WO2021100899A1 - Composition d'elastomère composite, couche de renforcement structurale, et procédé de construction à l'aide d'une composition d'elastomère composite - Google Patents

Composition d'elastomère composite, couche de renforcement structurale, et procédé de construction à l'aide d'une composition d'elastomère composite Download PDF

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WO2021100899A1
WO2021100899A1 PCT/KR2019/015915 KR2019015915W WO2021100899A1 WO 2021100899 A1 WO2021100899 A1 WO 2021100899A1 KR 2019015915 W KR2019015915 W KR 2019015915W WO 2021100899 A1 WO2021100899 A1 WO 2021100899A1
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layer
equation
composite
elastic layer
composite elastic
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PCT/KR2019/015915
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Korean (ko)
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송준혁
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송준혁
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    • 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
    • C08K7/14—Glass
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/02—Polyureas
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/80—Processes for incorporating ingredients

Definitions

  • the present invention relates to a composite elastomer composition, a structure reinforcing layer, and a method for constructing a composite elastomer, and more specifically, to form a composite elastomer in which glass fibers, which are fine powder fibers, are mixed with polyurea, and the surface of the structure
  • polyurea is a type of elastic body and has excellent tensile, toughness, and ductility properties in addition to waterproofing.
  • An object of the present invention is to solve the conventional problem, by forming a composite elastomer in which glass fiber, which is a fiber of fine powder, is mixed with polyurea, and applying it to the surface of a structure, external factors including external loads or impacts, etc. It is to provide a composite elastomer composition, a structure reinforcing layer, and a method of constructing a composite elastomer that can improve the structural performance, seismic performance, and explosion-proof performance of the structure deteriorated due to these factors.
  • the composite elastomer composition according to the present invention comprises a liquid polyurea; And glass fibers in the form of fine powders mixed with the polyurea, wherein 6 to 15% by weight of the glass fibers are mixed based on 100% by weight of the polyurea.
  • the composite elastomer composition according to the present invention comprises a liquid polyurea; And glass fibers in the form of fine powders to be mixed with the polyurea, wherein 8.5 to 25.5 vol% of the glass fibers are mixed with respect to 100 vol% of the polyurea.
  • the density of the glass fibers is 0.55 to 0.60 g/cc, and the moisture content of the glass fibers is less than 0.08%.
  • the structure reinforcing layer according to the present invention includes a base layer applied to the surface of the structure; And a composite elastic layer applied to the undercoat layer, wherein the composite elastic layer includes the composite elastomer composition according to claim 1 or 2.
  • the thickness of the composite elastic layer is set through any one of a flexural reinforcement design formula and a shear reinforcement design formula according to a reinforcing purpose.
  • the thickness of the composite elastic layer is made of 2 to 10 mm.
  • the flexural reinforcement design formula Is at least 20 ego, Assuming the following (Equation 1-1) is satisfied, Satisfies the following (Equation 1-2) for, With respect to the following (Equation 1-3), and (Equation 1-4) And preset Repeatedly until you are satisfied with your relationship Correct the expected value of.
  • the structure reinforcing layer according to the present invention includes an intermediate layer applied between the undercoat layer and the composite elastic layer; And a top coat layer applied to the composite elastic layer. It further includes at least any one of.
  • the method of constructing the composite elastomer according to the present invention comprises: a ground treatment step of removing foreign substances from the surface of a structure for constructing the composite elastomer composition according to the present invention; And a painting step of applying the composite elastomer composition to the surface of the structure after passing through the base treatment step, wherein the painting step includes, after the base treatment step, a undercoat layer on the surface of the structure. Forming a primer step; And a composite elastic step of forming a composite elastic layer on the surface of the undercoating layer after passing through the undercoating step, wherein the composite elastic layer includes the composite elastomer composition.
  • the painting step prior to the composite elastic step, the intermediate step of forming a thickening layer on the surface of the undercoat layer; And a top coat step of forming a top coat layer on the surface of the composite elastic layer after passing through the composite elastic step. It further includes at least any one of.
