EVALUATION OF SIVAS TRADITIONAL â??SWEET PLASTERS"

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

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