CN115353319B - Water-retaining agent and preparation method and application thereof - Google Patents
Water-retaining agent and preparation method and application thereof Download PDFInfo
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- CN115353319B CN115353319B CN202210784342.1A CN202210784342A CN115353319B CN 115353319 B CN115353319 B CN 115353319B CN 202210784342 A CN202210784342 A CN 202210784342A CN 115353319 B CN115353319 B CN 115353319B
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- water
- retaining agent
- polyacrylic acid
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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
- C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
- C04B2103/465—Water-sorbing agents, hygroscopic or hydrophilic agents
Abstract
The invention discloses a water-retaining agent, a preparation method and application thereof. The water-retaining agent can solve the problems of segregation, bleeding, poor cohesiveness and poor workability of concrete materials.
Description
Technical Field
The invention belongs to the technical field of concrete additives, and particularly relates to a water-retaining agent, a preparation method and application thereof.
Background
The polycarboxylic acid high-performance water reducer has the advantages of low mixing amount, high water reducing rate, green environmental protection and the like, and is widely used as a concrete additive. However, along with the forbidden collection of river sand, the shortage of sand resources and the large-scale use of machine-made sand in the concrete production process, compared with naphthalene water reducers, aliphatic water reducers and the like, the polycarboxylic acid water reducers are sensitive to the mixing amount, the temperature and the aggregate in the concrete, and segregation and bleeding phenomena are easy to occur, so that the quality of the concrete is difficult to ensure.
In the prior art, the polycarboxylate water reducer, the viscosity modifier and the water-retaining agent are compounded for use, but the obtained cement particles have poor dispersibility, cohesiveness and cohesive force.
Therefore, the development of a water-retaining agent can solve the problems of segregation, bleeding, poor cohesiveness and poor workability of concrete materials, and is urgent at present.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the water-retaining agent, and the preparation method and application thereof, which can effectively reduce segregation and bleeding of concrete and promote cohesiveness and workability of concrete.
The invention also provides a preparation method of the water-retaining agent.
The invention also provides application of the water-retaining agent in concrete.
According to an embodiment of the first aspect of the invention, the water-retaining agent is prepared from sodium hydroxide, polyacrylic acid-acrylic acid ester copolymer, polyacrylic acid, gelatin, hydroxypropyl guar gum and maltodextrin.
The embodiment of the first aspect of the invention has at least the following advantages:
1. the gelatin and the hydroxypropyl guar gum can lock free water in the concrete, and solve the segregation and bleeding problems of the concrete.
2. The polyacrylic acid-acrylic acid ester copolymer and polyacrylic acid in the water-retaining agent provided by the invention are rich in carboxyl groups, can improve compatibility with a polycarboxylate water reducer, have functional groups with adsorptivity and surface activity, can increase cohesiveness and cohesive force of cement cementing materials, and improve cohesiveness of concrete. Carboxyl groups and ester groups (the ester groups become carboxyl groups after hydrolysis), the carboxyl groups being formed by adsorption of Ca 2+ Ca2+ is positive charge on the surface, and carboxyl R-COO-is negative charge on the surface, and after the two are mutually complexed, the surface is close to electric neutrality, so that Ca is reduced 2+ Thereby playing a role in dispersing cement particles.
3. The cement cementing material is an alkaline substance, and a large amount of heat and bubbles can be released when the cement cementing material encounters acid, so that the cement cementing material is unfavorable for use, and the added sodium hydroxide plays a role in neutralization. The air bubbles are avoided in the subsequent cement use process, the dispersing and viscosity-adjusting effects are achieved, the workability of the concrete is improved, and the construction is facilitated.
4. The carboxyl group of the polyacrylic acid-acrylic ester copolymer can be slowly released in an alkaline environment, so that the hysteresis dispersion capability of the product is improved, the loss of concrete is reduced, and the long-time construction of the concrete is facilitated.
According to some embodiments of the invention, the water-retaining agent is prepared from raw materials including xanthan gum, wen Lunjiao, polyacrylamide and cellulose.
According to some embodiments of the invention, the cellulose comprises at least one of hydroxypropyl methylcellulose, hydroxyethyl cellulose.
According to some embodiments of the invention, the water-retaining agent is prepared from a raw material further comprising water.