  • a composite elastomer is formed in which glass fibers, which are finely powdered fibers, are mixed with polyurea, and then applied to the surface of the structure. Structural performance, seismic performance, and explosion-proof performance of the structure deteriorated due to external factors including load or impact can be improved.
  • the present invention can be easily applied to the entire surface of the structure as well as to the local surface that needs reinforcement in the structure, it is economical and cost-saving, and shows the rapidity of the application process. Due to the deteriorated structure, it is possible to maintain the structural performance, earthquake resistance, and explosion-proof performance of the composite elastomer.
  • the present invention uses a composite elastomer in which glass fiber is mixed with polyurea, so that the thickness of the coating depends on the required strength. It facilitates design and control, and can improve strength and ductility in the reinforcing layer.
  • the present invention is easier to construct than steel plate reinforcement or carbon fiber sheet reinforcement when reinforcing the strength through the safety diagnosis of the structure, and since the required proof strength is determined only by the reinforcing thickness, it is possible to economically perform strength reinforcement.
  • It can increase the application value of composite elastomers.
  • by being applied to the surface of structures (especially, exterior decorative finishes such as masonry, tiles, curtain walls, etc.) damaged by earthquakes it is possible to sufficiently prevent dropping, and propose an economical and simple construction technique.
  • the application of composite elastomers can be increased.
  • the present invention limits the mixing ratio of polyurea and glass fiber, so that when applying the composite elastomer composition to the surface of the structure, the flexural strength, shear strength, ductility, and explosion-proof performance of a structure (especially a concrete structure) that is a brittle material. It is easy to construct, and is efficient in shortening the construction period.
  • the present invention limits the mixing ratio of polyurea and glass fiber, so that when the composite elastomer composition forms the composite elastic layer, the tensile strength of the structure or the composite elastic layer is 20 to 30 N/mm 2 , and the structure is broken. Alternatively, it may exhibit an elongation of 350 to 380% of the composite elastic layer, and an adhesive performance of 2.2 to 2.5 N/mm 2 or more of the composite elastic layer in the structure.
  • the present invention applies any one of a flexural reinforcement design formula and a shear reinforcement design formula according to the purpose of reinforcement, thereby corresponding to the characteristics of the structure to which the structural reinforcing layer is applied.
  • the thickness of the material can be easily adjusted, and the misuse of materials can be prevented in forming the structural reinforcing layer.
  • the present invention stabilizes the flexural reinforcement of the structure through the flexural reinforcement design formula, and can easily set the flexural reinforcement thickness corresponding to the structure to be applied.
  • the present invention stabilizes the shear reinforcement of the structure through the shear reinforcement design formula, and can easily set the shear reinforcement thickness corresponding to the structure to be applied.
  • the strength and ductility of the structure can be improved in response to the deterioration of the structure.
  • the present invention facilitates reinforcement of the strength of the structure through the undercoat layer, and can improve the adhesion of the intermediate layer or the composite elastic layer laminated on the undercoat layer.
  • the present invention can improve the durability and crack resistance of the structure through the intermediate layer, and improve the adhesion between the undercoat layer and the composite elastic layer.
  • the present invention can contribute to improving the performance of the structure through the composite elastic layer, and can improve the adhesion between the undercoat layer and the upper coat layer, and between the intermediate layer and the upper coat layer.
  • the present invention can improve the weather resistance, abrasion resistance, chemical resistance, fire resistance, etc. of the structure while finishing the surface of the structure through the top coat layer.
  • FIG. 1 is a cross-sectional view showing a state in which a structure reinforcing layer according to an embodiment of the present invention is applied to a structure.
  • FIG. 2 is an enlarged cross-sectional view showing a detailed stacking state of a structural reinforcing layer according to an embodiment of the present invention.
  • FIG. 3 is a flow chart showing a method of constructing a composite elastomer according to an embodiment of the present invention.
  • the composite elastomer composition according to an embodiment of the present invention is included in the construction method of the structure reinforcing layer according to an embodiment of the present invention and the composite elastomer according to an embodiment of the present invention.
