CN114276070B - Super-strong high-toughness polyester concrete for structural repair, preparation method and application - Google Patents
Super-strong high-toughness polyester concrete for structural repair, preparation method and application Download PDFInfo
- Publication number
- CN114276070B CN114276070B CN202111656903.1A CN202111656903A CN114276070B CN 114276070 B CN114276070 B CN 114276070B CN 202111656903 A CN202111656903 A CN 202111656903A CN 114276070 B CN114276070 B CN 114276070B
- Authority
- CN
- China
- Prior art keywords
- component
- concrete
- polyester polyol
- repairing
- super
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
The application discloses super-strong high-toughness polyester concrete for structural repair, a preparation method and application thereof. The super-strong high-toughness polyester concrete for repairing the structure comprises a component A, a component B and a component C; the component A is diphenylmethane diisocyanate MDI; the component B is polyester polyol based on phthalic anhydride; the component C comprises the following components in percentage by weight: 10-20% of cement, 10-20% of fly ash, 10-20% of ore powder and 50-70% of quartz sand. The invention has the characteristics of simple and convenient construction process, short construction period and low construction cost.
Description
Technical Field
The application relates to concrete, in particular to super-strong high-toughness polyester concrete for structural repair, a preparation method and application.
Background
With the increase of heavy traffic and the improvement of vehicle load grade, under the condition of crudely nature, typical diseases such as steel bar corrosion, concrete cracks, falling and the like commonly exist in the steel bar and prestressed concrete structure under various load actions, so that extremely serious traffic safety hazards exist.
At present, cement mortar or fine stone concrete and polymer modified composite materials are mostly adopted for repairing the local section of a conventional reinforced bar and prestressed concrete structure. However, a great number of research and study results show that the conventional concrete local section repairing technology has a series of technical problems of self-cracking of repairing materials, hollowing and falling off after rust expansion of reinforcing steel bars and the like, and has poor using effect.
Disclosure of Invention
The present application aims to overcome or at least partially solve or alleviate the above-mentioned problems. The super-strong high-toughness polyester concrete for repairing the local section of the reinforced steel bar and prestressed concrete structure is provided.
In order to solve the technical problems, the invention provides super-strong high-toughness polyester concrete for structural repair, which comprises a component A, a component B and a component C;
the component A is diphenylmethane diisocyanate MDI;
b is polyester polyol;
the component C comprises the following components in percentage by weight:
10-20% of cement, 10-20% of fly ash, 10-20% of ore powder and 50-70% of quartz sand;
the polyester polyol is based on phthalic anhydride, and the preparation method of the polyester polyol comprises the following steps:
(1) 1, 4-butanediol, diethylene glycol and trimethylolpropane are put into a reaction kettle according to a certain molar ratio and stirred uniformly;
(2) Putting phthalic anhydride and dodecanedioic acid into a reaction kettle according to a certain molar ratio;
(3) Stirring to raise the temperature of the reaction system to 220-250 ℃, and keeping the temperature of the reaction system to be equal to the water outlet after the reaction system is clear transparent liquid;
(4) Stirring and heating, controlling the water yield, and controlling the temperature of the ejection water of the kettle to be not more than 100 ℃; after the kettle temperature reaches 225-255 ℃, maintaining the temperature, vacuumizing to-0.8 to-0.9 MPa, maintaining for 3-5 hours, detecting the hydroxyl value of the materials in the reaction kettle when vacuumizing, and stopping vacuumizing when the hydroxyl value is 200-800 mgkoh/g;
(5) And cooling the system to 50-60 ℃, adding the modifier, and uniformly stirring to obtain the phthalic anhydride-based polyester polyol.
The mass ratio of the component A to the component B to the component C is 3-5:3-5:90-95.
The mass ratio of the component A to the component B to the component C is 4:4:92.
The modifier comprises acetone, a phosphate flame retardant and an organosilicon defoamer;
the addition amount of the acetone is 15-25% of the weight of the polyester polyol;
the addition amount of the flame retardant is 2-7% of the weight of the polyester polyol 0 ；
The addition amount of the defoaming agent is 2-7% of the weight of the polyester polyol 0 。
The setting time of the polyester concrete is delayed by adding acetone, so that the construction operability is improved; adding a combustion improver: the fire resistance of the polyester concrete is improved; the addition of the defoamer improves the compactness of the polyester concrete.