According to some embodiments of the invention, the polyacrylamide comprises a polyacrylamide anion.
The addition of polyacrylamide anions ensures the dispersion of cement particles and maintains the water retention, segregation and bleeding resistance of the cement gel material.
According to some embodiments of the invention, the molecular weight of the polyacrylamide anion is 300×10 4 ～1500×10 4 。
According to some embodiments of the invention, the polyacrylic acid is present in an amount of 20% to 50%.
According to some embodiments of the invention, the polyacrylic acid has a molecular weight of 3000-100000.
According to some embodiments of the invention, the acrylic acid-acrylic acid ester copolymer content is 20% to 50%.
According to some embodiments of the invention, the acrylic acid-acrylic acid ester copolymer has a molecular weight of 3000 to 100000.
Meanwhile, in the molecular weight range, the action strength of polyacrylic acid on dispersing cement particles is ensured, and meanwhile, the viscosity regulating effect is also achieved.
According to some embodiments of the present invention, the water-retaining agent is prepared from 1 to 10 parts by weight of sodium hydroxide, 50 to 120 parts by weight of the polyacrylic acid-acrylic ester copolymer, 50 to 150 parts by weight of the polyacrylic acid, and 1 to 5 parts by weight of maltodextrin.
According to some embodiments of the present invention, the water-retaining agent is prepared from, by weight, 1 to 5 parts of the xanthan gum, 1 to 5 parts of the temperature roller gum, 1 to 5 parts of the polyacrylamide, and 1 to 5 parts of the cellulose.
According to some embodiments of the present invention, the water-retaining agent is prepared from 50 to 150 parts by weight of the polyacrylic acid, 50 to 120 parts by weight of the polyacrylic acid-acrylic ester copolymer, 5 to 10 parts by weight of the gelatin, 1 to 5 parts by weight of the polyacrylamide, 1 to 5 parts by weight of the cellulose, 1 to 5 parts by weight of the temperature roller gum, 1 to 5 parts by weight of the xanthan gum, 1 to 5 parts by weight of the hydroxypropyl guar gum, 1 to 10 parts by weight of the sodium hydroxide, 1 to 5 parts by weight of the maltodextrin, 0.1 to 2 parts by weight of the preservative, and 698 to 917.9 parts by weight of the deionized water.
According to a second aspect of the present invention, the method for preparing the water-retaining agent comprises dissolving the maltodextrin and the hydroxypropyl guar, adding the sodium hydroxide, and mixing the polyacrylic acid and the polyacrylic acid-acrylic ester copolymer.
According to some preferred embodiments of the present invention, the method for preparing the water-retaining agent comprises the steps of:
s1, adding the cellulose, the hotplate gum, the xanthan gum, the hydroxypropyl guar gum, the polyacrylamide, the gelatin and the maltodextrin into water for dissolution;
and S2, adding the sodium hydroxide, the polyacrylic acid and the polyacrylic acid-acrylic ester copolymer into the mixture dissolved in the step S2, and mixing.
The water-retaining agent provided by the invention belongs to an environment-friendly concrete additive, has simple process and easily obtained raw materials, does not generate three wastes in the production process, is environment-friendly, and is suitable for industrial scale production.
The use of a water retaining agent according to an embodiment of the third aspect of the present invention in concrete.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following examples are illustrative only and are not to be construed as limiting the invention.
Example 1
The embodiment provides a water-retaining agent which comprises the following components:
796.3g of ionized water, 1.0g of cellulose (CAS number: 9004-65-3), 1.2g of temperature roller gum (CAS number: 96949-22-3), 1.5g of xanthan gum (CAS number: 11138-66-2), 3.5g of hydroxypropyl guar gum (CAS number: 39421-75-5), 2.0g of gelatin, 3.5g of maltodextrin (CAS number: 9050-36-6), 2.0g of polyacrylamide (CAS number: 9003-05-8), 8.0g of sodium hydroxide (CAS number: 1310-73-2), 100g (CAS number: 9003-01-4) of polyacrylic acid with a molecular weight of 5000 (CAS number: 9003-01-4), 80g (CAS number: 25133-97-5) of polyacrylic acid ester copolymer with a molecular weight of 10000 (CAS number: 25133-5), and 1.0g of preservative.
