CN109081629A - A kind of no chlorine enhancing collapse protection type cement grinding aid and preparation method thereof - Google Patents
A kind of no chlorine enhancing collapse protection type cement grinding aid and preparation method thereof Download PDFInfo
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- CN109081629A CN109081629A CN201811020034.1A CN201811020034A CN109081629A CN 109081629 A CN109081629 A CN 109081629A CN 201811020034 A CN201811020034 A CN 201811020034A CN 109081629 A CN109081629 A CN 109081629A
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- grinding aid
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- sodium formate
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
Abstract
The present invention provides a kind of no chlorine to enhance collapse protection type cement grinding aid.Component including following parts by weight: 2~8 parts of diethanol monoisopropanolamine, 6~20 parts of triethanolamine, 10~25 parts of sodium formate, 0.5~2 part of organic phosphonate retarder, 0.5~2 part of polymeric dispersant, 2~4 parts of molasses, excess water.The invention has the advantages that diethanol monoisopropanolamine is used cooperatively with triethanolamine and sodium formate, increase significantly to cement early stage and later strength characteristic；Organic phosphonate retarder and polymeric dispersant compatible use make cement have excellent function of slump protection, good with the adaptability of concrete admixture；In actual use, cement early stage and later strength improve 3~5MPa, all good with the adaptability of naphthalene system, aliphatic and polycarboxylic acids three classes water-reducing agent, and flowing degree of net paste of cement 2 hours do not lose；And any chloride ion and sulfate ion ingredient are free of, it is nontoxic, environmentally protective, it is non-corrosive, human body and building etc. are not damaged.
Description
Technical field
The present invention relates to cement additive technical field more particularly to a kind of no chlorine enhancing collapse protection type cement grinding aid and its
Preparation method.
Background technique
Manufacture of cement is typical high pollution high energy consumption industry, under the main trend for pursuing Green GDP, energy conservation is needed to subtract
Row, and cement grinding aid can be improved manufacture of cement efficiency, reduce energy consumption, improve as a kind of innovative application technology
Cement quality reduces conveying and mixes ratio.Currently, the domestic cement grinding aid used is divided into liquid and two kinds of powder, and to water
The function and effect of mud are single, and for example the cement later strength effect of early strength effect is unobvious, the morning for having later strength to act on
The effect of phase intensity is unobvious, and strength of cement cannot be lasting；Presently, there are common problem be exactly in order to reduce manufacture of cement cost,
Cement plant can greatly play clinker characteristic, and the very thin or second-rate mixing material of use of cement grinding mill causes water
The adaptability of mud is poor, and gradual loss is larger, and the function of slump protection of cement is poor, seriously affects its use effect in concrete
Fruit, and mostly containing the chloride ion for having corrosiveness to building iron in existing product, and have to building volume stability
The sulfate of influence seriously affects the durability of building.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of no chlorine enhancing collapse protection type cement grinding aid and its preparation sides
Method.Cement grinding aid grinding-aid effect provided by the invention is good, increases significantly to the intensity of cement early stage and later period；Cement
Function of slump protection is excellent, good with the adaptability of concrete admixture, greatly improves workability；And be free of any chloride ion
It is nontoxic, environmentally protective with sulfate ion ingredient, it is non-corrosive, human body and building are not damaged.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of no chlorine to enhance collapse protection type cement grinding aid, the component including following parts by weight:
2~8 parts of diethanol monoisopropanolamine
6~20 parts of triethanolamine
10~25 parts of sodium formate
0.5~2 part of organic phosphonate retarder
0.5~2 part of polymeric dispersant
2~4 parts of molasses
Excess water.
Preferably, the no chlorine enhanced cement grinding aid, the component including following parts by weight:
5 parts of diethanol monoisopropanolamine
8 parts of triethanolamine
15 parts of sodium formate
1 part of organic phosphonate retarder
1 part of polymeric dispersant
2 parts of molasses
68 parts of water.
Preferably, the organic phosphonate retarder include 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, 1-hydroxy ethylidene-1,1-diphosphonic acid potassium and
One of ethylene diamine tetra methylene phosphonic acid sodium is a variety of.
Preferably, the polymeric dispersant includes in poly-epoxy succinic acid, polyepoxy sodium succinate and Sodium Polyacrylate
It is one or more.
Preferably, the mass ratio of the organic phosphonate retarder and polymeric dispersant is (1~2): 1.
