CN110937870B - Rapid repairing material for airport parking apron and preparation method thereof - Google Patents
Rapid repairing material for airport parking apron and preparation method thereof Download PDFInfo
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- CN110937870B CN110937870B CN201911276886.1A CN201911276886A CN110937870B CN 110937870 B CN110937870 B CN 110937870B CN 201911276886 A CN201911276886 A CN 201911276886A CN 110937870 B CN110937870 B CN 110937870B
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention belongs to the technical field of airport parking apron maintenance, and particularly relates to a rapid repair material for an airport parking apron and a preparation method thereof. The components of the repairing material comprise high belite sulphoaluminate cement, wollastonite powder, a powder defoaming agent, a water repellent, quartz powder, acrylic acid redispersible latex powder, a polycarboxylic acid high-efficiency water reducing agent, a medium-term early strength agent, an early-onset retarder, low-viscosity HPMC (hydroxy propyl methyl cellulose), fine aggregate, heat-resistant fiber and polymer fiber; the repairing material has high adhesive force, and does not bulge or crack after being repaired; the strength can reach more than C65; the toughness is high, and the impact resistance can reach more than 20 times of that of common concrete; can resist low-temperature circulating freeze thawing below-40 ℃; acid salt corrosion resistance; the coefficient of expansion with heat and contraction with cold is consistent: ensuring that the cold-hot circulation and the original concrete generate synchronous displacement; the construction method has the characteristics that the navigation can be realized only by maintaining for 2 hours after the construction, and the like, and is suitable for the rapid maintenance and repair of airport roads.
Description
Technical Field
The invention belongs to the technical field of airport parking apron maintenance, and particularly relates to a rapid repair material for an airport parking apron and a preparation method thereof.
Background
The airport parking lanes in China are mostly rigid cement concrete road surfaces which have the characteristics of high strength and good durability, but after long-term use, the road surfaces are influenced by the conditions of long-term load of airplanes, weather changes such as wind and snow addition, cold and hot alternation and the like, so that the airport road surfaces have the even worse conditions such as cracks, fractures, edge falling and corner falling, and the like, the normal operation of airports can be influenced, and the takeoff of the airplanes can be influenced if the airport is serious. Therefore, the task of quickly and permanently repairing the airport runway and the airport road can be important for the repair of the airport pavement.
The mechanism of the crack generation on the ground of the machine way is considered to be that the internal stress caused by the restrained deformation of the concrete material is larger than the tensile strength of the material, and the general repairing method is to adopt measures such as reinforcement, filling and repairing materials, steel plate bonding and reinforcement, epoxy resin injection method and the like. In the prior art, the quick repair to the aircraft channel crack can be realized mostly, but traditional repair materials's drying time is longer, delay the flight at airport, can cause the loss of airport and passenger, and still easily cause the crack after repairing, many times repair repeatedly only can increase unnecessary time cost and the waste of capital cost, and the repair materials majority that adopts can not fuse the bonding with original concrete mutually, the performance of bonding is relatively poor, consequently, research and development one kind can adapt to different aircraft channel ground, can accord with the aircraft channel architectural mechanics standard, and can carry out quick repair, the repair materials that possesses high elasticity becomes the problem of waiting to solve urgently.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a rapid repair material for airport parking apron, which has the characteristics of low dimensional change rate, high tensile bonding strength, high crack resistance, good durability and the like, and a preparation method thereof.
The technical content of the invention is as follows:
the invention provides a quick repairing material for airport parking apron, which comprises the components of high belite sulphoaluminate cement, wollastonite powder, ceramic micro powder, mica powder, a powder defoaming agent, a water repellent, acrylic acid redispersible latex powder, a polycarboxylic acid high-efficiency water reducing agent, an early strength agent, a retarder, low-viscosity HPMC (hydroxy propyl methyl cellulose), a fine aggregate, heat-resistant fibers and polymer fibers.
