KR101644957B1

KR101644957B1 - Hybrid FRP Panel Composition Comprising Mortar and Concrete Structure Maintenance Using Thereof

Info

Publication number: KR101644957B1
Application number: KR1020160014663A
Authority: KR
Inventors: 최선호; 박태영; 조영원
Original assignee: (주)고려씨엔씨; 주노이씨엠 주식회사
Priority date: 2016-02-05
Filing date: 2016-02-05
Publication date: 2016-08-03

Abstract

The present invention relates to a mortar composition comprising, based on 100 parts by weight of mortar, 50 to 80 parts by weight of a conjugate fiber; 30 to 90 parts by weight of a phenolic resin; 1 to 10 parts by weight of a lightweight material; 5 to 30 parts by weight of nano-ceramic particles; 10 to 30 parts by weight of an anti-deformation agent; 0.1 to 10 parts by weight of a re-forming type polymer powder; 3 to 15 parts by weight of a flame retardant; 3 to 6 parts by weight of a release agent; 2 to 20 parts by weight of a binder; 2 to 20 parts by weight of a curing agent; 5 to 20 parts by weight of a modified silane silicate; And 2 to 10 parts by weight of a stabilizer, and a method of using the FRP panel composition.
The FRP panel composition according to the present invention has an effect of improving fire resistance, water resistance, strength and the like while using mortar, phenolic resin and composite materials such as basalt fiber and glass fiber composite material and having excellent repair and / or reinforcement properties .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid FRP panel composition including a mortar and a concrete structure using the same,

The present invention relates to a hybrid FRP panel composition comprising a mortar and a method for repairing and reinforcing concrete structures using the same. More particularly, the present invention relates to a mortar and / or phenol resin used for repairing and reinforcing concrete structures, The present invention also relates to a hybrid FRP panel composition comprising mortar having excellent flame retardancy, and to a method of repairing and reinforcing concrete structures using the hybrid FRP panel composition.

Generally, concrete or reinforced concrete structures (such as bridges, retaining walls, tunnels, general apartments, underground parking lots of buildings, houses or building walls, etc.) Cracks, corrosion and peeling due to physical deformation, exposure of the reinforcing steel parts due to this, whitening and sagging phenomenon are occurring. Particularly, the cracks and the like proceeding in this way may cause the worst such as collapse, It is well known that reinforcement works by

The reinforcement of concrete structures can be roughly classified into restoring the strength reduction and increasing the structural strength to suit the purpose of use. In order to repair or reinforce the cracked structure (structure) , It is necessary to determine a reinforcement method suitable for sufficiently completing the cause.

On the other hand, reinforcement of concrete structures needs to be dealt with precisely in terms of rebuilding the structure to suit the purpose of use, and the behavior after reinforcement must be fully considered.

When reinforcing a structure, reinforcement method, reinforcement time, and reinforcement material are selected so that the pre-planned reinforcement purpose can be achieved in consideration of the cause of crack, load, range and scale of required strength reinforcement, And the section and members must be designed. In addition, the stability should be considered in consideration of changes in structure, additional long-term load, and construction load at the time of reinforcement.

Particularly, peeling of the structure surface or occurrence of initial defects or cracks facilitates the movement of deterioration factors and promotes progress of deterioration. Therefore, in order to secure the stability and performance of the reinforced concrete structure, repair / reinforcement is carried out at the beginning of deterioration, It is necessary to suppress the progress and improve the durability performance.

Therefore, in order to restore the section to its original performance and shape after removing the concrete part including deterioration factors such as deterioration factor of deterioration such as deterioration of concrete, corrosion of steel and other factors, It is general to carry out repair by construction.

Conventional repair reinforcements for repairing a section are mainly made of cement mortar or polymer cement mortar. These conventional repair reinforcements are used to increase the strength or increase the strength Since most of the products are focused only on improving the adhesion performance during construction, there is a problem that maintenance or reinforcement works frequently because the surface is easily damaged after a short time after construction.

For example, in Korean Patent Publication No. 2000-0001355, a technique of repairing and reinforcing a concrete structure by using a steel plate (or a fiber reinforced plate) is attached to a section subjected to a tensile force by an anchor or the like.

However, in the case of attaching the steel plate to the anchor, the weight of the steel plate is too heavy to handle, and the steel plate is corroded with time, and the bearing capacity is weakened.

As a method for solving the problems of the conventional repair / reinforcement method, a Korean Registered Utility Model No. 0345919 has installed a horizontal groove portion having a certain depth and length in a cross section of a concrete structure subjected to tensile force and a vertical groove portion formed on both sides thereof , A fiber material rope as a repair / reinforcement material is installed in the inside of the rope, and the outer surface of the rope is finished with a high-strength mortar or epoxy to a predetermined thickness to finish the same as the outer surface of the concrete, and then a plurality of injection pipes are installed in the vertical and horizontal grooves A method of repairing / reinforcing a cross section of a concrete structure is proposed by injecting epoxy into the injection pipe to completely fill the concrete, and to tense the fiber material rope as the epoxy solidifies and consequently to tense the cross section of the concrete structure.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above problems, and it is an object of the present invention to provide a flame retardant resin composition which is improved in fire resistance, water resistance and strength by using a mortar, a phenol resin and a composite material (hybrid), for example, Provides an excellent FRP panel composition.

