CN115893907A - Composite cement grinding aid and preparation method thereof - Google Patents
Composite cement grinding aid and preparation method thereof Download PDFInfo
- Publication number
- CN115893907A CN115893907A CN202211737777.7A CN202211737777A CN115893907A CN 115893907 A CN115893907 A CN 115893907A CN 202211737777 A CN202211737777 A CN 202211737777A CN 115893907 A CN115893907 A CN 115893907A
- Authority
- CN
- China
- Prior art keywords
- grinding aid
- cement
- cement grinding
- composite cement
- retarder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004568 cement Substances 0.000 title claims abstract description 99
- 238000000227 grinding Methods 0.000 title claims abstract description 96
- 239000002131 composite material Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229920005862 polyol Polymers 0.000 claims abstract description 32
- 150000003077 polyols Chemical class 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims abstract description 23
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims description 27
- 235000021552 granulated sugar Nutrition 0.000 claims description 11
- CDOUZKKFHVEKRI-UHFFFAOYSA-N 3-bromo-n-[(prop-2-enoylamino)methyl]propanamide Chemical compound BrCCC(=O)NCNC(=O)C=C CDOUZKKFHVEKRI-UHFFFAOYSA-N 0.000 claims description 10
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 claims description 7
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- AGNTUZCMJBTHOG-UHFFFAOYSA-N 3-[3-(2,3-dihydroxypropoxy)-2-hydroxypropoxy]propane-1,2-diol Chemical compound OCC(O)COCC(O)COCC(O)CO AGNTUZCMJBTHOG-UHFFFAOYSA-N 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Disintegrating Or Milling (AREA)
Abstract
The invention provides a composite cement grinding aid, which comprises the following raw materials in percentage by mass: 5-8% of diethanol monoisopropanolamine, 10-15% of polymeric polyol, 4-8% of sodium thiocyanate, 2-4% of glycerol, 1-3% of retarder and the balance of water; the composite cement grinding aid belongs to a high-strength, enhanced and low-consumption cement grinding aid; the grinding efficiency of a cement grinding machine can be remarkably improved by 17-21%; can obviously improve the 3-day strength of the cement by 3-4MPa and increase the 28-day strength of the cement by 6-8MPa, and has wide application value in the field of cement production.
Description
Technical Field
The invention belongs to the technical field of cement production, and particularly relates to a composite cement grinding aid and a preparation method thereof.
Background
The cement enterprise has high energy consumption, high resource consumption and serious pollution, and the high-efficiency composite cement grinding aid technology is an important way for the enterprise to save energy, reduce emission, develop circular economy and build a resource-saving and environment-friendly industry;
the cement grinding aid is used as a chemical additive in the cement grinding process, is adsorbed on the surface of cement in the cement grinding process, improves the physical and chemical properties of the cement, exerts effects on physical and chemical effects, can improve the machine-hour output of the cement under the condition of keeping the fineness of the ground cement and the power of a grinding machine unchanged, or increases the specific surface area of the cement and improves the grain size grading of the ground cement under the condition of keeping the cement output and the power of the grinding machine unchanged, thereby improving the quality indexes such as the strength of the cement. The grinding efficiency is obviously improved, the energy consumption in the grinding process is reduced, the specific surface area of the cement is increased, and the grain size distribution of the ground cement is improved, so that the quality indexes such as the strength of the cement are improved.
The existing cement grinding aid comprises a powder grinding aid and a liquid grinding aid, and although the powder grinding aid such as a sodium chloride grinding aid is low in cost, the powder grinding aid has the problems of large doping amount and influence on the durability of concrete; the liquid grinding aid has the problems that the grinding aid effect is not ideal, the cement strength cannot be improved, and the like, and the liquid grinding aid is high in cost; in addition, the adaptability of the existing grinding aid is limited, and the grinding aid effect of cement of different grades cannot be effectively improved, so that the cement meets the standard requirement.
Therefore, on the basis of the existing analytical research on cement grinding aids, research and development of a novel cement grinding aid which not only has good grinding aid effect and improves the machine-hour yield of cement, but also can improve the strength, standard consistency and setting time of the cement and reduce the production cost are urgently needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a composite cement grinding aid; the composite cement grinding aid belongs to a high-strength, enhanced and low-consumption cement grinding aid; the grinding efficiency of a cement grinding machine can be remarkably improved by 17-21%; the 3-day strength of the cement can be obviously improved by 3-4MPa and the 28-day strength of the cement can be increased by 6-8MPa;
in order to achieve the purpose, the invention adopts the following technical scheme:
a composite cement grinding aid, which comprises the following raw materials: diethanol monoisopropanolamine, polymeric polyol, sodium thiocyanate, glycerol, a retarder and water.
