Lightweight concrete roof tiles
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United States of America Patent
Stats
-
Jun 16, 1987
Grant Date -
N/A
app pub date -
Jan 9, 1985
filing date -
Aug 24, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Lightweight concrete roof tiles are produced by extruding a cement/lightweight aggregate/water mix containing a non-thixotropic silica fume in a weight ratio of silica fume (calculated as dry weight) to cement of about 2:98 to about 25:75, preferably about 8:92 to about 12:88. The presence of non-thixotropic silica fume in the mix enables lightweight roof tiles of adequate flexural strength to be obtained from the mix by extrusion. Novel cement/lightweight aggregate/water mixes containing non-thixotropic silica fume and novel roof tiles prepared therefrom are also described.
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Cited Art Landscape
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