GFRC Explained - Learn the Basics of GFRC

[@daleferrier3050]

I am at a company that's been doing GRP for over 30 years, and we are wanting to branch out into GRC. There's a ton of info out there, but nothing so far has so clearly walked me through the process and the materials needed as this video has. Very informative, clear, and concise. Thanks guys.

[@smoothon]

Thanks for watching, and don't forget to subscribe!

[@kareemalselawy1941]

Hi mr dale i was just looking through the internet trying to find an answer for a question untill i came across your comment My question is, is GFRP usable in concrete slabs as a complete replacement of steel slabs that aren't rested on a ground beneath it say the slab of a 2nd floor

[@reedsawyer5704]

I just wanted to congratulate you on the video quality of this piece. First of all, the lower thirds information is extremely well done. Every time that a piece of information is flashed onto the lower thirds of the screen, it is relevant, easy to read, and allows you to go back later and find the referent materials. Secondly, the video production is high quality. The sound and video are crisp and there is no background noise. (A competitor always has terrible sound quality, and they have a radio playing in the background.) Thirdly, the information is very technical, but it is explained in such a way that even a nocie can follow along. Great job.

[@smoothon]

Thanks for watching and the nice words!

[@deyc3]

Reed Sawyer, I agree. It's really a great video.

[@VeganRashad]

Reed Sawyer Well put. This video was extremely well done, the lighting, the sound, the slides and mist importantly the information.

[@smoothon]

+Rashad Glover thanks for the kind words, and thank you for watching!

[@rondamylove9995]

Wow, this took me from completely clueless to now have a clear road to follow in my learning journey. Thanks so much for the clarity as well as the completeness with explanation of each component and step. Next time I'll focus on proper mold prep. Ordering my materials now.

[@smoothon]

Thanks for watching, and don't forget to subscribe!

[@DavidGuyton]

This is excellent information. I am doing a much simpler project that doesn't require this level of materials, but I definitely learned a lot here and it was extremely helpful.

[@smoothon]

Glad it was helpful!

[@Dented_Battle_Armor]

I am a company doing FRP. Gonna go into GFRC. GREAT VID

[@smoothon]

Thanks for watching!

[@raymondswilson2012]

Adam is a great instructor. He makes learning fun.

[@smoothon]

Thanks Raymond, we will let Adam know you commented. Thanks for watching!

[@wilsonray2010]

Great video.This is one of the best on the subject.Thank you.

[@smoothon]

+wilsonray2010 thank you for watching

[@DINHVANTAM-QTRI]

Wish everyone stay safe. I do sculpture in Vietnam 🇻🇳 😍😍

[@projectsbuildplus-gmc9265]

This is very useful video for Applicators & Site Engineers -Technicians. It is very Informative- Actual/Practical Demonstration - How to make - advantages & Functions of different ingredients .Very Scientific and handy kit- highly recommended for site technicians. Pankaj Vyas GULF MINERALS & CHEMICALS LLC

[@essamadel874]

Really Thanks for this great verification and explanation. For me this is the first time I know about how GRC can be made, and I got every single info that you had verified. Really Thanks Greetings from EGYPT

[@smoothon]

Glad it was helpful!

[@archreyona]

An enhanced concrete over conventional rc we knew, great video well explained👍🇵🇭

[@MrInnovativeEnergy]

I'll try it with CSA cement since it's hydrophobic, 4000psi in 4 hours, far better bond to most materials. Having really good luck with CSA for the past few years, should work good in this application.

[@johnanderson8096]

That was nothing short of outstanding... Thank you

[@smoothon]

Very welcome

[@homesweet5369]

This is very detailed video great people very educated thank you for your video

[@smoothon]

Thank you for watching!

[@wns1212]

Very informative video...thank you for sharing

[@smoothon]

Glad it was helpful!

[@mikeparsons491]

Great , general ,informative video, thanks guys.

[@smoothon]

Thank you for watching! Don't forget to subscribe!

