KR102242707B1 - Micro-Crack Prevention Grooving Method and Micro-Crack Prevention Grooving Apparatus - Google Patents

Abstract

The present invention relates to a micro-crack prevention grooving construction method, and a micro-crack prevention grooving device. More specifically, a micro-crack expansion prevention agent is applied to restrain permeation of moisture after forming a grooving groove, thereby preventing expansion of a micro-crack.

Description

Micro-Crack Prevention Grooving Method and Micro-Crack Prevention Grooving Apparatus}

The present invention relates to a micro-crack-preventing grooving construction method and a micro-crack-preventing grooving device, and more particularly, a micro-crack that prevents the expansion of micro-crack by inhibiting moisture penetration by applying a micro-crack expansion inhibitor after forming a grooving groove. It relates to an anti-grooving construction method and a micro-crack-preventing grooving device.

The anti-skid groove construction method, which is constructed to prevent the vehicle from slipping on the road the vehicle is driving on, is a surface treatment method for road pavement. By forming a three-dimensional groove on the pavement surface of the road to provide the same effect as a tire pattern, It is mainly applied for improvement of prevention and drainage, anti-slip due to increased friction, anti-icing, improvement of driving safety, and noise reduction measures.

The anti-skid groove method is a method of forming grooves of a certain standard on the pavement surface of a road or runway, and is a part of the pavement texturing of various pavement surfaces. According to the definition of the International Grooving & Grinding Association, it can be classified into texturing and grooving according to the width of the unit spacing of the pavement texture. According to this, the case where the unit pattern (groove) width interval is greater than 1/2 inch (12.7 mm) is defined as grooving, and the case less than that is classified as texturing.

Among them, grooving can be classified into longitudinal grooving, which cuts a groove parallel to the driving direction of the vehicle, and transverse grooving, which cuts perpendicular to the driving direction. Lateral grooving is applied for the purpose of deceleration and effect by shortening the braking distance, generating intentional driving noise, and generating vibration. ). In Korea, lateral grooving has been mainly applied to shorten the braking distance, but the longitudinal grooving method, which has excellent effects in inducing driver's gaze and improving visibility, reducing noise, improving driving convenience, and improving driving traction, is used in curved sections. , Inclined section, tunnel section, etc. are being expanded.

Among them, the grooving method can be classified into a water cooling type (wet type) and an air cooling type (dry type) according to the cooling method of the blade forming the groove. The wet method is a method of cooling the blades by introducing cooling water, and the dry method is a cooling method using air flow.

The dry grooving method does not spray water and forces compressed air to be circulated into the enclosed cutting device space. It not only cools the blades through the circulation of air, but also removes dust that leaks to the outside by using an integrated machine that sucks and filters cut dust along with the input air. At this time, the amount of air introduced into the enclosed space and the amount of air sucked through the filtering device can be adjusted to efficiently remove dust leaking to the outside. At this time, the dust can be collected with a cyclone dust collecting device or filtered through a filter device. In such a dry grooving construction method, a unit construction width of 0.5 to 1.0 m can be used depending on the length of the drive shaft on which the blade is mounted.

However, in such grooving, since the hardened road surface is cut, fine cracks occur around the cutting surface. If a curing agent is applied without taking appropriate measures for such microcracks, microcracks may be expanded due to continuous vehicle load. In particular, in Korea, where the daily temperature difference and the average temperature difference by season are extreme, the occurrence of moisture due to the temperature difference and the expansion or damage of microcracks due to freezing and thawing occur frequently. If freezing and thawing are repeated while moisture has penetrated into the crack, the volume of the penetrated moisture may also increase or decrease, and the crack may expand and cause damage to the grooving.

An object of the present invention is to provide a micro-crack-preventing grooving construction method and micro-crack-preventing grooving apparatus that prevents the expansion of micro-cracks by applying a micro-crack-expansion inhibitor after forming a grooving groove to suppress moisture penetration.

In order to solve the above problems, the present invention provides a grooving construction method for preventing microcracks, comprising: cleaning a road surface to be grooved; Forming a grooving groove at a predetermined depth and interval using a cutting blade on a surface of a road to be grooved; Injecting air onto the road surface where the grooved groove is located; Applying a fine crack expansion inhibitor to the road surface where the grooved groove is located; And drying the portion of the road surface to which the microcrack expansion inhibitor is applied by blowing air. Including, the microcracks expansion inhibitor provides a grooving construction method comprising a vegetable oil extract and polystyrene dissolved in the vegetable oil extract.