The present invention
On the basis of 100 parts by weight of mortar,
50 to 80 parts by weight of composite fibers;
30 to 90 parts by weight of a phenolic resin;
1 to 10 parts by weight of a lightweight material;
5 to 30 parts by weight of nano-ceramic particles;
10 to 30 parts by weight of an anti-deformation agent;
0.1 to 10 parts by weight of a re-forming type polymer powder;
3 to 15 parts by weight of a flame retardant;
3 to 6 parts by weight of a release agent;
2 to 20 parts by weight of a binder;
2 to 20 parts by weight of a curing agent;
5 to 20 parts by weight of a modified silane silicate; And
2 to 10 parts by weight of a stabilizer is added to the FRP panel composition,
Further comprising 5 to 20 parts by weight of limestone powder based on 100 parts by weight of the mortar,
Further comprising 5 to 10 parts by weight of expanded graphite based on 100 parts by weight of the mortar,
Further comprising 0.1 to 5 parts by weight of the catalyst based on 100 parts by weight of the mortar,
Further comprising 1 to 5 parts by weight of sodium metasilicate based on 100 parts by weight of the mortar,
Further comprising 5 to 10 parts by weight of sodium alginate based on 100 parts by weight of the mortar,
Further comprising 10 to 30 parts by weight of foamed material based on 100 parts by weight of the mortar,
Further comprising 1 to 10 parts by weight of tetraethylenepentamine based on 100 parts by weight of the mortar,
Further comprising 1 to 10 parts by weight of a crosslinked polyacrylate salt based on 100 parts by weight of the mortar,

And 1 to 3 parts by weight of calcium oxide based on 100 parts by weight of the mortar.

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In addition,
A surface treatment step of surface-treating the surface of the concrete structure to be repaired or reinforced;
A primer applying step of applying an epoxy primer after the surface treatment step is finished;
After completion of the primer coating step, 50 to 80 parts by weight of the composite fiber, 30 to 90 parts by weight of the phenol resin, 1 to 10 parts by weight of the lightweight material, 5 to 30 parts by weight of the nanoceramic particles, 10 to 30 parts by weight of a re-oiling type polymer powder, 3 to 15 parts by weight of a flame retardant, 3 to 6 parts by weight of a release agent, 2 to 20 parts by weight of a binder, 2 to 20 parts by weight of a curing agent, By weight based on 100 parts by weight of the mortar and 5 to 20 parts by weight of expanded graphite by 5 to 10 parts by weight based on 100 parts by weight of the mortar in the FRP panel composition comprising 2 to 10 parts by weight of the stabilizer, Further comprising 0.1 to 5 parts by weight of the catalyst based on 100 parts by weight of the mortar and further comprising 1 to 5 parts by weight of sodium metasilicate based on 100 parts by weight of the mortar, Further comprising 5 to 10 parts by weight of sodium based on 100 parts by weight of the mortar, wherein the foamed material further comprises 10 to 30 parts by weight based on 100 parts by weight of the mortar, wherein the tetraethylenepentamine is used in an amount of 1 to 10 parts by weight And further comprising 1 to 10 parts by weight of crosslinked polyacrylate salt based on 100 parts by weight of the mortar and further comprising 1 to 3 parts by weight of calcium oxide based on 100 parts by weight of the mortar, ; And

And an adhesive injection step of injecting an adhesive between the FRP panel and the object surface after the joining step is completed.

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INDUSTRIAL APPLICABILITY The FRP panel composition according to the present invention is improved in fire resistance, water resistance and strength by using mortar, phenolic resin and composite material such as basalt fiber and glass fiber composite material, and is excellent in flame retardancy and excellent in repairability and / It is effective.

Hereinafter, the present invention will be described in detail.

In one aspect, the present invention provides a method of making a composite fiber comprising 50 to 80 parts by weight of a composite fiber, 30 to 90 parts by weight of a phenolic resin; 1 to 10 parts by weight of a lightweight material; 5 to 30 parts by weight of nano-ceramic particles; 10 to 30 parts by weight of an anti-deformation agent; 0.1 to 10 parts by weight of a re-forming type polymer powder; 3 to 15 parts by weight of a flame retardant; 3 to 6 parts by weight of a release agent; 2 to 20 parts by weight of a binder; 2 to 20 parts by weight of a curing agent; 5 to 20 parts by weight of a modified silane silicate; And 2 to 10 parts by weight of a stabilizer.

In another aspect, the present invention relates to a surface treatment method for surface-treating a surface to be repaired or reinforced of a concrete structure; A primer applying step of applying an epoxy primer after the surface treatment step is finished; After completion of the primer coating step, 50 to 80 parts by weight of the composite fiber, 30 to 90 parts by weight of the phenol resin, 1 to 10 parts by weight of the lightweight material, 5 to 30 parts by weight of the nanoceramic particles, 10 to 30 parts by weight of a re-oiling type polymer powder, 3 to 15 parts by weight of a flame retardant, 3 to 6 parts by weight of a release agent, 2 to 20 parts by weight of a binder, 2 to 20 parts by weight of a curing agent, And 2 to 10 parts by weight of a stabilizer; And an adhesive injection step of injecting an adhesive between the FRP panel and the object surface after the joining step is completed.

The FRP panel composition according to the present invention, specifically, a hybrid FRP panel composition comprising mortar is not particularly limited as long as it can be applied to a concrete structure requiring repair and / or reinforcement to provide fire resistance, waterproof property and reinforcement property.

The mortar according to the present invention may be any mortar such as cement, sand or the like, which is conventional in the art. However, depending on the type of the fixing agent to be added, the mortar may be a lime mortar, an asphalt mortar, a resin mortar, Pearlite mortar, or a mixture thereof.

At this time, the cement and sand constituting the mortar are those conventionally used in the art.

The mixing ratio of the cement and the sand may be changed according to the user's preference, but it is recommended that the ratio of cement and sand is 3: 7 to 7: 3.

The content of the remaining components other than the mortar of the FRP panel composition according to the present invention is based on 100 parts by weight of the mortar.

The composite fiber according to the present invention is included in the FRP panel composition to provide rigidity and at the same time to have a certain shape of the FRP panel.

