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chemical difference between cement and mortar

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Subject Author Date
chemical difference between cement and mortar bsd_mike 12-20-2006
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Posted by bsd_mike on December 20, 2006, 5:49 pm

Hello,
My son needs to do a science experiment on the affects of 'ice melt' on
sidewalks.

I have an extra bag of mortar and was wondering if cement and mortar
are similiar enough
that if we mixed up that, the results of his experiement would be
valid.

Otherwise off to the hardware store

-Mike


Posted by Bob Morrison on December 20, 2006, 5:57 pm
In a previous post bsd_mike wrote...
> My son needs to do a science experiment on the affects of 'ice melt' on
> sidewalks.
>
> I have an extra bag of mortar and was wondering if cement and mortar
> are similiar enough
> that if we mixed up that, the results of his experiement would be
> valid.
>
>

The sidewalk is "concrete", which is a combination of cement, aggregate
and sand.

Mortar is cement and sand (no aggregate), so is similar to the sidewalk.

Cement is just that, no aggregate, no sand.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by marson on December 20, 2006, 10:04 pm
also, mortar contains lime.

Bob Morrison wrote:
> In a previous post bsd_mike wrote...
> > My son needs to do a science experiment on the affects of 'ice melt' on
> > sidewalks.
> >
> > I have an extra bag of mortar and was wondering if cement and mortar
> > are similiar enough
> > that if we mixed up that, the results of his experiement would be
> > valid.
> >
> >
>
> The sidewalk is "concrete", which is a combination of cement, aggregate
> and sand.
>
> Mortar is cement and sand (no aggregate), so is similar to the sidewalk.
>
> Cement is just that, no aggregate, no sand.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com


Posted by dpb on December 21, 2006, 7:53 am

marson wrote:

....top posting corrected...

> Bob Morrison wrote:
> > In a previous post bsd_mike wrote...
> > > My son needs to do a science experiment on the affects of 'ice melt' on
> > > sidewalks.
> > >
> > > I have an extra bag of mortar and was wondering if cement and mortar
> > > are similiar enough
> > > that if we mixed up that, the results of his experiement would be
> > > valid.
> > >
> > >
> >
> > The sidewalk is "concrete", which is a combination of cement, aggregate
> > and sand.
> >
> > Mortar is cement and sand (no aggregate), so is similar to the sidewalk.
> >
> > Cement is just that, no aggregate, no sand.
> >
> > --
> > Bob Morrison, PE, SE
> > R L Morrison Engineering Co
> > Structural & Civil Engineering
> > Poulsbo WA
> > bob at rlmorrisonengr dot com

>
> also, mortar contains lime.

So does Portland cement, but I'm not sure of relative amounts...


Posted by Bob Morrison on December 21, 2006, 10:21 am
In a previous post marson wrote...
> also, mortar contains lime.
>

Ah yes. Thanks!

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

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