CN113087844A - Polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete and preparation method thereof - Google Patents
Polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete and preparation method thereof Download PDFInfo
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- CN113087844A CN113087844A CN202110209043.0A CN202110209043A CN113087844A CN 113087844 A CN113087844 A CN 113087844A CN 202110209043 A CN202110209043 A CN 202110209043A CN 113087844 A CN113087844 A CN 113087844A
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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
- C08F228/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur
- C08F228/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur by a bond to sulfur
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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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
- C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
- C04B2103/465—Water-sorbing agents, hygroscopic or hydrophilic agents
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete and a preparation method thereof, wherein the polycarboxylic acid water-retaining agent comprises 5-10 parts of sodium propenyl sulfonate, 5-10 parts of acrylamide, 0.3-0.5 part of hydrogen peroxide, acrylamide, hydrogen peroxide, acrylic acid, mercaptopropionic acid, VC and deionized water. According to the invention, the molecular structure and molecular weight of a target product are set by adjusting the polymerization process according to the characteristic of predesigned molecular structure during the polymerization of the polycarboxylic acid polymer, so that the polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete is obtained, the structure is more stable, the problems of pump blockage caused by segregation and bleeding during the pumping process of concrete and excessive concrete slump loss caused by water reduction and pumping are well solved, a certain dispersion effect is achieved on cement particles, and the polycarboxylic acid water-retaining agent can play a water-retaining effect on free water released during the hydration process of cement.
Description
Technical Field
The invention relates to the technical field of water-retaining agents, in particular to a polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete and a preparation method thereof.
Background
Concrete is widely applied to engineering construction, sand is one of main raw materials in the concrete, is used as natural sand resource which is exhausted day by day for protecting natural sand resource from being excessively exploited and exploited to influence ecology and river flood bank, shipping and bridge use safety, the natural sand resource is increasingly tense and is gradually replaced by machine-made sand, the proportion of the machine-made sand is up to 76 percent, the increasing shortage of the natural sand makes the machine-made sand gradually become the focus of people for researching and preparing concrete, the machine-made sand is different from the natural sand in the aspects of physical properties such as particle shape characteristic, grading, stone powder content and the like, and the machine-made sand is ready-mixed with mortar at present, the concrete and the building blocks are widely applied, the adaptability of the concrete admixture and machine-made sand grains, different grain surface roughness degrees and different stone powder contents in different production places is greatly different, and meanwhile, a water retaining agent is required to be used for water retention in the concrete application process.
Machine-made sand on the current market is widely applied to ready-mixed mortar, concrete and building blocks, machine-made sand grains in different production places, different grain surface roughness and different stone powder contents and adaptability of concrete admixtures are also greatly different, particularly, the content of soil and stone powder in the sand has larger influence factors on the concrete, and the traditional water-retaining agent cannot effectively improve the conditions of easy segregation and bleeding of the concrete caused by the dirty raw materials of machine-made sand or concrete when in use.
Disclosure of Invention
The invention provides a polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete and a preparation method thereof, aiming at the defects in the background technology.
The invention adopts the following technical scheme that the polycarboxylic acid water retention agent for wet-mixed mortar and concrete comprises 5-10 parts of sodium propenyl sulfonate, 5-10 parts of acrylamide, 0.3-0.5 part of hydrogen peroxide, 10 parts of acrylic acid, 0.1-0.5 part of mercaptopropionic acid and 0.1-0.2 part of VC, wherein the ratio of sodium propenyl sulfonate is set to be 5-10 parts, the ratio of acrylamide is set to be 5-10 parts, the ratio of acrylic acid is set to be 10 parts.
A further preferred embodiment of the present invention includes sodium propenyl sulfonate, acrylamide, hydrogen peroxide, acrylic acid, mercaptopropionic acid, VC, and deionized water, wherein the ratio of sodium propenyl sulfonate is 10 parts, the ratio of acrylamide is 10 parts, the ratio of hydrogen peroxide is 0.5 parts, the ratio of acrylic acid is 10 parts, the ratio of mercaptopropionic acid is 0.5 parts, and the ratio of VC is 0.2 parts.
