CN110903435A - Concrete glue reducing agent and preparation method thereof - Google Patents
Concrete glue reducing agent and preparation method thereof Download PDFInfo
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- CN110903435A CN110903435A CN201911181783.7A CN201911181783A CN110903435A CN 110903435 A CN110903435 A CN 110903435A CN 201911181783 A CN201911181783 A CN 201911181783A CN 110903435 A CN110903435 A CN 110903435A
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- concrete
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- 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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
-
- 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
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
- C08F8/32—Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
-
- 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
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
Abstract
The application relates to the field of concrete admixtures, in particular to a concrete glue reducing agent and a preparation method thereof. The concrete gel reducer takes a common water reducer in the market as a matrix, takes organic amine and organic alcohol as side reactants, and forms a high molecular structure with a certain steric hindrance effect under the action of unsaturated organic acid and carbohydrate compounds, so that cement components in concrete are effectively dispersed, the utilization efficiency of the cement is improved, the strength of the concrete is improved, and/or the production cost of the concrete is reduced by reducing the using amount of the cement.
Description
Technical Field
The application relates to the field of concrete admixtures, in particular to a concrete glue reducing agent and a preparation method thereof.
Background
The concrete uses cement as main gel material, and then adds in water, sand and stone, and special concrete additive, and through fully stirring, the cement is hydrated to form an integral structure with a certain strength. Concrete is widely applied to various construction projects as a building base material, and the demand for the concrete is continuously increased along with the continuous development of infrastructure.
After the concrete is fully stirred, the dispersion state of the cement in the concrete has great influence on the performance of the concrete, the better the cement is dispersed in the concrete, the higher the strength of the concrete is, namely, the better the cement is dispersed in the concrete under the condition of ensuring the strength of the concrete, the more the cement is dispersed in the concrete, and the consumption of the cement and/or other fillers can be greatly reduced, so that the production cost of the concrete is reduced. However, in practical situations, about 20-30% of cement in concrete is not fully dispersed and hydrated, and the cement basically only serves as a filler and does not play a role in enhancing the strength of concrete. Therefore, there is a need for a concrete admixture that can improve the dispersion of cement in concrete and improve the hydration efficiency of cement, thereby improving the strength of concrete and/or reducing the production cost of concrete without reducing other properties of concrete.
Disclosure of Invention
The application provides a preparation method of a concrete gel reducing agent, which comprises the following steps:
1) adding water into a container, starting stirring, and adding 7-9 parts of a water reducing agent;
2) adding 3-5 parts of organic amine and 2-4 parts of organic alcohol, and reacting for 10-30 minutes;
3) adding 0.05-0.1 part of unsaturated organic acid, and reacting for 20-40 minutes;
4) and adding 0.03-0.06 part of carbohydrate, and reacting for 10-30 minutes to obtain the concrete gel reducer, wherein the carbohydrate is disaccharide.
Optionally, in the step 2), the reaction time is 20 minutes, in the step 3), the reaction time is 30 minutes, and in the step 4), the reaction time is 20 minutes.
Optionally, the water reducing agent is a polycarboxylic acid water reducing agent.
Optionally, the organic amine is a mixture of diethanolamine and triethanolamine, and the mixture comprises the following components in parts by weight: diethanolamine: triethanolamine is 1-3: 1.
Optionally, in the mixture, the weight ratio of each component is as follows: diethanolamine: triethanolamine is 2: 1.
Optionally, the organic alcohol is diethylene glycol.
Optionally, the unsaturated organic acid is acrylic acid.
Optionally, the disaccharide is maltose.
In addition, the application also provides a concrete gel reducing agent, and the concrete gel reducing agent is prepared by adopting the preparation method of the concrete gel reducing agent with any technical characteristic.
The application concrete subtracts glue agent for using the water-reducing agent as the base member to organic amine and organic alcohol form the macromolecular structure who possesses certain steric hindrance effect for the side reaction thing under the effect of other reactants, thereby the cement component in the effectual dispersion concrete has improved the utilization efficiency of cement, and then the intensity that promotes the concrete and/or the manufacturing cost of concrete is reduced through the quantity that reduces cement.
