JP5438735B2 - Pavement repair method, pavement repair material, and repair material manufacturing method - Google Patents

Description

  The present invention relates to a pavement repair method, a pavement repair material, and a repair material manufacturing method.

  Conventionally, it has been known that cracks occur in pavements such as roads due to degradation of pavement materials due to traffic loads and environmental loads. If this crack (crack) is left as it is, rainwater or the like enters the pavement from the crack, causing the pavement to peel off, leading to a decrease in the support capacity of the pavement.

  Therefore, in order to prevent the intrusion of rainwater, etc. from cracks, a sealing material injection method has been devised in which cracks are filled with a sealing material to repair them, and many materials and construction methods for sealing materials have been developed and put to practical use. Has reached.

  For example, Non-Patent Document 1 discloses a technique for injecting a liquid sealing material, which is obtained by adding a thermoplastic elastomer or the like into asphalt and heating and dissolving it, into a crack using a kettle or the like. In this technology, it is difficult to adjust the injection amount of the sealing material to an appropriate amount, but if the injection amount of the sealing material is insufficient, the sealing performance is impaired. We work on leveling the surface of the material with a metal iron.

“Toa Road Industry Co., Ltd.”, [online], search July 8, 2011, Internet <URL: http://www.toadoro.co.jp/business/product/31/>

  However, in the above-described prior art, since the surface of the raised sealing material is leveled, a part of the sealing material adheres to the surface of the pavement, so that a step is generated between the sealing member and other portions. . As a result, a vehicle traveling on the pavement is easily brought into direct contact with the sealing material, which causes a problem that the sealing material peels off and scatters relatively early after the repair.

  In addition, in the above-described conventional technology, it is necessary to add a material obtained by adding a thermoplastic elastomer or the like to asphalt in a melting pot or the like, and to heat up to a high temperature or to level the surface of the raised sealing material For this reason, there is a problem that a great deal of labor is required for the repair work.

The present invention was created from such a viewpoint, and it is an object of the present invention to provide a simple pavement repair method that can ensure a long-term stable sealing performance and improve work efficiency during repair work. To do.
It is another object of the present invention to provide a repair material used in the repair method for the pavement and a method for manufacturing the repair material.

  In order to solve the above-mentioned problems, the present invention is a repair method for a pavement for repairing a crack generated in the pavement, wherein the asphalt is attached to the string-like member, and the asphalt is attached. A filling step of filling the string-like member into the crack and a heating step of heating the string-like member filled in the crack are characterized.

According to the present invention, by cutting the string-like member perpendicular to the length direction according to the length of the crack, and adjusting the amount of asphalt attached to the string-like member according to the width of the crack, A string-like member suitable for the shape (state) of the crack can be produced. And by filling the string-like member into the crack, the crack can be reliably sealed, while the adhesion of the string-like member to the surface of the pavement can be suppressed, so that it becomes difficult for the vehicle or the like to directly contact the string-like member. The string-like member becomes difficult to peel off.
Also, by heating the filled string-like member, the asphalt attached to the string-like member melts and adheres (bonds) to the pavement, so that cracks can be reliably sealed, while the string-like member peels off within the crack. It becomes difficult to do.
Therefore, according to the present invention, since the string-like member is peeled off and hardly scattered, a long-term stable sealing property can be secured.

Further, according to the present invention, the repair work is completed simply by filling the cracked string-like member with cracks and heating it with a heating means such as a burner. It is possible to omit the heating operation until
Furthermore, according to the present invention, the length and thickness of the string-like member can be easily adjusted to produce the string-like member suitable for the shape of the crack, so that the string-like member can be raised from the surface of the pavement. The work of leveling the surface of the string-like member can be omitted.
Therefore, according to the present invention, work efficiency at the time of repair work is improved as compared with the conventional technique (the technique of Non-Patent Document 1).

  Further, a reinforcing material attaching step of attaching a reinforcing material to the asphalt attached to the string-like member is further provided, and the asphalt and the reinforcing material are alternately attached twice or more to the string-like member. It is preferable that the thickness of the string-like member is adjusted.

