CN112608428A - Water-reducing cement grinding aid and preparation method and application thereof - Google Patents
Water-reducing cement grinding aid and preparation method and application thereof Download PDFInfo
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- CN112608428A CN112608428A CN202011494880.4A CN202011494880A CN112608428A CN 112608428 A CN112608428 A CN 112608428A CN 202011494880 A CN202011494880 A CN 202011494880A CN 112608428 A CN112608428 A CN 112608428A
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- polyoxyethylene ether
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- 239000004568 cement Substances 0.000 title claims abstract description 68
- 238000000227 grinding Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 29
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 29
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- ASUAYTHWZCLXAN-UHFFFAOYSA-N prenol Chemical compound CC(C)=CCO ASUAYTHWZCLXAN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 19
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 16
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004132 cross linking Methods 0.000 claims abstract description 14
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 239000012986 chain transfer agent Substances 0.000 claims abstract description 11
- 239000003999 initiator Substances 0.000 claims abstract description 11
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 8
- 235000010323 ascorbic acid Nutrition 0.000 claims abstract description 8
- 239000011668 ascorbic acid Substances 0.000 claims abstract description 8
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 claims abstract description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 125000001844 prenyl group Chemical group [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 7
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 7
- 229920005862 polyol Polymers 0.000 claims description 7
- 150000003077 polyols Chemical class 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims 1
- 239000004721 Polyphenylene oxide Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 229920000570 polyether Polymers 0.000 abstract description 3
- 230000001603 reducing effect Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 54
- 239000008399 tap water Substances 0.000 description 12
- 235000020679 tap water Nutrition 0.000 description 12
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- 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
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
- C04B24/2647—Polyacrylates; Polymethacrylates containing polyether side chains
-
- 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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
-
- 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
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- 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
- C08F4/00—Polymerisation catalysts
- C08F4/28—Oxygen or compounds releasing free oxygen
- C08F4/30—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a water-reducing cement grinding aid and a preparation method and application thereof, wherein the water-reducing cement grinding aid takes hydrogen peroxide as a chain initiator and mercaptopropionic acid and/or ascorbic acid as a chain transfer agent, polyether macromonomer (prenol polyoxyethylene ether) and acrylic acid are synthesized into comb-shaped polycarboxylic acid with excellent performance at the low temperature of 20-40 ℃, and then a certain amount of crosslinking monomer is added into the synthesized comb-shaped polycarboxylic acid according to the principle of molecular structure design to change the molecular structure of the polycarboxylic acid, so that the micro-crosslinked polycarboxylic acid water-reducing cement grinding aid with better grinding aid, water reducing property and dispersibility and higher early and later strength of cement is synthesized.
Description
Technical Field
The invention belongs to the technical field of cement production, and particularly relates to a water-reducing cement grinding aid and a preparation method and application thereof.
Background
The cement industry is a supporting industry of national economic construction, the yield of the cement industry is continuously developed for years, the cement industry is an industry with large energy consumption and more use, and in order to meet the requirements of energy conservation and consumption reduction and realize the sustainable development policy of the cement industry, the important functions of the cement grinding aid and the concrete water reducing agent must be fully exerted.
The cement grinding is used as a process link with the highest energy consumption in the cement production process, and the problems of reduction of cement powder selection efficiency, reduction of grinding efficiency and the like are often caused in the grinding process. The cement grinding aid is a chemical additive for improving the grinding effect and performance of cement, can obviously improve the machine-hour output of cement and the strength of cement at each age, and improves the fluidity of the cement.
The water reducing agent mainly has the functions of reducing the mixing water consumption of the concrete and improving the strength and durability of the concrete under the condition of not influencing the workability of concrete mixtures. The mixing amount of the cement is about 0.2-0.8 percent of the mass of the cement.
The addition of the water reducing agent not only reduces the consumption of cement and the mixing water consumption of concrete, but also is beneficial to the improvement of the durability, the strength, the stability and the like of the concrete.
In order to meet the requirements of economic development and infrastructure, concrete is increasingly widely applied, and along with the application of concrete, concrete admixtures such as a water reducing agent, an air entraining agent, an early strength agent, a pumping aid, a retarder, an expanding agent and the like are common chemical admixtures in the market. These admixtures are too cumbersome to add during construction, and increase the man-hour and construction cost.
