KR20180126269A - Method for preparing concrete crack penetrating sealing material, the concrete crack penetrating sealing material and the application method thereof - Google Patents

Abstract

The present invention relates to a method for producing a concrete road crack infusion repair material, a concrete road crack infusion repair material, and a construction method thereof. More specifically, the present invention relates to a method for producing a concrete road crack infusion repair material, which is capable of minimizing a traffic control time owing to four season construction properties and rapid curability, and also ensures excellent adhesion and durability against crack interfaces by being injected into concrete cracks and voids for anti-skid treatment on road surfaces through optimization of injection performance and a curing time. The present invention further relates to a concrete road crack infusion repair material, and a construction method thereof.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a concrete road crack infusion repair material, a concrete road crack infusion repair material, and a method of constructing the same. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete road crack infusion repair material,

The present invention relates to a concrete road cracking infusion repair material manufacturing method, a concrete road crack infusion repairing material and a construction method thereof, and more particularly, to a concrete road cracking infusion repairing material which improves the injection performance and curing time to inject concrete into road cracks and voids, The present invention relates to a method for manufacturing a road crack infusion repairing material, a concrete road crack infusion repairing material, and a construction method thereof, which are excellent in adhesion and durability against a crack interface and can minimize traffic control time due to seasonality and quickness.

Cement concrete pavement has different aging speed depending on the construction method, materials, construction and use management factors. Recent climate changes have had a great impact on the life of concrete, and there is a continuing need for maintenance methods for maintenance. There are many aging phenomena in cement concrete pavement due to physical factors such as increase in traffic volume, increase in load due to heavy vehicles, weak chemical resistance due to use environment of abnormal climate such as heavy rain, heavy rain, Most of the pavement in Korea is damaged by spalling in the joint line due to jointed concrete pavement, and cracks due to longitudinal and transverse cracking and deterioration due to brine are increasing on the surface of concrete. In addition, in the case of the bridge section of the bridge, the portholes and the expansion joints are mainly damaged due to the deterioration of the pavement. In particular, unlike the roads, the bridge piers penetrate the pavement layer with water and brine, And the deterioration of the package is accelerated to threaten the safety of the bridge.

In this aged concrete pavement, the upper part of the road is cut and repaired with overlay pavement by using road repair material that uses cement or crude steel cement and polymer at the speed of spalling, cracking and repairing of portholes. However, There is a problem that at least 5 hours is required to open the traffic even if it is impossible to work in the winter season and urgent. In the case of a road repair material using a polyurethane resin, durability is low, such as a decrease in adhesion with a concrete bonding interface and a resistance to ultraviolet rays, and thus it is difficult to apply to a road.

On the other hand, thermosetting resins and thermoplastic resins are widely used as repair materials for old road repairing materials, and thermoplastic resins are used to melt the binders by heating and adhere to the road surface. As a result, A large number of equipments are required for maintenance. Epoxy-based, polyester-based, and acrylic emulsion-based resins are widely used as such thermosetting resins. Therefore, the binder of the epoxy system is vulnerable to ultraviolet rays, and there is a disadvantage of discoloration after application, and the polyester system may cause disconnection of aggregate due to deterioration of adhesion due to shrinkage and cracking due to strong hardness, and acrylic emulsion has mechanical properties The adhesive and durability due to the deterioration is inferior, and the non-slip pavement has a disadvantage of having one purpose of slip prevention.

As a conventional method, anti-skid agent on pavement has been proposed in Japanese Patent No. 10-0171675. The pavement method using methyl methacrylate (MMA) resin, which is widely applied to asphalt concrete and cement concrete road, is excellent in acid resistance, alkali basicity and salt water resistance, and can work in sub-zero weather conditions. And it is also useful as an emergency repair agent since mechanical strength can be manifested. However, in the case of a repair material using conventional methyl methacrylate (MMA) resin, it takes a long time to work because the work process is required even if the adhesive strength to the concrete surface is weak. In order to overcome this problem, when a monomer having a low glass transition temperature (Tg) is used, the cohesive force is weakened and further time is required until complete curing, and the problem that the mechanical strength is not expressed by the unreacted monomer is pointed out . Particularly, in the case of the packing section of the bridge, cracks may occur due to deterioration due to penetration of moisture and salt water into the concrete. Since the Tg range of a typical methyl methacrylate (MMA) resin is -20 to 70, rapid durability may be accompanied in the summer when the concrete surface temperature exceeds 70. In addition, unsaturated polyester, epoxy acrylate, urethane acrylate, and the like are sometimes added, which causes yellowing upon exposure to ultraviolet rays, which promotes aging.