  • the composite elastomer composition according to an embodiment of the present invention is included in the construction method of the structure reinforcing layer according to an embodiment of the present invention and the composite elastomer according to an embodiment of the present invention.
  • the structural reinforcing layer 20 may be applied to the structure 10 to improve structural performance, seismic performance, and explosion-proof performance of the structure 10.
  • the structural reinforcing layer 20 according to an exemplary embodiment of the present invention restores the performance of the structure 10 degraded due to external factors including external loads or impacts, while improving ductility and resistance to earthquakes. Can be improved.
  • the structure reinforcing layer 20 includes a lower coat layer 21 and a composite elastic layer 23, and further includes at least one of the middle coat layer 22 and the upper coat layer 24. I can.
  • the undercoat layer 21 is applied to the surface of the structure 10.
  • the surface of the structure 10 may be surface-treated through the background treatment step S1 to be described later.
  • the undercoating layer 21 is applied to the surface of the structure 10 through an undercoating step (S21) to be described later.
  • the structure 10 is expressed as a concrete structure, but it is not limited thereto, and the structure 10 is a concrete structure, a non-bearing structure, a bridge pier or beam, a masonry for external decoration, an exterior wall finishing material. , It may represent a variety of known forms such as a frame of a curtain wall.
  • a reinforcing portion 11 requiring reinforcement may be formed to protrude in the structure 10.
  • the composite elastic layer 23 is applied to the undercoat layer 21.
  • the composite elastic layer 23 includes the composite elastomer composition according to an embodiment of the present invention.
  • the composite elastic layer 23 is applied to the undercoat 21 or the intermediate layer 22 on the surface of the structure 10 through the composite elastic step S23 to be described later.
  • the composite elastomer composition according to an embodiment of the present invention is a mixture of polyurea and glass fiber, and is a seismic material for the structure 10 applicable to the spraying method and a structural reinforcing material for the structure, and improves the performance of the structure 10. Through this, it is possible to improve the maintenance work of the structure 10.
  • the composite elastomer composition according to an embodiment of the present invention can improve the properties (high ductility, high toughness) of polyurea, suppress or prevent deterioration of polyurea, and expand or contract polyurea. It improves the resistance to action and can apply high-temperature and high-pressure spraying technology as a spraying method.
  • the composite elastomer composition according to an exemplary embodiment of the present invention may improve the strength and ductility due to the elastic body, thereby imparting a function of improving structural performance and seismic performance of the structure 10.
  • the composite elastomer composition according to an embodiment of the present invention improves the strength and strength of the structure 10 due to the constraining effect on the deformation of the structure 10, and the bending behavior and structural performance of the structure 10
  • a seismic function is given to the structure 10, and since it is not affected by the material of the structure 10, it can be applied to concrete as well as glass, brick, and wood. When it occurs, it can improve the energy dissipation ability and improve the explosion-proof performance.
  • the composite elastomer composition according to an embodiment of the present invention may include a liquid polyurea and glass fibers mixed with the polyurea.
  • Polyurea consists of a reaction of a prepolymer formed by polymerization of a polyol and an isocyanate and a compound curing agent compound having an amine group, preferably a primary reaction of a polyol (30-70 wt%) and an isocyanate (30-70 wt%). Reaction (Urethane reaction) and a secondary reaction (Urea reaction) to synthesize a polymer compound divided by the reaction of the first reaction completed material (30-70 wt%) and an amine compound (30-70 wt%). It can be done.
  • the polyurea is not limited to the above description, and various types of known polyurea may be applied.
  • Glass fiber is an additive that increases the strength of the structure by mixing it with polyurea and spraying and coating it on the surface of the structure.
  • the fine powder glass fiber can exhibit an average particle diameter of 13.5 micrometers and an average length of 300 micrometers.
  • the glass fiber may be mixed with 6 to 15% by weight based on 100% by weight of polyurea.
  • the glass fiber when the glass fiber is added less than 6% by weight, the improvement of the properties of the polyurea is insufficient, and when the glass fiber is larger than 15% by weight, the glass fiber is changed into a factor that hinders the properties of the polyurea.