[@fasikamelkamu3318]

Thank you so much for Such great explanation . Thanks again

[@TheHandystanley]

I got a project coming up that I will need to speak to someone about. Great job!

[@smoothon]

Call us at 1-800-381-1733 or contact us here www.smooth-on.com/support/ticket/add/agree/

[@10knucklechuckle]

I believe you can usually find silica sand at pool and hot tub suppliers as it is used in the filters...

[@julekszczawinski9834]

Great video: We based in Dubai and we have an F&B interiour fitout company. Due to the crises we are experiencing I'm seriously thinking of slowly moving away from our core business of F & B interiors to producing custom concrete furniture and countertops. I have a lot more studying to do and if you have any tips on how to start this kind of business it would really help..

[@smoothon]

Hi there! This is a good question for our tech support team, can you send them a ticket here? www.smooth-on.com/support/ticket/add/agree/ Thanks for watching!

[@AndrewHelgeCox]

Just facts banged out one after another. Awesome primer.

[@smoothon]

Thanks for watching Andrew, and don't forget to subscribe!

[@AndrewHelgeCox]

@@smoothon Done it now!

[@OldePhart]

This was really good info - going to go look if you have any concrete sink specific information next since that's my project. Thanks guys !

[@mymatemartin]

Great video guys. Very informative

[@IntensityInTenCitiez]

This was a great introduction/informative video! Ready to start designing GFRC cladding panels!

[@smoothon]

Thank you for watching! Don't forget to subscribe!

[@MsRuell]

Thanks guys, very informative!

[@smoothon]

Thank you for watching!

[@georgesanchez9971]

Excellent video. Very well made. Thank you for educating us in the principals of GFRC.

[@smoothon]

Thank you for watching! Don't forget to subscribe.

[@justinjohnsen8555]

Great Video. Very informative. I like the graphic text to help reinforce the message, but all the sound effects on the graphics/transitions are Really distracting. Please consider this when editing future videos. Thanks again.

[@smoothon]

Thanks for the input Justin. We'll take that into consideration.

[@goodbyemr.anderson5065]

Two years later and youre still a whinny bitch.

[@GreyElement]

very informative. thanks for the video!

[@smoothon]

Thank you for watching!

[@mutlumutlu8203]

Thanks for the explanations.Really great video..

[@smoothon]

Thank you for watching! Don't forget to subscribe!

[@deyc3]

I regret that I have but one "like" to give.😁

[@manetanedareason9759]

Thanks.....ive been doing gfrc for just a little while....and its going good...nice vid #appreciated

[@rajmohammed409]

Very informative thank you

[@smoothon]

You are very welcome. Thanks for watching.

[@BrandonToy]

Man, this was really great. I’m considering using GRRC to build some speaker baffles. Any tips for changing the acoustic properties of the material?

[@smoothon]

Hi there! You aren't going to be able to change the properties of the materials however the design that you use for the model could help to increase to sound quality. This is a good question for our tech support team, can you send them a ticket here? www.smooth-on.com/support/ticket/add/agree/ Thanks for watching!

[@dsv2889]

thank so much Mr ADAM and Mr KEVIN vrey good veideo

[@smoothon]

Thanks for watching!

[@smoothon]

Thanks for watching.

[@fishbonetrunk6645]

I hoped they talk about the ceiling ornament in the background which is molded from gothic tin or copper ceiling plate.

[@skimovski69]

Thank you,

[@smoothon]

Thank you for watching! Don't forget to subscribe!

[@semidemiurge]

excellent, thanks for your thoroughness

[@smoothon]

Thanks for watching!

[@zuheirsawalha874]

Great and informative video....thank you

[@smoothon]

Thanks for watching, and don't forget to subscribe for more how-to videos!

[@albertdesalvo7273]

This technical video is very informative and interesting. Voted & Sub'd.

[@smoothon]

Thanks Albert!

