I worked on a 100 year old church that had steel rebar in the concrete. The steel rebar had turned into powered iron; it had no strength whatsoever. I just went to the 2022 World OF Concrete show in Las Vegas. Price of 20' sticks of 9/16" glass rebar ($7) was less than #4 steel rebar ($9.21). Once they get a network of glass rebar suppliers to cut shipping costs, I think steel rebar will be history. Glass rebar is 2 times stronger and 1/4 the weight.

@robnowe5464

Жыл бұрын

The problem is FRP has lower weight, reduced weight injuries for handlers, lower ductility, lower shear resistance, and lower fire resistance and cannot be formed/bent on site. Don't get me wrong, I like many of FRP's attributes, especially the corrosion resistance, but ductility and fire and shear and forming are all critical attributes.

@bkucinschi

Жыл бұрын

@@robnowe5464 : Hi Rob, so you cannot bend the PINKBAR fiberglass rebar on site? I want to build an ICF basement, and need to bend rebar for corners. What if it heated? would that work.

@johnunsicker7440

Жыл бұрын

@@robnowe5464 Actually it as higher shear strength it will withstands a fire of 1,000 degrees.

@Promilus1984

Жыл бұрын

@@johnunsicker7440 fibers will, bonding material will not and when force is applied perpendicularly to the rebar FRP is weak against it. That's why it requires more of FRP to compensate which leads to minor difference in overall reinforcement weight and cost. So only chemical resistance still applies. There's also big difference between how steel and frp behave nearing critical load. Ideally I'd love to see the best of both world but frp alone isn't perfect solution for concrete structures. It's absolutely a win in foundations and septic tanks where regular steel is constantly exposed to corrosion. But other than that... it's not as easy as you think.

@mahyadnaadlaw3112

9 ай бұрын

@@Promilus1984 also, concrete mix using gfrp differs from using steel rebar

It appears the rods did their job pretty well. And it is obvious that the rods were not installed properly. They are on the bottom of the slab, not in the middle as they should be. Seems pretty positive for the fiberglass

@williamrogers4290

11 ай бұрын

You are correct. The reinforcement was not placed properly. However, since concrete is weakest in tension, the bottom 1/3 of the slab is in more tension than the middle of the slab and is therefore a good place to have the reinforcement.

I don't know much about fiber glass rebars, but that claw/eagle looking like attachment is bad ass!

@taylorteresi5476

3 жыл бұрын

The beak is sickkk

Can we redo this test in 50 years? I think the fiberglass rebar wins because of 1. it did it's job 2. was much easier and lighter for installation 3. DOES NOT RUST.

@ashishgandhi5527

2 жыл бұрын

About 2 years ago there was a round robin study done by three universities and 2-3 DOTs that core out insitu fiberglass rebar in about 15-18 bridge decks across the country and examined the performance and impact of time on the fiberglass rebar. They found no degradation and forecasted 75-100 years life expectancy.

@12vLife

2 жыл бұрын

@@ashishgandhi5527 That's great news.

@esalinas53

Жыл бұрын

I want to add that it looks like recycling the concrete with fiberglass is also faster process and cheaper.

@robnowe5464

Жыл бұрын

@@ashishgandhi5527 Can you drop in a link to the study?

@robnowe5464

Жыл бұрын

@@esalinas53 It does look like the removal of the concrete is faster and easier and less expensive, BUT the rebar is NOT recyclable and the broken pieces of it are more time intensive than steel which stays connected better and can be handled with magnets. I think the recycling is more problematic. Please correct me if I am wrong.

The fibreglass seems to have been installed a little low, too close to the ground. 🤷🏻‍♀️

@ashishgandhi5527

2 жыл бұрын

Sadly a common problem in application with any rebar (fiberglass or steel) - not placed at the recommended height in the slabs.

@markstone1619

Жыл бұрын

Not really a "seems" about it. That rebar was definitely placed totally ineffectively on the ground with the concrete simply poured over it. It provided zero actual reinforcement & a total waste of money spent.

