OPTIMITZACIÓ DE MÈTODES MULTITÉCNICA PER A LA CARACTERITZACIÓ DE COMPONENTS ORGÀNICS I MORTERS DE CALÇ TRADICIONALS DE L&apos
[EN] The present research suggests, on one hand, optimizing a multi-technical method for the characterization of organic compounds and traditional lime mortars to use in monumental buildings of antiquity. To illustrate the effectiveness of this methodology it has been applied to a study case, the st...
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| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | español |
| OAI Identifier: | oai:riunet.upv.es:10251/61385 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/61385 |
| Access Level: | acceso abierto |
| Palabra clave: | Mètodes multitècnica Components orgànics Morters de calç Additius orgànics naturals PINTURA |
| Sumario: | [EN] The present research suggests, on one hand, optimizing a multi-technical method for the characterization of organic compounds and traditional lime mortars to use in monumental buildings of antiquity. To illustrate the effectiveness of this methodology it has been applied to a study case, the stucco from mural painting of Maya culture (Ancient Mesoamerica), which has been chosen by the need to continue studying the composition of preparation layers of these stuccos. There are two reasons for this choice: the first one is that knowledge of materials and of execution techniques of these surfaces is providing new data to understand the technological complexity of this culture; and the second one is based on the fact that just this type of research will allow us to know with certainty how these preparation layers were made and, this way, ensure the correct interventions of conservation and restoration. From these considerations, the study conducted establishes a methodological approach that comes from the specialized literature search of geographical and cultural context, the physical (geology and climatology) and biological environment (flora and vegetation) from Yucatan Peninsula (Mexico), getting theoretical knowledge necessary to deal with a detailed description and characterization of the raw materials from the geological environment that were used in the manufacture of the preparation layers from Maya mural painting. The method continues with the use of instrumental analysis techniques such as optical microscopy (OM), polarizing optical microscopy (POM), infrared Fourier transform spectroscopy (FT-IR), x-ray diffraction (XRD), scanning electron microscopy-x-ray microanalysis (SEM-EDX), x-ray microdiffraction (µ-XRD), transmission electron microscopy (TEM) and the optimization of instrumental techniques for analyzing organic compounds, such as gas chromatography/mass spectrometry (GC/MS). On the other hand, the current researches tend to reinforce the idea of incorporating organic components to the cementitious matrix of historical mortars. There is a debate about whether these additives modify the fresh mortar properties and if they also improve the hardened mortar properties. In this study is suggested the development of a method of making lime mortars with an application in the field of restoration, to provide adequate quality control over their constituents. To do this, it has been used an experimental research of air lime mortar paste to which cementitious matrix, two natural organic additives of vegetable origin in different proportions have been incorporated, so changes in its behavior related to the main rheological, hydraulics and physical-mechanical properties of the mortar can be assessed, as ecological and sustainable alternative to non-biodegradable and irreversible synthetic resins, and to ensure greater compatibility with the original materials. |
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