# US 11,111,178 B2 · Renewable admixtures for cementitious compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,111,178 B2 - Document ID: US11111178B2 - Status: Granted - Kind: B2 - Application number: 16/388,000 - Filed: 2019-04-18 - Published: 2019-12-19 - Granted: 2021-09-07 - Earliest claimed: 2018-06-18 - Assignees: The Board of Trustees of The University of Alabama - Applicants: The Board of Trustees of the University of Alabama - Inventors: Jialai Wang - Web page: https://patentgrep.com/patent/US11111178B2 ## CPC - C04B 24/06: containing hydroxy groups - C04B 28/02: containing hydraulic cements other than calcium sulfates - C04B 14/005: {Inorganic fillers with a shape other than granular or fibrous (carbon nanotubes C04B14/026)} - C04B 24/02: Alcohols; Phenols; Ethers - C04B 28/04: Portland cements - C04B 28/188: {the Ca-silicates being present in the starting mixture} - C04B 28/24: containing alkyl, ammonium or metal silicates; containing silica sols {(reaction mixtures resulting in mineral polymers C04B28/006; polymeric reaction products of alkali metal silicates with isocyanates C08G18/3895)} - C04B 28/26: Silicates of the alkali metals - C04B 40/0046: {characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures} - C04B 2103/22: Set retarders - C04B 2111/26: Corrosion of reinforcement resistance - 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 Cementitious compositions comprising a hydraulic cementitious material, a compound selected from the group consisting of a polyhydroxy aromatic compound, a polycarboxylic acid-containing compound or a salt thereof, ascorbic acid or a salt thereof, or a combination thereof, and a particulate material or a water soluble silicate-containing material that interacts with the compound are described herein. The polyhydroxy aromatic compound can be a water soluble compound having from two to thirty hydroxyl groups. The particulate material can exhibit a particle size distribution, wherein at least about 90% by weight of the particles have a diameter of less than 2 mm. Suitable particulate materials include nanoparticles and microparticles. The cementitious compositions can be used to form building materials. The cementitious compositions are especially suited for inhibiting corrosion of reinforcing steel bars embedded in concrete mixtures. Methods of making and using the cementitious composition are also disclosed. ## Claims ### Claim 1 A composition, comprising: a hydraulic cementitious material; a hydroxyl containing compound selected from the group consisting of water soluble polyhydroxy aromatic compounds, wherein the hydroxyl containing compound is present in an amount of from 0.1% to 3% by weight, based on the total weight of the cementitious material, and a particulate material and optionally a water soluble silicate-containing material that interacts with the hydroxyl containing compound, wherein the particulate material comprises nanoparticles present in an amount of from 0.2% to 5% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound. ### Claim 2 (depends on 1) The composition of claim 1, wherein the hydraulic cementitious material is selected from the group consisting of ordinary Portland cement, calcium aluminate cement, calcium phosphate cement, calcium sulfate hydrate, calcium aluminate sulfonate cement, magnesium oxychloride cement, magnesium oxysulfate cement, magnesium phosphate cement, and combinations thereof. ### Claim 3 (depends on 1) The composition of claim 1, wherein the water soluble polyhydroxy aromatic compound has a molecular weight of from 50 to 9000 g/mol. ### Claim 4 (depends on 1) The composition of claim 1, wherein the water soluble polyhydroxy aromatic compound is a polyphenol, a polyhydroxy phenol, or a combination thereof. ### Claim 5 (depends on 1) The composition of claim 1, wherein the water soluble polyhydroxy aromatic compound comprises a tannin, a proanthocyanidin, a catechol, a gallic acid, or a combination thereof. ### Claim 6 (depends on 1) The composition of claim 1, wherein the water soluble polyhydroxy aromatic compound is present in an amount of from 0.1% to 1.5% by weight, based on the total weight of the cementitious material. ### Claim 7 (depends on 1) The composition of claim 1, wherein at least about 90% by weight of particles in the particulate material have a diameter of less than 2 mm. ### Claim 8 (depends on 1) The composition of claim 1, wherein the particulate material further comprises microparticles. ### Claim 9 (depends on 1) The composition of claim 1, wherein the particulate material comprises silica, clay, fibers, calcium silicate hydrate, calcium aluminate, magnesium oxide, lime, wollastonite, a water soluble silicate salt, or mixtures thereof. ### Claim 10 (depends on 1) The composition of claim 1, wherein the particulate material further comprises microparticles present in an amount of from 5% to 30% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound. ### Claim 11 (depends on 1) The composition of claim 1, comprising the water soluble silicate-containing material, present in an amount of from 0.1% to 5% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound. ### Claim 12 (depends on 1) The composition of claim 1, wherein at least a portion of the hydroxyl containing compound reacts with a surface of the particulate material or the water soluble silicate-containing material through covalent and/or noncovalent interactions. ### Claim 13 (depends on 1) The composition of claim 1, further comprising an aggregate. ### Claim 14 (depends on 1) A building material selected from concrete, a tile, a brick, a paver, a panel, or a synthetic stone comprising the cementitious composition of claim 1. ### Claim 15 (depends on 1) A method of making a cementitious composition according to claim 1, the method comprising: mixing a hydroxyl containing compound and a particulate material that interacts with the hydroxyl containing compound to form a slurry having a pH value higher than 4, and blending the slurry with a hydraulic cementitious material to produce a cementitious mixture, wherein the hydroxyl containing compound is selected from the group consisting of water soluble polyhydroxy aromatic compounds, wherein the hydroxyl containing compound is present in an amount of from 0.1% to 3% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound, and wherein the particulate material comprises nanoparticles present in an amount of from 0.2% to 5% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound. ### Claim 16 (depends on 15) The method of making a cementitious composition according to claim 15, the method further comprising: mixing the hydroxyl containing compound with a water soluble silicate salt or Portland cement particles. ### Claim 17 (depends on 16) The method of claim 16, further comprising reacting the water soluble silicate salt with an aqueous solution of a calcium salt. ### Claim 18 (depends on 1) A method of making a cementitious composition according to claim 1, the method comprising: mixing a hydroxyl containing compound, a particulate material, optionally a water soluble silicate-containing material that interacts with the hydroxyl containing compound, and a hydraulic cementitious material to produce a cementitious mixture, wherein the hydroxyl containing compound is selected from the group consisting of water soluble polyhydroxy aromatic compounds, wherein the hydroxyl containing compound is present in an amount of from 0.1% to 3% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound, and wherein the particulate material comprises nanoparticles present in an amount of from 0.2% to 5% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound. ### Claim 19 (depends on 18) The method of claim 18, further comprising hydrating the cementitious mixture. ### Claim 20 (depends on 18) The method of claim 18, wherein the cementitious composition after curing for 3 days, develops a compressive strength that is the same or at least about 0.1 MPa greater than the compressive strength of an identical composition not including the hydroxyl containing compound and the particulate material or the water soluble silicate-containing material. ### Claim 21 (depends on 18) The method of claim 18, wherein the cementitious composition after curing for 28 days, develops a compressive strength of at least about 20% or greater or at least about 10 MPa greater than the compressive strength of an identical composition not including the hydroxyl containing compound and the particulate material or the water soluble silicate-containing material. ### Claim 22 A method for improving corrosion resistance of reinforcing steel bars embedded in concrete, comprising: embedding the reinforcing steel bars in a cementitious composition, wherein the cementitious composition comprises: a hydraulic cementitious material; hydroxyl containing compound selected from the group consisting of a polyhydroxy aromatic compound, a polycarboxylic acid-containing compound or a salt thereof, ascorbic acid or a salt thereof, and a combination thereof, wherein the hydroxyl containing compound is present in an amount of from 0.1% to 3% by weight, based on the total weight of the cementitious material, and a particulate material and/or a water soluble silicate-containing material that interacts with the hydroxyl containing compound. ### Claim 23 (depends on 22) The method of claim 22, wherein the particulate material comprises nanoparticles present in an amount of from 0.2% to 5% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound. ### Claim 24 A composition, comprising: a hydraulic cementitious material; a hydroxyl containing compound selected from the group consisting of polyhydroxy aromatic compounds, wherein the polyhydroxy aromatic compound is present in an amount of from 0.1% to 1.5% by weight, based on the total weight of the cementitious material, and a particulate material and optionally a water soluble silicate-containing material that interacts with the hydroxyl containing compound, wherein the particulate material comprises nanoparticles present in an amount of from 0.2% to 5% by weight, based on the total weight of the cementitious material and the hydroxyl containing compound.