The molar ratio of the 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid is 2.774:8.481:0.745:5.401:0.434;
or, the molar ratio of 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid is 6.658:3.769:0.745:4.726:0.434;
or, the molar ratio of the 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid is 8.877:2.827:0.745:4.726:0.434;
or, the molar ratio of the 1, 4-butanediol phthalic anhydride, the diethylene glycol, the trimethylolpropane, the phthalic anhydride and the dodecanedioic acid is 11.651:0.471:0.745:4.726:0.434.
further, when vacuumizing, introducing nitrogen into the bottom of the reaction kettle, controlling the pressure of an input pipe for conveying the nitrogen to be 0.15-0.25MPa, and stopping introducing the nitrogen until the hydroxyl value of the materials in the reaction kettle is detected to be 200-800 mgkoh/g. The nitrogen is introduced to accelerate the water and free small molecules in the system to be discharged. Further removing small molecules generated by the polycondensation reaction, reducing the residual quantity of residual monomers and promoting the reaction.
The acid value of the polyester polyol is less than 1.50mgkoh/g, and the average molecular weight is 140-560.
The particle size screening accumulated weight of the quartz sand is as follows:
the invention also provides a preparation method of the super-strong high-toughness polyester concrete for structural repair, which comprises the following steps:
(1) Weighing the component A, the component B and the component C according to the amount;
(2) Adding the component A into the component B, and pre-stirring for 3-5 minutes by adopting a drilling machine with the rotating speed not less than 1440 revolutions per minute to form an organic cementing agent material;
(3) Adding the component C into the organic cementing agent material prepared in the step 2), stirring again for 5-10 minutes by adopting a forced concrete stirrer, and fully mixing to obtain super-strong high-toughness polyester concrete for repairing the structure;
(4) And casting concrete on site, and naturally preserving for 0.5-2 hours.
The invention also provides application of the super-strong high-toughness polyester concrete for repairing the structure in repairing the local section of the reinforced bar and prestressed concrete structure, reinforcing the concrete bearing structure, repairing the concrete pavement of the civil and military airport, repairing and reinforcing the ultra-thin layer overlay and dam masonry concrete structure.
The invention overcomes the key technical problems of cracks, hollows, falling and the like of the repairing and reinforcing material caused by corrosion and expansion of the reinforcing steel bar in the conventional repairing and reinforcing material, adopts isocyanate, polyester polyol and various modifiers as cementing agents, adopts fine aggregates such as cement, fly ash, ore powder, quartz sand and the like as reinforcing fillers, and is made into the super-strong high-toughness composite material for repairing the reinforcing steel bar and prestressed concrete at normal temperature and normal pressure.
Detailed Description
The present application is further illustrated by the following specific examples:
example 1
The preparation method comprises the following steps of:
the component A is diphenylmethane diisocyanate MDI;
the component B is polyester polyol;
the component C comprises the following components in percentage by weight:
15% of cement, 15% of fly ash, 15% of ore powder and 55% of quartz sand.
The mass ratio of the component A to the component B to the component C is 4:4:92.
The preparation method of the polyester polyol comprises the following steps:
according to the mole ratio of 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid of 2.774:8.481:0.745:5.401: preparing a raw material at 0.434;
(1) 1, 4-butanediol, diethylene glycol and trimethylolpropane are put into a reaction kettle according to the molar ratio, and are stirred uniformly;
(2) Putting phthalic anhydride and dodecanedioic acid into a reaction kettle according to the molar ratio;
(3) Stirring to heat the reaction system to 240 ℃, wherein the heating speed is 20-25 ℃ per hour, and the reaction system is clear transparent liquid and then is kept at a constant temperature until water is discharged, and the top temperature of the reaction kettle is raised from 30 ℃ to 65 ℃;
(4) Stirring and heating, controlling the water yield, and controlling the temperature of the kettle ejection water at 85-98 ℃; after the temperature of the reaction kettle reaches 245 ℃, vacuumizing to-0.9 MPa in a constant temperature state, sampling and detecting the hydroxyl value of the materials in the reaction kettle every 2 hours, and stopping vacuumizing when the detected hydroxyl value of the polyester polyol is 220 mgkoh/g; the final polyester polyol had a hydroxyl value of 220mgkoh/g, an acid value of 1.58mgkoh/g and an average molecular weight of 506.4.
