CN114479449A - Composite material for ground restoration and bearing reinforcement engineering, preparation method and application - Google Patents
Composite material for ground restoration and bearing reinforcement engineering, preparation method and application Download PDFInfo
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- CN114479449A CN114479449A CN202210256888.XA CN202210256888A CN114479449A CN 114479449 A CN114479449 A CN 114479449A CN 202210256888 A CN202210256888 A CN 202210256888A CN 114479449 A CN114479449 A CN 114479449A
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- China
- Prior art keywords
- composite material
- bearing reinforcement
- load
- reinforcement engineering
- ground
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- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 230000002787 reinforcement Effects 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 11
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 230000008439 repair process Effects 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000006116 polymerization reaction Methods 0.000 claims description 9
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 230000003197 catalytic effect Effects 0.000 claims description 7
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 7
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- 239000002244 precipitate Substances 0.000 claims description 6
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 229910000071 diazene Inorganic materials 0.000 claims description 5
- YNLAOSYQHBDIKW-UHFFFAOYSA-M diethylaluminium chloride Chemical compound CC[Al](Cl)CC YNLAOSYQHBDIKW-UHFFFAOYSA-M 0.000 claims description 5
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000004305 biphenyl Substances 0.000 claims description 4
- RAABOESOVLLHRU-UHFFFAOYSA-N diazene Chemical compound N=N RAABOESOVLLHRU-UHFFFAOYSA-N 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/10—Silicon-containing compounds
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a composite material for ground repair and bearing reinforcement engineering, a preparation method and application, and relates to the technical field of high polymer materials. The composite material is prepared by mixing hyperbranched polyethyleneimine, talcum powder and basalt fiber according to a mass ratio of 1-2: 1: 1-4. The composite material is mixed with water, can be injected into a building to be repaired through grouting, is used for lifting, leveling and bearing and reinforcing a sunken road surface, does not influence the subject structure of the building, and can ensure the normal operation of a building system.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a composite material for ground restoration and bearing reinforcement engineering, a preparation method and application.
Background
In the house construction and highway engineering, the polymer grouting technology can well treat the overlarge structural deformation caused by foundation settlement. However, in the occasions with high safety factor requirements, large bearing coefficient and no influence on the normal operation of the system, such as high-speed rail elevated piers, airport runways and the like, the polymer grouting technology can not be effectively applied on the premise of not damaging the original structure.
Aiming at the problem that the traditional high polymer material solidified body has low rigidity, the traditional high polymer material solidified body can only be used for reinforcing foundation soil in the process of lifting and leveling the structure, and can not be directly injected to the bottom of a pavement slab.
Meanwhile, the traditional high polymer material is easy to damage a main body mechanism in the construction process and influences the normal operation of a building system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a composite material for ground repair and bearing reinforcement engineering, which is prepared by combining novel macromolecular hyperbranched polyethyleneimine, which is designed and synthesized by self, traditional engineering materials of talcum powder particles and basalt fibers. The composite material is mixed with water in a construction site according to actual construction conditions, and the mixed material is grouted and injected into a building to be repaired with the aid of a forming die for lifting and leveling a sinking road surface and bearing and reinforcing.
The composite material for ground restoration and bearing reinforcement engineering is composed of hyperbranched polyethyleneimine, talcum powder and basalt fibers, wherein the mass ratio of the hyperbranched polyethyleneimine to the talcum powder to the basalt fibers is 1-2: 1: 1-4.
Preferably, the molecular weight of the hyperbranched polyethyleneimine is 5000-20000, the molecular weight distribution is 1.05-1.20, and the hyperbranched degree is 50-80%.
More preferably, the preparation method of the hyperbranched polyethyleneimine comprises the following steps:
putting an ethylene imine monomer aqueous solution into a polymerization reaction kettle, introducing mixed gas of hydrogen chloride and carbon dioxide, then carrying out catalytic polymerization under the action of a mixed catalyst which is composed of N ', N' -diphenyl diimine nickel chloride and diethylaluminum chloride and has the pressure of 106KPa and the mass ratio of 20:100, and carrying out post-treatment to obtain the hyperbranched polyethyleneimine.
More preferably, the mass concentration of the ethylene imine monomer aqueous solution is 10% to 60%.
More preferably, the volume ratio of the hydrogen chloride to the carbon dioxide in the mixed gas is 1: 10-10: 1.
