La reconstrucción volumétrica de material óseo arqueológico: Caracterización de las propiedades físico-mecánicas de los estucos más empleados e investigación de nuevas masillas de relleno para su conservación y restauración
One of the most sensitive and fragile materials to proceed within the field of conservation and restoration, in the area of archeology, are skeletal remains. This is fundamentally because its hygroscopicity and anisotropy, as the fluctuations in humidity and temperature produce structural changes. A...
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| Formato: | tesis doctoral |
| Fecha de publicación: | 2017 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | español |
| OAI Identifier: | oai:riunet.upv.es:10251/90550 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/90550 |
| Access Level: | acceso abierto |
| Palavra-chave: | reintegración estuco masilla óseo arqueológico restauración conservación PINTURA |
| Resumo: | One of the most sensitive and fragile materials to proceed within the field of conservation and restoration, in the area of archeology, are skeletal remains. This is fundamentally because its hygroscopicity and anisotropy, as the fluctuations in humidity and temperature produce structural changes. Although mainly nowadays, the volumetric reinstating is carried out when the pieces require structural reinforcement. These performances have changed over time and the different intervention criteria by "restorers" throughout history. To identify the parts added, the fracture filler and the joining fragments, the most used materials are plasters, paraffin waxes, I76 wax and Polyfilla® de interior reinforce with resin aqueous emulsion, they are more employed and suitable restoration of ceramics. It has been observed recently that the application of fillers were elaborated with inert loads agglutinated with acrilyc resin such as Paraloid¿ B-72 y Acril® 33, and epoxy fillers employed in the reintegration of wood objects such as el Balsite® or el Araldit ® Madera. Given the variety of filler reintegrators, it is considered that many of these materials are still applied based on a trial and error method as it takes a long time to verify its adequacy against the original material. A sample of this are the craquelures, fissure and detachments between the filler material and the original material such as the tensions caused by environmental fluctuations. In addition to the mechanical issues, chromatic alterations of pigments and resins have also produced aesthetic incompatibilities that involved urgent actions. The purpose of this research is to create fillers to adapt it adequately to dimensional changes of bone material. And in addition, that complies with the majority of requirements as soon as stability, reversibility and compatibility among others. For this purpose, the study has focused to compare a selection of common fillers for volumetric reconstruction of the bones with new experimental recipes. With the objective of making fillers softer than the original material without contributing with excessive weight to bony parts, formulations have been carried out from acrylic and vinyl resins. They are employed, as adhesives and consolidators in the field of restoration, as binders of different inert fillers and hollow glass microspheres Q-CEL® 5020FPS. For the characterization of the mechanical properties and its stability against the ageing of the fillers, physical mechanical tests and accelerated aging treatments of humiditytemperature and Ultraviolet radiation have been performed. The results of chromatic and morphological changes and control the splits in the joints with the bone material are quantified. Thanks to the results obtained, the different fillers have been evaluated and cataloged, providing information for future interventions in the field of conservation and restoration in bone materials and other archaeological materials. |
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