CN111217552A - Cement grinding aid - Google Patents
Cement grinding aid Download PDFInfo
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- CN111217552A CN111217552A CN202010153590.7A CN202010153590A CN111217552A CN 111217552 A CN111217552 A CN 111217552A CN 202010153590 A CN202010153590 A CN 202010153590A CN 111217552 A CN111217552 A CN 111217552A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by heteroatoms or groups containing heteroatoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a cement grinding aid, and belongs to the technical field of cement process additives. The grinding aid disclosed by the invention is composed of the following raw materials in parts by weight: 40-60% of carboxylic acid polymer, 3-6% of polyalcohol, 2-5% of complexing enhancing substance, 2-5% of glycidol trimethyl ammonium chloride, 1-3% of calcium formate, 2-5% of sodium p-aminobenzenesulfonate and the balance of water. The product of the invention has good grinding aid effect, can obviously improve the grinding efficiency of cement, has wide application range, has good adaptability to cement taking fly ash, slag, coal gangue, slag and the like as mixed materials, and is suitable for various portland cement, fly ash cement, slag cement and pozzolana cement.
Description
Technical Field
The invention belongs to the technical field of additives for cement production, and particularly relates to a cement grinding aid.
Background
The cement grinding aid is an additive which is added during cement grinding and has the grinding-aiding effect without damaging the human health and the performance of cement concrete, can obviously improve the grindability of materials, reduce the cohesive and agglomeration effect among particles, improve the flowability of the materials in a grinding mill, further improve the grinding efficiency of the cement grinding mill and reduce the energy consumption. Meanwhile, the clinker consumption can be reduced, the industrial waste residue consumption is increased, and the pollution to the environment caused by clinker production and industrial waste residue stacking is reduced.
The existing commonly used cement grinding aid main raw material alcohol amine (triethanolamine accounts for about 70 percent of the total amount) has unstable effect, is sensitive to the mixing amount, can bring great fluctuation of quality due to fine fluctuation of the mixing amount, has small effect on the later-stage compressive strength of cement, contains only one or two active groups, has single function, and cannot meet the requirements of various cement mixed materials in China.
Disclosure of Invention
Aiming at the problems, the invention provides the cement grinding aid which is suitable for various portland cement, fly ash cement, slag cement and pozzolana cement, uses brand new raw materials and breaks through the limitation that the grinding aid needs to use alcohol amine substances. In order to achieve the purpose, the invention adopts the following technical scheme. The cement grinding aid consists of the following substances in parts by weight: 40-60% of carboxylic acid polymer, 3-6% of polyalcohol, 2-5% of complexing enhancing substance, 2-5% of glycidol trimethyl ammonium chloride, 1-3% of calcium formate, 2-5% of sodium p-aminobenzenesulfonate and the balance of water.
The carboxylic acid polymer is polymerized by diethylene glycol monoacrylate, dimethylaminoethyl methacrylate, sodium p-styrene sulfonate and itaconic acid.
Preferably, the preparation method of the carboxylic acid polymer comprises the following steps:
(1) 160-320 parts by weight of diethylene glycol monoacrylate, 157-314 parts by weight of dimethylaminoethyl methacrylate and 130-260 parts by weight of itaconic acid are respectively added with water to prepare a monomer aqueous solution with the mass fraction of 30% -50%;
(2) adding 6-20 parts by weight of ammonium persulfate into water to prepare an initiator aqueous solution with the mass fraction of 3% -9%;
(3) adding 206-412 parts by weight of sodium p-styrenesulfonate, 206-412 parts by weight of water and 6-15 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 70-90 ℃, then respectively dropwise adding a monomer solution and an initiator solution, carrying out heat preservation reaction for 1-2 h after dropwise adding is finished, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
Preferably, the polyhydric alcohol is one or more of octyldodecanol, mannitol, diglycerol and triglycerol.
Preferably, the complexation-enhancing substance is hydroxyethylidene diphosphonic acid or sodium nitrilotriacetate.
More preferably, the complexing enhancer substance is sodium nitrilotriacetate.
