CN112159148B - Preparation and application method of solid carboxylic acid type water reducing agent - Google Patents
Preparation and application method of solid carboxylic acid type water reducing agent Download PDFInfo
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- CN112159148B CN112159148B CN202011108626.6A CN202011108626A CN112159148B CN 112159148 B CN112159148 B CN 112159148B CN 202011108626 A CN202011108626 A CN 202011108626A CN 112159148 B CN112159148 B CN 112159148B
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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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
Abstract
The invention discloses a preparation method and an application method of a solid carboxylic acid type water reducing agent, which comprises the following steps: s1, concentrating and drying: taking a carboxylic acid type water reducing agent mother liquor, passing through an ultrafiltration membrane with the diameter of 2-10nm at the temperature of 30-40 ℃ and under the pressure of 0.5-1MPa, taking trapped concentrated solution, and drying the concentrated solution at the temperature of 30-35 ℃ by an air dryer until the water content is less than or equal to 3%; s2, granulating: uniformly stirring the product obtained in the step S1, and preparing the product into 100-140-mesh granules through a granulator; s3, pelleting: putting the particles obtained in the step S2 into a spherical shot blasting machine to prepare a shot core; s4, coating: and putting the pellet core into a coating machine, spraying inorganic coating material liquid, and drying to obtain a finished product of the solid carboxylic acid type water reducing agent. According to the invention, the solid carboxylic acid type water reducing agent is subjected to coating treatment, so that the contact between the water reducing agent and the outside is avoided, the solid carboxylic acid type water reducing agent is not easy to damp and sticky, the dispersibility is good, and the transportation cost is reduced.
Description
Technical Field
The invention belongs to the technical field of concrete admixtures, and particularly relates to a preparation method and an application method of a solid carboxylic acid type water reducing agent.
Background
The water reducing agent is a concrete admixture capable of reducing the mixing water consumption under the condition of maintaining the slump constant of concrete. Most of the anionic surfactants belong to the following components: lignosulphonates, polycyclic aromatic salts, and water-soluble resin sulphonates. After the water reducing agent is added into the concrete mixture, the water reducing agent has a dispersing effect on cement particles, can improve the workability of the concrete mixture, reduce the unit water consumption and improve the fluidity of the concrete mixture; or the unit cement consumption is reduced, and the cement is saved.
Several water reducing agents commonly used in the current market are: sodium lignosulfonate water reducing agent, naphthalene high-efficiency water reducing agent, aliphatic high-efficiency water reducing agent, amino high-efficiency water reducing agent, polycarboxylic acid high-efficiency water reducing agent and the like. The polycarboxylic acid type water reducing agent belongs to a new generation high-performance water reducing agent, and is a concrete water reducing agent with high technological content, good application prospect and better comprehensive performance at the world front edge at present. Most of the polycarboxylic acid type water reducing agents on the market are used in a liquid form, and the packaging cost and the transportation cost are high, so that the solid polycarboxylic acid type water reducing agent is an effective method for reducing the transportation cost.
The existing powder polycarboxylic acid type water reducing agent is prepared by spray drying, but the polycarboxylic acid type water reducing agent has very good affinity with water, a grafted polyoxyethylene side chain in a molecule forms a hydrogen bond with water molecules in an aqueous solution, so that the polycarboxylic acid type water reducing agent has very good water retention property, and a solid polycarboxylic acid type water reducing agent is melted at about 45 ℃, so that the polycarboxylic acid type water reducing agent is easy to damp and sticky, has poor dispersibility and influences transportation, so that an anticaking agent must be added in the spray drying, but the anticaking agent influences the solubility of a product, and is not beneficial to forming liquid again after long-distance transportation.
In summary, how to design a solid carboxylic acid type water reducing agent is not sticky easily, has good dispersibility, reduces transportation cost, and has good solubility after being formed into liquid again is a problem which needs to be solved urgently at present.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for producing a solid carboxylic acid type water reducing agent which is less likely to be sticky, has good dispersibility, can reduce transportation costs, and has good solubility after being reconstituted into a liquid, and a method for using the same.