In the present invention, in the step of applying the microcrack expansion inhibitor, the microcrack expansion inhibitor may be applied at least twice or more at ^{0.1 to 0.5 L/m 2.}

In the present invention, in the step of applying the microcrack expansion inhibitor, the microcrack expansion inhibitor may be applied in a range ranging from 5 to 15 cm left and right from the inside of the grooving groove and the cutting surface by the cutting blade.

In the present invention, the vegetable oil extract may contain fatty acids.

In the present invention, the polystyrene may be contained in a weight ratio of 3 to 25% with respect to the fatty acid.

In the present invention, the fatty acid may include a fatty acid methyl ester having 15 to 25 carbon atoms.

In the present invention, the fatty acid may include a fatty acid alkyl ester having 15 to 25 carbon atoms.

In the present invention, the microcrack expansion inhibitor may further include a plasticizer.

In order to solve the above problems, the present invention provides a grooving device for grooving a road surface to prevent microcracks, comprising: a cleaning device for cleaning a road surface to be grooved; Two or more cutting blades disposed at predetermined intervals to form grooves at predetermined depths and intervals on the surface of the road to be grooved; An air blower for injecting air onto a road surface on which the grooved groove is located; An anti-coating device for applying a fine crack expansion inhibitor to the road surface where the grooved groove is located; And a blower for drying by blowing the part of the road surface to which the microcrack expansion inhibitor is applied. Including, the micro-crack expansion inhibitor provides a grooving device comprising a vegetable oil extract and polystyrene dissolved in the vegetable oil extract.

In the present invention, the vegetable oil extract may contain fatty acids.

According to an embodiment of the present invention, an effect of preventing the expansion of microcracks of the grooving may be exhibited by applying the microcracks expansion inhibitor to the grooving groove.

According to an embodiment of the present invention, the microcrack expansion inhibitor penetrates into the microcrack and remains in a liquid form, thereby exhibiting an effect of inhibiting moisture penetration.

According to an embodiment of the present invention, an eco-friendly microcrack expansion inhibitor based on a vegetable oil extract may be used to exhibit excellent hydrophobic, non-toxic and non-corrosive effects.

According to an embodiment of the present invention, since the microcrack expansion inhibitor does not contain water, it is possible to exhibit the effect of showing a fast curing time.

1 is a diagram schematically showing a state of grooving installed on a road surface.
2 is a diagram schematically showing a change in the size of microcracks according to the grooving construction method according to an embodiment of the present invention.
3 is a diagram schematically showing a process of a conventional grooving construction method.
4 is a diagram schematically showing detailed steps of a grooving construction method according to an embodiment of the present invention.
5 is a diagram schematically showing a process of a grooving construction method according to an embodiment of the present invention.
6 is a view showing a state in which the microcrack expansion inhibitor coating step of the grooving construction method according to an embodiment of the present invention is repeatedly performed.
7 is a diagram schematically illustrating a grooving apparatus according to an embodiment of the present invention.
8 is a view schematically showing a state in which the grooving device according to an embodiment of the present invention applies a microcrack expansion inhibitor.
9 is a view schematically showing a state of grooving formed to confirm the effect of the grooving construction method according to an embodiment of the present invention.
10 is a diagram schematically showing a state of grooving of a control group and an experiment group for confirming the effect of the grooving construction method according to an embodiment of the present invention.
11 is a view showing the size of microcracks according to time in grooving by the grooving construction method according to an embodiment of the present invention.

In the following, various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for illustrative purposes, a number of specific details are disclosed to aid in an overall understanding of one or more aspects. However, it will also be appreciated by those of ordinary skill in the art that this aspect(s) may be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of the one or more aspects. However, these aspects are illustrative and some of the various methods in the principles of the various aspects may be used, and the descriptions described are intended to include all such aspects and their equivalents.

As used herein, “an embodiment,” “example,” “aspect,” “example,” and the like may not be construed as having any aspect or design described as being better or advantageous than other aspects or designs. .