(5) The kettle top water outlet temperature of the reaction system is reduced from 98 ℃ to 55 ℃, and then acetone, phosphate flame retardant and organosilicon defoamer are added and stirred uniformly to obtain phthalic anhydride-based polyester polyol; the addition amount of acetone is 20% of the weight of the polyester polyol; the addition amount of the phosphate flame retardant is 5 percent of the weight of the polyester polyol 0 The method comprises the steps of carrying out a first treatment on the surface of the The addition amount of the organosilicon defoamer is 5 percent of the weight of the polyester polyol 0 。
Wherein, the organic silicon defoamer is selected from the defoamer with the model GS-5411 provided by Shanghai Cheng International trade company.
The phosphate flame retardant is RF-107 flame retardant available from Qingdao Union beautification Co.
Wherein the particle size screening accumulated weight of the quartz sand is as follows:
the grading experiment shows that the quartz sand has the maximum density and the minimum void ratio. The quartz sand is beneficial to the mechanical property, durability and economy of the prepared super-strong high-toughness polyester concrete for repairing the structure.
The preparation method of the super-strong high-toughness polyester concrete for repairing the structure comprises the following steps:
(1) Weighing the component A, the component B and the component C according to the amount;
(2) Adding the component A into the component B, and pre-stirring for 4 minutes by adopting a drilling machine with the rotating speed of 1440 revolutions per minute to form an organic cementing agent material;
(3) Adding the component C into the organic cementing agent material prepared in the step 2), stirring again for 8 minutes by adopting a forced concrete stirrer, and fully mixing to obtain concrete slurry;
(4) And pouring concrete slurry on site onto the pavement to be repaired of airport concrete, and naturally preserving for 2 hours.
Example 2
The preparation method comprises the following steps of:
the component A is diphenylmethane diisocyanate MDI;
the component B is polyester polyol;
the component C comprises the following components in percentage by weight:
10% of cement, 20% of fly ash, 10% of ore powder and 60% of quartz sand.
The mass ratio of the component A to the component B to the component C is 3:5:90.
The preparation method of the polyester polyol comprises the following steps:
the molar ratio of 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid was 6.658:3.769:0.745:4.726: preparing a raw material at 0.434;
(1) 1, 4-butanediol, diethylene glycol and trimethylolpropane are put into a reaction kettle according to the molar ratio, and are stirred uniformly;
(2) Putting phthalic anhydride and dodecanedioic acid into a reaction kettle according to the molar ratio;
(3) Stirring to raise the temperature of the reaction system to 220 ℃, wherein the temperature raising speed is 20-25 ℃ per hour, and the reaction system is clear transparent liquid and then is kept at a constant temperature until water is discharged;
(4) Stirring and heating, controlling the water yield, and controlling the temperature of the kettle ejection water at 85-98 ℃; after the kettle temperature reaches 225 ℃, vacuumizing to-0.8 MPa in a constant temperature state; sampling and detecting the hydroxyl value of the materials in the reaction kettle every 40 minutes, and stopping vacuumizing when the detected hydroxyl value of the polyester polyol is 359 mgkoh/g; the polyester polyol finally had an acid value of 1.11mgkoh/g and an average molecular weight of 311.9.
(5) The kettle top water outlet temperature of the reaction system is reduced from 98 ℃ to 50 ℃, and then acetone, phosphate flame retardant and organosilicon defoamer are added and stirred uniformly to obtain phthalic anhydride-based polyester polyol; the addition amount of acetone is 25% of the weight of the polyester polyol; the addition amount of the phosphate flame retardant is 2 percent of the weight of the polyester polyol 0 The method comprises the steps of carrying out a first treatment on the surface of the The addition amount of the organosilicon defoamer is 3 percent of the weight of the polyester polyol 0 。
Wherein the particle size screening accumulated weight of the quartz sand is as follows:
the preparation method of the super-strong high-toughness polyester concrete for repairing the structure comprises the following steps:
(1) Weighing the component A, the component B and the component C according to the amount;
(2) Adding the component A into the component B, and pre-stirring for 3 minutes by adopting a drilling machine with the rotating speed of 1440 revolutions per minute to form an organic cementing agent material;
(3) Adding the component C into the organic cementing agent material prepared in the step 2), stirring again for 10 minutes by adopting a forced concrete stirrer, and fully mixing to obtain concrete slurry;
(4) Casting concrete slurry on site onto the local section of the existing concrete structure, and naturally preserving for 2 hours.
