CN114230220A - Additive composition agent of liquid quick repairing material and application of additive composition agent in cement concrete - Google Patents
Additive composition agent of liquid quick repairing material and application of additive composition agent in cement concrete Download PDFInfo
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- CN114230220A CN114230220A CN202111678240.3A CN202111678240A CN114230220A CN 114230220 A CN114230220 A CN 114230220A CN 202111678240 A CN202111678240 A CN 202111678240A CN 114230220 A CN114230220 A CN 114230220A
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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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- 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)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an additive composition agent of a liquid quick repairing material and application thereof in cement concrete, comprising the following components: 200-300 parts of water, 20-30 parts of diethanolamine, 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate and 15-20 parts of magnesium oxide; the mixing mode of the components is as follows: heating water to 60-80 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide and other components, and stirring for 30-60 min; when the addition composition agent of the liquid rapid repair material is applied to cement concrete, the addition amount of the addition composition agent is 6-8% of the mass of the cement. According to the invention, the addition composition agent of the self-made liquid rapid repairing material is combined with other components, so that the hardening time of cement can be obviously shortened, and the strength of the cement can be enhanced; the method can be widely used for maintenance projects such as roads, bridges and tunnels, can be used for mass production, and has strong usability and moderate cost.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to an additive composition of a liquid quick repairing material and application of the additive composition in cement concrete.
Background
With the rapid development of economy in China, the method brings great progress to the traffic industry, and simultaneously, the requirements on the infrastructure of roads, bridges, tunnels and the like are higher and higher. In recent years, the traffic load is heavy, the traffic density is increased, and the driving speed is increased, so that the damage of some traffic facilities is accelerated, and the cement concrete infrastructure and maintenance work is more and more severe. The research on the rapid repairing material with excellent performance can bring great contribution to the society.
Conventional cement concrete repair materials can be classified into organic repair materials and inorganic repair materials. The organic patching material utilizes the polymer to improve the flexibility of the patching material and the bonding strength, and ensures the compatibility with a cement concrete base material because most of the organic patching material is composed of cement. Inorganic repair materials such as sulphoaluminate repair materials, aluminate repair materials, phosphate repair materials and the like are commonly used repair materials in engineering practice. Compared with organic repair materials, inorganic repair materials are low in cost and good in compatibility, but have the defects of large brittleness, large shrinkage rate, low bonding strength and the like, and long-term performance and durability are affected. Therefore, a fast repairing material with good durability, strong applicability and applicability in a short time is needed.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages in accordance with the present invention, there is provided an additive composition for a liquid rapid repair material, comprising the following components in parts by weight:
200-300 parts of water, 20-30 parts of diethanolamine, 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate and 15-20 parts of magnesium oxide.
Preferably, the food also comprises the following components in parts by weight: 3-6 parts of hydroxycarboxylic acid, 4-8 parts of glycerol and 40-60 parts of modified carbon nanofibers.
Preferably, the composition comprises the following components in parts by weight: 200 parts of water, 20 parts of diethanolamine, 260 parts of aluminum sulfate, 30 parts of ferric sulfate, 15 parts of lithium sulfate and 16 parts of magnesium oxide.
Preferably, the composition comprises the following components in parts by weight: 200 parts of water, 20 parts of diethanolamine, 260 parts of aluminum sulfate, 30 parts of ferric sulfate, 15 parts of lithium sulfate, 16 parts of magnesium oxide, 3 parts of hydroxycarboxylic acid, 4 parts of glycerol and 40 parts of modified carbon nanofibers.
Preferably, the preparation method of the modified carbon nanofiber comprises the following steps:
mixing a nitric acid solution with the mass fraction of 50-80% and a sulfuric acid solution with the mass fraction of 50-80%, and adding the carbon nanofibers into the mixed acid solution; placing the mixture in a microwave and ultrasonic wave integrated reactor, simultaneously starting microwaves and ultrasonic waves for synergistic treatment for 1-2 hours, wherein the microwave power is 120-300W, the ultrasonic power is 150-300W, the ultrasonic frequency is 30-35 KHz, and the temperature is 30-90 ℃; filtering out oxidized nano carbon fibers, washing, and centrifugally dewatering;
II, adding oxidized carbon nanofibers into N, N-dimethylformamide, magnetically stirring for 30-60 min at the temperature of 60-80 ℃ and the stirring speed of 300-800 rpm, adding a condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate, continuously stirring for 12-24 h in the absence of light, washing, and centrifuging to obtain the modified carbon nanofibers.