The present invention also provides the preparation methods without chlorine enhancing collapse protection type cement grinding aid described in above-mentioned technical proposal, including
Following steps:
1) raw material is weighed: diethanol monoisopropanolamine, triethanolamine, sodium formate, organic phosphonate retarder, polymer point
Powder, molasses, excess water；
2) agitator tank is added in the water of the step 1), stirring is slowly added to sodium formate, makes it completely dissolved, continues to stir
It mixes, obtains sodium formate solution；
3) into the sodium formate solution of the step 2), diethanol monoisopropanolamine, triethanolamine, organic phosphine are sequentially added
Hydrochlorate retarder, polymeric dispersant, stirring, obtain mixed liquor；
4) molasses are added in mixed liquor into the step 3), stir, obtains cement grinding aid.
Preferably, the step 3) mixing time is 2min.
Preferably, the step 4) mixing time is 5min.
The present invention provides a kind of no chlorine to enhance collapse protection type cement grinding aid, the component including following parts by weight: diethyl
2~8 parts of alcohol monoisopropanolamine, 6~20 parts of triethanolamine, 10~25 parts of sodium formate, 0.5~2 part of organic phosphonate retarder, gather
0.5~2 part of object dispersing agent of conjunction, 2~4 parts of molasses, excess water.Of the invention enhances collapse protection type cement grinding aid without chlorine with diethanol
Monoisopropanolamine, organic phosphonate retarder and polymeric dispersant are core material；Wherein diethanol list isopropanol and three second
Hydramine and sodium formate are used cooperatively, and are increased significantly to cement early stage and later strength characteristic；Organic phosphonate retarder
It is good with the adaptability of concrete admixture with polymeric dispersant compatible use, there is good function of slump protection；Actual use
In, cement early stage and later strength improve 3~5MPa, all with the adaptability of naphthalene system, aliphatic and polycarboxylic acids three classes water-reducing agent
It is good, and flowing degree of net paste of cement 2 hours do not lose；And be free of any chloride ion and sulfate ion ingredient, nontoxic, green ring
It protects, it is non-corrosive, human body and building etc. are not damaged.Also, organic phosphonate retarder and sodium gluconate, white sugar and
The common retarder such as sodium tripolyphosphate is compared, and high-efficient 3~5 times of slow setting, chemical stability and temperature tolerance are good, at 250 DEG C still
There is good retarding effect；And complex compound can be formed with calcium ion in cement slurry, can be very good to control at aquation initial stage
The concentration of calcium ion in liquid phase, and be adsorbed on the embryos of hydrated product cenotype well, change aquation in saturated solution
The speed that product embryos generates, thus there is preferable retarding effect.Polymeric dispersant can reduce the surface energy of particle, mention
The high affinity with decentralized medium, effectively inhibits intergranular agglomeration, discharges intergranular Interstitial Water, and then reduce cement
Consumptive use of water normal consistence improves cement performance, improves the mobility of particle, improves the property on cement slurry surface, to increase
Its dispersion performance increases particle surface hydrated sheath thickness, keeps slurry soft and mobility keeps preferable.When slow with organic phosphonate
When solidifying agent is used in combination, ideal synergistic effect is shown, the function of slump protection of cement slurry is significantly improved.
Specific embodiment
The present invention provides a kind of no chlorine to enhance collapse protection type cement grinding aid, the component including following parts by weight: diethyl
2~8 parts of alcohol monoisopropanolamine, 6~20 parts of triethanolamine, 10~25 parts of sodium formate, 0.5~2 part of organic phosphonate retarder, gather
0.5~2 part of object dispersing agent of conjunction, 2~4 parts of molasses, excess water.
It is 2~8 parts of diethanol list isopropyls that no chlorine enhancing collapse protection type cement grinding aid provided by the invention, which includes parts by weight,
Hydramine, preferably 3~7 parts, more preferably 4~6 parts.The present invention does not have special limit to the source of the ethyl alcohol monoisopropanolamine
It is fixed, using commercial product well known to those skilled in the art.In the present invention, the diethanol monoisopropanolamine is to cement
Early stage and later strength are significantly increased.
On the basis of the parts by weight of the diethanol monoisopropanolamine, no chlorine provided by the invention enhances collapse protection type cement
Grinding aid includes the triethanolamine that parts by weight are 6~20 parts, preferably 6~15 parts, more preferably 6~10 parts.The present invention couple
The source of the triethanolamine does not have special restriction, using commercial product well known to those skilled in the art.In this hair
In bright, the triethanolamine can consume a large amount of water, give off heat when reacting with other substances in cement,
Make moisture in cement and tail off because of reaction and evaporation is participated in, the glue of cement when compactness is improved, to improve
The intensity of cement.