Disclosure of Invention
The purpose is as follows: in order to solve the defects of the prior art, the invention provides a water-reducing cement grinding aid and a preparation method and application thereof. Hydrogen peroxide is used as a chain initiator, mercaptopropionic acid and/or ascorbic acid is used as a chain transfer agent, a polyether macromonomer (prenol polyoxyethylene ether) and acrylic acid are synthesized into comb-shaped polycarboxylic acid with excellent performance at low temperature, one or a mixture of a certain amount of triethanolamine, triisopropanolamine, glycerol, polymerized polyol and glycol is added into the synthesized comb-shaped polycarboxylic acid as a crosslinking monomer according to the molecular structure design principle, the molecular structure of the polycarboxylic acid is changed, and the micro-crosslinked polycarboxylic acid water-reducing cement grinding aid which has better grinding aid, water reducing property and dispersibility and can ensure that the early-stage strength and the later-stage strength of the cement are higher is synthesized.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a water-reducing cement grinding aid is composed of the following components: 16-28% of comb-shaped polycarboxylic acid, 42-57% of crosslinking monomer and the balance of water, wherein the total amount is 100%; the percentages are mass percentages;
the comb-shaped polycarboxylic acid is prepared by synthesizing prenyl polyoxyethylene ether and acrylic acid at 20-40 ℃ by taking hydrogen peroxide as a chain initiator and mercaptopropionic acid and/or ascorbic acid as a chain transfer agent; in the preparation process, the mass ratio of the added acrylic acid to the prenyl alcohol polyoxyethylene ether is 2.8-4, and the addition amount of the chain initiator hydrogen peroxide is 0.1-0.2% of the mass of the prenyl alcohol polyoxyethylene ether; the addition amount of the chain transfer agent is 0.30-0.41% of the mass of the prenyl alcohol polyoxyethylene ether.
In some embodiments, the crosslinking monomer is one or a mixture of triethanolamine, triisopropanolamine, glycerol, polymeric polyol and ethylene glycol.
In some embodiments, the prenyl polyoxyethylene ether has a molecular weight of 2400 g/mol.
On the other hand, the invention also provides a preparation method of the water-reducing cement grinding aid, which comprises the following steps:
1) adding prenyl alcohol polyoxyethylene ether into a container, placing the container in a water bath, keeping the constant temperature at 20-40 ℃, adding a proper amount of water, stirring until the prenyl alcohol polyoxyethylene ether is completely dissolved in the water to form a transparent solution serving as a base solution, adding a chain initiator hydrogen peroxide into the base solution, and uniformly mixing to obtain a solution A;
2) dissolving acrylic acid in water, and marking as a solution B;
3) dissolving a chain transfer agent in water, and marking as a solution C;
4) in the stirring process, dropwise adding the solution B and the solution C into the solution A, and keeping the temperature of the system constant at 20-40 ℃ to obtain a comb-shaped polycarboxylic acid system;
5) adding a water-soluble crosslinking monomer into a comb-shaped polycarboxylic acid system, keeping the temperature constant at 20-40 ℃, stirring and reacting for a certain time, and then adding a proper amount of sodium hydroxide solution into the system for quenching reaction to obtain the water-reducing cement grinding aid.
In some embodiments, the mass ratio of the added acrylic acid to the prenyl polyoxyethylene ether during the preparation process is 2.8-4.
The addition amount of the chain initiator hydrogen peroxide is 0.1-0.2% of the mass of the prenyl alcohol polyoxyethylene ether.
The addition amount of the chain transfer agent is 0.30-0.41% of the mass of the prenyl alcohol polyoxyethylene ether.
In the steps 1), 4) and 5), the temperature of the constant-temperature reaction is 30 ℃;
in the step 4), the dripping speed is controlled to finish the dripping of the solution B within 2-3h, and the dripping of the solution C within 1-2 h;
in the step 5), after the crosslinking monomer is added, stirring and reacting for 1-2 h.
In a third aspect, the invention also provides the application of the water-reducing cement grinding aid as an admixture for cement and concrete.
Furthermore, the addition amount of the water-reducing cement grinding aid is six ten-thousandth of the cement ingredient.
