CN111439949A - Efficient cement grinding aid and preparation method thereof - Google Patents
Efficient cement grinding aid and preparation method thereof Download PDFInfo
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- CN111439949A CN111439949A CN202010225222.9A CN202010225222A CN111439949A CN 111439949 A CN111439949 A CN 111439949A CN 202010225222 A CN202010225222 A CN 202010225222A CN 111439949 A CN111439949 A CN 111439949A
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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
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/333—Polymers modified by chemical after-treatment with organic compounds containing nitrogen
- C08G65/33303—Polymers modified by chemical after-treatment with organic compounds containing nitrogen containing amino group
- C08G65/33306—Polymers modified by chemical after-treatment with organic compounds containing nitrogen containing amino group acyclic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/333—Polymers modified by chemical after-treatment with organic compounds containing nitrogen
- C08G65/33396—Polymers modified by chemical after-treatment with organic compounds containing nitrogen having oxygen in addition to nitrogen
-
- 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)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a high-efficiency cement grinding aid, which comprises modified polyalcohol amine, molasses, sodium lignosulphonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is set to be 5-15%, the proportion of the cotton fiber is set to be 8-12%, the proportion of the sodium lignosulphonate is set to be 1-3%, the proportion of the industrial salt is set to be 2-13%, and the proportion of the water is set to be 25-70%. The invention is a brand-new product prepared by mixing a polyalcohol amine material and other functional materials, overcomes the defects of low grinding efficiency, poor applicability, high cost and unobvious improvement on the cement strength of the traditional cement grinding aid in terms of molecular structure, and simultaneously, macromolecule polyalcohol amine molecules in the novel polyalcohol amine type high-efficiency cement grinding aid have obvious improvement effect on enhancing the early and later strength of the excited cement, the later strength of the cement is not inverted and shrunk, and the defect that the cement strength can only be improved by increasing the mixing amount of the traditional grinding aid is overcome.
Description
Technical Field
The invention relates to the technical field of cement auxiliary chemical new materials, in particular to a high-efficiency cement grinding aid which respectively improves the 3d strength and the 28d strength of cement ground by adding the cement grinding aid of modified polyalcohol amine by more than 4MPa and 6MPa compared with the blank strength.
Background
The cement production is a high-energy-consumption process, and the grinding power consumption of the cement production process is the most important part of the total power consumption in the cement production process. The grinding aid is added into the grinding machine, so that the grinding state can be obviously improved, the grinding efficiency is improved, the activity of a cement mixed material can be excited, the utilization rate of industrial waste residues is improved, and the using amount of cement clinker is reduced. Therefore, the application of the cement grinding aid has great significance for realizing energy conservation and emission reduction in cement production in China.
Most of the existing cement grinding aids used at home and abroad mainly comprise single products or compound combined products of alcohol amine, polyols, lignin compounds, fatty acids, inorganic salts and the like, and the working principle of the cement grinding aid is that the cement grinding aid can eliminate the phenomena of fine powder adhesion and aggregation in the cement grinding process, accelerate the material grinding process, reduce grinding energy consumption, improve grinding efficiency and improve cement yield. However, the traditional cement grinding aid has the defects of high cost, poor product stability, single function and poor adaptability to cement production process, and is difficult to meet the requirements of 3d and 28d strength of cement in various cement plants at present, particularly high-grade cement, so that an efficient cement grinding aid and a preparation method thereof are provided.
Disclosure of Invention
The invention provides a high-efficiency cement grinding aid and a preparation method thereof, aiming at the defects in the background technology.
The invention adopts the following modified technical scheme that the efficient cement grinding aid comprises modified polyalcohol amine, molasses, sodium lignosulphonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is 5-15%, the proportion of the cotton fiber is 8-12%, the proportion of the sodium lignosulphonate is 1-3%, the proportion of the industrial salt is 2-13%, and the proportion of the water is 25-70%.
In a further preferred embodiment of the present invention, the modified polyalcohol amine ratio is 10%, the cotton fiber ratio is 10%, the sodium lignosulfonate ratio is 1%, the industrial salt ratio is 9%, and the water ratio is 70%.
