The big benefit of fiber rebar is that it does not rust. Modern structures of concrete fail often because of the metal reinforcement oxidation. The rebar rusts and changes shape and size, the concrete often is defeated from the inside. Structures could possibly last centuries instead of decades because of a small change in materials.
@@juanmatus5708 - That's not accurate. Most FRP rebar has a coating to resist high-pH (anyone spec'ing FRP would assure this) and the lifetime of FRP rebar with pH-degradation would be similar to steel in a best-case environment, while obviously much more resilient in a corrosive environment.
@@williamnunez9609 - Thank you. As with all reinforcing bar, ideally you want to have it shipped and use it in the maximum possible length for economy. Every time you have a cut/seam, it requires substantial overlap, plus the small bit of labor which adds-up as well. When it was suggested that FRP corrodes, that is not an issue to be concerned with, regarding cutting. The simplest way to think about it is to check what environment you're using the rebar in, then confirm the resins used and whether there is any issue. I don't know of any reputable FRP rebar resellers who are selling FRP rebar where there would be an issue; however, it cannot hurt to double-check. BTW - I spec a lot of coastal work in Florida; you wouldn't happen to work there, would you?
It seems like the fiberglass reinforced concrete failed earlier than the steel reinforced concrete at least partly because the fiberglass bars didn't bond as well with the concrete. Although the fiberglass bar alone was brittle and not ductile, those characteristics didn't seem as big a factor in it's failure mode. It seemed rather that the concrete spalled away much worse with the fiberglass than with the steel. Thank you for the informative video.
Civil engineer here, this test is wrong because there are no stirrups . The concrete fails from sheer stress before the rebar starts to have effect. This is not how we do this test.
@@ChristianWagner888 He could have used steel stirrups in the both the fibre glass and steel-reinforced samples, to test the difference in bending strength due to the material used for reinforcement.
Ahí sin duda las varillas de fibra de vidrio arrasan frente a la varilla de acero. Obviously the GFRP doesn't suffer corrosion, so the result could be even better for the GFRP concrete against de steel reinforced one.
I see most of the coments comparing steel, concrete and fiber implementations in construction mostly. Yea theres oxidation and etc. But fiber is more efficient in modern techn regarding windmilss and such. Lighter, easier to shape and mold. It takes good procces of mixing,wraping,heating,drawing out air from the structure and such but it makes it much more efficient and less expensive for making and repairing. Its modern day eras material that industries use to pervent old ways and long ways of making em. Fiber is the best for coating for everyindustry besides constructing buildings acording to me despite they use it for some specific type buildings which are rare and not designated to be for living of people.
Could you try placing the reinforcing stirrups in the steel and the polymer? Should it result in greater resistance in both cases? I will be attentive to your comments, thanks
I've never seen fiberglass reinforcement like this. Usually fiberglass reinforcement in concrete is in the form of chopped strands mixed throughout the concrete. I'd be curious as to their impact on the strength
The concrete by itself can produce silicosis in the long term, adding chopped glass fiber is thge same, but in a gfrp the glass fiber goes incapsulated by a polymer. El propio hormigón contiene arena de sílice y el polvo que produce puede generar silicosis a largo plazo, añadir fibra de vidrio cortada no lo empeora mucho más, ahora bien, con las varillas corrugadas de fibra de vidrio no hay ese problema ya que van encapsuladas en un polímero, eso sí, al cortarlas desprenden polvo tóxico por inhalación.
The chopped AR fiber glass in concrete is mainly used for flooring. El hormigón reforzado con fibra de vidrio cortada del tipo Álcali Resistente se usa mayoritariamente para soleras, no para forjados, vigas o pilares, los cuales suelen ir armados.
I wonder if hair would be a beneficial additive. I believe this was done with plaster in the past. They also have coated rebar that resists corrosion. I'd like to try a combination of the hair and coated rebar for a test.
The rings that are pressed into the exterior of the rebar are what hold the rebar in the concrete, if you think the fiberglass rings are going to hold into the concrete better than the steel ones then this might not have been so obvious to you.