Detailed Description
The present solution is explained below with reference to specific embodiments.
The preparation method of the concrete gel reducing agent comprises the following steps:
1) adding 81-87 parts of water into a container, starting stirring, adding 7-9 parts of a water reducing agent, and uniformly stirring, wherein the water reducing agent is preferably a polycarboxylic acid water reducing agent;
2) adding 3-5 parts of organic amine and 2-4 parts of organic alcohol, and reacting for 10-30 minutes, wherein the preferable organic alcohol is diethylene glycol, the preferable organic amine is a mixture of diethanolamine and triethanolamine, the weight ratio of the diethanolamine to the triethanolamine in the mixture is 1-3: 1, the more preferable mixture is that the weight ratio of the diethanolamine to the triethanolamine in the mixture is 2:1, and the preferable reaction time is 20 minutes;
3) adding 0.05-0.1 part of unsaturated organic acid, and reacting for 20-40 minutes, wherein the unsaturated organic acid is preferably acrylic acid, and the reaction time is preferably 30 minutes;
4) and adding 0.03-0.06 part of carbohydrate, and reacting for 10-30 minutes to obtain the concrete gel reducer, wherein the carbohydrate is preferably disaccharide, more preferably the disaccharide is maltose, and the reaction time is preferably 20 minutes.
It should be noted that the water reducing agent, the organic amine, the organic alcohol, the unsaturated organic acid and the saccharide compound are all common materials which can be purchased directly on the market or obtained by mixing common materials which can be purchased on the market, and in addition, the components are calculated by weight parts.
The application also provides a concrete gel reducing agent, and the concrete gel reducing agent is prepared by adopting the preparation method of the concrete gel reducing agent.
This application uses the water-reducing agent as the main part, in above-mentioned reaction process, make the macromolecular structure who possesses certain steric hindrance effect, polycarboxylate water-reducing agent's the quantity is the biggest in the existing market, and polycarboxylate water-reducing agent is structural easily to form the macromolecular structure who possesses great steric hindrance effect, therefore this application is preferred to be adopted polycarboxylate water-reducing agent as the main part, use organic amine and organic alcohol as the side reaction thing, under carbohydrate and unsaturated organic acid's effect, form long branch chain macromolecular compound, this macromolecular compound possesses great steric hindrance effect, can effectively prevent that cement from agglomerating in the concrete, increase the dispersion degree of cement at the concrete, promote the utilization ratio of cement, thereby promote the performance of concrete and/or reduce the manufacturing cost of concrete through the quantity that reduces cement.
The practical application effect of the concrete gel reducer is illustrated by the following examples.
Example 1
The preparation method of the concrete gel reducing agent comprises the following steps:
1) adding 84 parts of water into a container, starting stirring, and adding 8 parts of a water reducing agent;
2) adding 4 parts of organic amine and 3 parts of organic alcohol, and reacting for 20 minutes;
3) adding 0.075 part of unsaturated organic acid, and reacting for 30 minutes;
4) and adding 0.045 part of carbohydrate, and reacting for 20 minutes to obtain the concrete gel reducer.
It is noted that the above components are all calculated by weight parts.
The concrete glue reducing agent is prepared through the steps. Wherein the water reducing agent is a conventional polycarboxylic acid water reducing agent; the organic amine is a mixture of diethanolamine and triethanolamine, and the weight ratio of the diethanolamine to the triethanolamine in the mixture is 2: 1; the organic alcohol is diethylene glycol; the unsaturated organic acid is acrylic acid; the saccharide compound is maltose; the water used in the preparation method can adopt the common qualified tap water in the market.
In order to verify the performance of the concrete gel reducing agent in example 1, a performance test experiment is designed, and specifically, the cement used in the application is the common commercially available cement with the model of P.O42.5R, and the dosage of the cement is 220kg/m3Specifically, the concrete designed by the experiment comprises the following components:
the concrete gel reducing agent is the concrete gel reducing agent described in the embodiment 1. The mineral powder, the fly ash and the stones are all in common conventional arrangement, and the conventional arrangement meets the common performance requirements of the concrete. It should be noted that, although the present application does not limit the above-mentioned mineral powder, fly ash and stones, the types and product qualities of the mineral powder, fly ash and stones are the same between the test experiments of the subsequent examples, and the application performance of the concrete gel reducer described in the present application is verified based on the types and product qualities of the mineral powder, fly ash and stones. In addition, in order to simulate the actual using effect, other indispensable additives are added into the concrete in the test experiment of the application, but other gel reducers are not included, the types, models and mixing amounts of the additives are common settings in the concrete production process, and the types, models and mixing amounts of the other additives are the same among the test experiments of each embodiment.