In addition, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise or is not clear from the context, "X employs A or B" is intended to mean one of the natural inclusive substitutions. That is, X uses A; X uses B; Or when X uses both A and B, "X uses A or B" can be applied to either of these cases. In addition, the term “and/or” as used herein should be understood to refer to and include all possible combinations of one or more of the listed related items.

In addition, the terms "comprising" and/or "comprising" mean that the corresponding feature and/or component is present, but excludes the presence or addition of one or more other features, components, and/or groups thereof. It should be understood as not doing.

In addition, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein including technical or scientific terms are generally understood by those of ordinary skill in the art to which the present invention belongs. It has the same meaning as. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning Is not interpreted as.

1 is a diagram schematically showing a state of grooving installed on a road surface.

Referring to Figure 1 (a), it can be seen that the grooving is installed on the road surface. As shown in Fig. 1(a), by installing the longitudinal groove 10 on the road surface 50, it is possible to exhibit effects such as inducing the driver's gaze and improving visibility, reducing noise, improving driving convenience, and improving driving grip. .

Referring to (b) of FIG. 1, an enlarged appearance of the grooving constructed as described above can be confirmed. As shown in (b) of FIG. 1, the grooving is composed of a plurality of grooving grooves 10, and the grooving grooves 10 are formed side by side by being spaced apart by a predetermined interval. Such a grooving groove 10 may be formed by cutting the road surface 50 through a blade or the like.

Referring to (c) of FIG. 1, an enlarged state of the grooving groove 10 can be seen. As described above, since the grooving groove 10 is formed by cutting through a blade or the like, minute cracks may occur at the edge of the groove as shown in FIG. 1(c) during the construction process. If the construction is completed without taking appropriate measures for such microcracks, microcracks may be expanded due to continuous vehicle load, vibration, and moisture penetration. If the size of the microcracks is kept small, separate repairs are not required, but if the size of the microcracks expands and increases, such as the bottom right crack in Fig. 1(c), repairs are required. It is necessary to prevent the expansion of microcracks.

2 is a diagram schematically showing a change in the size of microcracks according to the grooving construction method according to an embodiment of the present invention.

In the grooving construction method according to an embodiment of the present invention, the expansion of microcracks is prevented from the construction stage through the microcracks expansion inhibitor. FIG. 2 shows changes in the width of the microcracks when the expansion of the microcracks is prevented during the initial construction process and when no measures are taken for the microcracks in the initial construction process according to an embodiment of the present invention over time.

In general, concrete structures do not repair cracks when the crack width is less than 0.1 mm, but in the case of concrete roads, it is reasonable to repair micro cracks by the action of direct and continuous loads.

As shown in Fig. 2, in the grooving construction method, microcracks are generated by cutting of the blade. The size of the microcracks occurring at this time may vary depending on the cutting conditions of the blade, but it is preferable to suppress the size of about 0.1 to 0.2mm in consideration of the time required for cutting and further measures.

If measures are not taken at the initial stage of the crack width of the microcracks generated through cutting, the cracks gradually increase over time due to load, vibration, and moisture, and repairs are required.

On the other hand, as in the present invention, when measures are taken through the micro-crack expansion inhibitor immediately after cutting, the crack width can be kept low, so that the grooving performance can be maintained without maintenance for a long time.

3 is a diagram schematically showing a process of a conventional grooving construction method.

Figure 3 schematically shows each step of the conventional grooving construction method. In the conventional grooving construction method, first, cleaning and arranging the road surface 50 as in FIG. 3 (a), and cutting the blade 200 as in FIG. 3 (b) 10) is formed. After that, as shown in FIG. 3 (c), a surface curing agent is applied to form a cured coating layer 60.

4 is a diagram schematically showing detailed steps of a grooving construction method according to an embodiment of the present invention.

Referring to FIG. 4, the grooving construction method for preventing microcracks according to an embodiment of the present invention includes cleaning the road surface 50 to be grooved (S100); Forming a grooving groove 10 at a predetermined depth and interval using a cutting blade on the road surface 50 to be grooved (S200); Injecting air onto the road surface 50 where the grooved groove 10 is located (S300); Applying a micro-crack expansion inhibitor to the road surface 50 where the grooving groove 10 is located (S400); Drying the portion of the road surface 50 to which the microcrack expansion inhibitor is applied by blowing air (S500); Applying a surface hardener to the road surface 50 to be grooved (S600); And heating and drying the portion of the road surface 50 to which the surface hardener is applied (S700). It may include.

