# US 12,759,939 B2 · Hydraulic binder for mortar composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,939 B2 - Document ID: US12759939B2 - Status: Granted - Kind: B2 - Application number: 18/553,815 - Filed: 2022-04-04 - Published: 2024-06-13 - Granted: 2026-10-13 - Earliest claimed: 2021-04-09 - Assignees: Saint-Gobain Weber France - Applicants: Saint-Gobain Weber France - Inventors: Gunnar Lauren; Yannick Sallier - Web page: https://patentgrep.com/patent/US12759939B2 ## CPC - C04B 28/16: containing anhydrite {, e.g. Keene's cement} - C04B 2111/00482: {Coating or impregnation materials} - C04B 2111/60: Flooring materials - 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 A hydraulic binder for a mortar composition includes at least one ladle slag having a particle size distribution by volume such that the D50 is less than 40 μm. ## Claims ### Claim 1 A hydraulic binder for a mortar composition comprising, by weight, from 10 to 70% of at least one ladle slag, from 0 to 35% of Portland cement, from 5 to 45% of calcium sulfate and from 2 to 35% of aluminous cement, the at least one ladle slag having a particle size distribution by volume such that the D50 is less than 40 μm, wherein the ladle slag has a chemical composition which comprises the following constituents within the limits hereunder expressed as percentages by weight: SiO2: 2-20%, CaO: 30-60% Al2O3: 20-50%, and wherein the ladle slag comprises at least one crystalline phase of calcium aluminate type in a content by weight of between 10 and 60%. ### Claim 2 (depends on 1) The binder according to claim 1, wherein the at least one crystalline phase of the calcium aluminate type is of C3A or C12A7 type. ### Claim 3 (depends on 2) The binder according to claim 2, wherein the D50 of the ladle slag is less than 20 μm. ### Claim 4 (depends on 1) The binder according to claim 1, comprising said ladle slag and at least one of the following constituents: one or more cements selected from Portland cements, belite cements, aluminous or sulfoaluminate cements, cements of pozzolanic mixtures optionally comprising fly ash, silica fumes, limestone, calcined schist and/or natural or calcined pozzolans, and/or a source of calcium sulfate selected from plaster, hemihydrate, gypsum and/or anhydrite, alone or in a mixture. ### Claim 5 (depends on 1) The binder according to claim 1, which comprises or consists of, by weight, from 10 to 70% of ladle slag, from 2 to 35% of Portland cement, from 5 to 45% of calcium sulfate and from 2 to 35% of aluminous cement. ### Claim 6 (depends on 1) A dry mortar composition comprising a binder according to claim 1, and aggregates. ### Claim 7 (depends on 6) The dry mortar composition according to claim 6, wherein the aggregates have a diameter of less than 8 mm. ### Claim 8 (depends on 6) The dry mortar composition according to claim 6, comprising by weight from 0 to 7% of Portland cement, from 1 to 35% of ladle slag, from 1 to 15% of calcium sulfate, from 0 to 5% of aluminous cement and from 40 to 90% of aggregates. ### Claim 9 (depends on 8) The dry mortar composition according to claim 8, comprising by weight from 3 to 6% of Portland cement, from 8 to 15% of ladle slag, from 5 to 10% of calcium sulfate, from 1 to 4% of aluminous cement and from 40 to 90% of aggregates. ### Claim 10 (depends on 6) The dry mortar composition according to claim 6, comprising one or more additives, chosen from rheological agents, water-retaining agents, air-entraining agents, thickeners, biocidal protecting agents, dispersants, pigments, accelerators and/or retarders, polymeric resins. ### Claim 11 (depends on 6) A floor product or technical mortar, capable of being obtained by mixing with water of the dry mortar composition according to claim 6. ### Claim 12 (depends on 11) The floor product according to claim 11, which is a screed or a floor coating. ### Claim 13 (depends on 1) The binder according to claim 1, wherein the ladle slag has a chemical composition which comprises the following constituents within the limits hereunder expressed as percentages by weight: SiO2: 7-12%, CaO: 40-55% Al2O3: 25-45%. ### Claim 14 (depends on 3) The binder according to claim 3, wherein the D50 of the ladle slag is between 8 and 15 μm. ### Claim 15 (depends on 6) The dry mortar composition according to claim 6, comprising between 10 and 60% by weight of binder. ### Claim 16 (depends on 7) The dry mortar composition according to claim 7, wherein the aggregates have a diameter of less than 4 mm. ### Claim 17 (depends on 11) The floor product according to claim 11, wherein the floor product is floor product a coating or screed. ### Claim 18 (depends on 1) The binder according to claim 1, wherein the ladle slag is crystallized at least 30% by weight. ### Claim 19 (depends on 1) The binder according to claim 1, wherein the ladle slag has an iron oxide content of less than 5% by weight. ### Claim 20 (depends on 1) The binder according to claim 1, wherein the ladle slag comprises a phase C3A and a phase C12A7 in a total content by weight of at least 20%.