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Old 03-09-2009, 09:07 PM   #1
Mala Lingua
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Cement Helmet?

Does anyone know if a helmet filled with concrete would just shatter if thrown? Maybe it'd hold up with a little bit of tossing? Anyone know?
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Old 03-09-2009, 09:10 PM   #2
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uhm.. there's some variables there. And to be blunt, a helmet filled with normal cement is gonna weigh enough that your not gonna casually 'toss' if about. :-)

In theory there are some...mixes that could effect strength and weight...
also depends if you remove the foam in the helmet or not...
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Old 03-09-2009, 09:12 PM   #3
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uhm.. there's some variables there. And to be blunt, a helmet filled with normal cement is gonna weigh enough that your not gonna casually 'toss' if about. :-)

In theory there are some...mixes that could effect strength and weight...
also depends if you remove the foam in the helmet or not...

So...leave foam in and maybe mix something in to lighten the cement? Any suggestions? Styrofoam peanuts work you think?
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Old 03-09-2009, 09:22 PM   #4
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Why not fill it with the expandable foam instead of cement. Cement is gonna be heavy
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Old 03-09-2009, 09:29 PM   #5
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Put a plastic bag in the helmet and fill with water to be put in the freezer....
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Old 03-09-2009, 09:38 PM   #6
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Why not fill it with the expandable foam instead of cement. Cement is gonna be heavy
But I need it to be kinda heavy...


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Originally Posted by kawasakijockey View Post
Put a plastic bag in the helmet and fill with water to be put in the freezer....
That's a possibility...
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Old 03-09-2009, 09:39 PM   #7
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I would hope it wouldnt shatter since the cement should reinforce the expansion of the plastic and prevent it from caving in even with the added weight.
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Old 03-09-2009, 09:53 PM   #8
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I would hope it wouldnt shatter since the cement should reinforce the expansion of the plastic and prevent it from caving in even with the added weight.
Well....guess we gonna find out!
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Old 03-09-2009, 11:22 PM   #9
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i got a helmet we can play with.
its a hsb helmet. it doesnt fit me so i can care less what happens to it. lmao. so when can we play?
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Old 03-09-2009, 11:45 PM   #10
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Are y'all not reinventing the wheel here? I would think that helmet companies spent enough money to figure out what is the best material to put in a helmet to save a cranium. But if they didn't, then test on. I figure the object was to save the head from impact and not save the helmet. With cement lining, you are creating a 1500-3000 lb/sq in surface and would have to add a huge layer of non-compressible material to prevent contact.
Just look at nature's perfect example the egg. The thin shell protects nothing but some white and yolk. Depending on how much force is used, you will not break the yolk. Increase the thickness to scale and see how much force it takes to crack the egg. Now you have a new helmet. Works for the egg, then should work for the head.

PS. I wonder why NFL players don't have cement in their helmets. It would make the game more exciting, since those huge necks would be able to lug around the helmets with ease, and finally we would have some real 'smash mouth" football.

Oh I forgot. All Rights Reserved on Egg shell technology helmet designs. (TM)2009 (C)2009
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Old 03-09-2009, 11:46 PM   #11
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Are y'all not reinventing the wheel here? I would think that helmet companies spent enough money to figure out what is the best material to put in a helmet to save a cranium. But if they didn't, then test on. I figure the object was to save the head from impact and not save the helmet. With cement lining, you are creating a 1500-3000 lb/sq in surface and would have to add a huge layer of non-compressible material to prevent contact.
Just look at nature's perfect example the egg. The thin shell protects nothing but some white and yolk. Depending on how much force is used, you will not break the yolk. Increase the thickness to scale and see how much force it takes to crack the egg. Now you have a new helmet. Works for the egg, then should work for the head.
Huh? I just wanna make a helmet heavy for a throwing contest. Is like the cannonball toss except with a cement helmet...for the MH Special Olympics.

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Old 03-10-2009, 12:02 AM   #12
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Huh? I just wanna make a helmet heavy for a throwing contest. Is like the cannonball toss except with a cement helmet...for the MH Special Olympics.
my bad, Mala. was flipping through posts and reading about bike tracking devices this guy made with prepaid cellphone,etc at same time and brain wandered. Got inventive for a sec.
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Old 03-10-2009, 12:09 AM   #13
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"Huh? I just wanna make a helmet heavy for a throwing contest. Is like the cannonball toss except with a cement helmet...for the MH Special Olympics."

Ok..itd help to know what you have planned. As long as your throwing it around on dirt, you'd probably be fine. Concrete/asphalt.. it might crack/shatter. The plastic might break, but the concrete survive... or the concrete might break.

Get your conrete mix, tape up the seams (presuming this is a full face). Get you some chicken wire or hardware mesh. Cut strips that will fit within the helmet...
You want your cement mix to be kinda like oatmeal, put a layer on the inside, lay you mesh on that, then put in the rest of the concrete. The longer it can 'cure' before the event...the better off you are. If you want to make a lighter mix... you can use perlite or vermaculite in the mix
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Old 03-10-2009, 09:12 AM   #14
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Styro peanuts won't work, tried that. Get some regular dense styrofoam, like the impact stuff they put in helmets, break it up to get the little beads and mix that in. Or you can just buy a bunch of crafts beads at Michael's or whatever. The rounder the better, spheres minimize filler contact so you have some structural integrity. For this application you'll prolly want to put a chicken wire "frame" in the helmet too so the concrete won't crack and pop out after the first toss.

GL!
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Old 03-10-2009, 09:27 AM   #15
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i think we have a beat up helmet you can have as well... will have to check but pretty sure
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