In order to compare the actual performance of the concrete gel reducing agent, three control groups are provided, including a control group 1, a control group 2 and a control group 3, wherein the control group 1 is different from the embodiment 1 in that the control group 1 does not use any concrete gel reducing agent, and the other settings are the same as the embodiment 1; the control group 2 is different from the example 1 in that the control group 2 does not use any concrete gel reducing agent and the dosage of the cement is reduced by 20kg/m3As a supplement, the amount of fly ash is increased by 20kg/m3(ii) a The control 3 is different from the example 1 in that the amount of cement used in the control 3 is reduced by 20kg/m3As a supplement, the amount of fly ash is increased by 20kg/m3. The specific components of each control group are shown in the following table:
the concrete reducer used in the control group 3 is the concrete reducer described in example 1.
The final test results are given in the following table:
according to the embodiment 1 and the comparison group 1, under the condition that the component proportion is not changed, the concrete gel reducer of the embodiment 1 is added into the concrete, so that the initial slump/expansion of the concrete and the 1h slump/expansion of the concrete can be obviously improved, and the strength of the concrete is improved; according to the embodiment 1, the comparison group 2 and the comparison group 3, under the condition that the using amount of cement is reduced and the same using amount of fly ash is supplemented, the concrete gel reducing agent disclosed by the embodiment 1 can obviously reduce the strength loss of concrete caused by the reduction of the using amount of the cement and improve the initial slump/expansion of the concrete for 1 h.
Through the experiment, the concrete glue reducing agent in the embodiment 1 obviously enhances the concrete strength and improves the fluidity and slump retention.
Example 2
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the preparation method of the concrete gel reducer is different in that the using amount of the water reducer is changed to 7 parts, and the types and the weight parts of the rest raw materials and the reaction process are set to be the same.
Example 3
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the difference is that the amount of the water reducer is changed to 9 parts, and the types and the weight parts of the rest raw materials and the reaction process are all set to be the same.
Example 4
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the difference is that the use amount of organic amine is changed to 3 parts, and the rest raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 5
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the difference is that the use amount of organic amine is changed to 5 parts, and the rest raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 6
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the preparation method of the concrete gel reducer is different in that the use amount of the organic alcohol is changed to 2 parts, and the rest raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 7
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the preparation method of the concrete gel reducer is different in that the use amount of the organic alcohol is changed to 4 parts, and the rest of the raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 8
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the difference is only that the use amount of the unsaturated organic acid is changed to 0.05 part, and the rest of the raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 9
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the difference is that the use amount of the unsaturated organic acid is changed to 0.1 part, and the rest of the raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 10
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the preparation method of the concrete gel reducer is different only in that the use amount of the carbohydrate is changed to 0.03 part, and the rest of the raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 11
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the difference is only that the use amount of the carbohydrate is changed to 0.06 part, and the rest of the raw materials such as the types and the parts by weight are set to be the same as the reaction process.
Example 12
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the preparation method of the concrete gel reducer is different in that the mass ratio of diethanolamine to triethanolamine in the organic amine is 1:1, and the rest of the raw materials such as types, weight parts and the reaction process are set in the same way.
Example 13
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the preparation method of the concrete gel reducer is different in that in the organic amine, the mass ratio of diethanolamine to triethanolamine is 3:1, and the rest of the raw materials such as types, weight parts and the reaction process are set in the same way.