The invention realizes the aim through the following technical scheme, and the preparation method of the solid carboxylic acid type water reducing agent comprises the following steps:
s1, concentrating and drying: taking a carboxylic acid type water reducing agent mother liquor, passing through an ultrafiltration membrane with the diameter of 2-10nm at the temperature of 30-40 ℃ and under the pressure of 0.5-1MPa, taking trapped concentrated solution, and drying the concentrated solution at the temperature of 30-35 ℃ by an air dryer until the water content is less than or equal to 3%;
s2, granulating: uniformly stirring the product obtained in the step S1, and preparing the product into 100-140-mesh granules through a granulator;
s3, pelleting: putting the particles obtained in the step S2 into a spherical shot blasting machine to prepare a shot core;
s4, coating: and putting the pellet core into a coating machine, spraying inorganic coating material liquid, and drying to obtain a finished product of the solid carboxylic acid type water reducing agent.
Further, the mass ratio of the pellet core to the inorganic coating material is 1: (0.05-0.1).
Further, the inorganic coating material comprises 15-30% of copper oxide-phosphoric acid glue and 70-85% of modified microporous ceramic.
Further, the preparation method of the modified microporous ceramic comprises the following steps: taking the microporous ceramic, passing through a crusher under the conditions of temperature of 100-120 ℃ and temperature of 400-500r/min, drying, passing through a sieve of 200-400 meshes, removing impurities from the obtained microporous ceramic powder through a cyclone processor, introducing the microporous ceramic powder and 0.1-0.3 times of starch into a high-shear dispersion machine, and dispersing for 0.5-1h under the conditions of temperature of 60-80 ℃ and rotational speed of 9000-10000r/min to obtain a finished product.
An application method of a solid carboxylic acid type water reducing agent comprises the following steps:
(1) treating the prepared solid carboxylic acid type water reducing agent in a humidifier at the temperature of 80-90 ℃ for 30-60min, then putting the solid carboxylic acid type water reducing agent into a closed container at the temperature of 20-40 ℃ for 2-3h, then putting the solid carboxylic acid type water reducing agent into a high-speed stirrer at the temperature of-10-0 ℃ and at the temperature of 800-;
(2) pulverizing the sieved material obtained in step (1) into 0.1-0.3 μm powder by a closed superfine pulverizer at 20-30 deg.C and 10000-;
(3) adding the powder obtained in the step (2) into the cementing material according to the mixing amount of 0.08-0.15%, and mixing with water for use.
Further, the high-speed stirrer in the step (1) is filled with steel balls with the diameter of 0.15-1 mm.
The invention has the beneficial effects that:
(1) according to the invention, the solid carboxylic acid type water reducing agent is subjected to coating treatment, so that the contact of the water reducing agent and the outside is avoided, the solid carboxylic acid type water reducing agent is not easy to damp and sticky, the dispersibility is good, and the transportation cost is reduced;
(2) the coating material adopts copper oxide-phosphoric acid glue as a binder, has larger brittleness, small bonding strength and easy breakage, the modified microporous ceramic has a porous structure, and after starch is introduced, the modified microporous ceramic absorbs water and is easy to expand, so that the coating prepared from the inorganic coating material has large brittleness and porous inside and is easy to absorb water and disintegrate, the temperature is rapidly reduced after humidification before the product is used, the starch in the coating expands after absorbing water, and the water in the coating is frozen at low temperature to cause the overall expansion of the coating, and the binder copper oxide-phosphoric acid glue has large brittleness, so that the coating is finally disintegrated into fragments and sieved to remove the coating, thereby using the water reducing agent in the coating;
(3) the solid carboxylic acid type water reducing agent prepared by the invention can remove the coating in application, so that the solid carboxylic acid type water reducing agent is not influenced by the coating material when being formed into liquid again, and the solubility is good.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 1
The embodiment provides a preparation method of a solid carboxylic acid type water reducing agent, which comprises the following steps:
s1, concentrating and drying: taking a carboxylic acid type water reducing agent mother liquor, passing through a 2nm ultrafiltration membrane at 30 ℃ and 0.5MPa, taking trapped concentrated solution, and drying the concentrated solution at 30 ℃ by an air dryer until the water content is less than or equal to 3%;
s2, granulating: uniformly stirring the product obtained in the step S1, and preparing the product into 100-mesh granules through a granulator;
s3, pelleting: putting the particles obtained in the step S2 into a spherical shot blasting machine to prepare a shot core;
s4, coating: and putting the pellet core into a coating machine, spraying inorganic coating material liquid, and drying to obtain a finished product of the solid carboxylic acid type water reducing agent.