[@minkyu00915]

thanks for great video, it was very instructive and informative

[@smoothon]

Thank you for watching!

[@fzlyanbu5374]

EXCELLENT INFORMATIVE VIDEO -BUT I NEED TO LEARN MORE

[@smoothon]

You can always reach out to our concrete team here: www.smooth-on.com/applications/concrete-casting/

[@michelevitarelli]

Great video. Thanks for sharing.

[@scorpionsbornleader8953]

Please tell about the adhesive used at joints

[@smoothon]

Can you send us a tech ticket? Our team can help you - www.smooth-on.com/support/ticket/add/agree/

[@yamiah03]

Thank you 🙏 very much. Very informative.

[@smoothon]

Thanks for watching, and don't forget to subscribe!

[@Grizbox]

Thanks for this. Great vid.

[@smoothon]

Glad you liked it!

[@markvincentcocjin]

I'd like some advice on my spiral staircase design. It's a helical stair and is only attached from the first step and the last step to their respective floor slabs. I would like to make modular GRC moulds for the poured in concrete. With the exception of the tread, it will serve as the finish itself. I know it's going to sound complicated, but that's the design intent. I would like the modules to be really light enough to handle but strong enough to serve as the external surface. This is why I thought of GRC.

[@smoothon]

Hi there! This is a good question for our tech support team, can you send them a ticket here? www.smooth-on.com/support/ticket/add/agree/ Thanks for watching!

[@muradinteriorsofficial375]

NICE VIDEO

[@smoothon]

Thanks for the visit

[@hamidrezar1040]

hi buddy. Can you explain a bit about 20 mesh sand?(to metric unit)...... i want to know that approximately how much of Fine grains (in 20 mesh sand) are between 0.8mm until 0.5mm--0.5mm until 0.2mm and how much under 0.2mm

[@johnpaultyrrell3164]

I'm from IRELAND and I have worked on concrete pumps for more than 20 years. would love to learn more about this and how i could use the concrete that i have left in the hopper and have to dump

[@smoothon]

Give us a call at 1-800-381-1733 and we can help.

[@questconcrete]

John Paul TYRRELL you couldn’t use that concrete to do anything like this. But you could definitely have some molds ready to go. Sidewalk blocks, curb stops, etc. Smooth-on could certainly help you in that department. I used their products to make concrete stamps years ago. I now have stamps nobody in the entire world has.

[@kadampavan]

Very informative thanks👍

[@smoothon]

Thank you for watching!

[@user-vn6hi2bi3g]

How do you feel about not adding plasticizer to keep added strength? Using basalt mesh and fibers in place of fiber glass? Do you ever recomend silca fume if so when and how much? I do counter tops and need to be able to use thin castings about 1" 25mm most times and have sections that cantilever out from support. Thanks Ray Stormont

[@smoothon]

There are infinite variations available for concrete mix designs. All of the items you describe are potentially viable, but must work in concert with the rest of the mix to make a good final product. We typically recommend plasticizers as a way to keep the water to a minimum, which in turn increases the strength of the concrete. We do not have specific recommendations for basalt fibers or silica fume. 25 mm thickness is common with a high strength mix design - focus on proper placement of reinforcement in the plane of tension. If you have further questions you can reach out to our tech support team. www.smooth-on.com/support/ticket/add/agree/

[@ajmckay2]

Super helpful video. Thank you!

[@smoothon]

Thank you for watching!

[@huateknewmaterialinc.2086]

I like your vedio very much, it explains very good.

[@smoothon]

Thank you for watching!

[@gerd_music3099]

Hey, great Video!! Thx for all this good Information. I have one Question: Wich nozzle-diameter is the best for spraying this material?

[@FilmFactry]

Excellent info!!

[@smoothon]

Thank you for watching!

[@SPINEB7]

Thanks for making this video, it helped allot.

[@smoothon]

Thank you for watching!

[@hamidrezar1040]

hi. can we use portland type II or type V and why?

