Archaeometrical studies on plasters of some historical buildings

Download
index.pdf
2007
Çiftçi, Burcu Devrim
Show full item record
246
views
69
downloads
The present study aims to investigate the composition of historical plasters to get information about their material characteristics and their technology. Plaster samples were obtained from four Ankara Citadel houses built in late Ottoman period. In order to determine the raw material characteristics and mineralogical properties of plasters; chemical analyses, optical observation of cross sections, petrographic analyses of thin sections, elemental analyses by ICP-OES, X-ray powder diffraction analyses for the determination of mineral phases, thermogravimetric analyses and FTIR analyses were carried out. Interpretation of all the analytical examination was used to understand the composition and unique character of plaster samples studied. Observation of thin sections revealed more plaster layers than those observed in cross sections. Up to twelve layers could be observed with different colours, such as blue, red, yellow, green, white and brown. Generally, thicknesses of white plaster layers were found to be thicker than the others. In two samples, two black boundaries between plaster layers were identified which could be an indication of the use of asphalt for isolation purposes, like dampness proofing or heat insulation. Soluble salt contents of the plaster samples were in the range 3.04%-9.22%, with an average being 6.62%. The anions identified were Cl-, SO42-. In few samples, PO43-, NO2- and NO3- were found. Binder was found to be lime and gypsum. The amount of binder in terms of total calcium oxide, CaO, was found to be in the range of 33.5-43.6%, with an average being 37.9%. Amount of aggregate was about 62.1% as average. The main minerals identified in plaster samples were calcite and gypsum. Gypsum might be added to increase the strength of the plaster. Beside calcite and gypsum, quartz and pozzolanic activity related mineral, Opal-A, were found in some of the samples. In red plaster layers hematite mineral was also identified. Other colour effective elements were found to be Fe, Sb, Mn, Cu, Cr and Ni. Presence of organic additives was observed but clear identification was not established.
http://etd.lib.metu.edu.tr/upload/3/12608261/index.pdf
https://hdl.handle.net/11511/16764
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Archaeometric analysis on the selected samples of glass artifacts recovered in the excavation of Alanya castle /
Aksoy, Uğur Bülent; Demirci, Şahinde; Department of Archaeometry (2006)
The archaeological and technical questions about ancient glass have lead to various research activities such as identification and sourcing raw materials used in the glass production, investigation of the ways in which colors can be modified according to furnace atmosphere and times of firing. Considering research areas and publications it can be suggested that compositional studies of well-dated samples of ancient glass have disclosed useful information concerning raw materials characteristics and producti...
Archaeometrical investigation of some Seljuk plasters
Caner, Evin; Demirci, Şahinde; Saltık, Emine N. Caner; Department of Archaeometry (2003)
The aim of the study was to investigate Seljuk Plasters used in some of their royal administrative or residential buildings from a viewpoint of their raw materials and technological characteristics. Some Byzantine Plasters of the same period were also investigated to make comparison. Plasters from some historic structures in the archaeological sites namely; Alanya Castle, Kubadabad Palaces, Syedra Archaeological Site, Aspendos Amphitheatre, Selinus Archaeological Site-Sekerhane Kösk and Hasbahçe were examin...
My faithfull machine: the role of technology in daily life the case of singer sewing machine in Turkey
İşler Sarıoğlu, Ayşen; Yıldırım, Onur; Department of Science and Technology Policy Studies (2011)
This thesis aims to investigate the role of domestic technology in daily life. It focuses on the impact of household technologies upon women’s lives and attempts to address the questions of how women could create an agency through technology to transform their lives and how a technological appliance could act to empower women. Of all household technologies, Singer sewing machine was chosen owing to its representative nature. Accordingly, the thesis provides a brief history of Singer Company in order to desc...
Archaeometrical investigation of some medieval glass samples from Alanya region
Beşer, Elif; Uzun, Ali; Department of Archaeometry (2009)
The archaeological questions of historical glass have lead to remarkable research activities such as identification and sourcing the raw materials used in the glass production, investigations of the ways in which the colors of glass can be modified due to dissolved and/or colloidal coloring agents, the furnace conditions, and the time of fritting and melting. Considering publications, it can be suggested that compositional studies of well-dated glass samples have supplied useful information concerning raw m...
Numerical and experimental analysis of quench induced stresses and microstructures
Gür, Cemil Hakan (1998-01-01)
Numerical and experimental studies have been carried out to investigate the evolution of residual stresses and microstructures in quenched steel components. In the numerical analysis, a finite element model is implemented for predicting the temperature field, phase changes with their associated internal stresses in axisymmetrical components. The model is verified by several comparisons with other known numerical results. Case studies are performed to investigate the effects of the quench bath temperature an...
Citation Formats
B. D. Çiftçi, “Archaeometrical studies on plasters of some historical buildings,” M.S. - Master of Science, Middle East Technical University, 2007.
METU IIS - Integrated Information Service open@metu.edu.tr