Traditional gypsum renders in the Paris area: focus on a particular typology
| Autor: | Jean Ducasse-Lapeyrusse, Véronique Vergès-Belmin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Calcite
Gypsum 0211 other engineering and technologies Mineralogy 02 engineering and technology Building and Construction engineering.material chemistry.chemical_compound chemistry Mechanics of Materials 021105 building & construction engineering General Materials Science Mercury intrusion porosimetry Focus (optics) Quartz Geology Civil and Structural Engineering Lime |
| Zdroj: | Materials and Structures. 54 |
| ISSN: | 1871-6873 1359-5997 |
| Popis: | This study aims to characterize the “Parisian” traditional gypsum renders in order to understand its former fabrication process. A large sampling campaign covering the historical region of Paris and all building typologies from the sixteenth century to the early twentieth century was conducted. This paper presents the results obtained on the most typical gypsum render typology, which we identified as “Parisian.” Cross-sections of the renders were first observed with the naked eye and then under the microscope to characterize the number, thickness, and grain sizes of their layers. X-ray diffraction analysis and mercury intrusion porosimetry were performed on each render layer and the proportion of each crystalline phase was estimated using the Rietveld method. Calcite and quartz contents are low and vary from building to building and even between two layers in a single render. Gypsum appears to be the main component as only calcined gypsum was used to prepare the renders. The different layers were made from a single coarse calcined gypsum powder, sieved at different grain sizes, and mixed with water without any addition of lime or aggregates. |
| Databáze: | OpenAIRE |
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