KR102737481B1 - Functional a fast-hard type road pavement repair material composition and road repair method using the same - Google Patents

Abstract

The present invention relates to a functional fast-setting road pavement repair material composition which enables easy and quick repair work, and has excellent maintenance performance due to high elastic modulus and tensile strength, and to a road repair method using the same. According to an embodiment of the present invention, the functional fast-setting road pavement repair material composition has excellent bond strength, tensile strength and elongation, thereby preventing crack filling, lifting and peeling of the road due to brittleness, enables integral movement with the base surface, reduces dead load, is suitable for bridge overlay repair, and has excellent wear resistance, chemical resistance and durability, thereby having the advantages of extending the durability service life.

Description

Functional fast-hard type road pavement repair material composition and road repair method using the same {Functional a fast-hard type road pavement repair material composition and road repair method using the same}

The present invention relates to a functional fast-setting road pavement repair composition, and more specifically, to a functional fast-setting road pavement repair composition which enables easy and quick repair work while having excellent maintenance performance due to high elastic modulus and tensile strength, and a road repair method using the same.

In general, cracks occur in asphalt pavements after construction due to aging and repeated traffic loads. Recently, due to urban redevelopment, the number of large vehicles and overloaded vehicles has increased, and damaged areas have occurred in multiple locations. Accordingly, the repair period for pavements has gradually gotten earlier and more areas needing repair have occurred. Partial repairs must be performed on the damaged areas of the pavement in a timely manner in order to continuously maintain the pavement layer. If not, the pavement damage will accelerate due to water seeping in through the cracks, which may result in the need for large-scale repairs, resulting in enormous economic losses.

Accordingly, when damage such as potholes occurs on paved roads, the road is controlled and emergency construction is carried out to carry out emergency repairs. In general, emergency road repair materials are mainly repair materials using room-temperature asphalt, which is similar to the material used for existing roads and has the disadvantage of deteriorating again within 6 to 7 months.

In addition, conventional rapid-setting cements for emergency repair have higher heat of hydration than ordinary Portland cement, are prone to micro-cracks due to drying shrinkage and internal stress remaining inside the structure, and have problems in that they have low surface strength and durability due to laitance caused by bleeding on the surface, which directly and indirectly affect the mechanical properties of concrete structures and can have a negative effect on the stability of concrete structures.

Accordingly, a new fast-setting road pavement repair material composition with excellent maintenance performance is required as a road repair material for emergency construction.

Republic of Korea Patent No. 10-1454400 Republic of Korea Patent No. 10-1547895

The purpose of the present invention is to provide a functional fast-setting road pavement repair material composition having excellent fast-setting properties, elastic modulus and tensile strength.

Another object of the present invention is to provide a road repair method using the functional fast-setting road pavement repair material composition.

The problems to be solved are not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

One embodiment of the present invention provides a functional fast-setting road pavement repair material composition having excellent elastic modulus and tensile strength. The functional fast-setting road pavement repair material composition comprises 5 to 75 wt% of a performance-improving binder, 10 to 90 wt% of a functional filler, and 0.1 to 10 wt% of a hardening regulator; The above performance-improving binder contains, with respect to 100 parts by weight of methyl methacrylate, 1 to 30 parts by weight of a butylacrylate-styrene copolymer, 1 to 25 parts by weight of a 2-ethylhexylacrylate mixture, 0.1 to 20 parts by weight of a polymethyl methacrylate-butyl(meth)acrylate copolymer, 1 to 20 parts by weight of a crosslinking agent, 1 to 20 parts by weight of an air barrier agent, 0.01 to 15 parts by weight of a polymerization regulator, 0.01 to 15 parts by weight of a dispersant, and 0.01 to 15 parts by weight of an anti-sedimentation agent; the 2-ethylhexylacrylate mixture is a mixture of 2-ethylhexylacrylate and vinylidene fluoride or vinyl acetate; The functional filler contains 100 parts by weight of silicon dioxide, 10 to 30 parts by weight of heavy calcium carbonate, 1 to 30 parts by weight of silylated ceramic particles, 1 to 20 parts by weight of potassium acetate, 0.1 to 10 parts by weight of surface-treated silica powder, and 0.1 to 10 parts by weight of soda lime borosilicate; and the curing regulator is characterized in that at least one selected from the group consisting of benzoyl peroxide, acetyl peroxide, dilauryl peroxide, di-tert-butyl peroxide, cumyl hydroperoxide, hydrogen peroxide, and potassium persulfate.

The above cross-linking agent may be a mixture of a core-shell structured silver-silane coupling agent nanoparticle in which the silane coupling agent is surrounded on the surface of the silver (Ag) nanoparticle and a metal silicate.

The above performance-improving binder may further contain 0.5 to 3 parts by weight of an eriodictyol compound per 100 parts by weight of methyl methacrylate.

The above silylated ceramic nanoparticles can be manufactured by a method including a step of mixing 100 parts by weight of purified water, 80 to 130 parts by weight of an ethylene vinyl silane copolymer, and 50 to 100 parts by weight of ceramic nanoparticles at 30 to 40°C.

The above-mentioned silylated ceramic nanoparticles may additionally contain 1 to 10 parts by weight of basocuproine (BCP) per 100 parts by weight of the purified water.