More preferably, the reaction temperature of the catalytic polymerization is 20-100 ℃, and the reaction time is 2-24 hours.
More preferably, the post-treatment is to slowly add an aqueous solution of sodium hydroxide under a stirring state after the reaction is finished, neutralize and adjust the pH of the solution to 10-11 to obtain a solid precipitate, and finally, dry and dry the solid precipitate.
The preparation method of the composite material for ground repair and bearing reinforcement engineering is to uniformly mix the hyperbranched polyethyleneimine, the talcum powder and the basalt fiber in proportion to obtain the composite material.
The invention also provides application of the composite material for ground restoration and bearing reinforcement engineering, and particularly relates to the application of the composite material mixed with water for ground restoration and bearing reinforcement, wherein the mass ratio of the water to the composite material is 1-10: 1.
Compared with the prior art, the invention has the following beneficial effects:
the composite material is mixed with water, can be injected into a building to be repaired through grouting, is used for lifting, leveling and bearing and reinforcing a sunken road surface, does not influence the subject structure of the building, and can ensure the normal operation of a building system.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
And taking 500mL of reaction kettle, adding 200mL of 30 mass percent ethylene imine monomer aqueous solution, and covering and sealing the reaction kettle. Controlling the temperature to be 30 ℃ in a stirring state in the kettle, introducing 100mL of hydrogen chloride gas and 100mL of carbon dioxide gas under normal pressure through a gas passage of the kettle, then carrying out catalytic polymerization under the action of a mixed catalyst which is 106KPa in pressure and 20:100 in mass ratio and consists of N ', N' -diphenyl diimine nickel chloride and diethylaluminum chloride, keeping the temperature for reaction for 12 hours, and keeping a reaction system in a closed state;
after the reaction is finished, slowly adding a sodium hydroxide aqueous solution with the mass fraction of 60% under a stirring state, neutralizing and adjusting the pH value to 10-11 to obtain a precipitate, and drying the precipitate to obtain the hyperbranched polyethyleneimine polymer for later use.
And (3) taking a 5L drying stirrer, respectively adding 1kg of hyperbranched polyethyleneimine polymer, 1kg of talcum powder particles and 1kg of basalt fibers, and mechanically stirring and completely mixing for 10 minutes to obtain the composite material.
According to the construction site conditions, the mixing ratio of the composite material and water is adjusted to achieve the optimal use effect of the composite material, and the mixing ratio of the water and the composite material is controlled to be 2: 1.
example 2
And taking 500mL of reaction kettle, adding 200mL of 60% by mass of ethylene imine monomer aqueous solution, and covering and sealing the reaction kettle. Controlling the temperature to be 50 ℃ in the stirred state in the kettle, introducing 100mL of hydrogen chloride gas and 25mL of carbon dioxide gas under normal pressure through a gas passage of the kettle, completely closing a reaction kettle system, carrying out catalytic polymerization under the action of a mixed catalyst which is composed of N ', N' -diphenyl butane diimine nickel chloride and diethylaluminum chloride with the pressure of 106KPa and the mass ratio of 20:100, and keeping the temperature for reaction for 8 hours.
After the reaction is finished, slowly adding a sodium hydroxide aqueous solution with the mass fraction of 40% under a stirring state, neutralizing, adjusting the pH value to 10-11, drying and drying to obtain the hyperbranched polyethyleneimine polymer for later use.
And (3) respectively adding 2kg of hyperbranched polyethyleneimine polymer, 1kg of talcum powder particles and 1kg of basalt fibers into a 5L drying stirrer, and mechanically stirring and completely mixing for 10 minutes to obtain the composite material.
According to the construction site conditions, the mixing ratio of the composite material and water is adjusted to achieve the optimal use effect of the composite material, and the mixing ratio of the water to the composite material is controlled to be 5: 1.
Example 3
And taking 500mL of reaction kettle, adding 300mL of the 50% by mass aqueous solution of the ethylene imine monomer, and covering and sealing the reaction kettle. Controlling the temperature to be 45 ℃ under the stirring state in the kettle, introducing 100mL of hydrogen chloride gas and 50mL of carbon dioxide gas under normal pressure through a gas passage of the kettle, completely sealing a reaction kettle system, carrying out catalytic polymerization under the action of a mixed catalyst which is 106KPa in pressure and 20:100 in mass ratio and consists of N ', N' -diphenyl diimine nickel chloride and diethylaluminum chloride, and keeping the temperature to react for 24 hours
After the reaction is finished, slowly adding sodium hydroxide solid powder under the stirring state, neutralizing, adjusting the pH value to 10-11, drying and drying to obtain the hyperbranched polyethyleneimine polymer for later use.
