The Beauty of Reinforced Concrete!

Steel reinforced concrete is a crucial component in construction technolgy. Let's explore the physics behind the reinforced concrete in detail. Please don't forget to support my channel at Patreon - / sabins

[@SabinCivil]

I hope you enjoyed the conceptual video on reinforced concrete. If you learned something new from our channel, please consider giving back. Your support on Patreon is essential for the survival of my channel - www.patreon.com/sabins , Thanks Sabin Mathew

[@Duke_Of_Havoc]

Happy New Year Sabin in advance.

[@PabloDamon]

I watch your channel and wonder about the911 splaining you did . patreon??? really???

[@hypeboy306]

​@@PabloDamon this youtube channel location is in india and the earning through youtube views is very less, as compared to the earning in USA or WEST

[@bartroberts1514]

A deep dive into geopolymer and basalt fiber rebar, closer matches in elasticity than OPC and steel, would be nice to see. Also, overcomes corrosion issues, cures many times faster, is more earthquake resistant, more chemically resistant, can be made lighter and stronger.. and 70% cheaper for raw materials.

[@Innerbrave]

@SabinCivil -- my sincere comment, please consider returning naming and narration, scripting, storyboarding etc. to the very original designs, or your most popular videos. The renaming and redesign is not wanted by most of your viewers, why did you do the rename and changes? Please consider reverting the changes, signed your viewers and a longtime fan.

[@jamesrasmussen9281]

Using the jack as a press is such an elegant solution. I love simple, effective engineering.

[@alejandroperez5368]

It's all but elegant.

[@SabinCivil]

I am glad that you loved our simple techniques.

[@numankuzmusic]

This is a super video that every Civi Engineering Lecturer should watch with students in class to get a better perspective to design and imagine before what they will work on.. Thank you man !

[@toddteroni8296]

Thanks Bhai . Superb work

[@ericwelsh4853]

Also, it's worth noting that concrete and steel have very similar coefficients of thermal expansion. That's what makes steel reinforced concrete possible.

[@Ni7ram]

i assume this is by design? i mean, different concrete mixes would have different coefficients, and we choose the mix that most equals the metal ones?

[@ericwelsh4853]

@@Ni7ram The important word is: Similar

[@Ni7ram]

@@ericwelsh4853 sure, but that doesnt respond my question. im interested in if there are different concrete possibilities and we use the most compatible with steel, or if thats just pure coincidence

[@ericwelsh4853]

@@Ni7ram There are different grades of concrete, but they all have the same thermal expansion characteristics.

[@Ni7ram]

@@ericwelsh4853 thank you very much!

[@muhammadraahil5172]

I have no clue why I clicked on this, but I watched until the end

[@ChocoLater1]

You are a man with male brain cells. You just passed the test of 21st century

[@daffquess7006]

I clicked it cause the reinforced concrete is bisexual and that's funny

[@BOOMC4]

Same

[@Mentaculus42]

When I was in engineering school the class went to a company that made prestressed concrete I-Beams. It was fun to jump up and down on the top of a 100 ft I-Beam and get it into “resonance”. It is amazing how flexible they are.

[@hisvin]

In my school, we built one and we detroyed it. It's more fun.

[@iamnormal8648]

​​@@hisvin In my school we make them and sell them. Much more fun.

[@mr.shannon6137]

The best visual I have seen regarding the principles of pretensioned concrete.

[@blazerorb]

Hi Professor, I’ve been watching your content since the early Learn Engineering days. Concrete being weak in tension is a topic that is covered frequently already. A couple things I think you could add that would make your video go beyond than the rest and really be enlightening would be: 1) Compare a reinforced concrete beam’s load capacity to that of just the rebar, (and/or unreinforced concrete plus bare rebar) 2) visualize in a column that rebar stirrups and main bars resist against the induced principal shear and/or effective radial tension. (You could show the different common failure modes for unreinforced standard concrete cylinder samples; how they usually fail on a single shear plane or sometimes conical surfaces.) 3) Bonus #3 would be how concrete isn’t really as good as steel in terms of physical parameters, but in the practical world it complements steel by being much cheaper by volume and weight, and leas dense, which allows you to use much larger cross sections (and larger dimensions benefits beams and long columns exponentially); the concrete protects the rebar from Corrosion, concrete holds the steel in place and somewhat combines them into a single body (compared to how before the concrete the rebar was just tied together with wires); the concrete can be installed as complicated geometry in large volumes economically because it’s a liquid* you pour into forms and around rebar (compared to having to fabricate, transport, and erect an equivalent structure or floor area out of steel, pumps are very practical)

