We Made A Concrete Slinky

We made stretchy concrete by cutting it into a spiral with our 60,000 PSI waterjet
🔪🔪 waterjetknives... 🗡️🗡️
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[@Scevenex]

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.

[@dattebenforcer]

How could they make it flexible?

[@mikeznel6048]

@@dattebenforcer Glass fiber reinforcement.

[@DARKredDOLLAR]

@@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.

[@bundles1978]

@@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.

[@mikeznel6048]

@@DARKredDOLLAR Definitely agree with the poly.

[@sicroto]

Welp, this was hard to watch, but has some stone solid facts.

[@somethingsomething9198]

I thought it rocked

[@sicroto]

@@somethingsomething9198 a real concreate episode.

[@CharlesCalvinTheUndying]

@@sicroto Do you have any solid evidence of that fact?

[@budgetbiker26]

@@CharlesCalvinTheUndying I feal like you would have to be hard pressed to find this episode not to be rock solid.

[@budgetbiker26]

@@groverbundy899 damn, can't take a good joke for granite, it must have been a real rocker.

[@JonTheMiniBeastHadden]

You guys definitely needed to use fiber reinforced concrete for this project. It always surprises me how few people know about that stuff.

[@5.43v]

They should redo the video with it

[@chriss1914]

They should also let it fully cure.

[@SchMasHed]

Also use mortor mix

[@pauleatshotdogs]

no, they need to keep their day jobs and stop flooding the world with stupidity in the form of "content"

[@John_Fman]

If they did the fibre would have to be in the same shape of the spiral otherwise it wont be effective

[@Vault57]

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".

[@umcara3784]

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.

[@Fluffytehcat]

this feels like myth busters when they got new people.. not even a lick test

[@MetalY2KMusic]

@I'm Just Kyle They have a Car (and motors etc) channel now! They've had it, actually. But that's where they are

[@ritishify]

This thread isn't awkward at all

[@jeronimomurruni]

@@MetalY2KMusic Can you tell us the channel please?

[@justinhamilton2993]

@@jeronimomurruni it’s called “cars and stuff”

[@undercoverantics4002]

@@jeronimomurruni no

[@ryanwilliams2300]

This man flexing on us with his biceps at ~6:30. 💪

[@Awesomeness-iz3dh]

I love getting to experience watching the dust come off of concrete without also experiencing concrete dust inside my lungs.

[@tracybowling1156]

I love when you guys try stuff. It's fun to see what happens.

[@ledocteur7701]

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.

[@GENEXERHEXO]

They are on a new channel called Cars and Stuff

[@griffinmckenzie7203]

@@GENEXERHEXO what part of "official statement" did you have trouble understanding?

[@benfbuilder]

Agreed, I'm done with this channel now that dan and Mitchell disappeared with no explanation whatsoever

[@GENEXERHEXO]

@@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.

[@griffinmckenzie7203]

@@GENEXERHEXO so, you're pointing me towards something that isn't there anymore? The fuck kind of response is this?

[@codygrimm8791]

Concrete is made to work under compression. By doing this you put the whole thing under tension and torsion. Glad you learned something today

[@tammyhollandaise]

Have you considered trying spirals of random objects? I think a door would be fun.

[@joma77]

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.

[@shinji391]

Have you not seen the video? That's exactly what they're doing. Making spirals. Slinky are cylinders.

[@tammyhollandaise]

@@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.

[@jinruich]

That's sounds like one way to start a junji ito book

[@noobynoober887]

5:13 : a typical Minecraft villager

[@Nub-lols]

They just made flexible concrete and broke the laws of physics

[@mtboy33]

Lol. The part at 6:20. If you look up ECC, or flexible concrete, it was made nearly 15 years ago

[@5.43v]

ECC + Fiber

[@silaslithian5298]

If you want to rubberize it, add a water-based latex to the mix and let it cure.

