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Concrete slab for parking a car

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Concrete slab for parking a car Les Desser 11-09-2006
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Posted by Les Desser on November 9, 2006, 9:16 am

>In our area (northern Ohio), the vast majority of driveways are nominal
>4". 6" is extra strong,

Thank you, DanG and RicodJour for your responses.

[..]

>Place the mesh in the lower third of the pour, where it will contribute
>to the bending strength.

That was my initial thought as well, but after further consideration
I think it should go in the bottom.

With a vehicle on the drive (about 3" wider than the vehicle) the weight
on each side would be trying to break the slab downwards across the
middle.

I.e. trying to crack it open at the top. So the mesh should be located
in the top. Not so?
--
Les Desser
(The Reply-to address IS valid)

Posted by RicodJour on November 9, 2006, 9:25 am

Les Desser wrote:
>
> >In our area (northern Ohio), the vast majority of driveways are nominal
> >4". 6" is extra strong,
>
> Thank you, DanG and RicodJour for your responses.
>
> [..]
>
> >Place the mesh in the lower third of the pour, where it will contribute
> >to the bending strength.
>
> That was my initial thought as well, but after further consideration
> I think it should go in the bottom.
>
> With a vehicle on the drive (about 3" wider than the vehicle) the weight
> on each side would be trying to break the slab downwards across the
> middle.
>
> I.e. trying to crack it open at the top. So the mesh should be located
> in the top. Not so?

Read the recent discussions on reinforcing slabs in driveways that have
popped up on this newsgroup recently. There are differing opinions on
the benefit of reinforcement.

Is that dimension correct? The drive is 3 inches wider than the car?

R


Posted by Les Desser on November 10, 2006, 10:40 am

>Is that dimension correct? The drive is 3 inches wider than the car?

Sorry, slip of the finger - should read 3 foot wider.
--
Les Desser
(The Reply-to address IS valid)

Posted by Les Desser on November 12, 2006, 6:33 pm
Further to my earlier query, about an 8" slab, how long should I leave
it to dry before parking my car on it?

Temperatures here in the UK in London currently running 10-20 degrees F
above freezing
--
Les Desser
(The Reply-to address IS valid)

Posted by DanG on November 12, 2006, 8:04 pm
If you are buying the concrete from a ready mix plant, work out
the details with them.


Keep the water/cement ratio to a minimum, use air entrainment, ask
about high early concrete (the term we use here). Plan on curing
the concrete either with chemical, visqueen, or flood (continuous
sprinkle) as long as you are above freezing for at least 3 days.
I would consider 3 days as a minimum, 7 if possible, and 28 if you
want the full initial cure.
___________________________
Keep the whole world singing. . . .
DanG


> Further to my earlier query, about an 8" slab, how long should I
> leave it to dry before parking my car on it?
>
> Temperatures here in the UK in London currently running 10-20
> degrees F above freezing
> --
> Les Desser
> (The Reply-to address IS valid)



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