In addition, a performance test experiment is also set for the above embodiment, specifically, the concrete gel reducing agent described in the above embodiment is respectively added into the concrete with the same component ratio as that described in the above control group 2, and the test performance is shown in the following table:
according to the table, the concrete gel reducing agent obtained by the preparation method of the concrete gel reducing agent in the setting that the step 2) is carried out for 20 minutes, the step 3) is carried out for 30 minutes and the step 4) is carried out for 20 minutes can effectively improve the strength of concrete, and the strength loss of the concrete can be reduced under the condition that the cement consumption in the concrete is reduced and the concrete is replaced by fly ash. As those skilled in the art can foresee, the concrete gel reducing agent composed of other components obtained by the preparation method of the concrete gel reducing agent disclosed in the present application under the setting of reacting for 20 minutes in step 2), reacting for 30 minutes in step 3) and reacting for 20 minutes in step 4) can also achieve the effects of increasing the strength of concrete and/or reducing the cost of concrete.
Example 14
Compared with the preparation method of the concrete gel reducing agent in the embodiment 1, the difference of the preparation method is that the reaction time of the step 2) is changed into 10 minutes, and the rest of the raw materials such as the types, the weight parts and the reaction process are set to be the same.
Example 15
Compared with the preparation method of the concrete gel reducer in the embodiment 1, the preparation method of the concrete gel reducer is different in that the reaction time of the step 2) is changed into 30 minutes, and the rest of the raw materials such as types, parts by weight and the reaction process are set to be the same.
Example 16
Compared with the preparation method of the concrete gel reducing agent in the embodiment 1, the difference of the preparation method is that the reaction time in the step 3) is changed into 20 minutes, and the rest of the raw materials such as the types, the weight parts and the reaction process are set to be the same.
Example 17
Compared with the preparation method of the concrete gel reducing agent in the embodiment 1, the difference of the preparation method is that the reaction time in the step 3) is changed to 40 minutes, and the rest of the raw materials such as the types, the weight parts and the reaction process are set to be the same.
Example 18
Compared with the preparation method of the concrete gel reducing agent in the embodiment 1, the preparation method of the concrete gel reducing agent is different in that the reaction time of the step 4) is changed into 10 minutes, and the rest of the raw materials such as types, parts by weight and the reaction process are set to be the same.
Example 19
Compared with the preparation method of the concrete gel reducing agent in the embodiment 1, the preparation method of the concrete gel reducing agent is different in that the reaction time of the step 4) is changed into 30 minutes, and the rest of the raw materials such as types, parts by weight and the reaction process are set to be the same.
Similarly, the above embodiment is further provided with a performance test experiment, specifically, the concrete gel reducing agent described in the above embodiment is added to the concrete with the same component ratio as that described in the above control group 2, and the test performance is shown in the following table:
according to the table, the preparation method of the concrete gel reducer has the advantages that the using amount of the water reducer is 8 parts; the dosage of the organic amine is 4 parts, the organic amine consists of diethanolamine and triethanolamine, and the weight ratio of the diethanolamine to the triethanolamine is: triethanolamine is 2: 1; the using amount of the organic alcohol is 3 parts; the concrete glue reducing agent obtained under the arrangement that the using amount of the unsaturated organic acid is 0.075 part and the using amount of the carbohydrate is 0.045 part can effectively improve the strength of the concrete, and the strength loss of the concrete can be reduced under the condition that the using amount of cement in the concrete is reduced and the cement is replaced by fly ash. As can be foreseen by those skilled in the art, the preparation method of the concrete gel reducer disclosed by the application comprises the steps of using 8 parts of water reducer; the dosage of the organic amine is 4 parts, the organic amine consists of diethanolamine and triethanolamine, and the weight ratio of the diethanolamine to the triethanolamine is: triethanolamine is 2: 1; the using amount of the organic alcohol is 3 parts; with the settings of 0.075 part of unsaturated organic acid and 0.045 part of carbohydrate, the concrete gel reducer prepared by adopting the reaction time except the reaction time used in the above embodiment can also achieve the effects of enhancing the concrete strength and/or reducing the manufacturing cost of the concrete.
From the experimental results of the above examples, those skilled in the art can expect that the concrete gel reducing agent prepared by the preparation method of the concrete gel reducing agent described in the present application can produce the effects of increasing the strength of concrete and/or reducing the cost of concrete. It should be noted that the amount of water used in the preparation method of the concrete gel reducer described in the present application has no influence on the concrete gel reducer described in the present application, but should be sufficient to dissolve all the reactants and ensure the reaction to proceed smoothly.