[@mukhalladmurad6877]

Dear Sir When we calculate the glass output in g/m How can this value its suitable or no

[@user-vc5rp7nf8f]

thanks

[@patrickeh696]

I prefer BFRC due to superior strength, density similarity to concrete.

[@jamesjames4059]

Sir will you please make a video on how to make translucent concrete

[@gerhardvanniekerk7485]

Great video thanks. Just a quick question. In a premix design, when it say the fibre glass should be 3% of the entire mix - is that 3% of the dry components in weight, or 3% of the dry and wet components combined? Please let me know.

[@smoothon]

Thanks for watching! The measurement is 3% by weight of the total mixed system, including all dry and wet components.

[@LouisFPak]

Is GFRC suitable for “Faux Bois” ….pushing into mesh and carving?

[@smoothon]

The Buddy Rhodes Vertical Mix is more suited towards carving in place: www.buddyrhodes.com/buddy-rhodes-vertical-mixtm

[@gersonflores8920]

I like the product easy to use

[@Jer0m3]

Excellent video. How much is the specific weight of these mixes? (like kilogram per liter or the American equivalent). And maybe you also know the specific weight once cured.

[@jensfredgaard2590]

Great video! I can only seem to find the FORTON VF-812 here in Europe, not the VF-774. Where can i buy this from? Would also like to buy the AquaCon product.

[@industrialsales878]

You guy's Rock. We would love to have you test our Products. How can we do so ?

[@smoothon]

Conctact us online at smooth-on.com

[@IbrahimHmidan]

Great video and channel!!

[@alexlongpre4527]

Very interesting.Istumbled upon your video whiledoing my research for my concrete countertop. I had one quick question, since I don't have equipment to spray. Can the glass fiber be added to a pourable mix? Thanks in advance. Regards, Alex.

[@smoothon]

Absolutely - contact our concrete group for mix designs - www.smooth-on.com/support/ticket/add/agree/

[@dvillageidiot3899]

Do superplasticizers reduce or increase strength at all?

[@Noorstud]

Great and informative video. Why the sand is used ? Can I get rid of it ?

[@smoothon]

Without the sand, the mix would have no aggregate and would be brittle.

[@Noorstud]

In all projects types, should the sand be equal, greater or less than the cement ?

[@jesusfernandez7]

Where can I buy the FORTON Additives in Costa Rica 🇨🇷..???

[@smoothon]

Thanks for watching @jesusfernandez7. You can find a full list of Smooth-On distributors here - www.smooth-on.com/distributors/

[@gonzalopmolina]

Thank you for the video. About glass fibers, I have a question. I have acces to 12 mm glass fibers, and 50 mm glass fibers. Which one is better for GFRC countertops, tables, and precast concrete forms? Always around 3% of cementicious. Do you recommend a mix of short and long fibers? Thank you for your support!

[@smoothon]

Hi there! This is a good question for our tech support team, can you send them a ticket here? www.smooth-on.com/support/ticket/add/agree/ Thanks for watching!

[@ReedBurch]

Great video. Is there an advantage of AR glass over basalt fiber? Literature indicates there is a tighter bond between basal fiber and cement and that it is inert with regard to alkaline environments. What are your comments?

[@smoothon]

Hi Reed, this would be best answered by our concrete tech team. Could you submit a ticket to them here? www.smooth-on.com/support/ticket/add/agree/

[@KeilCas]

Did you find an answer?

[@larsjensen8467]

hello. excellent explanation guys. I've startet making concrete tables and have been doing it for about a year. Now I want to start doing spray up tables. I have the most ingredients but can't find AR glasfiber near me. Do you now where it's possible to purchase? I live in Denmark, so a place near me will be best

[@baflange6477]

Lars Jensen not needed imo unless doing very specific big job with wierd stresses being put certain places and angles of the slab

[@utkarshbarange203]

What happens when we use fines small particles river sand In India locally we get river sand We can use fine river sand or not in grc

[@smoothon]

Can you contact our tech support department? Thay can assist you. www.buddyrhodes.com/contact-support

[@dariuszkedzierski4384]

Hello. The amount of plasticizer relates to what unit 1 pound of cement, 1 kilogram of cement,?