Further, the grinding aid comprises the following raw materials in percentage by mass: 5-8% of diethanol monoisopropanolamine, 10-15% of polymeric polyol, 4-8% of sodium thiocyanate, 2-4% of glycerol, 1-3% of retarder and the balance of water.
Preferably, the grinding aid comprises the following raw materials in percentage by mass: 6.5% of diethanol monoisopropanolamine, 12.5% of polymeric polyol, 6% of sodium thiocyanate, 3% of glycerol, 2% of retarder and the balance of water.
Preferably, the polymeric polyol is one or more of diglycerol, triglycerol and polydiethylene glycol.
Preferably, the retarder consists of dioctyl sodium sulfosuccinate, sodium lignin sulfonate and white granulated sugar.
Preferably, the weight ratio of the dioctyl sodium sulfosuccinate to the sodium lignin sulfonate to the white granulated sugar is 1.
Adding sodium thiocyanate into water, stirring uniformly, adding a retarder while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Advantageous effects
The cement grinding aid prepared by the invention can obviously improve the grinding efficiency of a cement grinding machine by 17-21%, obviously improve the 3-day strength of the cement by 3-4MPa and increase the 28-day strength of the cement by 6-8MPa;
the composite cement grinding aid can ensure the adaptability of cement and concrete admixture; the components are mutually cooperated, so that the adaptability of the grinding aid is improved, the grinding aid is suitable for cement of different grades, the application range of the cement grinding aid is expanded, the grinding aid effect is greatly improved, the machine-hour yield is improved, and the energy consumption is reduced;
the composite formula of the composite cement grinding aid does not contain any harmful component, and meets the requirement of environmental protection.
Detailed Description
The technical scheme of the invention is explained in detail by combining specific examples, the raw materials used in the invention can be obtained from the market without special description, and the adopted method is a conventional method without special description.
Example 1
The composite cement grinding aid comprises the following raw materials in percentage by mass: 5% of diethanol monoisopropanolamine, 10% of polymeric polyol, 4% of sodium thiocyanate, 2% of glycerol, 1% of retarder and the balance of water; the polymeric polyol is diglycerol; the retarder consists of dioctyl sodium sulfosuccinate, sodium lignin sulfonate and white granulated sugar in a weight ratio of 1;
the preparation method of the composite cement grinding aid comprises the following steps of adding sodium thiocyanate into water, uniformly stirring, adding a retarder into the water while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, continuously stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Example 2
The composite cement grinding aid comprises the following raw materials in percentage by mass: 6.5% of diethanol monoisopropanolamine, 12.5% of polymeric polyol, 6% of sodium thiocyanate, 3% of glycerol, 2% of retarder and the balance of water; the polymeric polyol is diglycerol; the retarder consists of dioctyl sodium sulfosuccinate, sodium lignosulfonate and white granulated sugar in a weight ratio of 1;
the preparation method of the composite cement grinding aid comprises the following steps of adding sodium thiocyanate into water, uniformly stirring, adding a retarder into the water while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, continuously stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Example 3
The composite cement grinding aid comprises the following raw materials in percentage by mass: 6.5% of diethanol monoisopropanolamine, 12.5% of polymeric polyol, 6% of sodium thiocyanate, 3% of glycerol, 2% of retarder and the balance of water; the polymeric polyol is triglycerol; the retarder consists of dioctyl sodium sulfosuccinate, sodium lignosulfonate and white granulated sugar in a weight ratio of 1;
the preparation method of the composite cement grinding aid specifically comprises the following steps of adding sodium thiocyanate into water, stirring uniformly, adding a retarder into the water while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Example 4
The composite cement grinding aid comprises the following raw materials in percentage by mass: 6.5% of diethanol monoisopropanolamine, 12.5% of polymeric polyol, 6% of sodium thiocyanate, 3% of glycerol, 2% of retarder and the balance of water; the polymeric polyol is polyethylene glycol; the retarder consists of dioctyl sodium sulfosuccinate, sodium lignosulfonate and white granulated sugar in a weight ratio of 1;
the preparation method of the composite cement grinding aid specifically comprises the following steps of adding sodium thiocyanate into water, stirring uniformly, adding a retarder into the water while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Example 5
The composite cement grinding aid comprises the following raw materials in percentage by mass: 8% of diethanol monoisopropanolamine, 15% of polymeric polyol, 8% of sodium thiocyanate, 4% of glycerol, 3% of retarder and the balance of water; the polymeric polyol is diglycerol; the retarder consists of dioctyl sodium sulfosuccinate, sodium lignin sulfonate and white granulated sugar in a weight ratio of 1;
the preparation method of the composite cement grinding aid specifically comprises the following steps of adding sodium thiocyanate into water, stirring uniformly, adding a retarder into the water while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Comparative example 1
The composite cement grinding aid comprises the following raw materials in percentage by mass: 6.5% of diethanol monoisopropanolamine, 12.5% of polymeric polyol, 6% of sodium sulfate, 3% of glycerol, 2% of retarder and the balance of water; the polymeric polyol is diglycerol; the retarder consists of dioctyl sodium sulfosuccinate, sodium lignosulfonate and white granulated sugar in a weight ratio of 1;
adding sodium sulfate into water, uniformly stirring, adding a retarder while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, continuously stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid; the cement grinding aid obtained by the method has poor adaptability and cannot meet the requirements of different types of cement.