The mass ratio of the pellet core to the inorganic coating material is 1: 0.05.
the inorganic coating material comprises 15% of copper oxide-phosphoric acid glue and 85% of modified microporous ceramic.
The preparation method of the modified microporous ceramic comprises the following steps: taking microporous ceramic, passing through a pulverizer at 100 ℃ and 400r/min, drying, sieving with a 200-mesh sieve, removing impurities from the obtained microporous ceramic powder by a cyclone processor, introducing the microporous ceramic powder and 0.1 time of starch into a high-shear dispersing machine, and dispersing for 0.5h at 60 ℃ and 9000r/min of rotation speed to obtain a finished product.
The embodiment also provides an application method of the solid carboxylic acid type water reducing agent, which comprises the following steps:
(1) treating the prepared solid carboxylic acid type water reducing agent in a humidifier at 80 ℃ for 30min, then putting the solid carboxylic acid type water reducing agent into a closed container at-20 ℃ for 2h, then putting the closed container into a high-speed stirrer at-10 ℃ and 800r/min for stirring for 1h, and then sieving the mixture by a 120-mesh sieve to obtain a sieved substance;
(2) pulverizing the sieved material obtained in step (1) into 0.1 μm powder by a closed superfine pulverizer at 20 deg.C and 10000 r/min;
(3) adding the powder obtained in the step (2) into a cementing material according to the mixing amount of 0.08%, and mixing with water for use.
And (2) filling steel balls with the diameter of 0.15 into the high-speed stirrer in the step (1).
Example 2
The embodiment provides a preparation method of a solid carboxylic acid type water reducing agent, which comprises the following steps:
s1, concentrating and drying: taking a carboxylic acid type water reducing agent mother liquor, passing through a 6nm ultrafiltration membrane at 35 ℃ and 0.7MPa, taking trapped concentrated solution, and drying the concentrated solution at 32 ℃ by an air dryer until the water content is less than or equal to 3%;
s2, granulating: uniformly stirring the product obtained in the step S1, and preparing the product into 120-mesh granules through a granulator;
s3, pelleting: putting the particles obtained in the step S2 into a spherical shot blasting machine to prepare a shot core;
s4, coating: and putting the pellet core into a coating machine, spraying inorganic coating material liquid, and drying to obtain a finished product of the solid carboxylic acid type water reducing agent.
The mass ratio of the pellet core to the inorganic coating material is 1: 0.07.
the inorganic coating material comprises 22% of copper oxide-phosphoric acid glue and 78% of modified microporous ceramic.
The preparation method of the modified microporous ceramic comprises the following steps: taking microporous ceramic, passing through a pulverizer at the temperature of 110 ℃ and the rotating speed of 450r/min, drying, sieving with a 300-mesh sieve, removing impurities from the obtained microporous ceramic powder by a cyclone processor, introducing the microporous ceramic powder and 0.2 times of starch into a high-shear dispersing machine, and dispersing for 0.7h at the temperature of 70 ℃ and the rotating speed of 9500r/min to obtain a finished product.
The embodiment also provides an application method of the solid carboxylic acid type water reducing agent, which comprises the following steps:
(1) treating the prepared solid carboxylic acid type water reducing agent in a humidifier at 85 ℃ for 45min, then putting the solid carboxylic acid type water reducing agent into a closed container at-30 ℃ for 2.5h, then putting the solid carboxylic acid type water reducing agent into a high-speed stirrer at-5 ℃ and 900r/min for stirring for 1.5h, and then sieving the solid carboxylic acid type water reducing agent by a 140-mesh sieve to obtain a sieved substance;
(2) pulverizing the sieved material obtained in step (1) into 0.2 μm powder by a closed superfine pulverizer at 25 deg.C and 12000 r/min;
(3) adding the powder obtained in the step (2) into the cementing material according to the mixing amount of 0.12%, and mixing with water for use.
And (2) filling steel balls with the diameter of 0.5mm into the high-speed stirrer in the step (1).