The quick repairing material comprises, by mass, 30-45% of high belite sulphoaluminate cement, 1-10% of wollastonite powder, 10-30% of ceramic micro powder, 5-15% of mica powder, 0.1-0.5% of powder defoaming agent, 0.1-0.5% of hydrophobic agent, 5-15% of acrylic acid redispersible latex powder, 0.1-0.5% of polycarboxylic acid high-efficiency water reducing agent, 0.01-0.1% of early strength agent, 0.01-0.1% of retarder, 0.01-0.1% of low-viscosity HPMC, 10-30% of fine aggregate, 0.05-0.2% of heat-resistant fiber and 0.05-0.2% of polymer fiber;
the high belite sulphoaluminate cement is used as a main cementing material, the dry shrinkage rate of the high belite sulphoaluminate cement is about one tenth of that of common Portland cement, the early strength is high, the compressive strength can reach about 70% of that of 28 days after 7 days, the size change rate of the rapid repairing material can be reduced, the rapid repairing material can be matched with concrete generating pathological changes, the load is jointly borne, and the cracking is reduced;
the application particle size range of the wollastonite powder is 0.0375-0.15 mm, and the main component of the wollastonite powder is CaSiO3The composite material has needle-shaped and fibrous crystal forms, not only plays a filling role, but also can partially replace asbestos and glass fiber to be used for reinforcing materials, reduces cracks, reduces surface oil absorption and enhances corrosion resistance;
the ceramic micro powder has a use particle size range of 0.0375-0.15 mm, is a high-strength and hard microsphere, and is composed of an inert component SiO2And Al2O3The composition has excellent insulativity, durability, corrosion resistance, weather resistance, high temperature resistance and chemical resistance; unlike irregularly shaped particles, ceramic micropowder can easily roll between each other, which allows systems using ceramic micropowder to have lower viscosity, enabling improved flowability; the ceramic micro powder can enhance the surface hardness, the washing resistance and the wear resistance of the repair material;
the mica powder has a use particle size range of 0.0375-0.15 mm, wherein SiO is mainly used2And Al2O3The mica wafer has the characteristics of good elasticity, toughness, insulativity, sound insulation, shock absorption, high temperature resistance, acid and alkali resistance, corrosion resistance, strong adhesion and the like, the flaky structures form basically parallel orientation arrangement, the permeation of water and other corrosive substances is strongly blocked, a series of physical moduli of the material can be changed, the viscoelasticity of the material is formed or changed, vibration energy is efficiently absorbed, vibration waves and sound waves are weakened, and in addition, the vibration waves and the sound waves form repeated reflection between the mica wafers to also weaken the energy of the mica wafers;
the powder defoaming agent is used for reducing air bubbles in the quick repair material slurry after being stirred by adding water, and is used in cooperation with the polycarboxylic acid high-efficiency water reducing agent to improve the compactness of the quick repair material slurry after being hardened;
the water repellent comprises an organic silicon water repellent, so that the hardened surface of the rapid repair material slurry has a lotus leaf effect, the rapid repair material slurry can effectively inhibit external water from soaking into the repair material, the water absorption of the material is reduced to improve the water resistance, and the reduction of the compressive strength caused by the fact that a large amount of external water is soaked into the hardened rapid repair material is avoided;
the glass transition temperature of the acrylic acid redispersible latex powder is less than or equal to 8 ℃, the flexible acrylic acid redispersible latex powder is used as an organic cementing material, forms rigid-flexible complementation with cement and can also greatly improve the adhesive force, the acrylic acid redispersible latex powder with the glass transition temperature of less than or equal to 8 ℃ is selected, so that the rapid repair material has certain flexibility to reduce cracking caused by external force, a uniform net structure is formed inside the cured rapid repair material slurry, the compactness is improved, the invasion of external water is resisted, and the acrylic acid redispersible latex powder molecules have a large amount of hydrophobic groups, so that the impermeability can be improved, and the waterproof performance is ensured;
the polycarboxylic acid high-efficiency water reducing agent reduces water consumption to improve the combination of components with early strength, can strengthen materials to form a good pore structure and a compact space structure, and greatly improves the shrinkage performance of a repairing material compared with the prior art, thereby improving the mechanical property and the durability of the materials;
the early strength agent comprises one or more of lithium carbonate and lithium sulfate;
the retarder comprises one or more of tartaric acid, sodium gluconate, sodium citrate and sucrose, improves the fluidity of the mortar when the repair material is used, and improves the mechanical property;
the low-viscosity HPMC is used for ensuring that the rapid repair material slurry is uniform and consistent, does not delaminate and bleed, but does not have too high viscosity so as to influence the overflow and high fluidity of air bubbles in the rapid repair material slurry;
the fine aggregate comprises carborundum, the grain diameter is less than or equal to 0.5mm, the carborundum mainly comprises silicon carbide, the density and the hardness are high, and the Mohs degree is about 9.5 ℃, and the carborundum is used as the fine aggregate to improve the compressive strength, the wear resistance and the hardness of the rapid repair material;
the heat-resistant fiber comprises one or more of sepiolite fiber, glass fiber, carbon fiber, ceramic fiber and basalt fiber;
the polymer fiber comprises one or more of polyester fiber, polypropylene short fiber, polyacrylonitrile fiber and polyvinyl alcohol fiber, and the tensile bonding strength among the components of the repairing material is enhanced.
