C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/153 (2006.01) C04B 7/19 (2006.01) C04B 14/38 (2006.01) C04B 28/08 (2006.01)
Patent
CA 2093319
2093319 9206048 PCTABS00011 The invention relates to a method of improving the activation of latently hydraulic granulated basic blast-furnace slag in the manufacture of building materials. Known activating methods can be improved by a combination of activating agents, whereby the latently hydraulic slag is converted to a directly-acting hydraulic binder, which together with water and aggregate, such as sand and gravel, will produce a concrete of high tensile and high compression strength, and also a concrete which has good chemical resistance to attack by salt, sulphates and chlorides, and which is heat-resistant to temperatures up to 1000 ·C. Activation is also able to eliminate the negative effect of aging. The improved activation is achieved by adding to the concrete mix a limited amount of alkali, a limited amount of Portland cement and optionally calcium oxide and amorphous silica powder, and an activator which includes magnesium oxide and phosphate.
Kurz Fredrik W. A.
Smart & Biggar
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