[@smoothon]

Can you send us a tech ticket? Our team can help you - www.smooth-on.com/support/ticket/add/agree/

[@zarchitect1808]

Hello, what do you think about jesmonite? Can you compare with gfrc? I couldn't decide which one would be best for my job.

[@smoothon]

Can you send us a tech ticket? Our team can help you - www.smooth-on.com/support/ticket/add/agree/

[@spasapane]

Can you use GFRC and VF-774 with Rapid Set Cement-all? Or is it really just for Portland Cement?

[@rubennavegante3491]

Thanks

[@samisum8888]

I am interested in using your GFRC mix to build a Ferro cement hull type boat ... do you have any experience with this application ... saltwater immersion etc.

[@taidelek9994]

Is grc application appropriate for detail art ?

[@smoothon]

It definitely can be when applied correctly.

[@manuelvillalpando6665]

Great and informative video. Why is that GFRC as well as some of the other products mentioned on this video is hard to find here in the US? I've tried searching for them on a few places here in Yuma, AZ but can't seem to find a local hardware store that carries them. Does they go by a different name brands here in USA? Thanks again for the video.

[@baflange6477]

Manuel Villalpando well for one thing they are talking about using the best of the best on every single ingredient.. I can tell you even on union Crete jobs we don't worry about stuff but maybe 30% of what they mention... for instance for almost all jobs ANY type of fiber glass is sufficient... also I've never in my 20 years seen a concrete company that delivers us finishers concrete that includes actual potable water. Sand also is very rarely an issue even when shooting of a gun. If you're doing DIY stuff you can probably just ask around local tradesmen and workers at hardware store... even just read the instructions on the bag of cement in the store

[@antd8667]

Same here in Calif also looking for uhpc none around one place but u got to by it by the ton

[@nishthajain8394]

Very informative . I wanted to make a stool with the help of GFRC, is it necessary to add acrylic polymer to it? as it is hard for me to source it in Hyderabad, India

[@smoothon]

Yes, the polymer is a key component of the system.

[@marchelandersen6839]

could you use basalt instead of AR-glas?

[@justinbarney6286]

I live in Myrtle Beach, SC and I'm installing an addition to my present driveway. My current driveway is about 600 sq. ft. and the addition is adding another 800 sq. ft. for a total 1400 sq. ft. Also the depth of the addition is 12 inches. Now when I say I'm living in MBSC, I don't live directly on the sand, I'm more in-land, but there's still a sand/soil-mix. Given your Premix formula, would that be appropriate given what I'm wanting to achieve, or would you suggest something else?

[@smoothon]

Hi Justin, it would be best if you discussed this with our concrete casting team - they can be contacted at www.smooth-on.com/support/ticket/add/agree/

[@nasserhaq6057]

hi the big problem here is : if you want to build a beautiful decoration house you need a way to design a molds for these decorations while the shape of these decorations is not existed only on the map of this house so what is the way to solve this problem ( if you have a shape you can make a mold) thanks

[@baflange6477]

Nasser Haq sounds like you need help from someone with maybe artistic background... I've worked on many concrete crews but never asked to make custom molds... if anything we'd just go to a vendor that makes concrete yard statues/decorations

[@KonkelVonk]

Will this work with aerated concrete?

[@walkertongdee]

Too bad we can't get portland in my country I would like to do this.

[@lollytrolly5123]

is it good for bunker?

[@tacotac10]

Can GFRC bond to foam core/XPS/EPS? I am looking for strength and durability added to the foam, yet maintain a rough texture of cement to make look like a rock.

