Basic Refractory Concrete Mix

This video shows a basic refractory concrete mix and it's application to a home made pizza oven. Mix ratios at the end of the video.
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[@sheilam4964]

Thanks for the update on what you are now doing on the Pizza Oven. Looking forward to the results report. 😁 👍👍👍👍👍

[@prattait7594]

You have to love this channel ! 🌟🌟🌟🌟🌟

[@DaMalat]

Thanks for the great comment, very much appreciated.

[@linakoh4206]

Hi and thank you for sharing your tips .. this is great esp for an over used oven .. take care and keep safe 👍🏻😷

[@DaMalat]

Thank you

[@jimbop4499]

Reminds me years ago benching manholes lol. Trowel it up 3-4 times...bringing the fat to the surface. I used to cover with wet hessian ...cement was set enough not to get marked. I admire your resilience in this oven making malarkey lol........hard work!

[@DaMalat]

Thanks, much appreciated

[@harpo187bling]

Looking well pal.

[@DaMalat]

Thank you

[@mrhodeifa7449]

Can we use the mix for brick installation instead of refractory mortar?

[@mikydusek5246]

Can I ask a question ? I did a render with this mix, after a week of wet drying i left it for one more and after that many tiny cracks occured on the whole surface.. what did I do wrong please ? Thank you

[@charlier8753]

Do you think you could just use this mix instead of the perlite and cement? I’m thinking of making the exercise ball form but putting high walls around it and pour?

[@nakmic9368]

So rectangular oven cant work? Beautiful work.

[@zaindweik1928]

What is the final portions? Did it work out ( no cracks )

[@StanleyD001]

How much Fireclay goes into the mix? I'm going to be redoing my oven this weekend and I don't want to screw the ratio's up?

[@user-tg1bo7ee3r]

Hi am.planing to make bbq qanted to ask can this morter be used foe inner walls to lay beicka and is this heat resistant or is this only for exterioe walls? Please could uou let me.know v appreciated

[@quantumofconscience6538]

Yes, Calcium ALUMINATE cement is the key. NOT Calcium Sulfo-Aluminate quick setup.

[@olegpoheretski190]

Как избежать трещин при нагреве?

[@jeffp7776]

5:1 vermiculite to Portland is way more efficient than the aircreet and a whole lot easier. There is no need for a heatproof mix over the insulation layer when using the vermiculite or refratory insulation. Your getting a tremendous amount of heat transfer with the aircreet and very little insulation value. Also mixing calcium aluminate with lime accelerates the mixture very rapidly too rapidly and drastically reduces its strength. It's best to use portland instead.

[@bosu626]

So are you saying 5 part of Vermiculite to 1 part of Portland cement?

[@M_0NKE]

Could you use this refractory cement to make the vermiculite concrete mix instead of the portland cement?

[@DaMalat]

Yes. A lot more expensive but a big step up in structural integrity as far as the ability to withstand high heat is concerned.

[@M_0NKE]

Do you use same ratio as the portland cement?

[@DaMalat]

@@M_0NKE Yes but make sure you're using actual cement powder and not a refractory mix. Some sellers mix expensive cement, high in calcium aluminate with washed river sand but still brand it as cement.

[@M_0NKE]

Sorry could be expensive mistake if I get it wrong. To clarify, I make your basic refractory mix and add 2 parts of that mix to 5 parts vermiculite (or perlite) and then add 2 to 2.5 water to get right consistency.

[@DaMalat]

@@M_0NKE yes.

[@donblack541]

Make a brick with 3 layers. That's what I was thinking of trying 🤔

[@jonnytunanotts]

did I miss the part where the ratio/amount of fireclay was stated?

[@smullin9]

No. It was not stated.

[@ConcreteLand]

Yes you did miss it. Twice actually

[@roger7163]

2:41

[@mdryfly6450]

As a 35 year refractory masonry specialist, now retired, this is one of the poorest jobs of laying brick that I've ever seen. 2 inch+ wide joints instead of cut bricks? Just no. This project will self destruct within a few years. Guaranteed. This guy wouldn't last more than a day or two on any job doing work this poor. Not trying to be ignorant or disrespectful, just stating the truth about the one thing in the world that I am the most skilled and knowledgeable about. This is done wrong...entirely. Typically one would not be making their own bonding mix, it is very specific to the composition of the type of masonry unit being used, they are not even a little bit interchangeable. In every job I've even been on it was supplied premixed and ready to use in buckets. Typically it is liquid enough that a trowel cannot be used, a laddle is used. Never seen 'homeade' used at all and would not try it.