  According to such a configuration, the string-shaped member that adjusts the thickness of the string-shaped member by attaching the asphalt and the reinforcing material to the string-shaped member alternately twice or more, and adapts the width of the crack. Easy to produce.

  Moreover, it is preferable to comprise so that the thickness of the said string-like member may be adjusted by changing the temperature of the said asphalt in the said asphalt adhesion process.

  When the temperature of the asphalt is high, the viscosity of the asphalt decreases, so the amount of asphalt attached to the string-like member decreases. On the other hand, when the temperature of the asphalt is low, the viscosity of the asphalt increases. As a result, the amount of asphalt attached to the surface of the asphalt increases, and according to such a configuration, it is possible to adjust the amount of asphalt attached by changing the temperature of the asphalt in the asphalt attaching step, and thus the thickness of the repair material. Thus, a string-like member suitable for the width of the crack can be easily produced.

  In order to solve the above-mentioned problems, the present invention is a repair material for a pavement for repairing a crack generated in the pavement, and includes a string-like member and an asphalt attached to the string-like member. It is characterized by that.

  According to the present invention, as described above, the amount of asphalt attached to the string-like member is cut in a direction perpendicular to the length direction according to the length of the crack and attached to the string-like member according to the width of the crack. By adjusting, a repair material suitable for the shape (state) of the crack can be produced. By filling the repair material into the crack, the crack can be reliably sealed, while the adhesion of the repair material to the surface of the pavement can be suppressed, making it difficult for the vehicle or the like to come into direct contact with the repair material. Becomes difficult to peel. Therefore, according to the present invention, it is possible to ensure a long-term stable sealing performance.

  In addition, according to the present invention, it is possible to easily adjust the length and thickness of the string-like member to produce a repair material suitable for the shape of the crack, so that the repair material does not rise above the surface of the pavement, Work to level the surface of the repair material can be omitted. Therefore, according to the present invention, work efficiency at the time of repair work is improved as compared with the conventional technique (the technique of Non-Patent Document 1).

  In order to solve the above-mentioned problem, the present invention is a method for manufacturing a repair material for repairing a crack generated in a pavement, and includes an asphalt attachment step of attaching asphalt to a string-like member. Features.

  According to the present invention, the repair material can be easily manufactured by attaching asphalt to the string-like member.

According to the present invention, it is possible to provide a simple pavement repairing method that can ensure a long-term stable sealing property and improve work efficiency during repair work.
Moreover, the repair material used for the repair method of the said pavement body, and the manufacturing method of the said repair material can be provided.

(A) is a schematic perspective view which shows a mode when the repair material which concerns on embodiment of this invention is filled into a crack, (b) is sectional drawing which shows the state with which the repair material was filled into the crack. It is explanatory drawing which shows the process of manufacturing a repair material, (a) is a perspective view which shows the cutting process which cut | disconnects a string-like member, (b) is a perspective view which shows the special asphalt attachment process to which special asphalt is made to adhere, (C) is a perspective view which shows the stone powder adhesion process to which stone powder is made to adhere. It is explanatory drawing which shows the process of repairing a crack, (a) is sectional drawing which shows the cleaning process which cleans a crack, (b) is sectional drawing which shows the drying process which dries a crack, (c) is repair. Sectional drawing which shows the filling process which fills a material with a crack, (d) is sectional drawing which shows the heating process which heats the filled repair material. It is sectional drawing which shows the other method of repairing a crack.

DESCRIPTION OF EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
In addition, although this embodiment demonstrates the case where the repair material of the pavement of this invention is applied to the crack which generate | occur | produced on the road, the intended purpose of use of a repair material is not limited.

FIG. 1A is a schematic perspective view showing a state in which the cracking C is filled with the repair material 1 according to the embodiment of the present invention, and FIG. 1B shows a state in which the cracking C is filled with the repair material 1. It is sectional drawing shown. In addition, in FIG.1 (b), the adhesion state of the special asphalt 12 and the stone powder 13 with respect to the string-like member 11 is drawn typically for convenience of explanation.
As shown in FIGS. 1 (a) and 1 (b), the repair material 1 is filled in linear cracks C generated on the road R which is an existing asphalt pavement, so as to prevent intrusion of rainwater or the like from the cracks C. It is a sealing material.
As shown in FIG. 1B, the repair material 1 includes a string-like member 11, a special asphalt 12, and stone powder 13.

