Building board
First Claim
1. An asbestos-free building board or like product which can be used to provide a fire-resisting structure, made from a composition which comprises water-settable binder, reinforcing fibers including organic fibers and exclusive of asbestos fibers, and vermiculite in amount sufficient to confer fire-resistant properties to the product, said vermiculite being present in amount of about 12% to 50% by weight of the product.
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Accused Products
Abstract
A composition suitable for the manufacture of shaped articles comprising (i) a water-settable inorganic binder which is one or more of a calcium silicate binder, Portland cement, aluminous cement, and blast furnace slag cement, and (ii) fibrous reinforcing material, wherein the fibrous reinforcing material is free from asbestoc fibres and includes organic fibres which do not melt below 140° C.
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Citations
15 Claims
- 1. An asbestos-free building board or like product which can be used to provide a fire-resisting structure, made from a composition which comprises water-settable binder, reinforcing fibers including organic fibers and exclusive of asbestos fibers, and vermiculite in amount sufficient to confer fire-resistant properties to the product, said vermiculite being present in amount of about 12% to 50% by weight of the product.
- 9. An asbestos-free building board or like product which can be used to provide a fire-resisting structure, made from a composition which comprises a water-settable binder, reinforcing fibers including at least 5% by weight thereof as organic fibers and exclusive of asbestos fibers, and vermiculite, said binder being present in an amount of 80-89% by weight of binder plus reinforcing fiber, and said vermiculite being present in amount of about 12% to 50% by weight of the product.
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12. The method of making an asbestos-free building board which can be used to provide fire-resisting structures, which comprises the steps of:
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(a) forming an aqueous slurry comprising a water-settable binder, reinforcing fibers including at least 5% by weight cellulosic fibers and exclusive of asbestos fibers, vermiculite and water, said binder being present in an amount of 50-99%, by weight, based on the total of binder and reinforcing fiber, and said vermiculite being present in amount of about 12% to 50% by weight of total solids; (b) dewatering said slurry to form a sheet; and
then(c) curing said sheet to form the building board. - View Dependent Claims (13, 14, 15)
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Specification