The surface-treated silica powder can be manufactured by a method including a step of adding polysiloxane to silica powder and heat-treating at 600 to 1000°C; and a step of mixing 100 parts by weight of the silica powder treated with polysiloxane under adjustment of 10 to 30 parts by weight of a trimethylsilylating agent, 1 to 5 parts by weight of butylhydroxyanisole, 1 to 10 parts by weight of sorbitan lipid (SLP), and 30 to 50 parts by weight of water.

In addition, another embodiment of the present invention provides a road repair method using the functional fast-setting road pavement repair material composition. The road repair method comprises the steps of: cleaning the surface of a repair area requiring repair; applying a performance-improving binder to the repair area, the surface of which has been cleaned, to form a performance-improving binder coating layer; applying the functional fast-setting road pavement repair material composition to the performance-improving binder coating layer, to form a road pavement repair material composition coating layer; And a curing step, wherein the road repair method further comprises a step of penetrating a performance-improving binder into the cracked area before applying the performance-improving binder to the repair area whose surface has been cleaned when cracks occur on the surface of the repair area, wherein the performance-improving binder contains, with respect to 100 parts by weight of methyl methacrylate, 1 to 30 parts by weight of a butylacrylate-styrene copolymer, 1 to 25 parts by weight of a 2-ethylhexylacrylate mixture, 0.1 to 20 parts by weight of a polymethyl methacrylate-butyl(meth)acrylate copolymer, 1 to 20 parts by weight of a crosslinking agent, 1 to 20 parts by weight of an air barrier, 0.01 to 15 parts by weight of a polymerization regulator, 0.01 to 15 parts by weight of a dispersant, and 0.01 to 15 parts by weight of an anti-sedimentation agent; The above 2-ethylhexylacrylate mixture is characterized by being a mixture of 2-ethylhexylacrylate and vinylidene fluoride or vinyl acetate.

According to a functional fast-setting road pavement repair composition according to one embodiment of the present invention, the composition has excellent bond strength, tensile strength and elongation, thereby preventing crack filling, lifting and peeling of the road due to brittleness, enables integral movement with the base surface, reduces dead load, is suitable for bridge overlay repair, and has excellent wear resistance, chemical resistance and durability, thereby having advantages of extending the service life.

In addition, according to the functional fast-setting road pavement repair material composition according to one embodiment of the present invention, it has excellent heat-insulating and thermal-insulating effects, so that a snow-melting effect can be realized, and there is an advantage of securing flexibility (cold resistance) at low temperatures and stability at high temperatures.

In addition, the above-mentioned slip resistance performance and characteristic odor reduction can be achieved to ensure safety, usability, and convenience for pedestrians and drivers.

In addition, calcium chloride, sodium chloride, etc., which are used as existing snow melting agents, can achieve snow melting effects, but they have the problem of causing corrosion of road facilities, vehicles, etc. due to the dissolution of calcium chloride, sodium chloride, etc. during snow melting. However, this problem can be improved by using potassium acetate, which has almost no corrosiveness.

In addition, according to a road repair method using a functional fast-setting road pavement repair material composition according to one embodiment of the present invention, the work process is simple and continuous work is possible, so that the construction period can be shortened, and at the same time, due to fast-setting, the curing time is short, so that traffic can be opened within a short period of time (2 hours at 25°C after construction).

In addition, according to a road repair method using a functional fast-setting road pavement repair material composition according to one embodiment of the present invention, there is an advantage in that it is suitable for repairing structures such as asphalt concrete and cement concrete pavements, bridge overlay pavements, parking lot slabs, factory slabs, etc., due to excellent waterproofing properties, salt resistance, freeze-thaw resistance, and neutralization resistance.

Hereinafter, the present invention will be described in more detail.

Prior to this, the terms used in this specification and claims should not be interpreted as limited to their dictionary meanings, and should be interpreted as meanings and concepts that conform to the technical idea of the present invention, based on the principle that the inventor can appropriately define the concept of the term in order to explain his or her invention in the best way.

Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are only preferred embodiments of the present invention and do not express all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist that can replace them at the time of filing this application.

One aspect of the present invention provides a functional fast-setting road pavement repair composition.

A functional fast-setting road pavement repair material composition according to one embodiment of the present invention comprises 5 to 75 wt% of a performance-improving binder, 10 to 90 wt% of a functional filler, and 0.1 to 10 wt% of a hardening regulator.

It is preferable that the above performance-improving binder contains, with respect to 100 parts by weight of methyl methacrylate, 1 to 30 parts by weight of a butylacrylate-styrene copolymer, 1 to 25 parts by weight of a 2-ethylhexylacrylate mixture, 0.1 to 20 parts by weight of a polymethyl methacrylate-butyl(meth)acrylate copolymer, 1 to 20 parts by weight of a crosslinking agent, 1 to 20 parts by weight of an air barrier agent, 0.01 to 15 parts by weight of a polymerization regulator, 0.01 to 15 parts by weight of a dispersant, and 0.01 to 15 parts by weight of an anti-sedimentation agent.