The gelatin can be obtained from Shanghai Shunhua Co., ltd;
the above preservative is available from Shanghai, inc.
Example 2
The embodiment prepares a water-retaining agent, which comprises the following specific steps:
s1, weighing deionized water according to the components in the embodiment 1, adding cellulose, xanthan gum, hydroxypropyl guar gum, gelatin, maltodextrin and polyacrylamide, and stirring for 90min to completely dissolve.
S2, adding sodium hydroxide, polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), polyacrylic acid-acrylic ester copolymer with 10000 molecular weight (the mass concentration is 36%), stirring for 60min, and adding 1g of preservative after complete dissolution. And uniformly stirring to obtain the concrete water-retaining agent.
Example 3
The embodiment provides a water-retaining agent which comprises the following components:
746.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 150g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%) and 1.0g of preservative.
Example 4
This example produced a water retaining agent with the difference of example 2 in that the components of example 3 were prepared by weight, and the other conditions were the same as in example 2.
Example 5
The embodiment provides a water-retaining agent which comprises the following components:
776.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 100g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%), and 1.0g of preservative.
Example 6
This example produced a water retaining agent with the difference of example 2 in that the components of example 5 were prepared by weight, and the other conditions were the same as in example 2.
Example 7
The embodiment provides a water-retaining agent which comprises the following components:
850.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 80g of polyacrylic acid with 20000 molecular weight (the mass concentration is 30%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%), and 1.0g of preservative.
Example 8
This example produced a water retaining agent with the difference of example 2 in that the components of example 7 were prepared by weight, and the other conditions were the same as in example 2.
Example 9
The embodiment provides a water-retaining agent which comprises the following components:
796.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 50000 molecular weight (the mass concentration is 28%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%), and 1.0g of preservative.
Example 10
This example produced a water retaining agent with the difference of example 2 in that the components of example 9 were prepared by weight, and the other conditions were the same as in example 2.
Example 11
The embodiment provides a water-retaining agent which comprises the following components:
796.3g of ionized water, 3.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 50000 molecular weight (the mass concentration is 28%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%), and 1.0g of preservative.
Example 12
This example produced a water retaining agent with the difference of example 2 in that the components of example 11 were prepared by weight, and the other conditions were the same as in example 2.
Example 13
The embodiment provides a water-retaining agent which comprises the following components:
794.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 4.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%) and 1.0g of preservative.
Example 14
This example produced a water retaining agent with the difference of example 2 in that the components of example 13 were prepared by weight, and the other conditions were the same as in example 2.
Example 15
The embodiment provides a water-retaining agent which comprises the following components:
794.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 5.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%) and 1.0g of preservative.
Example 16
This example produced a water retaining agent with the difference of example 2 in that the components of example 15 were prepared by weight, and the other conditions were the same as in example 2.
Example 17
The embodiment provides a water-retaining agent which comprises the following components:
794.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 3.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%) and 1.0g of preservative.
Example 18
This example produced a water retaining agent with the difference of example 2 in that the components of example 17 were prepared by weight, and the other conditions were the same as in example 2.
Example 19
The embodiment provides a water-retaining agent which comprises the following components:
794.3g of ionized water, 1.0g of cellulose, 3.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%) and 1.0g of preservative.
Example 20
This example produced a water retaining agent with the difference of example 2 in that the components of example 19 were prepared by weight, and the other conditions were the same as in example 2.
Example 21
The embodiment provides a water-retaining agent which comprises the following components:
794.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 5.5g of maltodextrin, 2.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%) and 1.0g of preservative.
Example 22
This example produced a water retaining agent with the difference of example 2 in that the components of example 21 were prepared by weight, and the other conditions were the same as in example 2.
Example 23
The embodiment provides a water-retaining agent which comprises the following components:
794.3g of ionized water, 1.0g of cellulose, 1.2g of hotplate gum, 1.5g of xanthan gum, 3.5g of hydroxypropyl guar gum, 2.0g of gelatin, 3.5g of maltodextrin, 4.0g of polyacrylamide, 8.0g of sodium hydroxide, 100g of polyacrylic acid with 5000 molecular weight (the mass concentration is 40%), 80g of 10000 molecular weight polyacrylic acid-acrylic ester copolymer (the mass concentration is 36%) and 1.0g of preservative.
