Portland cement clinker and use thereof
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United States of America Patent
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-
Dec 22, 1998
Grant Date -
N/A
app pub date -
Jul 18, 1997
filing date -
Nov 23, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Portland cement clinker free of C.sub.4 A.sub.3 S having the following proportions of clinker phases, in % by wt.: --C.sub.3 S: 40 to 80 --C.sub.4 AF: <20 --C.sub.2 S: <30 --C.sub.3 A: <20 and a SO.sub.3 content from 1.0 to 3.0% by wt., based on the clinker, obtained by burning a mixture of raw materials containing CaO, SiO.sub.2, Al.sub.2 O.sub.3, Fe.sub.2 O.sub.3 and an additive containing SO.sub.3 at temperatures from 1200.degree. to 1350.degree. C. centigrade, the use thereof and a Portland cement.
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