  • the properties of polyurea are improved, so that the tensile strength of the structure or composite elastic layer is 20 to 30 N/mm 2 , the elongation rate of the structure or composite elastic layer when the structure is broken is 350 to 380 %, and the structure In the composite elastic layer, the adhesive performance of 2.2 ⁇ 2.5 N/mm 2 or more, and more specifically, the adhesive performance of 2.3 N/mm 2 or more, can be exhibited.
  • the glass fiber may be mixed with 8.5 to 25.5% by volume based on 100% by volume of polyurea.
  • the glass fiber when the glass fiber is added less than 8.5% by volume, the improvement of the properties of the polyurea is insufficient, and when the glass fiber is larger than 25.5% by volume, the glass fiber is changed into a factor that hinders the properties of the polyurea.
  • the properties of polyurea are improved, so that the tensile strength of the structure or composite elastic layer is 20 to 30 N/mm 2 , the elongation rate of the structure or composite elastic layer when the structure is broken is 350 to 380 %, and the structure In the composite elastic layer, the adhesive performance of 2.2 ⁇ 2.5 N/mm 2 or more, and more specifically, the adhesive performance of 2.3 N/mm 2 or more, can be exhibited.
  • These glass fibers may exhibit a fine powder solid form.
  • the density of the glass fibers may represent 0.55 ⁇ 0.60 g / cc. More specifically, the density of the glass fibers may represent 0.57 ⁇ 0.59 g / cc. Preferably, the density of the glass fibers may represent 0.58 g/cc. Accordingly, as a characteristic of the glass fiber, it is possible to increase the tensile strength of the polyurea, increase the elongation rate of the polyurea, and reduce the shrinkage rate of the polyurea.
  • the size of the glass fiber is relatively large, so when the glass fiber is sprayed while being mixed with polyurea, the glass fiber is stagnated in the spray nozzle and the mixing ratio of the polyurea and the glass fiber is reduced. It can be changed, and when the density of the glass fiber is greater than the maximum value, the size of the glass fiber is relatively small, and thus the properties of the glass fiber according to an embodiment of the present invention are not exhibited.
  • the moisture content of the glass fiber is less than 0.08%, making it easy to mix with polyurea, minimizing the release rate with polyurea, and minimizing or preventing agglomeration of glass fiber when it is mixed with polyurea. can do.
  • the moisture content of the glass fiber exceeds the reference value, agglomeration phenomenon occurs when mixing with polyurea, and mixing with polyurea may be uneven.
  • the thickness of the composite elastic layer 23 may be 2 to 10 mm. In more detail, the thickness of the composite elastic layer 23 may be 2 to 9 mm.
  • the thickness of the composite elastic layer 23 may be variously set in response to the performance degradation state of the structure 10 or the characteristics of external factors applied to the structure 10, and the thickness of the composite elastic layer 23 If it is less than 2mm, performance improvement by reinforcing the composite elastomer is meaningless, and if it is larger than 9mm or 10mm with respect to the thickness of the composite elastomer 23, there is a difficulty in construction that requires application several times.
  • the thickness of the composite elastic layer 23 may be set through any one of a flexural reinforcement design formula and a shear reinforcement design formula according to the reinforcing purpose.
  • the flexural reinforcement design formula is, Assuming Is at least 20 And satisfies the following (Equation 1-1), Satisfies the following (Equation 1-2) for, With respect to the following (Equation 1-3), and (Equation 1-4) And preset Repeatedly until you are satisfied with your relationship Correct the expected value of. Accordingly, The thickness of the composite elastic layer 23 for flexural reinforcement can be set through the expected value of.
  • the flexural reinforcement design process using the flexural reinforcement design equation The setting stage and, The assumption stage, the warpage setting stage, The setting stage and, It may include a setting step and a bending setting comparison step.
  • the thickness of the composite elastic layer 23 for flexural reinforcement can be set through the expected value of.
  • And preset The comparison result of, And preset If the difference of is out of the range of the flexural reinforcement error, Can be assumed repeatedly.