Example 3
The preparation method comprises the following steps of:
the component A is diphenylmethane diisocyanate MDI;
the component B is polyester polyol;
the component C comprises the following components in percentage by weight:
20% of cement, 10% of fly ash, 20% of ore powder and 50% of quartz sand.
The mass ratio of the component A to the component B to the component C is 5:3:95.
The preparation method of the polyester polyol comprises the following steps:
according to the mole ratio of 1, 4-butanediol phthalic anhydride, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid of 8.877:2.827:0.745:4.726: preparing a raw material at 0.434;
(1) 1, 4-butanediol, diethylene glycol and trimethylolpropane are put into a reaction kettle according to the molar ratio, and are stirred uniformly;
(2) Putting phthalic anhydride and dodecanedioic acid into a reaction kettle according to the molar ratio;
(3) Stirring to raise the temperature of the reaction system to 230 ℃ at a temperature raising speed of 20-25 ℃ per hour, and keeping the temperature of the system at a constant temperature until water is discharged after the system is in a clear transparent liquid state;
(4) Stirring and heating, controlling the water yield, and controlling the temperature of the kettle ejection water at 85-98 ℃; after the temperature of the reaction kettle reaches 255 ℃, vacuumizing to-0.8 MPa in a constant temperature state, introducing nitrogen into the bottom of the reaction kettle, controlling the pressure of an input pipe for conveying the nitrogen to be 0.2MPa, sampling and detecting the hydroxyl value of materials in the reaction kettle every 20 minutes, and stopping vacuumizing when the hydroxyl value of the polyester polyol is detected to be 514 mgkoh/g; the polyester polyol finally had an acid value of 0.93mgkoh/g and an average molecular weight of 218.0.
(5) The kettle top water outlet temperature of the reaction system is reduced from 98 ℃ to 60 ℃, and then acetone, phosphate flame retardant and organosilicon defoamer are added and stirred uniformly to obtain phthalic anhydride-based polyester polyol; the addition amount of the acetone is the weight of the polyester polyol15% of (2); the addition amount of the phosphate flame retardant is 7 percent of the weight of the polyester polyol 0 The method comprises the steps of carrying out a first treatment on the surface of the The addition amount of the organosilicon defoamer is 7 percent of the weight of the polyester polyol 0 。
Wherein the particle size screening accumulated weight of the quartz sand is as follows:
the preparation method of the super-strong high-toughness polyester concrete for repairing the structure comprises the following steps:
(1) Weighing the component A, the component B and the component C according to the amount;
(2) Adding the component A into the component B, and pre-stirring for 5 minutes by adopting a drilling machine with the rotating speed of 1440 revolutions per minute to form an organic cementing agent material;
(3) Adding the component C into the organic cementing agent material prepared in the step 2), stirring again for 5 minutes by adopting a forced concrete stirrer, and fully mixing to obtain concrete slurry;
(4) And pouring concrete slurry on site onto the dam masonry concrete structure, and naturally preserving for 2 hours.
Example 4
The preparation method comprises the following steps of:
the component A is diphenylmethane diisocyanate MDI;
the component B is polyester polyol;
the component C comprises the following components in percentage by weight:
10% of cement, 10% of fly ash, 10% of ore powder and 70% of quartz sand.
The mass ratio of the component A to the component B to the component C is 4:3:91.
