DIY Concrete (Mortar) Casting Mix - Basic

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When it comes to making concrete or mortar if you are buying preblended mixes then this is very convenient but you are certainly over paying for this convenience. You can make your own DIY concrete and mortar mixes by buying bags of cement and mixing them with aggregates like sand. This video looks at a common mix ratio for concrete (mortar) casting at 2 parts sharp sand to 1 part type normal/general use portland cement. This is just the first step in learning how to make your own casting mixes and once you have learned how to work with a simple 2:1 mix you can begin to explore more advanced techniques and admixtures.
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Опубликовано:

16 окт 2024

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Комментарии : 64

@jamesdutoit Год назад

I love your style and sense of humor. Thank you for the excellent lessons, too.

@creatingconcrete Год назад

I am happy you are enjoying the content!

@l0I0I0I0 2 года назад

I've seen people mix it on. Tarp. Seemed to work great for large amounts as well. They would manipulate the tarp to mix it well and fast.

@runningpluto1311 Месяц назад

Hi, thanks for your content. Are there more benefits with a 1:1 ratio? If we ditch the cost variable, is it a better mix for planters and small creations?

@ronzrolly8723 7 месяцев назад

Thanks man, this video helped me a lot. Greetings from Papua New Guinea

@matthysuys9084 2 месяца назад

I’ve been casting concrete pots for a while but I still get some pots that cracked inside the mold. My sement:sand ratio is 1:1 by volume. what can cause these pots to crack inside the mold?

@bowwowbnb 4 месяца назад

Where do you get your sharp sand? I’m having a hard time figuring what the best kind to get is!?! Love your videos!!!

@John-ou4rm 4 месяца назад

Builders merchants sell it by the bag.

@henryhull4456 Год назад

Your content is so helpful Thank you!! Could you tell me what brand of cement and sand you're using? What would you recommend for a casting thats a little bigger than a foot?

@creatingconcrete Год назад

portland cement, type normal / general use and clean, washed and graded masonry / brick sand. The kind without little stones in it.

@juanpanores 2 года назад

i love this videos!!! haha thanks you man! I 'd like a word of advise from you... i'm traying to cast some cement chess pieces on silicone molds, they will be custome made, a little bit bulky because i know cement isn't hard if the details are too fine, but is there a way that i can make it at least more resistant to chipping? In one of your videos you say PBA glue would make it harder, maybe try that?

@creatingconcrete 2 года назад

I would use more cement as opposed to PVA. I mean probably use the PVA also, but more cement content will help with additional strength resistance to chipping etc. You can just increase the cement content indefinitely until you are at full strength concrete really. I would also explore adding a HD foam core to lighten the finished product. This way you could use full strength mix but just have less of it.

@juanpanores 2 года назад

Thank you so much! I'll stick to pure cement then. I think i'll make them solid because I like the weight :) thanks a lot!

@heavenisalie 10 месяцев назад

If I need it thinner for a mold, how much super plasticizer would you add? Currently I’m using cement all non-shrink grout but it’s pricey and am looking to mix my own replacement

@creatingconcrete 10 месяцев назад

I would use as much as needed to achieve the placement viscocity I am needing. But trial and error is probably your best bet here.

@HWPcville 2 года назад

Thanks for your videos. I've just found your channel and am going thru them now. I would like to cast a sundial and could use some advice. If I create a positive mold from wood, could I create a negative with plaster, then pour cement into the plaster? Is there an easier way or a way that is more likely to success? Thanks!

@creatingconcrete 2 года назад

That process would work only one time, which maybe you are OK with, but I would take the original piece and pour urethane rubber on it. So no reverse molding or plaster needed. Just make the original piece, if you have one, and then put it in an OSB / melamine wood box, seal the edges with silicone and pour urethane over the whole thing. Mold making is deceptively complex. It takes a lot of practice in my opinion and lots of little nuanced steps...more than I can cover here. I will have this content on this channel eventually, but have not started with the mold making series' yet. Good luck with your project.

@matthewmillard9775 6 месяцев назад

If a person was to put cement in a plastic container to make molds what would he use so the cement wouldn't stick to the plastic container. Ty

@creatingconcrete 5 месяцев назад

When using a mold of any kind, you should use a some kind of a release agent. This could be a product specifically designed for this purpose, such as Smooth On Universal Mold Release, or a household product that can be used as a release agent. Here is a video about some mold release options - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3lhB7U9w94g.htmlsi=_WIxw23AVBhVH7Me

@p47arram Год назад

Hi Steave. I recently began watching your videos, they are fun with really good advice. In relation to mortar for small castings (planters), what sand grade would you recommend? 20/40 or finer sand (100) any good? Would finer compromise strength? Thank you!

@creatingconcrete 10 месяцев назад

Finer is better than coarser.

@khusboothapa1991 2 года назад

Can I use it to plaster my floors and walls for leveling... We dont have premixes at our place.

@creatingconcrete 2 года назад

No to use as a levelling mix it needs to be heavily modified with acrylic or latex. up to 50% of water content should be replaced with acrylic if you want something that will feather edge.

@khusboothapa1991 2 года назад

@@creatingconcrete thank you

@creatingconcrete 2 года назад

@@khusboothapa1991 I am happy this info was helpful for you. Cheers

@johnanthony7635 Год назад

Hi, very nice video. Could you please tell me if I would like to finished statue lighter in color, should I use more sand or less sand? Thank you.

