Settable composition containing cement kiln dust
OwnerRonald Lee Barbourinventor
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Abstract
The present invention relates to settable compositions for general purpose concrete construction containing Class-F fly ash, Class-C fly ash or slag, and cement kiln dust (CKD) as a substantial replacement for Portland cement conventionally used in such compositions. The compositions of the present invention provide high early strength thereby allowing the concrete structure to be put into service sooner, reducing labor cost, and allowing precast concrete and concrete masonry manufacturers to achieve rapid form and mold turnover.
Claims48
A settable composition comprising cement, Class-F fly ash, Class-C fly ash, and cement kiln dust (CKD).
A settable composition comprising cement, Class-F fly ash, slag, and cement kiln dust (CKD), wherein the cement is present in an amount greater than about 50 percent by weight.
A settable composition comprising cement, slag, and cement kiln dust (CKD), wherein the CKD is present in an amount of about 1 percent to 9 percent by weight.
A settable composition comprising cement, Class-C fly ash, slag, and cement kiln dust (CKD) wherein the cement is present in an amount greater than about 50 percent by weight.
Dependencies are inferred from the claim text.