C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/105, 261/59
C04B 38/08 (2006.01) C04B 28/02 (2006.01) E04D 1/04 (2006.01)
Patent
CA 1234585
Abstract Lightweight concrete roof tiles Lightweight concrete roof tiles are-produced using 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. A dispersing agent for the silica fume is included in the mix. The presence of non-thixotropic silica fume in the mix enables lightweight roof tiles of adequate flexural strength to be produced. Novel roof tiles and novel cement/lightweight aggregate/water mixes for use in the method re also described.
489305
Hack Richard C.
Wood John W.m.
Fetherstonhaugh & Co.
Marley Tile A.g.
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