@creatingconcrete Год назад

for lighter in color use more portland cement and give it a full 30 days to cure

@thebotanicalblueprint 8 месяцев назад

Hi, I'm learning loads here on this channel. I like to cast small and medium-sized planters using moulds. What kind of mix would you use? e.g. concrete or a mortar mix? The size of the rocks (aggregate) seems a bit big for the moulds.

@creatingconcrete 6 месяцев назад

For planters, a mortar mix is typically what I would use. As you pointed out, the rocks are usually too large as an aggregate. But it depends on the size of the planter you make and the finished look you are going for. For most casting projects, a mortar mix would be ideal to use, especially when considering the size of the piece. Here is a video about mortar mix for casting: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Q3SJi5PhxxE.htmlsi=d7LAUd2mMg0puy5v

@thebotanicalblueprint 6 месяцев назад

@@creatingconcretethank you!

@heidistauff1 Год назад

What’s the brand name of the sand? There are more than one that say sharp and they don’t look like your sand.

@creatingconcrete Год назад

I do not buy brands of sand. I buy bulk sands and you should as well. It is about 95% cheaper. Just walk up to the sand pile and look at it. If it has sticks, rocks etc that is wrong. If it has only pure sand, and all the sand looks basically the same size, that is probably the right stuff.

@zedzed8852 Год назад

It might be a good idea to pass the sand through a sieve before using it

@creatingconcrete Год назад

If the sand is questionable then definitely.

@edzu2771 2 года назад

I´ve seen others mix in pva white glue, do you know anything about that?

@creatingconcrete 2 года назад

Yes, PVA mixed in will help with strength as well. Replace 10% of the water content with PVA / glue.

@paulbolton7232 Год назад

Sbr is a lot better

@edzu2771 Год назад

@@paulbolton7232What is sbr?

@paulettebajangal Год назад

I was told to mix it until it looks like cake batter to pour into the molds? That looks a lot dryer than cake batter. Does it depend on what material the mold is made from? I will be using metal molds.

@creatingconcrete Год назад

unless you use a water reducer or super plasticizer the mix is too wet if it looks like cake batter. It will be compromised for strength. Use water reducer to get the same viscosity without compromising the strength

@paulettebajangal Год назад

@@creatingconcrete ok. Thanks

@awaazhoosein6565 9 месяцев назад

How much wheel barrow sand to 1 sack cement

@garth389 2 года назад

Can you please share specific volumes for the sand/concrete/water mix you used? Love the video

@creatingconcrete 2 года назад

3 parts sand to one part portland cement is my standard mix. 2 parts sand to one part cement makes a more creamy and cement rich mix which is better for fine detail casting. Both are very strong. The amount of water used is the minimum amount to achieve a consistent mix. Less is more when it comes to water. Too much will decrease the finished strength of the concrete.

@sirsmilesalotmore 8 месяцев назад

Probably do you well to mix it in a bowl? 🤔

@dorg99 Год назад

why didnt you use a bucket to mix everything ?

@creatingconcrete Год назад

This was just an example and I wanted the viewer to see it happen in front of their eyes. Typically I do all of my mixes in a bucket with a whip attachment for my drill.

@davidandral9698 Год назад

So can I cast with just mortar??? Been trying to google that question unsuccessfully

@creatingconcrete Год назад

Yes, absolutely. Most castings are done with mortar only unless it is a great big cast you are making.

@davidandral9698 Год назад

@@creatingconcrete thanks man. It will be pretty big so i should probably use concrete

@renyansanchez4830 Год назад

How much water did you pour in this mix?

@creatingconcrete Год назад

That was 500ml of water

@olivermiller5260 2 года назад

Is all purpose sand good for casting?

@creatingconcrete 2 года назад

it is better than play sand. did you see it? Was it all uniformly graded sand or is it little rocks of different sizes? With casting I prefer using brick sand which is uniformly graded, clean and washed sharp sand - not rounded or tumbled.

@alickdunbar 2 года назад

Is this sharp sand let me know please thanks

@creatingconcrete 2 года назад

Yes, specifically.

@cyrilallard6956 2 года назад

Hey, would this work with faux stone molds?

@creatingconcrete 2 года назад

Sure it would. I like using acrylic in the mix for anything that is intended for outdoors. Helps with resistance to water permeation.

@cyrilallard6956 2 года назад

@@creatingconcrete Awesome. Ty for reply! Liquid acrylic can be readily purchased at any home center, I'm assuming? Similar to liquid latex, just acrylic, yeah?

@johncaster8087 Год назад

Ha ha ha Great videos Thank you

@creatingconcrete Год назад

I am happy you enjoyed the content. Cheers.

@normbograham 8 месяцев назад

talk about impurities, I once found a hammer in a bag of gravel.

@joeconcrete5067 8 месяцев назад

Why didn’t you just put it all in a bucket and stir it and in two minutes than spend two hours playing around with it?

@josephbohme7917 Год назад

the idea that one would mix on the flat for any reason when a tumbling drum is right. Even a can on its side (closed lid) what do ewe learn from this. Un measured unless you use the ratios all the rime it should be 'a procedure' not a guess. This is even speeded up and it is a long time???