Has the advantages that: the water-reducing cement grinding aid provided by the invention is prepared by taking hydrogen peroxide as a chain initiator and mercaptopropionic acid and/or ascorbic acid as a chain transfer agent, synthesizing a comb-shaped polycarboxylic acid from a polyether macromonomer (prenyl alcohol polyoxyethylene ether) and acrylic acid at low temperature, adding a certain amount of one or a mixture of triethanolamine, triisopropanolamine, glycerol, polymeric polyol and ethylene glycol into the synthesized comb-shaped polycarboxylic acid according to a molecular structure design principle to serve as a crosslinking monomer, and slightly changing the molecular structure of the polycarboxylic acid to synthesize the water-reducing cement grinding aid. The water-reducing cement grinding aid can better disperse cement particles during grinding due to the special molecular structure, reduce the agglomeration phenomenon of the cement particles and eliminate the electrostatic effect. And the water-reducing cement grinding aid has a very obvious water-reducing effect on cement, good stability and great improvement on early and later strength of the cement.
Detailed Description
The present invention is specifically illustrated below with reference to examples: the percentages in the invention are mass percentages.
Example 1
A preparation method of a water-reducing cement grinding aid comprises the following steps:
firstly, adding 1g of prenyl alcohol polyoxyethylene ether into a four-neck flask with a mechanical stirrer and a thermometer, placing the four-neck flask into a water bath kettle, keeping the temperature to 20 ℃, adding 5ml of tap water, stirring until the prenyl alcohol polyoxyethylene ether is completely dissolved in water to form a transparent solution serving as a base solution, and adding 0.001g of hydrogen peroxide into the base solution to obtain a solution A.
Secondly, dissolving 3g of acrylic acid in 15ml of tap water, and marking as a solution B;
thirdly, adding a mixed solution of 0.001g of thioglycolic acid and 0.002g of ascorbic acid into 10ml of tap water, stirring and dissolving to obtain a solution C;
and fourthly, continuously dripping the solution B and the solution C into the solution A while stirring, controlling the dripping speed to finish dripping the solution B within 2 hours, controlling the dripping speed to finish dripping the solution C within 1 hour, keeping the temperature of the system constant at 20 ℃, adding 10.5g of one or a mixture of more of crosslinking monomer triethanolamine, triisopropanolamine, glycerol, polymeric polyol and glycol dissolved in 10.5g of tap water into the system after finishing dripping the solution B and the solution C, continuously stirring at constant temperature for reaction for 1-2 hours, and then adding 0.5g of sodium hydroxide aqueous solution into the system for quenching reaction to obtain the water-reducing cement grinding aid finished product 1.
Example 2
A preparation method of a water-reducing cement grinding aid comprises the following steps:
firstly, adding 5g of prenyl alcohol polyoxyethylene ether into a four-neck flask with a mechanical stirrer and a thermometer, placing the four-neck flask into a water bath kettle, keeping the temperature to 40 ℃, adding 25ml of tap water, stirring until the prenyl alcohol polyoxyethylene ether is completely dissolved in water to form a transparent solution serving as a base solution, and adding 0.01g of hydrogen peroxide into the base solution to obtain a solution A.
Secondly, dissolving 20.5g of acrylic acid in 90ml of tap water, and marking as a solution B;
thirdly, adding a mixed solution of 0.0105g of thioglycolic acid and 0.01g of ascorbic acid into 20ml of tap water, stirring and dissolving to obtain a solution C;
and fourthly, continuously dripping the solution B and the solution C into the solution A while stirring, controlling the dripping speed to finish dripping the solution B within 3 hours, controlling the dripping speed to finish dripping the solution C within 2 hours, keeping the temperature of the system constant at 40 ℃, adding 51.9g of one or a mixture of more of crosslinking monomer triethanolamine, triisopropanolamine, glycerol, polymeric polyol and glycol dissolved in 30ml of tap water into the system after finishing dripping the solution B and the solution C, continuously stirring at constant temperature for reaction for 1 hour, and then adding 5g of sodium hydroxide aqueous solution into the system for quenching reaction to obtain a water-reducing grinding aid finished product 2.
Example 3
A preparation method of a water-reducing cement grinding aid comprises the following steps:
firstly, adding 3g of prenyl alcohol polyoxyethylene ether into a four-neck flask with a mechanical stirrer and a thermometer, placing the four-neck flask into a water bath kettle, keeping the temperature to 30 ℃, adding 15ml of tap water, stirring until the prenyl alcohol polyoxyethylene ether is completely dissolved in water to form a transparent solution serving as a base solution, and adding 0.0045g of hydrogen peroxide into the base solution to obtain a solution A.