[@smoothon]

Buddy Rhodes offers a concrete product specifically designed for this - www.buddyrhodes.com/buddy-rhodes-vertical-mix

[@eddiezakaryan7644]

I am interested in your product vf744. Where can i Buy it? Also in the video you have a table with amounts of each material, but there is no units. When you say: 100 Portland Cement, 85 Silica, 24 Water, 10 VF774. Do these numbers mean volume? Can you please explain? Thanks!

[@smoothon]

Thanks for watching! A full distributor list can be found here: www.smooth-on.com/distributors/ The numbers are by weight.

[@pantsharad]

Can we use rice husk in palce of glass fibre??🙄

[@smoothon]

You would have to test that for strength and compatibility.

[@royalfolkspark]

What Portland mix can I buy for small 7-inch cement vytaflex molds ?

[@smoothon]

Can you send us a tech ticket? Our team can help you - www.smooth-on.com/support/ticket/add/agree/

[@kganeshk91]

what is the difference between GFRG vs GFRC?

[@stratobee]

In your "recipe" it say the spray-up has fiberglass in it, but that doesn't seem to be the case when I see in other videos how they spray it on with only a hopper spray gun. Also, if they spray-up mix has more GF in it, how come it looks thinner than the pre-mix and seems to be sprayable at all? I would imagine a slurry with more GF in it, would be less sprayable than one with less? Sorry, just confused. Can you clarify?

[@smoothon]

Thank you for the comment. It is a bit of a misnomer because the facecoat for both method is typically sprayed onto the surface. In fact, Spray-up and Premix are made with the same steps in that there is a face coat and backer mix applied sequentially. The difference is that with a backer mix in a Spray-Up application, the AR fiber is not preblended into the slurry. Instead, the AR fiber is added when the slurry is exiting the spray gun head - there is a separate chopper gun that cuts and incorporates the AR glass roving into the stream of slurry as it exits the gun. This is how you get a higher fiber content - it isn't mixed into the slurry from the beginning, and more can be incorporated at the gun head (usually 5% load of fiber by weight of the system). This video shows the spray-up method in detail: kzbin.info/www/bejne/f6jNnJJngNhosKs Hopper guns are primarily used to apply the face coat mix in a Premix method. There is no fiber in a face coat mix. The standard hopper gun you see in most videos cannot spray slurry with AR fiber mixed in. When the AR fiber is premixed into the slurry is it typically applied by hand, but there are specific pieces of equipment that can spray Premix backer. Usually you are limited to up to 3% load of fiber by weight of the system in a Premix application - beyond that and it simply becomes too thick to be workable. I hope this helps!

[@stratobee]

Thank you for explanation. So for home, or lo-fi use where we don't have access to such spray guns that can mix AR, you suggest doing a spray-on mix with no fibre and then add a little bit of AR fibre manually at back and then add the premix after that?

[@smoothon]

You would spray 1-2 layers of face mix (no fiber) with a hopper gun. We prefer 2 layers, while lightly brushing the backside in between. Let that sit for 30-40 minutes until it hazes and becomes a bit stiffer. Then mix more material with 3% glass fiber added and apply that by hand in 2-3 layers. Ultimate thickness should be 3/4"-1" thick. Here's a good process to follow: kzbin.info/www/bejne/lXXOeYqCp9yNidkm18s

[@veronicabarajas8106]

Can it be poured into a mold?

[@smoothon]

Generally a spray detail coat is applied first, then the remainder can be poured.

[@hardford1]

can it be cut and engraved easily with cnc router (tungsten carbide bit )?

[@smoothon]

You would have to test this, but it would perform similarly to standard concrete.

[@simonac688.]

Excelent tutorial ...(sub)

[@smoothon]

Thank you for watching!

[@tamaskovacs8074]

Why dont you use any type of puccolans in your mixes?

[@RockMironov]

Tamas Kovacs for example metacaolins

[@tamaskovacs8074]

@@RockMironov Metacaolin affects flowability in a bad way because of it's shape. Fly ash is good round shaped, but has a black color, Silica fume has round shape + white color, but hard to buy :(