Yeah... and here I'm sitting in a house built in 1956 using A0 steel rebars - unless they had insufficient concrete cover all those bars suffered very little corrosion and surface only. It's very different in things like bridges or foundations - where there's plenty of water during the lifetime. And yet there are bridges made by nazis (up to 1945) with little to no degradation of rebars. And same goes to bunkers etc. As with everything - it depends. It depends how fast pH of concrete will drop below ~10.8, it depends how often water would penetrate concrete, it depends how much chlorium will sink into a concrete etc. etc.
Try putting both to a temperature test for expansion, then humidity, then both temperature and humidity, then both with stress. Leave each in a salt bath for a month too.
Great comparison. But, like others have said, maybe less or smaller crushed gravel. I've been using pink bar recently, 7 ft. basement cinder block wall repairs. Wear gloves, they do have splinters, ouch. Might use rebar again, $1 more for fiberglass 10 ft. but for 7 - 8 ft. walls, rebar might be overkill.
Very good behavior of the GFRP rebar reinforced concrete, even better of what I was expecting for... Muy buen comportamiento del hormigón reforzado con varillas de PRFV, mejor de lo que me esperaba.
Call me old fashioned but I miss the mentality of building things to last generations. Iron reinforcement in concrete seems to me like a short term fix, like lead water pipes or asbestos ceilings, just not the right material to be using for the job.
Steel is used in the main support members and fiber can only be used for non critical structure like flooring the reason is steel is stronger and also more flexible than fiberglass.
If you would have used the same weight in glass fiber bars as what the steel weighs and did the test that way you would get better result,pound for pound type thing
You dont get the full benefit of fibre glass reinforcement when you bunch it up like that in a rod. You should finely chop up and mix the individual strands with the concrete, to provide bonding strength between the concrete and fibre glass.
I live in the Dominican Republic. Retired American. No experience in construction. I live about 2 mi from the Caribbean. Presumably there is some salt content in the air here. I see a lot of failed concrete around with rusted swelled rebar literally blowing the concrete apart. I am fascinated with the idea of replacing iron rebar with fiber reinforcing in some applications. The best roofs around are flat poured concrete with rebar. This can also be the flloor of a second story, etc. A lot of labor goes into building the plywood forms and supporting the forms with beams and a forest of posts underneath. I have a yearning to build a very different kind of roof. I imagine a roof poured in strips in the form of a downward-arching catenary shape. I understand that a catenary puts the shape under pure tension. There would need to be some kind of sling (a sort of hammock) to support the cement while setting. When set, the catenary shape would be flipped over (arch upwards) which should put the material under pure compression. I'm imagining eliminating the iron and just using fiber. Multiple abutting strips would form the roof. No good for second floor, but a pleasant arched ceiling indoors. Does anything make sense here? Does anyone want to talk about this? Peter. prx555 at gmail
If concrete, like say papercrete, is made using hydraulic or mechanical pressing, then of course it will get used to being pressed again, even after curing.
That test has a big mistake. Both steel an fiber are failing by shear, because it is need to add stirrups to the beam. If you see the cracks both are at 45° of the load to the bearing.
Are you smoking man? Did you seriously say that and mean it? You're telling me something that is less than half the weight of the steel is only marginally weaker because the weight wasn't taken into account in the amount of material used. If he used the number of bars of fiber glass that would weigh the same as the steel it wouldn't budge.
do you know how to conduct tests for real ? The strength for steel here is ultimate as shown by you but it becomes useless at soon as it reaches the yield strength. you know plastic and elastic deformation ? the yield strength of GFRP is much higher than steel but you are considering the failure strength here.
My guess is that steel rebar is better anchored in the concrete than the fiberglass, since no rebar was broken. Ofcourse, since no stirrups were used, the ultimate limit state was achieved by shear force, not the moment, and therefore rebar didnt reach the maximum tensile force. Still, a good test for youtube :)
Yet America waits on Chinese steel. I remember when America had a backbone of industrial might, sadly its cheaper to pay someone overseas rather than paying a fallow countryman a living wage. Its not about being fair it's about the freedom to do business Reagan reckoned, how's that going? Dont hate educate.
If concrete was truly this weak then it wouldn't be the second most used substance in the world. These videos are incredibly misleading and you'd be hard pressed to find a better substitute for concrete in our world.