[@Turdfergusen382]

Don’t expect him to. He does everything half ass. And isn’t really that smart. He wants us to believe building 7 came down from fires and rust. He’s a joke. And a shill for the US govt.

[@brianwelch1579]

You could also mention that there are materials other than steel which are also very good in concrete like basalt rebar but don't corrode and destroy the structure.

[@CodeOptimism]

I've seen multiple videos on concrete in compression/tension and this is the first that explained it extremely well. Most talk about the concepts but don't really show the relevance of the placement of the rebar (other than showing it's "in there"). Nor do they have an excellent simplified example like yours with the reinforcement clearly on the bottom in a simple case with gravity... with a follow-up showing a building and how the tensile forces can actually be at the top, etc. I thought this was excellent.

[@sumitkumar-001]

Hmm....

[@nabedesu7708]

Im a civil engineering student and came across your video randomly and id say watching here actually helps me a lot in understanding the world of civil engineering. There is less civil engineering based channel so this kind of channel is a gem to me

[@nijil.m1256]

Thanks

[@DrJQureshi]

As always, the quality of videos is absolutely amazing. As a structural engineer and lecturer myself, I don’t recommend hanging from concrete cylinder attached to the roof. This is quite risky from health and safety perspective.

[@happy__human]

Great video sir Thank you for explaining so interestingly

[@TheEdrt]

As always, beautiful content with real life example. Thank you very much, you can not even imagine how useful your video's are for students everywhere in the world. Greatings from Italy 🇮🇹

[@gnidnoeled786]

Illustration made here is INSANE. BRAVO! 👍👏

[@justgivemethetruth]

Great demonstration of tension and compression. Excellent video.

[@sher.5027]

I love how you used cars, that was smart move. I loved your teachings, keep doing such interesting examples and integrate in your 3D animations.

[@skjelm6363]

I am always super surprised by the depth of such a "simple topic" of things we see in our every day life. Thanks for putting this videos together! Mostly I love the "mad lab" parts with the dedication to take the ceiling apart, just to hang a rope to show what happens.

[@Daniralca]

Excellent video editing and content. I love how everything is explained in such a visual way.

[@mrmole6213]

Thank you for helping show us this and more. Helps me learn more.

[@danielmasgrande]

thank you so much, you are doing a very important work and very well done

[@jindagikemaaze5588]

Best video till now

[@2coolwheels139]

Great vidya! Answers a lot of my questions about reinforced concrete, thank you.

[@rosskappa5410]

Amazing vid, visuals and your test was pretty cool! ty.

[@Talestime0]

Reinforced concrete is both an art and a science! How did this innovation revolutionize modern construction and make towering skyscrapers and durable bridges possible?

[@TioDave]

There are so many properties of reinforced concrete to explore. It would be interesting to think of some scenarios. Where the concrete would fail in other fashions related to modern day techniques and jobsites. Like the form release spray that are often used on basement wall forms. What happens if that gets on the reinforcement prior to being poured. What happens if it gets on the rebar and then it rains and washes some of. What if you clean it of with soap. ect....

[@reloaderify]

Beauty of Physics!!

[@Cesar_III]

Excellent explanation.

[@mgoh1984]

Very informative. The jack handle can be pulled through the loop to turn it then pulled through again instead of taking it out each time.