The above methylmethacrylate (MMA) has excellent weather resistance, which means it can withstand weather and climate such as sunlight, and thus suppresses corrosion caused by changes in the external environment. At the same time, it penetrates into the packaging body and becomes integral therewith, thereby improving bonding strength and toughness, and enhancing the hardness, wear resistance, and impact resistance of the repair material layer. The above methylmethacrylate is an ultra-fast curing elastic resin, and it is preferable that the components described below are included based on 100 parts by weight of the above methylmethacrylate.

The above butylacrylate-styrene copolymer lowers the viscosity of the road paving repair material composition to improve the workability and flexibility properties, and has excellent acid resistance and alkali resistance to improve the strength. The butylacrylate-styrene copolymer is preferably contained in the range of 1 to 30 parts by weight based on 100 parts by weight of methyl methacrylate. If the content of the butylacrylate-styrene copolymer is too low, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the butylacrylate-styrene copolymer is too high, there is a problem that the acid resistance and strength improvement effects may be insufficient.

The above 2-ethylhexylacrylate increases the elongation of the ultra-fast curing elastic resin to improve the flexibility of the repair layer, thereby preventing cracks from occurring in the repair layer, improving the adhesion of the repair layer, having compatibility with other resins, and improving toughness and weather resistance. The above 2-ethylhexylacrylate may be included in the form of a mixture with other resins, such as vinylidene fluoride or vinyl acetate having a refractive index of its own polymer in the range of 1.4 to 1.9.

It is preferable that the 2-ethylhexy acrylate mixture is contained in an amount of 1 to 25 parts by weight per 100 parts by weight of methyl methacrylate. If the content of the 2-ethylhexy acrylate mixture is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the 2-ethylhexy acrylate mixture is too large, there is a problem that workability and durability may be reduced.

The above polymethyl methacrylate-butyl (meth)acrylate copolymer has excellent crack response performance and serves to provide excellent adhesion strength, waterproofing, weather resistance, as well as excellent wear resistance and heat insulation performance.

Such polymethyl methacrylate-butyl (meth)acrylate copolymer may be a copolymer copolymerized with 30 to 90 wt% of methyl methacrylate, 9 to 69 wt% of butyl (meth)acrylate, and 1 wt% or less of a vinyl monomer mixture. The vinyl monomer may be selected from the group consisting of vinylidene chloride, 2-vinylthiophene, vinylphenyl sulfide, vinylnaphthalene, vinylcarbazole, and mixtures of two or more thereof.

The polymethyl methacrylate-butyl (meth)acrylate copolymer is preferably contained in an amount of 1 to 20 parts by weight per 100 parts by weight of methyl methacrylate. If the content of the polymethyl methacrylate-butyl (meth)acrylate copolymer is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the polymethyl methacrylate-butyl (meth)acrylate copolymer is too large, there is a problem that the weather resistance may be reduced.

The cross-linking agent plays a role of improving the reactivity and shrinkage problem during curing. The cross-linking agent is characterized by being a mixture of silver-silane coupling agent nanoparticles having a core-shell structure in which a silane coupling agent is surrounded on the surface of silver (Ag) nanoparticles, and a metal silicate. At this time, the silane coupling agent may be at least one selected from the group consisting of 3-aminopropyltriepoxy silane, 3-metaglyclyoxypropyltrimethoxy silane, and 3-glycidoxypropyltrimethoxy silane, and the metal silicate may be at least one selected from the group consisting of lithium polysilicate, sodium polysilicate, and potassium polysilicate.

The cross-linking agent can be produced by a method including: i) preparing a solution containing a silver precursor stabilized by a dispersing agent; ii) dispersing a silane coupling agent in the solution containing the silver precursor to produce a dispersion; iii) adding a reducing agent to the dispersion to reduce the silver precursor to produce silver-silane coupling agent nanoparticles having a core-shell structure in which the silane coupling agent is surrounded on the surface of silver nanoparticles; and iv) mixing the silver-silane coupling agent nanoparticles having a core-shell structure with a metal silicate.

It is preferable that the crosslinking agent is contained in an amount of 1 to 20 parts by weight per 100 parts by weight of methyl methacrylate. If the content of the crosslinking agent is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the crosslinking agent is too large, there is a problem that flexibility may be reduced and mechanical strength may be reduced after curing.

The above air barrier agent can effectively prevent strength degradation and plays a role in making the appearance of the dried film more attractive. A nonionic or silicone compound commonly used in the field can be used.

It is preferable that the air blocking agent be contained in an amount of 1 to 20 parts by weight per 100 parts by weight of methyl methacrylate. If the content of the air blocking agent is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the air blocking agent is too large, there is a problem that the efficiency may be reduced compared to the amount used.

The above polymerization regulator plays a role in controlling the polymerization reaction by appropriately using a polymerization promoter that promotes the reaction or a polymerization inhibitor that delays the reaction to secure working time. The above polymerization inhibitor or polymerization promoter is not particularly limited as it is generally used in the relevant field, and for example, citric acid can be used as the polymerization inhibitor, and at least one selected from the group consisting of stannate octolate (T-9), dibutyl tin dilaurate (DBTDL), and tertiary amine compounds can be used as the polymerization promoter.