As a preferable composite fiber, a mixture of at least two of basalt fiber, glass fiber, baseste fiber, natural fiber, carbon fiber, synthetic fiber, vinyl fiber or aramid fiber is preferably used. And preferably 50 to 80 parts by weight.

As a specific aspect, the composite fiber according to the present invention is made of a composite material in which the basalt fiber and the glass fiber are mixed at a weight ratio of 3: 7 to 7: 3 by weight, more preferably, the basalt fiber and the glass fiber are mixed at a weight ratio of about 5: 5 .

In another specific embodiment, the composite fiber according to the present invention may be present in any form as long as it is mixed with the FRP panel composition, but it is preferable that each composition constituting the panel composition is impregnated so that the FRP panel has a predetermined form It is good to do.

At this time, the fibers may be formed in the form of woven fibers woven in a lattice manner.

The weft yarns are woven in such a manner that the fibers in the warp direction and the warp direction are vertically engaged to minimize the occurrence of later sagging and unraveling.

The thickness of the yarn used for the woven fiber is preferably at least 10 탆 or more, and the thickness of the knitting yarn is maintained at a constant value of about 5 mm. The thickness of the fabric after the weaving is 0.345 to 0.38 mm, To form fibers.

As another specific embodiment, the fibers according to the invention, in particular the conjugated fibers, can be used in the form of a fiber mesh net woven lattice to have a diameter of from 10 to 25 mm.

In another specific embodiment, the FRP panel composition according to the present invention may further comprise 5 to 20 parts by weight of polyaramid fiber reinforcement based on 100 parts by weight of mortar to prevent cracking and increase toughness of the FRP panel composition.

Examples of the polyamide fiber reinforcing material include polyamide (nylon 6), polyaramid (nylon 66), aramid and the like, preferably aramid coated with a dispersant.

The polyamide is a relatively inactive material and is known to be highly resistant to various organic and inorganic materials including strong bases.

Particularly, the aramid coated with the dispersant has an advantage of being excellent in tensile strength, abrasion resistance and durability, and when incorporated into the FRP panel composition, the aramid inherent characteristics as described above can be imparted to the FRP panel composition .

In addition, the aramid can improve the insulating performance due to its low thermal conductivity.

These aramids are filament type which is drawn in the form of yarn and used to make the fabric, pulp type which is formed in the form of powder to be used for making the product, freely adjusting the thickness of the yarn, There is a staple shape obtained by grinding. In the present invention, it can be applied to any one of the double selected shapes.

On the other hand, the aramid has a single shape, and its length is 1 to 100 mm, preferably 3 to 40 mm, and its diameter or thickness is 1 to 50 탆, preferably 10 to 40 탆. The length and diameter or thickness of the aramid can be adjusted to the optimum range according to the quality, durability, tensile strength, flexural strength and toughness of the desired panel, and it is preferable to use the single length and single diameter to maintain a single shape.

In the aramid, a single shape means that fibers having different lengths or diameters are not mixed, and it is preferable to use a fiber reinforcing material having a single shape of a single length and a single diameter in terms of dispersibility within the panel.

The aramid has an intensity of 8.5 g / d or more, preferably 9.5 g / d or more as measured by a gauge length of 5 mm, an elongation of 60 to 135% as measured by a gauge length of 5 mm, Can be from 75 to 115%.

In the present invention, when the strength and elongation of the aramid are out of the above range, the effect of improving the crack resistance of the FRP panel may be weakened.

The aramid may have a relative viscosity (RV) of 2.9 or more, and preferably 3.2 or more. If the relative viscosity (RV) of the aramid is lower than the above range, the strength and abrasion resistance of the fiber itself may deteriorate.

In the present invention, the aramid may have a fineness of 1 to 10 denier, preferably 1.5 to 5 denier.

When the fineness is less than 1 denier, the surface area of the fiber increases and the contact area increases. However, the strength of the fiber itself may be lowered and the dispersibility of the fibers in the panel may be lowered. On the other hand, if the fineness is more than 10 denier, the number of fibers per unit area of the panel may be reduced, which may result in a relatively weak portion of the panel.

Also, in the present invention, the aramid may be coated with a coating liquid containing an ester-based lubricant and a nonionic surfactant on the surface of the fiber, and through this coating, the dispersibility in the panel and the bonding force between the composition and each composition can be greatly improved.

Considering the effect of improving the dispersibility and the bonding strength of the aramid, the coating amount of the coating solution is preferably 0.5 to 3% by weight based on the total weight of the aramid, but is not limited thereto.

The phenolic resin according to the present invention has heat resistance, flame retardancy, nonflammability and low flammability, and is excellent in mechanical properties, so that it is safe for fire when used as a FRP base material.

Such a phenol resin is not particularly limited as long as it is a conventionally used phenol resin in the art, but it is preferable to use a phenol resin condensed and synthesized under formalin condition with phenol, more preferably a phenol resin having a specific gravity (25 캜) of 1.2 The viscosity is from 8,000 to 10,000 占 퐏, the gelling time is from 100 to 120 (150 占 폚 / sec), the nonvolatility is from 60 to 75%, and the pH is from 7.5 to 8.3.

The amount of the phenolic resin to be used is not particularly limited, but it is recommended to use 30 to 90 parts by weight based on 100 parts by weight of the mortar.

The light weight material according to the present invention is used to reduce the stress of the worker due to the self weight of the product when the weight of the light weight material is increased and it can cause difficulties when the product is transported in the work place. Any material may be used, but it is preferable to use an acryl-based organic light-weight material, and more preferably, a small amount of the material can exhibit its function, It is recommended to use an acrylic-based lightweight material having a total thickness of 10 mm or less.

