Reinforced cement sheet product containing no asbestos for fabricating on hatschek machine
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United States of America Patent
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-
Jan 31, 1984
Grant Date -
N/A
app pub date -
Feb 11, 1981
filing date -
Feb 11, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fiber-cement product which is capable of being formed on a Hatschek machine consisting essentially of a Portland cement binder in the amount of between about 40% and 80% by weight, natural and/or synthetic fibers in an amount of between about 1% and 15% by weight, clay in an amount of between about 2% and 15% by weight, and poly(ethylene oxide) homopolymer in an amount of between about 0.03% and 0.5% by weight. The product may also contain silica and/or filler in an amount of between 10% and 40% by weight. The silica is generally used in a product which is to be autoclaved. The filler may be waste fiber-cement product or inert filler material.
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