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US 4,373,957 AGranted
Fibre-reinforced cementitious product
AssigneeRockwool International A/S
InventorPeder Pedersen
Life of this patent
Estimating the term…
Abstract
A fibre-reinforced cementitious product comprising a cementitious matrix reinforced with a combination of hemp fibres and mineral fibres, the combination of fibres constituting from 3 to 13% by weight of the cementitious product.
Claims7
A fibre-reinforced cementitious product comprising a matrix of cementitious material and 3 to 13% by weight, based on the total weight of the cementitious product, of a fibrous material comprising a mixture of rock wool fibers and a sufficient amount of hemp fibers to provide a final product having an average minimum bending strength of 176.+-.17 kg/cm.sup.2 at 1.7 g/cm.sup.3.
Dependencies are inferred from the claim text.