At this time, since the acrylic organic lightweight material may be deteriorated in flame retardancy due to organic matter, it is preferable to minimize the amount of the acrylic organic lightweight material used. In order to increase the flame retardancy, if necessary, an inorganic lightweight material such as shirasu balun, perlite, have.

The amount of the lightweight material to be used is preferably 1 to 10 parts by weight based on 100 parts by weight of the mortar.

The nanoceramic particles according to the present invention float on the surface of the FRP panel during curing of the FRP panel composition to form a dense and hard surface, thereby preventing permeation of water vapor and other gases and liquids, , Weather resistance, impact resistance and chemical resistance are improved.

The amount of the nanoceramic particles used is preferably 5 to 30 parts by weight based on 100 parts by weight of the mortar.

Preferred nanoceramic particles include silicon carbide, alumina, silica, zirconia-silica, ZnO, TiO ₂ and / or CaCO ₃ .

Preferably, the average particle size of the ceramic particles is in the range of 300 to 500 nm, the average particle size of the alumina is 500 to 1000 nm, the average particle size of the silica is 700 to 1500 nm, the zirconia- It is preferable that the average particle size of silica is 500 to 1000 nm, the average particle size of ZnO is 500 to 1000 nm, the average particle size of TiO ₂ is 100 to 300 nm, and the average particle size of CaCO ₃ is 500 to 1000 nm.

Among them, silicon carbide does not exist as natural minerals, so it is synthesized artificially, has excellent chemical stability and corrosion resistance at high temperature, and has high hardness.

The anti-strain agent according to the present invention is intended to reduce the plastic deformation of the FRP panel composition.

It is recommended that the preferred antidegradant contains polyethylene, ethylene vinyl acetate, polybutene, impact polystyrene, polypropylene or a mixture thereof, and the amount of the antioxidant used is preferably 10 to 30 parts by weight based on 100 parts by weight of the mortar.

The redispersible polymer powder according to the present invention improves the warpage and adhesion strength by forming a film inside the FRP panel composition and improves the water retention, thereby improving durability such as neutralization, chloride ion penetration, freezing and thawing have.

The preferred re-firing polymer powder is composed of at least one selected from ethylene vinyl acetate (EVA) or vinyl acetate / vinyl valerate (Va / VeoVa), wherein the apparent specific gravity is 475? G / Mu m and exhibits a particle size distribution of 0.3 to 9 mu m when redispersed in water, and the amount of use is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the mortar.

The flame retardant according to the present invention is for imparting flame retardancy to the FRP panel composition.

Preferred flame retardants are metal hydroxides, phosphorus flame retardants, ammonium pyrophosphoric acid, or mixtures thereof.

The metal hydroxide to be used in the flame retardant is not particularly limited as long as it is aluminum hydroxide, magnesium hydroxide, etc., but is preferably surface-treated with magnesium hydroxide, specifically stearic acid, vinylsilane, fatty acid, phosphoric acid, It is advisable to use magnesium hydroxide coated and surface-treated.

At this time, the aluminum hydroxide used as the flame retardant may be dense in addition to the flame retardant effect, and the dimensional stability and heat resistance can be increased, and therefore, its use is recommended.

As a specific embodiment, the flame retardant according to the present invention can be used together with flame retardant auxiliaries such as ammonium pyrophosphoric acid, specifically, liquid ammonium pyrophosphoric acid, to satisfy the flame retardancy required by the FRP panel composition even with a small amount of flame retardant.

When the flame retardant is used together with the phosphorus-based flame retardant and / or the surface-treated magnesium hydroxide, the flame retardant effect is increased as compared with the case where only one flame retardant is used alone.

However, the liquid ammonium ammonium pyrophosphate does not have its own flame retarding effect.

In particular, the phosphorus-based flame retardant used in the flame retardant agent according to the present invention is excellent in the flame retardant effect, but when the final product is applied to the FRP panel composition, whitening occurs on the surface of the product, In order to overcome this problem, it is preferable to use a small amount of phosphorus flame retardant.

Accordingly, in the present invention, the ammonium pyrophosphoric acid can be used in the same manner as the flame-retardant auxiliary agent in order to ensure the desired flame retardancy despite the use of a small amount of the phosphorus flame retardant. It is recommended to use it as a liquid rather than a powder to prevent bleaching phenomenon.

Particularly, the liquid ammonium polyphosphoric acid may contain a hydrophilic type inhibitor to prevent the whitening phenomenon of a product manufactured using the FRP panel composition.

The amount of the preferred flame retardant to be used may be varied according to the user's choice, but it is preferably 3 to 15 parts by weight based on 100 parts by weight of the mortar.

The release agent according to the present invention is intended to improve the fish quality and quality by providing a mold release effect between the FRP panel composition and the mold or mold when the FRP panel is manufactured using the FRP panel composition. , It is preferable to use zinc stearate. The amount of the zinc stearate used is preferably 3 to 6 parts by weight based on 100 parts by weight of the mortar.

The binder according to the present invention enables each component constituting the FRP panel composition to be bonded more densely, and any binder such as an organic / inorganic binder having such a purpose may be used, It is recommended that inorganic binders be used rather than organic binders in order to improve flame retardancy.

As a preferable inorganic binder, it is preferable to use clay, clay, sodium silicate, alumina silicate, calcium silicate, or a mixture of at least one selected from them, and the amount of the inorganic binder is preferably 2 to 20 parts by weight based on 100 parts by weight of the mortar.

The curing agent according to the present invention is for curing the FRP panel composition and any curing agent conventionally used in the art may be used for this purpose.

Preferable curing agents include para-toluene sulfonic acid (PTSA), phenolsulfonic acid, tert-butylperoxy benzoate, TBPB, phthalic acid anhydride, aromatic polyamines, bis- (4-t-butylcyclohexane) peroxydicarbonate, polymercaptan, or a mixture thereof is preferably used, and the amount thereof is preferably 2 to 20 parts by weight based on 100 parts by weight of the mortar.