  • And preset The comparison result of, And preset If the difference in is out of the flexural reinforcement error range, return to the assumption step, change the expected value for tp, and perform the subsequent steps sequentially again, And preset The difference of can be made to be included in the bending reinforcement error range.
  • the thickness of the composite elastic layer 23 can be set.
  • the shear reinforcement design formula is With respect to the following (Equation 2-1) and (Equation 2-2) are satisfied, Satisfies the following (Equation 2-3) and satisfies Equation (2-4) Repeatedly until it satisfies the equation (2-5) for Correct the expected value of. Accordingly, The thickness of the composite elastic layer 23 for shear reinforcement can be set through the expected value of.
  • the shear reinforcement design process using the shear reinforcement design equation may include a setting step and a shear setting comparison step.
  • the thickness of the composite elastic layer 23 for shear reinforcement can be set through the expected value of.
  • the intermediate layer 22 is applied to the undercoat layer 21.
  • the top coat layer 24 may be applied to the middle coat layer 22.
  • the intermediate layer 22 may be applied to the undercoat layer 21 on the surface of the structure 10 through an intermediate step (S22) to be described later.
  • the top coat layer 24 is applied to the composite elastic layer 23.
  • the top coat layer 24 finishes the surface of the structural reinforcement layer 20 according to an exemplary embodiment of the present invention.
  • the top coat layer 24 may be applied to the composite elastic layer 23 on the surface of the structure 10 through a top coat step (S24) to be described later.
  • the method of constructing a composite elastomer according to an embodiment of the present invention is to apply a structure reinforcing layer 20 according to an embodiment of the present invention to the structure 10 to provide structural performance, seismic performance, and explosion-proof performance of the structure 10. Can improve.
  • the construction method of the composite elastomer according to an embodiment of the present invention to the structure 10, while recovering the performance of the structure 10 degraded due to external factors including external loads or impacts, The ability to resist earthquakes can be improved.
  • the construction method of the composite elastomer according to an embodiment of the present invention improves the penetration resistance of chloride ions, eliminates surface cracking in the structure reinforcing layer 20, and imparts water permeability and moisture permeability. I can.
  • the construction method of the composite elastomer according to an embodiment of the present invention adopts the spraying type in the three-stage reinforcing layer compared to the prior art, even if the performance of the structure 10 is degraded in a large area due to external factors, the construction is simple. It is possible to significantly reduce the construction cost, shorten the construction period and shorten the labor cost, give the rapid setting property (within 5 minutes, at least 1 minute) of the composite elastic layer 23, and the undercoat layer 21 or The adhesion to the intermediate layer 22 and the upper coat 24 are improved, and the shape of the structure 10 can be diversified according to the spray method construction.
  • the method of constructing a composite elastomer according to an embodiment of the present invention is a composite elastomer composition in a structurally insufficient part of a reinforced concrete structure, particularly, a beam, a column, a slab, etc. of a reinforced concrete structure. It is a method of coating, and can be applied to the strength reinforcement and repair work of the structure (10).
  • a two-component elastic material composed of polyurea-isocyanate and amine can be used, and glass fibers in the form of fine powder are mixed and heated at a preset mixing ratio, and high pressure sprayed on the part to be reinforced. It shows the form of doing.
  • the construction method of the composite elastomer according to an embodiment of the present invention has excellent workability and can increase the use performance of the structure 10 with excellent adhesive performance.
  • the method of constructing a composite elastomer according to an embodiment of the present invention is characterized by a polyurea reinforced with glass fibers in the form of fine powder.
  • the composite elastomer in which the glass fiber is mixed with the polyurea improves the shear and flexural strength of the structure 10 with excellent reinforcing performance, suppresses or prevents cracks in the structure, and dissipates energy applied to the structure 10 Can represent.
  • the composite elastomer has excellent crack resistance, has excellent tensile strength and elongation in the structure 10 or the composite elastic layer 23, and may exhibit an effect of improving response performance against cracks.
  • the composite elastomer may exhibit an effect that the adhesion on the contact surface is higher than that of the existing reinforcing material due to excellent adhesion, the cause of defects such as swelling or peeling is reduced, and the adhesion retention performance and the reinforcing performance are maintained for a long time.