@wcb2251jr

Жыл бұрын

I was thinking the same thing. Looks to not have had any rebar chairs or half pieces of brick or any support to place it in the middle of the concrete. Love how light the whole pieces of slab seemed.

Rebar is used to increase the tension strength of the concrete. None of the destruction of the Pinkbar showed it being destroyed in tension. It was all bending. I'd be interested in some indpendent testing in tension and checking its adhesion to the concrete.

Just note that the old driveway they removed seems to have no crack in it. So the fiberglass rebar (probably only 3/8") did its job. Why exactly was it replaced ??

Isn't the rebar supposed to be positioned higher up in the slab? This looks like it was almost flat on the ground when the slab was poured.

@jayfreischlag4666

2 жыл бұрын

My point exactly. IF it was chaired up it was poor and its also like 3" thick.

@stevesirak

2 ай бұрын

It's best placed in the lower 1/3 of the slab.

Thanks for doing this video, Jason! I am looking into using this for a pad in Northern Nevada on our property (RV pad).

The fiberglass was not well embedded in the concrete apparently having less than half an inch concrete cover. It still performed sufficiently for the slab. I would consider it in corrosive environments, possibly in foundations that could have salty ground water near the sea. In an earthquake prone region, I would not want it higher up in the structure, as it seems to be less ductile as it fails, suddenly losing all strength. A driveway near the sea seems to be a good application as well. It's not something I have ever seen available in the Philippines though.

@honeytubs

4 ай бұрын

For improperly embedded bar fiberglass is definitely better; doesn't need protection of the concrete to prevent rust. Installation errors are common so that could be a big benefit of fiberglass.

Just found out today that this exist. Will definitely use it when doing my home on my beach from home in Liberia.

Who ever did the original concrete work sucked. The rebar was at the bottom of the concrete.

From what I've seen I'm not a fan of Fiberglass Rebar, but as you can see it wasn't installed properly. It should have been place in the center of the slab not at the bottom as shown in this video.

@oxconcreteremovalfirewoodm3863

2 жыл бұрын

Yes I agree whoever poured the concrete didn't lift up the fiberglass rebar

@brandonflowers8790

2 жыл бұрын

with the fiber glass rebar it can be grinded down with the cement and re used compared to having to separate it from the concrete to recycle the steel. No Rust from fiberglass Rebar

Do slabs like that stay whole when they have steel rebar? Can’t believe you picked up and put it in back of truck without it breaking .

I like it

It is probably also fine for those steel cat-walks that get 2-3 inch slabs. As long as its job is to be flat and not to hold the roof up. That's my vote.

Where would you he able to find that kind of attachment?

Another question would be can the concrete be recycled as easy or is it easier

They probably should've used rebar chairs 🙄

From my point of view, that rebar is not in the middle of that slab. I don't think spacers were ever installed and its sitting on the bottom of it. Rebar must be installed in the middle of the slab to achieve maximum strength potential...correct?

@honeytubs

4 ай бұрын

Not really. Rebar helps concrete because it is good in tension. Placement of bar depends on the scenario.

As I knows, GFP Bars have more compressive & tensile strength than steelbars but having less bending strength than that. Thanks for this video. Am i right or wrong, if any can answer it ???

Not at all interesting that fiberglass rebar breaks when it bends that much. It is not what it was designed for.

Why is there not fiberglass and steel fiber rebar.

Total waste of that homeowner's money, because they negligently placed the rebar on the ground and poured the concrete over it. All of that rebar should have been at least 2" up into the slab, otherwise it offers zero reinforcement. Total waste of money just due to wrongful, lazy, and totally ineffective placement.

Why did the project happen? That driveway seems perfectly fine

Is this just a renovation or was there actually a problem with the slab?

@oxconcreteremovalfirewoodm3863

2 жыл бұрын

I'm a concrete removal contractor for a large concrete company here in Calgary. If the pour goes bad they call me in to remove it. Reasons why I come and remove the concrete in the past. Animals running through the concrete. New construction houses didn't have the gutters put up so the dripping off the roof ruined the finish. Concrete set to fast and bad finish. Warranty on the concrete ie flaking or sinking. The company I contract to pours lots of concrete through out the year. Mostly all new construction. I also find that when the dirt is disrupted in the winter it's not the same in the spring or summer. Meaning the ground settles differently.