[@A_very_tinly_can]

0:18 - 0:23 the goblin noises absolutely made my day

[@Wogsmawp]

You truly learn something new every day I didn’t know concrete and cement were different things

[@MrKingbank01]

around 4:45 I started to hear perfect beginnings to many that's what she said opportunities

[@Magical_Trash]

6:32 everyone: watching him flex concrete Me: watching him flex 💪👀

[@XVII_XIIX]

“ it’s almost like there’s metal mesh a quarter edge from the surface” 😂😂 idk why but they got me

[@insolentW]

dude my dad and I were literally debating the difference between concrete and cement today and then I got recommended this video

[@Rekkuza-eu6sp]

Pick up your cross and follow Jesus! The world is quickly headed for destruction, and sooner or later you will have to sit at the judgement seat and give an account for your actions. Belief in messiah alone is not enough to grant you salvation - Matthew 7:21-23, John 3:3, John 3:36 (ESV is the best translation for John 3:36). Call on the name of Jesus and pray for Him to intervene in your life! - Revelation 3:20. 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. Can't get a response from God? Fasting can help increase your perception and prayer can help initiate events. God will ignore you if your prayer does not align with His purpose (James 4:3) or if you are approaching Him when "unclean" (Isaiah 1:15, Isaiah 59:2, Micah 3:4). Stop eating food sacrificed to idols (McDonald's, Wendy's etc) stop glorifying yourself on social media or making other images of yourself (Second Commandment), stop gossiping about other people, stop watching obscene content etc and you should get a response. Have a blessed day!

[@ColdWarAviator]

+1000 points for working a Monty Python Holy Grail clip into a video about concrete elasticity. Excellent work!

[@IneptOrange]

"Reciprocating saw? I hardly know her." Fucking lmao

[@paulosborne6517]

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???!!!

[@komikbookgeek]

"Are your quarts different then my quarts?" I WANT TO KNOW THIS TOO

[@mstringham]

6:38, i don’t see spirals, all I see are guns

[@NikosChickenBurger]

I ready the title as “we made concrete stinky” I just realised they weren’t making concrete stinky

[@mxvortex2341]

He said “oooh” more times than I could count lol

[@iamheful]

Let's start off by defining what a slinky is...

[@vicrattlehead1243]

what happened to the two original guys on this channel?

[@ledocteur7701]

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.

[@vicrattlehead1243]

@@ledocteur7701 100 times? wow man my apologies for not being glued to youtube all day long

[@MattIsTheCat]

​@@ledocteur7701How wrong you were. They never even worked there.

[@Manelneedsaname]

I are them

[@tingaling77]

What a concrete video

[@sv352]

So technically this is not the same channel I was watching before

[@barrymccockiner6641]

I've never heard anyone else say "kitty-cat footing", or "don't be a kittycat". Well done

[@owololcat]

1:46 these guys had no business making me laugh with just one word.

[@eddedward2766]

Try fibre reinforcing and leave it longer, Concrete is at 90% of full strength in 30 days.

[@thepenguin9]

Holy shit you guys are still kicking about

[@tomsmith6416]

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 🤷‍♂️

[@loganmurphy1505]

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.

[@thewrongsorcerer]

Read it as "We made concrete stinky"

[@bluefoxgalaxy6057]

I love how their first plan was to take a chunk of concrete from the sidewalk 😂

[@tarmy3619]

Well, this is another vid I'm gonna get stoned to

[@mauromendietaanzurez]

Walterjet channel: it can be possible. Raidolitos: amateurs.

[@jacobdavies9974]

You could make it again but next time add in concrete fibers it will help it to stop cracking potential

[@natalieisagirlnow]

you mean fibers to concrete? concrete fibers are rocks

[@dattebenforcer]

They should add rubber or latex to it to make it more springy.

[@mikeznel6048]

Glass fiber reinforcement.

[@yaroslavpanych2067]

Do they realize avarage concrete cure time is about a month until it achieves nominal strength.

[@jonaa4420]

This is exactly what I was thinking.

[@ledocteur7701]

I don't think they did realize that. and they definitely should have after seeing how brittle the first test was.

[@WaterjetChannel]

We let it cure for a week 😩

[@Scevenex]

@@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.

[@Scevenex]

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.

[@krishnanair6922]

This deserves more views

[@VonSchtauffe]

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

[@userequaltoNull]

Hell, I could tell you that.

[@ILoveTinfoilHats]

@@userequaltoNull pretty sure a 4 year old could figure that out minus the terminology

[@spliffsforbreakfast]

this was an unexpected yet enjoyable detour in my algorithm

[@M00NG00N]

I enjoyed this thoroughly.

[@naniruja3407]

As a civil engineer, this was hard to watch🥲

[@thesciencesphere4273]

20 seconds in and it already made me laugh Springy concrete let's go!

[@skrrtskrrt646]

Being somwhat round and somewhat rock, it's perfect for Rock and Roll.

