C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/117, 261/66
C04B 7/32 (2006.01) B29C 33/38 (2006.01) C04B 22/02 (2006.01) C04B 22/04 (2006.01) C04B 22/06 (2006.01) C04B 22/16 (2006.01) C04B 28/00 (2006.01) C04B 35/66 (2006.01)
Patent
CA 2039467
Concrete composition or the manufacture of moulds, mould and process for the manufacture of a mould ---------------------- ABSTRACT -------- Compound concrete composition for the manufacture of moulds, c o m p r i s i n g : (1) a binder which comprises an alkaline-earth mineral sub- stance, a constituent made up of fine particles of a compoune other than an oxide, 90% of which have a particle size of between 1 and 150 µm with a median diameter of between 3 and 20 µm, these fine particles comprising particles of a substance which has a thermal conductivity higher than approximately 30 W/mK, chosen from silicon carbides, silicon carbonitrides, silicon nitrides, boron carbides, titanium carbides and tungsten carbides and a constituent made up of ultrafine particles at least 70% of which have a particle size smaller than 1 µm with a median diameter of between 0.3 and 0.8 µm, (2) water optionally with the addition of a dispersant, and (3) fillers comprising metal granulates and metal fibres, wherein the water/binder ratio is lower than 0.20 and the concrete composition has a thermal conductivity at 200°C which is equal to or higher than 5 W/m K. Figure nil -
Schoennahl Jacques
Thiery Jacques
Fetherstonhaugh & Co.
Savoie Refractaires
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