The modified silane silicate according to the present invention is intended to improve the crack resistance, water resistance, stain resistance, abrasion resistance and / or adhesion resistance of the FRP panel composition.

The modified silane silicate can be prepared by mixing silicate and silane.

The silicate may be any silicate commonly used in the art, but more preferably an alkali silicate, particularly preferably a lithium silicate, a pure potassium silicate, a pre-treated potassium silicate, a synthetic silicate (lithium, Potassium), colloidal silica, or a mixture of at least one selected from these. However, the present invention is not limited thereto.

The preferred silane may be any silane commonly used in the art, but it may be any one selected from aminosilane, vinylsilane, epoxysilane, methacrylsilane, sulfur, alkylsilane, phenylsilane, vinyltrichloro Silane, normal hexyltriethoxysilane, aminoethylaminopropylsilane, phenyltrimethoxysilane, vinylbenzylaminoethylaminopropyltrimethoxysilane, methyldimethoxysilane, methacryloxypropylmethoxysilane, aminoethylaminopropyl Trimethoxysilane, vinyltrimethoxysilane, tetraethoxysilane, 3-glycidoxypropyltrimethoxysilane, aminopropyltrimethoxysilane, or a mixture of at least one selected from these. However, the present invention is not limited thereto.

On the other hand, a method for producing the modified silane silicate by mixing the silicate and the silane is not particularly limited, but it is recommended that 0.1 to 2 parts by weight of silane be added to the silicate in the temperature range of 95 to 110 캜 based on 100 parts by weight of the silicate Diluted and stirred at a speed of 200 to 400 rpm for 1 to 2 hours.

The amount of the modified silane silicate used is preferably 5 to 20 parts by weight based on 100 parts by weight of the mortar.

The stabilizer according to the present invention is intended to protect the FRP panel composition from ultraviolet rays to provide stability. Any conventional stabilizer in the art having such a purpose may be used, and preferably, an acrylic polyol resin, a non-yellow poly Urea resin, polyisocyanate or a mixture thereof is preferably used, and it is recommended that the amount thereof is 2 to 10 parts by weight based on 100 parts by weight of the mortar.

In a specific embodiment, the FRP panel composition according to the present invention may further comprise limestone powder in an amount of 5 to 20 parts by weight based on 100 parts by weight of the mortar.

The limestone powder acts to block the oxygen source which is one of the three major elements of the fire due to the generation of carbon dioxide by decomposition of the limestone powder upon contact with the flame.

The limestone powder may be a conventional limestone powder. Particularly, the use of limestone powder having a powder range of 3,000 to 5,000 cm 2 / g is preferable because the pyrolysis of limestone proceeds easily.

In another specific embodiment, the FRP panel composition according to the present invention may further comprise 5 to 10 parts by weight of expanded graphite based on 100 parts by weight of the mortar. When the content is less than 5 parts by weight based on 100 parts by weight of the mortar, If the amount is more than 10 parts by weight, the amount of the powder becomes large and the mixture can gel.

The expanded graphite acts to strengthen the adhesion and flame retardancy in the production of the FRP panel by the formation of the porous carbonized layer.

The expanded graphite has a density of 1.5 to 2.3 g / cm 3, a particle diameter of 30 to 1,000 탆, and an expansion coefficient of 20 to 250 times that of the expanded graphite, so that the effect of blocking the flame is maximized.

In another specific embodiment, the FRP panel composition according to the present invention may further include 10 to 30 parts by weight of talc based on 100 parts by weight of the mortar. If the content is less than 10 parts by weight based on 100 parts by weight of the mortar, And if the content exceeds 30 parts by weight, it causes a thickening, which is not preferable.

The talc is a hydrated magnesium silicate mineral having excellent whiteness and is also called talc. Since talc is an inorganic mineral, the melting point is strong at 1400 ° C. to increase fire resistance, water resistance, and tensile strength and bending strength.

In another specific embodiment, the FRP panel composition of the present invention may further comprise 0.1 to 5 parts by weight of the catalyst based on 100 parts by weight of the mortar.

The catalyst is used for facilitating curing and for easily bonding a phenol resin as an organic material with glass fiber as an inorganic material and other materials. Any catalyst may be used as long as it is a conventional catalyst in the art having such a purpose, Aminopropane triepoxysilane is preferably used.

Here, the aminopropane tri-epoxysilane is used as a coupling agent in glass fibers and has an amino group capable of bonding with a phenol resin.

In yet another specific embodiment, there FRP panel composition in the present invention may further include a 100 parts by weight based on from 1 to 5 parts by weight of meta-sodium silicate mortar (Na ₂ SiO ₃₎ to the compression strength and the bending strength improves, mortar 100 wt. If the content is less than 1 part by weight, the fluidity is lowered and irregular bubbles are formed. If the content exceeds 5 parts by weight, the fluidity is drastically lowered and it is difficult to secure the pot life.

The above-mentioned sodium meta sulphate may be a hydrate, but anhydrides obtained by heating and melting a mixture of quartz and sodium carbonate at 1000 캜 to solidify them may also be used.

In another specific embodiment, the FRP panel composition according to the present invention may further comprise 1 to 10 parts by weight of the water absorbent polymer based on 100 parts by weight of the mortar.

The water absorbent polymer absorbs water to expand the water absorbent polymer to function as a ball bearing, thereby improving the workability of the FRP panel composition, thereby reducing the unit water content of the panel composition and increasing the strength.

Preferred water absorbent polymers are at least one or more mixtures selected from polyacrylate salts and derivatives thereof, polyethylene oxide derivatives and water absorbent polyurethanes.