The mass ratio of the nitric acid to the sulfuric acid is 1: 3-5, the mass ratio of the carbon nanofibers to the mixed acid solution is 1: 50-100, and the mass ratio of the carbon nanofibers, the N, N-dimethylformamide and the condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate is 1: 80-100: 0.1-0.5.
Preferably, the mixing mode of the components is as follows: heating water to 60-80 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate and magnesium oxide, and stirring for 30-60 min.
Preferably, the mixing mode of the components is as follows: heating water to 60-80 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, hydroxycarboxylic acid, glycerol and modified carbon nanofibers, and performing double-frequency ultrasonic treatment for 30-60 min, wherein the frequency of double-frequency ultrasonic treatment is 30-35 kHz and 65-85 kHz respectively, and the power of each ultrasonic frequency is 300-400W.
Preferably, the amount of the added composition agent of the liquid quick repairing material is 6-8% of the mass of the cement; the cement is any one of portland cement, ordinary portland cement and composite portland cement.
The invention at least comprises the following beneficial effects: the invention relates to an additive composition agent of a liquid quick patching material and application thereof in cement concrete.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
The specific implementation mode is as follows:
the present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
< example 1>
An additive composition agent of a liquid quick repairing material and application thereof in cement concrete comprise:
weighing 2000g of water, 200g of diethanolamine, 2600g of aluminum sulfate, 300g of ferric sulfate, 150g of lithium sulfate and 160g of magnesium oxide;
heating water to 60 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate and magnesium oxide, and stirring for 30min to obtain an addition composition agent of the liquid rapid repair material;
mixing and stirring the additive composition agent of the liquid quick repairing mix and the portland cement, wherein the additive composition agent of the liquid quick repairing mix accounts for 6% of the mass of the portland cement; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 4.5min, and final setting time is 11.5 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 32.5MPa, and the 28d compressive strength ratio is 91.5 percent.
< example 2>
An additive composition agent of a liquid quick repairing material and application thereof in cement concrete comprise:
weighing 2500g of water, 250g of diethanolamine, 2600g of aluminum sulfate, 350g of ferric sulfate, 180g of lithium sulfate and 180g of magnesium oxide;
heating water to 60 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate and magnesium oxide, and stirring for 30min to obtain an addition composition agent of the liquid rapid repair material;
mixing and stirring the additive composition agent of the liquid quick repairing mix and the portland cement, wherein the additive composition agent of the liquid quick repairing mix accounts for 6% of the mass of the portland cement; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 4.6min, and final setting time is 11.8 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 32.8MPa, and the 28d compressive strength ratio is 91.7 percent.
< example 3>
An additive composition agent of a liquid quick repairing material and application thereof in cement concrete comprise:
step one, weighing 3000g of water, 300g of diethanolamine, 3000g of aluminum sulfate, 400g of ferric sulfate, 200g of lithium sulfate and 200g of magnesium oxide;
heating water to 60 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate and magnesium oxide, and stirring for 30min to obtain an addition composition agent of the liquid rapid repair material;
mixing and stirring the additive composition agent of the liquid quick repairing mix and the portland cement, wherein the additive composition agent of the liquid quick repairing mix accounts for 7% of the mass of the portland cement; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 4.5min, and final setting time is 11.3 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 33.2MPa, and the 28d compressive strength ratio is 92.1 percent.
< example 4>
An additive composition agent of a liquid quick repairing material and application thereof in cement concrete comprise:
step one, preparing modified carbon nanofibers:
mixing a nitric acid solution with the mass fraction of 50% with a sulfuric acid solution with the mass fraction of 50%, and adding the carbon nanofibers into the mixed acid solution; placing the mixture in a microwave and ultrasonic integrated reactor, and simultaneously starting microwaves and ultrasonic waves for synergistic treatment for 1h, wherein the microwave power is 120W, the ultrasonic power is 150W, the ultrasonic frequency is 35KHz, and the temperature is 60 ℃; filtering out oxidized nano carbon fibers, washing, and centrifugally dewatering;
II, adding the oxidized nano carbon fiber into N, N-dimethylformamide, magnetically stirring for 60min at the temperature of 60 ℃ and the stirring speed of 300rpm, adding a condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate, continuously stirring for 24h in the absence of light, washing, and centrifuging to obtain the modified nano carbon fiber.
