# US 12,215,059 B2 · Activation of ground granulated blast furnace slag > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,215,059 B2 - Document ID: US12215059B2 - Status: Granted - Kind: B2 - Application number: 17/281,153 - Filed: 2019-10-01 - Published: 2021-11-04 - Granted: 2025-02-04 - Earliest claimed: 2018-10-02 - Assignees: Sika Technology AG - Applicants: Sika Technology AG - Inventors: Lissa Dupouy; Maxime Liard; Lolita Hauguel; Didier Lootens - Web page: https://patentgrep.com/patent/US12215059B2 ## CPC - C04B 28/08: Slag cements - C04B 7/02: Portland cement - C04B 22/064: {of the alkaline-earth metals} - C04B 22/10: containing carbon in the anion, e.g. carbonates - C04B 22/106: {Bicarbonates} - C04B 22/143: {Calcium-sulfate} - C04B 22/147: {Alkali-metal sulfates; Ammonium sulfate} - C04B 2103/12: Set accelerators - C04B 2103/14: Hardening accelerators - C04B 2103/32: Superplasticisers - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE ## Abstract An improved mineral binder composition including: a mineral binder including at least 30 weight-% slag, based on the weight of the mineral binder, an activator for the hydration of the slag consisting of or comprising calcium hydroxide and a co-activator consisting of or including at least one salt selected from the group consisting of lithium carbonate, lithium sulfate and sodium carbonate. ## Claims ### Claim 1 A mineral binder composition comprising: a mineral binder comprising 36-65 weight-% of slag and 35-64 weight-% of Portland cement, based on the weight of the mineral binder, an activator for the hydration of the slag comprising calcium hydroxide and a co-activator comprising at least one salt selected from the group consisting of lithium carbonate, lithium sulfate and sodium carbonate, wherein the activator is present in an amount in a range of 0.5-3.0 weight-% based on the weight of the mineral binder, wherein the co-activator is present in an amount in a range of 0.16-0.8 weight-% based on the weight of the mineral binder, and wherein a weight-ratio of activator to co-activator is 10:1 to 1.1:1. ### Claim 2 (depends on 1) The mineral binder composition according to claim 1, wherein the slag has a specific surface of 4,400 to 6,000 cm2/g, measured by the Blaine method. ### Claim 3 (depends on 1) The mineral binder composition according to claim 1, wherein the co-activator comprises lithium carbonate and/or sodium carbonate. ### Claim 4 (depends on 1) The mineral binder composition according to claim 1, wherein the co-activator consists of lithium carbonate and/or sodium carbonate. ### Claim 5 (depends on 1) The mineral binder composition according to claim 1, further comprising 0.1 to 5 weight-%, calcium sulfate, based on the weight of the mineral binder without calcium sulfate. ### Claim 6 (depends on 1) The mineral binder composition according to claim 1, further comprising a superplasticizer. ### Claim 7 (depends on 1) The mineral binder composition according to claim 1, wherein the activator is calcium hydroxide the co-activator is lithium carbonate and/or sodium carbonate and the mineral binder composition further comprises, 0 to 4 weight-% of at least one superplasticizer, 0 to 5 weight-% calcium sulfate, 0.006 to 0.5 weight-% of a viscosity-enhancing agent, and 0 to 3 weight-% further additives, wherein all weight-% are based on the weight of the mineral binder. ### Claim 8 (depends on 1) A method for accelerating setting and/or hardening of the mineral binder of claim 1, comprising adding a composition comprising, based on the weight of the composition, 5 to 95 weight-% calcium hydroxide, 5 to 60 weight-% lithium carbonate, lithium sulfate or sodium carbonate, 0 to 40 weight-% calcium sulfate, 0 to 35 weight-% superplasticizer, 0 to 20 weight-% viscosity-enhancing agent, and 0 to 20 weight-% further additives to the mineral binder. ### Claim 9 (depends on 1) A hardened body obtained after hardening of the mineral binder composition according to claim 1 after mixing with water.