In another specific embodiment, the FRP panel composition according to the present invention may further contain sodium alginate in an amount of 5 to 10 parts by weight based on 100 parts by weight of the mortar for the purpose of improving the viscosity and enhancing the adhesion, If the content is less than 10 parts by weight, the hydrophobicity is deteriorated. If the content is more than 10 parts by weight, the viscosity is excessively increased.

The sodium alginate is one of the polysaccharides represented by (C6H8O6) n and has a carboxyl group. The sodium alginate itself has a viscosity, and when incorporated into the FRP panel composition, viscosity increase and adhesion .

In another specific embodiment, the FRP panel composition according to the present invention may further comprise 10 to 30 parts by weight of a foamed material based on 100 parts by weight of the mortar to reduce the weight of the FRP panel to be manufactured.

The foamed material may be any conventional foamed material in the art, but it is recommended to use foamed styrene powder, foamed pearlite, or a mixture thereof.

The foamed pearlite is preferably one obtained by pulverizing and heating pearlite ore to form pores.

In another specific embodiment, the FRP panel composition according to the present invention may further contain 1 to 10 parts by weight of tetraethylenepentamine (TEPA) based on 100 parts by weight of the mortar for controlling viscosity and strength, If the amount of pentamine is less than 1 part by weight based on 100 parts by weight of the mortar, the effect is insignificant. If the amount is more than 10 parts by weight, the amount thereof may be excessive and adversely affect the physical properties of the FRP panel composition.

In another specific embodiment, the FRP panel composition according to the present invention may further comprise 1 to 10 parts by weight of a crosslinked polyacrylate salt based on 100 parts by weight of the mortar to prevent moisture penetration and improve durability.

The crosslinked polyacrylate salt fills the voids inside the FRP panel composition to prevent penetration of moisture, thereby enhancing the durability of the interior. More specifically, the crosslinked polyacrylate salt is an acrylic resin Refers to a substance in which a polymer of a salt is crosslinked and is composed of a copolymer of acrylic acid and sodium acrylate containing acrylic acid dl as a crosslinking agent and has the following formula (C ₃ H ₄ O ₂ .C ₃ H ₃ O ₂ Na) x.

The crosslinked polyacrylate salt having the above structure can be obtained by crosslinking a polyacrylate salt in the presence of a hydrophilic group in a three-dimensional network structure or a single-chain structure through cross-linking between polymer chains, Thereby filling the internal voids to prevent the penetration of moisture and improving the durability.

In another specific embodiment, the FRP panel composition according to the present invention may further contain 1 to 3 parts by weight of calcium oxide (CaO) as a hygroscopic agent based on 100 parts by weight of the mortar. When the content is less than 1 part by weight based on 100 parts by weight of the mortar Bubbles and pinholes may occur after the FRP panel composition is cured. If the content exceeds 3 parts by weight, the hardness is increased and the viscosity is increased.

The FRP panel composition according to the present invention having the above-described structure, specifically, the hybrid FRP panel composition including mortar is used as a panel for maintenance and reinforcement of a concrete structure.

In this case, any method may be used as a method for manufacturing a panel using the FRP panel composition as long as it is a conventional method in the art. However, in order to explain the present invention more easily, one example will be described as follows. As one example, the method for producing an FRP panel according to the present invention is a method for manufacturing an FRP panel according to the present invention, wherein a mold or a mold comprises 50 to 80 parts by weight of a composite fiber, 30 to 90 parts by weight of a phenol resin, 1 to 10 parts by weight of a lightweight material, 5 to 30 parts by weight of a ceramic particle, 10 to 30 parts by weight of a stabilizer, 0.1 to 10 parts by weight of a re-applied polymer powder, 3 to 15 parts by weight of a flame retardant, 3 to 6 parts by weight of a release agent, 2 to 20 parts by weight of a binder, 20 to 20 parts by weight of modified silane silicate, 5 to 20 parts by weight of modified silane silicate, and 2 to 10 parts by weight of stabilizer.

As another example, a method for fabricating a FRP panel according to the present invention includes: a weaving step of fabricating a composite fiber by lattice-woven fabrics;

A resin composition comprising 30 to 90 parts by weight of a phenol resin, 1 to 10 parts by weight of a lightweight material, 5 to 30 parts by weight of a nano-ceramic particle, 10 to 30 parts by weight of a deformation preventing agent, 0.1 to 10 parts by weight of a re- 3 to 15 parts by weight of a flame retardant, 3 to 6 parts by weight of a release agent, 2 to 20 parts by weight of a binder, 2 to 20 parts by weight of a curing agent, 5 to 20 parts by weight of a modified silane silicate and 2 to 10 parts by weight of a stabilizer, Preparing a fabric fiber layer by mixing 50 to 80 parts by weight of the fabric fiber so that each composition is impregnated into the fabric fiber;

A mesh network laminating step of laminating a fiber mesh net made by weaving a fiber so that the impregnated fabric fiber layer has a lattice of 10 to 25 mm; And

And a curing step of curing in a closed space at a temperature range of 40 to 60 DEG C after the mesh network laminating step is completed.

Here, the weft yarns in the weaving step are woven so that the weft yarns and the warp yarns are vertically engaged to minimize the occurrence of later sagging and unraveling.

The yarn thickness of the composite fibers used in the woven fibers is preferably at least 10 μm or more, and the thickness of the knots is kept constant at about 5 mm. The thickness of the fabric after the weaving is reduced to 0.345 to 0.38 mm To form high strength woven fibers.

The fiber mesh net according to the present invention comprises a composite fiber woven into a lattice having 10 to 25 mm.

When the curing temperature in the curing step according to the present invention is higher than necessary, for example, higher than 60 ° C, it is preferable to maintain an appropriate temperature since bubbles can be expressed early in the resin system.

