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Posted by Glenn on April 25, 2007, 3:41 pm
When they built Hoover Dam they put cooling pipes through it
because of the heat buildup. When that section was set, they
pumped the pipe full of concrete and sealed it so sure it will set
up. And yes it will be stiffer. For a pipe to bend, a wall has
to collapse a fraction to full collapse. Full of concrete, that
action is curtailed.
> On Wed, 25 Apr 2007 17:31:34 GMT, Bob Morrison
> wrote:
>
>>In a previous post Bill wrote...
>>> I have a 10 ft. high 3 inch diameter pole which I filled with
>>> concrete
>>> (sand/topping mix). It took one and a half bags to fill the
>>> pipe.
>>>
>>> I am doing this for a satellite dish antenna so the pole will
>>> be more stable
>>> and not "wiggle".
>>>
>>> Basketball mounting poles also have this done I am told....
>>>
>>> Question: All that concrete is basically enclosed in the pipe
>>> and there is
>>> just the opening at the top. How would the concrete cure? How
>>> long would it
>>> take to cure? (Just curious...)
>>>
>>
>>First of all I doubt that filling the pipe with concrete will
>>have much
>>affect on the overall stiffness of the pole. The mount to the
>>ground is
>>the most critical element.
>
> Having done a lot of these (for satellite dishes, no less) yes,
> it
> does make a difference. Not to understate the need for a really
> good
> base.
>
>>
>>The concrete will harden just fine. It's a chemical reaction
>>taking
>>place, not drying in the typical sense. Remember concrete will
>>set up
>>underwater if need be.
>
> IMHO it will setup better in the pipe as it won't dry. Drying
> cement
> won't cure properly anyway.
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