While I would prefer to know more about the specifics of this site, rather
than generalizing, I can say that localized erosion, particularly in areas
with moisture infiltration problems, is the general pattern. Are you sure you
are looking at 1822 mortar, or is it the post civil war mortar? Far more
common to use natural cement in the 1860's, when it was the dominant hydraulic
mortar technology.
As for the stone, it is probably local. While the Corps of Engineers went to
great expense to bring natural cement and dolomitic lime from Rosendale, NY to
points over a thousand miles away, they wouldn't go 10 feet further than
necessary for aggregates or water, often using beach sand and the Atlantic
Ocean, respectively.
Edison Coatings, Inc.
Michael P. Edison
President
3 Northwest Drive
Plainville, CT 06062
Phone: (860) 747-2220 or (800)697-8055
Fax: (860)747-2280 or (800) 697-8044
Internet: www.edisoncoatings.com
E-Mail: [log in to unmask]
---------- Original Message -----------
From: John Callan <[log in to unmask]>
To: [log in to unmask]
Sent: Sun, 12 Mar 2006 12:13:16 -0600
Subject: Re: [BP] Re Salt with lime
> Any idea what it would look like if it had been in place since 1822
> +/-, repeatedly flooded and subjected to hurricanes and four days of
> bombardment by Farragut in 1862, then rebuilt by the army? Some of
> the mortar is worn smoothe. Lots of shells and pockets of
> voids...almost looks like dirty marble. But, of course a great deal
> of it is missing.
>
> Any idea where the army would be ordering brown stone at that time?
>
> -jc
>
> On Mar 12, 2006, at 6:51 AM, edison wrote:
>
> > Natural cement could have been used as early as 1796, but would
> > have been very
> > expensive to import from Europe. US production began in 1818.
> >
> > Edison Coatings, Inc.
> > Michael P. Edison
> > President
> > 3 Northwest Drive
> > Plainville, CT 06062
> > Phone: (860) 747-2220 or (800)697-8055
> > Fax: (860)747-2280 or (800) 697-8044
> > Internet: www.edisoncoatings.com
> > E-Mail: [log in to unmask]
> >
> > ---------- Original Message -----------
> > From: John Callan <[log in to unmask]>
> > To: [log in to unmask]
> > Sent: Sat, 11 Mar 2006 20:54:40 -0600
> > Subject: Re: [BP] Re Salt with lime
> >
> >> Could natural cement without lime have been used as early as 1822?
> >>
> >> -jc
> >>
> >> On Mar 11, 2006, at 8:25 PM, edison wrote:
> >>
> >>> Lime is generally unsuitable for immersion in any type of water for
> >>> several
> >>> reasons. First, it is slightly soluble in water and will erode.
> >>> Second, it
> >>> takes a long time to carbonate and cannot withstand immersion in an
> >>> uncarbonated condition, nor can it carbonate in an immersed
> >>> condition.
> >>>
> >>> Natural cement without lime was used in US coastal fortifications
> >>> after 1825
> >>> in areas which were subject to immersion. In non-immersion
> >>> construction, some
> >>> lime was added to natural cement to reduce cost. Presumably the
> >>> natural cement
> >>> acts as a pozzolan in these mixtures.
> >>>
> >>> Michael P. Edison
> >>> The Second American Natural Cement Conference
> >>> www.naturalcement.org
> >>>
> >>>
> >>> ---------- Original Message -----------
> >>> From: [log in to unmask]
> >>> To: [log in to unmask]
> >>> Sent: Sat, 11 Mar 2006 13:17:45 EST
> >>> Subject: [BP] Re Salt with lime
> >>>
> >>>> Better minds can respond to this query ,but lime mortar absorbs
> >>>> water
> >>>> then at a certain point sheds it , salts are crystals that "
> >>>> bloom"with the wet dry process prior to Portland ,fort work was
> >>>> "capped " with Natural Cement (see conference with Mike Edison)
> >>>> this
> >>>> according to documentation found in the Army Corps of Engineers
> >>>> 1898
> >>>> Why? because of its strength and ability to shed water
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> To terminate puerile preservation prattling among pals and the
> >>>> uncoffee-ed, or to change your settings, go to:
> >>>> <http://listserv.icors.org/archives/bullamanka-pinheads.html>
> >>> ------- End of Original Message -------
> >>>
> >>> --
> >>> To terminate puerile preservation prattling among pals and the
> >>> uncoffee-ed, or to change your settings, go to:
> >>> <http://listserv.icors.org/archives/bullamanka-pinheads.html>
> >>
> >> --
> >> To terminate puerile preservation prattling among pals and the
> >> uncoffee-ed, or to change your settings, go to:
> >> <http://listserv.icors.org/archives/bullamanka-pinheads.html>
> > ------- End of Original Message -------
> >
> > --
> > To terminate puerile preservation prattling among pals and the
> > uncoffee-ed, or to change your settings, go to:
> > <http://listserv.icors.org/archives/bullamanka-pinheads.html>
>
> --
> To terminate puerile preservation prattling among pals and the
> uncoffee-ed, or to change your settings, go to:
> <http://listserv.icors.org/archives/bullamanka-pinheads.html>
------- End of Original Message -------
--
To terminate puerile preservation prattling among pals and the
uncoffee-ed, or to change your settings, go to:
<http://listserv.icors.org/archives/bullamanka-pinheads.html>
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