It’s all mixed. Would I use it on everything. No Fpr. Steel. Epoxy Coated. I have ripped into 30-70-104 year old buildings the oldest I found 78 years old. None were the same so every project is specifically geared towards what you should use

There what is missing is the concrete... People says I tend to over charge my concrete slabs... And it does not break like this.... Use more cement and try again

yea but fiber glass doesnt rust

@brandonflowers8790

2 жыл бұрын

thats True

It appears that the bars are on 2-foot centers instead of 18 inch also like others said not designed for that type a failure. Please show more of your real life observations. Thank you for the video

Concrete guy never lifted the rebar up into the center during pouring. They really weren't doing anything in that pour.

That rebar wasn't working anyways, however pored the concrete they didn't pull the rebar 1/2 way up, It's flexible though lol

All this talk of rebar chairs when most driveways only have wire mesh with one continuous line of steel rebar along the outside. No one in my area uses chairs for a driveway.

i work for a large fiberglass rebar company for which im the warehouse manager in the sales office......Its good to see what it looks like after the fact. It would of been a whole lot harder if it was steel rebar

@oxconcreteremovalfirewoodm3863

2 жыл бұрын

I agree, there's lots of benefits that to fiberglass rebar. I definitely don't mind removing concrete that has fiberglass rebar in it. Makes my job alot faster not having to cut the steel rebar

@oxconcreteremovalfirewoodm3863

2 жыл бұрын

Watch this video I think you might like it kzread.info/dash/bejne/no2l3MZpc6TKqrg.html

@brandonflowers8790

2 жыл бұрын

@@oxconcreteremovalfirewoodm3863 Where are u located....Florida?

@oxconcreteremovalfirewoodm3863

2 жыл бұрын

@@brandonflowers8790 I'm in Canada, Calgary

@brandonflowers8790

2 жыл бұрын

@@oxconcreteremovalfirewoodm3863 our manufacture is in Thedford Mines #pulltall

I think it is fine for sidewalks and maybe slab-work on the inside, but it doesn't seem viable for footers and load bearing walls yet. The carbon fiber rebar may be a good contender for steel but its more than 10x expensive per piece!

@ashishgandhi5527

2 жыл бұрын

Using ACI 440 code one may use fiberglass rebar that is ASTM D7957 grade in footers and vertical applications like walls. Several DOTs specify fiberglass rebar in bridge constructions (OH, MN, Maine, FL, TX, OR, WA, SC, etc.) These need to be engineered/designed but there are prescriptive tables available from various suppliers like Owen's Corning's PINKBAR fiberglass rebar. **Disclaimer** I work for OC.

@bkucinschi

Жыл бұрын

@@ashishgandhi5527 : Hey Ashish, I need to use bend rebar for an ICF basement, and I understand this is not possible to do on-site. But does Owens-Corning produce/sell pre-bent rebar (#4 and #5)? I mean, L-shaped PINKBARS of minimum 2 ft or 3 ft on each arm? That would be enough to set together with a straight PINKBAR on 40d or rebar.

I think that concrete was doing less than the fiber glass. Poor quality new concrete poor. Really shows you why they were likely redoing the work. The only thing better than glass would be stainless steel.

awesome job great not impressed with fiberglass rebar seamed to break easy

@oxconcreteremovalfirewoodm3863

2 жыл бұрын

You might enjoy this video I just posted kzread.info/dash/bejne/no2l3MZpc6TKqrg.html

Well ots supposed to lol

Fiberglass rebar is junk it's good for boat ramps or something that's submerged in water and the trash can. Ductility is what is critical for reinforced concrete. And that can only be achieved when using Steel

The fiberglass has a chemical reaction the sec concrete hits it and it becomes one pice with the slab . cant split it like u can with the rebar