GLASS FIBRE REINFORCED CEMENTITIOUS PRODUCTS

摘要

An alkali-resistant mineral fibre for use as a reinforcement in cementitious products and its method of production are disclosed. The method comprises forming a melt having a composition within the range by weight of about 20 to 30% CaO, about 15 to 20% MgO and the balance SiO2, at a temperature of about 35 to 100 Celcius degrees above the melting point of the composition, atomizing the melt with high pressure air or steam to form fibres, and cooling the fibres for collection. The melt can be formed from the mineral diopside alone or diopside with at least one of up to 10% by weight of sandstone or quartz and up to 20% by weight dolomite.