On the other hand, the repair of cement concrete packing materials that are aged due to cracking and spalling is fundamentally important for injecting the filler into the cracks, but most of the prior patents disclose that the use of methyl methacrylate (MMA) In addition, in the case of Japanese Patent Laid-Open Publication No. 10-2015-0049034, the viscosity of methyl methacrylate (MMA) resin is emphasized to emphasize the injectability to complement the problems of conventional methyl methacrylate (MMA) 10-100 cps. However, it is still in the limit of the method of applying to the upper part of the concrete as a repair material including methyl methacrylate (MMA) resin, coarse aggregate, sand, steel slag and curing agent.

Although a variety of technologies have been proposed, new road maintenance methods are needed due to crack repair problems caused by existing concrete and LMC repair and packaging sites. There is no road crack repair material that can be installed at room temperature in all seasons, easily penetrates cracks, maintains the durability of concrete roads, and is easy to repair, economical, and shortens traffic interruption.

Korean Patent No. 10-0171675 Korean Patent Publication No. 10-2015-0049034

The present invention was developed to solve the problems of the above-mentioned conventional road repair material and construction method, and it is an object of the present invention to provide a concrete road crack repairing and repairing material which is excellent in injecting property at cracks, Reinforcing the crack part and preventing slipping of the surface The concrete is excellent in adhesion with aggregate and has excellent durability against ultraviolet ray. It has the characteristics of long-time repairing material, and also can reduce the traffic control time by quick workability. And an object of the present invention is to provide an injection repair material, a manufacturing method thereof, and a construction method.

In order to accomplish the above object, the present invention provides a method for manufacturing a concrete cracking infusion and repairing material, comprising the steps of: heating methyl methacrylate (MMA) monomer to 50 ° C to 90 ° C and adding benzoyl peroxide (BPO) The mixture was stirred for 30 minutes. Then, a coupling agent, a styrene-butadiene monomer and wax were added thereto, stirred for 30 minutes to obtain methyl methacrylate (MMA ) Preparing a resinous substrate; And mixing and stirring benzoyl peroxide (BPO) as a curing agent to the methyl methacrylate (MMA) resin subject.

Here, it is preferable that the subject is polymerized by adding 0.2 to 2 parts by weight of benzoyl peroxide (BPO) to 100 parts by weight of methyl methacrylate (MMA) monomer.

The polymerization inhibitor is preferably added in an amount of 0.1 part by weight based on 100 parts by weight of the monomer.

In the production of the methyl methacrylate (MMA) resin, the coupling agent selected from zirconia, titanate-based coupling agent, and silane-based coupling agent may be used in an amount of 0.1 to 2 parts by weight per 100 parts by weight of the methyl methacrylate (MMA) By weight.

In preparing the methyl methacrylate (MMA) resin, it is preferable that styrene butadiene is added in an amount of 5 to 10 parts by weight based on 100 parts by weight of the methyl methacrylate (MMA) monomer.

When the wax selected from ethylene homopolymer wax, micronized polyethylene wax, dimethiol propane, diallyl ester, or tetrahydro is used as the methyl methacrylate (MMA) monomer 100 To be added in an amount of 0.1 to 0.5 parts by weight with respect to parts by weight.

Further, it is preferable that a non-phthalate plasticizer is further added when benzoyl peroxide (BPO) is added as the curing agent.

Here, the plasticizer and the benzoyl peroxide (BPO) are preferably dispersed at a particle size of 50 micrometers or less and then mixed at a ratio of 4: 6 to 7: 3.

It is preferable that the curing agent benzoyl peroxide (BPO) mixed in the main component of the methyl methacrylate (MMA) resin is mixed in an amount of 2 to 10 parts by weight based on 100 parts by weight of the main component.

Further, 0.01 part by weight of an oxide-based inorganic pigment is preferably added to 100 parts by weight of the methylmethacrylate (MMA) resin.

Meanwhile, the concrete crack infusion and repairing material according to the present invention includes methyl methacrylate (MMA) resin as a subject and benzoyl peroxide (BPO) as a curing agent.

Here, the subject is polymerized by adding 0.2 to 2 parts by weight of benzoyl peroxide (BPO) to 100 parts by weight of methyl methacrylate (MMA) monomer.

 The polymerization inhibitor is preferably added in an amount of 0.1 part by weight based on 100 parts by weight of the monomer.

It is preferable that a coupling agent selected from zirconia, a titanate-based coupling agent, and a silane-based coupling agent is added to the methyl methacrylate (MMA) resin.

It is preferable that styrene butadiene is added to the methyl methacrylate (MMA) resin.

The methyl methacrylate (MMA) resin is preferably added with a wax selected from ethylene homopolymer wax, micronized polyethylene wax, dimethiol propane, diallyl ester, and tetrahydrofuran.

The non-phthalate plasticizer is preferably added to the curing agent.

