Zeolitic tuffs as raw materials for lightweight aggregates (Contributo in atti di convegno)

Type
Label
  • Zeolitic tuffs as raw materials for lightweight aggregates (Contributo in atti di convegno) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • Dondi M., Cappelletti P., Cerri G., de' Gennaro M., de' Gennaro R., Langella A. (2004)
    Zeolitic tuffs as raw materials for lightweight aggregates
    in 8th Conference of the European Ceramic Society, Istanbul (Turkey), June 29-July 3, 2003
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Dondi M., Cappelletti P., Cerri G., de' Gennaro M., de' Gennaro R., Langella A. (literal)
Pagina inizio
  • 1431 (literal)
Pagina fine
  • 1434 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 264-268 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 CNR-ISTEC, via Granarolo 64, 48018 Faenza, Italy 2 Dip. Scienze della Terra, Univ. Federico II, Via Mezzocannone 8, 80138 Naples, Italy 3 Ist. Scienze Geologico-Mineralogiche, Univ. Sassari, Corso Angioj 10, 07100 Sassari, Italy 4 Società Italiana Zeoliti,Via Pescarolo 1, 41040 Pigneto, Italy 5 Dip. Studi Geologici ed Ambientali, Univ. del Sannio, Via Port'Arsa 11, 82100 Benevento, Italy (literal)
Titolo
  • Zeolitic tuffs as raw materials for lightweight aggregates (literal)
Abstract
  • The possible use of zeolitic rocks for the production of lightweight aggregates was assessed, investigating both the expansion at high temperature and the technological features of fired products. Eighteen zeolite-bearing rocks from Sardinia, Campania and Tuscany (Italy) were taken into account. The firing expansion depends mainly on the chemical composition (especially silica and fluxing oxides) and the water content (largely related to the zeolite amount). Other relevant parameters are the temperature of maximum expansion (1350-1500°C, without additives) and soaking time (2-5 minutes). Some products are highly impervious (water absorption <1%) and exhibit a considerable firing expansion (>100% vol.), a low bulk density (0.5-0.7 g×cm-3) and fair technical properties (loose weight and strength of particles). These encouraging results make some of the investigated tuffs interesting raw materials for the production of lightweight aggregates. (literal)
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