It is preferable that the polymerization regulator be contained in an amount ranging from 0.01 to 15 parts by weight per 100 parts by weight of methyl methacrylate. If the content of the polymerization regulator is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the polymerization regulator is too large, there is a problem that the efficiency may be reduced relative to the amount used.

The above dispersant plays a role in evenly dispersing the components that make up the composition. The above dispersant is one that is commonly used in the art and is not particularly limited, but for example, high molecular weight condensed sodium naphthalene sulfonate or calcium naphthalene sulfonate can be used.

It is preferable that the dispersant be contained in an amount ranging from 0.01 to 15 parts by weight per 100 parts by weight of methyl methacrylate. If the content of the dispersant is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the dispersant is too large, there is a problem that the efficiency may be reduced relative to the amount used.

The above anti-sedimentation agent prevents hard caking caused by precipitation of components constituting the composition, thereby enabling long-term storage. The anti-sedimentation agent is not particularly limited as it is generally used in the field, but for example, at least one selected from the group consisting of xanthan gum, gum arabic, polyacrylamide, polyethylene oxide, glycerin, sodium polyphosphate, aluminum stearate, and zinc stearate may be used.

It is preferable that the anti-sedimentation agent be contained in an amount ranging from 0.01 to 15 parts by weight per 100 parts by weight of methyl methacrylate. If the content of the anti-sedimentation agent is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the anti-sedimentation agent is too large, there is a problem that the smoothness is lost and the painted surface is not formed evenly.

The performance-improving binder according to the present invention may further include an eriodictyol compound to further improve fast-setting properties and adhesion, and particularly to enhance flexibility at low temperatures.

It is preferable to contain 0.5 to 3 parts by weight of the eriodictyol compound per 100 parts by weight of methyl methacrylate.

It is preferable that the above functional filler contains 100 parts by weight of silicon dioxide, 10 to 30 parts by weight of heavy calcium carbonate, 1 to 30 parts by weight of silylated ceramic particles, 1 to 20 parts by weight of potassium acetate, 0.1 to 10 parts by weight of surface-treated silica powder, and 0.1 to 10 parts by weight of soda lime borosilicate.

The above silicon dioxide plays a role in improving the road, fire resistance, water resistance and rust prevention properties.

The above heavy calcium carbonate plays a role in improving the filling and strength. In general, calcium carbonate is largely divided into two types, heavy calcium carbonate and light calcium carbonate, depending on the manufacturing method. Heavy calcium carbonate is calcium carbonate manufactured by crushing and classifying white crystalline calcite, and because it has a high whiteness, it is also called white calcium carbonate. On the other hand, light calcium carbonate is calcium carbonate manufactured chemically by calcining limestone, and is also called precipitated calcium carbonate.

It is preferable that the heavy calcium carbonate be contained in an amount ranging from 10 to 30 parts by weight per 100 parts by weight of silicon dioxide. If the content of the heavy calcium carbonate is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the heavy calcium carbonate is too large, there is a problem that workability may be reduced.

The ceramic nanoparticles contained in the functional filler serve to enhance adhesiveness, improve wear resistance and impact resistance, prevent microcracks and shrinkage, and exhibit heat and thermal insulation properties. The ceramic particles may be ceramic nanoparticles silylated with an ethylene vinyl silane copolymer in order to enhance miscibility within the composition. Specifically, the silylated ceramic nanoparticles according to the present invention may be manufactured by a method including a step of mixing 100 parts by weight of purified water, 80 to 130 parts by weight of an ethylene vinyl silane copolymer, and 50 to 100 parts by weight of ceramic nanoparticles at 30 to 40°C.

The above ethylene vinylsilane copolymer can be prepared by polymerizing ethylene with, for example, a vinyl trialkoxy silane comonomer or by grafting such a comonomer onto an ethylene polymer backbone.

Additionally, the silylated ceramic nanoparticles may additionally contain basocuproine (BCP) to improve stability to heat and light.

It is preferable that the above-mentioned vasocubeproin is contained in the range of 1 to 10 parts by weight per 100 parts by weight of the purified water. If the content is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content is too large, there is a problem that the economic feasibility may be reduced.

It is preferable that these silylated ceramic nanoparticles are contained in an amount ranging from 10 to 30 parts by weight per 100 parts by weight of silicon dioxide. If the content of the silylated ceramic particles is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the silylated ceramic particles is too large, there is a problem that physical properties such as adhesion to the coating film and tensile strength may be reduced.

The ceramic nanoparticles used in the present invention may be any one of alumina, zirconia, barium titanate, and titanium oxide, and may be manufactured by adding ethylene glycol and/or diethylene glycol to an aqueous solution of a ceramic raw material having rapid hydrolysis to control the hydrolysis rate.

The above ceramic raw material may use an alkoxide or metal salt of at least one metal selected from Al, Ba, Mg, Ca, La, Fe, Si, Ti, Zr, Pb, Sn, Zn, Cd, As, Ga, Sr, Bi, Ta, Se, Te, Hf, Mg, Ni, Mn, Co, S, Ge, Li, B, and Ce.

The above ceramic nanoparticles may be obtained by controlling pH when hydrolyzing the above ceramic raw material.