Here, the plasticizer and the benzoyl peroxide (BPO) are preferably dispersed at a particle size of 50 micrometers or less and then mixed at a ratio of 4: 6 to 7: 3.

The curing agent benzoyl peroxide (BPO), which is mixed with the methyl methacrylate (MMA) resin, is preferably mixed with 2 to 10 parts by weight based on 100 parts by weight of the resin.

It is preferable that 0.01 part by weight of an inorganic pigment is further added to 100 parts by weight of the methyl methacrylate (MMA) resin.

The method for constructing the concrete crack infusion and repairing material according to the present invention comprises the steps of injecting the above-mentioned concrete crack infusion and repair material into the concrete cracks of the road; Applying a remnant concrete crack infusion and repair material on the surface of the road to the road surface using a squeeze; And spraying and curing the sand on the upper surface of the concrete crack infiltration repairing material coated on the road surface portion.

The concrete road cracking infusion repair material, the concrete road crack infusion repair material and the construction method according to the present invention have the following advantages.

First, the resin is polymerized to prevent the concrete from penetrating into the concrete to prevent the water from penetrating into the concrete, and the chloride ion penetration resistance through the accelerated chloride ion permeation test is 1000 Coulomb (KS F 4561) of 67BPN or more and crack penetration depth of 13mm or more in consideration of stability and durability after construction, and the structural strength is improved by improving wear resistance and freezing and thawing resistance.

Second, it can repair cracks in concrete roads in a short period of time regardless of the season, can shorten the opening time of traffic, and is environmentally friendly and economical.

Third, the present invention is not limited to existing overhead LMC repair packages or partial road repair materials, but can be applied to all concrete roads, bridges, overpasses, coastal structures, non-slip pavements, bicycle roads, Parking lots, etc.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a concrete road constructed with concrete road crack infill and repair material according to the present invention,
FIG. 2 is a photograph showing the concrete road crack installation repair material according to the present invention.

Hereinafter, the method of manufacturing a concrete road cracking infusion and repairing material according to the present invention, the concrete roadway cracking infusion and repairing material, and the construction method and operation thereof will be described in detail with reference to the accompanying drawings and preferred embodiments.

The concrete road crack infusion and repairing material according to the present invention is manufactured by blending methyl methacrylate (MMA) resin and benzoyl peroxide (BPO) as a curing agent.

Resins used for high durability and high adhesion in the construction industry are reactive resins and they must be mixed in the field and reacted in a short time to have high mechanical strength, excellent chemical reaction and durability. Examples of such reactive resins include epoxy (EP) resin, methyl methacrylate (MMA) resin, unsaturated polyester (UP) resin and polyurethane (PU) resin. The above reactive resins are produced in a transparent or colored resin form, .

On the other hand, for use as a repair material for cracks, it is most preferable that the injection property is good. The evaluation item is viscosity. That is, the viscosity should be adjusted to the extent desired to be injected into the cracked region. In case of epoxy resin, it is widely used with strong adhesive force, but it is too high in viscosity and is not suitable for yellowing due to outdoor use. Urethane resin has good elasticity such as impact resistance and adhesion, but viscosity is too high. Is inadequate. Unsaturated polyesters are not suitable because they have poor adhesion to concrete.

In the case of methyl methacrylate (MMA) resin, it is easy to control the viscosity during polymerization and it can be manufactured at a very low point. Considering that the reactivity between the epoxy resin and the hardener is more than 98% and that the high quality epoxy does not exceed 70% of the reactivity (the possibility of the epoxy resin reacting with the epoxy resin and the hardener), the epoxy resin or other reactive resin such as polyurethane It has much better reactivity and has homogeneous chemical reaction. It has characteristics such as Rapid Curing, Low-temperature Curing, Easy to rework, Not harmful to health, It is ideal for repairs of injection. Therefore, methyl methacrylate (MMA) resin is used as the reactive resin in the case of the repair agent for crack infiltration according to the present invention.

Meanwhile, benzoyl peroxide (BPO) is used as a curing agent in the case of the repair agent for cracks according to the present invention. The following formula (1) is a polymerization reaction formula of methyl methacrylate (MMA). As can be seen from the formula (1), the methyl methacrylate resin (MMA) has a carbon double bond set (C = C) structure, and when benzoyl peroxide (BPO) is used as a curing agent, And when the reaction starts, the reaction is continued without changing the physical properties at a very low temperature. During the curing process, a long carbon molecular chain (-C-C-C-) is formed. This structure ensures the durability of the product in various environments.

식 (1)

Equation (1)

Hereinafter, a manufacturing method and a construction method of a concrete road crack inflow repairing material according to the present invention will be described.