The water treatment agent comprises sodium propenyl sulfonate, acrylamide, hydrogen peroxide, acrylic acid, mercaptopropionic acid, VC and deionized water, wherein the proportion of the sodium propenyl sulfonate is 5 parts, the proportion of the acrylamide is 5 parts, the proportion of the hydrogen peroxide is 0.3 part, the proportion of the acrylic acid is 10 parts, the proportion of the mercaptopropionic acid is 0.2 part, and the proportion of the VC is 0.1 part.
The manufacturing method comprises the following steps:
s1, preparing materials: firstly, taking out a three-neck flask with a stirring thermometer, then taking out all raw materials required to be used, and weighing for later use according to a fixed weight;
s2, stirring and mixing: firstly, adding a certain amount of deionized water into a three-neck flask, then stirring by using a stirring rod, then adding a certain amount of sodium propenyl sulfonate and acrylamide, stirring until the mixture is preliminarily mixed, then adding a certain amount of hydrogen peroxide, stirring again, simultaneously dropwise adding a good solution diluted by acrylic acid and the same amount of deionized water at a constant speed, and then dropwise adding mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC;
s3, standing: and (3) placing the preliminarily processed liquid raw materials in a sealed environment for heat preservation, and then adjusting the pH value to 8-9 by using liquid caustic soda sodium hydroxide to obtain the light yellow transparent polycarboxylic acid water-retaining agent.
As a further preferable mode of the present invention, in step S2, a certain amount of deionized water is first added into a three-neck flask, then a stirring rod is used for stirring, then a certain amount of sodium propenyl sulfonate and acrylamide are added, and stirring is performed until preliminary mixing is achieved, then a certain amount of hydrogen peroxide is added, stirring is performed again, meanwhile, stirring time is set to 30min, at the same time, a good solution diluted by acrylic acid and the same amount of deionized water is dropwise added within 30min at a constant speed, and then mercaptopropionic acid, the same amount of deionized water solution, and a certain amount of reducing agent VC are dropwise added.
As a further preferable mode of the invention, in step S3, the liquid raw material which is processed primarily is placed in a sealed environment with the temperature of 25 ℃ for heat preservation, the heat preservation time is set to be 1h, and then liquid caustic soda sodium hydroxide is used for adjusting the pH value to be 8-9, so that the light yellow transparent polycarboxylic acid water-retaining agent can be prepared.
According to the invention, the polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete is obtained by adjusting the molecular structure and molecular weight of a target product set by a polymerization process according to the characteristics of a pre-designed molecular structure during polymerization of a polycarboxylic acid polymer, so that the structure is more stable, the problems of pump blockage caused by segregation and bleeding in the concrete pumping process and excessive concrete slump loss caused by water reduction and pumping are well solved, a certain dispersion effect is achieved on cement particles, a water retaining effect can be achieved on free water released in the cement hydration process, the segregation and bleeding phenomena in the concrete construction process are reduced, the pump blockage and the pumping slump loss of concrete during pumping can be effectively reduced, the concrete compactness is better, and the concrete strength and durability can be effectively improved.
Drawings
FIG. 1 is a diagram showing the structure of the reaction equation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete and a preparation method thereof are disclosed, wherein the polycarboxylic acid water-retaining agent comprises 5-10 parts of sodium propenyl sulfonate, 5-10 parts of acrylamide, 0.3-0.5 part of hydrogen peroxide, 10 parts of acrylic acid, 0.1-0.5 part of mercaptopropionic acid and 0.1-0.2 part of VC, and the proportion of sodium propenyl sulfonate, acrylamide, acrylic acid, mercaptopropionic acid and deionized water is adopted.