  The string-like member 11 is constituted by, for example, a long cotton twisted string having a circular shape in cross section. If the string-like member 11 can be deformed according to the shape of the crack C, can be cut to an arbitrary length, and the special asphalt 12 can be adhered (impregnated), The shape, material, etc. are not particularly limited. Since the thickness of the string-like member 11 can be increased by appropriately adjusting the adhesion amounts of the special asphalt 12 and the stone powder 13 as will be described later, for example, it is preferable to use one having a thickness of about 1 mm.

  The special asphalt 12 as an asphalt is a material attached to the string-like member 11. As the special asphalt 12 of the present embodiment, it is preferable to use a material having high deformation followability (stress relaxation property), for example, a material having the properties shown in Table 1 below.

  As shown in Table 1, the special asphalt 12 of the present embodiment has a high penetration value and is relatively soft and elastic. Therefore, the road R (particularly cracked C) due to repeated traffic loads, temperature changes, etc. It is possible to deform following the deformation (distortion) of the portion. Therefore, the damage of the repair material 1 can be suppressed, and the recurrence and propagation of the crack C can be suppressed.

  Moreover, as shown in Table 1, the special asphalt 12 of the present embodiment has a high softening point and a high viscosity at 60 ° C., and has excellent flow resistance (high-temperature properties), while a low value of the Frath embrittlement point. It shows excellent resistance to low-temperature cracking (low-temperature properties). Therefore, since durability at high temperature and low temperature is high, damage to the repair material 1 can be suppressed even when the temperature changes, and the recurrence and propagation of the crack C can be suppressed.

  The special asphalt 12 is not limited to those having the above-mentioned properties, and may be changed as appropriate in consideration of traffic conditions, environmental conditions, and the like at the repair location. Further, ordinary asphalt may be used in place of the special asphalt 12.

  The stone powder 13 as a reinforcing material is a material attached to the special asphalt 12, and can be appropriately selected from known stone powders. The stone powder 13 increases the strength (durability) of the repair material 1 and, for example, the repair materials 1 and 1 or the repair material 1 and other objects adhere to each other before use (before repair) during storage or transportation. It plays a role to prevent. Thereby, the storage work of the repair material 1, a conveyance work, etc. become easy.

  In this embodiment, the stone powder 13 is used as the reinforcing material. However, the present invention is not limited to this, and for example, synthetic fiber, plant fiber, carbon fiber, rubber powder, mica powder, clay, talc, fly Ash, carbon black, artificial aggregate or the like may be used. These materials may be used alone or in combination of two or more. Furthermore, you may use what mixed sand etc. with a particle size larger than powder (powder) into powder.

The repair material 1 according to the embodiment of the present invention is basically configured as described above. Next, a method for manufacturing the repair material 1 according to the present embodiment will be described with reference to FIG. To do.
2 is an explanatory view showing a process of manufacturing the repair material 1, (a) is a perspective view showing a cutting process of cutting the string-like member 11, and (b) is a special asphalt 12 attached. The perspective view which shows a special asphalt adhesion process, (c) is a perspective view which shows the stone powder adhesion process to which the stone powder 13 is adhered.

  The manufacturing method of the repair material 1 of this embodiment is provided with a cutting process, a special asphalt adhesion process, and a stone powder adhesion process.

<Cutting process>
As shown in FIG. 2A, the length of the string-like member 11 is adjusted by cutting the string-like member 11 at right angles to the length direction by cutting means such as scissors 2 according to the length of the crack C. To do. In this case, as will be described later, since the thickness of the string-like member 11 can be adjusted as appropriate, it is preferable to use a thin string-like member 11 having a thickness of about 1 mm.

<Special asphalt adhesion process>
Subsequently, as shown in FIG. 2B, the special asphalt 12 is attached to the cut string-like member 11. Specifically, the special asphalt 12 is adhered to the string-like member 11 by immersing the string-like member 11 in the liquid special asphalt 12 contained in the container 3 (specifically, the string-like member 11 is impregnated to the inside). ). At this time, the special asphalt 12 is melted and attached to the string-like member 11 by heating the container 3 with a heating means (not shown).