On the basis of the parts by weight of the diethanol monoisopropanolamine, no chlorine provided by the invention enhances collapse protection type cement
Grinding aid includes the sodium formate that parts by weight are 10~25 parts, preferably 10~20 parts, more preferably 14~16 parts.The present invention couple
The source of the sodium formate does not have special restriction, using commercial product well known to those skilled in the art.In the present invention
In, the sodium formate is a kind of pair of additive of the reinforcing bar without any erosion, is made with diethanol monoisopropanolamine, triethanolamine compatibility
With, play the role of mutually being catalyzed, accelerate Silicon in Cement acid tricalcium hydration rate, improve the early strength of cement, and will not
Decay later strength, can also greatly improve the performance of the resisting erosion of sulfate of cement, improves durability.
On the basis of the parts by weight of the diethanol monoisopropanolamine, no chlorine provided by the invention enhances collapse protection type cement
It is 0.5~2 part of organic phosphonate retarder that grinding aid, which includes parts by weight, preferably 0.5~1.5 part, more preferably 0.8~
1.2 part.Organic phosphonate retarder of the present invention includes 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, 1-hydroxy ethylidene-1,1-diphosphonic acid potassium and second two
One of four methene Alendronate of amine is a variety of.The present invention does not have special restriction to the source of organic phosphonate retarder, adopts
With commercial product well known to those skilled in the art.In the present invention, the organic phosphonate retarder and polymer point
Powder compatible use, it is good with the adaptability of concrete admixture, there is good function of slump protection；In actual use, cement early stage
3~5MPa is improved with later strength, it is all good with the adaptability of naphthalene system, aliphatic and polycarboxylic acids three classes water-reducing agent, and cement
It does not lose within paste flowing degree 2 hours；Compared with the common retarder such as sodium gluconate, white sugar and sodium tripolyphosphate, slow setting efficiency
3~5 times high, chemical stability and temperature tolerance are good, still there is good retarding effect at 250 DEG C；And can in cement slurry
Calcium ion forms complex compound, can be very good the concentration of the calcium ion in control liquid phase at aquation initial stage, and be adsorbed on well
On the embryos of hydrated product cenotype, the speed that hydrated product embryos generates in saturated solution is changed, thus is had preferable slow
Solidifying effect；When being used in combination with polymeric dispersant, ideal synergistic effect is shown, keeps the function of slump protection of cement slurry aobvious
It writes and improves.
On the basis of the parts by weight of the diethanol monoisopropanolamine, no chlorine provided by the invention enhances collapse protection type cement
Grinding aid includes the polymeric dispersant that parts by weight are 0.5~2 part, preferably 0.5~1.5 part, more preferably 0.8~1.2
Part.Polymeric dispersant of the present invention includes one of poly-epoxy succinic acid, polyepoxy sodium succinate and Sodium Polyacrylate
Or it is a variety of.The present invention does not have special restriction to the source of polymeric dispersant, using well known to those skilled in the art commercially available
Product.In the present invention, the polymeric dispersant and the compatible use of organic phosphonate retarder, with concrete admixture
Adaptability it is good, and have good function of slump protection；In actual use, cement early stage and later strength improve 3~5MPa, with
The adaptability of naphthalene system, aliphatic and polycarboxylic acids three classes water-reducing agent is all good, and flowing degree of net paste of cement 2 hours do not lose；Polymer
Dispersing agent can also reduce the surface energy of particle, improve the affinity with decentralized medium, effectively inhibit intergranular agglomeration,
Intergranular Interstitial Water is discharged, and then reduces cement normal consistency water consumption, improves cement performance；The mobility of particle is improved,
The property for improving cement slurry surface increases particle surface hydrated sheath thickness to increase its dispersion performance, keep slurry soft and
Mobility keeps preferable.When being used in combination with organic phosphonate retarder, ideal synergistic effect is shown, cement slurry is made
Function of slump protection significantly improve.
On the basis of the parts by weight of the diethanol monoisopropanolamine, no chlorine provided by the invention enhances collapse protection type cement
It is 2~4 parts of molasses that grinding aid, which includes parts by weight, preferably 2~3 parts.The present invention is to the source for having molasses without spy
Different restriction, using the common molasses of those skilled in the art.In the present invention, the molasses are a kind of sticky, dark brown
Color, the sugar industry byproduct for flowing shape in half, the polyhydroxy based component of the inside increase the lubricating action of hydration shell, and can drop
Self raising flour material particle surface energy, can be improved the flow velocity of material during material grinding, reduces fine grain reunion, plays grinding aid
Humidification；When cement granules and water contact, the hydrophilic film of like charges is formed, keeps cement granules mutually exclusive, and hinder
Hydrated cementitious, and then extend cement setting time, improve the function of slump protection of cement.