  • the composite elastomer can completely rapidly cure the composite elastomer layer within 5 minutes after application at a fast construction speed, and can be easily used in a building.
  • the composite elastomer can be reinforced without restrictions on the shape of the structure due to its excellent workability, and can exhibit an effect of improving workability.
  • the composite elastomer has excellent tensile strength, tear strength, durability, and chemical resistance.
  • the composite elastomer can freely adjust the coating thickness (3mm, 5mm, 9mm, etc.), and the reinforcing effect can be adjusted.
  • the construction method of the composite elastomer according to an embodiment of the present invention may include a background treatment step (S1) and a painting step (S2).
  • the concrete member is at room temperature (18 degrees Celsius to 24 degrees Celsius, more specifically, an average temperature of 20 degrees Celsius) and is cured for at least 28 days at a relative humidity of 80% or less.
  • the adhesion with the undercoat layer 21 is prevented from deteriorating, and defects due to moisture occur in the finished structure reinforcing layer 20 Can be prevented.
  • the surface of the structure 10 is surface-treated using a surface treatment method such as blasting, chipping, or grinding, so that foreign substances such as latency, dust, and oil can be completely removed from the surface of the structure 10.
  • a surface treatment method such as blasting, chipping, or grinding, so that foreign substances such as latency, dust, and oil can be completely removed from the surface of the structure 10.
  • the undercoat film is formed on the surface of the structure 10 having a dense structure where it is difficult to penetrate the urethane undercoat, it causes adhesion failure, so that the surface treatment is sufficiently performed on the surface of the structure 10 so that the penetration of the urethane undercoat is smooth.
  • a post-primer process and a sealing process are added to the surface of the structure 10 with severe gaps, flaws, and cracks, the surface of the structure 10 is adjusted again, and then the painting step (S2) to be described later can be performed.
  • the composite elastomer composition is applied to the surface of the structure 10.
  • the painting step (S2) includes an undercoat step (S21) and a complex elastic step (S23), and may further include at least one of an intermediate step (S22) and a topcoat step (S24).
  • S in the composite elastic step (S23) refers to a dedicated spraying device for the construction of a high-temperature and high-pressure composite elastomer.
  • the dedicated spray device all or part of the "composite elastomer composition construction device" disclosed in Korean Patent Publication No. 10-1942962 may be borrowed.
  • the undercoat layer 21 is formed on the surface of the structure 10.
  • a urethane primer (usually transparent primer), which is a flooring material, is applied to the surface of the structure 10 to be sufficiently absorbed with a brush, roller, spray, or the like.
  • the undercoating step (S21) is uniformly applied so as not to partially form a thick film on the surface of the structure 10.
  • the undercoat step (S21) is usually carried out once or twice so that the urethane undercoat is sufficiently absorbed on the surface of the structure 10.
  • the thickness of the undercoat layer 21 may represent about 50 micrometers. In other words, the thickness of the undercoat layer 21 may represent a ratio of 0.005 to 0.025 with respect to the thickness of the composite elastic layer 23.
  • the urethane undercoat may be additionally applied with a non-gatherite to the part where moisture absorption is severe, care should be taken not to form a thick coating layer on the surface of the structure 10.
  • the undercoating layer 21 ensures that there are no poor surfaces on the surface of the structure, and if it is good, no additional application of the urethane undercoat is required.
  • the undercoat layer 21 is removed by grinding, and moisture is completely removed from the surface of the structure 10 (moisture content is 6-8% or less), and then the undercoat layer 21 is removed by grinding. Allow the layer 21 to be formed.
  • the surface of the structure 10, where it is difficult to penetrate the urethane undercoat, is taken to facilitate penetration into the surface of the structure 10 by excessively diluting the urethane undercoat by 50% or more so that the undercoat layer 21 is not formed thick.
  • a composite elastic layer 23 is formed on the surface of the undercoating layer 21.
  • the composite elastic layer 23 includes a composite elastomer composition.
  • the above-described dedicated spray device may be used.
