PHYSICAL PROPERTIES FOR THE CHARACTERIZATION OF WATERLOGGED ARCHAEOLOGICAL WOODS OF EIGHT YENİKAPI SHIPWRECKS FROM BYZANTINE PERIOD

Abstract

37 shipwrecks, constituting the biggest medieval shipwrecks collection in the world, which are dated from

5th to 11th centuries AD, were uncovered by salvage excavations conducted in Yenikapı, Istanbul. In this

study, 160 wood samples taken from eight shipwrecks (YK 13, YK 16, YK 18, YK 21, YK 22, YK 25, YK 29 and

YK 35) were analyzed for determining degradation degree of the woods. For this purpose, physical property

analyses such as maximum water content, basic density, and loss of wood substance, and SEM-EDS were

conducted. In order to examine the relationship between the degradation degree of the woods and wood

species, samples were taken from different shipwrecks considering wood species. The wood samples were

determined as 9 different species of wood (oak, pine, elm, cedar, cypress, ash, fir, plane and chestnut).

Maximum water content values of the samples ranged between 148% and 1044%. With the evaluation of the

highly degraded wood samples group, especially plane wood samples were found in this group.