[@Celticfusionvibes]

New title: We made a concrete hairspring

[@grimus8266]

Ya know, I was unaware that concrete could be that flexible

[@bazdris8132]

This confused me soo much but I had to watch it, I don't regret watching

[@Doodenx]

love the sound effects

[@deadgiveaway-z3i]

''On this episode of will it stick?'' *lobs a chunk of concrete at the wall*

[@stevejose2969]

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.

[@Cammi_Rosalie]

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.

[@jinxtrap]

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!

[@keyofdoornarutorscat]

Yeah I noticed this too all the sounds are easy to hear and crispy

[@greyklein4154]

I was going to tell a joke, but I can’t come up with anything concrete enough to share.

[@lovinglife8966]

“Not on that wall” *Proceeds to throw it* 2:00

[@thefinalkayakboss]

Fault zone Engineers battling earthquakes for hundreds of years: "first time?"

[@TheTranceCartel]

This is the sort of youtube video to just randomly have millions of views

[@junkdriver42]

Got a thumbs up for the “very small rocks” clip

[@homelesshelpforjax]

What happened to the ogs of the channel

[@masteroflight7296]

Idk why they refuse to tell us despite everyone complaining in every video, they are just killing the channel

[@DanVR001]

KZbin burnout, I think.

[@ledocteur7701]

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.

[@samhouston1288]

@@ledocteur7701 Where did you hear that?

[@sriramapriyan138]

Concrete cannot handle tension but it can do well in compression 🙂

[@idimoni7950]

Here's a tip Make the slab thinner Make the spiral itself thicker

[@Tiniuc]

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!)

[@SeigeGoat]

"I like this so far" -The Rock

[@guillermorosario4578]

Your Canadian is showing heyyyyy!

[@JTowers97]

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.

[@Conklin03]

"con crete tiame" "èh" is a revolutionary exchange.

[@k9builder]

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.

[@foxart1387]

that's a big mosquito repellent

[@atakiri]

I can't even begin to say why, but the way the concrete chunk SMACKED into the far wall made me lose it--twice

[@GRosa250]

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.

[@younghussla3032]

We need Mitchel and Dan to come back too! Good vid doe

[@Nomad-Oni_Airsoft]

The fact that he very slightly lifted up the concrete in his driveway scares me

[@slayeryt637]

"We made a wire slinky with some concrete on it"

[@HunterSentinel]

“How to basic” but with concrete.... truly destructive.

[@MLGPRO-sm8jy]

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

[@faervas1234]

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.

[@creativehy552]

"We Made A Concrete Slinky" "Why"

[@IsolatedMind]

We want the old waterjet channel back. Who tf are these guys?!

[@Calupp]

10,000 years from now, after our apocalypse, new humans will find this and wonder how on earth we built this spiraled rock with such primitive tools.

[@TimJSwan]

This makes me want to laser carve a 3D Hilbert curve from a massive chunk of bedrock.

[@BentusiProgenitors]

I miss Mitchell

[@johnjamesoneill7867]

I was gonna make a scientific statement but I couldn’t think of some concrete evidence.

[@reddead745]

Day 1 of asking for them to make the World's Best Skipping Rock

[@reydelosmuertos1944]

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

[@alpiner9638]

🇨🇦 eh ,,,, I love hearing someone on line say the Canadian eh ,,much respect from Ontario Canada 🇨🇦

[@MadSnizzik]

You straight up made your own trowel that’s awesome

[@ゆうるい-林昱睿]

“my money dont jiggle jiggle”

[@aga3708]

im very surprised this is so entertaining

[@Geeksmithing]

Anyone else read the title as "We made A Concrete Stinky?"

[@FreyjaThAwesome1]

It’s 4am, I shouldn’t be watching this

[@yohanahramen6756]

I just turned my brain off as these dudes tried to make a rock slinky

[@masteroflight7296]

Another day another video without any explanation as to what happened to this channel.

[@ledocteur7701]

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.

[@masteroflight7296]

@@ledocteur7701 if it’s been said 100 times then where? Because I can’t find a single statement anywhere.

[@ledocteur7701]

@@masteroflight7296 well, now you know.

[@AZEOforreal]

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.

[@Xorealosu]

Not me reading the title as "We make concrete stinky"💀

[@richardgroom988]

The whole problem was Mitch wasn't there to taste test it