  • the thickness of the composite elastic layer 23 may be about 2 to 10 mm, more specifically, 2 to 9 mm.
  • the composite elastic layer 23 to be formed it should be packaged with suitable protective materials (masking or vinyl, etc.) in advance so that there is no contamination during construction.
  • suitable protective materials masking or vinyl, etc.
  • the contaminants of the lower layer 21 or the middle layer 22 are removed. It can prevent wear.
  • the thickness of the composite elastic layer 23 and the required consumption of the composite elastomer are accurately calculated, and poly Mix enough so that urea and glass fiber are uniformly mixed
  • the dedicated spraying device accurately mixes and sprays the composite elastomer, which is the main material, and the hardener at a preset mixing ratio (1:1 ratio).
  • the dedicated spray device is a spray device exclusively for composite elastomers in which glass fibers are mixed with polyurea, and can mix polyurea and glass fibers by a collision mixing method.
  • the nozzle diameter is 0.024 to 0.048 inch
  • the nozzle diameter is 0.020 to 0.086 inch
  • the spray pressure is 2000 to 3000 psi.
  • the spraying angle represents 30 to 60 degrees
  • the spray distance is about 60 cm and the error range is within 10 cm
  • the temperature of the main body and the hardener in the packaging are 10 to 35 degrees Celsius, respectively
  • PTA for the heating temperature for spraying And PTB may represent 60 to 75 degrees Celsius, respectively.
  • the base material and hardener in the packaging should be prevented from falling below 10 degrees Celsius. Accordingly, the main body and the curing agent in the packaging container can be heated using a drum heater or maintained in a pre-warmed state, thereby preventing the temperature of the main body and the curing agent in the packaging container from lowering due to the atmospheric environment.
  • the PTA temperature can be set 5 to 10 degrees Celsius higher than the PTB temperature to prevent the device from stopping.
  • the PTB temperature may be set to 60 to 65 degrees Celsius.
  • the site of occurrence is removed or grinding is performed, and then it is covered with a putty or a sealing agent, and then applied.
  • the contaminated part may be wiped off, treated with chemicals, and then repainted.
  • a thickening layer is formed on the surface of the undercoat layer 21.
  • the intermediate layer 22 may be formed of various known waterproofing agents, and in an embodiment of the present invention, polyurea applied to the composite elastomer may be used.
  • the thickness of the intermediate layer 22 may represent about 500 micrometers.
  • the thickness of the intermediate layer 22 may represent a ratio of 0.05 to 0.25 with respect to the thickness of the composite elastic layer 23.
  • the intermediate layer 22 When the intermediate layer 22 is formed, if any one of the main material and the hardener is excessively applied due to a spray gun or equipment trouble, the contaminated part may be wiped off, treated with chemicals, and then repainted.
  • a top coat layer 24 is formed on the surface of the complex elastic layer 23.
  • the top coat layer 24 may use various types of known finishing materials or fireproofing agents.
  • the top coat step (S24) is uniformly applied so that the surface of the composite elastic layer 23 is not partially thickened. Accordingly, the top coat step (S24) may be performed once or twice to sufficiently wrap the surface of the composite elastic layer 23.
  • the thickness of the top coat layer 24 may represent about 50 micrometers. In other words, the thickness of the top coat layer 24 may represent a ratio of 0.005 to 0.025 with respect to the thickness of the composite elastic layer 23.
  • the top coat layer 24 may be applied using a brush, roller, spray, etc. with a "polyurea top coat" of a desired color after line marking.
  • top coat layer 24 since color separation and concealment defects may occur when the top coat is excessively diluted, it is advantageous to adhere to the recommended dilution amount with a designated diluent.
  • the material is sufficiently stirred in the spraying device before application.
  • it should be sprayed when the temperature of the product reaches 65 to 75 degrees Celsius.
  • the required amount in the painting step (S2) may vary depending on the surface condition of the structure 10, the application method, and the application conditions, the required amount is adjusted in consideration of the surrounding conditions.
