Method of making concrete from base metal smelter slag
OwnerDavid Krofchakinventor
Life of this patent
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Abstract
A method of making concrete from base metal smelter slag includes grinding the slag to a size within the range of from about -250 to about 425 mesh to produce ground slag cement, mixing the ground slag cement with Type 3 high early strength Portland cement in a ratio of at least about 0.5:1 by weight, and adding sand and stone to produce a concrete.
Claims2
A method of making concrete from base metal smelter slag produced by a nickel, copper, lead or zinc smelter, said slag containing (by weight) from about 15 to about 40% silica (SiO.sub.2), from about 35 to about 60% iron oxide (Fe.sub.2 O.sub.3), and from about 2 to about 20% calcium oxide (CaO), comprising:
- grinding the slag to a size within the range of from about -250 to about 425 mesh to produce ground slag cement,
- mixing the ground slag cement with Type 3 high early strength Portland cement in a ratio of from about 1.25:1 to about 1.75:1 by weight, and
- adding sand and stone to produce a concrete.
A method of making concrete from base metal smelter slag produced by a nickel, copper, lead or zinc smelter, said slag containing (by weight) from about 15 to about 40% silica (SiO.sub.2), from about 35 to about 60% iron oxide (Fe.sub.2 O.sub.3), and from about 2 to about 20% calcium oxide (CaO), comprising:
- grinding the slag to a size within the range of from about -250 to about 425 mesh to produce ground slag cement,
- mixing the ground slag cement with Type 3 high early strength Portland cement in a ratio of at least about 1.25:1 and up to about 2.5:1 by weight, and
- adding sand and stone to produce a concrete.
Dependencies are inferred from the claim text.