The above potassium acetate has very high solubility, so it has excellent anti-freezing effect, and has excellent heat-insulating and insulating effects, so it can implement a snow-melting effect, and can secure flexibility (cold resistance) at low temperatures and stability at high temperatures. The above potassium acetate is preferably contained in the range of 1 to 20 parts by weight per 100 parts by weight of silicon dioxide. If the content is too little, there is a problem that the above effect may be insufficient, and if the content is too much, there is a problem that the economic feasibility may be reduced.

The surface-treated silica powder contained in the functional filler according to the present invention improves dispersibility within the composition, thereby enhancing strength, hardness, heat resistance, corrosion resistance, and wear resistance.

The surface-treated silica powder can be manufactured by including a step of adding polysiloxane to silica powder and heat-treating at 600 to 1000°C; and a step of mixing 100 parts by weight of the silica powder treated with polysiloxane under adjustment of 10 to 30 parts by weight of a trimethylsilylating agent, 1 to 5 parts by weight of butylhydroxyanisole, 1 to 10 parts by weight of sorbitan lipid (SLP), and 30 to 50 parts by weight of water.

The silica powder described above is generally used in the art and is not particularly limited, but is preferably fumed silica, for example. The butylhydroxyanisole and sophorolipid (SLP) provide excellent workability and excellent compatibility between materials, and play a role in improving crack resistance and durability. The surface-treated silica powder is preferably contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the silicon dioxide. If the content is too small, there is a problem that the above-mentioned effect may be insufficient, and if the content is too large, there is a problem that the economic feasibility may be reduced.

The above soda lime borosilicate is a hollow spherical particle with an average particle size of 15 to 135 um, and reduces the influence of external heat transfer (external environment and deterioration) on bonding strength, thereby improving holding performance. The above soda lime borosilicate is preferably contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the silicon dioxide. If the amount is too small, there is a problem that the above effect may be insufficient, and if the amount is too large, there is a problem that the economic feasibility may be reduced.

The above curing regulator may be a curing regulator generally used in the field to control the reaction, and may be, for example, at least one selected from the group consisting of benzoyl peroxide, acetyl peroxide, dilauryl peroxide, di-tert-butyl peroxide, cumyl hydroperoxide, hydrogen peroxide, and potassium persulfate.

Meanwhile, a method for manufacturing a functional fast-setting road pavement repair material composition according to a preferred embodiment of the present invention comprises adding 10 to 70 wt% of the performance-improving binder, 20 to 85 wt% of the functional filler, and 0.1 to 10 wt% of the hardening regulator and mixing the mixture with a forced mixer or a continuous mixer for a predetermined period of time (e.g., 1 to 5 minutes).

In addition, a road repair method using a functional fast-setting road pavement repair composition according to a preferred embodiment of the present invention comprises the steps of: preparing a surface of a repair area requiring repair; applying a performance-improving binder to the repair area, the surface of which has been prepared, to form a performance-improving binder coating layer; applying the functional fast-setting road pavement repair composition according to the present invention to the performance-improving binder coating layer, to form a road pavement repair composition coating layer; and a curing step.

The above-mentioned surface cleaning of the repaired part is performed by removing contaminants, laitance, impurities and deteriorated parts of the surface, cleaning them, and then drying them. The removal of the contaminants, laitance, impurities and deteriorated parts is performed using air, a surface crusher, a planer, a water blaster, a shot blaster, a sand blaster, etc., which are commonly used in the field. In addition, the surface cleaning can be performed using a vacuum suction device, and the cracked parts can be cleaned using compressed air.

Next, a performance-improving binder is applied to the repaired portion whose surface has been cleaned, thereby forming a performance-improving binder coating layer. The performance-improving binder coating layer can be performed to improve the bonding strength with the road pavement repair composition thereafter, and since the performance-improving binder is as described above, a detailed description thereof will be omitted to avoid redundancy. The performance-improving binder can be applied using a method known in the art, such as spraying, but is not limited thereto. In addition, when a crack occurs on the surface of the repaired portion, a step of penetrating the performance-improving binder into the cracked portion may be further included.

Next, the functional fast-setting road pavement repair composition according to the present invention is applied to the performance-improving bonding agent coating layer. In this step, the functional fast-setting road pavement repair composition may be applied multiple times by first applying it, then applying it a second time after it has hardened, and so on. The application may be applied using an application device or tool such as a roller or an application machine, and may be sprayed using a sprayer.

By performing the subsequent curing steps, the entire road repair can be completed.

According to a functional fast-setting road pavement repair composition according to one embodiment of the present invention, the composition has excellent bond strength, tensile strength and elongation, thereby preventing crack filling, lifting and peeling of the road due to brittleness, enables integral movement with the base surface, reduces dead load, is suitable for bridge overlay repair, and has excellent wear resistance, chemical resistance and durability, thereby having advantages of extending the service life.

In addition, according to the functional fast-setting road pavement repair material composition according to one embodiment of the present invention, it has excellent heat-insulating and thermal-insulating effects, so that a snow-melting effect can be realized, and there is an advantage of securing flexibility (cold resistance) at low temperatures and stability at high temperatures.

In addition, the above-mentioned slip resistance performance and characteristic odor reduction can be achieved to ensure safety, usability, and convenience for pedestrians and drivers.