In the grooving construction method according to an embodiment of the present invention, a grooving groove 10 is formed on a road surface and a microcrack expansion inhibitor is applied to prevent the microcracks of the grooving groove 10 from being expanded.

In an embodiment of the present invention, first, a step (S100) of cleaning the road surface 50 to be grooved is performed. In the step of cleaning the road surface 50 (S100), foreign matters that may exist on the road surface are removed so that there is no obstacle to the formation of the grooving groove 10. To this end, in an embodiment of the present invention, foreign substances may be removed and cleaned using a brush or air.

Thereafter, a step (S200) of forming the grooving groove 10 at a predetermined depth and interval using a cutting blade on the road surface 50 to be grooved is performed. In order to form the grooving groove 10, a plurality of the cutting blades may be disposed at a predetermined interval to form a plurality of grooving grooves 10 at the same time. In this case, in an embodiment of the present invention, air may be circulated to cool the cutting blade. According to an embodiment of the present invention, the cutting blade may be cooled while collecting the cut dust by injecting air into the cutting blade and suctioning and filtering the air together with the cut dust.

After that, the step (S300) of injecting air to the road surface 50 where the grooved groove 10 is located is performed. In the present invention, after forming the grooving groove 10 through the cutting blade, the cutting dust remaining on the road surface 50 is removed by spraying air, so that the microcrack expansion inhibitor applied thereafter is uniformly applied to the grooving groove 10. It penetrates and can play the role of preventing the expansion of microcracks.

After that, a step (S400) of applying a micro-crack expansion inhibitor to the road surface 50 where the grooving groove 10 is located is performed. The micro-crack expansion inhibitor applied in this way penetrates and remains in the road surface 50 and the grooving groove 10, thereby preventing moisture from penetrating, thereby preventing the expansion of micro-crack.

After that, a step (S500) of drying the part of the road surface 50 to which the microcrack expansion inhibitor is applied by blowing air is performed. This drying step may be performed at room temperature.

Thereafter, a step (S600) of applying a surface hardener to the road surface 50 to be grooved is performed. In the present invention, the micro-crack expansion inhibitor is first applied to penetrate the road surface 50 and then the surface hardener is applied to protect the grooved groove 10.

Thereafter, a step (S700) of heating and drying the portion of the road surface 50 to which the surface hardener is applied is performed. Through this, a coating layer for protecting the road surface 50 and the grooving groove 10 may be formed.

In this case, the step of applying the microcrack expansion inhibitor in an embodiment of the present invention is to perform the application of the microcrack expansion inhibitor in a range ranging from 5 to 15 cm left and right from the inside of the grooving groove and the cutting surface by the cutting blade. can do.

In an embodiment of the present invention, the microcrack expansion inhibitor is a kind of biodiesel, and is made of vegetable oil (soybean oil) excellent in environment-friendly, non-toxic, non-aqueous, and non-corrosive properties as a main material, and a mixture of polystyrene and plasticizer may be used.

In an embodiment of the present invention, the microcrack expansion inhibitor may include a vegetable oil extract and polystyrene dissolved in the vegetable oil extract. The microcrack expansion inhibitor acts as a water-repellent base and remains inside the microcracks, thereby preventing liquid substances such as moisture from penetrating. In this case, the vegetable oil extract may contain fatty acids.

In the present invention, a microcrack expansion inhibitor is prepared based on the vegetable oil extract as described above. Vegetable oil that can be used in the production of biodiesel can be used, such as vegetable oil produced after use in restaurants, or unused oil extracted from vegetables such as beans. Of these, soybean oil is composed of three fatty acid chains linked by glycerol molecules. A fatty acid alkyl ester may be formed by mixing such a vegetable oil with an alcohol and a catalyst to undergo a transesterification process.

In an embodiment of the present invention, an agent for preventing microcracks expansion may be prepared based on a soybean oil extract. Soybean is an example of a renewable resource commonly used in the production of biodiesel. The extracted soybean oil can be used in many fields such as soap, cosmetics, surfactants, lubricants, paints, polishes, solvents, resins, plastics, stabilizers, emulsifiers and pesticides. In particular, soybean oil derivatives are hydrophobic and have the potential to repel water or reduce water flow when used in wood or concrete.

