like a test cylinder you may get better results.
@@DARKredDOLLAR Definitely agree with the poly.
Welp, this was hard to watch, but has some stone solid facts.
I thought it rocked
@@somethingsomething9198 a real concreate episode.
@@sicroto Do you have any solid evidence of that fact?
@@CharlesCalvinTheUndying I feal like you would have to be hard pressed to find this episode not to be rock solid.
@@groverbundy899 damn, can't take a good joke for granite, it must have been a real rocker.
You guys definitely needed to use fiber reinforced concrete for this project. It always surprises me how few people know about that stuff.
They should redo the video with it
They should also let it fully cure.
Also use mortor mix
no, they need to keep their day jobs and stop flooding the world with stupidity in the form of "content"
If they did the fibre would have to be in the same shape of the spiral otherwise it wont be effective
2:45 Back in the day asbestos fiber was added to cement to improve tensile strength in concrete where needed. I don't advise using asbestos, but you can use chopped glass or polymer fiber. I understand that's what they add to the cement now for greater tensile strength. Also consider using the admixture of acrylic latex (?) they use in mortar for tile floors and such. Cheap version is to use white "school glue".
You guys could try using fiber materials instead of rocks. The way it works is that the fibers will link eachother through the concrete making a "fabric" inside it. Even when the concrete cracks, the fibers from each side will hold the structure togheter.
you really need to make an official statement about Dan and Mitch, otherwise the comments complaining about there departure won't stop.
I like your style of videos just as much as the old style with Dan and Mitch, but you need to put some effort in community management to smoothen the transition.
They are on a new channel called Cars and Stuff
@@GENEXERHEXO what part of "official statement" did you have trouble understanding?
Agreed, I'm done with this channel now that dan and Mitchell disappeared with no explanation whatsoever
@@griffinmckenzie7203 didn’t have trouble understanding it all. In one of the recent vids they had a pinned comment saying something under the lines of “ what Dan and Mitchell have been up to “ with a link to their new channel, however that’s been removed for some reason. that’s the closest to an “official” statement we’re gonna get.
@@GENEXERHEXO so, you're pointing me towards something that isn't there anymore? The fuck kind of response is this?
this feels like myth busters when they got new people.. not even a lick test
@I'm Just Kyle They have a Car (and motors etc) channel now! They've had it, actually. But that's where they are
This thread isn't awkward at all
@@metalface8515 Can you tell us the channel please?
@@jeronimomurruni it’s called “cars and stuff”
@@jeronimomurruni no
I love when you guys try stuff. It's fun to see what happens.
This man flexing on us with his biceps at ~6:30. 💪
Concrete is made to work under compression. By doing this you put the whole thing under tension and torsion. Glad you learned something today
Have you considered trying spirals of random objects? I think a door would be fun.
Though a wooden door spiral wouldn't be any different from a plain old wood spiral, I'd also like to see them use more materials.
Have you not seen the video? That's exactly what they're doing. Making spirals. Slinky are cylinders.
@@shinji391 yeah, but so far they've tried sheets of material. I'm envisioning a stolen door from the office that's returned with extra slink.
That's sounds like one way to start a junji ito book
what happened to the two original guys on this channel?
they got promoted and passed on the channel to coworkers, it has been said at least a 100 times by now.
Dan an Mitch might still participate in a few videos but they don't run the channel anymore.
@@ledocteur7701 100 times? wow man my apologies for not being glued to youtube all day long
@@ledocteur7701How wrong you were. They never even worked there.
I love getting to experience watching the dust come off of concrete without also experiencing concrete dust inside my lungs.
"Reciprocating saw? I hardly know her."
Fucking lmao
You truly learn something new every day I didn’t know concrete and cement were different things
What happened to the ogs of the channel
Idk why they refuse to tell us despite everyone complaining in every video, they are just killing the channel
TH-cam burnout, I think.
they got promoted and passed on the channel to coworkers, it has been said at least a 100 times by now.
Dan an Mitch might still participate in a few videos but they don't run the channel anymore.
@@ledocteur7701 Where did you hear that?
Another day another video without any explanation as to what happened to this channel.
they got promoted and passed on the channel to coworkers, it has been said at least a 100 times by now.