First, methyl methacrylate (MMA) monomers were polymerized to prepare a subject. The methyl methacrylate (MMA) monomer was heated while the curing agent benzoyl peroxide (BPO) was added and polymerized for 60 minutes. After cooling for a period of time, polymerization inhibitor is added and stirred for 30 minutes. After the primary polymerization reaction is completed in this way, a styrene-butadiene (Styren) resin for imparting ductility to the rigid properties of methyl methacrylate (MMA) and improving adhesion with LMC (Latex Modified Concrete) -Butadien resin, a coupling agent for improving the adhesion of the adhesive interface between concrete and concrete, and a wax for reducing the volatility of the methyl methacrylate (MMA) resin during the curing reaction and improving the reactivity with the curing agent are added and stirred . Since methyl methacrylate (MMA) has a viscosity similar to that of water in the monomer (monomer) state, it is necessary to increase the viscosity and to react with the curing agent homogeneously for use in the field.

Here, the temperature raising temperature range of the methyl methacrylate (MMA) monomer is preferably 50 to 90 ° C. If the heating temperature of the methyl methacrylate (MMA) monomer is less than 50 캜, a homogeneous reaction with benzoyl peroxide (BPO) does not occur, resulting in low viscosity and poor reactivity of the product. When the temperature exceeds 90 캜, It is difficult to obtain the injection property and the possibility of natural curing at a high temperature is increased.

On the other hand, the content ratio of the methyl methacrylate (MMA) monomer and the curing agent benzoyl peroxide (BPO) during polymerization is in the range of 0.2 to 2 parts by weight per 100 parts by weight of the methyl methacrylate (MMA) monomer as the curing agent benzoyl peroxide (BPO) . When the content of benzoyl peroxide (BPO) is less than 0.2 parts by weight, the polymerization reaction of the methyl methacrylate (MMA) monomer is insufficient, which may lead to an uncured phenomenon when the product is used. When the content of the methyl methacrylate (MMA) resin occurs in a cascade, resulting in excessive curing, which is undesirable.

The reason for cooling for 1 hour at 30 DEG C or less in the state where the polymerization is completed is to prevent the polymerization product from being cured when the polymerized product is kept at a high temperature for a long time. In addition, PMMA (Polymethlmethacrylate) formed by polymerization is added with a polymerization inhibitor for storage stability and stirred for 30 minutes.

In order to inject the repair material into the concrete crack, it is necessary to control the viscosity according to the crack width and the depth that can be injected. This viscosity control depends on the heating temperature and the polymerization holding time in the production of the methyl methacrylate (MMA) resin. In the case of the methyl methacrylate (MMA) resin prepared through the heating temperature (50 to 90 ° C) and the polymerization time (60 minutes) as described above, the viscosity is 10 to 25 cps (Brookfield) Is suitable for about 40mm.

On the other hand, in the case of the Ascon road, methyl methacrylate (MMA) resin (MMA) resin prepared by two components of methyl methacrylate (MMA) monomer and benzoyl peroxide (BPO) In the case of cement concrete, the surface of limestone, silica, and alumina is composed of hydration product, sand and gravel produced by water hydration reaction with water. Since the water content is constant and binding water remains, Tension, high hydrophilicity and adhesion performance are required. Epoxy primers can be used to improve adhesion to cement concrete, but this adds to the construction process and increases the construction cost. Thus, the methyl methacrylate (MMA) resin produced when methyl methacrylate (MMA) In addition to the monomers and benzoyl peroxide (BPO) as zirconia, titanate-based coupling agent, a silane coupling agent (3-Glycidoxypropyltrimethoxysilane, C ₉ H ₂ that the coupling is selected from 0O ₅ Si) agent is added is preferred. This coupling agent lowers the surface tension, and the SiO ₂ (silica, silica) It gives excellent adhesion by covalent bonding between Si and O at the interface of sand and gravel. The coupling agent is preferably added in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of the methyl methacrylate (MMA) monomer. When the content of the coupling agent is less than 0.1 part by weight, the effect of improving the adhesion with the large-crest base surface is insignificant. When the content exceeds 2 parts by weight, adhesion force such as progress of gelation with water remaining on the concrete surface may be lowered .