In addition, calcium chloride, sodium chloride, etc., which are used as existing snow melting agents, can achieve snow melting effects, but they have the problem of causing corrosion of road facilities, vehicles, etc. due to the dissolution of calcium chloride, sodium chloride, etc. during snow melting. However, this problem can be improved by using potassium acetate, which has almost no corrosiveness.

In addition, according to a road repair method using a functional fast-setting road pavement repair material composition according to one embodiment of the present invention, the work process is simple and continuous work is possible, so that the construction period can be shortened, and at the same time, due to fast-setting, the curing time is short, so that traffic can be opened within a short period of time (2 hours at 25°C after construction).

In addition, according to a road repair method using a functional fast-setting road pavement repair material composition according to one embodiment of the present invention, there is an advantage in that it is suitable for repairing structures such as asphalt concrete and cement concrete pavements, bridge overlay pavements, parking lot slabs, factory slabs, etc., due to excellent waterproofing properties, salt resistance, freeze-thaw resistance, and neutralization resistance.

Hereinafter, examples of functional fast-setting road pavement repair compositions according to the present invention are presented in more detail, and the present invention is not limited to the examples presented below. In addition, comparative examples that can be compared with the examples are presented. It is to be noted that the comparative examples described below are presented simply to compare the characteristics of the examples and are not prior art of the present invention.

<Manufacturing Example 1> Manufacturing of silylated ceramic nanoparticles

1) Manufacturing of ceramic nanoparticles

Ceramic nanoparticles were manufactured by performing a hydrolysis reaction while mixing a hydrochloric acid aqueous solution with a pH of 2 as the first fluid and a 4% aluminum isopropoxide/IPA solution as the second fluid and uniformly mixing the IPA solution containing ceramic raw materials in the thin film.

2) Preparation of silylated ceramic nanoparticles

110 parts by weight of ethylene vinyl silane copolymer and 80 parts by weight of ceramic nanoparticles were added to 100 parts by weight of purified water, stirred at 30 to 40°C for about 2 hours to allow a reaction, and then filtered and washed to produce silylated ceramic nanoparticles.

<Manufacturing Example 2> Manufacturing of surface-treated silica powder

Polysiloxane was added to fumed silica (AEROSIL® 380) powder and heat-treated at 800°C. Thereafter, 100 parts by weight of the silica powder treated with polysiloxane was mixed in the presence of a mixture of 20 parts by weight of a trimethylsilylating agent, 3 parts by weight of butylhydroxyanisole, 7 parts by weight of sorbitan lipid (SLP), and 40 parts by weight of water, to prepare a surface-treated silica powder.

<Example 1-3 and Comparative Example 1-2>

A functional fast-setting road pavement repair material composition and a comparative composition were prepared by mixing 60 wt% of a performance-improving binder, 35 wt% of a functional filler, and 5 wt% of a hardening regulator in a mixing mixer for 2 minutes with the contents of the components shown in Table 1 below.

Classification (weight %) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Performance improvement binder 60 60 60 60 60 Methyl methacrylate 100 100 100 100 100 Butylacrylate-styrene copolymer 15 15 15 - - 2-Ethylhexylacrylate mixture 10 10 10 - - 2-Ethylhexyl acrylate - - - 10 - Polymethyl methacrylate-butyl (meth)acrylate copolymer 7 7 7 - - Crosslinker ¹⁾ 10 10 10 - - Crosslinker ²⁾ - - - 10 10 Air blocker 5 5 5 5 5 polymerization regulator 3 3 3 3 3 Dispersant 2 2 2 2 2 Anti-sedimentation agent 2 2 2 2 2 eriodictyol compound - 1.5 2 - - Functional filler 35 35 35 35 35 Silicon dioxide 100 100 100 100 100 Heavy calcium carbonate 20 20 20 - 20 silyl ceramic particles 10 10 10 - - Potassium acetate 3 3 3 - - Surface treated silica powder 2 2 2 - - Soda lime borosilicate 5 5 5 - - Fumed silica powder heat treated at 800℃ (AEROSIL® 380) - - - 3 - Fumed silica powder (AEROSIL® 380) - - - - 3 Hardening regulator 5 5 5 5 5 -Crosslinking agent ¹⁾ : Mixture of silver-silane coupling agent nanoparticles with core-shell structure and metal silicate
-Crosslinking agent ²⁾ : Trimethylolpropane triacrylate
-Air blocker: BYK-028 product, BYK
-Polymerization regulator: dibutyl tin dilaurate (DBTDL)
-Dispersant: Calcium naphthalene sulfonic acid salt
-Precipitation inhibitor: Xanthan gum
-Curing agent: Benzoyl peroxide

The test examples below show experimental results comparing the characteristics of Examples 1 to 3 according to the present invention with those of Comparative Examples 1 to 2 so that the characteristics of Examples 1 to 3 according to the present invention can be more easily understood.