In the invention, the carboxylic acid polymer has excellent grinding aid function, and the carboxylic acid group and the sulfonic acid group contained in the carboxylic acid polymer can generate insoluble crystals with calcium ions, magnesium ions and the like in cement and can also react with Ca (OH) in the hydration process2、Al(OH)3Insoluble acicular ettringite crystals are generated and filled in pores and gaps of the set cement to increase the compactness of the set cement, thereby effectively increasing the strength of the set cement; hydroxyl in the polyhydric alcohol used in the invention has stronger polarity, can be adsorbed on the surface of cement fine particles, reduces surface energy or neutralizes electric charge, avoids agglomeration and combination of the fine particles, and effectively improves the grinding efficiency of cement; the complex reinforcing substance can form a soluble complex with calcium ions in cement, the complex can migrate to communicated pores, microcracks and cracks along with water and then react with unhydrated cement particles or carbon dioxide in air to generate substances such as hydrated calcium silicate or calcium carbonate and the like, the microcracks and the cracks are filled, defects of the cement stone are reduced, and the strength of the cement stone is improved; surprisingly, the inventor finds that the glycidol trimethyl ammonium chloride has good grinding-aid function when being applied to the cement grinding process due to the fact that the glycidol trimethyl ammonium chloride contains epoxy groups and chlorine atoms, and can improve the strength of cement; the calcium formate has good effect of improving the early strength of the cement, but the inventor finds that the calcium formate is not good in solubility in a system and easy to generate precipitates when being used alone, the calcium formate is well dissolved in the system and no precipitates are generated when the sodium sulfanilate is mixed with the calcium formate, the sodium sulfanilate can promote the calcium formate to be rapidly dispersed and dissolved in the system, and in addition, the sodium sulfanilate also has good permeability and can carry other components to permeate into the surface layer of cement particles to play a role more quickly.
Has the advantages that:
(1) the product of the invention has good grinding-aiding effect, can obviously improve the grinding efficiency of cement, and the large grinding experiment result shows that the yield-increasing amplitude can reach 8-15% after the grinding aid is used;
(2) the grinding aid has the advantages that different molecular functional groups of the components complement and cooperate with each other, the application range is wide, the grinding aid has good adaptability to cement taking fly ash, slag, coal gangue, slag and the like as mixed materials, and the grinding aid is suitable for various portland cement, fly ash cement, slag cement and pozzolana cement.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments, but is not limited thereto.
Example 1
The cement grinding aid consists of the following substances in parts by weight: 40% of carboxylic acid polymer, 6% of polyhydric alcohol, 2% of complexing reinforcing substance, 5% of glycidol trimethyl ammonium chloride, 1% of calcium formate, 2% of sodium p-aminobenzenesulfonate and the balance of water.
The carboxylic acid polymer is polymerized by diethylene glycol monoacrylate, dimethylaminoethyl methacrylate, sodium p-styrene sulfonate and itaconic acid.
The polyol is octyldodecanol.
The complexation-enhancing substance is 2-hydroxyphosphonoacetic acid.
Example 2
The cement grinding aid consists of the following substances in parts by weight: 60% of carboxylic acid polymer, 3% of polyhydric alcohol, 5% of complexing reinforcing substance, 2% of glycidol trimethyl ammonium chloride, 3% of calcium formate, 5% of sodium p-aminobenzenesulfonate and the balance of water.
The preparation method of the carboxylic acid polymer comprises the following steps:
(1) respectively adding 160 parts by weight of diethylene glycol monoacrylate, 314 parts by weight of dimethylaminoethyl methacrylate and 130 parts by weight of itaconic acid into water to prepare a monomer aqueous solution with the mass fraction of 50%;
(2) adding 6 parts by weight of ammonium persulfate into water to prepare an initiator aqueous solution with the mass fraction of 9%;
(3) adding 206 parts by weight of sodium p-styrenesulfonate, 412 parts by weight of water and 6 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 90 ℃, then respectively dropwise adding a monomer solution and an initiator solution, carrying out heat preservation reaction for 1 h after dropwise adding is finished, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
The complexing enhancer is hydroxyethylidene diphosphonic acid.
Example 3
The cement grinding aid consists of the following substances in parts by weight: 50% of carboxylic acid polymer, 4% of polyhydric alcohol, 4% of complexing reinforcing substance, 3% of glycidol trimethyl ammonium chloride, 2% of calcium formate, 4% of sodium p-aminobenzenesulfonate and the balance of water.
The preparation method of the carboxylic acid polymer comprises the following steps:
(1) respectively adding 320 parts by weight of diethylene glycol monoacrylate, 157 parts by weight of dimethylaminoethyl methacrylate and 260 parts by weight of itaconic acid into water to prepare a monomer aqueous solution with the mass fraction of 30%;
(2) adding water into 20 parts by weight of ammonium persulfate to prepare an initiator aqueous solution with the mass fraction of 3%;
(3) adding 412 parts by weight of sodium p-styrenesulfonate, 206 parts by weight of water and 15 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 70 ℃, then respectively dropwise adding a monomer solution and an initiator solution, carrying out heat preservation reaction for 2 hours after dropwise adding is finished, and cooling to room temperature for discharging to obtain the carboxylic acid polymer.
The polyhydric alcohol is mannitol.
The complexing reinforcing substance is sodium nitrilotriacetic acid.
Example 4
The cement grinding aid consists of the following substances in parts by weight: 45% of carboxylic acid polymer, 5% of polyhydric alcohol, 3% of complexing reinforcing substance, 4% of glycidol trimethyl ammonium chloride, 2.5% of calcium formate, 3% of sodium p-aminobenzenesulfonate and the balance of water.
