Cementitious composite material with vacuum integrity at elevated temperatures
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United States of America Patent
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-
Jan 2, 1990
Grant Date -
N/A
app pub date -
Nov 21, 1984
filing date -
Nov 21, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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