<Example 1>

The functional fast-setting road pavement repair compositions manufactured according to Examples 1 to 3 and the comparative compositions manufactured according to Comparative Examples 1 to 2 were subjected to tests of absorption rate, adhesive strength (concrete and asphalt base surfaces), compressive strength (curing age 1 day), and abrasion resistance according to the standards of the Road Association, and the results are shown in Table 2 below.

item unit Quality standards Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Absorption rate % 1.0 or below 0.05 0.06 0.04 0.23 0.27 Adhesive strength concrete MPa 1.7 or higher 3.3 3.5 3.4 2.1 2.2 asphalt 1.0 or higher 1.7 1.9 1.9 1.2 1.1 Compressive strength 3 hours of re-entry MPa - 7.3 7.5 7.6 6.2 6.3 1st day of Jae-ryeong 34 and above 39 41 42 32 34 My wear test
(500,000 times) Wear rate % 1.0 or below 0.09 0.11 0.12 0.18 0.17 Slip resistance BPN 55 and above 88 89 88 79 80

As shown in Table 2 above, it was confirmed that the functional fast-setting road pavement repair material composition according to the present invention satisfies the quality standards and has superior performance compared to the comparative compositions of Comparative Examples 1 and 2.

<Example 2>

The functional fast-setting road pavement repair material compositions manufactured according to Examples 1 to 3 and the comparative compositions manufactured according to Comparative Examples 1 to 2 were subjected to tensile strength, elongation, and maximum elastic modulus tests according to the method specified in ASTM D638 (Standard Test Method for Tensile Properties of Plastics), and the results are shown in Table 3 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Tensile strength (MPa) 24.2 25.1 25.4 16.3 17.2 Elongation rate (%) 5.8 5.9 6.1 3.4 3.6 Maximum elastic modulus
(MPa) 75.2 76.5 76.8 71.4 72.5

As shown in Table 3 above, it was confirmed that the functional fast-setting road pavement repair material composition according to the present invention, after curing, had superior performance in terms of tensile strength, elongation, and maximum elastic modulus compared to the comparative composition.

<Example 3>

The functional fast-setting road pavement repair compositions manufactured according to Examples 1 to 3 and the comparative compositions manufactured according to Comparative Examples 1 to 2 were subjected to tests for water permeability, chloride ion penetration resistance, and length change rate according to the method specified in KS F 4043 (epoxy resin mortar for concrete structure repair), and the results are shown in Table 4 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Pitching amount (g) 0 0 0 0 0 Chloride ion penetration resistance (Coulombs) 1 0.4 0.3 15 17 Length change rate (%) 0.01 0.02 0.01 0.05 0.06

As shown in Table 4 above, it was confirmed that the functional fast-setting road pavement repair material composition according to the present invention, after curing, has much lower water permeability and chloride ion penetration resistance than the comparative composition, and has little shrinkage and thus almost no change in length, resulting in less occurrence of cracks.

<Example 4>

The functional fast-setting road pavement repair compositions manufactured according to Examples 1 to 3 and the comparative compositions manufactured according to Comparative Examples 1 to 2 were subjected to a freeze-thaw resistance test according to the method specified in KS F 2456. Freezing and thawing refers to the freezing and melting of moisture absorbed in concrete, and if freezing and thawing are repeated, fine cracks occur in the concrete structure, resulting in a problem of reduced durability. Accordingly, the durability indices of each of the Examples and Comparative Examples according to the freeze-thaw resistance test were measured and are shown in Table 5 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Durability Index 98 98 97 90 92

As shown in Table 5 above, it was confirmed that the functional fast-setting road pavement repair material composition according to the present invention has a significantly higher durability index after curing, thereby improving freeze-thaw resistance.

<Example 5>

The functional fast-setting road pavement repair material compositions manufactured according to Examples 1 to 3 and the comparative compositions manufactured according to Comparative Examples 1 to 2 were tested for viscosity, working time, shear bond strength, vapor pressure, surface dry bond strength, heat resistance, cold resistance, and accelerated weather resistance (presence of cracks), etc., by the following methods, and the results are shown in Table 6 below.

[Method of physical property test]

- Lyrics Time: ASTM C 2474

- Shear Bond Strength: ASTM C 882

- Vapor pressure: ASTM D 323

- Surface dry bond strength test: California Test 551

- Heat resistance (cracks): Exposure at 100±2℃ for 1 hour

- Cold resistance (cracks): Exposure at -20±1℃ for 1 hour

- Accelerated weathering (cracking): 10 hours

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Viscosity (cps) 15 14 17 27 25 Lyrics time
(gel time, minutes) 21 22 21 16 17 Shear bond strength
(MPa) 22.2 23.5 24.8 15.2 15.4 Vapor pressure (mmHg) 0.7 0.6 0.6 0.9 0.9 Surface dry bond strength (MPa) 4.5 4.7 4.6 3.4 3.5 Heat resistance
(100±2 ℃, 1 hour) No problem No problem No problem Occurrence of residual cracks Occurrence of residual cracks Cold resistance
(-20±1℃, 1 hour) No problem No problem No problem No problem Occurrence of residual cracks Accelerated weathering (10 hours) No problem No problem No problem No problem No problem

As shown in Table 6 above, it was confirmed that the functional fast-setting road pavement repair material composition according to the present invention, after curing, had superior physical properties compared to the comparative composition.