The manufacturing method comprises the following steps:
s1, preparing materials: firstly, taking out a three-neck flask with a stirring thermometer, then taking out all raw materials required to be used, and weighing for later use according to a fixed weight;
s2, stirring and mixing: firstly, adding a certain amount of deionized water into a three-neck flask, then stirring by using a stirring rod, then adding a certain amount of sodium propenyl sulfonate and acrylamide, stirring until the mixture is preliminarily mixed, then adding a certain amount of hydrogen peroxide, stirring again, simultaneously dropwise adding a good solution diluted by acrylic acid and the same amount of deionized water at a constant speed, and then dropwise adding mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC;
s3, standing: and (3) placing the preliminarily processed liquid raw materials in a sealed environment for heat preservation, and then adjusting the pH value to 8-9 by using liquid caustic soda sodium hydroxide to obtain the light yellow transparent polycarboxylic acid water-retaining agent.
In step S2, a certain amount of deionized water is added into a three-neck flask, then a stirring rod is used for stirring, then a certain amount of sodium propenyl sulfonate and acrylamide are added and stirred until preliminary mixing is achieved, then a certain amount of hydrogen peroxide is added and stirring is carried out again, the stirring time is set to 30min, meanwhile, a good solution diluted by acrylic acid and the same amount of deionized water is dropwise added within 30min at a constant speed, and then mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC are dropwise added.
In step S3, the liquid raw materials processed primarily are placed in a sealed environment with the temperature of 25 ℃ for heat preservation, the heat preservation time is set to 1h, and then liquid caustic soda sodium hydroxide is used for adjusting the pH value to 8-9, so that the light yellow transparent polycarboxylic acid water-retaining agent can be prepared.
Example one
The invention provides a technical scheme that: a polycarboxylic acid water retention agent for wet-mixed mortar and concrete and a preparation method thereof are disclosed, wherein the polycarboxylic acid water retention agent comprises sodium propenyl sulfonate, acrylamide, hydrogen peroxide, acrylic acid, mercaptopropionic acid, VC and deionized water, the proportion of the sodium propenyl sulfonate is set to 10 parts, the proportion of the acrylamide is set to 10 parts, the proportion of the hydrogen peroxide is set to 0.5 part, the proportion of the acrylic acid is set to 10 parts, the proportion of the mercaptopropionic acid is set to 0.5 part, and the proportion of the VC is set to 0.2 part.
The manufacturing method comprises the following steps:
s1, preparing materials: firstly, taking out a three-neck flask with a stirring thermometer, then taking out all raw materials required to be used, and weighing for later use according to a fixed weight;
s2, stirring and mixing: firstly, adding a certain amount of deionized water into a three-neck flask, then stirring by using a stirring rod, then adding a certain amount of sodium propenyl sulfonate and acrylamide, stirring until the mixture is preliminarily mixed, then adding a certain amount of hydrogen peroxide, stirring again, simultaneously dropwise adding a good solution diluted by acrylic acid and the same amount of deionized water at a constant speed, and then dropwise adding mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC;
s3, standing: and (3) placing the preliminarily processed liquid raw materials in a sealed environment for heat preservation, and then adjusting the pH value to 8-9 by using liquid caustic soda sodium hydroxide to obtain the light yellow transparent polycarboxylic acid water-retaining agent.
In step S2, a certain amount of deionized water is added into a three-neck flask, then a stirring rod is used for stirring, then a certain amount of sodium propenyl sulfonate and acrylamide are added and stirred until preliminary mixing is achieved, then a certain amount of hydrogen peroxide is added and stirring is carried out again, the stirring time is set to 30min, meanwhile, a good solution diluted by acrylic acid and the same amount of deionized water is dropwise added within 30min at a constant speed, and then mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC are dropwise added.
In step S3, the liquid raw materials processed primarily are placed in a sealed environment with the temperature of 25 ℃ for heat preservation, the heat preservation time is set to 1h, and then liquid caustic soda sodium hydroxide is used for adjusting the pH value to 8-9, so that the light yellow transparent polycarboxylic acid water-retaining agent can be prepared.