And (3) respectively adding 2kg of hyperbranched polyethyleneimine polymer, 1kg of talcum powder particles and 4kg of basalt fibers into a 5L drying stirrer, and mechanically stirring and completely mixing for 20 minutes to obtain the composite material.
According to the construction site conditions, the mixing ratio of the composite material and water is adjusted to achieve the optimal use effect of the composite material, and the mixing ratio of the water to the composite material is controlled to be 10: 1.
It should be noted that the above-mentioned embodiments are merely examples of the present invention, and it is obvious that the present invention is not limited to the above-mentioned embodiments, and other modifications are possible. All modifications directly or indirectly derivable by a person skilled in the art from the present disclosure are to be considered within the scope of the present invention.
Claims (9)
1. The composite material for ground restoration and bearing reinforcement engineering is characterized by comprising hyperbranched polyethyleneimine, talcum powder and basalt fibers, wherein the mass ratio of the hyperbranched polyethyleneimine to the talcum powder to the basalt fibers is 1-2: 1: 1-4.
2. The composite material for ground repair and load-bearing reinforcement engineering according to claim 1, wherein the hyperbranched polyethyleneimine has a molecular weight of 5000-20000, a molecular weight distribution of 1.05-1.20, and a hyperbranched degree of 50-80%.
3. The composite material for ground repair and load-bearing reinforcement engineering according to claim 2, wherein the preparation method of the hyperbranched polyethyleneimine comprises the following steps:
putting an ethylene imine monomer aqueous solution into a polymerization reaction kettle, introducing mixed gas of hydrogen chloride and carbon dioxide, then carrying out catalytic polymerization under the action of a mixed catalyst consisting of N ', N' -diphenyl diimine nickel chloride and diethylaluminum chloride with the pressure of 106KPa and the mass ratio of 20:100, and carrying out post-treatment to obtain the hyperbranched polyethyleneimine.
4. The composite material for ground restoration and load-bearing reinforcement engineering according to claim 3, wherein the mass concentration of the ethylene imine monomer aqueous solution is 10-60%.
5. The composite material for ground restoration and load bearing reinforcement engineering according to claim 3, wherein the volume ratio of hydrogen chloride to carbon dioxide in the mixed gas is 1: 10-10: 1.
6. The composite material for ground restoration and load-bearing reinforcement engineering according to claim 3, wherein the reaction temperature of the catalytic polymerization is 20-100 ℃ and the reaction time is 2-24 hours.
7. The composite material for ground restoration and load-bearing reinforcement engineering according to claim 3, wherein the post-treatment comprises slowly adding an aqueous solution of sodium hydroxide under stirring after the reaction is finished, neutralizing and adjusting the pH of the solution to 10-11 to obtain a solid precipitate, and finally drying and drying the solid precipitate.
8. The preparation method of the composite material for ground restoration and load-bearing reinforcement engineering according to any one of claims 1 to 7, wherein the composite material is obtained by uniformly mixing the hyperbranched polyethyleneimine, the talcum powder and the basalt fiber in proportion.
9. The application of the composite material for ground restoration and load bearing reinforcement engineering according to any one of claims 1 to 7, wherein the composite material is mixed with water for ground restoration and load bearing reinforcement, and the mass ratio of water to the composite material is 1-10: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256888.XA CN114479449A (en) | 2022-03-16 | 2022-03-16 | Composite material for ground restoration and bearing reinforcement engineering, preparation method and application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210256888.XA CN114479449A (en) | 2022-03-16 | 2022-03-16 | Composite material for ground restoration and bearing reinforcement engineering, preparation method and application |
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| CN202210256888.XA Pending CN114479449A (en) | 2022-03-16 | 2022-03-16 | Composite material for ground restoration and bearing reinforcement engineering, preparation method and application |
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2022
- 2022-03-16 CN CN202210256888.XA patent/CN114479449A/en active Pending
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Application publication date: 20220513 |