On the basis of the parts by weight of the diethanol monoisopropanolamine, no chlorine provided by the invention enhances collapse protection type cement
Grinding aid includes the water that parts by weight are surplus.The present invention does not have special restriction, art technology to the type of the water
Personnel select as needed, specific such as tap water.
In the present invention, the mass ratio of the organic phosphonate retarder and polymeric dispersant is preferably (1~2): 1, more
Preferably 1:1.
The present invention also provides the preparation method without chlorine enhanced cement grinding aid described in above-mentioned technical proposal, including it is following
Step:
1) raw material is weighed: diethanol monoisopropanolamine, triethanolamine, sodium formate, organic phosphonate retarder, polymer point
Powder, molasses, excess water；
2) agitator tank is added in the water of the step 1), stirring is slowly added to sodium formate, makes it completely dissolved, and continues
Stirring, obtains sodium formate solution；
3) into the sodium formate solution of the step 2), diethanol monoisopropanolamine, triethanolamine, organic phosphine are sequentially added
Hydrochlorate retarder, polymeric dispersant, stirring, obtain mixed liquor；
4) molasses are added in mixed liquor into the step 3), stir, obtains cement grinding aid.
Preferably, the step 3) mixing time is 2min.
Preferably, the step 4) mixing time is 5min.
No chlorine enhanced cement grinding aid provided by the invention and preparation method thereof is carried out below with reference to embodiment detailed
Explanation, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, 1 part of poly-epoxy succinic acid, 2 parts of molasses, 68 parts of water；.
Embodiment 2
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of 1-hydroxy ethylidene-1,1-diphosphonic acid potassium, 1 part of polyepoxy sodium succinate, 2 parts of molasses, 68 parts of water.
Embodiment 3
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of ethylene diamine tetra methylene phosphonic acid sodium, 1 part of Sodium Polyacrylate, 2 parts of molasses, 68 parts of water.
Embodiment 4
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 0.5 part of 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, 0.5 part of polyepoxy sodium succinate, 2 parts of molasses, 69 parts of water.
Embodiment 5
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, triethanolamine 8
Part, 15 parts of sodium formate, 1.5 parts of 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, 1.5 parts of Sodium Polyacrylate, 2 parts of molasses, 67 parts of water.
Embodiment 6
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 2 parts of 1-hydroxy ethylidene-1,1-diphosphonic acid potassium, 2 parts of poly-epoxy succinic acid, 2 parts of molasses, 66 parts of water.
Embodiment 7
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of 1-hydroxy ethylidene-1,1-diphosphonic acid potassium, 1 part of Sodium Polyacrylate, 2 parts of molasses, 68 parts of water.
Embodiment 8
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of ethylene diamine tetra methylene phosphonic acid sodium, 1 part of poly-epoxy succinic acid, 2 parts of molasses, 68 parts of water.
Embodiment 9
Cement grinding aid is prepared, constitutive material is by weight are as follows: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of ethylene diamine tetra methylene phosphonic acid sodium, 1 part of polyepoxy sodium succinate, 2 parts of molasses, 68 parts of water.
Comparative example 1
Prepare cement grinding aid, constitutive material by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 2 parts of molasses, 70 parts of water.
Comparative example 2
Prepare cement grinding aid, constitutive material by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, 2 parts of molasses, 69 parts of water.
Comparative example 3
Prepare cement grinding aid, constitutive material by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of poly-epoxy succinic acid, 2 parts of molasses, 69 parts of water.
Comparative example 4
Prepare cement grinding aid, constitutive material by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of sodium gluconate, 1 part of poly-epoxy succinic acid, 2 parts of molasses, 68 parts of water.
Comparative example 5
Prepare cement grinding aid, constitutive material by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine,
15 parts of sodium formate, 1 part of sodium tripolyphosphate, 1 part of poly-epoxy succinic acid, 2 parts of molasses, 68 parts of water.
Comparative example 6
The commercially available cement grinding aid haveing excellent performance
Same batch production PO.42.5 cement all raw material is taken, carries out small milling mill test according to actual production proportion,
And embodiment obtained above, comparative example grinding aid and commercially available cement grinding aid all press 0.1% weight percent addition, are made
Cement sample, according to national standards GB/T26748-2011 " cement grinding aid " measure grinding-aid effect；Take the water of above-mentioned preparation
Three kinds of mud sample product and on the market most common polycarboxylate water-reducer, aliphatic water reducing agent and naphthalene water reducer water-reducing agents carry out cement
With the compatibility test of water-reducing agent, wherein the addition content of water-reducing agent is all 2.0%, and according to GBT8077-2000, " concrete is additional
Agent homogenieity experimental method " method measure initial and 2 hours fluidities respectively, the result is shown in tables 1.