<Stone powder adhesion process>
Subsequently, as shown in FIG. 2 (c), stone powder 13 is adhered to the special asphalt 12. Specifically, the stone powder 13 is attached to the special asphalt 12 by putting the string-like member 11 to which the special asphalt 12 is attached into the container 4 containing the stone powder 13.

  In addition, after the said stone powder adhesion process, when the thickness of the repair material 1 is smaller than the width | variety of the crack C, the operation | work which makes the special asphalt 12 and the stone powder 13 adhere alternately according to the width of the crack C is twice or more. You may repeat. Thereby, the thickness of the repair material 1 can be increased arbitrarily and quickly, and it can be adapted to the width of the crack C.

  By the way, when the inventor of the present application conducted an experiment in which a string-like member 11 having a thickness of 2 mm was prepared and the adhesion work of the special asphalt 12 and the stone powder 13 was alternately repeated three times, the first adhesion work was performed. It was confirmed that the thickness of the string-like member 11 was 4 mm, the thickness of the string-like member 11 was 7 mm in the second attaching operation, and the thickness of the string-like member 11 was 13 mm in the third attaching operation.

Next, with reference to FIG. 3, the method of repairing the crack C which generate | occur | produced on the road R using the repair material 1 which concerns on this embodiment is demonstrated.
FIG. 3 is an explanatory view showing a process of repairing the crack C, (a) is a cross-sectional view showing a cleaning process for cleaning the crack C, and (b) shows a drying process for drying the crack C. Cross-sectional view, (c) is a cross-sectional view showing a filling process for filling the repair material 1 into the crack C, and (d) is a cross-sectional view showing a heating process for heating the filled repair material 1.

  The repair method using the repair material 1 of the present embodiment includes a cleaning process, a drying process, a filling process, and a heating process.

<Cleaning process>
As shown in FIG. 3A, the crack C is cleaned. Specifically, compressed air is blown into the cracks C using an air compressor 5 or the like, and sediments 6 such as earth and sand and dust accumulated in the cracks C are removed.

<Drying process>
Subsequently, as shown in FIG. 3B, the crack C is dried. Specifically, the inside of the crack C and its periphery are dried using heating means such as the burner 7. In addition, when the road R is in a dry state, the drying step may be omitted.

<Filling process>
Subsequently, as shown in FIG. 3C, the repair material 1 produced by attaching the special asphalt 12 and the stone powder 13 to the string-like member 11 is filled in the crack C. Specifically, the repair material 1 is deformed so as to follow the shape of the crack C in the length direction, and is manually pushed into the crack C (see FIG. 1A).

<Heating process>
Subsequently, as shown in FIG. 3D, the repair material 1 filled in the crack C is heated. Specifically, the repair material 1 is heated using a heating means such as a burner 7. At this time, the special asphalt 12 is melted and mixed with the stone powder 13, and the mixture M is filled up to the gap between the side surface of the crack C and the string-like member 11, and adheres to the road R in the crack C. If it cools naturally in this state, the mixture M will harden | cure and will couple | bond with the road R integrally, and repair work will be completed.
The string-like member 11 may be left in the crack C after the repair, or may be removed from the crack C after the filling process and before the mixture M is cured.

According to the present embodiment described above, the special asphalt that cuts the string-like member 11 at right angles to the length direction according to the length of the crack C and adheres to the string-like member 11 according to the width of the crack C. The repair material 1 suitable for the shape (state) of the crack C can be produced by adjusting the adhesion amount of 12 and the stone powder 13. And by filling the crack C with the repair material 1, the crack C can be reliably sealed, while the adhesion of the repair material 1 to the surface of the road R can be suppressed, so vehicles (for example, ordinary cars, snow plows, etc.) ) Becomes difficult to directly contact the repair material 1, and the repair material 1 is difficult to peel off.
Further, by heating the filled repair material 1, the special asphalt 12 of the repair material 1 melts and adheres (bonds) to the road R, so that the crack C can be reliably sealed, while the repair material 1 in the crack C Becomes difficult to peel.
Therefore, according to this embodiment, since the repair material 1 peels off and becomes difficult to scatter, it is possible to ensure a stable sealing performance for a long period of time.