Wherein the mass ratio of the nitric acid to the sulfuric acid is 1:3, the mass ratio of the carbon nanofibers to the mixed acid solution is 1:50, and the mass ratio of the carbon nanofibers, the N, N-dimethylformamide and the condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate is 1:80: 0.1.
Weighing 2000g of water, 200g of diethanolamine, 2600g of aluminum sulfate, 300g of ferric sulfate, 150g of lithium sulfate, 160g of magnesium oxide, 30g of hydroxycarboxylic acid, 40g of glycerol and 400g of modified carbon nanofibers
Step three, heating water to 60 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, hydroxycarboxylic acid, glycerol and modified carbon nanofibers, and stirring for 30 min; obtaining an additive composition agent of the liquid quick repairing material;
step four, mixing and stirring the additive composition agent of the liquid quick repairing mix and the portland cement, wherein the additive composition agent of the liquid quick repairing mix accounts for 6% of the mass of the portland cement; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 3.5min, and final setting time is 9.5 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 44.1MPa, and the 28d compressive strength ratio is 96.2 percent.
In the embodiment, the carbon nanofibers are oxidized to generate carboxyl on the surfaces of the carbon nanofibers, and then the carboxyl on the surfaces of the carbon nanofibers is converted into acyl chloride groups with higher reactivity to obtain the modified carbon nanofibers; the modification can enhance the dispersion effect of the carbon nanofibers in the cement, enhance the contact with a cement body, improve the cement gap structure and enhance the compressive strength of the cement; in comparative example 1, the initial setting time and the final setting time were shorter, and the compressive strength was enhanced.
< example 5>
An additive composition agent of a liquid quick repairing material and application thereof in cement concrete comprise:
step one, preparing modified carbon nanofibers:
mixing a nitric acid solution with the mass fraction of 50% with a sulfuric acid solution with the mass fraction of 50%, and adding the carbon nanofibers into the mixed acid solution; placing the mixture in a microwave and ultrasonic integrated reactor, and simultaneously starting microwaves and ultrasonic waves for synergistic treatment for 1h, wherein the microwave power is 120W, the ultrasonic power is 150W, the ultrasonic frequency is 35KHz, and the temperature is 60 ℃; filtering out oxidized nano carbon fibers, washing, and centrifugally dewatering;
II, adding the oxidized nano carbon fiber into N, N-dimethylformamide, magnetically stirring for 60min at the temperature of 60 ℃ and the stirring speed of 300rpm, adding a condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate, continuously stirring for 24h in the absence of light, washing, and centrifuging to obtain the modified nano carbon fiber.
Wherein the mass ratio of the nitric acid to the sulfuric acid is 1:3, the mass ratio of the carbon nanofibers to the mixed acid solution is 1:50, and the mass ratio of the carbon nanofibers, the N, N-dimethylformamide and the condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate is 1:80: 0.1.
Weighing 2000g of water, 200g of diethanolamine, 2600g of aluminum sulfate, 300g of ferric sulfate, 150g of lithium sulfate, 160g of magnesium oxide, 30g of hydroxycarboxylic acid, 40g of glycerol and 400g of modified carbon nanofibers
Heating water to 60 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, hydroxycarboxylic acid, glycerol and modified carbon nanofibers, and performing double-frequency ultrasonic treatment for 30min, wherein the frequency of double-frequency ultrasonic treatment is 35kHz and 85kHz respectively, and the power of each ultrasonic frequency is 400W; obtaining an additive composition agent of the liquid quick repairing material;
step four, mixing and stirring the additive composition agent of the liquid quick repairing mix and the portland cement, wherein the additive composition agent of the liquid quick repairing mix accounts for 6% of the mass of the portland cement; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: the initial setting time is 3min, and the final setting time is 9 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 45.2MPa, and the 28d compressive strength ratio is 96.7 percent.
