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Fresh Cement!!!

Old 04-28-07, 07:01 PM
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Florentin
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Fresh Cement!!!

Today I went for a ride, on a scenic drive, on the side of an express way.

To the amusement of some children in a car that were watching me, and probably making fun of my wind-blown hair... I rode into some fresh cement I was lucky it wasn't too deep, and I went right through it. I think it was at least one-foot deep...

Oh well...


Will that stuff come out of my wheels? Do I use water? Should I really care, or should I just leave it like this, so it really looks like a 'mountain' bike?

thanks
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Old 04-28-07, 07:10 PM
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i would spray it off with water or just scrub it off with some thing or another
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Old 04-28-07, 07:33 PM
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how much did you sink in? an inch or so? did it get all over your derailleur or anywhere else? pics... picss
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Old 04-28-07, 07:37 PM
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Florentin, rest assured you didn't ride through a foot-deep section of wet cement. You would have been instantly thrown from your bicycle. The cement should be sprayed-off immediately to prevent damage to the bike.

Last edited by Blue Jays; 04-28-07 at 10:56 PM.
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Old 04-28-07, 08:41 PM
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Blue Jay is correct. That definitely needs to be sprayed off asap.
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Old 04-29-07, 09:37 PM
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Originally Posted by Alkazeer
Blue Jay is correct. That definitely needs to be sprayed off asap.
It should have been sprayed off as soon as you got into it. It's too late now. The good news is that it won't hurt your bike. The bad news is that it's tough to get off. Depending on how much you have on the bike, it's going to do what cement does best...become a rock!

You can remove it with stuff called muriatic acid...dilute hydrochloric acid. The stuff is corrosive but not as bad as battery acid. You will need rubber gloves, a sponge and a bucket. Do not scrub! You want to dab it on and avoid prolonged contact with steel parts...all steel parts including stainless steel. Rinse very well with water after use. If you do your clean up on a concrete surface, you may want to protect it too. Muriatic acid works well on cured concrete too
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Old 04-29-07, 09:41 PM
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DO NOT FORGET THE HARD HAT
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Old 04-29-07, 10:36 PM
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Old 04-30-07, 10:37 AM
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Originally Posted by FreeRidin'

DO NOT FORGET THE HARD HAT
I saw the Mythbusters using dynamite to clean a cement mixer. Maybe a couple of M-80s will complete the cleanup job

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Old 04-30-07, 12:08 PM
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Cement has this funny little way of corroding metal.
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Old 04-30-07, 01:06 PM
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You mean rebar?
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Old 04-30-07, 01:37 PM
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well cement does have some sort of acid in which does eataway at some stuff. I know this because I poured cement on top of the buried power line when I was building a deck at my cousines house and -- lo and behold a week later, the power went out. They had to come out and splice the line.

The same thing happened to the buried cable line at my boss's house. But I didn't do it.
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Old 04-30-07, 02:37 PM
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...or muratic acid and a wire brush.
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Old 04-30-07, 04:02 PM
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Originally Posted by apclassic9
Cement has this funny little way of corroding metal.
Portland cement (probably the most common type) is a fine powder of calcium oxide (lime), clay, sand and iron ore. It doesn't become concrete until mixed with water and aggregate. That reaction is basic which might do a little damage to aluminum but not to steel parts. The pH of fresh concrete is rather high (11 to 12) but it decreases rapidly as it cures. Since it's already on the bike, any damage has already been done.

Another acid that could be used to remove it is phosphoric acid which is a little milder than muriatic acid.
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Old 04-30-07, 04:05 PM
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Originally Posted by clancy98
well cement does have some sort of acid in which does eataway at some stuff. I know this because I poured cement on top of the buried power line when I was building a deck at my cousines house and -- lo and behold a week later, the power went out. They had to come out and splice the line.

The same thing happened to the buried cable line at my boss's house. But I didn't do it.
It's basic...not acidic.
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Old 05-18-07, 08:47 PM
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wow, look at all the info in here

no, I did NOT clean it up It looks a little 'rugged' at the bottom, but it has character now
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Old 05-27-07, 04:41 PM
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there is a company in south western virgina that distributes a "natural organic" product that will essentially reverse the chemical reaction between cement and water that creates concrete and should allow you to soften the concrete with minimal damage to steel, painted and aluminum surfaces. i'm a construction manager and i've used this product on a limited basis with moderate success. the company is called socon or southern concrete pumping or something like that. not much help but maybe you can check with someone local to you and find a smiliar product.
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Old 05-27-07, 05:32 PM
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If its not interfearing with normal operation of the bike id just leave it. It'll wear off eventually (years).
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Old 05-27-07, 05:36 PM
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If we can have concrete boats and canoes, why not concrete bicycles?
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