  According to this embodiment, since the special asphalt 12 is relatively soft and elastic, it can be deformed following the deformation of the road R caused by repeatedly applied traffic loads or the like. Therefore, damage to the repair material 1 can be suppressed, and the recurrence and propagation of the crack C can be suppressed, so that a long-term stable sealing property can be further ensured.

According to this embodiment, the repair work 1 prepared by attaching the special asphalt 12 and the stone powder 13 to the string-like member 11 is filled in the crack C and heated by heating means such as the burner 7. Complete. In other words, since the repair material 1 is soft even in a cold state and can be filled in the crack C even in a cold state, the crack filler is put in a melting pot and heated to a higher temperature than in the prior art (for example, the technique of Non-Patent Document 1). Heating work can be omitted, and repair work becomes easy.
Moreover, according to this embodiment, since the length and thickness of the repair material 1 can be adjusted easily and the repair material 1 suitable for the shape of the crack C can be produced, the repair material 1 rises from the surface of the road R. This eliminates the need for leveling the surface of the repair material 1.
Therefore, according to this embodiment, the work efficiency at the time of repair work improves compared with the prior art.

According to this embodiment, since the string-like member 11 is deformable and the special asphalt 12 has soft elasticity, the repair work for the so-called hair crack, which is a very narrow crack, is easily and reliably performed. be able to.
Further, since the string-like member 11 is deformable and the special asphalt 12 has soft elasticity, the crack C having a shape bent in a complicated manner in the length direction or the crack C having a shape having a different width along the length direction. However, the repair material 1 can follow and be deformed, and can be reliably sealed.
That is, since the repair material 1 of this embodiment has a softness | flexibility (flexibility), it can respond to the crack C of various shapes, and can seal it reliably.

  According to this embodiment, even if the depth of the crack C is deep, the repair material 1 has the string-like member 11, so that it is difficult to fall down to the bottom side of the crack C.

  According to the present embodiment, even if the depth of the crack C is deep, the repair material 1 is made of the crack C by adjusting the thickness of the repair material 1 according to the width of the upper side of the crack C. Since it becomes easy to be latched on the upper side, it is more difficult to drop down to the bottom side of the crack C.

  According to the present embodiment, the special asphalt 12 and the stone powder 13 are alternately attached twice or more to the string-like member 11 to adjust the thickness of the repair material 1 and conform to the width of the crack C. The repaired material 1 can be easily produced.

  According to this embodiment, even if the string-like member 11 is left in the crack C, there is an advantage that the string-like member 11 does not become an obstacle when the road R is recycled.

  As mentioned above, although preferred embodiment was described about this invention, this invention is not limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention.

  Although this embodiment demonstrated the case where the repair material 1 of this invention was applied to the crack C which generate | occur | produced on the road R, this invention is not limited to this, For example, a parking lot, an airfield, a container yard, It can be applied to places where cracks may occur such as plazas, station platforms, sidewalks, promenades, and asphalt pavement of dam impervious walls. Moreover, you may apply to the crack which generate | occur | produced in the concrete pavement.

  Moreover, in this embodiment, although the repair material 1 of this invention was used in order to repair the linear crack C, this invention is not limited to this, The planar (tortoise-like) crack C is used. It may be used to repair. In this case, it is preferable to use a plurality of repair materials 1 and 1. Moreover, the repair materials 1 and 1 can connect the repair materials 1 and 1 without gap by melt | dissolving and bonding each other's special asphalt 12 and 12 with heating means, such as the burner 7. FIG. Therefore, rainwater or the like does not enter the crack C from between the adjacent repair materials 1 and 1, and sealing performance can be ensured.

  In addition, as shown in FIG. 4, when the depth of the crack C is deep, a plurality of (at least two) repair materials 1 and 1 are filled up and down to repair the crack C. May be. In this case, it is preferable to heat by heating means such as the burner 7 every time one repair material 1 is filled in the crack C. If it does in this way, repair material 1 can be spread to the bottom of crack C.