The rapid repair material for the airport parking apron is used by mixing the components according to a certain proportion, fully and uniformly stirring, adding water for stirring when in use if the depth of the repaired position is shallow, and additionally adding gravels with different grades for use if the depth of the repaired position is deep.
The invention has the following beneficial effects:
the high belite sulphoaluminate cement used as the rapid repair material for the airport apron has low size change rate, can be matched with concrete generating pathological changes, and jointly bears load, thereby reducing cracking; the combination of the early strength agent and the retarder can prolong the initial setting time of the quick-repair material and accelerate the final setting so as to ensure the constructable operation time of the material and accelerate the completion of repair and use; because the application environment is special, friction or air injection in airplane sliding can generate heat, the heat-resistant fiber and the polymer fiber are compounded to improve the tensile bonding strength among all components, reduce deformation caused by internal stress generated by early dimensional deformation, and the dual functions of the heat-resistant fiber and the polymer fiber can enhance the heat resistance, the crack resistance and the deformation resistance of the repair material;
the rapid repair material has the characteristics that the adhesion to a base material is high, and the material is not hollowly and cracked after being repaired; the surface wear resistance is good, which is more than 4 times of that of common concrete, and the composite use strength of the concrete and coarse aggregate can reach more than C65; the flexibility is high: the shock resistance can reach more than 20 times of that of common concrete; cold-proof and freeze-proof: the material has extremely low water absorption rate, can resist low-temperature circulating freeze thawing below minus 40 ℃, and does not have the phenomenon of hollowing and shedding; acid salt corrosion resistance: the snow melting agent also has certain resistance to corrosion; the coefficient of expansion with heat and contraction with cold is consistent: the synchronous displacement between the cold and hot circulation and the original concrete is ensured, and the phenomena of infirm bonding, falling off and the like caused by inconsistent shrinkage deformation are prevented; the use speed is fast, only need the maintenance after the construction 2 hours can the characteristics such as navigation, very be applicable to the maintenance and the repair of airport road, construction convenience, during the use, can use in the scene with water stirring, can additionally add the rubble according to the depth of repairing the position and use.
Detailed Description
The present invention is described in further detail in the following detailed description with reference to specific embodiments, which are intended to be illustrative only and not to be limiting of the scope of the invention, as various equivalent modifications of the invention will become apparent to those skilled in the art after reading the present invention and are intended to be included within the scope of the appended claims.
All the raw materials and reagents of the invention are conventional market raw materials and reagents unless otherwise specified.
Example 1
The component proportion of the quick repairing material for the airport apron is as follows: 30% of high belite sulphoaluminate cement, 10% of wollastonite powder, 15% of ceramic micro powder, 10% of mica powder, 0.5% of powder defoaming agent, 0.5% of organic silicon water repellent, 8% of acrylic acid redispersible latex powder, 0.5% of polycarboxylic acid high-efficiency water reducing agent, 0.05% of lithium carbonate, 0.1% of tartaric acid, 0.1% of low-viscosity HPMC, 25% of carborundum, 0.05% of sepiolite fiber and 0.2% of polyester fiber.