Here, if the curing temperature is kept below 50 ° C, the curing time is long.

Specifically, in the method of manufacturing an FRP panel according to the present invention, the fabric fiber layer may be repeatedly laminated to form a plurality of fabric fiber layers.

A construction method using the FRP panel manufactured by the above-described method will be described as follows. Here, the following method of construction is not limited to the embodiment of the FRP panel, and any method may be used as long as it is a construction method for repairing and reinforcing concrete structures using conventional FRP panels in the art.

As one example, the method of constructing an FRP panel according to the present invention comprises: a surface treatment step of finely treating a surface to be repaired or reinforced of a concrete structure;

A primer applying step of applying an epoxy primer after the surface treatment step is finished;

After completion of the primer coating step, 50 to 80 parts by weight of the composite fiber, based on 100 parts by weight of the mortar; 5 to 30 parts by weight of calcium sulfoaluminate; 1 to 10 parts by weight of a lightweight material; 5 to 30 parts by weight of nano-ceramic particles; 0.1 to 10 parts by weight of a re-forming type polymer powder; 0.1 to 10 parts by weight of a polyvinyl alcohol powder; 3 to 15 parts by weight of a flame retardant; 3 to 6 parts by weight of a release agent; 2 to 20 parts by weight of a binder; 2 to 20 parts by weight of a curing agent; 5 to 20 parts by weight of a modified silane silicate; Bonding a panel made of an FRP panel composition comprising 2 to 10 parts by weight of a stabilizer; And

As another example, a method of constructing an FRP panel according to the present invention includes: a surface treatment step of finely treating a surface to be repaired and / or reinforced in a concrete structure;

A primer applying step of applying an epoxy primer after the surface treatment step is finished; Bonding an FRP panel manufactured according to the FRP panel manufacturing method after the primer application step is completed, and then fixing the FRP panel with an anchor; And

And an adhesive injecting step of injecting an adhesive between the FRP panel and the object surface after completing the FRP panel joining step.

Here, the method of constructing the FRP panel may further include a sealing step of covering an anchor head fixed with an anchor according to a user's selection, sealing the cap with an adhesive, and sealing the cap.

The adhesive used in the adhesive injecting step may be any adhesive as long as it is a conventional adhesive in the art. Preferably, an epoxy resin, a urethane resin, an acrylic resin, or a mixture thereof may be used.

Hereinafter, the present invention will be described in detail by way of examples. However, the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[Production of denatured silane silicate]

100 g of lithium silicate, and 1 g of vinyltrimethoxysilane were mixed, and the mixture was sieved at 97 DEG C and 300 rpm for 1.5 hours to prepare a modified silane silicate.

[Example 1]

5 g of a mortar mixed with cement and sand in a weight ratio of 5: 5, 45 g of a phenol resin, 5 g of a lightweight material made of a completely discarded acrylic resin having a fine film thickness of 0.1 탆, 15 g of a silicon carbide powder having an average particle size of 400 nm, 5 g of vinyl acetate / vinyl acetate, 8 g of aluminum hydroxide, 5 g of zinc stearate, 10 g of sodium silicate, 10 g of paratoluene sulfonic acid, 10 g of modified silane silicate, 5 g of non-yellowing polyurea resin and 5 g of basalt fiber and glass fiber 5 : &Lt; / RTI > 5 by weight to prepare an FRP panel composition.

[Example 2]

The procedure of Example 1 was repeated, except that 10 g of limestone powder was further added.

[Example 3]

6 g of expanded graphite having a density of 2.0 g / cm 3 and an average particle size of about 500 μm was further added in the same manner as in Example 1.

[Example 4]

The procedure of Example 1 was repeated except that 15 g of talc was added.

[Example 5]

The procedure of Example 1 was repeated, except that 3 g of aminopropane triepoxysilane was added as a catalyst.

[Example 6]

The procedure of Example 1 was repeated, except that 3 g of sodium metasilicate was further added.

[Example 7]

The same procedure as in Example 1 was carried out except that 5 g of an absorbent polymer composed of a polyacrylate was further added.

[Example 8]

The procedure of Example 1 was repeated, except that 7 g of sodium alginate was further added.

[Example 9]

The procedure of Example 1 was repeated, except that 15 g of foamed pearlite was further added.

[Example 10]

The procedure of Example 1 was repeated, except that 5 g of tetraethylene pentamine was further added.

[Example 11]

The procedure of Example 1 was repeated, except that 5 g of crosslinked polyacrylate salt was further added.

[Example 12]

The procedure of Example 1 was repeated, except that 2 g of calcium oxide was further added.

[Example 13]

The FRP panel composition according to Example 1 was mixed to impregnate the FRP panel composition with the woven fiber to prepare a woven fiber layer.

The fibers constituting the FRP panel composition were prepared by weaving fibers mixed with a weight ratio of 5: 5 of basalt fibers and glass fibers having a thickness of 15 탆 to prepare a woven fiber having a thickness of about 0.36 mm Respectively.

Next, 10 g of mesh net made to have a grid of about 20 mm was laminated using a fiber yarn mixed with basalt fiber and glass fiber in a weight ratio of 5: 5.

Then, the panel in which the mesh net was laminated was cured in a closed space maintained at a temperature of about 50 캜 to produce an FRP panel.

[Example 14]

The procedure of Example 13 was repeated except that the FRP panel prepared in Example 2 was used instead of the FRP panel composition prepared in Example 1.

[Example 15]

The same procedure as in Example 13 was carried out except that the FRP panel prepared according to Example 3 was used in place of the FRP panel composition prepared according to Example 1.

