CN116081973A - Concrete retarding water reducer and preparation method thereof - Google Patents
Concrete retarding water reducer and preparation method thereof Download PDFInfo
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- CN116081973A CN116081973A CN202310028500.5A CN202310028500A CN116081973A CN 116081973 A CN116081973 A CN 116081973A CN 202310028500 A CN202310028500 A CN 202310028500A CN 116081973 A CN116081973 A CN 116081973A
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- concrete
- water reducer
- retarding water
- concrete retarding
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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
-
- 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
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
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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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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 concrete retarding water reducer, which comprises the following components: polycarboxylate water reducer mother liquor, zirconium polychloride, aromatic polyamide fibers and ferric sulfate. The invention also discloses a preparation method of the retarding water reducer, which comprises the steps of adding ionized water, zirconium polychloride, sodium polyaspartate and coco diethanolamide in a specific proportion to form modified zirconium polychloride, and then adding other additives. The method has the advantages of improving the compactness of the concrete retarder, saving cement, improving the working performance of the concrete, improving the strength and durability of the concrete, and finally obtaining the concrete retarder through the mixed solution of the initiator, the polycarboxylate superplasticizer mother liquor, the aromatic polyamide fiber, the ferric sulfate, the initiator and the chain transfer agent, adjusting the setting time of the concrete, and also reducing the slump loss of the concrete and improving the adaptability and the green environmental protection of the product.
Description
Technical Field
The invention belongs to the technical field of concrete additives, and particularly relates to a concrete retarding water reducer and a preparation method of the retarding water reducer.
Background
At present, commercial concrete and pumping construction technology are mostly adopted for concrete. Commercial concrete is also called concentrated stirring concrete, namely, the concrete stirred by the traditional site construction site is concentrated to be provided with a stirring station, the concrete stirred by the stirring station is transported to the construction site by a stirring transport vehicle, and is transported to the construction level of a building by a pump truck through a pump pipe, if retarding treatment is not carried out, particularly in summer high-temperature weather, moisture is quickly volatilized, even the concrete is not transported to the construction site, the concrete is started to be coagulated and hardened and cannot be used, and retarder is needed to be added when the concrete is stirred so as to delay the coagulation and hardening time of the concrete. The action mechanism is as follows: after the retarder and the water reducer are mixed into concrete, cement particles are negatively charged due to the adsorption of anions of the water reducer, so that water around the cement particles is polar, like ions repel each other, mutual approaching of cement cations is prevented, and a dispersing and separating effect is caused, so that the adsorption and dispersing effects of the cement particles are improved, the coagulation tendency of cement paste is inhibited, the junction area of the cement particles and the water is increased, and cement can be fully hydrated. In the process of dispersing cement particles, free water surrounded by the aggregate is discharged, and cement paste is changed into a sol structure from a netlike aggregate structure, so that the slurry becomes thin, the concrete fluidity is large, the retarding time is long, and the high-performance water reducer has high dispersing effect on cement, and can better maintain the concrete brightness. The admixture can be permeated into the concrete to make the concrete have high performance, and the high-strength and high-performance concrete can be obtained.
The conventional water reducing agents mainly comprise zirconium polychloride water reducing agents, naphthalene water reducing agents and polycarboxylic acid water reducing agents, the polycarboxylic acid water reducing agents have the problem of compatibility with cement in actual concrete engineering use, the use effect of the polycarboxylic acid water reducing agents is greatly influenced by cement components, particularly when the polycarboxylic acid water reducing agents contain clay and other components, the influence on the water reducing and dispersing performance of the polycarboxylic acid water reducing agents is serious due to the interlayer adsorption effect of the clay, the working performance of concrete is reduced, and the wide application and development of the polycarboxylic acid water reducing agents are restricted.
Disclosure of Invention
The invention mainly aims to provide a concrete retarding water reducer, which solves the problems that the existing concrete setting time cannot be controlled and the compressive strength of the concrete is affected.
The invention also aims to provide a preparation method of the concrete retarding water reducer, which solves the problems that the existing retarding water reducer is difficult to improve the working performance of concrete and the requirements of improving the strength and the durability of concrete.
In order to achieve the above purpose, the first technical scheme adopted by the invention is as follows: the concrete retarding water reducer comprises the following components: polycarboxylate water reducer mother liquor, zirconium polychloride, aromatic polyamide fibers and ferric sulfate.
Further, the components are respectively as follows according to the mass ratio: 20-40 parts of polycarboxylate water reducer mother liquor, 30-50 parts of zirconium polychloride, 40-80 parts of aromatic polyamide fiber and 50-100 parts of ferric sulfate.
Further, the concrete retarding water reducer further comprises the following components: an initiator.
Further, the concrete retarding water reducer further comprises the following components: retarder.
Further, the concrete retarding water reducer further comprises the following components: chain transfer agent.
Further, the concrete retarding water reducer further comprises the following components: deionized water.
Further, the concrete retarding water reducer further comprises the following components: a phosphoric acid slow release agent.
Further, the concrete retarding water reducer further comprises the following components: coconut diethanolamide.
Further, the concrete retarding water reducer further comprises the following components: sodium polyaspartate.
The second technical scheme adopted by the invention is as follows: the preparation method of the concrete retarding water reducer comprises the following steps: adding deionized water, zirconium polychloride, sodium polyaspartate and cocoanut diethanolamide into a reaction container, mixing at 120-140 ℃ for 30-90min to form colloid, then placing in an environment of-2-0 ℃ for sealing and standing for 30-60min to form solid, then crushing into particles with the particle size of 3-10 microns to obtain modified zirconium polychloride, adding an initiator into the modified zirconium polychloride, dripping a polycarboxylate superplasticizer mother solution, aromatic polyamide fibers and ferric sulfate, simultaneously dripping a mixed solution of the initiator and a chain transfer agent, preserving heat and stirring for reacting for 2-4h, and dripping an alkali solution to adjust the pH value to 6-8 after the reaction is finished to obtain the concrete retarding water reducer.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the modified poly zirconium chloride is formed by adding the ionized water, the poly zirconium chloride, the sodium polyaspartate and the cocoanut diethanol amide in a specific proportion, so that the compactness of the concrete retarding water reducer is improved, the cement is saved, the working performance of the concrete is improved, the strength and the durability of the concrete are improved, the concrete retarding water reducer is finally obtained by mixing the initiator, the mother solution of the poly carboxylic acid water reducer, the aromatic polyamide fiber, the ferric sulfate, the initiator and the chain transfer agent, the setting time of the concrete is adjusted, the slump loss of the concrete can be slowed down, and the adaptability of the product is improved, and the environment-friendly characteristic is realized.
Detailed Description
The invention discloses a concrete retarding water reducer, which comprises the following components: polycarboxylate water reducer mother liquor, zirconium polychloride, aromatic polyamide fibers and ferric sulfate.
According to the invention, the specific polycarboxylate water reducer mother liquor, the aromatic polyamide fiber and the ferric sulfate are selected for reaction, so that the stability of the retarding effect of the retarding water reducer obtained by the reaction is improved better, the retarding time of the concrete added with the retarding water reducer is less affected by the material and the temperature of the concrete, the retarding time of the concrete is better stabilized in a certain range, and the construction time of the reinforced concrete pile is easier to control.
Preferably, the components are respectively as follows according to the mass ratio: 20-40 parts of polycarboxylate water reducer mother liquor, 30-50 parts of zirconium polychloride, 40-80 parts of aromatic polyamide fibers, 50-100 parts of ferric sulfate and 200-250 parts of deionized water.
Furthermore, in order to change the color of the concrete retarding water reducer and inhibit bacterial growth, 70-100 parts of initiator is added into the concrete retarding water reducer. Illustratively, the initiator is a mixture of ammonium persulfate and sodium bisulfite, and the mass ratio is ammonium sulfate: sodium bisulfite=1: 1 to 2.
Further, in order to achieve better dehydration effect and corrosion prevention effect, the concrete retarder is further added with 50-100 parts of retarder, and the retarder is at least one of zinc chloride, zinc sulfate, zinc carbonate and zinc nitrate.
Further, in order to improve the viscosity of the concrete retarder and improve the thermal stability, a chain transfer agent is further added in the concrete retarder, and a specific initiator and the chain transfer agent are selected for reaction, so that the reaction is better promoted, the retarder time of the concrete added with the retarder is less affected by the material and the temperature of the concrete, and the construction time of the reinforced concrete pile is better controlled. Illustratively, 20-40 parts of a chain transfer agent, which is one of mercaptopropionic acid and sodium hypophosphite.
Furthermore, deionized water is added into the setting retarder water reducer to meet the environmental protection and safety requirements. Specifically, deionized water is 200-250 parts.
Further, in order to improve the stability of the concrete setting water reducer and the formation efficiency of the concrete setting water reducer, a phosphoric acid slow-release agent is also added in the concrete setting water reducer. The setting retarder is characterized in that the setting retarder is added to the concrete, so that the setting retarder is not easily influenced by the material and the temperature of the concrete, the compressive strength of the concrete is not easily influenced by the setting retarder, and the situation that the concrete cannot be finally set is favorably reduced. The phosphoric acid slow release agent is prepared by mixing 10-30 parts by mass of urea, phosphorous acid, formaldehyde and polytetrafluoroethylene, wherein the mass ratio of the urea is as follows: phosphorous acid: formaldehyde: polytetrafluoroethylene=1:1.5:1:0.5.
Furthermore, in order to improve the strength and durability of the concrete, the concrete has excellent slump retention, higher water reducing rate and improved concrete performance, and cocoanut diethanolamide is also added into the concrete retarder. In particular to 10-100 parts of coconut diethanolamide.
Further, in order to improve the matching effect of the modified zirconium polychloride, the compressive strength of the concrete can meet the standard requirements more easily, the construction of the reinforced concrete pile is simpler, and the sodium polyaspartate is added in the concrete retarding water reducer. Illustratively, the sodium polyaspartate is 50-200 parts.
Specifically, the concrete retarding water reducer of the invention has at least the following advantages:
1. according to the invention, the semipermeable membrane formed by adding the aromatic polyamide fibers is used for delaying the release and diffusion of the polycarboxylate water reducer mother liquor, so that the effects of prolonging the action time of the water reducer and improving the dispersion retention are realized;
2. the invention has good workability, high strength, good crack resistance, good impermeability and long service life, and has good economic and social benefits;
3. according to the initiator and the chain transfer agent, the molecular chain structure of the water reducing agent is increased under the action of the initiator and the chain transfer agent, phosphate is grafted on the main chain of the water reducing agent, the combination is firm, the water reducing agent molecule has the characteristic of a phosphate functional group, the workability and the fluidity of cement concrete are effectively improved, the concrete structure is improved, and the strength is improved.
4. The deionized water is used for stirring, so that the method is safe and environment-friendly;
5. the invention has the advantages of easily available raw materials and low cost;
6. according to the invention, by adding the zirconium polychloride, the retarding water reducer has good water reducing, reinforcing and cracking preventing effects.
The invention also discloses a preparation method of the concrete retarding water reducer, which specifically comprises the following steps: the method comprises the following steps: adding deionized water, zirconium polychloride, sodium polyaspartate and cocoanut diethanolamide into a reaction container, mixing at 120-140 ℃ for 30-90min to form colloid, then placing in an environment of-2-0 ℃ for sealing and standing for 30-60min to form solid, then crushing into particles with the particle size of 3-10 microns to obtain modified zirconium polychloride, adding an initiator into the modified zirconium polychloride, dripping a polycarboxylate superplasticizer mother solution, aromatic polyamide fibers and ferric sulfate, simultaneously dripping a mixed solution of the initiator and a chain transfer agent, preserving heat and stirring for reacting for 2-4h, and dripping an alkali solution to adjust the pH value to 6-8 after the reaction is finished to obtain the concrete retarding water reducer.
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment discloses a preparation method of a water concrete retarding water reducer, which specifically comprises the following steps:
200 parts of deionized water, 30 parts of zirconium polychloride, 60 parts of sodium polyaspartate and 20 parts of coconut diethanolamide are added into a four-neck flask with a stirrer and a thermometer according to the mass part ratio, the mixture is mixed for 50 minutes at the temperature of 55 ℃, the mixture is placed in an environment of-2-0 ℃ for sealing and standing for 30-60 minutes, the mixture is crushed into particles with the particle size of 3-10 microns, and then the modified zirconium polychloride is obtained, 70 parts of initiator is added into the modified zirconium polychloride, 25 parts of polycarboxylate superplasticizer mother liquor, 40 parts of aromatic polyamide fiber and 50 parts of ferric sulfate are dropwise added, meanwhile, 10 parts of mixed solution of the initiator and 20 parts of chain transfer agent are dropwise added, the mixture is kept warm and stirred for 2-4 hours, and after the reaction is finished, alkali solution is dropwise added to adjust the pH to 6-8, so that the concrete retarder is obtained.
Example 2
The embodiment discloses a preparation method of a water concrete retarding water reducer, which specifically comprises the following steps:
220 parts of deionized water, 30 parts of poly zirconium chloride, 70 parts of sodium polyaspartate and 40 parts of coco diethanol amide are added into a four-neck flask with a stirrer and a thermometer according to the mass part ratio, the mixture is mixed for 50 minutes at the temperature of 80 ℃, the mixture is placed in an environment of-2-1 ℃ for sealing and standing for 40-80 minutes, the mixture is crushed into particles with the particle size of 3-10 microns, the modified poly zirconium chloride is obtained, 80 parts of initiator is added into the modified poly zirconium chloride, 25 parts of polycarboxylate superplasticizer mother liquor, 30 parts of aromatic polyamide fiber and 60 parts of ferric sulfate are dropwise added, meanwhile, the mixed solution of 20 parts of initiator and 25 parts of chain transfer agent is also dropwise added, the mixture is kept warm and stirred for 3-5 hours, and after the reaction is finished, the pH is regulated to 6-8 by dropwise adding alkaline solution, so that the concrete retarder is obtained.
Example 3
Adding 240 parts of deionized water, 35 parts of poly zirconium chloride, 100 parts of sodium polyaspartate and 60 parts of coco diethanol amide into a four-neck flask with a stirrer and a thermometer according to the mass part ratio, mixing for 50 minutes at the temperature of 90 ℃, then placing the mixture in an environment of-1-1 ℃ for sealing and standing for 50-90 minutes, then crushing the mixture into particles with the particle size of 3-10 microns to obtain modified poly zirconium chloride, adding 85 parts of initiator into the modified poly zirconium chloride, dropwise adding 30 parts of polycarboxylate superplasticizer mother liquor, 40 parts of aromatic polyamide fiber and 70 parts of ferric sulfate, simultaneously dropwise adding a mixed solution of 30 parts of initiator and 30 parts of chain transfer agent, preserving heat and stirring for 3-5 hours, and dropwise adding alkaline solution to adjust the pH to 6-8 after the reaction is finished, thus obtaining the concrete retarding superplasticizer.
Example 4
The embodiment discloses a preparation method of a water concrete retarding water reducer, which specifically comprises the following steps:
adding 260 parts of deionized water, 45 parts of zirconium polychloride, 150 parts of sodium polyaspartate and 80 parts of coconut diethanolamide into a four-neck flask with a stirrer and a thermometer according to the mass part ratio, mixing at 90 ℃ for 50min, sealing and standing for 60-100min in an environment of 0-1 ℃, crushing into particles with the particle size of 3-10 microns to obtain modified zirconium polychloride, adding 85 parts of initiator into the modified zirconium polychloride, dropwise adding 30 parts of polycarboxylate superplasticizer mother solution, 60 parts of aromatic polyamide fibers and 80 parts of ferric sulfate, simultaneously dropwise adding a mixed solution of 20 parts of initiator and 20 parts of chain transfer agent, preserving heat and stirring for 3-5h, and dropwise adding alkaline solution to adjust the pH to 6-8 after the reaction is finished, thus obtaining the concrete retarding superplasticizer.
Example 5
The embodiment discloses a preparation method of a water concrete retarding water reducer, which specifically comprises the following steps:
adding 250 parts of deionized water, 55 parts of poly zirconium chloride, 200 parts of sodium polyaspartate and 100 parts of coconut diethanolamide according to the mass parts ratio into a four-neck flask with a stirrer and a thermometer, mixing at 120 ℃ for 50min, sealing and standing for 60-100min in an environment of-2-0 ℃, crushing into particles with the particle size of 3-10 microns to obtain modified poly zirconium chloride, adding 100 parts of initiator into the modified poly zirconium chloride, dropwise adding 40 parts of polycarboxylate superplasticizer mother liquor, 80 parts of aromatic polyamide fiber and 100 parts of ferric sulfate, simultaneously dropwise adding a mixed solution of 20 parts of initiator and 20 parts of chain transfer agent, preserving heat and stirring for 3-5h, and dropwise adding alkaline solution to adjust the pH to 6-8 after the reaction is finished, thus obtaining the concrete retarding superplasticizer.