Fatty acid alkyl esters are derivatives of fatty acids of vegetable oils, but after esterification, their chemical composition and structure are different, so they have different properties from the original vegetable oils in terms of solvent capacity, surface tension, and viscosity.

Alkyl esters, especially methyl esters through transesterification with methanol, are produced by mixing and reacting plant triacylglycerides (oil) with methanol and an alkaline catalyst for transesterification. Each molecule of triacylglyceride that reacts requires 3 molecules of methanol, resulting in 3 molecules of methyl ester and 1 molecule of glycerin. To produce soybean oil alkyl esters, soybean oil is mixed with alcohol, usually methanol and a catalyst such as sodium hydroxide.

In an embodiment of the present invention, the fatty acid may include a fatty acid alkyl ester having 15 to 25 carbon atoms. Preferably, in an embodiment of the present invention, the fatty acid may include a fatty acid methyl ester having 15 to 25 carbon atoms.

These fatty acid alkyl esters can function as an excellent solvent for synthetic polymers, unlike vegetable oils, while maintaining properties such as biodegradability and non-toxicity of vegetable oils. Accordingly, the fatty acid alkyl ester may dissolve polystyrene and/or polyvinyl chloride to form a mixed composition exhibiting remarkably different fluid properties. Accordingly, the microcrack expansion inhibitor according to an embodiment of the present invention may exhibit unique properties, including polystyrene. Meanwhile, in an embodiment of the present invention, the microcrack expansion inhibitor may further include a plasticizer.

As described above, the fatty acid alkyl ester has a high solvent capacity, and thus various compounds, particularly polymers, can be mixed to change physical properties. In an embodiment of the present invention, an agent for preventing microcracks expansion may be prepared by mixing polystyrene with the fatty acid alkyl ester (especially fatty acid methyl ester). In order to produce a mixed solution of the fatty acid alkyl ester and polystyrene, the fatty acid alkyl ester is heated and then polystyrene is mixed and dissolved. In this way, when polystyrene is mixed with the fatty acid alkyl ester, it changes the viscosity by disturbing the flow of the fatty acid alkyl ester. In this case, properties such as viscosity can be variously adjusted according to the mixing ratio of the polystyrene.

In an embodiment of the present invention, the polystyrene may be contained in an amount of 3 to 25% by weight based on the fatty acid. In such a weight ratio, the microcrack expansion inhibitor composed of a mixture of fatty acid alkyl ester and polystyrene exhibits appropriate fluid properties, particularly viscosity, so that it is easy to penetrate into microcracks of the grooved groove and high residual performance in the crack.

With such a configuration, the microcrack expansion inhibitor according to an embodiment of the present invention is present in a liquid form for the entire lifetime inside the microcrack. Accordingly, it is possible to protect not only the microcracks but also the microcracks that have remained in the pores around the microcracks in the form of a liquid, by filling the microcracks or the expanded microcracks that additionally occur.

5 is a diagram schematically showing a process of a grooving construction method according to an embodiment of the present invention.

Referring to FIG. 5, a process in which the grooving construction method according to an embodiment of the present invention is performed as described above in FIG. 4 can be confirmed.

In the grooving construction method according to an embodiment of the present invention, first, cleaning and arranging the road surface 50 as in FIG. 5 (a) (S100), and the blade ( The grooving groove 10 is formed through the cutting of 200) (S200). Thereafter, as shown in Fig. 5 (c), air is sprayed to remove dust (S300), and as shown in Fig. 5 (d), a micro-crack expansion inhibitor is applied (S400), and the micro-crack expansion preventing agent (40) Penetrates through the grooved groove 10 of the road surface 50 to remain. Thereafter, as shown in (e) of FIG. 5, it is dried by blowing air (S500). After that, a cured coating layer 60 is formed by applying a surface curing agent as shown in (f) of FIG. 5.

6 is a view showing a state in which the microcrack expansion inhibitor coating step of the grooving construction method according to an embodiment of the present invention is repeatedly performed.

Referring to FIG. 6, in the step of applying the micro-crack expansion inhibitor (S400) in an embodiment of the present invention, the micro-crack expansion inhibitor may be applied at least two times at ^{0.1 to 0.5 L/m 2.}

Referring to FIG. 6, first, a micro-crack inhibitor is first applied (S400a), followed by drying by blowing (S500a), and then secondly applying a micro-cracking inhibitor (S400b), and drying by blowing (S500b). ), it is possible to perform two or more coatings.

