Binder based on activated ground granulated blast furnace slag useful for forming a concrete type material
AssigneeStephan Steinkeller
InventorGerhard Koch
Life of this patent
Estimating the term…
Abstract
A binder material useful for forming a concrete type material includes, calculated on a dry, water and carbon dioxide free basis, a base component constituting 50-95 wt % of the binder material, the base component having ground granulated blast furnace slag and an activator component constituting 5-50 wt % of the binder material. The activator component includes aluminum sulfate and a sodium hydroxide generating compound. The final binder material includes, calculated on a dry, water and carbon dioxide free basis, ground granulated blast-furnace slag 35-95 wt %, aluminum sulfate AI2(SO4)3 1-25 wt %, and sodium hydroxide generating compound 4-35 wt %.
Claims13
A concrete material, wherein it comprises a binder material and an aggregate material, wherein the binder material comprising, calculated on a dry, water and carbon dioxide free basis;
- i) a base component constituting 50-95 wt % of the binder material, said base component comprising ground granulated blast furnace slag, wherein the base component comprises at least 20 wt % aluminum oxide, Al2O3, calculated on a dry, water and carbon dioxide free basis, and ii) an activator component constituting 5-50 wt % of the binder material, said activator component comprising:
- a. aluminum sulfate, and
- b. sodium hydroxide generating compound, said sodium hydroxide generating compound comprising sodium carbonate, Na2CO3, and calcium oxide, CaO,
- wherein the binder material comprises, calculated on a dry, water and carbon dioxide free basis;
- ground granulated blast furnace slag:
- 35-95 wt %
- aluminum sulfate, Al2(SO4)3:
- 1-25 wt % and
- sodium hydroxide generating compound:
- 4-35 wt %.
Dependencies are inferred from the claim text.