I really hope you're right about that because thousands of concrete buildings have people who work or live in it. Also concrete houses are cheaper in my country and I am interested to buy one but I read some very alarming things about concrete that I hesitate a lot.
An inaccurate test There are no stirrups and aggregate plays a big roll in strength you used boulders which you have no clue where they ended up, did one get all the boullders and the other none did one get more sand in the mix than the other and what was the cure time was the centers still hot. Way to many variables in this test and proved nothing.
I agree with you 100%. That looked like they used 3 inch crushed stone. Should have used no bigger than 3/4 inch. 33% sand, 33% 3/4 inch crushed stone and either a 60-80 lbs bag of cement. And properly mixed, felt like it wasn't even mixed right either.
I bet a lot of work went into this video, more than usual. Thank you.
The big benefit of fiber rebar is that it does not rust. Modern structures of concrete fail often because of the metal reinforcement oxidation. The rebar rusts and changes shape and size, the concrete often is defeated from the inside. Structures could possibly last centuries instead of decades because of a small change in materials.
@@juanmatus5708 alkaline didnt decompose my gfrp.
@@juanmatus5708 - That's not accurate. Most FRP rebar has a coating to resist high-pH (anyone spec'ing FRP would assure this) and the lifetime of FRP rebar with pH-degradation would be similar to steel in a best-case environment, while obviously much more resilient in a corrosive environment.
@@InspiredScience You basically just let me know to not cut the FRP rebar, being that most people do because of size of project.
@@williamnunez9609 - Thank you. As with all reinforcing bar, ideally you want to have it shipped and use it in the maximum possible length for economy.
Every time you have a cut/seam, it requires substantial overlap, plus the small bit of labor which adds-up as well.
When it was suggested that FRP corrodes, that is not an issue to be concerned with, regarding cutting.
The simplest way to think about it is to check what environment you're using the rebar in, then confirm the resins used and whether there is any issue.
I don't know of any reputable FRP rebar resellers who are selling FRP rebar where there would be an issue; however, it cannot hurt to double-check.
BTW - I spec a lot of coastal work in Florida; you wouldn't happen to work there, would you?
Щоб арматура не іржавіла,
треба зробити правильно
захисний шар бетону.
It seems like the fiberglass reinforced concrete failed earlier than the steel reinforced concrete at least partly because the fiberglass bars didn't bond as well with the concrete. Although the fiberglass bar alone was brittle and not ductile, those characteristics didn't seem as big a factor in it's failure mode. It seemed rather that the concrete spalled away much worse with the fiberglass than with the steel. Thank you for the informative video.
Civil engineer here, this test is wrong because there are no stirrups . The concrete fails from sheer stress before the rebar starts to have effect. This is not how we do this test.
Good point! Are fiberglass stirrups available?
@@ChristianWagner888In Germany WE already had some projects with Fiber Glass stirrups, but Not many. So it isn't really mainstream Up to now.
@@ChristianWagner888 He could have used steel stirrups in the both the fibre glass and steel-reinforced samples, to test the difference in bending strength due to the material used for reinforcement.
Do you know of a better demo / explanation of the pros and cons of rebar?
Wouldn’t this test be a good indicator for use in driveways?
I wonder what the strength difference would be if you subject them to salt water spray for 5 minutes every hour for a year.
Ahí sin duda las varillas de fibra de vidrio arrasan frente a la varilla de acero. Obviously the GFRP doesn't suffer corrosion, so the result could be even better for the GFRP concrete against de steel reinforced one.
@@Eneko-J-B😅😅😊😊😅
I see most of the coments comparing steel, concrete and fiber implementations in construction mostly. Yea theres oxidation and etc. But fiber is more efficient in modern techn regarding windmilss and such. Lighter, easier to shape and mold. It takes good procces of mixing,wraping,heating,drawing out air from the structure and such but it makes it much more efficient and less expensive for making and repairing. Its modern day eras material that industries use to pervent old ways and long ways of making em. Fiber is the best for coating for everyindustry besides constructing buildings acording to me despite they use it for some specific type buildings which are rare and not designated to be for living of people.
