EVALUATION OF SIVAS TRADITIONAL â??SWEET PLASTERS"

Year 2011, Volume: 24 Issue: 1, 161 - 173, 14.01.2011

Çiğdem Tekin , Sedat Kurugöl

Abstract

Having a wide range of application area at historical structures of various regions in Anatolia in the past, material known as sweet plaster among public is analyzed in this study in terms of its chemical, physical and mineralogical characteristics and on the basis of its applications in Sivas example. In this scope, thin and coarse plaster samples are taken from traditional houses where this material was applied and chemical analysis is performed by means of ICP-ES and mineralogical analysis through XRD. Loss of mass and phase transformations occurring in accordance with temperature values are examined by TGA analysis applied on coarse and thin plasters. As a result of all analysis, it is identified that sweet plaster binder mainly consists of calcium sulfate and anhydrate. Additionally, it is confirmed that lime was also added during preparation of sweet plasters in respect of results of ICP, XRD and acid treatment analysis and lime rate is obtained as 15-20% in coarse plasters and at about 5-10% within thin plasters. As an aggregate, usage of clayed sand having tuffic characteristic in coarse plaster at the rate of 5-7% is also identified.      

Keywords

Sweet plaster, gypsum, physical characteristic, chemical characteristic, petrographical characteristic

References

• İzgi, U., “Architectural Process”, YEM Publications, Istanbul, (1999).
• Urak, G., Çelebil, G., “A research about Sweet Plaster applied at Traditional Houses of Beypazarı”, Gazi Uni. Faculty of Eng. Arch. Magazine, 20(3): 401-409 (2005).
• Tayla, H., “Construction System and Elements in Traditional Turkish Architecture”, TAC Foundation Publ., Istanbul, 255 (2007).
• Bulut, Ü., Tanacan, L., “Perlitin Pozzolanic Activitiy”, ITU Magazine, 8(1): 81-89 (2009).
• http://www.teknogips.com/tr/alci- hakkinda/index.php
• Kafesçioğlu, R., “Architecture should be based on basic culture”, Yalıtım Magazine, (2006).
• Törnük, T., “Face to face conversation with a gypsum master in Sivas province, Bingöl district locality”, (2009).
• Turkish Standard TS EN 13755 “Natural Stones- Experiment Methods-Water Absorption under Atmospheric Pressure”, Institute of Turkish Standards, Ankara, (2003).
• EN 1936, European Standard Natural Stone Test Methods. Determination of Real Density and Apparent Density, and of total and open Porosity. Brussels, (2006).
• Prasad, P.S.R., Pradhan, A., Gowd. T.N. “In situ micro-Raman investigation of dehydration mechanism in natural gypsum”, Current Science, 80(9): 1203-1207 (2001).
• Zussman, J.,” in Rock Forming Minerals: Sulphates, Carbonates, Phosphates and Halides” (eds Chang, L. L. Y., Howie, R. A. And Zussman, J.), Longman, Harlow, vol. 5B, (1996).
• Toulkeridis, T., Podwojewski, P., Clauer, N., “Tracing the source of gypsum in New Caledonia soils by REE contents and S-Sr isotopic compositions”, Chem. Geol., 145: 61–71 (1998).
• Gürdal, E., “A Research about Northern and Middle Anatolia Gypsums”, Doctorate Thesis, ITU Faculty of Architecture, Istanbul, (1976).
• Seufert, S., Hesse, C., Goetz-Neunhoeffer, F., Neubauer, J., ” Discrimination of bassanite and anhydrite III dehydrated from gypsum at different temperatures”, Z. Kristallogr. Suppl., 30 (2009) 447-452 / DOI 10.1524/zksu, (2009).
• Ramachandran, V.S., Ralph Paroli, M., James, M., Beaudoin, J., Ana, H.D., “Gypsum and Gypsum Products”, Handbook of Thermal Analysis of Construction Materials, 449-490 (2002).
• Ersoy, H.Y., “Composite of Gypsum Sponge Stone Glass Fiber”, ITU, Faculty of Civil Engineering, Istanbul, (1985).
• Artel, T., “Construction Material”, Kader Publication, Istanbul, 169 (1969).
• H. FhI für Holzforschung, Braunschweig, H.P. Brückner, “Changes in volume and density during the hydration of gypsum binders as a functionof the quantity of water available”. Universität Trier/ Germany, (Translation by Mr. Robin B. C. Baker), In ZKG International, 9: 522-529 (2001).
• Sayar, M., “Mineralogy and Jeology”, I.T.U. Pub., 148 (1949).