Method of milling the Portland clinker for the production of gypsumless Portland cements
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United States of America Patent
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Jun 30, 1992
Grant Date -
N/A
app pub date -
Mar 30, 1990
filing date -
Mar 30, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for milling Portland clinker for the production of gypsumless Portland cements is provided. The method comprises milling the Portland clinker in the presence of 0.01 to 0.05 weight % of a synthetic, organic, surface-active substance with wetting properties that is stable in an alkaline medium of pH 9-12, with the exception of the triethanolamide of dodecylbenzylsulphonic acid, to produce gypsumless Portland cements with specific surfaces of 350-750 m.sup.2 /kg.
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