Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7776
AuthorsJACKSON, M. D. 
CIANCIO ROSSETTO, P. 
KOSSO, C. K. 
BUONFIGLIO, M. 
Marra, F. 
TitleBUILDING MATERIALS OF THE THEATRE OF MARCELLUS, ROME*
Issue Date2011
Series/Report no.4/53(2011)
DOI10.1111/j.1475-4754.2010.00570.x
URIhttp://hdl.handle.net/2122/7776
KeywordsVOLCANIC TUFF MASONRY
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous 
AbstractThe building materials of the Theatre of Marcellus, 44–11 BCE, reflect Roman builders’ careful selections of tuff and travertine for dimension stone and volcanic aggregates for pozzolanic concretes. The vitric–lithic–crystal Tufo Lionato tuff dimension stone contains a high proportion of lava lithic fragments, which increase its compressive strength and decrease water sorption, enhancing durability. Sophisticated installations of travertine dimension stone reinforce the tuff masonry, which is integrated with durable concrete walls and barrel vaults. The pozzolanic mortars of the concretes contain harenae fossiciae mainly from the intermediate alteration facies of the mid-Pleistocene, scoriaceous Pozzolane Rosse pyroclastic flow. They have pervasive interpenetrating pozzolanic cements, including strätlingite, similar to highquality, imperial era mortars. Concrete walls are faced with refined Tufo Lionato opus reticulatum and tufelli, and opus testaceum of fired, greyish-yellow brick. The exploratory concrete masonry, which includes some of the earliest examples of brick facings and strätlingite cements in Rome, and the integration of these materials in complex architectural elements and internal spaces, reflect the highly skilled workmanship, rigorous work-site management and technical supervision of Roman builders trained in republican era methods and materials.
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