CN112250341A - Preparation method of concrete waterproofing agent - Google Patents
Preparation method of concrete waterproofing agent Download PDFInfo
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- CN112250341A CN112250341A CN202011141169.0A CN202011141169A CN112250341A CN 112250341 A CN112250341 A CN 112250341A CN 202011141169 A CN202011141169 A CN 202011141169A CN 112250341 A CN112250341 A CN 112250341A
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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
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of a concrete waterproof agent, which comprises the following steps of: 7.5-1: and 9, mixing, stirring for reaction, and stirring for mixing to obtain the calcium sulphoaluminate expanding agent, which can effectively improve the internal structure of the concrete, wherein the calcium sulphoaluminate expanding agent selects gypsum powder as a raw material, can block capillary channels in the concrete, obviously improves the anti-permeability and waterproof functions of the concrete, has the effects of strengthening, reducing water, resisting crack and the like, can improve the workability of fresh concrete, obviously improves the working timeliness of the concrete, is suitable for anti-permeability and moisture-proof engineering in the aspect of buildings, and is suitable for large-scale popularization.
Description
Technical Field
The invention relates to the field of concrete waterproofing agents, in particular to a preparation method of a concrete waterproofing agent.
Background
Concrete is a brittle material, has low tensile strength and small ultimate tensile strain, and when the internal stress generated by volume shrinkage caused by drying shrinkage, chemical shrinkage, carbonization shrinkage and the like exceeds the tensile strength of the concrete during the setting and hardening process, the concrete is inevitably cracked, the impermeability of the structure is damaged, and therefore, the concrete needs to be protected from water.
The concrete waterproofing agent has the function of improving the impermeability and waterproofing of concrete, the impermeability grade can reach more than P25, and the concrete waterproofing agent has the effects of retarding coagulation, early strength, reducing water, resisting crack and the like, can improve the workability of newly mixed mortar, and can replace lime cream; the concrete is particularly suitable for concrete for the top of a single-storey house, large-volume waterproof concrete, hydraulic concrete, waterproof mortar and the like. Can thoroughly and radically cure roof water leakage, wall body moisture regain and ground water seepage, and is the cheapest, ideal and reliable preferred material in China.
However, the duration of concrete waterproofers currently on the market is not significant and frequent waterproofing of concrete is required.
Disclosure of Invention
Therefore, the invention provides a preparation method of a concrete waterproof agent to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the preparation method of the concrete waterproof agent is characterized by comprising the following preparation process steps:
(1) mixing calcium sulphoaluminate and gypsum powder according to the mass ratio of 1: 7.5-1: 9, mixing, stirring and mixing after stirring reaction to obtain a calcium sulphoaluminate expanding agent;
(2) mixing the polyurethane mixture and acrylic styrene-acrylic emulsion according to a mass ratio of 20: 1-22: 1, adding sodium sulfite with the mass 1-3 times that of the acrylic styrene-acrylic emulsion, stirring and reacting to obtain a pretreated polyurethane mixture, and mixing the pretreated polyurethane mixture with a stabilizer according to the mass ratio of 77: 1-88: 1, mixing, adding vinyl chloride-vinyl acetate copolymer resin which is 0.05-0.12 times of the mass of the pretreated polyurethane mixture, stirring for reaction to obtain a treating agent mixture, extracting the treating agent mixture, and filtering to obtain a filtrate, namely a novel polyurethane mixture;
(3) mixing water and an anhydrous alcohol solvent according to a mass ratio of 1: 8-1: 10, adding ethyl orthosilicate with the mass of 0.02-0.07 time of that of water and a catalyst with the mass of 0.2-0.5 time of that of water, stirring and mixing to obtain a concrete waterproof agent blank, and mixing the concrete waterproof agent blank and a calcium sulphoaluminate expanding agent according to the mass ratio of 5: 1-8: 1, adding a novel polyurethane mixture accounting for 0.3-0.5 time of the mass of the concrete waterproof agent blank and silicon rubber granules accounting for 0.3-0.5 time of the mass of the concrete waterproof agent blank, and stirring and mixing to obtain the concrete waterproof agent.
Further, preferably, fluorgypsum powder is used as the gypsum powder in the step (1).
Further, it is preferable that the temperature of the calcium sulfoaluminate in the step (1) is set to 30 to 35 ℃.
Further, it is preferable that the extractant used in the extraction in the step (2) is diethyl ether.
Further, preferably, in the step (3), a mineral admixture, specifically a mixture of zeolite powder, alunite powder, hardened cement stone powder and slag powder, may be added to the concrete waterproofing agent blank.
Compared with the prior art, the invention has the beneficial effects that:
the concrete waterproof agent can effectively improve the internal structure of concrete, adopts calcium sulphoaluminate as a raw material, can block capillary channels in the concrete, obviously improves the anti-permeability and waterproof functions of the concrete, has the effects of enhancing, reducing water, resisting crack and the like, can improve the workability of fresh concrete, and obviously improves the working timeliness of the concrete, and also has the following characteristics:
1. according to the invention, calcium aluminosilicate and calcium sulphoaluminate are compounded, so that the expansion effect is enhanced, and meanwhile, a calcium oxide and a magnesium oxide expansion source are combined.