Example 2
The component proportion of the quick repairing material for the airport apron is as follows: 38% of high belite sulphoaluminate cement, 6% of wollastonite powder, 25% of ceramic micro powder, 15% of mica powder, 0.1% of powder defoaming agent, 0.1% of organic silicon water repellent, 5.25% of acrylic acid redispersible latex powder, 0.1% of polycarboxylic acid high-efficiency water reducing agent, 0.1% of lithium carbonate, 0.01% of sodium gluconate, 0.09% of low-viscosity HPMC, 10% of carborundum, 0.15% of glass fiber and 0.1% of polypropylene short fiber.
Example 3
The component proportion of the quick repairing material for the airport apron is as follows: 42% of high belite sulphoaluminate cement, 3% of wollastonite powder, 20% of ceramic micro powder, 5% of mica powder, 0.1% of powder defoaming agent, 0.5% of organic silicon water repellent, 15% of acrylic acid redispersible latex powder, 0.5% of polycarboxylic acid high-efficiency water reducing agent, 0.07% of lithium sulfate, 0.08% of sodium citrate, 0.1% of low-viscosity HPMC, 13.4% of carborundum, 0.2% of ceramic fiber and 0.05% of polyacrylonitrile fiber.
Example 4
The component proportion of the quick repairing material for the airport apron is as follows: 45% of high belite sulphoaluminate cement, 1% of wollastonite powder, 10% of ceramic micropowder, 7% of mica powder, 0.4% of powder defoaming agent, 0.5% of organic silicon water repellent, 5% of acrylic acid redispersible latex powder, 0.5% of polycarboxylic acid high-efficiency water reducing agent, 0.1% of lithium sulfate, 0.1% of cane sugar, 0.1% of low-viscosity HPMC, 30% of carborundum, 0.1% of basalt fiber and 0.2% of polyvinyl alcohol fiber.
When the construction thickness is 2cm or less, the obtained rapid repair material can be directly added with water and stirred for independent use; if the thickness exceeds 2cm, the coarse aggregate (pebble) is added, and then water is added and stirred for use.
Test examples
Finding a machine path to be repaired, firstly cleaning loose objects and other impurities of a concrete base surface to be repaired, completely removing damaged parts of the base surface of the concrete base surface to be repaired by sanding or freeze-thawing until a solid base surface is exposed, and grinding the convex parts of the concrete base surface;
a notch with the depth of about 1cm and the width of the upper opening of about 1cm is formed along the crack, the repairing material prepared in the embodiments 1 to 4 is added with water and mixed for pre-repairing, a reinforcing net is laid on the top surface, and curing is carried out for 2 hours after the reinforcing net is hardened;
and (3) performing project inspection on the repaired notch material, and obtaining the following inspection results by adopting a calculation method specified in the general concrete mechanical property test:
TABLE 1 test results after repairing a gap to be repaired
As can be seen from table 1, the technical requirements of the repair materials prepared in embodiments 1 to 4 in the industry can meet the requirements of rapid repair, and can meet higher compressive strength, flexural strength and tensile strength, and the expansion rates of the repaired materials are lower, which indicates that the repair materials have better mechanical properties and durability.
Comparative example 1: the difference from the embodiment 1 is that HPMC with low viscosity and acrylic acid redispersible emulsion powder are not adopted, common HPMC and acrylic acid emulsion are changed, and the other parts are not changed, and the ground to be repaired is repaired according to the construction method;
comparative example 2: the difference from the embodiment 1 is that the heat-resistant fiber and the polymer fiber are not adopted, the polypropylene fiber is replaced, and the other parts are not changed, and the ground to be repaired is repaired according to the construction method;
and (3) performing project inspection on the repaired notch material, and obtaining the following inspection results by adopting a calculation method specified in the general concrete mechanical property test:
TABLE 2 examination results of the repaired gaps to be repaired
After the repair material prepared in the embodiment 1 is used for repairing, the compressive strength of the repair material can reach 20Mpa in 1 day, which is beneficial to accelerating the engineering progress; the water-impervious and water-impervious concrete with the pressure of 1.7Mpa meets the requirement of the impermeability of P16 concrete, and has good impermeability; the bonding strength between the high-strength repair material and the new and old concrete is more than 1.8Mpa, and the tight bonding between the high-strength repair material and the repair layer can be ensured to a certain extent.
