88382 ⎘
Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Fibrous materials; Whiskers; Rock wool ; Ceramic or silicate fibres; Silicates other than zircon Polysilicates, e.g. geopolymers