Dan an Mitch might still participate in a few videos but they don't run the channel anymore.
@@ledocteur7701 if it’s been said 100 times then where? Because I can’t find a single statement anywhere.
@@masteroflight7296 well, now you know.
Lol. The part at 6:20. If you look up ECC, or flexible concrete, it was made nearly 15 years ago
ECC + Fiber
Try fibre reinforcing and leave it longer, Concrete is at 90% of full strength in 30 days.
They just made flexible concrete and broke the laws of physics
What a concrete video
6:38, i don’t see spirals, all I see are guns
Any civil engineering student will tell you that concrete is great under compression but terrible under tension. Trying to make a slinky with so much internal tension is... Not a good idea
Hell, I could tell you that.
@@userequaltoNull pretty sure a 4 year old could figure that out minus the terminology
Comedy Gold there Neil... "Reciprocating Saw..?!! I hardly know her..." Brrrrm-tsssh!!! Hey, maybe you should jet some drums and cymbals in half. I'll bet the cymbals will make a hell of a noise as they are being cut. Maybe even a SPIRAL CYMBAL???!!!
You could make it again but next time add in concrete fibers it will help it to stop cracking potential
you mean fibers to concrete? concrete fibers are rocks
They should add rubber or latex to it to make it more springy.
Glass fiber reinforcement.
I work for Quickrete and you could have just gotten Sand Mix and you wouldnt have had to sift the gravel out. And like someone else said, it didn't cure long enough probably.
0:18 - 0:23 the goblin noises absolutely made my day
Do they realize avarage concrete cure time is about a month until it achieves nominal strength.
This is exactly what I was thinking.
I don't think they did realize that. and they definitely should have after seeing how brittle the first test was.
We let it cure for a week 😩
@@WaterjetChannel I work in a construction materials lab. Most concrete is probably up to 70 to 80 percent of its maximum strength after a week. The problem wasn't the cure time, it's that concrete is extremely weak in tension. That's why rebar gets added to it. What you did with the metal mesh was reinforcing it so that even though it still broke the mesh held it together. Rebar keeps it from flexing, mesh holds it together.
Not really true. Concrete will be strong enough after 2-3 hours for people to walk on it, and after a day light traffic. By a week it will have reached a majority of the way towards its peak strength, sometimes even exceeding its rated strength by that time. The issue is that concrete has very little strength in tension (flexure) and so them trying to make it "springy" by cutting it into a spiral is not going to work regardless because it doesn't have much resistance to that type of stress.
A month (28 days) is the time at which concrete is supposed to have reached its rated strength. It's not weak before that though, and construction is often continued atop recently poured concrete after a few days and some early test breaks have been performed to confirm it is up to enough strength. Roadways usually open up after 2-3 days from being poured.
I think you should try putting an inflatable semi spherical balloon underneath the concrete spiral, so that it can push the concrete at a uniform rate. if it works it could have massive applications is modular habitat design as you are essentially developing a 3d structure from a 2D structure.
There have been small buildings made by pouring concrete over an inflatable bladder, then inflating the bladder. After the concrete sets, the bladder is removed leaving the solid structure. How they keep the wet concrete from just sliding off the bladder though, is something I don't know.
Try looking up "Inflatable concrete building" or something to that effect.
I ready the title as “we made concrete stinky” I just realised they weren’t making concrete stinky
"Are your quarts different then my quarts?"
I WANT TO KNOW THIS TOO
dude my dad and I were literally debating the difference between concrete and cement today and then I got recommended this video
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Contemplate how the Roman Empire fulfilled the role of the beast from the sea in Revelation 13. Revelation 17 confirms that it is in fact Rome. From this we can conclude that A) Jesus is the Son of God and can predict the future or make it happen, B) The world leaders/nations/governments etc have been conspiring together for the last 3000+ years going back to Babylon and before, C) History as we know it is fake. You don't really need to speculate once you start a relationship with God tho.
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Since there are so many different kinds of concrete, I'd like to see this repeated with mixtures with very different sump properties, and Roman/Volcanic concrete (with pig's blood!)
+1000 points for working a Monty Python Holy Grail clip into a video about concrete elasticity. Excellent work!