[@THEGARDENILCOMPANY]

I have no idea how this video came to suggestions list and why I watched it fully. Great video though 😅

[@srivishnucharan]

Loved the Explanation with simple animation !! Thanks a lot

[@khalifyandi3053]

bro, this video came in clutch. i need to test my reinforced concrete sample 🔥🔥

[@richardwilson7685]

I am very much enjoying your videos. Looking forward to more!

[@Devendrakumar-ri4pr]

Wow, need more videos of concrete, specially for cement. Thank you

[@togodalonebeglory]

Very very informative. Thank you!

[@mitennagda]

Thanks a lot for simple and very informative videos.

[@archholder185]

Very clever use of a car and screw jack!

[@vaishnavisuravarapu5897]

Very nicely explained

[@creativitylearner3503]

Excellent as usual

[@gilbertopatino2616]

Thank you so much great video👍👏

[@me_MaruMaru2]

I've never heard of it but it's super interesting thank you for sharing.

[@ramanrathour7455]

we need a longer video on this topic.

[@AmanDattani]

Great explanation

[@jarrodheverly4783]

ACI & PCI has a lot of excellent material on the science of concrete

[@AlphatecEngineering]

Great video and explanation, love it 💚💯🔥

[@vipenderyadav1]

fab video!! loved it.

[@MaxMut.]

Teach is Love!! Like Grande Arche French Building.. Thanks so much to share your Knowledge!! We love concrete “

[@faroukch]

thank youu ♥♥and hope that i will see other mechanical / electrical structures, not just construction and happy new year 2025 ♥♥

[@joed9305]

Very nice video. And I think what I learned is that metal is awesome. :D

[@therealredforest9644]

great video

[@jampal003]

Excellent knowledge

[@fahimahmedbhuiyan2252]

Very very nice

[@navneet7075]

Great...and thanks... Please make a complete video on making flyovers girders, beam and foundation...

[@legendary9529]

Great Video

[@cmuller1441]

1:41 don't put a jack in the middle like that. RTFM! There are specific points under your car for the jack. You will damage your car if you put the jack elsewhere!

[@marc-yt4hv]

I too was wondering if he put the jack the side trim

[@stonemannerie]

It even looks dented at 2:53

[@Yadavabhishek1576]

Superb dudu your explanation is great,can you explain more about pre stress concrete

[@noname-vz5wx]

Great video!! Wishing you a great 2025

[@Bill_Woo]

What went wrong with the pedestrian bridge in Florida in 2018? That was post-tensioned concrete, and involving cables, which failed even before the bridge was open for weight loads.

[@athulkurienoommen208]

According to ChatGPT: The pedestrian bridge collapse in Florida in 2018 involved a post-tensioned concrete structure. The failure occurred due to an error in the design and construction process, particularly related to the cables (post-tensioning tendons) used to provide tension reinforcement. There were issues with the tensioning process, including inadequate reinforcement placement, which led to cracking and the eventual collapse, even before the bridge was open to pedestrian loads. This tragedy highlighted the vulnerability of post-tensioned concrete structures when proper quality checks and design validation are not rigorously followed.

[@Bill_Woo]

@@athulkurienoommen208 Well let me try again: so what went wrong? I assume they were all expert in all of the principles explained on the fine video here. What did they do wrong, and how can the public be assured that this would not happen on the next bridge built? I have heard that they did not regard visible cracks as of sufficient concern. Can that happen on the next bridge? And does this mean that a visual confirmation makes the difference whether the public is exposed to a design, rather than not, as opposed to more technologically sophisticated techniques?

[@ramajyello]

@@Bill_Woo According to ChatGPT: The pedestrian bridge collapse in Florida in 2018 involved a post-tensioned concrete structure. The failure occurred due to an error in the design and construction process, particularly related to the cables (post-tensioning tendons) used to provide tension reinforcement. There were issues with the tensioning process, including inadequate reinforcement placement, which led to cracking and the eventual collapse, even before the bridge was open to pedestrian loads. This tragedy highlighted the vulnerability of post-tensioned concrete structures when proper quality checks and design validation are not rigorously followed.