  Further, the repair material 1 may be unevenly formed so as to be partially thickened or thinned, or repair is performed using a plurality of repair materials 1, 1 divided for a single crack C. May be performed.

  In the present embodiment, the thickness of the repair material 1 is adjusted by alternately performing the work of attaching the special asphalt 12 and the stone powder 13 twice or more. However, the present invention is not limited to this, The thickness of the repair material 1 may be adjusted by changing the temperature of the asphalt 12. That is, when the temperature of the special asphalt 12 is high, the viscosity of the special asphalt 12 decreases, so that the amount of the special asphalt 12 adhering to the string-like member 11 decreases, whereas the temperature of the special asphalt 12 is low. Since the viscosity of the special asphalt 12 increases, the amount of the special asphalt 12 that adheres to the string-like member 11 increases. Therefore, by changing the temperature of the special asphalt 12 as appropriate in the special asphalt attachment step, the special asphalt 12 12 can be adjusted, and the thickness of the repair material 1 can be adjusted.

  By the way, when increasing the amount of special asphalt 12 to be adhered, the temperature of the special asphalt 12 is preferably set to, for example, 100 ° C. or more and less than 140 ° C. When reducing the amount of special asphalt 12 to be adhered, For example, the temperature of 12 is preferably set to 140 ° C. or higher and lower than 180 ° C. The repair material 1 is a combination of a method in which the work of attaching the special asphalt 12 and the stone powder 13 is alternately repeated twice or more and a method of adjusting the amount of the special asphalt 12 by changing the temperature of the special asphalt 12. You may adjust the thickness.

  Moreover, in this embodiment, the repair material 1 was provided with the stone powder (reinforcement material) 13, and was provided with the stone powder adhesion process (reinforcement material adhesion process) as a manufacturing method of the repair material 1. However, this invention is limited to this. For example, the thickness of the string-like member 11 is changed, or the amount of adhesion of the special asphalt 12 is increased or decreased by changing the temperature of the special asphalt 12, so that the repair material 1 conforming to the width of the crack C can be obtained. When the thickness can be sufficiently secured, the stone powder 13 may be omitted and the stone powder adhesion step may be omitted. Further, when the stone powder 13 is omitted, it is preferable to manufacture the repair material 1 at the enforcement site (that is, no storage work or transport work is required).

  Further, a release paper (mounting paper) may be provided so as to cover the outermost side of the repair material 1. In this case, the release paper is provided in contact with the special asphalt 12 of the repair material 1. If it does in this way, since it can prevent that the repair materials 1 and 1 or the repair material 1 and other things adhere at the time of storage and conveyance, storage work and conveyance work become easy. Further, after the repair, the surplus portion of the repair material 1 can be reused by being protected with a release paper.

1 Repair material 11 String member 12 Special asphalt (asphalt)
13 Stone powder (reinforcing material)
M mixture R road (pavement)
C crack 2 scissors 3 container 4 container 5 air compressor 6 deposit 7 burner

Claims (5)

A repair method for a pavement for repairing a crack generated in the pavement,
An asphalt attachment process for attaching asphalt to the string member;
A filling step of filling the cracks with the string-like member to which the asphalt is attached;
A heating step of heating the string-like member filled in the crack;
A method for repairing a pavement, characterized by comprising: A reinforcing material attaching step of attaching a reinforcing material to the asphalt attached to the string-like member;
The pavement according to claim 1, wherein the thickness of the string-like member is adjusted by alternately attaching the asphalt and the reinforcing material twice or more to the string-like member. Repair method.   The method for repairing a pavement according to claim 1 or 2, wherein the thickness of the string-like member is adjusted by changing the temperature of the asphalt in the asphalt adhesion step. Pavement repair material for repairing cracks in the pavement,
A string member;
Asphalt attached to the string-like member;
A pavement repair material characterized by comprising A method of manufacturing a repair material for repairing a crack generated in a pavement,
An asphalt attachment process for attaching asphalt to the string member;
A method for manufacturing a repair material, comprising:

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