If you want to rubberize it, add a water-based latex to the mix and let it cure.
Concrete cannot handle tension but it can do well in compression 🙂
Holy shit you guys are still kicking about
6:32 everyone: watching him flex concrete
Me: watching him flex 💪👀
He said “oooh” more times than I could count lol
Maybe try adding the fiber mesh and letting it cure longer. Also, keep it moist while it’s curing. No one likes it to be dry when they’re working it.
“ it’s almost like there’s metal mesh a quarter edge from the surface” 😂😂 idk why but they got me
Imagine if we could make flexible sidewalks and roadways, there would be less need to repair them because they wouldn’t crack under the stress of weight
It is not weight that is the problem. It is the expansion and contraction from heat from the sun. It's why they put expansion cracks in the side walks.
This reminds me of that flexible rock.... That would be an awesome idea to use that as a core for an epoxy bowl. 😁
Honestly man, that mini spiral you made @4:30 would make a cool drain hole cover in a shower if you could sink it flush with the tiles 🤷♂️
love the sound effects
I'm not an expert on anything but I feel like the sound mixing is really good so if I'm not just dumb good work sound-responsible person it's a cool video and that's what I noticed about it first!
Yeah I noticed this too all the sounds are easy to hear and crispy
Waterjet channel successfully redefines the word slinky.
Walterjet channel: it can be possible.
Raidolitos: amateurs.
You should use QuicKrete. It’s more condensed and has a less granular state. There’s less pebbles and all. Should make it much more flexible.
Your Canadian is showing heyyyyy!
As a civil engineer, this was hard to watch🥲
this was an unexpected yet enjoyable detour in my algorithm
I enjoyed this thoroughly.
I have a theory that the slinky would be stronger if the cut was made from the outside in instead of the inside out. The force of the waterjet isn't focused as much when it first starts and you can see at the beginning it caused a surface level crack in the concrete. Doing the spiral from the outside in may help with the strength of the middle section.
This deserves more views
Fault zone Engineers battling earthquakes for hundreds of years: "first time?"
20 seconds in and it already made me laugh
Springy concrete let's go!
"I have no idea what amount of concrete this is" doood, it's exactly the same amount of concrete it was before you removed the rocks. the rocks don't absorb water. the water is for the mix which you still have. It's like a jug of instant pancakes that you just add water to. just because you added blueberries or chocolate chips doesn't mean you need more water.
This confused me soo much but I had to watch it, I don't regret watching
1:46 these guys had no business making me laugh with just one word.
🇨🇦 eh ,,,, I love hearing someone on line say the Canadian eh ,,much respect from Ontario Canada 🇨🇦
''On this episode of will it stick?'' *lobs a chunk of concrete at the wall*
Reciprocating saw? I barely know her!
I'm saving that for when dad comes back with milk
Got a thumbs up for the “very small rocks” clip
I was going to tell a joke, but I can’t come up with anything concrete enough to share.
Add fibres to the contrete, it will prevent small cracks and add tensile strength
“Not on that wall”
*Proceeds to throw it*
2:00
I've never heard anyone else say "kitty-cat footing", or "don't be a kittycat". Well done
Here's a tip
Make the slab thinner
Make the spiral itself thicker
This could be such a cool way to make a sculpture.
"I like this so far"
-The Rock
"Make a cake simulator!"
Step 1: Buy "baking" mix.
Step 2: Just add water!
Step 3: Pour into baking pan
Step 4: Leave it out for a day
Step 5: Enjoy!
🍰
"con crete tiame"
"èh"
is a revolutionary exchange.
Your Humor reminds me of how to Basic but its more Solid like concrete
"are your quarts bigger than my quarts?"
Oh, a tale as old as time.
"This is one cup"
>Adds a double-cupped handful
Me, who cooked for ten years: ... I don't... What kind of cup???
Seriously, last week, I was making food for my dogs (don't ask, it's dumb AF and from my mom, but our last duo died at 7 and 8, so she's trying to fix everything by making feeding harder), but she repeated for the millionth time "three cups of rice, six cups of water" and what pot to use. I followed directions until I realized something. After adding the six cups of water, the pot had less than an inch to the top without even adding the rice. From experience, I knew something was fucky, but I followed directions from mom regardless because fuck having to deal with her being upset, I'd rather just do something stupid, and, wouldn't you know it, the shit boiled over. And then again a few weeks later. And again a week later.
