A03_P08

Modeling the actual age of mortars - experimental research

Michalska D¹, Pawlyta J²

¹Adam Mickiewicz University, Institute of Geology, Poznań, Poland, ²Department of General Geology and Geotourism, AGH University of Science and Technology Faculty of Geology, Geophysics and Environmental Protection, Kraków, Poland

An attempt to model the age of mortar were made on the basis on the results of the ¹⁴C measurement for the bulk material together with the knowledge of the δ¹³C of various mortar components. In order to assess the variability of isotopic fractionation during CO₂ absorption by mortar carbonates depending on the environmental conditions and the type of mortar, the δ¹³C measurements were performed for the mortars from Kraków. Similar analyzes were also carried out for natural limestone and for the experimental mortars produced in the laboratory. Knowledge about the isotopic fractionation allows to make an age correction for mortars along with the verification of such correction based on the percentage estimation of the carbonate components. The obtained results were compared with earlier attempts to model the age of mortars from Sussita (Sea of Galilee).