Vermiculites 7
Vermiculites 7 : A group of low grade micas (or hydrous silicates) which expand and exfoliate on heating to a light, water-absorbent material. Used in the exfoliated form as heat and sound insulating materials, in special potting soils, in lightweight aggregates, and as a filler in rubber and cement paints. Used in stanchions, with a hollow steel section, with or without a concrete infill and incorporating a thin outer sleeve in mild or stainless steel filled with vermiculite/cement compound to improve fire resistance
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