So I asked my mom, "what do you do?" cause she doesn't boil over, and I watch a woman nearing 60, scoop three DRY CUPS of rice into the pot, and then sox DRY CUPS OF WATER into the pot.
In all her years, my mom literally never understood the difference between a solid and a liquid cup. AND SHE'S A DECENT COOK! There's a few things she can't do justice, like grilled cheese or eggs, but she cooks basically every night and she still can't get them right after 35 years with my dad making all the other things she can't get right.
And then, when you're 20 fucking 6 and you can feel every passing day as you age, you THEN find out your mom doesn't know the difference between ounces and fluid ounces. If life was D&D, I just took permanent intelligence damage when I learned that shit.
Like, I learned that shit before I learned how to actually work a job! How could a person go so long without realizing the mistake?! But because she's my mom, I can't say any of this to her because, like I said, she's not a bad cook, she knows the best way to prepare just about anything our family eats, but SOMEHOW she still didn't know the difference. I am still mentally reconciling this point.
You'll get a cleaner cut and possibly less fracture points if you use a sacrificial layer above the concrete. I noticed a fair bit of swathing on your cuts (typical with non-linear cuts) and that will cause micro-fractures, slower speed and sacrificial layering might help.
So, just FYI, the cement clearly has untouched bubbles which increase how porous the cement is, and there's literally even basic workarounds. Firstly, they make tools for this exact purpose, working air out of cement/concrete. Secondly, you treat the liquid mix like a pan of brownies and you drop that shit onto a flat surface a million times to shake and force the glass bubbles to come to the surface, making the inside more uniform.
Let's start off by defining what a slinky is...
Fun fact shaking a cocktail lowered the alcohol content a little so James Bond has them shaken not stirred so that way he doesn’t get drunk while on missions
If you pour the concrete/cement into the frame and then cover it with a plastic sheet or film and leave it for a week you'll get a much better result
This! It's still curing for 30 days roughly.
+ECC + Fiber
This is the sort of youtube video to just randomly have millions of views
around 4:45 I started to hear perfect beginnings to many that's what she said opportunities
I love how their first plan was to take a chunk of concrete from the sidewalk 😂
Wife: I bet hes out cheating
Him in the shop: wow this slinky out of concrete is awesome
You guys are great and I still enjoy the videos, don't get me wrong, but please let the community know where Dan and Mitchel went. If you guys cannot be transparent about something like that then how are we supposed to move on?
I wouldn't worry about it, it's not their responsibility to inform the viewer, you're just being nosey. Just enjoy the content or don't watch it.
And you say "move on" as if you have an emotional connection to someone you don't even know.
@@popeyboy5108 I meant move on watching their content without wondering, and I do think they have the social responsibility to address it since viewers are what defines a channel's growth, they don't have to get super specific if it is personal however.
New title:
We made a concrete hairspring
You guys really are the first to create concrete slinky. I bet with a little more material research, you could get it to no break at all.
You should do this using flexible concrete, created by using fiber reinforcement, fine sand aggregate, and a superplasticizer.
I'm not a scientist, but worked in masonry for many years. I would have started with a fiber reinforced mortar, and added some polymeric adhesive (made for mortar), along with a fine mesh. Also, I would let it cure for a few days.
It probably would last long enough to play with for a few minutes before crumbling.
I scrolled down after typing this, and am surprised to see so many other comments mentioning fiber reinforcement. You fellas aren't as ignorant as you look. 😅 ..jk
Well, this is another vid I'm gonna get stoned to
that's a big mosquito repellent
Ya know, I was unaware that concrete could be that flexible
Add some cotton, polyfill, or steel scrubber brush stuff in there.
Detroit and New Jersey always catching strays, lmao.
MAN THIS CRACKED ME UP :)
"We Made A Concrete Slinky"
"Why"
5:13 : a typical Minecraft villager
I bet shredded Fiberglas would make a huge difference.
Yeessss, I need this in my life
6:40 ooo Look at those arms lol😎
hahaha