[@Bill_Woo]

@@ramajyello Wow, that was an awesome consumption of everyone's time! I would bet that you're quite proud of it! You're probably the hit of every party.

[@ramajyello]

@@Bill_Woo According to ChatGPT: The pedestrian bridge collapse in Florida in 2018 involved a post-tensioned concrete structure. The failure occurred due to an error in the design and construction process, particularly related to the cables (post-tensioning tendons) used to provide tension reinforcement. There were issues with the tensioning process, including inadequate reinforcement placement, which led to cracking and the eventual collapse, even before the bridge was open to pedestrian loads. This tragedy highlighted the vulnerability of post-tensioned concrete structures when proper quality checks and design validation are not rigorously followed.

[@nyhh__]

pretty informative, thank you

[@Dhruva_v10]

Really nice Sir 👍🏻❤

[@Platypus_Warrior]

It's missing the cons of reinforced concrete. The concrete is permeable and the steel rust (even if it's coated with plastic, the plastic cracks and water goes thru). The rusty steel expands and cracks the concrete. That's why modern structures don't last

[@CarloMinerva-gu2ef]

i learned so much in this than my 5 year in engineering

[@Danushka1985417]

Excellent...

[@stingehte]

Yes.. it was informative

[@stonemannerie]

2:53 hard to see, but your car frame looks dented. For anyone trying to replicate this, make sure you place the car jack at the proper position referenced in the car’s manual.

[@xcl9189]

same method can prove : reinforced biscuit can carry much more weight before it completely failed under weight of a car , while plain biscuit fails suddenly and without a warning

[@OluwasegunJoshua-f2e]

I love this video. I love you ❤

[@houssamalucad753]

Amazing video

[@ameen2664]

2:49 now i can see how concrete floors are strong

[@MikeNovelli]

You need to do this test with just the rebar from the inside. Is the concrete taking the force or is it the metal reinforcements that withstand the force?

[@laxmandasgk]

thanks a lot sir

[@kkmardigrce]

Great vid, thx!

[@dr.ashishranjan9989]

Happy new year

[@briltril5834]

Awesome! Thank U

[@rajibmajumdar3361]

Happy New Year to all.

[@DavidJones-es4uq]

Great video ❤

[@peterinbrat]

Bam bam's got a crazy skateboard

[@chuckchuck8177]

My best channel

[@Edward-Wankel]

Форма арки изначально создаёт нагрузки на сжатие и исключает нагрузки на растяжение.😊

[@Don_keedik]

Beautiful

[@farhatali307]

Excellent

[@maemilev]

Is it possible to rectify deformation by cutting the steel and welding it back, and then repouring concrete?

[@madinadi117]

thank you ser

[@rosyidsyahruromadhonalimin8008]

time to open my construction blueprints !

[@ramabg2]

If you arching the concrete, will It solve the problem?

[@metalancing]

Underrated

[@sirotolMustaqim]

okhay, wee thry too supporth you.

[@kirill_goloviznin]

Pre/post-tension does not increase the bearing capacity. Thanks for the video

[@Mrraxo-e3f]

Amazing ❤

[@Innerbrave]

@SabinCivil -- my sincere comment, please consider returning naming and narration, scripting, storyboarding etc. to the very original designs, or your most popular videos. The renaming and redesign is not wanted by most of your viewers, why did you do the rename and changes? Please consider reverting the changes, signed your viewers and a longtime fan.

[@someutubchannel69]

Great vudeo

[@shahidyt9263]

make a video on box girder launching gantry crane in detail how it works please huge fan of you.....

[@hypeboy306]

informative video

[@studentknowledge123]

कई बार जब पुल बनते देखता तो सोचता था ब्रिज के बीच मे wire क्यों डाल रखी है. अब इसकी समझ आई

[@thurkee]

Thanks

[@TeslaElonSpaceXFan]

❤

[@erkinyldrm6579]

Brilliant

[@MichaelSkinner-e9j]

This is why composites are so much better

[@AKA-f7p]

What about shear. Concrete overhead hangs are getting more terrifying than horror movies.