In a further preferred embodiment of the present invention, the modified polyalcohol amine accounts for 14%, the cotton fiber accounts for 10%, the sodium lignosulfonate accounts for 1%, the industrial salt accounts for 5%, and the water accounts for 70%.
In a further preferred embodiment of the present invention, the production steps include the following:
s1, preprocessing: preparing a clean three-mouth bottle with stirring, cleaning and drying the bottle, and preparing raw materials according to the weight ratio;
s2, pouring the raw material water into a three-mouth bottle, and keeping stirring continuously;
and S3, sequentially adding the modified polyalcohol amine, the molasses, the sodium lignin sulfonate and the industrial salt under stirring, and stirring for 30 minutes to obtain the cement grinding aid.
As a further preferable mode of the present invention, in step S1, the drying is performed by first performing cold air drying, using an air cooler to perform drying, controlling the drying time for 15min, then performing hot air drying, controlling the drying time for 12min, controlling the temperature for hot drying at 65-85 ℃, and finally performing natural cooling.
In a further preferred embodiment of the present invention, in step S3, the rotation speed of stirring is controlled at 245-.
As a further preferable mode of the invention, the preparation of the modified polyalcohol amine comprises the steps of adding 100 parts of deionized water into a three-neck flask with a stirrer and a thermometer, adding 10 parts of PEG, 15 parts of PPG, 15 parts of APEG, 10 parts of diethylenetriamine and 20 parts of triethanolamine under stirring, adding 1 part of hydrogen peroxide at 35 ℃ after the materials are dissolved, dropwise adding 1 part of mercaptopropionic acid and 1 part of aqueous solution within 1 hour, finally dropwise adding 5 parts of silane coupling agent, keeping the temperature at 40 ℃ for 2 hours, and adjusting the pH value to 7-9.5 by using liquid alkali to obtain a modified polyalcohol amine mother solution.
In a further preferred embodiment of the present invention, the percentage concentration of the caustic soda solution is 42 to 76%, and the sodium hydroxide solution, the calcium hypohalide solution and the magnesium carbonate solution are selected and mixed thoroughly in a ratio of 1.4:1.5: 0.8.
In a more preferred embodiment of the present invention, the molecular weight of the PEG is 600, the molecular weight of the PPG is 1000, and the molecular weight of the APEG is 1500.
The invention aims to provide a synthetic modified polyalcohol amine which is polymerized at normal temperature, has high reaction rate, simple process, easy control, low energy consumption, high production efficiency, no pollution in the synthetic process and good product quality, is a high-efficiency cement grinding aid after being mixed with a certain proportion of mixed materials, is not a high-efficiency cement grinding aid realized by simply and physically mixing a plurality of materials, is realized by obtaining a more stable novel high-molecular polyalcohol amine structure, achieves the innovation in principle, is a brand-new product prepared by mixing polyalcohol amine materials and other functional materials, overcomes the defects of low grinding efficiency, poor applicability, high cost and unobvious improvement on cement strength of the traditional cement grinding aid in the aspect of molecular structure, and simultaneously, high-molecular hydramine molecules in the novel high-efficiency cement grinding aid stimulate cement at early and later stages The strength has obvious improvement effect, the later strength of the cement has no phenomenon of reverse shrinkage, and the defect that the strength of the cement can be improved only by increasing the mixing amount of the traditional grinding aid is overcome.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a high-efficiency cement grinding aid comprises modified polyalcohol amine, molasses, sodium lignin sulfonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is set to be 5-15%, the proportion of the cotton fiber is set to be 8-12%, the proportion of the sodium lignin sulfonate is set to be 1-3%, the proportion of the industrial salt is set to be 2-13%, and the proportion of the water is set to be 25-70%.
The modified polyalcohol amine is 10%, the cotton fiber is 10%, the sodium lignosulfonate is 1%, the industrial salt is 9% and the water is 70%.
The modified polyalcohol amine is 14%, the cotton fiber is 10%, the sodium lignosulfonate is 1%, the industrial salt is 5% and the water is 70%.
