Asbestos-free building material plates and method of making same
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United States of America Patent
Stats
-
Feb 28, 1989
Grant Date -
N/A
app pub date -
Nov 15, 1985
filing date -
Mar 15, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A building material plate formed by compression in the hydration-water moist state and having quality features resembling asbestos-reinforced cement and made of an asbestos-free material mixture having up to 30 vol. % of cellulose fiber proportions in the high-packed state of a diameter spectrum D.sub.C, singly bound into a hydration binder particle mixture still present in the moist forming state of a grain size-main distribution spectrum D.sub.o within the ratio range 0.9.ltoreq.D.sub.C /D.sub.o .ltoreq.1.1, which in case of a participation of cement in the binder contains special additives showing a pozzuolana reaction for securing constancy in longterm quality.
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