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/diy/ Do-It-Yourself

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Anonymous 2012-11-14 15:58:10 No.331390

[Missing image file: 05WHI-20105.jpg]

This is just a thought exercise for me. It is nothing I'll be doing practically.

What are some already established ways to reinforce concrete without using metal? Metal as in rebar, fencing, wire, I-beams, etc.

I know fiberglass is sometimes used, but not for crossing large areas, just small fibers to prevent small breakages. (like adding pine needles to your sandcastle's sand to strengthen it) What else is there or can we come up with a few ideas? Reusing materials from other sources would be a plus.


>>
Anonymous 2012-11-14 16:07:58 No.331392
All stone additives add tensile strength to a certain degree; sharp gravel, sharp sand, and stone dust.

Fiberglass fibers add tensile strength, but it must be the alkali resistant type.

Polypropylene fibers can be used, but there's controversy over these,
http://www.concreteconstruction.net/images/Polypropylene%20Fibers%20in%20Concrete_tcm45-347135.pdf

Fibers and stone seem to be the best small sized things you can use to increase concrete strength,
http://en.wikipedia.org/wiki/Fiber-reinforced_concrete

I wonder if rods of hard tough plastic would help any at all? I know they'd not be as good as steel rebar, but metal in concrete can rust and crack the concrete. Even coating the metal in plastic might be an idea to make it last even longer though.

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Anonymous 2012-11-14 16:27:23 No.331401
>>331390
As someone who works in the construction industry as a surveyor for a civil engineering firm, the primary reason why rebar is the most commonly used material for reinforced concrete is because it gives the highest amount of tensile strength. Iron isn't exactly a rare material either, so it's also relatively inexpensive compared to some other methods. But overall when it comes to civil construction projects like bridges, sidewalks buildings, etc.... you're going to want rebar reinforced concrete.

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Anonymous 2012-11-14 16:47:30 No.331417
>>331401
True, but in this thread you can't use it.

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Anonymous 2012-11-14 17:08:32 No.331427
Bone(s)

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Anonymous 2012-11-14 17:13:55 No.331431

[Missing image file: fcc2_076_JJusko_Conan_MikeH.jpg]
The remains of your enemies.

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Anonymous 2012-11-14 17:21:11 No.331441
>>331427
Thats actually a good answer.

I'd suggest CF or thinly coated spider silk. I'd imaging you could try fishing net or cut up milk jugs/pop bottles if you were poor

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Anonymous 2012-11-14 17:58:23 No.331477
Straw.

From Strawbales.

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Anonymous 2012-11-14 18:07:51 No.331486
>>331441
lol There's an idea. Using silk from those GMO goats.

Strips of plastic from old jugs and bottles is a nice idea too.

>>331477
Very old world, I like it. Similar to cob and related building materials. Although, I wonder how it would hold up inside concrete? Id imagine the concrete will break it down and render it useless.

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Anonymous 2012-11-14 18:28:10 No.331508
>>331477
>>331486
Mix in some Strawberries. It will rejuvenate the straw throughout the life of the concrete

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Anonymous 2012-11-14 18:36:31 No.331513
>>331431
the perspective in this painting hurts my brain.

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Anonymous 2012-11-14 19:42:05 No.331552
>>331401
also iron has the same thermal expansion rate as concrete. i.e. when heated the two with same shape and volume both lengthen the same length. this prevents cracking.







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