[Example 16]

The procedure of Example 13 was repeated except that the FRP panel prepared in Example 4 was used instead of the FRP panel composition prepared in Example 1.

[Example 17]

The procedure of Example 13 was repeated except that the FRP panel prepared in Example 5 was used instead of the FRP panel composition prepared in Example 1.

[Example 17]

The same procedure as in Example 13 was carried out except that the FRP panel prepared according to Example 6 was used in place of the FRP panel composition prepared according to Example 1.

[Example 19]

The same procedure as in Example 13 was carried out except that the FRP panel prepared according to Example 7 was used in place of the FRP panel composition prepared according to Example 1.

[Example 20]

Except that the FRP panel prepared according to Example 8 was used in place of the FRP panel composition prepared according to Example 1,

[Example 21]

The same procedure as in Example 13 was carried out except that the FRP panel prepared according to Example 9 was used in place of the FRP panel composition prepared according to Example 1.

[Example 22]

The same procedure as in Example 13 was carried out except that the FRP panel prepared according to Example 10 was used in place of the FRP panel composition prepared according to Example 1.

[Example 23]

Except that the FRP panel prepared according to Example 11 was used in place of the FRP panel composition prepared according to Example 1,

[Example 24]

The procedure of Example 13 was repeated except that the FRP panel prepared in Example 12 was used instead of the FRP panel composition prepared in Example 1.

[Experiment]

The mechanical properties such as ductility, compressive strength, flexural strength and adhesion strength of the FRP panels prepared according to Examples 13 to 24 were measured.

The results are shown in Table 1.

Fire propagation Compressive strength (N / mm ² ) Bending strength (N / mm ² ) Bond strength (N / mm ² ) Example 13 8? 51.1 16.7 1.8 Example 14 8? 50.6 16.3 1.7 Example 15 9? 51.5 16.9 1.8 Example 16 8? 49.9 14.8 1.5 Example 17 7? 48.8 16.1 1.8 Example 18 8? 52.3 16.3 1.7 Example 19 7? 53.6 16.6 1.6 Example 20 8? 51.5 15.9 1.5 Example 21 7? 52.3 16.1 1.6 Example 22 7? 52.6 14.4 1.6 Example 23 8? 52.4 15.1 1.7 Example 24 7? 52.6 14.4 1.6

As shown in Table 1, the FRP panels produced according to Examples 13 to 24 exhibited good fire resistance, compressive strength and bending strength, and excellent adhesion.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are all illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.

Claims

On the basis of 100 parts by weight of mortar,
50 to 80 parts by weight of composite fibers;
30 to 90 parts by weight of a phenolic resin;
1 to 10 parts by weight of a lightweight material;
5 to 30 parts by weight of nano-ceramic particles;
10 to 30 parts by weight of an anti-deformation agent;
0.1 to 10 parts by weight of a re-forming type polymer powder;
3 to 15 parts by weight of a flame retardant;
3 to 6 parts by weight of a release agent;
2 to 20 parts by weight of a binder;
2 to 20 parts by weight of a curing agent;
5 to 20 parts by weight of a modified silane silicate; And
2 to 10 parts by weight of a stabilizer is added to the FRP panel composition,
Further comprising 5 to 20 parts by weight of limestone powder based on 100 parts by weight of the mortar,
Further comprising 5 to 10 parts by weight of expanded graphite based on 100 parts by weight of the mortar,
Further comprising 0.1 to 5 parts by weight of the catalyst based on 100 parts by weight of the mortar,
Further comprising 1 to 5 parts by weight of sodium metasilicate based on 100 parts by weight of the mortar,
Further comprising 5 to 10 parts by weight of sodium alginate based on 100 parts by weight of the mortar,
Further comprising 10 to 30 parts by weight of foamed material based on 100 parts by weight of the mortar,
Further comprising 1 to 10 parts by weight of tetraethylenepentamine based on 100 parts by weight of the mortar,
Further comprising 1 to 10 parts by weight of a crosslinked polyacrylate salt based on 100 parts by weight of the mortar,
And 1 to 3 parts by weight of calcium oxide based on 100 parts by weight of the mortar.

delete

A surface treatment step of surface-treating the surface of the concrete structure to be repaired or reinforced;
A primer applying step of applying an epoxy primer after the surface treatment step is finished;
After completion of the primer coating step, 50 to 80 parts by weight of the composite fiber, 30 to 90 parts by weight of the phenol resin, 1 to 10 parts by weight of the lightweight material, 5 to 30 parts by weight of the nanoceramic particles, 10 to 30 parts by weight of a re-oiling type polymer powder, 3 to 15 parts by weight of a flame retardant, 3 to 6 parts by weight of a release agent, 2 to 20 parts by weight of a binder, 2 to 20 parts by weight of a curing agent, By weight based on 100 parts by weight of the mortar and 5 to 20 parts by weight of expanded graphite by 5 to 10 parts by weight based on 100 parts by weight of the mortar in the FRP panel composition comprising 2 to 10 parts by weight of the stabilizer, Further comprising 0.1 to 5 parts by weight of the catalyst based on 100 parts by weight of the mortar and further comprising 1 to 5 parts by weight of sodium metasilicate based on 100 parts by weight of the mortar, Further comprising 5 to 10 parts by weight of sodium based on 100 parts by weight of the mortar, wherein the foamed material further comprises 10 to 30 parts by weight based on 100 parts by weight of the mortar, wherein the tetraethylenepentamine is used in an amount of 1 to 10 parts by weight And further comprising 1 to 10 parts by weight of crosslinked polyacrylate salt based on 100 parts by weight of the mortar and further comprising 1 to 3 parts by weight of calcium oxide based on 100 parts by weight of the mortar, ; And
And an adhesive injection step of injecting an adhesive between the FRP panel and the object surface after the joining step is completed.