88333 ⎘
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; Granular materials, e.g. microballoons; Silica-rich materials; Silicates; Mica; Vermiculite; Mica or vermiculite modified by cation-exchange; chemically exfoliated vermiculate delaminated mica or vermiculite platelets