[AT] another new shop

[charlie hill]

I don't think you better try that with anything thicker than a 4 or maybe 6
inch slab Walt.  I don't care if you pour it at 1/2 inch slump.   I have
poured some 1 inch slump concrete before but it was because it was on a slab
on a 100%  grade (45 deg angle) and I didn't want it to run down the hill.
We had it mixed very very dry with plasticizer added.  The truck wanted to
turn over almost when the drum turned and we had to vibrate it a lot to get
it to lay down and to get the voids out.  Then I had to core drill it to
prove to the owner that it was up to strength.  Dry is strong up to a point
but concrete is a chemical reaction between the components.  There has to be
enough of all the components and water is one of them.

Charlie

----- Original Message ----- 
From: <DAVIESW739 at aol.com>
To: <at at lists.antique-tractor.com>
Sent: Friday, August 13, 2004 1:47 AM
Subject: Re: [AT] another new shop


> In a message dated 8/12/2004 6:35:39 PM Pacific  Daylight Time,
> gremaux at tein.net writes:
> my turn Walt....
> first if you took  the forms off while the truck was still there.....how
did
> you pick up the  mess......cause it would not stand upright that soon
> ....next morning yes but  not while the truck was still there.
> Agreed that cured in the air is  best
>
> Frank I don't know how wet your pour your concrete But I have worked  in
it
> for over 40 years and I alway pull the forms right away not the next day
as i
> don't like to pry them off with a sledge hammer.  I don't know who you
work
> for but I bet its like the stuff we get out here now sloppy wet with no
> strength. The dryer the concrete the stronger it will be that's what I was
taught
> and none of you will ever change my mind on that. I have seen wet
concrete
> poured where it flaked off until there was nothing left. You only get
cracks
> from freezing if water can get into the concrete simple logic.  Also  to
stop
> cracking then besure that you have a solid foundation to put it on. Sand
or or
> small gravel is not enough you need a good rock base start with large ones
> then add the smaller size up to the top of the base where sand and or
gravel can
> be used.
>
>
> Walt Davies
> Cooper Hollow Farm
> Monmouth, OR  97361
> 503 623-0460
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>