Phd Degree / Doktora

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Access Right: Open AccessSubject: search.filters.subject.Historic sites--Conservation and restoration

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  • Doctoral Thesis
    Investigation of the Deterioration Problems of Excavated Andesite Monuments in Archaeological Sites for the Purpose of Conservation
    (Izmir Institute of Technology, 2015) Kaplan, Çağlayan Deniz; Böke, Hasan; Böke, Hasan
    Archaeological sites have to be preserved as the witnesses of the earliest human activities. Determination of deterioration processes of stone monuments in archaeological sites is one of the fundamental phases for their preservation. In this study, deterioration problems of excavated andesites from Aigai and Assos archaeological sites were investigated for the purpose of conservation. Within this intent, visual analysis of the andesite deteriorations was carried out with site surveys in four years intervals and basic physical, petrographic and microstructural properties, mineralogical, elemental and chemical compositions of interior parts and exterior surfaces of the andesites were determined and compared. Visual analyses at the sites show that the progress of andesite deterioration after excavation is insignificant during the four years. The experimental results indicated the slight chemical deterioration of the silica and ferromagnesian minerals and calcium-feldspars through the action of carbon dioxide and water during burial resulted in the formation of clay minerals and calcium carbonate and hematite patinas on the andesite surfaces respectively. Presence of clay minerals promotes physical, chemical and biological deterioration. The experimental results indicated that excavations can be carried out by preventive conservation measures to prevent further andesite deteriorations in open air conditions. As for the preventive conservation measures, the study suggests that the controlled drying of the andesites during excavations has to be supplied, clays on the stone surfaces have to be cleaned but but calcium carbonate layer have to be protected and biocides have to be implemented to prevent the biological formations. Site planning such as drainage to keep the water away from the monuments have to be supplied after their excavations.
  • Doctoral Thesis
    Architectural Design Characteristics of Protective Structures at Archaeological Sites and Their Impact on Conservation of Remains
    (Izmir Institute of Technology, 2013) Yaka Çetin, Necmiye Funda; İpekoğlu, Başak
    Protective structures are built to provide long term protection for the immovable cultural heritage against the possible damage that may arise from environmental conditions such as rain, wind and sun as well as the activities of the living like vegetation and uninvited animals. Most of the protective structures have been found to be inadequate to fulfill this purpose and conservation problems were observed on the remains under those structures. The inadequacies are mostly related to the architectural design of the protective structures. The aim of this study is to identify the architectural characteristics which have an impact on protective efficiency and how they are related to the deterioration factors. With this scope, sixteen protective structures that were selected from Turkey and abroad were analyzed through site surveys and literature studies. In order to identify and assess the role of protective structures on creating deterioration factors, this study groups the design characteristics under typology, structural system, roof system, roof material, façade system, façade material, thermal control system and drainage system and the deterioration factors under sources of water, instability of microclimate and the activities of the living. The relationship between these groups were analyzed and evaluated. As a result, the type of the protective structure as a shelter or an enclosure, selection of the design elements such as roof and façade systems as well as the materials, proper application of thermal control systems and drainage systems are the main characteristics of the design that determine the efficiency of the protective structures. The study will make important contributions to the theoretical and practical aspects of the design process of protective structures.