Mary,

As well as the refs that Chris Andersen sent out, the following has a
chapter entitled "The Foundation and Walls -- Limes, Cements and Mortars" :

Vincent, Elizabeth (1993) "Substance and Practice: Building Technology and
the Royal Engineers in Canada" Parks Canada, Ottawa.

Cheers,
Megan Springate
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At 04:28 PM 11/30/99 -0500, you wrote:
>Hello HISTARCHERS,
>I've been approached about an issue probably more architectural than
>archaeological, but wondered if anyone could help.  A colleague wants to
>know if there is a chronology for
>concrete or any other way to date it.   Not really within my ken, sad to
>say.  Any ideas?
>Thanks, M.
>
>
>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^
>Mary C. Beaudry, Associate Professor
>Department of Archaeology
>Boston University
>675 Commonwealth Avenue
>Boston, MA 02215
>
>tel. 617-353-3415
>fax. 617-353-6800
>email [log in to unmask]
>
>http://www.bu.edu/archaeology/faculty/beaudry/beaudry.html
>
>Field School:
>http://www.bu.edu/archaeology/faculty/beaudry/fs_heb.html
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>