In an embodiment of the present invention, as shown in FIG. 6, the step (S400) of applying the microcrack expansion inhibitor may be repeatedly performed two or more times so that the microcrack expansion inhibitor well penetrates and remains on the road surface 50. . In this case, preferably, the microcrack expansion inhibitor may be applied in an amount of ^{0.1 to 0.5 L/m 2 per area, respectively, when applied.} When repeatedly applied with such an applied amount, the micro-crack expansion inhibitor easily penetrates into the road surface 50, and sufficiently remains in the pores of the road surface to prevent the expansion of micro-cracks, thereby suppressing the penetration of moisture. More preferably, the microcrack expansion inhibitor may be applied in an amount of ^{0.25 to 0.5 L/m 2 per area, respectively, when applied.}

7 is a diagram schematically illustrating a grooving apparatus according to an embodiment of the present invention.

Referring to FIG. 7, a micro-crack prevention grooving apparatus 1000 according to an embodiment of the present invention includes: a cleaning apparatus 100 for cleaning a road surface 50 to be grooved; Two or more cutting blades 200 disposed at predetermined intervals to form grooves 10 at predetermined depths and intervals on the road surface 50 to be grooved; An air blower 300 for injecting air onto the road surface 50 where the grooved groove 10 is located; An anti-coating device 400 for applying a micro-crack expansion inhibitor to the road surface 50 where the grooving groove 10 is located; And a blower 500 for drying the portion of the road surface 50 to which the microcrack expansion inhibitor is applied by blowing air. It may include.

As shown in FIG. 7, the micro-crack prevention grooving apparatus 1000 according to an exemplary embodiment of the present invention includes a plurality of components and continuously performs each step of the grooving construction method through the grooving apparatus 1000. You can do it. The installer may continuously form the grooving groove 10 on the road surface 50 while moving the grooving device.

First, the cleaning device 100 may be provided on the front side of the grooving device 1000 to clean the road surface 50.

Thereafter, as the grooving device 1000 moves forward, a grooving groove 10 may be formed on the road surface 50 cleaned by the cleaning device 100 through the cutting blade 200. . In an embodiment of the present invention, the grooving device 1000 includes an air circulation device 810 for introducing air into a space in which the cutting blade 200 forms the grooving groove 10; And an air filtering device 820 for collecting dust by suctioning air in a space in which the cutting blade 200 forms the grooved groove 10. It may further include. In an embodiment of the present invention, the air circulating device 810 cools the cutting blade 200 by introducing air, and the air filtering device 820 generates dust generated by the cutting blade 200. It is possible to prevent contamination in the construction process by inhaling with air to collect dust so that dust does not leak to the outside.

Thereafter, as the grooving device 1000 moves, the air blower 300 injects air into the grooving groove 10 formed by the cutting blade 200. Cutting dust remaining on the road surface 50 is removed by the injection of the air blower 300 as described above.

Thereafter, according to the movement of the grooving device 1000, the prevention coating device 400 applies a micro-crack expansion inhibitor to the periphery of the grooving groove 10 and the grooving groove 10. The applied microcracks expansion inhibitor penetrates into the microcracks generated in the grooved groove 10 and the pores existing in the road surface 50.

Thereafter, the road surface 50 to which the microcrack expansion inhibitor is applied is dried by the blower 500 to prepare for the next process.

Meanwhile, in an embodiment of the present invention, as shown in FIG. 7, the application of the microcracking agent may be performed two or more times, including two or more anti-coating devices 400a and 400b. In the embodiment shown in FIG. 7, after the first anti-coating device 400a on the right is coated with the microcrack expansion inhibitor and dried by the first blower 500a, the second anti-coating device 400b on the left is The micro-crack expansion inhibitor may be applied again, and dried by the second blower 500b.

In the embodiment shown in FIG. 7, a configuration in which the microcrack expansion inhibitor is applied twice by the two anti-coating devices 400 as described above is shown, but in another embodiment of the present invention, three or more anti-coating devices 400 It will be apparent to those skilled in the art that the microcrack expansion inhibitor, including ), can be applied more than three times.

8 is a view schematically showing a state in which the grooving device according to an embodiment of the present invention applies a microcrack expansion inhibitor.

