Analysing gypsum mortar
connecting that slab to the bedrock allowed them to determine its age, dating it to 335-345 AD.
"The Use of Gypsum Mortar
in Historic Buildings," Structural Repair and Maintenance of Historic Buildings, II, ed C.A.
The ancient Egyptian workers had sealed off the chamber with a gypsum mortar that protected the wood from water, oxygen and bacteria--the principal elements of decay.
The gypsum mortar used by the ancient Egyptians to seal both chambers is a crack-filling agent that expands when wet, says Rogers.
Evidence of monumental ashlar walls has also been revealed in a series of gypsum mortar
setting beds for large stone blocks.
Extensive evidence for monumental ashlar walls was revealed in a series of gypsum mortar
setting beds for large stone blocks, most likely robbed out during the Early Byzantine period (6th-7th century AD) for construction of the Christian basilicas across the way at Agios Georgios, the Antiquities Department said.
Braganca, "Influence of incorporation phase change materials, PCM, granulates on workability, mechanical strength and aesthetical appearance of lime and gypsum mortars
," Architecture Civil Engineering Environment--The Silesian University of Technology, vol.