The preparation method of the carboxylic acid polymer comprises the following steps:
(1) adding 230 parts by weight of diethylene glycol monoacrylate, 200 parts by weight of dimethylaminoethyl methacrylate and 212 parts by weight of itaconic acid into water respectively to prepare a monomer aqueous solution with the mass fraction of 38%;
(2) adding 16 parts by weight of ammonium persulfate into water to prepare an initiator aqueous solution with the mass fraction of 5%;
(3) adding 280 parts by weight of sodium p-styrenesulfonate, 320 parts by weight of water and 11 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 80 ℃, then respectively dropwise adding a monomer solution and an initiator solution, keeping the temperature after dropwise adding, reacting for 1.5 h, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
The polyol consists of diglycerol and triglycerol in a weight ratio of 1: 1.
The complexing reinforcing substance is sodium nitrilotriacetic acid.
Example 5
The cement grinding aid consists of the following substances in parts by weight: 52% of carboxylic acid polymer, 4.5% of polyhydric alcohol, 3.5% of complexing enhancing substance, 4.2% of glycidol trimethyl ammonium chloride, 1.5% of calcium formate, 3.8% of sodium sulfanilate and the balance of water.
The preparation method of the carboxylic acid polymer comprises the following steps:
(1) respectively adding water into 250 parts by weight of diethylene glycol monoacrylate, 230 parts by weight of dimethylaminoethyl methacrylate and 182 parts by weight of itaconic acid to prepare a monomer aqueous solution with the mass fraction of 450%;
(2) adding water into 9 parts by weight of ammonium persulfate to prepare an initiator aqueous solution with the mass fraction of 4%;
(3) adding 235 parts by weight of sodium p-styrenesulfonate, 400 parts by weight of water and 8 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 85 ℃, then respectively dropwise adding a monomer solution and an initiator solution, carrying out heat preservation reaction for 1.2 h after dropwise adding is finished, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
The polyol is triglycerol.
The complexing reinforcing substance is sodium nitrilotriacetic acid.
Example 6
The cement grinding aid consists of the following substances in parts by weight: 52% of carboxylic acid polymer, 4% of polyhydric alcohol, 4% of complexing reinforcing substance, 2.5% of glycidol trimethyl ammonium chloride, 3% of sodium sulfanilate and the balance of water.
Comparative example 1
The cement grinding aid consists of the following substances in parts by weight: 5% of polyalcohol, 3% of complexing enhancing substance, 4% of glycidol trimethyl ammonium chloride, 2.5% of calcium formate, 3% of sodium p-aminobenzenesulfonate and the balance of water.
The polyol consists of diglycerol and triglycerol in a weight ratio of 1: 1.
The complexing reinforcing substance is sodium nitrilotriacetic acid.
Comparative example 2
The cement grinding aid consists of the following substances in parts by weight: 52% of carboxylic acid polymer, 4.5% of polyalcohol, 3.5% of complexing enhancing substance, 1.5% of calcium formate, 3.8% of sodium p-aminobenzenesulfonate and the balance of water.
The preparation method of the carboxylic acid polymer comprises the following steps:
(1) respectively adding water into 250 parts by weight of diethylene glycol monoacrylate, 230 parts by weight of dimethylaminoethyl methacrylate and 182 parts by weight of itaconic acid to prepare a monomer aqueous solution with the mass fraction of 450%;
(2) adding water into 9 parts by weight of ammonium persulfate to prepare an initiator aqueous solution with the mass fraction of 4%;
(3) adding 235 parts by weight of sodium p-styrenesulfonate, 400 parts by weight of water and 8 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 85 ℃, then respectively dropwise adding a monomer solution and an initiator solution, carrying out heat preservation reaction for 1.2 h after dropwise adding is finished, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
The polyol is triglycerol.
The complexing reinforcing substance is sodium nitrilotriacetic acid.
Comparative example 3
The cement grinding aid consists of the following substances in parts by weight: 45% of carboxylic acid polymer, 5% of polyhydric alcohol, 3% of complexing reinforcing substance, 4% of glycidol trimethyl ammonium chloride, 2.5% of calcium formate and the balance of water.
The preparation method of the carboxylic acid polymer comprises the following steps:
(1) adding 230 parts by weight of diethylene glycol monoacrylate, 200 parts by weight of dimethylaminoethyl methacrylate and 212 parts by weight of itaconic acid into water respectively to prepare a monomer aqueous solution with the mass fraction of 38%;
(2) adding 16 parts by weight of ammonium persulfate into water to prepare an initiator aqueous solution with the mass fraction of 5%;
(3) adding 280 parts by weight of sodium p-styrenesulfonate, 320 parts by weight of water and 11 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 80 ℃, then respectively dropwise adding a monomer solution and an initiator solution, keeping the temperature after dropwise adding, reacting for 1.5 h, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
The polyol consists of diglycerol and triglycerol in a weight ratio of 1: 1.
