Cement, method of preparing such cement and method of making products using such cement
AssigneeEerste Nederlandse Cement Industrie (ENCI) N. V.
InventorsSeratius J. P. Brouns, Willem van Loo
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Abstract
A cement based on blast-furnace slag and fly ash, characterized in that the cement is a homogeneous dry particulate mixture in ready-to-use form, which comprises blast-furnace slag having a specific surface area of 500-650 m.sup.2 /kg and fly ash in a weight ratio in the range of 20/80-60/40, and further comprises the following components in the amounts indicated, calculated on the total mixture: at least 2% by weight of portland cement clinker and 2-12% by weight of sodium silicate (calculated as Na.sub.2 O+SiO.sub.2).
Claims9
A cement based on blast-furnace slag and fly ash, wherein the cement is a homogeneous dry particulate mixture in ready-to-use form, which comprises blast-furnace slag having a specific surface area of 500-650 m.sup.2 /kg and fly ash in a weight ratio in the range of 20/80-60/40, and further consisting essentially of the following components in the amounts indicated, calculated on the total mixture:
- ______________________________________ portland cement clinker at least 2 wt. % sodium silicate (calculated as Na.sub.2 O + SiO.sub.2) 2-12 wt. % ______________________________________
A method of preparing a cement consisting essentially of characterized by grinding the blast-furnace slag and the portland cement clinker to obtain a dry product having the desired fineness, and subsequently preparing the cement by mixing the constituent components in particulate form in the desired proportions at a temperature not exceeding 50.degree. C., and optionally incorporating other additives according to need during said grinding and/or mixing treatments.
Dependencies are inferred from the claim text.