Fiber Reinforced Concrete Jack Hammer test V3

[@victorsr6708]

Because of this video I insisted on fiber reinforced and rebar for my patio and driveway. The concrete guys were telling me that what I wanted was a commercial grade job and that I was overdoing it. My resonance was 1. I’m paying so I get what I want 2. I’m the one that going to live with the concrete on a daily basis for the rest of my life NOT them. I couldn’t be happier with the results, thanks for posting and educating people. Now we know more than most concrete guys hahaha

[@Veldtian1]

Better to over do it then under do it.🤜

[@schakravorty1021]

Are these glass fiber or polypropylene fiber? Which one is better for concrete mix?

[@boomfar4760]

You are right about you pay for what you want but it’s usually rebar or fiber not both. This is me who work with one of the biggest companies in the world using concrete in a complex and tough environment

[@Promilus1984]

@@boomfar4760 why not both? Each has unique properties and they're complementary...

[@onedayagogo]

yep ! right on ! ✊

[@austinlangford4520]

A very clever way to simulate or speed up time and show the long term fibre benefits of fatigue, impact including loads, energy absorption and stress etc - enhancing the lifespan and durability of concrete.. Non corrosive as well.

[@tims9527]

What this tells me is to NEVER bid a concrete demolition job with 7 lb per CY macro fibers!

[@matheusfaria7230]

lol

[@hamzisharky8793]

Please tell me what does it mean by CY ? Is cy = m³ ?

[@mds6387]

Demolition nightmare.

[@523hotsauce]

Giant difference between 1 lb vs 7lbs of fiber per cubic yd--note that the macro fiber block had SEVEN lbs. and the other two that had any fiber had 1 lb. and 1.5 lb. fiber/cubic yd. respectively. Wonder what the results would have been if they all had 7 lbs./cubic yd.

[@gracilism]

7lbs is on the high side, but not an atypical installation. My current foundation calls for 5lbs/ cy with no steel. I'm unsure is the other materials densities are what they are because that is their manufacturers' recommendations.

[@shawnr771]

LBS is pounds of material to cubic yards of concrete. so 7 pounds of macro fibers to 1 cubic yard of concrete. They are using fiber material as an additive to concrete to give it strength. Depending on the job requirements. Fibers are required in concrete and masonry materials. There are now certain ISO standards that allow some types of fibers to replace or reduce the amount of bar(steel) in concrete. One thing to be careful of is contractors using a sub grade fiber. Some of those fibers will actually deteriorate in concrete. IF you use only fiber without steel reinforcement insure that your contractor is using the approved fibers. I would like to know what curing process was used.

[@DummyFace123]

For blocks like those for testing, I imagine just submerged em in a kiddy pool or something

[@rosseryn8216]

We know how much Macro synthetic. But what is the specific material? There are pages of Macro synthetic fibers.

[@Alastair510]

Would have been nice to have seen a comparison with rebar.

[@whyme5024]

With rebar or mesh, concrete will still crack but the pieces will hold together.

[@outdooreng4973]

crazy .... so so powerful block ....you will not see this powerful resistance in other normal bars reinforced concrete

[@glhfsport4682]

so macro seems the way to go huh? but is this expected? becuse you have 7 lbs/cy and much less in the others. or is that what is recommended?

[@maritimer95gt]

Awesome video.

[@irismartink2751]

Watching it in 2024, 9 years later, I'm amased we're still using rebars...

[@JustinCrediblename]

fibers actually doing their job? this will change the reputation of fiber.

[@adrianobonaldo8941]

I know for sure that in Italy there is a building with concrete columns and beams where the engineers used stainless steel fibers oriented in the mixing, instead of classic steel rods bars.

[@darthvader5300]

​@@adrianobonaldo8941 In the 1950s we have used graded triple-twisted stainless steel fibers made out of high strenght stainless chrome-moly-nickel-vanadium high manganese steel fibers of which 3 of them are twisted together in a 33 degree angle forming a single steel fiber .20 millimeter in diameter or 1/5th of a millimeter thick. And are graded at 1", 2", 3" inches in lenght at 1 cubic foot, 2 cubic feet, and 3 cubic feet in volume or a cube 2", 4", and 6" in width and 12 inches in height and 12 inches in lenght of which the 1st is divided by 1 ", 2", and 3" in subdivided lenghts. And 1 cube of that is added per cubic yard of concrete of 2 parts cement, 1 part sand, and 2 parts gravel but in practice 3 to 4 such cubes are added. It is mixed with 1.25 parts water or more with superplasticizers inorder to form (military grade) a semi-plastic and semi-liquid concrete mix. It is pre-mixed thoroughly first before the water pre-mixed with the superplasticizers is added in a high speed cement concrete mixer. Proper use of concrete vibrators are used to remove air bubbles with causing the gravel to accummulate at the bottom but the plasticizers were also modified to make sure that no air bubbles are present and it is self-flowable and self-placing. We use military grade strenght refractory calcium aluminate cement of the early high strenght type that cures and hardens in 6 to 12 hours. It achives full strenght in 6 to 12 hours that a heavy tank and travel right over it and park on it without any problems. This type of concrete is used for military purposes but we added 10% basic silicon based geopolymers to it during the pre-mixing period before water is added and has to be poured within 15 minutes. The use of many high speed cement concrete mixers is necessary and they should be timed paralell of each other so that they can pour simultaneously the required amount into the molds.

