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 Kö / sk and Hasbahç / e were examined.
In a series of examination basic physical properties of the plasters as bulk
density, porosity, water absorption capacity and water vapour permeability
were obtained. The results indicated that plasters are low dense and high
porous materials and having good breathing property.
Mechanical properties of the plasters were expressed by the modulus of
elasticity (Emod) values which were obtained from ultrasonic pulse velocity
measurements. The Emod of the plasters being in the range of 1.0 to 5.6 Gpa show that they have enough mechanical strength comparable to historic
mortars and bricks.
Raw material composition and mineralogical properties of plasters were
determined by combined interpretation of several types of analyses such as
chemical analyses, particle size distribution of aggregates, petrographic
analyses of thin sections by optical microscopy, scanning electron microscopic
analyses of cross sections coupled with EDX for image analyses and semiquantitative
elemental analyses, X-ray powder diffraction analyses for the
determination of mineral phases, thermogravimetric analyses and FTIR
analyses. Binder used in all plasters was found to be lime with amount in the
range of 53.8-96.8% as CaCO3. The main minerals of aggregates are quartz,
calcite (limestone), dolomite and opal-A. Regarding particle size distribution of
aggregates it was possible to classify them into fine, coarse and mixed
aggregates having rather high pozzolanicity.
Study on decorative and red zigzag patterned plasters indicated presence of
haematite as the source of red pigment. Study on green colored plaster also
indicated presence of iron containing mineral with lower oxidation state.
The Seljuk and Byzantine Masonries chosen are still surviving buildings that
their plasters should be of good quality. In fact, this study approved their
quality which may be due to the presence of opal-A and dolomite.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/1218858/index.pdf |
| Date | 01 January 2003 |
| Creators | Caner, Evin |
| Contributors | Demirci, Sahinde |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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