The preparation method of the polyester polyol comprises the following steps:
according to the mole ratio of 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid of 11.651:0.471:0.745:4.726: preparing a raw material at 0.434;
(1) 1, 4-butanediol, diethylene glycol and trimethylolpropane are put into a reaction kettle according to the molar ratio, and are stirred uniformly;
(2) Putting phthalic anhydride and dodecanedioic acid into a reaction kettle according to the molar ratio;
(3) Stirring to raise the temperature of the reaction system to 250 ℃ at a temperature raising speed of 20-25 ℃ per hour, and keeping the temperature of the system at a constant temperature until water is discharged after the system is in a clear transparent liquid state;
(4) Stirring and heating, controlling the water yield, and controlling the temperature of the ejection water of the kettle to be not more than 100 ℃; after the kettle temperature reaches 235 ℃, vacuumizing to-0.8 MPa in a constant temperature state, sampling and detecting the hydroxyl value of the materials in the reaction kettle every 1 hour, and stopping vacuumizing when the detected hydroxyl value of the polyester polyol is 636 mgkoh/g; the final polyester polyol had a hydroxyl value of 636mgkoh/g, an acid value of 0.650mgkoh/g and an average molecular weight of 176.4.
(5) The kettle top water outlet temperature of the reaction system is reduced from 98 ℃ to 55 ℃, and the modifier acetone, the phosphate flame retardant and the organic silicon defoamer are added and stirred uniformly to obtain the polyester polyol based on phthalic anhydride; the addition amount of acetone is 18% of the weight of the polyester polyol; the addition amount of the phosphate flame retardant is 4 percent of the weight of the polyester polyol 0 The method comprises the steps of carrying out a first treatment on the surface of the The addition amount of the organosilicon defoamer is 5 percent of the weight of the polyester polyol 0 。
Wherein the particle size screening accumulated weight of the quartz sand is as follows:
the preparation method of the super-strong high-toughness polyester concrete for repairing the structure comprises the following steps:
(1) Weighing the component A, the component B and the component C according to the amount;
(2) Adding the component A into the component B, and pre-stirring for 5 minutes by adopting a drilling machine with the rotating speed of 1440 revolutions per minute to form an organic cementing agent material;
(3) Adding the component C into the organic cementing agent material prepared in the step 2), stirring again for 8 minutes by adopting a forced concrete stirrer, and fully mixing to obtain concrete slurry;
(4) And pouring concrete slurry on site onto the local section of the steel bar and the prestressed concrete structure, and naturally preserving for 2 hours.
The mechanical properties of the high-strength elastic concrete of the invention are shown in Table 1
From the test data of the present invention in Table 1, the present invention has the following advantages:
(1) The tensile strength of the C60 concrete is about 5MPa, and the strength of the concrete is ten times or more than that of the C60 concrete, which indicates that the concrete has high strength;
(2) The ultimate tensile strain and compressive strain of the C60 concrete are respectively about 125 mu epsilon and 1500 mu epsilon, and the concrete is respectively 5 times more and about 3.0 times more, which proves that the concrete has good toughness;
(3) The bonding strength between the invention and the concrete is 3.4MPa, which is far greater than the technical requirement of not less than 2.5MPa specified by the national concrete structure reinforcing design specification, and the interface between the new and old materials is not damaged. Indicating good adhesion properties between the proprietary product and the concrete.
(4) The technical indexes of impermeability, frost resistance and chloride ion permeation resistance of the invention all reach the upper limit value specified by national steel bar and prestressed concrete bridge design specifications, which shows that the patent product has good durability.