According to the invention, the initiator and the chain transfer agent are added, so that the molecular chain structure of the water reducing agent is increased under the action of the initiator and the chain transfer agent, the workability and the fluidity of the cement concrete are effectively improved, the concrete structure is improved, the strength is improved, and the retarding effect is increased.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a concrete retarding water reducer which characterized in that: comprises the following components: polycarboxylate water reducer mother liquor, zirconium polychloride, aromatic polyamide fibers and ferric sulfate.
2. The concrete retarding water reducing agent according to claim 1, wherein: the components are respectively as follows according to the mass ratio: 20-40 parts of polycarboxylate water reducer mother liquor, 30-50 parts of zirconium polychloride, 11-19 parts of aromatic polyamide fiber and 3-4 parts of ferric sulfate.
3. A concrete retarding water reducing agent as claimed in claim 1 or claim 2, wherein: the concrete retarding water reducer further comprises the following components: an initiator.
4. A concrete retarding water reducing agent as claimed in claim 1 or claim 2, wherein: the concrete retarding water reducer further comprises the following components: retarder.
5. A concrete retarding water reducing agent as claimed in claim 1 or claim 2, wherein: the concrete retarding water reducer further comprises the following components: chain transfer agent.
6. A concrete retarding water reducing agent as claimed in claim 1 or claim 2, wherein: the concrete retarding water reducer further comprises the following components: deionized water.
7. A concrete retarding water reducing agent as claimed in claim 1 or claim 2, wherein: the concrete retarding water reducer further comprises the following components: a phosphoric acid slow release agent.
8. A concrete retarding water reducing agent as claimed in claim 1 or claim 2, wherein: the concrete retarding water reducer further comprises the following components: coconut diethanolamide.
9. A concrete retarding water reducing agent as claimed in claim 1 or claim 2, wherein: the concrete retarding water reducer further comprises the following components: sodium polyaspartate.
10. A preparation method of a concrete retarding water reducer is characterized by comprising the following steps: the method comprises the following steps: the method comprises the following steps: adding deionized water, zirconium polychloride, sodium polyaspartate and cocoanut diethanolamide into a reaction container, mixing at 120-140 ℃ for 30-90min to form colloid, then placing in an environment of-2-0 ℃ for sealing and standing for 30-60min to form solid, then crushing into particles with the particle size of 3-10 microns to obtain modified zirconium polychloride, adding an initiator into the modified zirconium polychloride, dripping a polycarboxylate superplasticizer mother solution, aromatic polyamide fibers and ferric sulfate, simultaneously dripping a mixed solution of the initiator and a chain transfer agent, preserving heat and stirring for reacting for 2-4h, and dripping an alkali solution to adjust the pH value to 6-8 after the reaction is finished to obtain the concrete retarding water reducer.
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| CN110386772A (en) * | 2019-08-05 | 2019-10-29 | 徐州巨龙新材料科技有限公司 | A kind of concrete retarding water-reducing agent |
| CN112592089A (en) * | 2020-12-10 | 2021-04-02 | 浙江波威新材料科技有限公司 | Retarding and water reducing agent for concrete |
| CN114230736A (en) * | 2022-01-04 | 2022-03-25 | 陈襄雨 | Efficient retarding and water reducing agent for cement concrete and preparation method thereof |
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2023
- 2023-01-09 CN CN202310028500.5A patent/CN116081973A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105601783A (en) * | 2016-01-27 | 2016-05-25 | 广东省建筑材料研究院 | Preparing method for mud stopping agent used for compound polycarboxylate superplasticizer |
| CN108706900A (en) * | 2018-05-02 | 2018-10-26 | 芜湖恒固混凝土材料有限公司 | A kind of compound retardation water reducing agent for concrete |
| CN110386772A (en) * | 2019-08-05 | 2019-10-29 | 徐州巨龙新材料科技有限公司 | A kind of concrete retarding water-reducing agent |
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