# US 2026/0217602 A1 · Mechanochemical synthesis of hydraulically reactive cements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0217602 A1 - Document ID: US20260217602A1 - Status: Published application - Kind: A1 - Application number: 19/402,455 - Filed: 2025-11-26 - Published: 2026-07-30 - Earliest claimed: 2024-11-27 - Assignees: Georgia Tech Research Corporation - Applicants: Georgia Tech Research Corporation - Inventors: Carsten Sievers; Kimberly Kurtis; Van Son Nguyen; Elsa Qoku - Web page: https://patentgrep.com/patent/US20260217602A1 ## CPC - C04B 7/34: Hydraulic lime cements; Roman cements {; natural cements} - C04B 7/3453: {Belite cements, e.g. self-disintegrating cements based on dicalciumsilicate} - C04B 7/44: Burning; Melting - C04B 22/00863: {Calcium silicate hydrate} - C04B 28/18: containing mixtures of the silica-lime type - 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 The present disclosure provides a method of making hydraulic cement, comprising providing a vessel having a chamber, placing a first reagent comprising calcium oxide and a second reagent comprising silicon dioxide in the chamber, and mechanochemically reacting the first and second reagents by simultaneously applying mechanical grinding forces and heating the chamber above room temperature to form a reaction product comprising nanocrystalline calcium silicate phases. The method enables formation of hydraulically reactive calcium silicate minerals through thermal-assisted mechanical grinding at lower temperatures than conventional cement kiln processes. The chamber contains grinding elements that apply mechanical impact forces while the vessel is heated to temperatures ranging from 100°C to 800°C. The reaction product comprises Ca-O-Si bonds and silicate phases including tricalcium silicate and dicalcium silicate. The combined treatment produces calcium silicate phases in amounts of at least 70% of the total reaction product. ## Claims ### Claim 1 A method of making hydraulic cement, comprising: providing a vessel having a chamber; placing a first reagent comprising calcium oxide and a second reagent comprising silicon dioxide in the chamber; and mechanochemically reacting the first and second reagents by simultaneously applying mechanical grinding forces and heating the chamber to a temperature above room temperature to form a reaction product comprising nanocrystalline calcium silicate phases. ### Claim 2 (depends on 1) The method of claim 1, wherein the first and second reagents are present in the chamber at a stoichiometric ratio of calcium to silicon of about 1:1 to about 5:1. ### Claim 3 (depends on 1) The method of claim 1, wherein the chamber contains one or more grinding elements. ### Claim 4 (depends on 3) The method of claim 3, wherein the grinding elements comprise grinding balls. ### Claim 5 (depends on 4) The method of claim 4, wherein applying the mechanical grinding forces comprises operating the vessel to generate impact velocities of 1-20 m/s. ### Claim 6 (depends on 1) The method of claim 1, wherein mechanochemically reacting the first and second reagents comprises heating the chamber to a temperature of 100°C to 1000°C. ### Claim 7 (depends on 1) The method of claim 1, wherein the vessel further comprises a thermal controller configured to regulate an internal temperature of the chamber during reacting. ### Claim 8 (depends on 1) The method of claim 1, wherein the reaction product comprises Ca-O-Si and/or Ca-O-Al bonds. ### Claim 9 (depends on 1) The method of claim 1, wherein the reaction product comprises multiple silicate phases present in an amount of at least 70% of the reaction product. ### Claim 10 (depends on 9) The method of claim 9, wherein the silicate phases are present in an amount of at least 90% of the reaction product. ### Claim 11 A method of synthesizing hydraulically reactive calcium silicate minerals, comprising: loading calcium oxide and silicon dioxide into a milling vessel containing grinding elements; sealing the milling vessel; applying mechanical impact forces with the grinding elements to the calcium oxide and silicon dioxide; simultaneously heating the milling vessel to an elevated temperature above room temperature during the mechanical impact; and forming calcium silicate phases having Ca-O-Si and/or Ca-O-Al bonds through the combined application of mechanical impact forces and heating. ### Claim 12 (depends on 11) The method of claim 11, wherein the calcium oxide and silicon dioxide are present at a stoichiometric ratio of calcium to silicon of 1:1 to 5:1. ### Claim 13 (depends on 12) The method of claim 12, wherein the stoichiometric ratio of calcium to silicon is about 3:1. ### Claim 14 (depends on 11) The method of claim 11, wherein applying mechanical impact forces with the grinding elements to the calcium oxide and silicon dioxide comprises operating the milling vessel to generate impact velocities of 1-20 m/s. ### Claim 15 (depends on 11) The method of claim 11, wherein the mechanical impact forces are applied for a duration of 5 minutes to 2 days. ### Claim 16 (depends on 11) The method of claim 11, wherein the milling vessel is heated to an elevated temperature of 100°C to 1000°C. ### Claim 17 (depends on 11) The method of claim 11, wherein the milling vessel further comprises a thermal controller configured to regulate the elevated temperature during the mechanical impact. ### Claim 18 (depends on 11) The method of claim 11, wherein the calcium silicate phases comprise tricalcium silicate, dicalcium silicate, or combinations thereof. ### Claim 19 (depends on 11) The method of claim 11, wherein the calcium silicate phases are present in an amount of at least 70% of a total reaction product formed by the combined mechanical and thermal treatment. ### Claim 20 (depends on 19) The method of claim 19, wherein the calcium silicate phases are present in an amount of at least 90% of the total reaction product.