In addition, acrylic emulsion, styrene-butadiene latex, modified acrylic emulsion and modified asphalt emulsion are used in polymer cement concrete method such as LMC and VES-LMC in order to improve the durability of concrete by complementing the brittleness of concrete. The concept that compensates for the cracking and the cracking instability in the general cement concrete without polymer is different. In the case of general cement concrete, the anion and cation charge are mixed with the nonionic system depending on the constituents, and it is effective to use a coupling agent which enhances the electrostatic bonding force between the specific ion and the specific ion. However, There is no effect on the cracked part of the used polymer cement concrete. Styrene Butadiene (Styren Butadiene) was added to the methyl methacrylate (MMA) resin to give an elongation of 5 to 30% to improve the brittleness of the concrete and improve the adhesion when injected into the cracked part of the polymer cement concrete It is preferable to inject it. Exposure to ultraviolet rays of crack repair material is not significantly affected by durability due to sand sprayed in the non-slip treatment process. However, considering homogeneous application of the entire road surface after repairing crack injection, the styrene- Acrylate monomer is added in an amount of 5 to 10 parts by weight based on 100 parts by weight of acrylate (MMA) monomer. When the content of styrene-butadiene is less than 5 parts by weight, it is insufficient to impart softness to the rigid properties of methyl methacrylate (MMA), and when it exceeds 10 parts by weight, it is undesirable because of excessive ductility.

Further, it is preferable to further add a wax selected from ethylene homopolymer wax, micronized polyethylene wax, dimethiol propane, diallyl ester or tetrahydrofuran in the production of methyl methacrylate (MMA) resin . When the wax is added, the volatility of the methyl methacrylate (MMA) resin is reduced during the application, and since the wax layer is coated on the surface, the reaction with the curing agent is initiated in the state where the air is blocked, so that the surface stickiness is not left in the uncured state. The wax is preferably added in an amount of 0.1 to 0.5 parts by weight based on 100 parts by weight of the whole methyl methacrylate (MMA) resin. If the content of the wax is less than 0.1 part by weight, it may be oxidized with oxygen in the air before the curing reaction of the methyl methacrylate (MMA) resin and the curing agent occurs, The residual wax component may remain on the surface to cause contamination or interfere with the adhesive force, which is not preferable.

On the other hand, benzoyl peroxide (BPO) is a substance that has a high risk of ignition when it is exposed to firearms during work, inhalation due to generation of dust during handling, physical contact and explosion and fire. To solve this problem, it is preferable to add a nonphthalate eco-plasticizer to benzoyl peroxide (BPO) used as the hardener. Preferably, the plasticizer and the benzoyl peroxide (BPO) are dispersed at a particle size of not more than 50 micrometers and mixed at a ratio of 4: 6 to 7: 3, respectively, and then introduced into a methyl methacrylate (MMA) monomer. When dispersed and mixed at such a particle size, ease of mixing, ease of washing of the working tool, and stability of use at -10 ° C to 40 ° C are enhanced.

The crack infusion and repair agent according to the present invention may be prepared by mixing a methylmethacrylate (MMA) resin base prepared as described above with a curing agent benzoyl peroxide (BPO) powder or a liquid phase, -time) is adjustable according to the amount of the curing agent benzoyl peroxide (BPO). For example, when 2 parts by weight of the curing agent benzoyl peroxide (BPO) is used per 100 parts by weight of the resin in the range of 0 to 20 占 폚, a pot life of 10 to 15 minutes can be secured. By using 3 parts by weight of a curing agent, it is possible to secure a pot life between 15 and 20 minutes. The curing time can also be adjusted according to the amount of the curing agent benzoyl peroxide (BPO). For example, when 2 parts by weight of the curing agent benzoyl peroxide (BPO) is used per 100 parts by weight of the resin in the range of 0 to 20 ° C, A curing time can be secured and a curing time of 40 to 50 minutes can be secured by using 3 parts by weight of a curing agent per 100 parts by weight of the subject in a range of 20 to 35 ° C.

The methyl methacrylate (MMA) resin-based concrete crack infusion and repairing agent according to the present invention is prepared by mixing 2 to 10 parts by weight of a curing agent benzoyl peroxide (BPO) in 100 parts by weight of a methyl methacrylate (MMA) After stirring for about 1 minute, it is applied to the surface to be applied and it is applied to the cracked part. The remaining amount of the surface portion is applied by squeezing the entire surface of the road, and the sand recommended in the local area is sprayed in the range of 0.4 to 0.8 kg / m 2 to prevent slip and hardened until the road is opened. FIG. 1 is a cross-sectional view of a state in which a repair agent for injecting concrete cracks according to the present invention is installed, and FIG. 2 is a photograph of a construction scene.

On the other hand, when slip prevention work is required after crack injection, wax coated on the first coating film acts as a separator between the second coating film when the second supplementary injection is performed after the first cracking part is injected. It is desirable to make a secondary replenishment before a repair material cures, or to spread the sand and then apply a second coat. At this time, it is preferable that the sand coating is performed when the primary coating film hardens, thereby widening the bonding surface area.

The shear adhesive strength of the crack infusion and repair material according to the present invention is preferably 10.5 Mpa or more and the tensile elongation is 5% or more. It is desirable that the quality standard after construction is 67BPN or more for slip resistance (KS F 4561), 1000Coulombs or less for salt penetration resistance (KS F2711) and 13mm or more for penetration depth of crack repairing material considering stability and durability.