Can build a new home for frp
Large stones in a small space gives it
less strength.
Could you try placing the reinforcing stirrups in the steel and the polymer? Should it result in greater resistance in both cases?
I will be attentive to your comments, thanks
Steel rods with a cover of fiberglass straw🤔 to keep rustfree from at least outer surface.... basically a fiberglass coated steel rods...
I've never seen fiberglass reinforcement like this. Usually fiberglass reinforcement in concrete is in the form of chopped strands mixed throughout the concrete. I'd be curious as to their impact on the strength
Home depot sells it now. I'd stick with steel.
Can concrete with fiber glass potentially be hazardous for your health? When inhaling the dust?
@@lem8304 Cement by itself is already harmful to your health when inhaling the dust. Adding the fiberglass won't really make it much worse.
The concrete by itself can produce silicosis in the long term, adding chopped glass fiber is thge same, but in a gfrp the glass fiber goes incapsulated by a polymer. El propio hormigón contiene arena de sílice y el polvo que produce puede generar silicosis a largo plazo, añadir fibra de vidrio cortada no lo empeora mucho más, ahora bien, con las varillas corrugadas de fibra de vidrio no hay ese problema ya que van encapsuladas en un polímero, eso sí, al cortarlas desprenden polvo tóxico por inhalación.
The chopped AR fiber glass in concrete is mainly used for flooring. El hormigón reforzado con fibra de vidrio cortada del tipo Álcali Resistente se usa mayoritariamente para soleras, no para forjados, vigas o pilares, los cuales suelen ir armados.
More fiber glass is needed because the rebar is heavy. Maybe 1:2 ratio
I wonder if hair would be a beneficial additive. I believe this was done with plaster in the past. They also have coated rebar that resists corrosion. I'd like to try a combination of the hair and coated rebar for a test.
Coated rebar bad
Horse hair and lime in plaster or something like that
Pretty sure hair and other fiber is for resisting cracking when portland cement is not involved
Like a moth to a flame...here I am watching another one of these videos 😂
can you do fibreglass mesh strands and steel rebar then steel strands and steel rebar ?
Can I use your video clips for my shorts video 🇮🇳❤️
The rings that are pressed into the exterior of the rebar are what hold the rebar in the concrete, if you think the fiberglass rings are going to hold into the concrete better than the steel ones then this might not have been so obvious to you.
If your primary requirement is strength for a short time (say
Yeah... and here I'm sitting in a house built in 1956 using A0 steel rebars - unless they had insufficient concrete cover all those bars suffered very little corrosion and surface only. It's very different in things like bridges or foundations - where there's plenty of water during the lifetime. And yet there are bridges made by nazis (up to 1945) with little to no degradation of rebars. And same goes to bunkers etc. As with everything - it depends. It depends how fast pH of concrete will drop below ~10.8, it depends how often water would penetrate concrete, it depends how much chlorium will sink into a concrete etc. etc.
Depends on the quality of rebar
⬇️The count of people who finds enjoying this type of videos⬇️
मस्त भाई दोनोका फरक दिखा दिया ❤❤
Sempre tive curiosidade de saber se uma coluna de concreto era realmente resistente
Se podria lograr alcanzar la resitencia agregando mas barras de fibra de vidrio, muy aceptable el comportamiento de la varilla de fibra en esa prueba
I would love to see ultra high performance concrete on these
Try putting both to a temperature test for expansion, then humidity, then both temperature and humidity, then both with stress. Leave each in a salt bath for a month too.
#Accurate Result 💯💯💯
We Cant Believe On Plastic , If We Build House
Teste muito bom e satisfatório.
How about steel rebar and added glass fiber for reinforcement?
Great comparison. But, like others have said, maybe less or smaller crushed gravel. I've been using pink bar recently, 7 ft. basement cinder block wall repairs. Wear gloves, they do have splinters, ouch. Might use rebar again, $1 more for fiberglass 10 ft. but for 7 - 8 ft. walls, rebar might be overkill.
How does pinkbar compare to steel? Pouring a slab in 2 days
This is fine for a home ‘test’/ fun, but bears no absolute resemblance to a real structural test.