2. Through the modified calcium oxide, a composite film is formed on the surface of the calcium oxide, the hydration speed is effectively controlled, the expansion speed is slowed down, most of the expansion process is synchronous with the concrete shrinkage, cracks generated by the concrete shrinkage are reduced, and the aim of water prevention is fulfilled.
3. Ferric sulfate can provide sulfate radicals, promote the formation of ettringite, enhance the expansion effect, form ferric hydroxide colloid and improve the compactness of concrete.
Drawings
FIG. 1 is a schematic flow chart of a method for producing a concrete waterproofing agent.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Example (b): referring to fig. 1, the present invention provides a technical solution: a preparation method of a concrete waterproofing agent comprises the following steps:
(1) mixing calcium sulphoaluminate and gypsum powder according to the mass ratio of 1: 7.5-1: 9, mixing, stirring and mixing after stirring reaction to obtain a calcium sulphoaluminate expanding agent;
(2) mixing the polyurethane mixture and acrylic styrene-acrylic emulsion according to a mass ratio of 20: 1-22: 1, adding sodium sulfite with the mass 1-3 times that of the acrylic styrene-acrylic emulsion, stirring and reacting to obtain a pretreated polyurethane mixture, and mixing the pretreated polyurethane mixture with a stabilizer according to the mass ratio of 77: 1-88: 1, mixing, adding vinyl chloride-vinyl acetate copolymer resin which is 0.05-0.12 times of the mass of the pretreated polyurethane mixture, stirring for reaction to obtain a treating agent mixture, extracting the treating agent mixture, and filtering to obtain a filtrate, namely a novel polyurethane mixture;
(3) mixing water and an anhydrous alcohol solvent according to a mass ratio of 1: 8-1: 10, adding ethyl orthosilicate with the mass of 0.02-0.07 time of that of water and a catalyst with the mass of 0.2-0.5 time of that of water, stirring and mixing to obtain a concrete waterproof agent blank, and mixing the concrete waterproof agent blank and a calcium sulphoaluminate expanding agent according to the mass ratio of 5: 1-8: 1, adding a novel polyurethane mixture accounting for 0.3-0.5 time of the mass of the concrete waterproof agent blank and silicon rubber granules accounting for 0.3-0.5 time of the mass of the concrete waterproof agent blank, and stirring and mixing to obtain the concrete waterproof agent.
In this embodiment, the gypsum powder in step (1) is fluorgypsum powder.
In this example, the temperature of the calcium sulfoaluminate in the step (1) was set to 30 to 35 ℃.
In this embodiment, the extractant used in the extraction in step (2) is diethyl ether.
In this embodiment, a mineral admixture may be added to the concrete waterproofing agent blank in step (3), and the mineral admixture is specifically a mixture of zeolite powder, alunite powder, hardened cement powder, and slag powder.
According to the experimental data of the concrete waterproof agent, the following results are obtained:
a. limiting expansion rate: 7d in water is more than or equal to 0.025 percent, and 28d in water is less than or equal to 0.10 percent;
b. the fineness is less than 12 percent;
c. mixing amount: adding 8-12% of the concrete gel material according to different positions and engineering requirements;
d. compressive strength: the setting time is not lower than that of the reference concrete, and the setting time is the same as that of the reference concrete, so that the slump is not influenced;
e. the adaptability to chemical additives is good, the alkali content is low, and the hydration heat of concrete can be reduced by more than 10-15%;
f. durability: the anti-permeability grade is more than P30, and the anti-freezing grade is more than F150; the corrosion inhibitor does not contain chloride ions and has no corrosion effect on the steel bars; the chemical erosion resistance, the wear resistance and the carbonization resistance are superior to those of common concrete; no toxicity, no smell and no influence on water quality.
g. The shelf life is one year, and after expiration, the physical performance test is carried out again, and the product can be used continuously after being determined.
h. Should be placed in dry place, strictly protected from moisture, if block, should be pulverized for use, and its performance is unchanged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The preparation method of the concrete waterproof agent is characterized by comprising the following preparation process steps:
(1) mixing calcium sulphoaluminate and gypsum powder according to the mass ratio of 1: 7.5-1: 9, mixing, stirring and mixing after stirring reaction to obtain a calcium sulphoaluminate expanding agent;
(2) mixing the polyurethane mixture and acrylic styrene-acrylic emulsion according to a mass ratio of 20: 1-22: 1, adding sodium sulfite with the mass 1-3 times that of the acrylic styrene-acrylic emulsion, stirring and reacting to obtain a pretreated polyurethane mixture, and mixing the pretreated polyurethane mixture with a stabilizer according to the mass ratio of 77: 1-88: 1, mixing, adding vinyl chloride-vinyl acetate copolymer resin which is 0.05-0.12 times of the mass of the pretreated polyurethane mixture, stirring for reaction to obtain a treating agent mixture, extracting the treating agent mixture, and filtering to obtain a filtrate, namely a novel polyurethane mixture;
(3) mixing water and an anhydrous alcohol solvent according to a mass ratio of 1: 8-1: 10, adding ethyl orthosilicate with the mass of 0.02-0.07 time of that of water and a catalyst with the mass of 0.2-0.5 time of that of water, stirring and mixing to obtain a concrete waterproof agent blank, and mixing the concrete waterproof agent blank and a calcium sulphoaluminate expanding agent according to the mass ratio of 5: 1-8: 1, adding a novel polyurethane mixture accounting for 0.3-0.5 time of the mass of the concrete waterproof agent blank and silicon rubber granules accounting for 0.3-0.5 time of the mass of the concrete waterproof agent blank, and stirring and mixing to obtain the concrete waterproof agent.
2. A method for producing a concrete waterproofing agent according to claim 1, characterized in that: in the step (1), the gypsum powder is fluorgypsum powder.
3. A method for producing a concrete waterproofing agent according to claim 1, characterized in that: the temperature of the calcium sulphoaluminate in the step (1) is set to be 30-35 ℃.
4. A method for producing a concrete waterproofing agent according to claim 1, characterized in that: and (3) setting an extracting agent used for the extraction in the step (2) as diethyl ether.
5. A method for producing a concrete waterproofing agent according to claim 1, characterized in that: mineral admixtures can be added into the concrete waterproof agent blank in the step (3), and the mineral admixtures are specifically a mixture of zeolite powder, alunite powder, hardened cement stone powder and slag powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011141169.0A CN112250341A (en) | 2020-10-22 | 2020-10-22 | Preparation method of concrete waterproofing agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011141169.0A CN112250341A (en) | 2020-10-22 | 2020-10-22 | Preparation method of concrete waterproofing agent |
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| CN112250341A true CN112250341A (en) | 2021-01-22 |
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| CN202011141169.0A Withdrawn CN112250341A (en) | 2020-10-22 | 2020-10-22 | Preparation method of concrete waterproofing agent |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106699005A (en) * | 2016-12-12 | 2017-05-24 | 辽宁省交通规划设计院有限责任公司 | Composite waterproofing agent for improving salt frost resistant performance of highway low-strength grade concrete |
| CN109928658A (en) * | 2019-04-19 | 2019-06-25 | 湖北恒利建材科技有限公司 | A kind of corrosion-prevention rust-resistance type high-performance mixed mud waterproofing agent |
| KR101993203B1 (en) * | 2019-02-27 | 2019-06-27 | 주식회사 대우건설 | Manufacturing Method of the Hydrophilic Silane Water Repellent Agent, High Performance Waterproofing Admixture Composition for Concrete Using the Water Repellent Agent and Concrete Composition Using the Waterproofing Admixture Composition |
| CN110002787A (en) * | 2019-02-25 | 2019-07-12 | 周晓东 | A kind of preparation method of holding effect type celluar concrete waterproofing agent |
| CN110395940A (en) * | 2019-08-29 | 2019-11-01 | 湖南加美乐素新材料股份有限公司 | One kind being used for the dedicated kitchen and bath's waterproofing agent of prefabricated components concrete |
-
2020
- 2020-10-22 CN CN202011141169.0A patent/CN112250341A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106699005A (en) * | 2016-12-12 | 2017-05-24 | 辽宁省交通规划设计院有限责任公司 | Composite waterproofing agent for improving salt frost resistant performance of highway low-strength grade concrete |
| CN110002787A (en) * | 2019-02-25 | 2019-07-12 | 周晓东 | A kind of preparation method of holding effect type celluar concrete waterproofing agent |
| KR101993203B1 (en) * | 2019-02-27 | 2019-06-27 | 주식회사 대우건설 | Manufacturing Method of the Hydrophilic Silane Water Repellent Agent, High Performance Waterproofing Admixture Composition for Concrete Using the Water Repellent Agent and Concrete Composition Using the Waterproofing Admixture Composition |
| CN109928658A (en) * | 2019-04-19 | 2019-06-25 | 湖北恒利建材科技有限公司 | A kind of corrosion-prevention rust-resistance type high-performance mixed mud waterproofing agent |
| CN110395940A (en) * | 2019-08-29 | 2019-11-01 | 湖南加美乐素新材料股份有限公司 | One kind being used for the dedicated kitchen and bath's waterproofing agent of prefabricated components concrete |
Non-Patent Citations (1)
| Title |
|---|
| 张巨松等: "《混凝土原材料》", 31 January 2019, 哈尔滨工业大学出版社 * |
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Application publication date: 20210122 |
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