[@sugianto4219]

Thank you for sharing these. It's really helpful. ☺👍

[@conradnudd7398]

Why didn’t you use the same weight per cy for all the fiber? I want to build a swimming pool by digging a trench for the perimeter and pouring fibramesh concrete, why wouldn’t that work? After the pour I would dig out the inside of the pool then pour the bottom.

[@CONCRETEMANtv]

Mono Filament Micro fiber? That cube was harder to hammer then the control block? Cant see how. This test seems that it is not fully accurate and further testing is needed. Use a bit bigger hammer and have multiple blocks of each in case anomaly.. Thanks for making the video.

[@djilyaz]

The new asbestos

[@bashkillszombies]

Why would you set 1lb/cy up against 7lb/cy? Kind of an unbalanced test isn't it?

[@alexsarabura8354]

They are different fibers, different dosage rates Specific gravity is different for both

[@h.b2029]

Excellent. very helpful. Thanks. God Bless.

[@terencecampugan2558]

what is the macro synthetic fiber did you used?

[@freeman6147]

0:10 The video says 7 lbs / cubic yard

[@jhyrumgrant]

That's not terribly useful as there's no numerical standard for the destruction. How much psi per second before failure? Tensile performance? It's a anecdotal demonstration.

[@Veldtian1]

It's the same force applied to all samples, c'mon.

[@vanchinh8779]

wao. tỷ lệ sợi thủy tinh trên xi măng? 2 - 10% slab concrete 13mm ?

[@clydecox2108]

I like it.

[@jamaludinshamsudin4821]

this test is not relevant. we need strenght test such as loading test like a beam or the floor strenght test which serve to it purpose.

[@rogerwoodland2587]

this is the way to go

[@freeman6147]

It's relevant for anyone who wants to protect their concrete from a Jack-hammer.

[@richhagenchicago]

I noticed the amounts of fiber added were significantly different for the different types. Why? was it a vendor recommended amount? It appears clear that the fibers add some tensile strength to the concrete. Although from the 'jack hammer test' I can not quantify how much. I also can not tell if it has an impact on compressive strength. I would also have liked to have seen beam testing and compression testing in a press in addition to the jack hammer test. Also how do the fibers impact the permeability of the concrete as that leads to spalling and other defects in freeze thaw cycles in particular, and degradation of rebar and reinforcing. I would guess that fiber reinforcing is beneficial, but I would want to make sure I was not trading a benefit in one property for a deficit in another that could impact my project more.

[@emperorhadrian6011]

Bunkers...

[@odera8289]

It is relevant for demolition engineers

[@HIM-assoqy]

what u mean by lb/cy ?

[@Survivorguidetv]

lb/cy means Pounds per cubic yard of concrete.

[@boogerking7411]

It's an ancient languange used by elders

[@blastking2006]

Sweet

[@islandfantasy5931]

Nice try. That layer under the product you are promoting is the reason why it lasted longer.

[@waro9801]

Yeah, that is suspicious that the best product also appears to have something under it absorbing some of the impacts.

[@curtissharris8914]

Nothing under look when it's split...

[@whyme5024]

Not so. It is real. I am a scientist and developed one of these.

[@chinhvannguyen1685]

How many fiber Do you mix in concrete?

[@Ariccio123]

It says it in the video

[@williambaker7781]

@@Ariccio123 l

[@theebalz]

3% of the total concrete has been found to approximately triple the psi of the Concrete.

[@GauravSingh-zz9rf]

​@@theebalz 3% by volume right

[@boomfar4760]

Do not use vibration when casting concrete with fiber. Never! That’s a amateur mistake

[@sundhararaja1429]

What is the fucking Thing on the bottom of that fucking macro fiber concrete

[@felixgwalls5601]

Good day sir. Can I have your contact

[@blastking2006]

Is this air crete

[@TheRobojay]

no by the looks of this. For some reason it's on an aircrete playlist but it is still a great video nonetheless.

[@LoisMcQuinn]

i was wondering what would happen if you added fibers to air crete...something to think on.

[@blastking2006]

What does macro synthetic mean 7 ibs

[@utubeape]

small fibres of a synthetic type such as nylon, PU, fibreglass etc added to the mix 7lb per cubic yard

[@blackbuddhaa]

2 inch polypropylene fibers with approx 0.8 specific gravity

[@22jduran]

Hmm..I'm not sure if id be doing that on a finished slab....

[@Survivorguidetv]

Maybe they know a good place to get some new concrete?

[@vikashkumaryadav9706]

Is code

[@SyedJunaid-qj2sf]

This video is totally fake very intelligently operated this powered drill machine why you are not showing the fully operated drill machine

[@scottprather5645]

. So you put four times more of the one brand and this is supposed to be a meaningful test of the product? An absolutely useless demonstration

[@vanderumd11]

The volume is the same, weight of strand is different

[@isaacwillson8617]

No sir - you need to buy the product- it speaks for itself- there is no money back guarantee because you will be happy with it- please try not to think too hard- you need to spend the money to get the results- you will see- you need to buy first and then complain later- you can not complain if you do not spend the money first- isn’t that right?

[@scottprather5645]

@@isaacwillson8617 no!.... wrong