Table 1 is blank sample, the intensity of cement grinding aid made from Examples 1 to 9 and comparative example 1~6 and protects net slurry flowing
Spend result
Known by 1 result of table: the compression strength of embodiment 1-9 cement sample is obvious compared with the increase of blank and comparative example, shows
The grinding aid grinding-aid effect prepared in embodiment 1-9 is obvious, and the early strength and later strength to cement are all significantly increased；With
The initial flow degree of naphthalene system, aliphatic and polycarboxylic acids three classes water-reducing agent is obvious compared with the increase of blank and comparative example, and 2h is substantially not
Loss, or even have increase slightly, this shows that the grinding aid prepared in embodiment 1-9 significantly improves the function of slump protection of cement,
And it is fine with the adaptability of water-reducing agent.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of no chlorine enhances collapse protection type cement grinding aid, the component including following parts by weight:
2~8 parts of diethanol monoisopropanolamine
6~20 parts of triethanolamine
10~25 parts of sodium formate
0.5~2 part of organic phosphonate retarder
0.5~2 part of polymeric dispersant
2~4 parts of molasses
Excess water.
2. no chlorine according to claim 1 enhances collapse protection type cement grinding aid, which is characterized in that including following parts by weight
Component:
5 parts of diethanol monoisopropanolamine
8 parts of triethanolamine
15 parts of sodium formate
1 part of organic phosphonate retarder
1 part of polymeric dispersant
2 parts of molasses
68 parts of water.
3. no chlorine according to claim 1 or 2 enhances collapse protection type cement grinding aid, which is characterized in that the organic phospho acid
Salt retarder include one of 1-hydroxy ethylidene-1,1-diphosphonic acid disodium, 1-hydroxy ethylidene-1,1-diphosphonic acid potassium and ethylene diamine tetra methylene phosphonic acid sodium or
It is a variety of.
4. no chlorine according to claim 1 or 2 enhances collapse protection type cement grinding aid, which is characterized in that the polymer point
Powder includes one of poly-epoxy succinic acid, polyepoxy sodium succinate and Sodium Polyacrylate or a variety of.
5. no chlorine according to claim 1 enhances collapse protection type cement grinding aid, which is characterized in that the organic phosphonate is slow
The mass ratio of solidifying agent and polymeric dispersant is (1~2): 1.
6. the preparation method of any one of Claims 1 to 5 no chlorine enhancing collapse protection type cement grinding aid, comprising the following steps:
1) raw material is weighed: diethanol monoisopropanolamine, triethanolamine, sodium formate, organic phosphonate retarder, polymer dispersion
Agent, molasses, excess water；
2) agitator tank is added in the water of the step 1), stirring is slowly added to sodium formate, makes it completely dissolved, continues to stir, obtain
To sodium formate solution；
3) into the sodium formate solution of the step 2), diethanol monoisopropanolamine, triethanolamine, organic phosphonate are sequentially added
Retarder, polymeric dispersant, stirring, obtain mixed liquor；
4) molasses are added in mixed liquor into the step 3), stir, obtains cement grinding aid.
7. preparation method according to claim 6, which is characterized in that the step 3) mixing time is 2min.
8. preparation method according to claim 6, which is characterized in that the step 4) mixing time is 5min.
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| CN111689715A (en) * | 2020-05-26 | 2020-09-22 | 贵州石博士科技有限公司 | Yield-increasing reinforced cement grinding aid and preparation method thereof |
| CN112047658A (en) * | 2020-09-14 | 2020-12-08 | 株洲宏信科技发展有限公司 | Cement grinding aid, preparation method thereof and application thereof in interior decoration cement |
| CN112919844A (en) * | 2021-02-09 | 2021-06-08 | 华润水泥技术研发（广西）有限公司 | Grinding aid for improving adaptability of high-alumina clinker cement admixture |
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| CN114804704A (en) * | 2022-03-24 | 2022-07-29 | 雷耐功能材料(浙江)有限公司 | Environment-friendly chlorine-free cement grinding aid and production method thereof |
| CN115557765A (en) * | 2022-09-19 | 2023-01-03 | 江苏中建商品混凝土有限公司 | Limestone powder composite admixture and preparation method and application thereof |
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