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Picture of Concrete Fingerboard Skate Park
This is a super simple project that has been a huge hit. Here's a quick overview. Check it.

Our nephew wanted a TechDeck half-pipe for his birthday this year. We thought we'd kick it up and build him his very own real concrete fingerboard bowl park. The goal was to create a unique park from materials we had on hand. At 60 lbs., this park weighs a wee bit more than our nephew.

Materials:
tub/form (we used scrap 3/4" plywood and spray glued some plastic film to it)
bowl(s)
caulking
styrofoam
ready-mix concrete
spray silicone or some type of mold release
and of course, duct tape
 
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Step 1: 1. Create the form

Picture of 1. Create the form
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Create a negative mold of your desired park shape.

We built a tub from scrap 3/4 plywood and spray glued some plastic film to it. To create the bowl shapes, we used 1 larger wooden bowl and 2 smaller glass bowls. The transitions/gaps where shaped from a few chunks of styrofoam and duct tape.

Note: The mold needs to be smooth, so the concrete can release when cured.

We used caulking to make smooth transitions and rounded corners. Use your finger and a little water to smooth out generous beads/globs of caulking. Let the caulking dry overnight before pouring concrete.

Step 2: 2. Pour Concrete

Mix and pour the ready-mix concrete.

We used a full 60lb. bag of basic post concrete mix since we had that on hand. It worked ok, but cracked because the form was too thin (specs state minimum of 2" thick). The trick to a smooth final finish to knock all of the air bubbles out. We tamped everything well with a small stick. Then we beat on the outside of the form with a hammer. You will see the bubbles rise to the surface. Let sit for at least 24 hours. (we rushed it and cracked the main bowl. as an easy fix, we glued the pieces to plywood with liquid nailsback in business)

Step 3: 3. Remove form

Picture of 3. Remove form
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Carefully remove your form. If you have any cracks or bubbles, fill with non-sanded grout or other concrete patch/filler.

Add the finishing details like:
-stickers
-coping
-rails
-extensions
-etc

Step 4: 4. Shred!

Picture of 4. Shred!
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"Cannon Ball Park" in action:

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that is for play with Beyblades YA-HA!!!!
peterthomsen (author)  danx_the_drummer2 years ago
that's a great idea! thanks.
Very good job, Nice deck!
reref3 years ago
Nice one. Five stars!
did you make the banana board tech deck or buy it? plz respond
peterthomsen (author)  dylankunaikennedy3 years ago
it was purchased
where and how much?
target/ toys r us for like $5 but idk if they still carry them
peterthomsen (author)  dylankunaikennedy3 years ago
sorry I don't know. it is my nephew's.
o ok thanks anyway
Sakrete4 years ago
Excellent Instructable. Great choice of Concrete :)
awsome looooool
splatman4 years ago
Reinforcing it with mesh would help. Use poultry netting or hardware cloth, shaped to follow the contours on top. When pouring the concrete, make sure the mesh/netting is not in contact w/ the mold, so it won't show in the finished product.
Another layer of mesh along the bottom, and/or some rods, to reinforce it from the bottom as well.
One way to use less 'crete, (and make it lighter too,) is hide chunks of Styrofoam in the thick parts. Just make sure they don't surface when you tap the mold during the air-purge routine. Tying them to the mesh may help. Another way is to screw small boards across the top of the mold, with legs holding down the Styro-chunks thru the 'crete. When done air-purging, unscrew said boards, remove the legs, and fill in their "footprints".
Or let the Styro-chunks surface (cut holes the bottom re-mesh for this), and remove them after the 'crete's set.
If you wish to reduce the amount of 'crete needed (or get more volume), but don't care about weight, use rocks from your backyard in place of the "Styro-chunks".

You can make your concrete a different color by using pigment. Pigment may be pricey, so you may want to leave that out.
http://www.directcolors.com/concretepigment/
or buy it at a hardware store.
toiletmamba4 years ago
lol looks beast
Plan04 years ago
dude this is freakin awsome, think you could make anything else out of concrete?
gl0rious4 years ago
were did you get that wicked 80s board?!!??
Jebotepatak4 years ago

Wonderful work masters just wondering how heavy is the concrete park?
This would be a perfect excuse to buy a tech deck!! =)

Thank You
 

GianniMora5 years ago
 thts pretty sick!!


                  -M
andrewdover5 years ago
You guys rock. One of the best instructables I've ever seen......I love those Banana Board or Old School Skateboard TECH DECKS!!!
I have a banana board for sale 15$ 5 plies of veneer, cross plied, 3 birch, 2 african mahogandy
 ill by it
ok. how and where?
You can have it DungMachine
But seriously I want one of those!
roge5 years ago
this is so cool just finished making one
peterthomsen (author)  roge5 years ago
 right on. i'd love to see photos. can you add a pic to the comments here?
NickZa5 years ago

hey this looks good, i like it :D

 nice like rice
did you pour the concrete again and a bit thicker? seems like making the mold is most of the work.
can you buy me a tech deck
WTF
i got like, 10 for $2 each at Toys R Us in the bargain bin, i don't think you need people to buy them for you :\
randomSausage
buy 1 ur sen
Huh?
changuito076 years ago
too hard
 what did you expect? Great instructible!
10 years ago or so, I had a tech deck with the trucks removed and the bottom coated in felt, so I could play with it in school. (:
DungMachine5 years ago
I like it. I would make it. if only I had cement...
roboff5 years ago
very cool if u have the cement
some steel reinforcement would have helped, but i guess you know that by now.
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