Example 24
This example produced a water retaining agent with the difference of example 2 in that the weight of each component in example 23 was used, and the other conditions were the same as in example 2.
Comparative example 1
This comparative example provides a water retaining agent, and this comparative example 1 differs from example 1 in that sodium hydroxide in example 1 is not included, and the remaining conditions are the same.
Comparative example 2
This comparative example a water-retaining agent was prepared, and this comparative example 2 and example 2 were different in that the preparation was made according to the weight of each component in comparative example 1, and the other conditions were the same as in example 2.
Comparative example 3
This comparative example provides a water-retaining agent, and this comparative example 1 differs from example 1 in that the polyacrylic acid-acrylic acid ester copolymer in example 1 is not included, and the remaining conditions are the same.
Comparative example 4
This comparative example a water-retaining agent was prepared, and this comparative example 2 and example 2 were different in that the preparation was carried out in accordance with the weight of each component in comparative example 3, and the other conditions were the same as in example 2.
Comparative example 5
This comparative example provides a water-retaining agent, and this comparative example 1 differs from example 1 in that gelatin of example 1 is not included, and the remaining conditions are the same.
Comparative example 6
This comparative example a water-retaining agent was prepared, and this comparative example 2 and example 2 were different in that the preparation was made according to the weight of each component in comparative example 5, and the other conditions were the same as in example 2.
Comparative example 7
This comparative example provides a water retaining agent, and this comparative example 1 differs from example 1 in that hydroxypropyl guar of example 1 is excluded, with the remaining conditions being the same.
Comparative example 8
This comparative example a water-retaining agent was prepared, and this comparative example 2 and example 2 were different in that the preparation was made according to the weight of each component in comparative example 7, and the other conditions were the same as in example 2.
Comparative example 9
This comparative example provides a water retaining agent, and this comparative example 1 differs from example 1 in that maltodextrin of example 1 is not included, and the remaining conditions are the same.
Comparative example 10
This comparative example a water-retaining agent was prepared, and this comparative example 2 and example 2 were different in that the preparation was made according to the weight of each component in comparative example 9, and the other conditions were the same as in example 2.
Test example 1
The concrete water retention verification is carried out by adding the water retention agent prepared in the above examples and comparative examples into concrete as follows:
concrete mix specific formulation ratios are shown in table 1:
table 1: concrete mixing ratio (kg/m) 3 )
| Strength equal to strength | Cement and its preparation method | Fly ash | Sand and sand | Broken stone | Water and its preparation method |
| C30 | 260 | 80 | 900 | 1030 | 165 |
Wherein the cement is PO42.5 cement in the south of the peach river, the fly ash is two-strength fly ash, the sand is machine-made sand with fineness modulus of 3.0, the particle size of broken stone is 5mm-40mm, and meanwhile, 0.3 percent of water-retaining agent is added into the polycarboxylic acid water reducer with solid content of 9 percent.
The working performance of the concrete mixture is tested according to the detection method in GB/T50080-2016 Standard for common concrete mixture Performance test method.
The concrete bleeding rate detection method specifically comprises the following steps:
1. immediately weighing the inner wall of Rong Liangtong after wetting the inner wall with wet cloth, and recording the mass of the measuring cylinder;
2. filling the concrete mixture into a volumetric cylinder;
3. cleaning the cylinder mouth and the outer surface, weighing and recording the mass of the volumetric cylinder and the sample, covering the cylinder cover and starting timing;
4. within 60 minutes after timing begins, 1 bleeding on the surface of the sample should be sucked every 10 minutes; after 60min, 1 sample surface bleed was taken every 30min until no more bleed occurred.
Bleeding rate was calculated according to the following formula: b=v W /[(W/m T )·m]；
m＝m 1 -m 2 ；
Wherein V is W The bleeding amount (mL), m is the mass (g) of a concrete mixture sample, mT is the total mass (g) of the concrete mixture subjected to test mixing, and W is the test mixingMixing water consumption (mL), m for preparing concrete mixture 1 Is the mass (g), m of the volume cylinder 2 The total mass (g) of the sample was represented by the volume cylinder.
