Slag cement
AssigneeSlagcem LLC
InventorLawrence Hoffis
Life of this patent
Estimating the term…
Abstract
A slag cement includes ground granulated blast furnace slag and ground limestone combined in a predetermined weight ratio. Limestone and granulated blast furnace slag (GBFS) are fed to a grinding apparatus in a ratio of about 3-5% limestone by weight. The limestone is a cheaper raw material than the GBFS, resulting in a reduction in production costs for the slag cement. Moreover, the addition of limestone to the GBFS surprisingly results in improved compressive strength.
Claims11
A method for producing a slag cement comprising the steps of:
- providing a supply of granulated blast furnace slag (GBFS);
- providing a supply of limestone;
- combining the GBFS and limestone in a predetermined ratio;
- and
- grinding the GBFS and limestone to cement fineness.
A method for producing a slag cement comprising the steps of:
- providing a supply of granulated blast furnace slag (GBFS) ground to a cement fineness;
- providing a supply of limestone ground to a cement fineness;
- and
- combining the ground GBFS and ground limestone in a predetermined ratio suitable for use as a cement.
A slag cement comprising ground granulated blast furnace slag (GGBFS) and about 3-15% by weight ground limestone.
Dependencies are inferred from the claim text.