Referring to FIG. 8, it can be seen that the plurality of cutting blades 200 simultaneously form a plurality of grooving grooves 10. In the grooving apparatus 1000 according to an embodiment of the present invention, two or more cutting blades 200 may be disposed at a predetermined interval W. In the embodiment shown in FIG. 8, four grooving grooves 10 may be simultaneously formed by four cutting blades 200.

Thereafter, the prevention coating device 400 is applied to the grooving groove 10 formed as described above with an agent for preventing microcracks expansion. At this time, in an embodiment of the present invention, the microcrack expansion inhibitor is applied _{in a range (w 1} ) ranging from 5 to 15 cm left and right from the inside of the grooving groove 10 and the cutting surface by the cutting blade 200 can do.

Referring to FIG. 8, in an embodiment of the present invention, the prevention coating device 400 may have a spray nozzle 410 at a position corresponding to the position of the grooving groove 10, and the spray nozzle The micro-crack expansion inhibitor may be applied to the inside of the grooving groove 10 and in a predetermined area to the left and right of the grooving groove 10. In more detail, a grooving groove (10a) is formed by the rightmost cutting blade (200a) among the plurality of cutting blades (200), and is located at the most right of the spray nozzles (410) of the prevention coating device (400). The injection nozzle (410a) is aligned with the cutting blade (200a) to form an absorbed region (40a) by applying a micro-crack expansion inhibitor to the groove (10a).

In this way, by applying the micro-crack expansion inhibitor around the grooving groove 10, the micro-crack expansion inhibitor easily penetrates into the micro-crack generated when the grooving groove 10 is formed, and The micro-crack-expansion inhibitor remains in the pores of the road surface 50, so that the micro-crack-expansion inhibitor remains in the micro-crack even after time passes, thereby preventing the penetration of moisture.

Hereinafter, an experiment performed to confirm the effect of preventing micro-crack expansion of the grooving construction method of the present invention using a micro-crack expansion inhibitor will be described.

9 is a view schematically showing a state of grooving formed to confirm the effect of the grooving construction method according to an embodiment of the present invention, and FIG. 10 is a dry grooving construction method according to an embodiment of the present invention It is a diagram schematically showing the state of the grooving of the control group and the experimental group for confirming the effect of.

In order to verify the effects and features of the grooving construction method of the present invention, an actual comparative analysis with the general grooving construction method was performed. The target site was a concrete paved road and was constructed by applying a general dry grooving construction method in November 2019, and was constructed by applying the grooving construction method of the present invention for some sections (1m×2m).

After construction was completed, crack detection and change patterns were periodically visually inspected from November 2019 to April 2020 for the same area (2㎡) created by each construction method. The specifications of the groove formed in the target site are shown in FIG. 9.

For comparative analysis, 3 cracks found in the area where grooving was formed by the general dry grooving construction method and 3 cracks investigated in the area constructed by the grooving construction method of the present invention were selected as samples, and 2 weeks using a crack gauge. Crack detection was performed at intervals. The locations of the cracks selected as samples are shown in FIG. 10. In FIG. 10, R1, R2, and R3 located on the upper side are three cracks found in the area where grooving was formed by a general dry grooving construction method, and N1, N2 and N3 located on the lower side are grooving by the grooving construction method of the present invention. These are the three cracks found in the area that created. A total of six cracks selected as a sample are cracks with a width of less than 0.1mm, which is a level that does not require repair.

11 is a view showing the size of microcracks according to time in grooving by the grooving construction method according to an embodiment of the present invention.

Referring to FIG. 11, the result of performing a total of 12 crack detection for 24 weeks (24W) at intervals of 2 weeks (2W) can be confirmed.

Cracks that were measured to be less than 0.1mm when grooving was completed show a tendency to develop gradually due to the influence of moisture penetration, freezing and thawing in winter, and continuous vehicle load.

In the case of R1 to R3 cracks measured in the general dry grooving construction method section, cracks with a width of 0.1 to 0.15 mm were progressed in the final detection, and in particular, the cracks of R1 and R3 were measured with a crack width of 0.15 mm that required surface repair. .

On the other hand, even though the cracks N1 to N3 in the area constructed by the grooving construction method according to an embodiment of the present invention also gradually cracked, the crack width was measured to be 0.1 mm or less in all of the final inspections, despite the unfavorable winter season for the structure. It was in a good condition that no maintenance was required.