The concrete mix workability test results are shown in table 2:
table 2: concrete working performance
As can be seen from table 2: the bleeding rate and the concrete slump of the examples are each smaller than those of the comparative examples. Therefore, the water-retaining tackifier prepared by the invention can reduce the viscosity and bleeding rate of concrete, and meanwhile, the water-retaining agent has a better improving effect on the viscosity of the concrete, and can effectively improve the fluidity of the concrete.
The present invention has been described in detail with reference to the above embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (6)
1. The water-retaining agent is characterized in that the preparation raw materials comprise sodium hydroxide, polyacrylic acid-acrylic ester copolymer, polyacrylic acid, gelatin, hydroxypropyl guar gum and maltodextrin;
the preparation raw materials comprise, by weight, 1-10 parts of sodium hydroxide, 50-120 parts of polyacrylic acid-acrylic ester copolymer, 5-10 parts of gelatin, 1-5 parts of hydroxypropyl guar gum, 50-150 parts of polyacrylic acid and 1-5 parts of maltodextrin;
the molecular weight of the polyacrylic acid is 3000-100000,
the raw materials for preparing the water-retaining agent also comprise xanthan gum, wen Lunjiao, polyacrylamide and cellulose,
the preparation raw materials comprise, by weight, 1-5 parts of xanthan gum, 1-5 parts of Wen Lunjiao, 1-5 parts of polyacrylamide and 1-5 parts of cellulose.
2. The water-retaining agent according to claim 1, wherein the polyacrylic acid has a solids content of 20% -50%.
3. The water-retaining agent according to claim 1, characterized in that the solid content of the acrylic acid-acrylic acid ester copolymer is 20% -50%.
4. The water-retaining agent according to claim 1, wherein the molecular weight of the acrylic acid-acrylic ester copolymer is 3000 to 100000.
5. A method for preparing the water-retaining agent according to any one of claims 1 to 4, wherein the method comprises dissolving maltodextrin and hydroxypropyl guar, adding sodium hydroxide, and mixing polyacrylic acid and polyacrylic acid-acrylic ester copolymer.
6. The application of the water-retaining agent according to any one of claims 1 to 4 in concrete.
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| CN103553418A (en) * | 2013-09-27 | 2014-02-05 | 江苏兆佳建材科技有限公司 | Ready-mixed mortar water-retention thixotropic agent and preparation method thereof |
| CN103819121A (en) * | 2014-01-20 | 2014-05-28 | 贵州石博士科技有限公司 | Concrete thickening and water-retaining agent and preparation method thereof |
| EP3178797A1 (en) * | 2015-12-10 | 2017-06-14 | Vicat | Ductile construction material |
| CN110003375A (en) * | 2019-04-24 | 2019-07-12 | 刘翠芬 | A kind of salt resistance concrete water-retaining agent and preparation method thereof |
| CN110407508A (en) * | 2018-05-29 | 2019-11-05 | 临沂大学 | A kind of wet mixing mortar additive |
| CN113461362A (en) * | 2021-07-27 | 2021-10-01 | 深圳市三绿科技有限公司 | Concrete water-retaining agent and preparation method thereof |
| CN114656224A (en) * | 2022-04-27 | 2022-06-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-cementing-material self-compacting concrete and preparation method thereof |
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2022
- 2022-07-05 CN CN202210784342.1A patent/CN115353319B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553418A (en) * | 2013-09-27 | 2014-02-05 | 江苏兆佳建材科技有限公司 | Ready-mixed mortar water-retention thixotropic agent and preparation method thereof |
| CN103819121A (en) * | 2014-01-20 | 2014-05-28 | 贵州石博士科技有限公司 | Concrete thickening and water-retaining agent and preparation method thereof |
| EP3178797A1 (en) * | 2015-12-10 | 2017-06-14 | Vicat | Ductile construction material |
| CN110407508A (en) * | 2018-05-29 | 2019-11-05 | 临沂大学 | A kind of wet mixing mortar additive |
| CN110003375A (en) * | 2019-04-24 | 2019-07-12 | 刘翠芬 | A kind of salt resistance concrete water-retaining agent and preparation method thereof |
| CN113461362A (en) * | 2021-07-27 | 2021-10-01 | 深圳市三绿科技有限公司 | Concrete water-retaining agent and preparation method thereof |
| CN114656224A (en) * | 2022-04-27 | 2022-06-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-cementing-material self-compacting concrete and preparation method thereof |
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