The high-strength elastic concrete is used for carrying out thin-layer overlay on concrete pavement of expressways in extra large cities and civil airports, so that the bearing capacity of the concrete pavement in service is practically improved, the service technical index of the pavement in service can be effectively improved, the service life of the original structure is prolonged, and the high-strength elastic concrete has good social and economic benefits.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. The super-strong high-toughness polyester concrete for repairing the structure is characterized by comprising a component A, a component B and a component C;
the component A is diphenylmethane diisocyanate MDI;
the component B is polyester polyol;
the component C comprises the following components in percentage by weight:
10-20% of cement, 10-20% of fly ash, 10-20% of ore powder and 50-70% of quartz sand;
the polyester polyol is based on phthalic anhydride, and the preparation method of the polyester polyol comprises the following steps:
(1) 1, 4-butanediol, diethylene glycol and trimethylolpropane are put into a reaction kettle according to a certain molar ratio and stirred uniformly;
(2) Then phthalic anhydride and dodecanedioic acid are put into a reaction kettle according to a certain mole ratio;
(3) Stirring to raise the temperature of the reaction system to 220-250 ℃, and keeping the temperature of the reaction system at a constant temperature until water is discharged after the reaction system is in a clear transparent liquid;
(4) Stirring and heating, controlling the water yield, and controlling the temperature of the ejection water of the kettle to be not more than 100 ℃; after the kettle temperature reaches 225-255 ℃, maintaining the temperature, vacuumizing to-0.8 to-0.9 MPa, detecting the hydroxyl value of the materials in the reaction kettle when vacuumizing, and stopping vacuumizing when the hydroxyl value is 200-800 mgKOH/g;
(5) Cooling the system to 50-60 ℃, adding a modifier, and uniformly stirring to obtain phthalic anhydride-based polyester polyol;
the mass ratio of the component A to the component B to the component C is 3-5:3-5:90-95;
the modifier comprises acetone, a phosphate flame retardant and an organosilicon defoamer;
the addition amount of the acetone is 15-25% of the weight of the polyester polyol;
the addition amount of the flame retardant is 2-7% of the weight of the polyester polyol 0 ；
The addition amount of the defoaming agent is 2-7% of the weight of the polyester polyol 0 ；
The molar ratio of the 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid is 2.774:8.481:0.745:5.401:0.434;
or, the molar ratio of 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid is 6.658:3.769:0.745:4.726:0.434;
or, the molar ratio of the 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid is 8.877:2.827:0.745:4.726:0.434;
or, the molar ratio of the 1, 4-butanediol, diethylene glycol, trimethylolpropane, phthalic anhydride and dodecanedioic acid is 11.651:0.471:0.745:4.726:0.434;
the particle size screening accumulated weight of the quartz sand is as follows:
2.0mm or more and 0%
2.0-1.6mm 7-12%
1.6-1.0mm： 28-38%
1.0-0.5mm： 62-72%
0.5-0.16mm： 82-92%
0.18-0.08mm： 98-99%
0.08-0.00mm： 100％。
2. The super high toughness polyester concrete for structural repair according to claim 1, wherein the mass ratio of the a component, the B component and the C component is 4:4:92.
3. The super high toughness polyester concrete for repairing a structure according to claim 1, wherein when the vacuum is applied, nitrogen is introduced into the bottom of the reaction kettle, the pressure of an input pipe for conveying the nitrogen is controlled to be 0.15-0.25MPa, and the introduction of the nitrogen is stopped until the hydroxyl value of the material in the reaction kettle is detected to be 200-800 mgKOH/g.
4. The super high toughness polyester concrete for structural repair according to claim 3, wherein the polyester polyol has an acid value of less than 1.50mgKOH/g and an average molecular weight of 140 to 560.
5. The method for preparing super strong high toughness polyester concrete for structural repair according to any one of claims 1 to 4, comprising the steps of:
(1) Weighing the component A, the component B and the component C according to the amount;
(2) Adding the component A into the component B, and pre-stirring for 3-5 minutes by adopting a drilling machine with the rotating speed not less than 1440 revolutions per minute to form an organic cementing agent material;
(3) And C) adding the component C into the organic cementing agent material prepared in the step 2), stirring again for 5-10 minutes by adopting a forced concrete stirrer, and fully mixing to obtain the super-strong high-toughness polyester concrete for repairing the structure.