Comparative example 2
The composite cement grinding aid comprises the following raw materials in percentage by mass: 6.5% of diethanol monoisopropanolamine, 12.5% of polymeric polyol, 6% of sodium thiocyanate, 3% of glycerol, 2% of retarder and the balance of water; the polymeric polyol is diglycerol; the retarder consists of sodium lignosulphonate and white granulated sugar in a weight ratio of 1:1;
the preparation method of the composite cement grinding aid specifically comprises the following steps of adding sodium thiocyanate into water, stirring uniformly, adding a retarder into the water while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Cement grinding aid effect verification
The cement grinding aids prepared in the embodiments 1-5 and the comparative example 2 of the invention are respectively doped in the grinding process of the cement raw material (the doping amount of the grinding aid is 1 per mill), wherein the cement grinding is carried out by adopting a tube mill; respectively testing the grinding aid effect of the grinding aid, and testing the corresponding cement strength according to the method described in GB175-1999, wherein the cement grinding aid is not doped as a blank control group; the test results are shown in table 1; wherein the adopted cement is P.042.5 cement.
TABLE 1 Cement grinding aid test results
As can be seen from the test results of the cement grinding aid in the table 1, the cement grinding aid can remarkably improve the grinding efficiency of a cement grinding machine by 17-21%, shows good grinding-aid effect, and can remarkably improve the 3-day strength (3-4 MPa) and the 28-day strength (6-8 MPa) of the cement;
the high-strength, enhanced and low-consumption cement grinding aid is obtained, a good grinding aid effect is achieved under the condition of less adding amount of the cement grinding aid, and the strength of cement can be enhanced.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any simple changes or equivalent substitutions which can be obviously derived from the technical scope of the present invention by those skilled in the art can be made within the technical scope of the present invention.
Claims (7)
1. The composite cement grinding aid is characterized by comprising the following raw materials: diethanol monoisopropanolamine, polymeric polyol, sodium thiocyanate, glycerol, a retarder and water.
2. The composite cement grinding aid of claim 1, wherein the grinding aid comprises the following raw materials in percentage by mass: 5-8% of diethanol monoisopropanolamine, 10-15% of polymeric polyol, 4-8% of sodium thiocyanate, 2-4% of glycerol, 1-3% of retarder and the balance of water.
3. The composite cement grinding aid of claim 1, wherein the grinding aid comprises the following raw materials in percentage by mass: 6.5% of diethanol monoisopropanolamine, 12.5% of polymeric polyol, 6% of sodium thiocyanate, 3% of glycerol, 2% of retarder and the balance of water.
4. The composite cement grinding aid of claim 1, wherein the polymeric polyol is one or more of diglycerol, triglycerol and polydiethylene glycol.
5. The composite cement grinding aid of claim 1, wherein the retarder consists of dioctyl sodium sulfosuccinate, sodium lignosulfonate, and white granulated sugar.
6. The composite cement grinding aid of claim 1, wherein the weight ratio of dioctyl sodium sulfosuccinate, sodium lignosulfonate and white granulated sugar is 1.
7. The composite cement grinding aid of claim 1, wherein the preparation method of the composite cement grinding aid comprises the following steps of adding sodium thiocyanate into water, stirring uniformly, adding a retarder while stirring, heating to 45-55 ℃, sequentially adding diethanol monoisopropanolamine, polymeric polyol and glycerol, stirring uniformly, and cooling to normal temperature to obtain the composite cement grinding aid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211737777.7A CN115893907A (en) | 2022-12-31 | 2022-12-31 | Composite cement grinding aid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211737777.7A CN115893907A (en) | 2022-12-31 | 2022-12-31 | Composite cement grinding aid and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115893907A true CN115893907A (en) | 2023-04-04 |
Family
ID=86480930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211737777.7A Pending CN115893907A (en) | 2022-12-31 | 2022-12-31 | Composite cement grinding aid and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115893907A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103641370A (en) * | 2013-10-12 | 2014-03-19 | 史才军 | Composite cement enhanced grinding aid containing amide polyamine polycarboxylic acids and preparation method therefor |
| CN108017296A (en) * | 2016-10-28 | 2018-05-11 | 湖南昌迪环境科技有限公司 | A kind of grinding aid and its application |
| CN108017297A (en) * | 2016-10-28 | 2018-05-11 | 湖南昌迪环境科技有限公司 | The method and cement grinding aid of a kind of cement grinding |
| CN112645628A (en) * | 2020-09-10 | 2021-04-13 | 唐山盾石干粉建材有限责任公司 | Formula and preparation process of novel powder cement grinding aid |
| CN115028386A (en) * | 2022-03-28 | 2022-09-09 | 史才军 | Compound cement grinding aid containing monoethanol diisopropanolamine and preparation method thereof |
-
2022
- 2022-12-31 CN CN202211737777.7A patent/CN115893907A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103641370A (en) * | 2013-10-12 | 2014-03-19 | 史才军 | Composite cement enhanced grinding aid containing amide polyamine polycarboxylic acids and preparation method therefor |
| CN108017296A (en) * | 2016-10-28 | 2018-05-11 | 湖南昌迪环境科技有限公司 | A kind of grinding aid and its application |
| CN108017297A (en) * | 2016-10-28 | 2018-05-11 | 湖南昌迪环境科技有限公司 | The method and cement grinding aid of a kind of cement grinding |
| CN112645628A (en) * | 2020-09-10 | 2021-04-13 | 唐山盾石干粉建材有限责任公司 | Formula and preparation process of novel powder cement grinding aid |
| CN115028386A (en) * | 2022-03-28 | 2022-09-09 | 史才军 | Compound cement grinding aid containing monoethanol diisopropanolamine and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110818310A (en) | Concrete glue reducing agent and preparation method and application thereof | |
| CN110282901B (en) | Cement grinding aid and preparation method thereof | |
| CN103396158B (en) | A kind of Antibacterial molybdenum tailings air-entrained concrete building block and preparation method thereof | |
| CN101560421B (en) | High-concentration desulfurized coal water mixture additive and preparation method thereof | |
| CN112456855A (en) | Liquid grinding aid for improving later strength of cement and preparation method thereof | |
| CN115028386A (en) | Compound cement grinding aid containing monoethanol diisopropanolamine and preparation method thereof | |
| CN107601945B (en) | Preparation method of carboxyl-containing modified chitin bio-based retarding superplasticizer | |
| CN112441797A (en) | Environment-friendly admixture concrete and preparation method thereof | |
| CN115259725A (en) | Lead-zinc tailing concrete composite admixture and preparation method thereof | |
| CN111635200A (en) | High-strength anti-permeability anti-freezing concrete and preparation method thereof | |
| CN115893907A (en) | Composite cement grinding aid and preparation method thereof | |
| CN102491673B (en) | Efficient composite liquid cement grinding aid and preparation method thereof | |
| CN113200701B (en) | Grinding aid for improving cement durability and preparation method thereof | |
| CN109503021B (en) | Concrete antifreezing agent and preparation method thereof | |
| CN114890695B (en) | Cement raw material grinding aid and preparation method thereof | |
| CN101708972B (en) | Liquid composite cement grinding aid and preparation method thereof | |
| KR100448343B1 (en) | Admixture for concrete comprising molasses fermentation by-product | |
| CN114804704B (en) | Environment-friendly chlorine-free cement grinding aid and production method thereof | |
| CN115432969A (en) | Biochar concrete with carbon fixing capacity for 3D printing and preparation method thereof | |
| CN101948268A (en) | Composite concrete grinding-assistant reinforcing agent | |
| CN104030593A (en) | Steel slag/limestone composite admixture for concrete and preparation method thereof | |
| CN104692684A (en) | Cement grinding process | |
| CN114181709A (en) | Liquid soil curing agent for improving water resistance and preparation method thereof | |
| CN110143776B (en) | Enhanced polyether amine concrete glue reducing agent | |
| CN112279610A (en) | Production method for producing concrete composite mineral admixture by using industrial waste residues |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |