Concrete Polygons: Easy Shapes You Can Make at Home | Leitha Matz | Skillshare

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Concrete Polygons: Easy Shapes You Can Make at Home

teacher avatar Leitha Matz, Maker

Watch this class and thousands more

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Taught by industry leaders & working professionals
Topics include illustration, design, photography, and more

Watch this class and thousands more

Get unlimited access to every class
Taught by industry leaders & working professionals
Topics include illustration, design, photography, and more

Lessons in This Class

5 Lessons (10m)
    • 1. Here's what we're making...

    • 2. Concrete class getting started

    • 3. Mixing and pouring the concrete

    • 4. Finishing moves and more ideas

    • 5. Concrete polygons outro

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About This Class

Long before 3D Printing, people were "printing" forms out of metal, clay and concrete. In this class, we're going to play with casting simple shapes out of concrete. It's fun and easy. Once you get the hang of it, you'll want to start making all kinds of things out of concrete.

I'll show you how to pour concrete into geometric molds and create cool shapes that you can use for plant holders, candles, or maybe just a fun object to make your desk look stylish.

In no time at all, you can make some really cool-looking stuff to keep for yourself or give as gifts.

Meet Your Teacher

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Leitha Matz



I work as the head of product at a startup, but when I'm not at the office, I'm always making things of my own. I especially love illustrating, writing and design.

Here at Skillshare, I usually focus on creating classes in printing -- everything from stencils to woodblock.

I find printmaking inspiring because anyone can quickly start making successful prints with very few tools. It really opens the doors to producing a vision of your own on all kinds of materials: t-shirts, walls, stationery, stickers and so much more.