The manufacturing steps comprise:
s1, preprocessing: preparing a clean three-mouth bottle with stirring, cleaning and drying the bottle, and preparing raw materials according to the weight ratio;
s2, pouring the raw material water into a three-mouth bottle, and keeping stirring continuously;
and S3, sequentially adding the modified polyalcohol amine, the molasses, the sodium lignin sulfonate and the industrial salt under stirring, and stirring for 30 minutes to obtain the cement grinding aid.
In step S1, the drying is carried out by cold air drying, the air cooler is used for drying, the drying time is controlled to be 15min, then the hot air drying is carried out, the drying time is controlled to be 12min, the temperature of the hot drying is controlled to be 65-85 ℃, and finally the natural cooling is carried out.
In step S3, the rotation speed of stirring is controlled at 245-380r/min for 30min, and the temperature is controlled at normal temperature.
The preparation method of the modified polyalcohol amine comprises the steps of adding 100 parts of deionized water into a three-neck flask with a stirrer and a thermometer, adding 10 parts of PEG, 15 parts of PPG, 15 parts of APEG, 10 parts of diethylenetriamine and 20 parts of triethanolamine under stirring, adding 1 part of hydrogen peroxide at 35 ℃ after the materials are dissolved, dropwise adding 1 part of mercaptopropionic acid and 1 part of aqueous solution within 1 hour, finally dropwise adding 5 parts of silane coupling agent, keeping the temperature at 40 ℃ for 2 hours, and adjusting the pH value to 7-9.5 by using liquid alkali to obtain the modified polyalcohol amine mother liquor.
The percentage concentration of the liquid caustic soda is 42-76%, and the liquid caustic soda is prepared by fully mixing sodium hydroxide, calcium hypohalite and magnesium carbonate solution according to the proportion of 1.4:1.5: 0.8.
The molecular weight of the PEG is set to 600, the molecular weight of the PPG is set to 1000, and the molecular weight of the APEG is set to 1500.
Example 1
Cement grinding aid sample 1
The raw materials comprise 55 parts of water, 8 parts of triethanolamine, 15 parts of molasses, 2 parts of sodium lignosulfonate, 5 parts of industrial salt (NaCl), 15 parts of diethanol monoisopropanolamine
In a three-necked flask with stirring, 55 parts of water is added, 8 parts of triethanolamine, 15 parts of molasses, 2 parts of sodium lignosulfonate, 5 parts of industrial salt (NaCl) and 15 parts of diethanol monoisopropanolamine are sequentially added under stirring, and a cement grinding aid sample 1 is obtained after stirring for 30 minutes, wherein test results are shown in Table 1.
Example 2
Cement grinding aid sample 2
The raw materials comprise 50 parts of water, 10 parts of triethanolamine, 15 parts of molasses, 2 parts of sodium lignosulfonate, 10 parts of industrial salt (NaCl) and 13 parts of diethanol monoisopropanolamine.
50 parts of water is firstly added into a three-necked flask with stirring, 10 parts of triethanolamine, 15 parts of molasses, 2 parts of sodium lignosulfonate, 10 parts of industrial salt (NaCl) and 13 parts of diethanol monoisopropanolamine are sequentially added into the three-necked flask with stirring, and the mixture is stirred for 30 minutes to obtain a cement grinding aid sample 2, wherein test results are shown in a table 1.
Example 3
Cement grinding aid sample 3
The raw materials comprise 55 parts of water, 8 parts of triethanolamine, 15 parts of molasses, 2 parts of sodium lignosulfonate, 10 parts of industrial salt (NaCl) and 10 parts of diethanol monoisopropanolamine.
In a three-necked flask with stirring, 55 parts of water is added, 8 parts of triethanolamine, 15 parts of molasses, 2 parts of sodium lignosulfonate, 10 parts of industrial salt (NaCl) and 10 parts of diethanol monoisopropanolamine are sequentially added under stirring, and a cement grinding aid sample 3 is obtained after stirring for 30 minutes, wherein the test results are shown in Table 1.
