Patent ID: 6620487
Filing Date: 2003-09-16
Classification: B32B,C04B,E04C,E04F,Y02W,Y10T

Abstract:
A reinforced panel for resisting shear loads when fastened to framing comprising: a continuous phase resulting from the curing of an aqueous mixture of reactive powders comprising, on a dry basis, 35 to 75 wt. % calcium sulfate alpha hemihydrate, 20 to 55 wt. % hydraulic cement, 0.2 to 3.5 wt. % lime, and 5 to 25 wt. % of an active pozzolan, said continuous phase being uniformly reinforced with alkali-resistant glass fibers and containing uniformly distributed ceramic microspheres, said spheres having an average diameter of about 10 to 500 microns (micrometers), said panel having a shear rating of at least 720 lbs/ft (1072 kg/m) when a 0.5 inch (12.7 mm) thick panel tested according to ASTM E72 test method using 8d common nails as fasteners with a fastener spacer of 6 inches (152 mm) on center at the perimeter and 12 inches (304 mm) on center on the intermediate studs.