Can u make another video using both materials in one Concrete and test it. I bit the results will surprise u 👍🏻
Bhai ase or bhi test kro good
any body who understands engineering and design can make a fiberglass pillar stronger than steel.
Wayy to much stone in that mix
it would be good to see a micro fiber concrete too
Very good behavior of the GFRP rebar reinforced concrete, even better of what I was expecting for...
Muy buen comportamiento del hormigón reforzado con varillas de PRFV, mejor de lo que me esperaba.
Call me old fashioned but I miss the mentality of building things to last generations.
Iron reinforcement in concrete seems to me like a short term fix, like lead water pipes or asbestos ceilings, just not the right material to be using for the job.
Looked like way too much rock in the mix. How about a video with a proper mix with Helix steel for additional reinforcement
what about coating with fiberglass fabric where open column and row surfaces of existing old buildings as reinforcement ?
It's not an accurate test because the concrete with steel reinforcement failed in concrete shear before the steel failed.
Like why the heck would you perform a test that is no representative of real life construction methods
Steel is used in the main support members and fiber can only be used for non critical structure like flooring the reason is steel is stronger and also more flexible than fiberglass.
Once you put both the iron rods and the fiber in the fire, make a video and show it.
If you would have used the same weight in glass fiber bars as what the steel weighs and did the test that way you would get better result,pound for pound type thing
exactly, GFRP has low midulus of elasticity hence it requires more surface area
Let´s calculate how much should it resist then crush it and than compare it to the expectation! It should have been much more fun.
carbon Fiber Rebars and its Slabs made with Concrete shd also be tested to tell weather it can compete with steel or not.
Thank you, it was well made test and very interesting! :)
Noting that the fiberglass did not shatter or splinter when encased in concrete.
Did you let the concrete cure for 27 days?
You dont get the full benefit of fibre glass reinforcement when you bunch it up like that in a rod. You should finely chop up and mix the individual strands with the concrete, to provide bonding strength between the concrete and fibre glass.
I live in the Dominican Republic. Retired American. No experience in construction. I live about 2 mi from the Caribbean. Presumably there is some salt content in the air here. I see a lot of failed concrete around with rusted swelled rebar literally blowing the concrete apart.
I am fascinated with the idea of replacing iron rebar with fiber reinforcing in some applications.
The best roofs around are flat poured concrete with rebar. This can also be the flloor of a second story, etc. A lot of labor goes into building the plywood forms and supporting the forms with beams and a forest of posts underneath.
I have a yearning to build a very different kind of roof. I imagine a roof poured in strips in the form of a downward-arching catenary shape. I understand that a catenary puts the shape under pure tension. There would need to be some kind of sling (a sort of hammock) to support the cement while setting.
When set, the catenary shape would be flipped over (arch upwards) which should put the material under pure compression. I'm imagining eliminating the iron and just using fiber. Multiple abutting strips would form the roof. No good for second floor, but a pleasant arched ceiling indoors.
Does anything make sense here? Does anyone want to talk about this? Peter. prx555 at gmail
one fiber breacks tis waste but steel can be use again right
Interesting that the FRP didn't shear, but the concrete-FRP bond failed.
You need bigger rock, smaller mixing container, smaller point load (or just the opposite for testing purposes) Just saying...
Good
Agar jalaya jaaye to fiber turant jal sakta hai bhai
The video was sensational.
Stainless steel or zinc coated galvanized steel is better option, in steel plants rustproof chemicals should add while melting
when earth quick comes , steel service due to flaxibilty but fiber down in in single shot . so care full dont go with advartised
shouldn't the mixture be 50/50?!! that was more like 66/33 sand to cement
Stirrups?
Concreto com fibra já tinha rachado muito muito antes dele considerar como a quebra.
Can you try this with MST bar?
stirrups please in both cases.
If concrete, like say papercrete, is made using hydraulic or mechanical pressing, then of course it will get used to being pressed again, even after curing.
उज्जैन में मिल जाएगा क्या रतलाम में मिल जाएगाक्या
개인적으로 돌을 강가에 있는 타원형 돌을 사용했다면 강도다 더 올라갈것으로 생각됩니다. 모래또한 마찰을 주어 모난 부분을 제거 해준다면 강도가 더 올라갈것 같습니다.