Secondly, 9.9g of acrylic acid is dissolved in 45ml of tap water and is marked as solution B;
thirdly, adding a mixed solution of 0.0035g of thioglycolic acid and 0.007g of ascorbic acid into 15ml of tap water, stirring and dissolving to obtain a solution C;
fourthly, continuously dripping the solution B and the solution C at the same time and stirring the solution B and the solution C into the solution A,
and after the dripping speed of the solution B is controlled to be finished within 2.5 hours, the dripping of the solution C is finished within 1.5 hours, keeping the temperature of the system constant at 30 ℃, adding 28.04g of one or a mixture of more of crosslinking monomers triethanolamine, triisopropanolamine, glycerol, polymeric polyol and ethylene glycol dissolved in 15ml of tap water into the system after the dripping of the solution B and the solution C is finished, continuing stirring at constant temperature for reaction for 1 hour, and then adding 0.25g of sodium hydroxide aqueous solution into the system for quenching reaction to obtain the water-reducing cement grinding aid finished product 3.
Performance testing
According to the application method, the addition amount of the water-reducing cement grinding aid is six ten-thousandth of the cement ingredient.
Sampling the cement according to a cement sampling method GB/T12573, and measuring the physical properties of the cement according to a test method for detecting the properties of the cement. Testing the specific surface area of the cement according to GB/T8074 and 2008 & lt & gt method for determining specific surface area of cement & lt & gt Brinell method & gt; the strength of the cement mortar is determined according to GB/T17671-1999 method for testing the strength of cement mortar (ISO method).
The results are shown in the following table:
the present invention has been disclosed in terms of the preferred embodiment, but it is not intended to be limited to the embodiment, and all technical solutions obtained by substituting or converting the equivalent embodiments fall within the scope of the present invention.
Claims (10)
1. The water-reducing cement grinding aid is characterized by comprising the following components: 16-28% of comb-shaped polycarboxylic acid, 42-57% of crosslinking monomer and the balance of water, wherein the total amount is 100%; the percentages are mass percentages;
the comb-shaped polycarboxylic acid is prepared by synthesizing prenyl polyoxyethylene ether and acrylic acid at 20-40 ℃ by taking hydrogen peroxide as a chain initiator and mercaptopropionic acid and/or ascorbic acid as a chain transfer agent; in the preparation process, the mass ratio of the added acrylic acid to the prenyl alcohol polyoxyethylene ether is 2.8-4, and the addition amount of the chain initiator hydrogen peroxide is 0.1-0.2% of the mass of the prenyl alcohol polyoxyethylene ether; the addition amount of the chain transfer agent is 0.30-0.41% of the mass of the prenyl alcohol polyoxyethylene ether.
2. The water-reducing cement grinding aid according to claim 1, wherein the crosslinking monomer is one or a mixture of triethanolamine, triisopropanolamine, glycerol, polymeric polyol and ethylene glycol.
3. The water-reducing cement grinding aid as claimed in claim 1 or 2, wherein the molecular weight of the prenyl polyoxyethylene ether is 2400 g/mol.
4. The method for preparing a water-reducing cement grinding aid according to any one of claims 1 to 3, comprising:
1) adding prenyl alcohol polyoxyethylene ether into a container, placing the container in a water bath, keeping the constant temperature at 20-40 ℃, adding a proper amount of water, stirring until the prenyl alcohol polyoxyethylene ether is completely dissolved in the water to form a transparent solution serving as a base solution, adding a chain initiator hydrogen peroxide into the base solution, and uniformly mixing to obtain a solution A;
2) dissolving acrylic acid in water, and marking as a solution B;
3) dissolving a chain transfer agent in water, and marking as a solution C;
4) in the stirring process, dropwise adding the solution B and the solution C into the solution A, and keeping the temperature of the system constant at 20-40 ℃ to obtain a comb-shaped polycarboxylic acid system;
5) adding a water-soluble crosslinking monomer into a comb-shaped polycarboxylic acid system, keeping the temperature constant at 20-40 ℃, stirring and reacting for a certain time, and then adding a proper amount of sodium hydroxide solution into the system for quenching reaction to obtain the water-reducing cement grinding aid.
5. The preparation method of the water-reducing cement grinding aid as claimed in claim 4, wherein the mass ratio of the added acrylic acid to the prenyl polyoxyethylene ether is 2.8-4 during the preparation process.
6. The preparation method of the water-reducing cement grinding aid according to claim 4, wherein the addition amount of the chain initiator hydrogen peroxide is 0.1-0.2% of the mass of the prenyl polyoxyethylene ether.