Example two
The invention provides a technical scheme that: a polycarboxylic acid water retention agent for wet-mixed mortar and concrete and a preparation method thereof are disclosed, wherein the polycarboxylic acid water retention agent comprises 5 parts of sodium propenyl sulfonate, 5 parts of acrylamide, 0.3 part of hydrogen peroxide, 10 parts of acrylic acid, 0.2 part of mercaptopropionic acid and 0.1 part of VC, and the proportion of the sodium propenyl sulfonate, the acrylamide, the hydrogen peroxide, the acrylic acid, the mercaptopropionic acid and the deionized water are respectively adopted.
The manufacturing method comprises the following steps:
s1, preparing materials: firstly, taking out a three-neck flask with a stirring thermometer, then taking out all raw materials required to be used, and weighing for later use according to a fixed weight;
s2, stirring and mixing: firstly, adding a certain amount of deionized water into a three-neck flask, then stirring by using a stirring rod, then adding a certain amount of sodium propenyl sulfonate and acrylamide, stirring until the mixture is preliminarily mixed, then adding a certain amount of hydrogen peroxide, stirring again, simultaneously dropwise adding a good solution diluted by acrylic acid and the same amount of deionized water at a constant speed, and then dropwise adding mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC;
s3, standing: and (3) placing the preliminarily processed liquid raw materials in a sealed environment for heat preservation, and then adjusting the pH value to 8-9 by using liquid caustic soda sodium hydroxide to obtain the light yellow transparent polycarboxylic acid water-retaining agent.
In step S2, a certain amount of deionized water is added into a three-neck flask, then a stirring rod is used for stirring, then a certain amount of sodium propenyl sulfonate and acrylamide are added and stirred until preliminary mixing is achieved, then a certain amount of hydrogen peroxide is added and stirring is carried out again, the stirring time is set to 30min, meanwhile, a good solution diluted by acrylic acid and the same amount of deionized water is dropwise added within 30min at a constant speed, and then mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC are dropwise added.
In step S3, the liquid raw materials processed primarily are placed in a sealed environment with the temperature of 25 ℃ for heat preservation, the heat preservation time is set to 1h, and then liquid caustic soda sodium hydroxide is used for adjusting the pH value to 8-9, so that the light yellow transparent polycarboxylic acid water-retaining agent can be prepared.
The water retention agent parameter table of the invention is as follows:
influence of water-retaining agent on concrete bleeding rate
In conclusion, according to the characteristics of the pre-designed molecular structure during the polymerization of the polycarboxylic acid polymer, the invention adjusts the molecular structure and molecular weight of a polymerization process set target product to obtain the polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete, so that the structure is more stable, the problems of pump blockage caused by segregation and bleeding in the concrete pumping process and excessive concrete slump loss caused by water reduction and pumping are better solved, a certain dispersion effect is achieved on cement particles, a water retaining effect can be achieved on free water released in the cement hydration process, the segregation and bleeding phenomena in the concrete construction process are reduced, the loss of pump blockage and slump loss caused by pumping in the concrete pumping process can be effectively reduced, the concrete compactness is better, and the concrete strength and durability can be effectively improved; compared with the traditional cellulose ether, gelatine powder and starch decomposition product water retention agent in use, the water retention agent is made into a functional polymer material with extremely strong water retention capacity by virtue of the unique functionality in concrete, the molecular structure of the product has a large amount of hydrophilic groups, the hydrophilic groups form a large amount of micro-cross-linked structures, the molecular network can adsorb a large amount of water molecules and release the water molecules in a water-deficient environment, the workability of the concrete and wet-mixed mortar can be obviously improved, the wrapping performance of the concrete and wet-mixed mortar is improved, the phenomena of segregation and bleeding are improved, a good balance among fluidity, cohesiveness and segregation resistance of a mixture is formed, the water retention agent is good in applicability and has certain dispersibility, the segregation and bleeding phenomenon of the concrete can be effectively improved, and the compactness and the strength of the concrete are obviously improved, the method has the advantages of polymerization at normal temperature, high reaction rate, simple process, easy control, low energy consumption, high production efficiency, no pollution in the synthesis process and good product quality.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete is characterized by comprising 5-10 parts of sodium propenyl sulfonate, 5-10 parts of acrylamide, 5-10 parts of hydrogen peroxide, 0.3-0.5 part of hydrogen peroxide, 10 parts of acrylic acid, 0.1-0.5 part of mercaptopropionic acid and 0.1-0.2 part of VC, wherein the ratio of sodium propenyl sulfonate to water is that of the polycarboxylic acid water-retaining agent.