6. Use of the super strong high toughness polyester concrete for repairing structures according to any one of claims 1 to 4 in repairing local sections of reinforced steel bars and prestressed concrete structures, reinforcing concrete bearing structures, repairing concrete pavement of civil and military airports, repairing ultra-thin layer covers and repairing and reinforcing dam masonry concrete structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656903.1A CN114276070B (en) | 2021-12-30 | 2021-12-30 | Super-strong high-toughness polyester concrete for structural repair, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656903.1A CN114276070B (en) | 2021-12-30 | 2021-12-30 | Super-strong high-toughness polyester concrete for structural repair, preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114276070A CN114276070A (en) | 2022-04-05 |
| CN114276070B true CN114276070B (en) | 2023-04-25 |
Family
ID=80878860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111656903.1A Active CN114276070B (en) | 2021-12-30 | 2021-12-30 | Super-strong high-toughness polyester concrete for structural repair, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114276070B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015170960A1 (en) * | 2014-05-05 | 2015-11-12 | Universiti Kebangsaan Malaysia | Lightweight concrete composite from renewable resources |
| US10759701B1 (en) * | 2015-09-09 | 2020-09-01 | Sebastos Technologies Inc. | Low-density high-strength concrete and related methods |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167544B (en) * | 2010-12-31 | 2012-12-19 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane resin mortar for cement base material repairing |
| WO2014196607A1 (en) * | 2013-06-07 | 2014-12-11 | 株式会社カネカ | Curable resin composition, structural adhesive produced using same, coating material or fiber reinforced composite material, foam body produced by foaming same, laminated body produced by curing same, and cured product thereof |
| CN104829177B (en) * | 2015-04-21 | 2017-04-19 | 北京中科嘉固建筑材料科技有限公司 | High strength crack resistant concrete and preparation method, composition and application thereof |
| CN106220832B (en) * | 2016-08-15 | 2018-07-20 | 上海回天新材料有限公司 | A kind of method and apparatus producing polyester polyol |
| CN108316667B (en) * | 2018-02-05 | 2020-01-17 | 江苏苏博特新材料股份有限公司 | Preparation method of protection and repair system for surface of concrete base layer |
-
2021
- 2021-12-30 CN CN202111656903.1A patent/CN114276070B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015170960A1 (en) * | 2014-05-05 | 2015-11-12 | Universiti Kebangsaan Malaysia | Lightweight concrete composite from renewable resources |
| US10759701B1 (en) * | 2015-09-09 | 2020-09-01 | Sebastos Technologies Inc. | Low-density high-strength concrete and related methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114276070A (en) | 2022-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2067753A1 (en) | Concrete Mix | |
| CN104176988B (en) | Organic/inorganic composite material of a kind of quick reparation asphalt pavement pit and preparation method thereof | |
| CN104829177B (en) | High strength crack resistant concrete and preparation method, composition and application thereof | |
| CN111606605A (en) | Water-based epoxy resin modified emulsified asphalt cold-patch material for rapid road repair and preparation method thereof | |
| CN112341104B (en) | High-performance road rubber concrete and preparation method thereof | |
| CN111377685A (en) | Pervious concrete and construction method thereof | |
| CN113336472A (en) | Epoxy modified polyurethane road repair material and preparation method thereof | |
| CN114276070B (en) | Super-strong high-toughness polyester concrete for structural repair, preparation method and application | |
| CN113636802A (en) | Ultrahigh-performance concrete and preparation method thereof | |
| CN113929409A (en) | Ultrahigh-performance concrete based on composite cementitious material system | |
| CN114349402B (en) | Super-strong high-toughness polyester concrete for structure restoration, preparation method and application | |
| CN107445551A (en) | A kind of integral type sound barrier column and preparation method thereof | |
| CN114163167B (en) | Super-strong high-toughness polyester concrete for rapid structural repair, and preparation method and application thereof | |
| CN111574185A (en) | Acid corrosion resistant concrete pipe pile and preparation method thereof | |
| CN104829176B (en) | High-strength light polymer mortar and preparation method thereof, composition and application | |
| CN1291110C (en) | Concrete tube pile with fine milled slag micropowder and production me thod thereof | |
| CN110952412A (en) | Concrete pavement construction method | |
| CN114149200B (en) | Super-strong high-toughness polyester concrete for rapid structural restoration, and preparation method and application thereof | |
| CN116283148A (en) | Steaming-free ultra-high-performance concrete for bridge pier body and preparation method thereof | |
| CN115232289A (en) | Modified epoxy resin, preparation method and application thereof, and modified epoxy resin concrete | |
| US9045368B1 (en) | Flexible polymer concrete and methods for making flexible polymer concrete | |
| CN106587728A (en) | High-wear resistance polyurethane composite concrete material and using method thereof | |
| CN113045261A (en) | High-toughness early-strength polyurethane concrete and preparation method thereof | |
| CN114075807B (en) | Cement pavement staggered platform repairing method | |
| Tate | Investigation into the use of tire derived rubber aggregates and recycled steel wire fiber for use in concrete subjected to impact loading |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |