CN107859357B - Integrated construction device and method - Google Patents
Integrated construction device and method Download PDFInfo
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- CN107859357B CN107859357B CN201711328839.8A CN201711328839A CN107859357B CN 107859357 B CN107859357 B CN 107859357B CN 201711328839 A CN201711328839 A CN 201711328839A CN 107859357 B CN107859357 B CN 107859357B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4853—Epoxides
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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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
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- Chemical & Material Sciences (AREA)
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- Inorganic Chemistry (AREA)
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Abstract
The invention relates to an integrated construction device and an integrated construction method, wherein the integrated construction device is used for repairing and protecting a damaged or deteriorated concrete surface layer and comprises an impregnation cavity (11), negative pressure equipment (9) and a liquid storage tank (8), the impregnation cavity (11) comprises a cover plate (6) and a cushion layer (4), and the cover plate (6) and the cushion layer (4) are used for enclosing a sealing cavity for filling impregnation liquid (110) together with the concrete surface layer (10); the negative pressure equipment (9) is connected with the dipping cavity (11), and the negative pressure equipment (9) is used for providing negative pressure for the sealing cavity; the liquid storage tank (8) is connected with the dipping cavity (11), and the liquid storage tank (8) is used for storing dipping liquid (110). According to the invention, the protective layer is formed on the surface of the concrete while the concrete surface is repaired, so that the repair and protection of the concrete surface are realized simultaneously through one-time construction.
Description
Technical Field
The present invention relates to an integrated construction device and an integrated construction method, and more particularly, to an integrated construction device and a method for simultaneously repairing and protecting a concrete surface layer by vacuum polymer impregnation of a damaged or deteriorated concrete building surface layer.
Background
The climate conditions in western regions of China are very severe: the method has the advantages of hot summer, dry and cold winter, large temperature difference, high wind speed, low relative humidity and the like, and brings great threat to the durability of the local concrete structure. According to the results of on-site investigation of concrete buildings in western regions of China by relevant students, cracks, surface degradation and steel bar corrosion are visible everywhere in built concrete channels, bridges, roads and the like, the safety and service life of the structures are seriously affected, and huge economic losses are brought to China. A survey of the last century of the construction department in China shows that most of industrial buildings in China need to be overhauled after being used for 25-30 years, and the service life of the buildings in a severe environment is only 15-20 years.
The mechanical property and durability of the polymer impregnated concrete are better than those of common concrete, so that students at home and abroad try to repair the surface layer of the damaged concrete structure by adopting an impregnation method. Some students used an atmospheric reservoir impregnation method (cofferdam reservoir method) to carry out the impregnation. However, the normal pressure liquid storage method has the defects of complex process, low efficiency, unrecoverable repair slurry, easy environmental pollution and incapability of being applied to vertical surface or inclined surface construction. In the prior art, the flexible negative pressure cavity is adopted to carry out dipping repair on the concrete building, and although the method is improved to a certain extent compared with a liquid storage method, the following defects still exist when the method is used for repairing and protecting the aged concrete building:
1. the impregnating solution in the flexible negative pressure impregnating cavity has no residue and no residual monomer, so that the protection of the concrete surface layer is not ideal. The flexible negative pressure impregnation process only plays a certain role in repairing surface defects of a concrete building, and has serious damage and degradation, and the surface of a hollow can not achieve an ideal old repair effect like a new effect; after the impregnation is finished, the subsequent working procedures such as trowelling, repeated smearing and the like are needed to be carried out so as to improve the appearance and realize the protection;
2. the construction process is complicated. The pad and the fixed pad are required to be paved before impregnation, the pad is required to be removed after the impregnation liquid is solidified, the process is complex, and the construction of a vertical surface or an inclined surface with a larger gradient is particularly inconvenient;
3. the dipping efficiency is low, and the dipping repair can not be realized by 100% of the area in the dipping cavity. For large-area construction, the thin film is tightly attached to the repair surface during impregnation, so that the flow path of the introduced impregnating solution in the vacuum cavity is difficult to control, impregnating dead zones are easily formed in the peripheral area, the impregnating area only accounts for about 90% of the coverage area of the impregnating cavity, and the remaining 10% of the area can only be manually smeared and repaired subsequently, so that the construction progress and the repair effect are affected;
4. the vacuum degree in the impregnation cavity is low, and the repairing effect on concrete is limited. For the negative pressure dipping process, the higher the vacuum degree in the vacuum cavity before the dipping liquid is introduced, the more favorable is the discharge of air in the crack of the repairing surface and the introduction and penetration of slurry, and the best repairing effect is achieved. The low vacuum degree in the impregnation cavity leads to low impregnation depth of the impregnation liquid in the concrete, so that the repair and reinforcement of the concrete are limited; meanwhile, the impregnation liquid can not be sucked into cracks almost when the vertical face is constructed due to low vacuum degree.
Disclosure of Invention
In order to solve the problems, the invention provides an integrated construction device and a construction method for simultaneously repairing and protecting a concrete surface layer by carrying out vacuum polymer impregnation on the damaged or deteriorated concrete building surface layer.
In order to accomplish the above object, the present invention provides an integrated construction apparatus for repairing and protecting a damaged or deteriorated concrete surface layer, comprising: the impregnating cavity comprises a cover plate and a cushion layer, and the cover plate and the cushion layer are used for enclosing a sealing cavity for filling impregnating liquid together with the concrete surface layer; the negative pressure equipment is connected with the dipping cavity and is used for providing negative pressure for the sealing cavity; the liquid storage tank is connected with the dipping cavity and used for storing dipping liquid.
Preferably, the cover plate is a high-molecular elastic plate, the cushion layer is a flexible rubber sealing cushion layer with adjustable thickness, the cushion layer is in sealing connection with the concrete surface layer, and the cover plate is in sealing connection with the cushion layer.
Preferably, the cover plate is provided with at least one negative pressure interface capable of being in sealing connection with one end of the negative pressure conduit and at least one liquid guide interface capable of being in sealing connection with one end of the liquid guide conduit, the other end of the negative pressure conduit is connected with the negative pressure equipment, the other end of the liquid guide conduit is connected with the liquid storage tank, and the cover plate is also provided with at least one standby interface.
Further preferably, the negative pressure interface, the liquid guide interface and the standby interface are all external interfaces.
Further preferably, the negative pressure conduit is provided with a negative pressure throttle valve, and the liquid guide conduit is provided with a liquid guide throttle valve.
Preferably, a cushion block is arranged in the sealing cavity and is made of a high polymer material.
Preferably, the connecting positions of the cover plate and the cushion layer are connected through a sealing structure, and the sealing structure comprises a double-sided adhesive layer and a flexible sealing material layer.
Meanwhile, the invention also provides an integrated construction method for repairing and protecting the damaged or deteriorated concrete surface layer, which comprises the following steps:
firstly, covering a concrete surface layer to be repaired by using an impregnation cavity, wherein the impregnation cavity comprises a cover plate and a cushion layer, and the cover plate, the cushion layer and the concrete surface layer enclose a sealed cavity together; then, starting negative pressure equipment, opening a liquid guide throttle valve after the required vacuum degree is achieved in the sealed cavity, and closing the negative pressure throttle valve at the same time, so that impregnating liquid in the liquid storage tank is led into the sealed cavity through a liquid guide pipe to repair and protect the surface layer of the concrete; and finally, solidifying the impregnating solution to form a repair layer, and removing the cover plate and the cushion layer.
Preferably, the impregnating solution is a methyl methacrylate-based modified system and an epoxy resin system:
the methyl methacrylate-based modification system includes: 100ml of methyl methacrylate, 20-30 ml of butyl methacrylate, 10-25 ml of methacrylic acid, 1-3 g of p-toluene sulfinic acid, 0.5-2 g of dibenzoyl peroxide, 1-3 g of N, N-dimethylaniline, 5-10g of inorganic filler and 1-5 g of modifier;
the epoxy resin system comprises: 100 parts of epoxy resin body, 33-38 parts of curing agent and 25-30 parts of diluent.
Preferably, a cushion block (3) is arranged in the sealing cavity, a repairing layer is formed after the impregnating solution is solidified, and after the cover plate (6) and the cushion layer (4) are removed, the cushion block (3) is remained in the solidified repairing layer, and the vacuum degree is 30-750 mmHg.
The invention has the beneficial effects that:
1. the concrete surface layer repairing and protecting integrated construction is realized, namely, the defect repairing of the concrete surface layer and the shallow layer is realized, and meanwhile, a layer of protecting layer with controllable thickness, smoothness and flatness is formed on the original concrete surface, so that the concrete is prevented from being further damaged by aggressive environment and other adverse factors, and the repairing effect is realized, and meanwhile, the protecting and attractive effects are realized.
2. The construction process is simple and quick: an elastic high polymer plate and a simple edge sealing process are adopted to form a near-rigid impregnation cavity; the cushion is not required to be paved before dipping, only cushion blocks are required to be paved at a plurality of positions in the dipping cavity, the cushion blocks are not required to be taken out after the dipping is finished and the working procedures of paving the cushion and uncovering the cushion are saved, meanwhile, the working procedures of manually trowelling and repeatedly smearing the subsequent surface are also omitted in the integrated construction process, and all the working procedures can be completed through one-time dipping.
3. The dipping efficiency is high, and the region in the vacuum cavity can reach 100% dipping coverage. The device ensures the space required by liquid flowing and accumulation, can ensure the rapid introduction of the impregnating solution in the operable time during large-area construction, can realize complete impregnation in the cavity, and has no construction dead angle.
4. The vacuum degree in the vacuum cavity is high. Adopts a simple and reliable edge sealing technology and a large vacuum negative pressure workstation, and the ultimate vacuum degree in the vacuum cavity is 750mmHg and is adjustable as required.
5. The dipping construction process is safe, economical and environment-friendly. The quick and flexible external hot plug connector mode is adopted, so that the air suction and liquid inlet impregnation according to the needs can be realized; meanwhile, zero loss of the impregnating solution under the vacuum condition is realized, namely no impregnating solution flows out in construction, no impregnating solution is required to be recovered after construction, environmental pollution is avoided, and secondary impregnation or repeated impregnation can be performed at any time when accidents occur in the construction process.
Drawings
Fig. 1 is a schematic view of an integrated construction apparatus according to the present invention.
Fig. 2 is a schematic view of another angle of the integrated construction device of the present invention.
Description of the reference numerals
1-a liquid guide interface; 20-a liquid-guiding throttle valve; 21-a negative pressure throttle valve; 3-cushion blocks; 4-cushion layer;
5-negative pressure interface; 6-cover plate; 7-a standby interface; 8-a liquid storage tank; 9-negative pressure equipment;
10-concrete surface layer; 11-an impregnation chamber; 110-impregnating solution; 120-negative pressure conduit;
121-a liquid guide tube; 13-concrete cracks.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 and 2, the impregnation chamber 11 includes a cover plate 6 and a cushion layer 4, and the cover plate 6, the cushion layer 4 and a concrete surface layer 10 together enclose a sealed chamber. The cover plate 6 is a polymer elastic plate, for example, a common polymer elastic plate is a PVC plate, a plate made of rubber, a plastic plate and the like, and the cushion layer 4 is a flexible rubber sealing cushion layer with adjustable thickness. The cushion layer 4 and the concrete surface layer 10 are connected in a sealing manner. The cover plate 6 is in sealing connection with the cushion layer 4. The cover plate 6 has a thickness of 1 mm to 2 mm. The cover plate 6 is provided with a liquid guide interface 1, a negative pressure interface 5 and a standby interface 7. The interfaces can be external interfaces with uniform specifications, the positions of the interfaces are flexible and changeable in the interface mode, the positions of the interfaces can be arranged according to actual conditions, and meanwhile, the interfaces are convenient to operate due to the uniform specifications, and specific distinguishing of the liquid guide interface 1 and the negative pressure interface 5 is not needed. Preferably, the dipping cavity 11 is internally provided with a cushion block 3, the cushion block 3 is a polymer cushion block, common materials for manufacturing the polymer cushion block are rubber, resin, plastic and the like, and the cushion block 3 is placed at a place of the cover plate 6, which is collapsed due to vacuum pumping. The negative pressure device 9 is in sealing connection with the negative pressure interface 5 on the cover plate 6 through a negative pressure conduit 120, a negative pressure throttle valve 21 is arranged on the negative pressure conduit 120, and the negative pressure throttle valve 21 is used for controlling the negative pressure in the elastic impregnation cavity 11. The liquid storage tank 8 is connected with the liquid guide interface 1 on the cover plate 6 in a sealing way through a liquid guide pipe 121, a liquid guide throttle valve 20 is arranged on the liquid guide pipe 121, and the liquid guide throttle valve 20 is used for controlling the flow of the impregnating liquid 110 which is input into the elastic impregnating cavity 11. The sealing material used for the sealing connection comprises a double-sided adhesive layer and a flexible sealing material layer, and common sealing materials include aramid fiber, carbon fiber, graphite wire, high water-based fiber and the like.
The specific working steps of this embodiment are as follows:
1. pretreatment of a construction surface: the construction surface is treated, attachments such as stains, soil, moss, old repairing layers and the like on the surface of the concrete layer 10 are removed by using an angle grinder, and floating ashes remained on the surface and in cracks after polishing are sucked and removed by using a negative pressure device 9. The wet surface needs to be dried, and the next procedure is carried out after the concrete is dried. Loose fragments should be removed for damaged, severely degraded surfaces.
2. And (3) sealing and arranging an immersion cavity: the concrete skin 10 to be repaired is covered with an impregnation chamber 11, the impregnation chamber 11 comprising a cover plate 6 and a cushion layer 4, the cover plate 6, the cushion layer 4 and the concrete skin 10 forming a sealed cavity. The specific operation mode is as follows: and the epoxy repair material is used for repairing defects such as cracks, hollows and the like at the sealing position of the impregnation cavity 11, so that the edge sealing position is smooth, and no gas leakage exists. The cushion layer 4 and the cover plate 6 are sequentially fixed by mechanical or gluing and the like to form a closed sealing cavity. A small number of pads 3 are uniformly arranged inside the impregnation chamber 11 to prevent excessive deformation of the sheet material. The cover plate 6 is provided with a liquid guide interface 1, a negative pressure interface 5 and a standby interface 7.
3. Vacuum degree test: the external negative pressure equipment 9 is connected into the dipping cavity 11 for testing, the negative pressure equipment 9 is started, the vacuum degree in the cavity is ensured to be not less than 0.09Mpa, and the vacuum degree can be independently maintained for more than 5 minutes after the negative pressure throttle valve 21 cuts off the negative pressure conduit 120.
4. Preparing an impregnating solution: the choice of impregnating solution 110 satisfies the following four criteria: (1) The polymer monomer and the mixed system have low viscosity and high boiling point, and not only can meet the requirements of high fluidity and high permeability, but also can not be boiled and evaporated vigorously under the vacuum degree required by construction; (2) The impregnating solution mixed system can be cured in a short time under normal temperature and vacuum conditions; (3) The impregnating solution has the characteristics suitable for being used as a surface protective material after being solidified, such as impermeability, freezing resistance, high weather resistance, high abrasion resistance and the like; (4) If the concrete building surface is seriously damaged/degraded and macro cracks are more, a polymer monomer with slightly higher viscosity, such as an epoxy resin system (100 parts by weight of an epoxy resin body, 33-38 parts by weight of a curing agent and 25-30 parts by weight of a diluting agent; for example, 140g of the epoxy resin body, 50g of the curing agent and 40g of the diluting agent are preferable); if the surface damage is slight, a low viscosity methyl methacrylate system may be selected. The impregnating solution 110 is ready to use and is introduced into the impregnating chamber 11 within an operable time frame, and the reservoir 8 may be cooled in water if necessary to extend the operable time. Taking methyl methacrylate-based modification systems as an example, it comprises: 100ml of methyl methacrylate, 20-30 ml of butyl methacrylate, 10-25 ml of methacrylic acid, 1-3 g of p-toluene sulfinic acid, 0.5-2 g of dibenzoyl peroxide, 1-3 g of N, N-dimethylaniline, 5-10g of inorganic filler, 1-5 g of modifier and the like.
5. Introducing an impregnating solution: and starting the negative pressure equipment 9, opening the liquid guide throttle valve 20 after the required vacuum degree is reached in the sealed cavity, and closing the negative pressure throttle valve 21 at the same time, so that the impregnating liquid 110 in the liquid storage tank 8 is led into the sealed cavity through the liquid guide pipe 121 to repair and protect the concrete surface layer 10. After the dipping solution 110 fills the dipping chamber 11, the liquid guiding throttle valve 20 cuts off the liquid guiding pipe 121 and waits for the dipping solution 110 to be initially coagulated under the vacuum condition.
6. Removing: the impregnating solution 110 is solidified to form a repair layer, and the cover plate 6 and the cushion layer 4 are removed. Specifically, the negative pressure equipment 9 can be removed after the impregnating solution 110 is initially set, and the cover plate 6 and the cushion layer 4 can be removed after 24 hours for further use; the cushion block 3 is not required to be taken out and is remained in the solidified repairing layer. The cushion block 3 plays a structural stabilization role on the sealed cavity, and the problem that the structure of the impregnation cavity 11 collapses when the vacuum degree is overlarge is avoided. In addition, after the repair layer is solidified, the pad 3 is not taken out and becomes a part of the repair layer, and the pad 3 can play a structural stabilizing role on the repair layer. In addition, in order to increase the stabilization of the patch 3 by the patch 3, a plurality of elongated flexible extensions may be disposed on the patch 3, which may be distributed within the patch to enhance the structural stabilization of the patch.
After construction, the surface concrete of the building has obviously improved performances, and the surface protection layer is attractive and elegant and has excellent protection performance. The results of the comparative tests on the concrete test blocks before and after dipping are shown in the following table, the mechanical properties of the damaged/deteriorated concrete test blocks are greatly improved after being repaired by a vacuum dipping construction process, the compressive strength recovery rate is more than 70%, the splitting strength recovery rate is more than 90%, and the structural reinforcement effect is obvious; as can be seen from comparison of test results of carbonization prevention, chloride ion permeation resistance, anti-abrasion experiments and the like, the protection effect of the process on the concrete surface is very outstanding, and the continuous permeation of components which cause the degradation of the concrete can be basically stopped under the condition that the erosion environment cannot be changed; in addition, the impregnating solution has the characteristics of high weather resistance, high abrasion resistance and the like suitable for being used as a surface layer protective material, so that the repair and protection integrated function is realized.
The following table is a comparison table of the performance of the methyl methacrylate-based modified impregnating solution before and after repair, and it can be seen from these data that the parametric compressive strength (Mpa) and the cleavage strength (Mpa) are significantly improved after impregnation reinforcement.
TABLE 1 comparison of the Performance of the methyl methacrylate-based modified impregnating solutions before and after repair
The working surface of the invention is not limited by the shape, and common concrete building surfaces such as planes, inclined planes, vertical planes, cylindrical surfaces and the like can be constructed, so that the invention has wide application range and strong adaptability.
The process adopts an elastic impregnation cavity, and can realize rapid introduction of impregnation liquid and full coverage of an impregnation area by adopting a simple construction process; the impregnating slurry has high permeability, can penetrate into the interior of a concrete structure to repair defects and cracks, and forms a protective layer with controllable thickness on the surface, so that the repair and protection integration of the surface layer of the concrete structure is realized. The technology has wide application prospect in the fields of repairing cracks of overflow dam surfaces of concrete dams, repairing and protecting the surface layers of roads and bridges, repairing and protecting concrete thin-wall structures in severe environment areas, and the like.
In addition, the choice of the impregnating solution used in the invention depends on the damage degree/aging state of the building surface, and different impregnating solutions are chosen according to different surface conditions; the color of the impregnating solution can be adjusted according to the requirement, for example, the color close to the color of the building body can be selected, so that the color after repair is coordinated with the primary color of the building, and the beautiful effect is realized. Moreover, the working surface is not limited by the shape, and the common concrete building surfaces such as planes, inclined planes, vertical planes, cylindrical planes and the like can be applied.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (3)
1. A method of an integrated construction device for repairing and protecting a damaged or deteriorated concrete skin, comprising an integrated construction device for repairing and protecting a damaged or deteriorated concrete skin, the integrated construction device comprising:
the impregnating cavity (11), the impregnating cavity (11) comprises a cover plate (6) and a cushion layer (4), and the cover plate (6) and the cushion layer (4) are used for enclosing a sealing cavity for filling impregnating liquid (110) together with a concrete surface layer (10);
the negative pressure equipment (9), the negative pressure equipment (9) is connected with the dipping cavity (11), and the negative pressure equipment (9) is used for providing negative pressure for the sealing cavity;
the liquid storage tank (8), the liquid storage tank (8) is connected with the dipping cavity (11), and the liquid storage tank (8) is used for storing dipping liquid (110);
the cover plate (6) is a high-molecular elastic plate, the cushion layer (4) is a flexible rubber sealing cushion layer with adjustable thickness, the cushion layer (4) is in sealing connection with the concrete surface layer (10), and the cover plate (6) is in sealing connection with the cushion layer (4);
the cover plate (6) is provided with at least one negative pressure interface (5) capable of being in sealing connection with one end of a negative pressure conduit (120) and at least one liquid guide interface (1) capable of being in sealing connection with one end of a liquid guide conduit (121), the other end of the negative pressure conduit (120) is connected with negative pressure equipment (9), the other end of the liquid guide conduit (121) is connected with the liquid storage tank (8), and the cover plate (6) is also provided with at least one standby interface (7);
the negative pressure guide pipe (120) is provided with a negative pressure throttle valve (21), and the liquid guide pipe (121) is provided with a liquid guide throttle valve (20);
a cushion block (3) is arranged in the sealing cavity, and the cushion block (3) is a high polymer material cushion block;
the connecting position of the cover plate (6) and the cushion layer (4) is connected through a sealing structure, and the sealing structure comprises a double-sided adhesive layer and a flexible sealing material layer;
the method comprises the following steps:
firstly, covering a concrete surface layer (10) to be repaired by an impregnation cavity (11), wherein the impregnation cavity (11) comprises a cover plate (6) and a cushion layer (4), and the cover plate (6), the cushion layer (4) and the concrete surface layer (10) enclose a sealed cavity together;
then, starting negative pressure equipment (9), opening a liquid guide throttle valve (20) after the required vacuum degree is achieved in the sealed cavity, and simultaneously closing a negative pressure throttle valve (21), so that impregnating liquid (110) in a liquid storage tank (8) is led into the sealed cavity through a liquid guide pipe (121), and repairing and protecting a concrete surface layer (10);
finally, the impregnating solution (110) is solidified to form a repair layer, and the cover plate (6) and the cushion layer (4) are removed;
repairing cracks and cavity defects at the sealing position of the impregnation cavity (11) by using an epoxy repair material to ensure that edge sealing positions are smooth, no gas leakage exists, sequentially fixing the cushion layer (4) and the cover plate (6) in a mechanical and adhesive mode to form a closed sealing cavity, and uniformly arranging a small number of cushion blocks (3) in the impregnation cavity (11) to prevent excessive deformation of the plate;
starting negative pressure equipment (9), opening a liquid guide throttle valve (20) after the required vacuum degree is reached in the sealed cavity, closing a negative pressure throttle valve (21) at the same time, leading impregnating liquid (110) in a liquid storage tank (8) into the sealed cavity through a liquid guide pipe (121), repairing and protecting a concrete surface layer (10), and waiting for initial setting of the impregnating liquid (110) under the vacuum condition after the impregnating liquid (110) fills the impregnating cavity (11) and the liquid guide throttle valve (20) cuts off the liquid guide pipe (121);
a cushion block (3) is arranged in the sealing cavity, a repair layer is formed after the impregnating solution is solidified, and the cushion block (3) is reserved in the solidified repair layer after the cover plate (6) and the cushion layer (4) are removed;
the vacuum degree is 30-750 mmHg.
2. The method of an integrated construction device according to claim 1, wherein the impregnating solution (110) is a methyl methacrylate-based modified system or an epoxy resin system:
the methyl methacrylate-based modification system comprises: 100ml of methyl methacrylate, 20-30 ml of butyl methacrylate, 10-25 ml of methacrylic acid, 1-3 g of p-toluene sulfinic acid, 0.5-2 g of dibenzoyl peroxide, 1-3 g of N, N-dimethylaniline, 5-10g of inorganic filler and 1-5 g of modifier;
the epoxy resin system comprises: 100 parts of an epoxy resin body, 33-38 parts of a curing agent and 25-30 parts of a diluent.
3. The method of an integrated construction device according to claim 1, wherein the negative pressure interface (5), the liquid guiding interface (1) and the standby interface (7) are external interfaces.
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