Glass fibers resistant to basic media and their application to reinforcing of cement
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United States of America Patent
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May 30, 1989
Grant Date -
N/A
app pub date -
Jan 28, 1986
filing date -
Feb 12, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to glass fiber compositions and fibers having use as a reinforcement element of cement-base products. As such, the composition is able to resist attack of strongly basic media. The fibers of the invention comprise the following constituents, in proportions by weight: SiO.sub.2 --56 to 68%, ZrO.sub.2 --14 to 17%, Na.sub.2 O--12 to 20%, K.sub.2 O--0 to 8%, Al.sub.2 O.sub.3 --1 to 9%, and wherein the sum of Na.sub.2 O and K.sub.2 O is between 14 and 22%, and wherein the sum of SiO.sub.2 and Al.sub.2 O.sub.3 is less than 70%.
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