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A reinforced, lightweight, dimensionally stable panel capable of resisting shear loads when fastened to framing equal to or exceeding shear loads provided by plywood or oriented strand board panels. The panels employ a core of a continuous phase resulting from the curing of an aqueous mixture of cal

A reinforced, lightweight, dimensionally stable panel capable of resisting shear loads when fastened to framing equal to or exceeding shear loads provided by plywood or oriented strand board panels. The panels employ a core of a continuous phase resulting from the curing of an aqueous mixture of calcium sulfate alpha hemihydrate, hydraulic cement, an active pozzolan and lime, the continuous phase being reinforced with alkali-resistant glass fibers and containing ceramic microspheres, or a blend of ceramic and polymer microspheres, or being formed from an aqueous mixture having a weight ratio of water-to-reactive powder of 0.6/1 to 0.7/1 or a combination thereof. At least one outer surface of the panels may include a cured continuous phase reinforced with glass fibers and containing sufficient polymer spheres to improve nailability or made with a water-to-reactive powders ratio to provide an effect similar to polymer spheres, or a combination thereof.

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A reinforced, lightweight, dimensionally stable panel capable of resisting shear loads when fastened to framing equal to or exceeding shear loads provided by plywood or oriented strand board panels. The panels employ a core of a continuous phase resulting from the curing of an aqueous mixture of cal

A reinforced, lightweight, dimensionally stable panel capable of resisting shear loads when fastened to framing equal to or exceeding shear loads provided by plywood or oriented strand board panels. The panels employ a core of a continuous phase resulting from the curing of an aqueous mixture of calcium sulfate alpha hemihydrate, hydraulic cement, an active pozzolan and lime, the continuous phase being reinforced with alkali-resistant glass fibers and containing ceramic microspheres, or a blend of ceramic and polymer microspheres, or being formed from an aqueous mixture having a weight ratio of water-to-reactive powder of 0.6/1 to 0.7/1 or a combination thereof. At least one outer surface of the panels may include a cured continuous phase reinforced with glass fibers and containing sufficient polymer spheres to improve nailability or made with a water-to-reactive powders ratio to provide an effect similar to polymer spheres, or a combination thereof. Compounds on Fe and Steel in HC1 media," Corrosion Science, vol. 33, No. 9, pp. 1439-1453, Sep., 1992, UK. Chemical Abstracts, vol. 126, No. 3, Jan. 20, 1997, Columbus, Ohio, abstract No. 34170, Gorski et al.; "Brake Fluid" & PL 166 099 A. Tanno et al., "The Corrosion of Carbon Steel in Lithium Bromide Solution at Moderate Temperatures," Corrosion Science, vol. 34, No. 9, pp. 1441-1451, Sep., 1993. Chemical Abstracts, vol. 94, No. 10, Mar. 1981, p. 245, abstract No. 69499c, H.P. Batroff et al., "Inhibition of pitting corrosion by heteropoly acids," Ann. Univ. Ferrara, Sez. 5 Suppl., 1980, 7 (vol. 4, Eur. Symp. Corros. Inhibitors, 5th), pp. 1103-1110. Japanese Patent Abstract 5-214326, Aug., 1993. Grant & Hackh's Chemical Dictionary, p. 282, definition of "heteropoly acids", 1987, no month available. Chem. Ab. AN 121:25617, Pak et al., "Solid-Phase Redox Reaction of 12th Series Heteropoly Acids," 69(4), pp. 617-619, 1994, no month available.