Loading patent…
AssigneeSteag Aktiengesellschaft
InventorsDieter Heese, Gerhard Hausberg, Hans Lehmann, Hans-Joachim Schmidt, Klaus Goldschmidt, Kyaw Than
Estimating the term…
Concrete, especially for producing concrete blocks of high compressive strength, is formed from a hydraulic binder and an improved aggregate which consists of 0.1:1 to 1:0.1 parts of a sludge to comminuted slag. The sludge is a calcium-containing product of the scrubbing of the flue gases of a fossil-fuel boiler, preferably of a power plant, while the slag can be melting-chamber slag or ash obtained from the furnace. The composition may also contain sand or gravel. It is combined with water, to be cast into cement blocks of high compressive strength. Low proportions of the hydraulic binder are required with the improved aggregate.
A process for producing concrete blocks of high-compressive strength comprising the steps of:
A concrete comprising an aggregate which consists of a mixture of a sludge settled from a liquid produced by wet dust removal, desulfurization and scrubbing of the flue gas of a fossil-fuel power plant boiler, and a comminuted melting-chamber slag obtained from said boiler, the ratio of sludge to slag being 0.1:1 to 1:0.1;
A method of improving the compressive strength of concrete which consists of recovering a sludge from the wet dust removal and desulfurization and scrubbing of the flue gas of a fossil-fuel power plant boiler, withdrawing melting-chamber slag from said boiler, comminuting said slag, mixing said sludge with said slag in a ratio of sludge to slag of 0.1:1 to 1:0.1 and introducing the mixture into a concrete composition for the production of high-compressive strength concrete bodies, the composition containing about 10% by weight of portland cement.
Dependencies are inferred from the claim text.