In the embodiment, the carbon nanofibers are oxidized to generate carboxyl on the surfaces of the carbon nanofibers, and then the carboxyl on the surfaces of the carbon nanofibers is converted into acyl chloride groups with higher reactivity to obtain the modified carbon nanofibers; the modification can enhance the dispersion effect of the carbon nanofibers in the cement, enhance the contact with a cement body, improve the cement gap structure and enhance the compressive strength of the cement; in the third step, double-frequency ultrasonic treatment is adopted, so that the mixing is more uniform; in comparative example 1, the initial setting time and the final setting time were shorter, and the compressive strength was enhanced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The additive composition agent for the liquid quick repairing material is characterized by comprising the following components in parts by weight: 200-300 parts of water, 20-30 parts of diethanolamine, 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate and 15-20 parts of magnesium oxide.
2. The additive composition for the liquid rapid repair material according to claim 1, further comprising the following components in parts by weight: 3-6 parts of hydroxycarboxylic acid, 4-8 parts of glycerol and 40-60 parts of modified carbon nanofibers.
3. The additive composition for the liquid rapid repair material according to claim 1, which comprises the following components in parts by weight: 200 parts of water, 20 parts of diethanolamine, 260 parts of aluminum sulfate, 30 parts of ferric sulfate, 15 parts of lithium sulfate and 16 parts of magnesium oxide.
4. The additive composition for the liquid rapid repair material according to claim 2, which comprises the following components in parts by weight: 200 parts of water, 20 parts of diethanolamine, 260 parts of aluminum sulfate, 30 parts of ferric sulfate, 15 parts of lithium sulfate, 16 parts of magnesium oxide, 3 parts of hydroxycarboxylic acid, 4 parts of glycerol and 40 parts of modified carbon nanofibers.
5. The additive composition agent for the liquid rapid repair material according to claim 2, wherein the preparation method of the modified carbon nanofibers comprises the following steps:
mixing a nitric acid solution with the mass fraction of 50-80% and a sulfuric acid solution with the mass fraction of 50-80%, and adding the carbon nanofibers into the mixed acid solution; placing the mixture in a microwave and ultrasonic wave integrated reactor, simultaneously starting microwaves and ultrasonic waves for synergistic treatment for 1-2 hours, wherein the microwave power is 120-300W, the ultrasonic power is 150-300W, the ultrasonic frequency is 30-35 KHz, and the temperature is 30-90 ℃; filtering out oxidized nano carbon fibers, washing, and centrifugally dewatering;
II, adding oxidized carbon nanofibers into N, N-dimethylformamide, magnetically stirring for 30-60 min at the temperature of 60-80 ℃ and the stirring speed of 300-800 rpm, adding a condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate, continuously stirring for 12-24 h in the absence of light, washing, and centrifuging to obtain the modified carbon nanofibers.
The mass ratio of the nitric acid to the sulfuric acid is 1: 3-5, the mass ratio of the carbon nanofibers to the mixed acid solution is 1: 50-100, and the mass ratio of the carbon nanofibers, the N, N-dimethylformamide and the condensing agent 2- (7-azobenzotriazol) -N, N, N ', N' -tetramethylurea hexafluorophosphate is 1: 80-100: 0.1-0.5.
6. The additive composition agent for the liquid rapid repair material according to claim 3, wherein the components are mixed in the following manner: heating water to 60-80 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate and magnesium oxide, and stirring for 30-60 min.
7. The additive composition agent for the liquid rapid repair material according to claim 4, wherein the components are mixed in the following manner: heating water to 60-80 ℃, then sequentially adding diethanolamine, aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, hydroxycarboxylic acid, glycerol and modified carbon nanofibers, and performing double-frequency ultrasonic treatment for 30-60 min, wherein the frequency of double-frequency ultrasonic treatment is 30-35 kHz and 65-85 kHz respectively, and the power of each ultrasonic frequency is 300-400W.
8. The additive composition agent for the liquid rapid repairing mix according to any one of claims 1 to 7 and the application thereof in cement concrete are characterized in that the dosage of the additive composition agent for the liquid rapid repairing mix is 6 to 8 percent of the mass of cement; the cement is any one of portland cement, ordinary portland cement and composite portland cement.
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