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1. Here's what we're making...: Hi. I'm late on by a few classes here at scale share on printing things on T shirts off walls on other surfaces. Today I'm going to talk about three D forms like this piece of concrete which creates a stand for my little friend Franz the blood. And he is kind of outgrowing this container. So I am going to print up a new one for him on way are going to give his old container to this little guy. Concrete planters are really hot right now, and you can find them actually on Amazon. People are charging between 25 35 bucks for them, or you could just make them yourself and then you can have the mold and you can make lots of them. You can see the examples here are showing that some of them are dipped and gold paint or they'll have a stripe of a particular color. There's lots of different shapes and heights on, so you could do a lot of experimentation. The polygons are what I'm going to show you today, but you can just as easily do squares or cylinders or more simple shapes. So I'm gonna show you how to pour concrete, How to create your own templates on. We're going to have a lot on the way. 2. Concrete class getting started: said. It gets started with this project. We're going to need a few supplies. The form that you see here is one that I purchased, which is already pre cut into a three D shape template. You can also download three D shape templates online, and these are pretty common with elementary school teachers for showing kids how to do, for example, a dodecahedron or a pyramid or Rumbek prison. These kinds of shapes can also be pretty interesting for concrete moulds. You can make your own actually out of either cut out plastic or of card stock that you would then cover in a plastic leg, contact paper or tape to make it a little more water resistant. You'll also need a work surface. You'll need some concrete material. I'm using one called Crea Stone, but Quikrete is a very common one in the United States. If you're doing something like a plant holder, you'll need some wire. I'd recommend kind of a medium gauge. The first wire that I chose was a little bit light for this, so I needed to use something more durable. A couple of tools can help you cut and shape the wire so I've got some cutters. Onda, needle nose pliers. Here. Popsicle sticks are great to help keep any inserts in place in the concrete while it dries . Stones or coins are going to be really useful for you. If you're putting, for example, a container inside another container, because the inner container is going to want a float up and I'll show you how that happens in the next episode. 3. Mixing and pouring the concrete: Once you have the necessary supplies, you can start constructing everything and we'll get pouring that concrete So you can see here that I am taping my plastic form and I'll be really careful as I put the tape on the form so that I haven't even meeting of all the joints. Now that this is ready, I could make sure that I have together anything else that I'm going to be inserting into the concrete like this spiral of wire. So because this is going to be a plant container, I'm going to make this wire spiral with a larger loop on top and then a smaller loop on the bottom just to give some stability to the wire inside the form. Now we'll go to the sink, and I'm gonna measure out the concrete crea stone into my mixing bowl. You actually need quite a bit more material than you might think. I used to full containers of the form to do the mixing. I've added the water. Crea Stone recommends a 10 to 1 ratio of water to stone, and you just mix this up. What you see here is actually a bit wet, so I might add a little more to the bull to make it thicker. When you concrete is ready, make sure you're using work surface. That is why people pour it into the form. I'm just gonna test the placement of my votive candle here in the form and you can see it's gonna float up a little bit. I'm gonna fill the rest of the form with concrete, and then I will place the vote of candle the final time and make sure it's stable. I weigh it down with a rock on a Popsicle stick, and I take that in place just to be sure. One more thing before you let it dry make sure that you tap it several times to get as many air bubbles out as possible. Unless you really like the arable look for this form, I'm going to insert the wire in place. So I've created a little raft of Popsicle sticks and a punctured hole in the tape where my wire is going to go right there and I'll take that in place and you can see this one is also ready for drying. It will be about 24 hours before it firms up with my yogurt form, I'm going to push in. Place that smaller container again, using a Popsicle stick toe. Hold it down after its centered and you can't quite see here. But this cup is full of pennies, which I'm using to weigh down the interior container. And, of course, the last step is to make sure you clean up everything right away. You don't want concrete getting solid on your household goods after 24 to 48 hours, depending on how damp your environment is, You can take the bold off of the form you can see. The concrete isn't quite dry yet. When it's fully dry, it will be a lighter gray color. But I'm going toe. Unmold the form and you can see it's looking pretty good. There are a few little areas that I'll probably want to sand, and after I extract the metal container, the candle fits right in place. 4. Finishing moves and more ideas: Now we've made a few different projects, but this is just the tip of the iceberg on what can be done with concrete forms. So you can see here that we've made a candleholder and ah, small planter. And then, of course, there are the two larger planters with the wire for the air plants. But this is small material. You can use concrete to make things of a much larger size. So on the Pinterest page that I've created here with concrete planters, you can see that there is a wide variety of shape of size, color and finish and of material insert this'll. Example. Here is a leaf that is gilded and then pressed into the concrete. Here you see stencils on image transfers. You can also do gold paint dipping, and there's a lot that could be done with the display afterward. For example, this hanging rope set up. They also look really nice when displayed in groups. As long as you have a large enough form, you can make concrete containers of a very large size, and so you might want to do this for a patio, or, if you have a balcony to use, keep in mind that concrete may attract moss, so you might want to finish your materials with, ah, lacquer or paint, just to make sure there's as much of a seal as possible. Here. You see that somebody has taken broken tile and pushed it into the side of a pot, and that's a really good way to do decorations as well. You can also use coins or small stones or other little objects that you can press into the concrete as it's drying. Other ideas looked through your trash. What do you see there? Do you have milk cartons, juice bottles, deli salad containers or maybe stuff from your last take out order? If it's made of plastic or foam, it's really easy to just oil it a little bit. Throw some concrete in there, let it dry and see what kind of shape you get. I hope this gives you a little more inspiration on what else you can do with concrete. Consider other things in your house like pencil holders, maybe doorstops, paperweights, ashtrays. You could make patio tiles and even things like jewelry. Concrete is actually quite flexible 5. Concrete polygons outro: so you can see without a lot of time or effort here. I've got some really cool forms. Here's my candle. Gonna use some sandpaper on the edges here, But this is gonna be really need. There is a small pot here that I think I could put a practice that's gonna be really nice. This was from the yogurt containers. Here's our polygon. That grounds is going to live in now. So this is a really kind of a fun, simple project that you could do to make some interesting things for our house or gifts or whatever. And you can make your own templates, of course, or your own designs. So I hope you do some experimentation and have a lot of fun with this. If you post a project in the project area, I would love to see what you're working on on a happy casting