Interesting point
@@mythocrat 근데 재료값이 올라감 ㅋㅋ
try with carbonfiber rebar bro
Whatever it is,steel is much more safer and worth reliable.
Hello sir can you display the bar diameter of the test, and in what unit of weight is applied to the rebars?
Where we get this?
For simply supported beam, why you are using top bars
That test has a big mistake. Both steel an fiber are failing by shear, because it is need to add stirrups to the beam. If you see the cracks both are at 45° of the load to the bearing.
The bars are not pretensioned? Contrete works best under compression. I'm not sure this is an accurate test of how concrete would actually be used.
Very good
But... isn't rebar for tension, not compression strength?
Why not just use an actual concrete mix instead of making your own with those giant rocks?
If you press them like a beam, the bars must be the bottom of concrete
still is steel is steel i will go with steel becuase one fiber brack it cant pe joint but steel can be joint
Am i the only one who's only now noticing that he's wearing a jacket from the German military
🎉🎉🎉🎉❤
Can anyone tell me the load taken by steel concrete and frp concrete to collapse?
Just proves older cars are better than new ones, yet again.
Are you smoking man? Did you seriously say that and mean it? You're telling me something that is less than half the weight of the steel is only marginally weaker because the weight wasn't taken into account in the amount of material used. If he used the number of bars of fiber glass that would weigh the same as the steel it wouldn't budge.
Notice that the concrete does not adhere to the fiberglass. There appears to be no bonding.
Качество композитной арматуры зависит от применяемых материаллов и квалификации производителя.
Nice video but annoying loud music
Нужно было добавить стекловолокно в виде коротких волокон в раствор, чтобы волокна распределились по всему объёму. Арматуру тоже нужно оставить.
👍
do you know how to conduct tests for real ? The strength for steel here is ultimate as shown by you but it becomes useless at soon as it reaches the yield strength. you know plastic and elastic deformation ? the yield strength of GFRP is much higher than steel but you are considering the failure strength here.
I DON'T GET IT, GFRP SHOULD RESICTE MORE THAN STEEL,? CAN SOMENO EXPLAIN IT ?
My guess is that steel rebar is better anchored in the concrete than the fiberglass, since no rebar was broken. Ofcourse, since no stirrups were used, the ultimate limit state was achieved by shear force, not the moment, and therefore rebar didnt reach the maximum tensile force. Still, a good test for youtube :)
what was the size of the concrete
About 350
concrete + fibreglass started hairline crack at more than 900+
Buitefull
After bending glass lost every thing needed it is fragile useless, Hard plastic pipes containing greased steel bars are permanent solution
Yea good
Steel best
Dono me ring nahi Hai to majbooti kaishe ayega backwash video
Steel is best don't trust on fiber glass
China learning how to reinforce their concrete be like. Plastic is good enough 👍
Yet America waits on Chinese steel.
I remember when America had a backbone of industrial might, sadly its cheaper to pay someone overseas rather than paying a fallow countryman a living wage.
Its not about being fair it's about the freedom to do business Reagan reckoned, how's that going?
Dont hate educate.
If concrete was truly this weak then it wouldn't be the second most used substance in the world. These videos are incredibly misleading and you'd be hard pressed to find a better substitute for concrete in our world.
I really hope you're right about that because thousands of concrete buildings have people who work or live in it. Also concrete houses are cheaper in my country and I am interested to buy one but I read some very alarming things about concrete that I hesitate a lot.
This the truth😂😂😂
An inaccurate test There are no stirrups and aggregate plays a big roll in strength you used boulders which you have no clue where they ended up, did one get all the boullders and the other none did one get more sand in the mix than the other and what was the cure time was the centers still hot. Way to many variables in this test and proved nothing.
Bad concrete mix.
I agree with you 100%. That looked like they used 3 inch crushed stone. Should have used no bigger than 3/4 inch. 33% sand, 33% 3/4 inch crushed stone and either a 60-80 lbs bag of cement. And properly mixed, felt like it wasn't even mixed right either.
Unreliable test, fatal concrete... Actually, it's not concrete, but a cake.