7. The preparation method of the water-reducing cement grinding aid as claimed in claim 4, wherein the addition amount of the chain transfer agent is 0.30-0.41% of the mass of the prenyl polyoxyethylene ether.
8. The preparation method of the water-reducing cement grinding aid according to claim 4, wherein in the steps 1), 4) and 5), the temperature of the isothermal reaction is 30 ℃;
and/or in the step 4), controlling the dropping speed to finish the dropping of the solution B within 2-3h, and finishing the dropping of the solution C within 1-2 h;
and/or, in the step 5), after the crosslinking monomer is added, stirring and reacting for 1-2 h.
9. Use of the water-reducing cement grinding aid of any one of claims 1 to 8 as an admixture for cement and concrete.
10. The use of claim 9, wherein the water-reducing cement grinding aid is incorporated in an amount of six parts per million of the cement formulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011494880.4A CN112608428A (en) | 2020-12-17 | 2020-12-17 | Water-reducing cement grinding aid and preparation method and application thereof |
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| CN202011494880.4A CN112608428A (en) | 2020-12-17 | 2020-12-17 | Water-reducing cement grinding aid and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417616A (en) * | 2022-10-08 | 2022-12-02 | 临沂海螺新材料科技有限公司 | Grinding aid for vertical mill cement and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153308A (en) * | 2011-05-17 | 2011-08-17 | 北京金隅水泥节能科技有限公司 | Cement liquid grinding aid and preparation method thereof |
| CN102796234A (en) * | 2012-08-15 | 2012-11-28 | 聊城天成水泥科技研发有限公司 | Preparation method of high efficiency controllable polycarboxylic acids series cement grinding aid |
| CN104530327A (en) * | 2014-12-31 | 2015-04-22 | 北京厚德交通科技有限公司 | Novel polycarboxylic acid type cement additive and synthesis method thereof |
| CN105669910A (en) * | 2016-01-05 | 2016-06-15 | 河南新汉材料科技有限公司 | Polycarboxylic cement grinding aid and preparation method thereof |
| CN107286297A (en) * | 2016-04-11 | 2017-10-24 | 新疆西部卓越建材有限公司 | A kind of poly carboxylic acid modified alcamines cement grinding aid and preparation method thereof |
| CN108997535A (en) * | 2018-06-07 | 2018-12-14 | 河北三楷深发科技股份有限公司 | A kind of high-early strength type polycarboxylic acids dehydragent and preparation method thereof |
| CN109748535A (en) * | 2019-03-29 | 2019-05-14 | 日照弗尔曼新材料科技有限公司 | A kind of cement grinding aid and preparation method thereof |
-
2020
- 2020-12-17 CN CN202011494880.4A patent/CN112608428A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153308A (en) * | 2011-05-17 | 2011-08-17 | 北京金隅水泥节能科技有限公司 | Cement liquid grinding aid and preparation method thereof |
| CN102796234A (en) * | 2012-08-15 | 2012-11-28 | 聊城天成水泥科技研发有限公司 | Preparation method of high efficiency controllable polycarboxylic acids series cement grinding aid |
| CN104530327A (en) * | 2014-12-31 | 2015-04-22 | 北京厚德交通科技有限公司 | Novel polycarboxylic acid type cement additive and synthesis method thereof |
| CN105669910A (en) * | 2016-01-05 | 2016-06-15 | 河南新汉材料科技有限公司 | Polycarboxylic cement grinding aid and preparation method thereof |
| CN107286297A (en) * | 2016-04-11 | 2017-10-24 | 新疆西部卓越建材有限公司 | A kind of poly carboxylic acid modified alcamines cement grinding aid and preparation method thereof |
| CN108997535A (en) * | 2018-06-07 | 2018-12-14 | 河北三楷深发科技股份有限公司 | A kind of high-early strength type polycarboxylic acids dehydragent and preparation method thereof |
| CN109748535A (en) * | 2019-03-29 | 2019-05-14 | 日照弗尔曼新材料科技有限公司 | A kind of cement grinding aid and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417616A (en) * | 2022-10-08 | 2022-12-02 | 临沂海螺新材料科技有限公司 | Grinding aid for vertical mill cement and preparation method thereof |
| CN115417616B (en) * | 2022-10-08 | 2023-09-22 | 临沂海螺新材料科技有限公司 | Grinding aid for vertical mill cement and preparation method thereof |
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