2. The polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete is characterized by comprising 10 parts of sodium propenyl sulfonate, 10 parts of acrylamide, 0.5 part of hydrogen peroxide, 10 parts of acrylic acid, 0.5 part of mercaptopropionic acid and 0.2 part of VC, wherein the ratio of sodium propenyl sulfonate, the ratio of acrylamide, the ratio of hydrogen peroxide, the ratio of acrylic acid and the ratio of VC are contained in the mixture of water and acrylic acid, and deionized water.
3. The polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete is characterized by comprising 5 parts of sodium propenyl sulfonate, 5 parts of acrylamide, 0.3 part of hydrogen peroxide, 10 parts of acrylic acid, 0.2 part of mercaptopropionic acid and 0.1 part of VC, wherein the ratio of sodium propenyl sulfonate, the ratio of acrylamide to hydrogen peroxide, the ratio of acrylic acid to mercaptopropionic acid to deionized water are included.
4. The preparation method of the polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete according to any one of claims 1 to 3, characterized in that the preparation steps comprise the following steps:
s1, preparing materials: firstly, taking out a three-neck flask with a stirring thermometer, then taking out all raw materials required to be used, and weighing for later use according to a fixed weight;
s2, stirring and mixing: firstly, adding a certain amount of deionized water into a three-neck flask, then stirring by using a stirring rod, then adding a certain amount of sodium propenyl sulfonate and acrylamide, stirring until the mixture is preliminarily mixed, then adding a certain amount of hydrogen peroxide, stirring again, simultaneously dropwise adding a good solution diluted by acrylic acid and the same amount of deionized water at a constant speed, and then dropwise adding mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC;
s3, standing: and (3) placing the preliminarily processed liquid raw materials in a sealed environment for heat preservation, and then adjusting the pH value to 8-9 by using liquid caustic soda sodium hydroxide to obtain the light yellow transparent polycarboxylic acid water-retaining agent.
5. The method for preparing the polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete according to claim 4, characterized in that in step S2, a certain amount of deionized water is added into a three-neck flask, then a stirring rod is used for stirring, then a certain amount of sodium propenyl sulfonate and acrylamide are added and stirred until the mixture is primarily mixed, then a certain amount of hydrogen peroxide is added and stirred again, the stirring time is set to 30min, meanwhile, acrylic acid and a good solution diluted by the same amount of deionized water are dropwise added within 30min at a constant speed, and then mercaptopropionic acid, the same amount of deionized water solution and a certain amount of reducing agent VC are dropwise added.
6. The method for preparing the polycarboxylic acid water-retaining agent for wet-mixed mortar and concrete according to claim 4, wherein in step S3, the preliminarily processed liquid raw materials are placed in a sealed environment with the temperature of 25 ℃ for heat preservation, the heat preservation time is set to 1h, and then liquid caustic soda sodium hydroxide is used for adjusting the pH value to 8-9, so as to obtain the light yellow transparent polycarboxylic acid water-retaining agent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116355141A (en) * | 2023-03-29 | 2023-06-30 | 石家庄市长安育才建材有限公司 | Concrete modulator, preparation method thereof, concrete additive and concrete composition |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116355141A (en) * | 2023-03-29 | 2023-06-30 | 石家庄市长安育才建材有限公司 | Concrete modulator, preparation method thereof, concrete additive and concrete composition |
| CN116355141B (en) * | 2023-03-29 | 2023-09-22 | 石家庄市长安育才建材有限公司 | Concrete modulator, preparation method thereof, concrete additive and concrete composition |
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Application publication date: 20210709 |