Mixture for manufacture of shaped elements and its use
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United States of America Patent
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-
Jan 10, 1989
Grant Date -
N/A
app pub date -
May 26, 1987
filing date -
Jun 2, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The mixture for manufacture of shaped elements of fiber-cement, in addition to minimum 5% by weight of pozzuolanic silicic acid contains also an amount of limestone powder. With this mixture it is possible to obtain a product of high strength properties without tendency to embrittlement respectively to formation of cracks on the surface. In utilizing the mixture for manufacture of shaped elements the latter are moulded from a mixture of aqueous material and permitted to set at 70.degree. to 90.degree. C. during 5 to 12 hours preferably with simultaneous compression.
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