V. Brunello, D. Bersani, L. Rampazzi, A. Sansonetti, C. Tedeschi
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Gypsum based mixes for conservation purposes: evaluation of microstructural and mechanical features
This paper presents the study of four gypsum mixtures, focusing on the role of both inorganic and organic additives and on the micro-structural features and mechanical properties. Additives have been chosen among those most reported in historical recipes, for example magnesia, lime putty, rabbit glue. The selected mixes refer to gypsum-based materials used in artworks manufacture, such as plasters, mouldings, stuccoworks, pastiglia . Blank reference materials were prepared on purpose according to the specific recipe, in order to verify the final composition and to highlight the hardening mechanisms and the formation of setting compounds. The chemical composition was related to workability properties and final mechanical resistance and the action of additives as retardants was studied with interesting results. For instance, MgO imparts good properties to the mechanical features, especially with regard to the compressive strength characteristics.
期刊介绍:
Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on:
- Physics and chemistry of the formation of cement and other binders.
- Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties.
- Durability and corrosion of other construction materials.
- Restoration and conservation of the materials in heritage monuments.
- Weathering and the deterioration of construction materials.
- Use of industrial waste and by-products in construction.
- Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2