Ceramic World Review 141/2021

Page 109

technology

silica concentration. To measure the fraction of fine crystalline silica, a method called “Size Weighted Fine Fraction (SWeRF)” developed by the European Committee for Standardization is used. The method involves conducting a particle size analysis of the

Per misurare la frazione di silice cristallina fine, si usa il metodo “Size Weighted Fine Fraction (SWeRF)” sviluppato dal Comitato Europeo per la Standardiz-

zazione. Il metodo prevede l’analisi granulometrica della polvere con calcolo teorico in base alla funzione di probabilità della norma EN 481 e l’analisi

FIG. 1 - SWeRFcs CALCULATION SHEET OF ESF 501 0GG FELDSPAR Calcolo SWeRFcs del feldspato ESF 501 0GG

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