The complexing reinforcing substance is sodium nitrilotriacetic acid.
Comparative example 4
The cement grinding aid consists of the following substances in parts by weight: 52% of carboxylic acid polymer, 4.5% of polyalcohol, 4.2% of glycidol trimethyl ammonium chloride, 1.5% of calcium formate, 3.8% of sodium p-aminobenzenesulfonate and the balance of water.
The preparation method of the carboxylic acid polymer comprises the following steps:
(1) respectively adding water into 250 parts by weight of diethylene glycol monoacrylate, 230 parts by weight of dimethylaminoethyl methacrylate and 182 parts by weight of itaconic acid to prepare a monomer aqueous solution with the mass fraction of 450%;
(2) adding water into 9 parts by weight of ammonium persulfate to prepare an initiator aqueous solution with the mass fraction of 4%;
(3) adding 235 parts by weight of sodium p-styrenesulfonate, 400 parts by weight of water and 8 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 85 ℃, then respectively dropwise adding a monomer solution and an initiator solution, carrying out heat preservation reaction for 1.2 h after dropwise adding is finished, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
The polyol is triglycerol.
Performance testing
The cement raw material mixing ratio is as follows: 65 wt% of clinker, 5 wt% of gypsum, 20 wt% of slag and 10 wt% of fly ash, mixing the grinding aid obtained in the examples 1-6 and the comparative examples 1-4 with the materials uniformly according to the mixing amount of 0.03%, and grinding for 24 min in a standard test mill with phi 500 mm of SM-500 produced by tin-free instrument and machinery Limited company to obtain the cement. The data of the sifting, the setting time, the strength and the like are tested, and the test results are shown in the following table 1.
Table 1 results of performance testing
As can be seen from the data in the table, compared with the blank cement without the grinding aid, the cement using the grinding aid of the embodiment of the invention has the advantages that the oversize residue of 45um is reduced, the fineness is thinned, and the flexural strength and the compressive strength are obviously improved. Different molecular functional groups in each component in the formula of the grinding aid provided by the invention play a role in mutual coordination and synergistic interaction, are the key points of good grinding aid and enhancement effect of the grinding aid provided by the invention, and have weak effect in the absence of the other components. The grinding aid has small mixing amount and obvious effect, has good adaptability to different types of cement, and is suitable for popularization and use.
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (4)
1. The cement grinding aid is characterized by comprising the following components in parts by weight: 40-60% of carboxylic acid polymer, 3-6% of polyhydric alcohol, 2-5% of complexing enhancing substance, 2-5% of glycidol trimethyl ammonium chloride, 1-3% of calcium formate, 2-5% of sodium p-aminobenzenesulfonate and the balance of water; the carboxylic acid polymer is polymerized by diethylene glycol monoacrylate, dimethylaminoethyl methacrylate, sodium p-styrene sulfonate and itaconic acid; the complexing reinforcing substance is hydroxyethylidene diphosphonic acid or sodium nitrilotriacetate.
2. The cement grinding aid as claimed in claim 1, wherein the preparation method of the carboxylic acid polymer comprises the following steps:
(1) 160-320 parts by weight of diethylene glycol monoacrylate, 157-314 parts by weight of dimethylaminoethyl methacrylate and 130-260 parts by weight of itaconic acid are respectively added with water to prepare a monomer aqueous solution with the mass fraction of 30% -50%;
(2) adding 6-20 parts by weight of ammonium persulfate into water to prepare an initiator aqueous solution with the mass fraction of 3% -9%;
(3) adding 206-412 parts by weight of sodium p-styrenesulfonate, 206-412 parts by weight of water and 6-15 parts by weight of chain transfer agent into a four-neck flask provided with a stirrer and a reflux condenser, heating to 70-90 ℃, then respectively dropwise adding a monomer solution and an initiator solution, carrying out heat preservation reaction for 1-2 h after dropwise adding is finished, cooling to room temperature, and discharging to obtain the carboxylic acid polymer.
3. The cement grinding aid of claim 1, wherein the polyol is one or more of octyldodecanol, mannitol, diglycerol, and triglycerol.
4. The cement grinding aid of claim 1 wherein the complexing enhancing substance is 2-hydroxyphosphonoacetic acid.
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| CN202010153590.7A CN111217552A (en) | 2020-03-06 | 2020-03-06 | Cement grinding aid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448625A (en) * | 2022-08-30 | 2022-12-09 | 华新水泥股份有限公司 | Grinding aid for improving performance of high-alkali cement and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448625A (en) * | 2022-08-30 | 2022-12-09 | 华新水泥股份有限公司 | Grinding aid for improving performance of high-alkali cement and preparation method thereof |
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