Class F. fly ash containing settable composition for general purpose concrete having high early strength and method of making same
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United States of America Patent
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Nov 30, 1993
Issued Date -
N/A
app pub date -
Oct 13, 1992
filing date -
Aug 8, 1988
priority date (Note) -
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Abstract
In general purpose concrete compositions, from about 10% but less than about 25% by wt of the usual amount of portland cement for such compositions is replaced with Class F fly ash and cement kiln dust, both abundant and inexpensive waste products, in the weight ratio of such fly ash to cement kiln dust of about 3:1-1:1 with a minimum of about 5% of the replaced portland cement being cement kiln dust. General purpose concrete prepared from these mix compositions exhibit early strength characteristics, especially from day 1 to day 3, generally equal to or better than those exhibited by comparable all portland cement mix compositions.
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