The concrete gel reducing agent inevitably comprises impurities, and the content of the impurities is very small and is not considered to be limited by the application.
The same and similar parts among the various embodiments in the specification of the present application may be referred to each other.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the feasibility of the technical solutions of the present application, and those skilled in the art should understand that those skilled in the art can make changes, modifications, additions or substitutions within the spirit and scope of the present application without departing from the spirit and scope of the present application, and shall fall within the protection scope of the claims of the present application.
Claims (9)
1. The preparation method of the concrete gel reducing agent is characterized by comprising the following steps:
1) adding water into a container, starting stirring, and adding 7-9 parts of a water reducing agent;
2) adding 3-5 parts of organic amine and 2-4 parts of organic alcohol, and reacting for 10-30 minutes;
3) adding 0.05-0.1 part of unsaturated organic acid, and reacting for 20-40 minutes;
4) and adding 0.03-0.06 part of carbohydrate, and reacting for 10-30 minutes to obtain the concrete gel reducer, wherein the carbohydrate is disaccharide.
2. The method for preparing the concrete gel reducing agent according to claim 1, wherein the reaction time in the step 2) is 20 minutes, the reaction time in the step 3) is 30 minutes, and the reaction time in the step 4) is 20 minutes.
3. The method for preparing the concrete size reducer according to claim 1, wherein the water reducer is a polycarboxylic acid water reducer.
4. The preparation method of the concrete gel reducer according to claim 1, wherein the organic amine is a mixture of diethanolamine and triethanolamine, and the weight ratio of the components in the mixture is as follows: diethanolamine: triethanolamine is 1-3: 1.
5. The preparation method of the concrete gel reducing agent as claimed in claim 4, wherein the weight ratio of each component in the mixture is as follows: diethanolamine: triethanolamine is 2: 1.
6. The method of preparing a concrete size reducer according to claim 1, wherein the organic alcohol is diethylene glycol.
7. The method of preparing a concrete size reducer according to claim 1, wherein the unsaturated organic acid is acrylic acid.
8. The method for preparing a concrete size reducer according to claim 1, wherein the disaccharide is maltose.
9. A concrete gel reducing agent, which is characterized by being prepared by the preparation method of the concrete gel reducing agent according to any one of claims 1 to 8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892678A (en) * | 2020-07-30 | 2020-11-06 | 浙江鑫美博新材料有限公司 | Ketene concrete glue reducing agent and preparation method thereof |
| CN115353588A (en) * | 2022-09-20 | 2022-11-18 | 信丰华轩建材有限公司 | Concrete glue reducing agent and preparation method thereof |
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| US20090298973A1 (en) * | 2006-08-01 | 2009-12-03 | Denki Kagaku Kogyo Kabushiki Kaisha | Cement Admixture and Cement Composition Using Thereof |
| CN105293983A (en) * | 2015-11-06 | 2016-02-03 | 湖北工业大学 | High-adaptability glue reducing agent for concrete |
| CN105906230A (en) * | 2016-04-21 | 2016-08-31 | 武汉金磊珂建材科技有限公司 | High-performance multifunctional cement reducing agent for concrete and preparation method for same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090298973A1 (en) * | 2006-08-01 | 2009-12-03 | Denki Kagaku Kogyo Kabushiki Kaisha | Cement Admixture and Cement Composition Using Thereof |
| CN105293983A (en) * | 2015-11-06 | 2016-02-03 | 湖北工业大学 | High-adaptability glue reducing agent for concrete |
| CN105906230A (en) * | 2016-04-21 | 2016-08-31 | 武汉金磊珂建材科技有限公司 | High-performance multifunctional cement reducing agent for concrete and preparation method for same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111892678A (en) * | 2020-07-30 | 2020-11-06 | 浙江鑫美博新材料有限公司 | Ketene concrete glue reducing agent and preparation method thereof |
| CN115353588A (en) * | 2022-09-20 | 2022-11-18 | 信丰华轩建材有限公司 | Concrete glue reducing agent and preparation method thereof |
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