< Example  >

Methyl methacrylate (MMA) resin (subject) was prepared under the same conditions as in Table 1 below, and mixed with different hardener contents to prepare the concrete cracking repair materials of Examples 1 to 3. As a comparative example, 100 parts by weight (100 g) of a bottom packing material (trade name CM Roadcoat) of Sejin Road Co., Ltd., which is a styrene-based acrylic emulsion resin, was mixed with 1 part by weight (1 g) of a hardening agent benzoyl peroxide (BPO) .

division
subject Hardener MMA monomer (g) BPO (g) Polymerization temperature
(° C) Retention time
(minute) Cooling temperature
(° C) Polymerization inhibitor (g) BPO (g)
Example 1

100
0.3
70
50
30
0.1
One
Example 2

100
0.3
70
50
30
0.1
3
Example 3

100
0.3
70
50
30
0.1
5

The repair materials according to Examples 1 to 3 and Comparative Example were applied to concrete cracks in the concrete road, and then a physical property measurement test was performed. The measurement results are shown in Table 2 below. The required amount of repair material for cracking treatment was 2.5 liters / ㎡ in consideration of the difference in the required amount depending on the porosity of the concrete, the size of the bubble, the quantity of the cracks and the like. Followed by further application. Excess cracks on the surface were repaired by squeezing and applied to the entire surface of the road, followed by spraying 0.4 ~ 0.8kg / ㎡ of sand recommended for road construction.

Properties

Target property
Example 1
City 2
Example 3
Comparative Example
exam Viscosity Less than 25 cps (mPa-sec) 10 23 170 360
(Excluding aggregate) Brookfield
KS M ISO 2555 Pot life (21 ℃) Within 60 minutes 150 45 10 12 ASTM D2417 Curing time (21 ° C) Within 5 hours 200 60 15 15 ASTM D 1640 Shear bond strength 10.5 MPa or more 13 50.2 45 50 ASTM C882 Tensile elongation 5% or more 8 6 5 14 ASTM D638 Type I Slip resistance 67BPN or more 35 76 75 79 Salt penetration resistance 1000 Coulombs or less 106 27 55 150 (KS F 2711) Penetration depth 13mm or more (average) 22 20 11 9.3 ASTM D638 Type I

As can be seen from Table 2, it was found that as the amount of the curing agent used increases, the viscosity increased, and the curing time became short and the pot life was shortened. In addition, the tensile elongation of the methyl methacrylate (MMA) resin film after curing was increased (the rigid properties were reduced and softened). As the tensile elongation increases, the adhesion to concrete increases and the shear bond strength increases. In addition, as the viscosity increases, the depth penetrating into cracks becomes smaller.

Sliding resistance, salt (chlorine ion) penetration resistance, penetration depth of methylamine methacrylate (MMA) resin (base) and curing agent were injected into the crack site in Table 2, The depth of crack penetration depth was measured from the surface by taking core (sample) after construction. It is preferable that an oxide inorganic pigment (Fe ₂ O ₃ ) such as black or fluorescent color is further mixed in the crack infusion repairing material according to the present invention so that the infiltration depth can be visually confirmed when the infiltration depth is measured. The pigment is preferably contained in an amount of 0.01 part by weight based on 100 parts by weight of the subject.

In the case of the repair material according to the present invention, the viscosity was lower than that of the repair material according to the comparative example, and thus it was found that the filler according to Example 2 was most suitable for the target physical property range. In the case of the repair material according to the comparative example, it is suitable to repair the road surface area by mixing with the aggregate, but the viscosity of the binder other than sand is high, and it is confirmed that the crack penetration depth does not reach the target value. Considering the repair work of the cracked road, the curing time which affects the pot life and the traffic opening time is appropriate, and the tensile elongation as the repair material of concrete is suitable even though the strength is remarkably high. In particular, in the salt-water penetration test, the water-repellent property of the repairing material according to the present invention was excellent, and it was found that even after the repair work, the road life can be prolonged due to excellent durability while preventing breakage of the road due to salt- have.

Meanwhile, methyl methacrylate (MMA) resin (subject) was prepared by varying the content of the coupling agent as shown in Table 3 below, and the content of the curing agent was fixed to prepare the concrete cracking admixture of Examples 4 to 6 .

division subject(%) Hardener
(g) MMA monomer
(g) BPO
(g) Polymerization temperature
(° C) Retention time
(minute) Cooling temperature
(° C) Polymerization prevention
(G) Coupling agent
(g) Example 4 100 0.3 70 5 30 0.1 0.05 3 Example 5 100 0.3 70 5 30 0.1 One 3 Example 6 100 0.3 70 5 30 0.1 2.5 3

The repairing materials according to Examples 4 to 6 were applied to concrete cracks in the road, and then a physical property test was conducted. The measurement results are shown in Table 4 below. Cracked concrete was applied to the surface of concrete after waiting for 5 minutes until it was fully absorbed and penetrated.