Example 4
Cement grinding aid sample 4
The raw materials comprise 70 parts of water, 10 parts of modified polyalcohol amine (folded solid), 10 parts of molasses, 1 part of sodium lignosulfonate and 9 parts of industrial salt (NaCl).
70 parts of water is firstly added into a three-necked flask with stirring, 10 parts of modified polyalcohol amine (solid) and 10 parts of molasses are sequentially added under stirring, 1 part of sodium lignin sulfonate and 9 parts of industrial salt (NaCl) are stirred for 30 minutes to obtain a cement grinding aid sample 4, and the test results are shown in Table 1.
Example 5
Cement grinding aid sample 5
The raw materials comprise 70 parts of water, 14 parts of modified polyalcohol amine (folded solid), 10 parts of molasses, 1 part of sodium lignosulfonate and 5 parts of industrial salt (NaCl).
In a three-necked flask with stirring, 70 parts of water is firstly added, 14 parts of modified polyalcohol amine (folded solid), 10 parts of molasses, 1 part of sodium lignosulfonate and 5 parts of industrial salt (NaCl) are sequentially added under stirring, and a cement grinding aid sample 5 is obtained after stirring for 30 minutes, wherein test results are shown in Table 1.
Effects of the implementation
In order to compare the application effect of the prepared cement grinding aid, a test is carried out according to a test method in GB/T26748 cement grinding aid, and the influence of the cement grinding aid on the physical properties of cement is measured under the condition of the same mixing amount (0.1%).
TABLE 1 Effect of different cement grinding aids on the physical Properties of Cement
The test results prove that: the cement grinding aid prepared in the embodiment has the advantages of greatly improved physical properties of cement, good product performance and excellent grinding effect, and can obviously reduce grinding energy consumption, improve grinding efficiency and improve cement yield. Especially, the synthetic modified polyalcohol amine used in the embodiments 4 and 5 can replace the traditional triethanolamine and triisopropanolamine with small molecular weight, the mixing amount is low, the grinding effect is better, the grinding-assisting and strengthening effect on cement is obvious, and the cement grinding aid synthesized by the macromolecular modified polyalcohol amine has low cost, good performance, high comprehensive benefit and wide application prospect.
In conclusion, the invention is realized by obtaining a more stable novel high-molecular polyalcohol amine structure, achieves innovation in principle, is a product prepared by mixing a brand-new polyalcohol amine material with other functional materials, overcomes the defects of low grinding efficiency, poor applicability, high cost and unobvious improvement on cement strength of the traditional cement grinding aid in terms of molecular structure, has an obvious improvement effect on enhancing the strength of the activated cement in early and later periods, has no phenomenon of reverse shrinkage on the strength of the cement in later periods, and overcomes the defect that the strength of the cement can only be improved by increasing the mixing amount of the traditional cement grinding aid.
While there have been shown and described what are at present considered the fundamental principles of the invention and its essential features and advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description of the embodiments is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The efficient cement grinding aid is characterized by comprising modified polyalcohol amine, molasses, sodium lignosulphonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is set to be 5-15%, the proportion of the cotton fiber is set to be 8-12%, the proportion of the sodium lignosulphonate is set to be 1-3%, the proportion of the industrial salt is set to be 2-13%, and the proportion of the water is set to be 25-70%.
2. The high-efficiency cement grinding aid as claimed in claim 1, further comprising the following specific ratio, wherein the ratio of the modified polyalcohol amine is 10%, the ratio of the cotton fiber is 10%, the ratio of the sodium lignosulfonate is 1%, the ratio of the industrial salt is 9%, and the ratio of the water is 70%.
3. The high efficiency cement grinding aid as claimed in claim 1, further comprising a specific ratio of 14% modified polyalcohol amine, 10% cotton fiber, 1% sodium lignosulfonate, 5% industrial salt and 70% water.
