Research One Limited Partnership

Cemcom Corporation

Mark L MacKenzie

Sean Wise

Randall P Bright

The temperatures at which the cementitious composite materials described in U.S. Pat. No. 4,482,385 can be used as tool or mold materials are extended by a treatment which comprises heating said composite materials to a temperature sufficient to expel free and adsorbed water from the concrete portion of the cementitious composite and thereafter refilling the resulting pores with an organic monomer or prepolymer and then crosslinking said impregnant to form an organic polymeric network in the inorganic composite material.

Cementitious composite material with vacuum integrity at elevated

The strength of the stainless steel containing cementitious composite material of U.S. Pat. No. 4,482,385 is improved by curing it according to a specific schedule which includes the steps of curing in a mold, steam curing after demolding, slow drying and dry thermal curing.

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Laurel, MD, United States of America

Mark L MacKenzie