Geopolimeri nella conservazione dei materiali lapidei di interesse storico artistico: proposta di un metodo alternativo di produzione (Contributo in atti di convegno)

Type
Label
  • Geopolimeri nella conservazione dei materiali lapidei di interesse storico artistico: proposta di un metodo alternativo di produzione (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • S. Rescic, P. Plescia, E. Tempesta, F. Fratini, A. Mecchi, G.M. Zuppi (2011)
    Geopolimeri nella conservazione dei materiali lapidei di interesse storico artistico: proposta di un metodo alternativo di produzione
    in Atti del XXVII Convegno di Studi su Scienza e Beni Culturali “Governare l'innovazione, Bressanone
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. Rescic, P. Plescia, E. Tempesta, F. Fratini, A. Mecchi, G.M. Zuppi (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • This work concerns the first results of an experimental study for the synthesis of a new class of materials based on geopolymers to be used in the conservation of Cultural Heritage and in particular for the restoration of natural and artificial stone materials. Geopolymers are inorganic materials produced artificially in a process called \"geopolymerisation\" from aluminosilicates activated with alkaline oxides. Geopolymers can be produced with volcanic ash, tuff, pozzolan and artificial materials such as metakaolin, blast-furnace slag, etc.. These materials have proved to be particularly promising in various sectors (construction, ceramic, etc.). In our study we tried to activate the silicon-aluminates by mechanochemistry, to reduce the use of alkalis such as soda or potash that in the field of Cultural Heritage can be particularly harmful. To activate the materials it has been used a planetary mill to cause the complete amorphization of the crystal lattice. In this way the silicon and aluminium in the raw materials are more readily available to be extracted in aqueous solution. As raw material, quartz and kaolin have been selected, the first because of the simple composition and the second because widely used as a precursor of geopolymers. On the powders obtained in this way, an extraction in distilled water and in aqueous solutions at different pH has been done. In these solutions was then determined the content of Si and Al by ICP analysis. The analysis showed that solutions alternative to soda and potash can have a good extracting power able to provide a solutions sufficiently rich in Si and Al, then potentially useful as a strengthening product of degraded stone material. (literal)
Titolo
  • Geopolimeri nella conservazione dei materiali lapidei di interesse storico artistico: proposta di un metodo alternativo di produzione (literal)
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