From these results, the grooving construction method according to an embodiment of the present invention not only has the effect of suppressing the spread and development of microcracks that may occur in grooving, but also improves the durability of grooving in the long term, Since it can reduce the maintenance requirements, it can be confirmed that it is an advantageous construction method in terms of constructability and economy compared to general grooving construction methods.

According to an embodiment of the present invention, an effect of preventing the expansion of microcracks of the grooving may be exhibited by applying a microcracks expansion inhibitor to the grooving groove.

According to an embodiment of the present invention, the microcrack expansion inhibitor penetrates into the microcrack and remains in a liquid form, thereby exhibiting an effect of inhibiting moisture penetration.

According to an embodiment of the present invention, by using an eco-friendly microcrack expansion inhibitor based on vegetable oil extract, hydrophobic, non-toxic, and non-corrosive effects may exhibit excellent effects.

According to an embodiment of the present invention, since the microcrack expansion inhibitor does not contain water, it is possible to exhibit the effect of showing a fast curing time.

As described above, although the embodiments have been described by the limited embodiments and drawings, various modifications and variations are possible from the above description to those of ordinary skill in the art. For example, the described techniques are performed in a different order from the described method, and/or components such as systems, structures, devices, circuits, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved. Therefore, other implementations, other embodiments, and those equivalent to the claims also fall within the scope of the claims to be described later.

10: Grooving groove
40: microcrack expansion inhibitor
50: road side
60: hardened coating layer
1000: dry grooving device
100: cleaning device
200: cutting blade
300: air blower
400: prevention drafting device
500: blower
810: air circulation device
820: air filtering device

Claims (10)

As a grooving construction method that prevents microcracks,
Cleaning the road surface to be grooved;
Forming a grooving groove at a predetermined depth and interval using a cutting blade on a surface of a road to be grooved;
Injecting air onto the road surface where the grooved groove is located;
Applying a fine crack expansion inhibitor to the road surface where the grooved groove is located; And
Drying the part of the road surface to which the microcrack expansion inhibitor is applied by blowing air; Including,
The microcrack expansion inhibitor comprises a vegetable oil extract and polystyrene dissolved in the vegetable oil extract,
The vegetable oil extract contains a fatty acid alkyl ester having 15 to 25 carbon atoms, which is produced by mixing soybean oil, alcohol, and a catalyst to undergo a transesterification process,
The polystyrene is contained in a weight ratio of 3 to 25% based on the fatty acid alkyl ester,
The fatty acid alkyl ester is mixed and dissolved in polystyrene after being heated, the grooving construction method.
The method according to claim 1,
In the step of applying the microcrack expansion inhibitor, the microcrack expansion inhibitor is applied at least twice or more at ^{0.1 to 0.5 L/m 2.}
The method according to claim 1,
The step of applying the micro-crack expansion inhibitor comprises applying the micro-crack expansion inhibitor in a range ranging from 5 to 15 cm left and right from the inside of the grooving groove and the cutting surface by the cutting blade.
delete delete The method according to claim 1,
The fatty acid comprises a fatty acid methyl ester having 15 to 25 carbon atoms, grooving construction method.
delete The method according to claim 1,
The micro-crack expansion inhibitor further comprises a plasticizer, grooving construction method.
As a grooving device for road surface grooving construction that prevents microcracks,
A cleaning device for cleaning a road surface to be grooved;
Two or more cutting blades disposed at predetermined intervals to form grooves at predetermined depths and intervals on the surface of the road to be grooved;
An air blower for injecting air onto a road surface on which the grooved groove is located;
An anti-coating device for applying a fine crack expansion inhibitor to the road surface where the grooved groove is located; And
A blower for drying by blowing the part of the road surface to which the microcrack expansion inhibitor is applied; Including,
The microcrack expansion inhibitor comprises a vegetable oil extract and polystyrene dissolved in the vegetable oil extract,
The vegetable oil extract contains a fatty acid alkyl ester having 15 to 25 carbon atoms, which is produced by mixing soybean oil, alcohol, and a catalyst to undergo a transesterification process,
The polystyrene is contained in a weight ratio of 3 to 25% based on the fatty acid alkyl ester,
The fatty acid alkyl ester is mixed and dissolved in polystyrene after being heated.
delete

Images