<Example 6>

The functional fast-setting road pavement repair compositions manufactured according to Examples 1 to 3 and the comparative compositions manufactured according to Comparative Examples 1 and 2 were each painted on the surface of a square container to a thickness of 2 mm. Thereafter, the inside of the square container made of a board was filled with 2/3 of 100°C water, left at room temperature, and the temperature was measured after 30 minutes, and the results are shown in Table 7. At this time, the initial indoor temperature was 18°C, the initial temperature inside each box was 10°C, and the temperature was measured using an electronic thermometer.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Temperature after 30 minutes (℃) 60.5 62.2 62.8 46.7 48.2

As shown in Table 7 above, it was confirmed that the functional fast-setting road pavement repair material composition according to the present invention, after curing, had superior heat-insulating and insulating effects compared to the comparative composition.

Above, although preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made by a person having ordinary skill in the art within the scope of the technical idea of the present invention.

Claims (7)

Comprising 5 to 75 wt% of a performance improving binder, 10 to 90 wt% of a functional filler, and 0.1 to 10 wt% of a curing regulator;
The above performance-improving binder contains, with respect to 100 parts by weight of methyl methacrylate, 1 to 30 parts by weight of a butylacrylate-styrene copolymer, 1 to 25 parts by weight of a 2-ethylhexylacrylate mixture, 0.1 to 20 parts by weight of a polymethyl methacrylate-butyl(meth)acrylate copolymer, 1 to 20 parts by weight of a crosslinking agent, 1 to 20 parts by weight of an air barrier agent, 0.01 to 15 parts by weight of a polymerization regulator, 0.01 to 15 parts by weight of a dispersant, and 0.01 to 15 parts by weight of an anti-sedimentation agent; the 2-ethylhexylacrylate mixture is a mixture of 2-ethylhexylacrylate and vinylidene fluoride or vinyl acetate;
The above functional filler contains 100 parts by weight of silicon dioxide, 10 to 30 parts by weight of heavy calcium carbonate, 1 to 30 parts by weight of silylated ceramic particles, 1 to 20 parts by weight of potassium acetate, 0.1 to 10 parts by weight of surface-treated silica powder, and 0.1 to 10 parts by weight of soda lime borosilicate;
The above hardening regulator is characterized in that it is at least one selected from the group consisting of benzoyl peroxide, acetyl peroxide, dilauryl peroxide, di-tert-butyl peroxide, cumyl hydroperoxide, hydrogen peroxide, and potassium persulfate.
A functional, fast-hardening road pavement repair composition. In the first paragraph,
A functional fast-hardening road pavement repair material composition, characterized in that the cross-linking agent is a mixture of a metal silicate and silver-silane coupling agent nanoparticles having a core-shell structure in which a silane coupling agent is surrounded on the surface of silver (Ag) nanoparticles. In the first paragraph,
A functional fast-setting road pavement repair material composition, characterized in that the performance-improving binder further contains 0.5 to 3 parts by weight of an eriodictyol compound per 100 parts by weight of methyl methacrylate. In the first paragraph,
A functional fast-setting road pavement repair material composition characterized in that the above-mentioned silylated ceramic nanoparticles are produced by a method including a step of mixing 100 parts by weight of purified water, 80 to 130 parts by weight of an ethylene vinyl silane copolymer, and 50 to 100 parts by weight of ceramic nanoparticles at 30 to 40°C. In paragraph 4,
A functional fast-hardening road pavement repair material composition, characterized in that the above-mentioned silylated ceramic nanoparticles additionally contain 1 to 10 parts by weight of basocuproine (BCP) per 100 parts by weight of the purified water. In the first paragraph,
A functional fast-setting road pavement repair material composition characterized in that the surface-treated silica powder is produced by a method including the steps of adding polysiloxane to silica powder and heat-treating at 600 to 1000°C; and the step of mixing 100 parts by weight of the silica powder treated with polysiloxane under adjustment of 10 to 30 parts by weight of a trimethylsilylating agent, 1 to 5 parts by weight of butylhydroxyanisole, 1 to 10 parts by weight of styrene-butyric acid (SLP), and 30 to 50 parts by weight of water. Step of preparing the surface of the repair area that requires repair;
A step of applying a performance-improving bonding agent to the repaired area of the surface to form a performance-improving bonding agent coating layer;
A step of applying a functional fast-setting road pavement repair material composition according to claim 1 to the performance-improving bonding agent coating layer to form a road pavement repair material coating layer; and
A road maintenance method including a curing step,
The above road repair method is used when cracks occur on the surface of the repaired area.
The above surface further comprises a step of penetrating a performance improvement bonding agent into a cracked area before applying the performance improvement bonding agent to the repaired area,
A road repair method, wherein the performance-improving binder contains, with respect to 100 parts by weight of methyl methacrylate, 1 to 30 parts by weight of a butylacrylate-styrene copolymer, 1 to 25 parts by weight of a 2-ethylhexylacrylate mixture, 0.1 to 20 parts by weight of a polymethyl methacrylate-butyl(meth)acrylate copolymer, 1 to 20 parts by weight of a crosslinking agent, 1 to 20 parts by weight of an air barrier agent, 0.01 to 15 parts by weight of a polymerization regulator, 0.01 to 15 parts by weight of a dispersant, and 0.01 to 15 parts by weight of an anti-sedimentation agent; and the 2-ethylhexylacrylate mixture is a mixture of 2-ethylhexylacrylate and vinylidene fluoride or vinyl acetate.