Concrete Question again

[Anonymous]

I have a question about concrete curing time. I have a block of concrete 8'
wide x 8' x wide x 10' deep, How long does it take for it to cure. I have
two opinions and both are from engineers. 8 days from one to 21-28 days says
the other. I have a very large structure 35' tall single pole sticking out
of the concrete vertically. Can someone give me a third opinion? Thanks
Jerry Chasek

[Anonymous]

Talk to your concrete supplier. There are factors in the mix they use that
will affect your decision.

Steve

"Jerry Chasek" wrote in message
news:0EB0B7DF4F5C5FABE86B2B91EE998462@in.WebX.maYIadrTaRb...
> I have a question about concrete curing time. I have a block of concrete
8'
> wide x 8' x wide x 10' deep, How long does it take for it to cure. I have
> two opinions and both are from engineers. 8 days from one to 21-28 days
says
> the other. I have a very large structure 35' tall single pole sticking out
> of the concrete vertically. Can someone give me a third opinion? Thanks
> Jerry Chasek
>
>

[Anonymous]

Answer to my own question, 7 days the concrete should be at its compressive
strength or 90% of max. It is tested at 7 days and 28 days and if the test
shows less than the recommended strength for that type of concrete, then it
should be redone. Hope we don't have that problem! That's a lot of concrete
to tear out.
Jerry

"Steve" wrote in message
news:50A8FD666CB0488F0C9B95AA5E526C4A@in.WebX.maYIadrTaRb...
> Talk to your concrete supplier. There are factors in the mix they use that
> will affect your decision.
>
> Steve
>
> "Jerry Chasek" wrote in message
> news:0EB0B7DF4F5C5FABE86B2B91EE998462@in.WebX.maYIadrTaRb...
> > I have a question about concrete curing time. I have a block of concrete
> 8'
> > wide x 8' x wide x 10' deep, How long does it take for it to cure. I
have
> > two opinions and both are from engineers. 8 days from one to 21-28 days
> says
> > the other. I have a very large structure 35' tall single pole sticking
out
> > of the concrete vertically. Can someone give me a third opinion? Thanks
> > Jerry Chasek
> >
> >
>

[Anonymous]

10' deep, Sounds like a Jimmy Hoffa deal! ;^)

I know they use different agents to affect the curing time based on climate
and available water, other than that, I know it's got rocks and cement in it
and it's easy to model.

Steve

"Jerry Chasek" wrote in message
news:9A78BE8AC54A7AE9EE3156ECA9052AD5@in.WebX.maYIadrTaRb...
> Answer to my own question, 7 days the concrete should be at its
compressive
> strength or 90% of max. It is tested at 7 days and 28 days and if the test
> shows less than the recommended strength for that type of concrete, then
it
> should be redone. Hope we don't have that problem! That's a lot of
concrete
> to tear out.
> Jerry
>
> "Steve" wrote in message
> news:50A8FD666CB0488F0C9B95AA5E526C4A@in.WebX.maYIadrTaRb...
> > Talk to your concrete supplier. There are factors in the mix they use
that
> > will affect your decision.
> >
> > Steve
> >
> > "Jerry Chasek" wrote in message
> > news:0EB0B7DF4F5C5FABE86B2B91EE998462@in.WebX.maYIadrTaRb...
> > > I have a question about concrete curing time. I have a block of
concrete
> > 8'
> > > wide x 8' x wide x 10' deep, How long does it take for it to cure. I
> have
> > > two opinions and both are from engineers. 8 days from one to 21-28
days
> > says
> > > the other. I have a very large structure 35' tall single pole sticking
> out
> > > of the concrete vertically. Can someone give me a third opinion?
Thanks
> > > Jerry Chasek
> > >
> > >
> >
>
>

[Anonymous]

Well ... 'less you're trying to model a cement bust of Jimmy Hoffa, maybe.

~Larry

"Steve" wrote in message
news:85B340BD2B5C3AD7D5F7F0076D3F592B@in.WebX.maYIadrTaRb...
> 10' deep, Sounds like a Jimmy Hoffa deal! ;^)
>
> I know they use different agents to affect the curing time based on
climate
> and available water, other than that, I know it's got rocks and cement in
it
> and it's easy to model.
>
> Steve
>
> "Jerry Chasek" wrote in message
> news:9A78BE8AC54A7AE9EE3156ECA9052AD5@in.WebX.maYIadrTaRb...
> > Answer to my own question, 7 days the concrete should be at its
> compressive
> > strength or 90% of max. It is tested at 7 days and 28 days and if the
test
> > shows less than the recommended strength for that type of concrete, then
> it
> > should be redone. Hope we don't have that problem! That's a lot of
> concrete
> > to tear out.
> > Jerry
> >
> > "Steve" wrote in message
> > news:50A8FD666CB0488F0C9B95AA5E526C4A@in.WebX.maYIadrTaRb...
> > > Talk to your concrete supplier. There are factors in the mix they use
> that
> > > will affect your decision.
> > >
> > > Steve
> > >
> > > "Jerry Chasek" wrote in message
> > > news:0EB0B7DF4F5C5FABE86B2B91EE998462@in.WebX.maYIadrTaRb...
> > > > I have a question about concrete curing time. I have a block of
> concrete
> > > 8'
> > > > wide x 8' x wide x 10' deep, How long does it take for it to cure. I
> > have
> > > > two opinions and both are from engineers. 8 days from one to 21-28
> days
> > > says
> > > > the other. I have a very large structure 35' tall single pole
sticking
> > out
> > > > of the concrete vertically. Can someone give me a third opinion?
> Thanks
> > > > Jerry Chasek
> > > >
> > > >
> > >
> >
> >
>

[Anonymous]

http://www.waffle-iron.com/16/main.php scroll down to:

"Concrete reinforced with mob informers" for valuable engineering
information.



"Larry Caldwell" wrote in message
news:267467CBB12D24907854669C0C03A1B3@in.WebX.maYIadrTaRb...
> Well ... 'less you're trying to model a cement bust of Jimmy Hoffa, maybe.
>
> ~Larry
>

[xavierl]

The supplied concrete should reach it specified strength by 28 days. The supplier will have test cubes, so you could crush some a bit earlier, say at 14 days and at 21 days. This is the only legal way to know what the strength is. You could also use a rebound hammer or Schmidt hammer. This is an instrument that measures the E-modulus or hardness and outputs a cube strength value. Any concrete lab should have one.
In my experience if the weather is warm and the supplier delivers concrete that is a bit above spec to cover himself, you should reach full strength well before 28 days.

regards, Frans X Liebenberg.