Properties Target property Example 4 Example 5 Example 6 exam Viscosity 25 cps
(mPa-sec) or less 29 22 17 Brookfield
KS M ISO 2555 Housework time (21) Within 60 min 46 45 45 ASTM D2417 Curing time (21 ° C) Within 5 hours 60 60 60 ASTM D 1640 Shear bond strength 10.5 MPa or more 13 50.2 45 ASTM C882 Tensile elongation 5% or more 18 20 22 ASTM D638 Type I

As can be seen from Table 4, the shear bond strength was the largest in Example 5, in which the amount of the coupling agent was 1 part by weight, and when the content of the coupling agent was less than 0.1 parts by weight, And the effect of improving the shear bond strength is not great when the amount is more than 2 parts by weight.

In addition, methyl methacrylate (MMA) resin (subject) was prepared by varying the content of styrene butadiene as shown in Table 5 below, and the content of the curing agent was fixed to prepare the concrete cracking repair materials of Examples 7 to 10 Respectively.

division subject(%) Hardener
(g) MMA monomer
(g) BPO
(g) Polymerization temperature
(° C) Retention time
(minute) Cooling temperature
(° C) Polymerization prevention
(G) Styrene
butadiene
(g) Example 7 100 0.3 70 5 30 0.1 3 3 Example 8 100 0.3 70 5 30 0.1 6 3 Example 9 100 0.3 70 5 30 0.1 9 3 Example 10 100 0.3 70 5 30 0.1 12 3

The repairing materials according to Examples 7 to 10 were applied to concrete cracks in the road, and then a physical property test was performed. The measurement results are shown in Table 6 below. Cracked concrete was applied to the surface of concrete after waiting for 5 minutes until it was fully absorbed and penetrated.

Properties Target property Example 7 Example 8 Example 9 Example 10 exam Viscosity Less than 25 cps (mPa-sec) 22 22 23 22 Brookfield
KS M ISO 2555 Housework time (21) Within 60 min 46 45 45 45 ASTM D2417 Curing time (21 ° C) Within 5 hours 58 60 61 60 ASTM D 1640 Shear bond strength 10.5 MPa or more 15 48 51 33 ASTM C882 Tensile elongation 5% or more 4 15 22 32 ASTM D638 Type I

As can be seen from Table 6, when the content of styrene butadiene is less than 5 parts by weight, the tensile elongation is less than 5%, which can not cope with the shrinkage and expansion behavior of the winter and summer concrete, If the amount is more than 30 parts by weight, the surface contamination and adhesion may be reduced when exposed to a high temperature, and it is preferably 5 to 10 parts by weight as in Examples 8 and 9.

Methyl methacrylate (MMA) resin (subject) was prepared by varying the content of wax as shown in Table 7 below, and the content of the curing agent was fixed to prepare the concrete cracking repair materials of Examples 11 to 13.

division subject(%) Hardener
(g) MMA monomer
(g) BPO
(g) Polymerization temperature
(° C) Retention time
(minute) Cooling temperature
(° C) Polymerization prevention
(G) Wax
(g) Example 11 100 0.3 70 5 30 0.1 0.05 3 Example 12 100 0.3 70 5 30 0.1 0.3 3 Example 13 100 0.3 70 5 30 0.1 0.8 3

The repairing materials according to Examples 11 to 13 were applied to concrete cracks on the road, and then a physical property test was conducted. The measurement results are shown in Table 8 below. Cracked concrete was applied to the surface of concrete after waiting for 5 minutes until it was fully absorbed and penetrated.

Properties Target property Example 11 Example 12 Example 13 exam Viscosity 25 cps
(mPa-sec) or less 18 21 22 Brookfield
KS M ISO 2555 Housework time (21) Within 60 min 50 52 55 ASTM D2417 Curing time (21 ° C) Within 5 hours 130 58 62 ASTM D 1640 Shear bond strength 10.5 MPa or more 11 50 51 ASTM C882 Tensile elongation 5% or more 13 18 21 ASTM D638 Type I

As can be seen from Table 8, when the content of the wax is less than 0.1 parts by weight, the curing time is delayed and the adhesion to the concrete base surface is poor. When the amount exceeds 0.5 parts by weight, the physical properties are favorable, It is not preferable because it acts as a releasing agent to the pre-injection surface during the additional injection operation after the first injection with the wax component, which causes the adhesion to weaken.

Although the present invention has been described in detail with reference to the embodiments of the present invention, the scope of the present invention is not limited thereto, and the scope of the present invention is substantially equivalent to the embodiments of the present invention.