  • a composite elastomer is formed in which glass fibers, which are finely powdered fibers, are mixed with polyurea and applied to the surface of the structure 10. , It is possible to improve the structural performance, seismic performance, and explosion-proof performance of the structure 10 degraded due to external factors including external loads or impacts.
  • the present invention uses a composite elastomer in which glass fiber is mixed with polyurea, so that the thickness of the coating depends on the required strength. Design and control can be facilitated, and strength and ductility in the reinforcing layer 20 can be improved.
  • the application value of the polymer can be increased.
  • by being applied to the surface of structures (especially, exterior decorative finishes such as masonry, tiles, curtain walls, etc.) damaged by earthquakes it is possible to sufficiently prevent dropping, and propose an economical and simple construction technique.
  • the application of composite elastomers can be increased.
  • the flexural strength, shear strength, ductility, and explosion-proof performance of the structure which is a brittle material. It improves the structure, is easy to construct, and is effective in shortening the construction period.
  • the structure (10) The elongation rate of the structure 10 or the composite elastic layer 23 at break may be 350 to 380%, and the adhesive performance of the composite elastic layer 23 in the structure 10 may be 2.2 to 2.5 N/mm 2 or more.
  • the thickness of the composite elastic layer 23 by applying any one of the flexural reinforcement design formula and the shear reinforcement design formula according to the reinforcing purpose, the characteristics of the structure 10 to which the structural reinforcement layer 20 is applied. In response, the thickness of the composite elastic layer 23 can be easily adjusted, and misuse of materials can be prevented in forming the structure reinforcing layer 20.
  • the shear reinforcement of the structure 10 is stabilized, and the shear reinforcement thickness can be conveniently set in response to the structure 10 to be applied.
  • durability and crack resistance of the structure 10 may be improved through the intermediate layer 22, and adhesion between the undercoat layer 21 and the composite elastic layer 23 may be improved.
  • the composite elastic layer 23 contributes to the improvement of the performance of the structure 10, and the adhesion between the undercoat layer 21 and the upper coat layer 24, and the adhesion between the intermediate layer 22 and the upper coat layer 24 Can improve.
  • weather resistance, abrasion resistance, chemical resistance, and fire resistance of the structure 10 may be improved.
  • the present invention forms a composite elastomer obtained by mixing polyurea with glass fiber, which is a fine powder, and applies it to the surface of the structure. It can be applied to composite elastomer compositions that can improve performance and explosion-proof performance, structural reinforcing layers, and construction methods of composite elastomers.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

La présente invention concerne une composition d'élastomère composite qui forme un élastomère composite dans laquelle une fibre de verre, qui est une poudre fine de fibre, est mélangée à une polyurée, l'élastomère composite étant appliqué sur la surface d'une structure, et peut ainsi améliorer les performances structurales, les performances sismiques et les performances antidéflagrantes de la structure, qui se dégrade en raison de facteurs externes comprenant une charge externe, un choc et analogues ; une couche de renforcement de structure ; et un procédé de construction à l'aide de la composition d'élastomère composite. À cette fin, la composition d'élastomère composite comprend une polyurée liquide et une fibre de verre mélangée à la polyurée, la fibre de verre étant mélangée en une quantité de 6 à 15 % en poids pour 100 % en poids de la polyurée, ou étant mélangée en une quantité de 8,5 à 25,5 % en volume pour 100 % en volume de la polyurée.
PCT/KR2019/015915 2019-11-18 2019-11-20 Composition d'elastomère composite, couche de renforcement structurale, et procédé de construction à l'aide d'une composition d'elastomère composite WO2021100899A1 (fr)

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KR10-2019-0147628 2019-11-18
KR1020190147628A KR102279044B1 (ko) 2019-11-18 2019-11-18 복합탄성중합체 조성물과 구조보강용 층 그리고 복합탄성중합체의 시공방법

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KR102470658B1 (ko) 2022-03-16 2022-11-25 (주) 펜테크 탄성복합방수구조 및 이를 시공하기 위한 탄성복합방수공법
KR102596351B1 (ko) 2023-09-01 2023-10-31 (주) 펜테크 융복합형 차열방수페인트 조성물

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