4. The method for preparing the high-efficiency cement grinding aid according to any one of claims 1 to 3, characterized in that the preparation steps comprise the following steps:
s1, preprocessing: preparing a clean three-mouth bottle with stirring, cleaning and drying the bottle, and preparing raw materials according to the weight ratio;
s2, pouring the raw material water into a three-mouth bottle, and keeping stirring continuously;
and S3, sequentially adding the modified polyalcohol amine, the molasses, the sodium lignin sulfonate and the industrial salt under stirring, and stirring for 30 minutes to obtain the cement grinding aid.
5. The method for preparing the high-efficiency cement grinding aid according to claim 4, wherein in the step S1, the drying is carried out by firstly carrying out cold air drying, using an air cooler for drying, controlling the drying time for 15min, then carrying out hot air drying, controlling the drying time for 12min, controlling the temperature for hot drying at 65-85 ℃, and finally carrying out natural cooling.
6. The method for preparing the high efficiency cement grinding aid as claimed in claim 4, wherein in step S3, the rotation speed of stirring is controlled at 380r/min 245-380r/min for 30min, and the temperature is controlled at normal temperature.
7. The efficient cement grinding aid as claimed in claim 1, wherein the modified polyalcohol amine is prepared by adding 100 parts of deionized water into a three-necked flask with a stirrer and a thermometer, adding 10 parts of PEG, 15 parts of PPG, 15 parts of APEG, 10 parts of diethylenetriamine and 20 parts of triethanolamine under stirring, adding 1 part of hydrogen peroxide at 35 ℃ after the materials are dissolved, dropwise adding 1 part of mercaptopropionic acid and 1 part of aqueous solution within 1 hour, finally dropwise adding 5 parts of silane coupling agent, keeping the temperature at 40 ℃ for 2 hours, and adjusting the pH value to 7-9.5 with liquid alkali to obtain a modified polyalcohol amine mother liquor.
8. The efficient cement grinding aid as claimed in claim 7, wherein the percentage concentration of the liquid alkali is 42-76%, and the efficient cement grinding aid is prepared by fully mixing sodium hydroxide, calcium hypohalite and magnesium carbonate solutions according to the ratio of 1.4:1.5: 0.8.
9. The high efficiency cement grinding aid as claimed in claim 7, wherein the molecular weight of PEG is set to 600, the molecular weight of PPG is set to 1000, and the molecular weight of APEG is set to 1500.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115028379A (en) * | 2022-05-20 | 2022-09-09 | 湖南中岩建材科技有限公司 | Cement raw material grinding aid and preparation method and application thereof |
| CN115849744A (en) * | 2022-12-07 | 2023-03-28 | 信丰华轩建材有限公司 | Preparation method of high-performance cement grinding aid |
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|---|---|---|---|---|
| US20120318895A1 (en) * | 2007-03-05 | 2012-12-20 | Matthias Buri | Process for dry grinding of one or more mineral materials including at least one calcium carbonate |
| CN103771752A (en) * | 2014-01-02 | 2014-05-07 | 惠州市富力新技术有限公司 | Composite cement grinding aid |
| CN108218286A (en) * | 2018-02-27 | 2018-06-29 | 铜仁学院 | A kind of cement grinding aid and preparation method thereof |
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2020
- 2020-03-26 CN CN202010225222.9A patent/CN111439949A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120318895A1 (en) * | 2007-03-05 | 2012-12-20 | Matthias Buri | Process for dry grinding of one or more mineral materials including at least one calcium carbonate |
| CN103771752A (en) * | 2014-01-02 | 2014-05-07 | 惠州市富力新技术有限公司 | Composite cement grinding aid |
| CN108218286A (en) * | 2018-02-27 | 2018-06-29 | 铜仁学院 | A kind of cement grinding aid and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115028379A (en) * | 2022-05-20 | 2022-09-09 | 湖南中岩建材科技有限公司 | Cement raw material grinding aid and preparation method and application thereof |
| CN115028379B (en) * | 2022-05-20 | 2023-07-07 | 湖南中岩建材科技有限公司 | Cement raw material grinding aid and preparation method and application thereof |
| CN115849744A (en) * | 2022-12-07 | 2023-03-28 | 信丰华轩建材有限公司 | Preparation method of high-performance cement grinding aid |
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Application publication date: 20200724 |