Claims (21)

The polymerization was carried out for 60 minutes by adding benzoyl peroxide (BPO) while the temperature of the methyl methacrylate (MMA) monomer was raised to 50 ° C to 90 ° C. After cooling for 1 hour at a temperature of 30 ° C or lower, Stirring for 30 minutes, adding a coupling agent, a styrene-butadiene monomer and wax, and stirring for 30 minutes to prepare a methyl methacrylate (MMA) resin subject;
And mixing and stirring benzoyl peroxide (BPO) as a curing agent to the methyl methacrylate (MMA) resin main body and stirring the mixture. The method according to claim 1,
Wherein the subject is polymerized by adding 0.2 to 2 parts by weight of benzoyl peroxide (BPO) to 100 parts by weight of methyl methacrylate (MMA) monomer. 3. The method of claim 2,
Wherein the polymerization inhibitor is added in an amount of 0.1 part by weight based on 100 parts by weight of the monomer. The method according to claim 1,
In the production of the methyl methacrylate (MMA) resin, a coupling agent selected from zirconia, titanate-based coupling agents and silane-based coupling agents is added in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of methyl methacrylate (MMA) Wherein the method comprises the steps of: The method according to claim 1,
Wherein the styrene butadiene is added in an amount of 5 to 10 parts by weight based on 100 parts by weight of the methyl methacrylate (MMA) monomer in the production of the methyl methacrylate (MMA) resin. The method according to claim 1,
In the production of the methyl methacrylate (MMA) resin, the wax selected from ethylene homopolymer wax, micronized polyethylene wax, limetimol propane, diallyl ester, or tetrahydro is dissolved in 100 parts by weight of methyl methacrylate (MMA) Wherein the amount of the filler is 0.1 to 0.5 parts by weight based on 100 parts by weight of the total amount of the filler. The method according to claim 1,
Wherein a non-phthalate plasticizer is further added when benzoyl peroxide (BPO) is added as the curing agent. 8. The method of claim 7,
Wherein the plasticizer and the benzoyl peroxide (BPO) are dispersed at a particle size of 50 micrometers or less, and then mixed at a ratio of 4: 6 to 7: 3. The method according to claim 1,
Wherein the curing agent benzoyl peroxide (BPO) to be mixed with the methyl methacrylate (MMA) resin is mixed in an amount of 2 to 10 parts by weight based on 100 parts by weight of the resin. 10. The method of claim 9,
Wherein 0.01 parts by weight of an oxide-based inorganic pigment is further added to 100 parts by weight of the methylmethacrylate (MMA) resin main body. A concrete crack repairing material containing methyl methacrylate (MMA) resin as a subject and benzoyl peroxide (BPO) as a curing agent. 12. The method of claim 11,
The subject of the present invention is a concrete cracking repairing material characterized in that 0.2 to 2 parts by weight of benzoyl peroxide (BPO) is added to 100 parts by weight of methyl methacrylate (MMA) monomer. 13. The method of claim 12,
Wherein the polymerization inhibitor is added in an amount of 0.1 part by weight based on 100 parts by weight of the monomer. 12. The method of claim 11,
Wherein the coupling agent selected from zirconia, titanate coupling agent and silane coupling agent is added to the methyl methacrylate (MMA) resin. 12. The method of claim 11,
Wherein the methyl methacrylate (MMA) resin is added with styrene butadiene. 12. The method of claim 11,
Wherein the methyl methacrylate (MMA) resin is added with a wax selected from ethylene homopolymer wax, micronized polyethylene wax, limetimol propane, diallyl ester, or tetrahydrofuran. 12. The method of claim 11,
Wherein the non-phthalate plasticizer is added to the curing agent. 18. The method of claim 17,
Wherein the plasticizer and the benzoyl peroxide (BPO) are dispersed at a particle size of not more than 50 micrometers and then mixed at a ratio of 4: 6 to 7: 3. 12. The method of claim 11,
Wherein the curing agent benzoyl peroxide (BPO) mixed in the subject of the methyl methacrylate (MMA) resin is mixed in an amount of 2 to 10 parts by weight based on 100 parts by weight of the subject. 12. The method of claim 11,
Wherein 0.01 parts by weight of an inorganic pigment is further added to 100 parts by weight of the methyl methacrylate (MMA) resin. 20. A method for repairing cracks in concrete, comprising the steps of: injecting a concrete crack infusion repair material according to any one of claims 11 to 20 into a concrete crack part of a road;
Applying a remnant concrete crack infusion and repair material on the surface of the road to the road surface using a squeeze;
And spraying and curing the upper layer of the concrete crack infiltration repairing material coated on the road surface portion and curing the concrete infiltration repairing material.

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