As can be seen from Table 2, compared with the results of comparative example 1, the low viscosity HPMC and acrylic acid redispersible latex powder used in this example can improve the compression resistance and strength resistance of the patching material, and is not easy to deform and expand; compared with the results of comparative example 2, the heat-resistant fibers and the polymer fibers used in the embodiment have the effects of accelerating the solidification of the repairing material, enhancing the bonding strength, enhancing the compression resistance and the crack resistance, and thus, the rapid repairing material prepared in the embodiment can meet the requirement of rapid repairing of a machine way, and the repairing material can be effective for a long time.
Claims (4)
1. The quick repairing material for the airport parking apron is characterized by comprising high belite sulphoaluminate cement, wollastonite powder, ceramic micro powder, mica powder, a powder defoaming agent, an organic silicon water repellent, acrylic acid redispersible latex powder, a polycarboxylic acid high-efficiency water reducing agent, an early strength agent, a retarder, low-viscosity HPMC (hydroxy propyl methyl cellulose), a fine aggregate, heat-resistant fibers and polymer fibers;
the quick repairing material comprises, by mass, 30-45% of high belite sulphoaluminate cement, 1-10% of wollastonite powder, 10-30% of ceramic micro powder, 5-15% of mica powder, 0.1-0.5% of powder defoaming agent, 0.1-0.5% of hydrophobic agent, 5-15% of acrylic acid redispersible latex powder, 0.1-0.5% of polycarboxylic acid high-efficiency water reducing agent, 0.01-0.1% of early strength agent, 0.01-0.1% of retarder, 0.01-0.1% of low-viscosity HPMC, 10-30% of fine aggregate, 0.05-0.2% of heat-resistant fiber and 0.05-0.2% of polymer fiber;
the glass transition temperature of the acrylic acid redispersible latex powder is less than or equal to 8 ℃;
the drought strength agent comprises one or more of lithium carbonate and lithium sulfate;
the retarder comprises one or more of tartaric acid, sodium gluconate, sodium citrate and sucrose;
the heat-resistant fiber comprises one or more of sepiolite fiber, glass fiber, carbon fiber, ceramic fiber and basalt fiber;
the application particle size range of the wollastonite powder is 0.0375-0.15 mm;
the use particle size range of the ceramic micro powder is 0.0375-0.15 mm;
the mica powder has a particle size range of 0.0375-0.15 mm.
2. The rapid repair material of claim 1, wherein the rapid repair material comprises, by mass, 30 to 45% of high belite sulphoaluminate cement, 1 to 10% of wollastonite powder, 10 to 30% of ceramic micropowder, 5 to 15% of mica powder, 0.1 to 0.5% of powder defoamer, 0.1 to 0.5% of water repellent, 5 to 15% of acrylic acid redispersible latex powder, 0.1 to 0.5% of polycarboxylic acid high-efficiency water reducing agent, 0.01 to 0.1% of early strength admixture, 0.01 to 0.1% of retarder, 0.01 to 0.1% of low viscosity HPMC, 10 to 30% of fine aggregate, 0.05 to 0.2% of heat-resistant fiber, and 0.05 to 0.2% of polymer fiber.
3. The rapid repair material of claim 1 or 2, wherein the fine aggregate comprises silicon carbide.
4. The rapid repair material of claim 1 or 2, wherein the polymer fibers comprise one or more of polyester fibers, polypropylene staple fibers, polyacrylonitrile fibers, and polyvinyl alcohol fibers.
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| CN114573306A (en) * | 2020-12-02 | 2022-06-03 | 沈阳爱力科建材科技有限公司 | High-strength rapid-setting concrete repairing material and preparation method and application thereof |
| CN112321182B (en) * | 2020-12-03 | 2022-04-05 | 嘉华特种水泥股份有限公司 | Sulphoaluminate cement, cementing material and slurry for repairing airport runways |
| CN114133192A (en) * | 2021-11-29 | 2022-03-04 | 上海市建筑科学研究院有限公司 | High-strength rapid repairing material special for airport runway |
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