Example 3
The embodiment provides a preparation method of a solid carboxylic acid type water reducing agent, which comprises the following steps:
s1, concentrating and drying: taking a carboxylic acid type water reducing agent mother liquor, passing through a 10nm ultrafiltration membrane at 40 ℃ and 1MPa, taking an intercepted concentrated solution, and drying the concentrated solution at 35 ℃ by an air dryer until the water content is less than or equal to 3%;
s2, granulating: uniformly stirring the product obtained in the step S1, and preparing the product into 140-mesh granules through a granulator;
s3, pelleting: putting the particles obtained in the step S2 into a spherical shot blasting machine to prepare a shot core;
s4, coating: and putting the pellet core into a coating machine, spraying inorganic coating material liquid, and drying to obtain a finished product of the solid carboxylic acid type water reducing agent.
The mass ratio of the pellet core to the inorganic coating material is 1: 0.1.
the inorganic coating material comprises 30% of copper oxide-phosphoric acid glue and 70% of modified microporous ceramic.
The preparation method of the modified microporous ceramic comprises the following steps: taking microporous ceramic, passing through a pulverizer at 120 ℃ and 500r/min, drying, sieving with a 400-mesh sieve, removing impurities from the obtained microporous ceramic powder by a cyclone processor, introducing the microporous ceramic powder and 0.3 times of starch into a high-shear disperser, and dispersing for 1h at 80 ℃ and 10000r/min rotation speed to obtain a finished product.
The embodiment also provides an application method of the solid carboxylic acid type water reducing agent, which comprises the following steps:
(1) treating the prepared solid carboxylic acid type water reducing agent in a humidifier at 90 ℃ for 60min, then putting the solid carboxylic acid type water reducing agent into a closed container at-40 ℃ for 3h, then putting the closed container into a high-speed stirrer at 0 ℃ and 1000r/min for stirring for 2h, and then sieving the mixture by a 170-mesh sieve to obtain a sieved substance;
(2) pulverizing the sieved material obtained in step (1) into 0.3 μm powder by a closed superfine pulverizer at 30 deg.C and 15000 r/min;
(3) adding the powder obtained in the step (2) into the cementing material according to the mixing amount of 0.15%, and mixing with water for use.
And (2) filling steel balls with the diameter of 1mm into the high-speed stirrer in the step (1).
Comparative example 1
The comparative example provides a preparation method of a solid carboxylic acid type water reducing agent, which is different from the preparation method of example 1 in that the method comprises the following steps: concentrating and drying: taking the mother liquor of the carboxylic acid type water reducing agent, passing through a 2nm ultrafiltration membrane at 30 ℃ and 0.5MPa, taking the trapped concentrated solution, and drying the concentrated solution at 30 ℃ by an air dryer until the water content is less than or equal to 3 percent to obtain the finished product.
Comparative example 2
The comparative example provides a preparation method of a solid carboxylic acid type water reducing agent, and is different from the preparation method of example 2 in that the coating material is copper oxide-phosphoric acid glue and waterborne polyurethane.
Comparative example 3
The comparative example provides a preparation method of a solid carboxylic acid type water reducing agent, and is different from the preparation method of example 2 in that the coating material is copper oxide-phosphoric acid glue and polyethylene glycol.
Comparative example 4
The comparative example provides an application method of a solid carboxylic acid type water reducing agent, which is different from the example 3 in that the step (1) is changed into the following steps: putting the prepared solid carboxylic acid type water reducing agent into a closed container at the temperature of minus 40 ℃ for 3 hours, then putting the solid carboxylic acid type water reducing agent into a high-speed stirrer at the temperature of 0 ℃ and 1000r/min for stirring for 2 hours, and then sieving the solid carboxylic acid type water reducing agent by a 170-mesh sieve to obtain a sieved substance.
Comparative example 5
The comparative example provides an application method of a solid carboxylic acid type water reducing agent, which is different from the example 3 in that the step (1) is changed into the following steps: treating the prepared solid carboxylic acid type water reducing agent in a humidifier at 90 ℃ for 60min, adding the solid carboxylic acid type water reducing agent into a high-speed stirrer at 0 ℃ and 1000r/min, stirring for 2h, and sieving with a 170-mesh sieve to obtain a sieved substance.
Comparative example 6
The comparative example provides an application method of a solid carboxylic acid type water reducing agent, which is different from the example 3 in that the application method comprises the following steps:
(1) pulverizing the prepared solid carboxylic acid type water reducing agent into 0.3 μm powder by a closed superfine pulverizer at 30 deg.C and 15000 r/min;
(3) adding the powder obtained in the step (2) into the cementing material according to the mixing amount of 0.15%, and mixing with water for use.
Comparative example 7
The comparative example provides a preparation method of a solid carboxylic acid type water reducing agent, which is different from the preparation method of example 3 in that the inorganic coating material comprises 30% of copper oxide-phosphoric acid glue and 70% of microporous ceramic.
The preparation method of the microporous ceramic comprises the following steps: taking microporous ceramic, passing through a pulverizer at 120 ℃ and 500r/min, drying, sieving with a 400-mesh sieve, removing impurities from the obtained microporous ceramic powder by a cyclone processor, introducing into a high-shear disperser, and dispersing at 80 ℃ and 10000r/min for 1h to obtain the finished product.
Comparative example 8
The comparative example provides a preparation method of a solid carboxylic acid type water reducing agent, which is different from the preparation method of the example 3 in that the inorganic coating material comprises 10% of copper oxide-phosphoric acid glue and 90% of modified microporous ceramic.
Comparative example 9
The comparative example provides a preparation method of a solid carboxylic acid type water reducing agent, which is different from the preparation method of example 3 in that the inorganic coating material comprises 40% of copper oxide-phosphoric acid glue and 60% of modified microporous ceramic.
Comparative example 10
This comparative example provides a method for producing a solid carboxylic acid type water reducing agent, which is different from example 3 in that the modified microporous ceramic is produced from a microporous ceramic and 0.05 times the amount of starch.
Comparative example 11
This comparative example provides a method for producing a solid carboxylic acid type water reducing agent, which is different from example 3 in that the modified microporous ceramic is produced from a microporous ceramic and 0.4 times the amount of starch.
Comparative example 12
The comparative example provides a preparation method of a solid carboxylic acid type water reducing agent, which is different from the preparation method of example 3 in that the preparation method of the modified microporous ceramic comprises the following steps: taking microporous ceramic and 0.3 times of starch, passing through a pulverizer at 120 ℃ and 500r/min, drying, sieving with a 400-mesh sieve, removing impurities from the obtained product by a cyclone processor, introducing into a high-shear disperser, and dispersing at 80 ℃ and 10000r/min of rotation speed for 1h to obtain the finished product.
Property analysis of solid carboxylic acid type water reducing agent
10Kg of the water reducing agents obtained in examples 1 to 3 and comparative examples 1 to 3, and a commercially available carboxylic acid type water reducing agent as a powder were weighed and placed in a container of the same specification at room temperature, and the behavior of the product was observed as a function of the standing time, and the results are shown in Table 1:
as can be seen from the results in Table 1, the solid carboxylic acid type water reducing agent prepared by the invention is not easy to damp and stick, has good dispersibility, and provides a good foundation for transportation and storage of materials.
Secondly, performance detection result of water reducing agent
The water reducing agents prepared in examples 1 to 3 and comparative examples 1 to 6 and the commercially available powder carboxylic acid type water reducing agent were added to the standard concrete according to the corresponding application methods in an amount of 0.1 to 0.25% (in terms of the amount of concrete) of the water reducing agent, and the performance test was carried out, respectively, according to GB 8076-:
from the results in table 2, it can be seen that the performance test data of the solid carboxylic acid type water reducing agent prepared by the present invention is equivalent to that of the carboxylic acid type water reducing agent mother liquor, which indicates that the solid carboxylic acid type water reducing agent obtained by the processing method of the present invention is equivalent to that of the liquid. And according to the application method of the solid carboxylic acid type water reducing agent provided by the invention, the excellent water reducing performance of the product can be maintained.
Solubility analysis of solid carboxylic acid type Water reducing agent
Taking 50g of the water reducing agent prepared in the examples 1-3 and the comparative examples 1-3, removing the coating according to the application method provided by the invention, dissolving in 500mL of distilled water at normal temperature, stirring for 10min, and observing the dissolution condition of the product; separately, 50g of a commercially available carboxylic acid type water reducing agent in powder form was dissolved in 500mL of distilled water at normal temperature, and the dissolution of the product was observed after stirring for 10min, and the results are shown in Table 3 below:
from the results in Table 3, it is understood that the solid carboxylic acid type water reducing agent prepared by the present invention has better solubility after being reconstituted than the commercially available powdery carboxylic acid type water reducing agent, and does not affect the use thereof.
Application of tetra-solid carboxylic acid type water reducing agent in highway grouting agent
In the same formulation, the solid carboxylic acid type water reducing agent prepared in examples 1 to 3 and comparative examples 1 to 3 and 7 to 12 and the commercially available powdered carboxylic acid type water reducing agent were used to prepare a road grouting agent, and the test results were as follows:
the results in Table 4 show that the solid carboxylic acid type water reducing agent prepared by the invention has good application effect in the highway grouting agent and has no obvious retardation.
The invention has the beneficial effects that: according to the invention, the solid carboxylic acid type water reducing agent is subjected to coating treatment, so that the contact between the water reducing agent and the outside is avoided, the solid carboxylic acid type water reducing agent is not easy to damp and sticky, the dispersibility is good, and the transportation cost is reduced.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features thereof can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A preparation method of a solid carboxylic acid type water reducing agent is characterized by comprising the following steps: the method comprises the following steps:
s1, concentrating and drying: taking a carboxylic acid type water reducing agent mother liquor, passing through an ultrafiltration membrane with the diameter of 2-10nm at the temperature of 30-40 ℃ and under the pressure of 0.5-1MPa, taking trapped concentrated solution, and drying the concentrated solution at the temperature of 30-35 ℃ by an air dryer until the water content is less than or equal to 3%;
s2, granulating: uniformly stirring the product obtained in the step S1, and preparing the product into 100-140-mesh granules through a granulator;
s3, pelleting: putting the particles obtained in the step S2 into a spherical shot blasting machine to prepare a shot core;
s4, coating: putting the pellet core into a coating machine, spraying inorganic coating material liquid, and drying to obtain a finished product of the solid carboxylic acid type water reducing agent;
the mass ratio of the pellet core to the inorganic coating material is 1: (0.05-0.1);
the inorganic coating material comprises 15-30% of copper oxide-phosphoric acid glue and 70-85% of modified microporous ceramic.
2. The method for producing a solid carboxylic acid type water-reducing agent according to claim 1, characterized in that: the preparation method of the modified microporous ceramic comprises the following steps: taking the microporous ceramic, passing through a crusher under the conditions of temperature of 100-120 ℃ and temperature of 400-500r/min, drying, passing through a sieve of 200-400 meshes, removing impurities from the obtained microporous ceramic powder through a cyclone processor, introducing the microporous ceramic powder and 0.1-0.3 times of starch into a high-shear dispersion machine, and dispersing for 0.5-1h under the conditions of temperature of 60-80 ℃ and rotational speed of 9000-10000r/min to obtain a finished product.
3. The application method of the solid carboxylic acid type water reducing agent according to claim 1, characterized in that: the method comprises the following steps:
(1) treating the prepared solid carboxylic acid type water reducing agent in a humidifier at the temperature of 80-90 ℃ for 30-60min, then putting the solid carboxylic acid type water reducing agent into a closed container at the temperature of 20-40 ℃ for 2-3h, then putting the solid carboxylic acid type water reducing agent into a high-speed stirrer at the temperature of-10-0 ℃ and at the temperature of 800-;
(2) pulverizing the sieved material obtained in step (1) into 0.1-0.3 μm powder by a closed superfine pulverizer at 20-30 deg.C and 10000-;
(3) adding the powder obtained in the step (2) into the cementing material according to the mixing amount of 0.08-0.15%, and mixing with water for use.
4. The method for applying the solid carboxylic acid type water reducing agent according to claim 3, characterized in that: and (2) filling steel balls with the diameter of 0.15-1mm into the high-speed stirrer in the step (1).
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| CN105061689A (en) * | 2015-07-17 | 2015-11-18 | 北京市建筑工程研究院有限责任公司 | Preparation method of powdery polycarboxylic acid high-performance water reducing agent |
| CN108249812A (en) * | 2018-03-14 | 2018-07-06 | 洛阳理工学院 | A kind of slow-release solid water-reducing agent based on haydite and preparation method thereof |
| CN110372304A (en) * | 2019-08-15 | 2019-10-25 | 重庆市万闸防汛器材有限责任公司 | One kind exempting from pressure and steams PHC tubular pile concrete |
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