I spent some time reading the reference. Thank you for pointing it out.
I like the concept that water and cement form a paste that surronds the
filler. Now I didnot find out how far or wide we can go for the use of a
filler or aggregate.
Do you know anything about suphur-crete?
Chris opr VE7HCB
At 04:04 PM 2002-10-04 +0000, kr7x@attbi.com wrote:
>John and Towertalkians:
>
>Concrete does indeed cure by the process of hydration
>but it has actually more water than it needs to cure.
>
>The reason you wet cure is to prevent the reduction of
>surface strength by too rapid of a cure or drying at the
>air/concrete surface relative to the rest of the
>concrete mass and reduction of heat. This helps to
>prevent micro surface cracks in the concrete. Concrete
>does not absorb water in the curing process.
>
>Those interested should go to this url for a primer on
>concrete, placing and curing:
>
>http://www.portcement.org/cb/concretebasics_concretebasic
>s.asp
>
>Someone else talk about asking for more bags in the mix
>to get larger rock therefore more strength. Actually
>bags refer to the cement ratio of the mix. The more sacks
>(bags) of cement the higher the strength to a point.
>Larger rock does not mean higher strength.
>
>The above mention url is a very good place to get a
>basic understanding of how concrete really works and how
>the components interact.
>
>All the Best
>Hank Lonberg, S.E.,P.E. / KR7X
>Lonberg Design Group
>
>
>
>
> > on 10/3/02 10:26 PM, EUGENE SMAR at spelunk.sueno@prodigy.net wrote:
> >
> > > Concrete cures almost forever. That is, it is ALWAYS getting
> stronger. The
> > > trick is to wait until it's strong enough to support your antenna load.
> >
> > Not to nitpick, but I disagree. Concrete cures by a process called
> > hydration. This involves moisture being absorbed into the
> concrete. That's
> > why it's best to keep concrete covered in plastic for a week or so after
> > being poured. The moisture is what keeps the hydration process
> going. Once
> > the moisture is removed and the concrete completely dries, the hydration
> > stops and won't continue ever again. The concrete won't get any
> stronger at
> > that point.
> >
> > If you can constantly and forever keep the concrete damp or in water, it
> > will harden forever so your statement is not entirely incorrect.
> >
> > 73,
> >
> > Jon
> > NA9D
> >
> >
> >
> > -------------------------------------
> > Jon Ogden
> > NA9D (ex: KE9NA)
> >
> > Life Member: ARRL, NRA
> > Member: AMSAT, DXCC
> >
> > http://www.qsl.net/ke9na
> >
> > "A life lived in fear is a life half lived."
> >
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