Settable composition for general purpose concrete and method of making same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 28, 1996
Issued Date -
N/A
app pub date -
Oct 27, 1993
filing date -
Aug 8, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
From about 25% to about 50% but not more than about 200 lbs of the Portland cement of a general purpose concrete mix which contains for each cubic yard of the concrete to be produced in generally homogeneous admixture about 400-750 lbs. portland cement, about 1600-2000 lbs. coarse aggregate of a size of at least about 3/8 inch, and sufficient fine aggregate of a size less than 3/8 inch and up to minor amounts of conventional additives to yield one cubic yard when the admixture is combined with water in an amount equal to about 40-70% by weight of said portland cement, is replaced with a) Class F fly ash having a calcium oxide content up to about 6% and b) cement kiln dust (CKD) in a weight ratio of fly ash to CKD of about 2:3-3:2. Preferably, 30% or more of the Portland cement is replaced.
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