JP2006322281A - Pavement improving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pavement improving method capable of quickly and economically improving a pavement, without using a relatively large-scale device. <P>SOLUTION: This pavement improving method has mainly a heating process of heating a pavement layer 1 formed on the surface of a flame retardant base layer 3 and composed of a mixture including a thermoplastic resin by a burner, a separation process of separating the pavement layer 1 heated by the heating process from the surface of the base layer 3, and a repaving process of repaving the pavement layer 1 by applying and hardening the liquid mixture on the surface of the base layer 3 of separating the pavement layer 1. In the method, the thermoplastic resin is further desirably applied by resin mainly composed of a methyl methacrylate monomer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pavement repair method, and more particularly to a method of repairing a pavement layer in which the surface of a base layer is paved with a resin mixture.

  Conventionally, a pavement method is known in which a pavement layer is created by laying tiles or bricks or applying colored mortar on the surface of a base layer that has been unground with cement concrete or the like. Such pavement methods are widely used in road environments that emphasize landscapes, such as sidewalks, squares, parks, or concourses and platforms of stations.

By the way, in the road environment that places importance on the landscape as described above, in order to ensure the safety of passers-by on the pavement layer, a strong pavement layer that is excellent in durability and weather resistance is required. When a part becomes dirty or damaged, it is required to quickly repair the part. Therefore, the pavement layer and the basement layer (hereinafter simply referred to as “pavement layer etc.”) are peeled off from the construction surface such as the ground by using a dedicated device to shorten the time required for repair work. . More specifically, as shown in Patent Document 1, using a concrete peeling machine including a crushing claw 33 for crushing a pavement layer and the like, and a peeling claw 12 for peeling the crushed pavement layer and the like from the construction surface. A case where the pavement layer and the like are crushed together, peeled off from the construction surface, and the base layer and the pavement layer are re-paved on the exposed construction surface can be exemplified.
JP-A-5-339908

  However, in patent document 1, when crushing a pavement layer, the base layer (paved roadbed) which is the foundation | substrate of a pavement layer is also crushed together, and it peels from the construction surface (ground ground). Therefore, in order to re-pave, it is necessary to start again from the construction of the base layer, and the trouble of such redoing has become an obstacle to shortening the repair time.

  In addition to operating so-called heavy machinery such as the above-mentioned concrete crusher, in addition to requiring specialized technology, the crusher is a special vehicle, so it is expensive to purchase and maintain, As a result, there is a problem that the cost required for re-paving increases. In addition, in the pavement renovation method as described above, it is relatively difficult to crush and peel only a part of the pavement layer (only the part that needs refurbishment, etc.), and it must be a major renovation work. This also contributed to an increase in the cost required for pavement renovation.

  Then, in view of said actual condition, this invention makes it a subject to provide the pavement repair method which can repair a pavement rapidly and economically, without using a comparatively large apparatus.

  The pavement refurbishing method according to the present invention includes a heating step of heating a pavement layer made of a mixture containing a thermoplastic resin formed on the surface of a flame-retardant base layer with a burner, and heating by the heating step. The pavement layer is peeled from the surface of the base layer, and the surface of the base layer from which the pavement layer has been peeled is coated and cured by applying a liquid mixture and re-paving the pavement layer. And a re-paving process ”.

  Here, “flame retardant” means that it has a relatively incombustible property, and for example, even if heat is applied for 5 minutes or more, it causes deformation, melting, destruction or other damage that hinders structural strength. Examples that do not exist. The term “thermoplastic resin” refers to a resin that softens when heated and can be deformed by applying an external force, such as polyethylene, polyvinyl chloride, polyacrylate, methyl methacrylate monomer polymer, and Polyvinyl acetate is mentioned. Further, the “mixture” may be anything as long as a thermoplastic resin is blended, and examples thereof include a resin mortar containing the resin as a binder, or a paint. “Burner” refers to a device that heats an object by moving a nozzle to a predetermined position by an operator and emitting a flame from the tip of the nozzle, such as a gas burner, a gas torch, a flame radiator, etc. Can be illustrated. In addition, the “peeling” means is not particularly limited, but in the present invention, a means that does not require a special skill for operation, for example, a means that uses a known tool such as a scissors or a scraper. Show.

  Therefore, according to the pavement repairing method of the present invention, a heating step of applying heat with a burner to a desired pavement layer having a portion to be repaired is provided. Here, since the pavement layer is composed of a mixture containing a thermoplastic resin, it can be quickly softened by heat and peeled relatively easily without requiring a large force in the subsequent peeling step. In addition, the flame-retardant base layer, that is, the base layer such as general-purpose asphalt concrete or cement concrete is not deformed by the heating process. Only the pavement layer formed on the surface can be easily peeled off without peeling off the base layer. That is, it becomes possible to repair the pavement by re-paving only the pavement layer (re-paving step).

  Further, according to the pavement repairing method of the present invention, a relatively small apparatus such as a gas burner can be applied in the heating process in addition to not requiring a large apparatus in the peeling process. Therefore, no special expertise is required for operation and maintenance of the apparatus, and a more economical pavement repair method can be realized.

  Furthermore, the pavement repairing method according to the present invention may be "the thermoplastic resin is a resin having a methyl methacrylate monomer as a main component" in addition to the above configuration.

  Therefore, according to the pavement modification method of the present invention, a resin (hereinafter simply referred to as “MMA resin”) containing a methyl methacrylate monomer as a main component is applied to the pavement layer. As a result, the pavement layer softens quickly in the heating process and can be easily peeled off in the peeling process, and after the liquid MMA resin is applied to the pavement in the re-paving process, the resin quickly cures at room temperature. Therefore, construction time can be shortened. Therefore, the working time from the heating process to the completion of the re-paving process can be further shortened, and the remarkable effect of being able to provide a more rapid pavement repair method can be achieved.

  Further, in the pavement repairing method of the present invention, it can be further assumed that “a joint pattern is formed on the surface of the pavement layer”.

  Here, the “joint pattern” may be a grid pattern or a geometric pattern, and may be a part of the surface or the entire surface as long as it is formed on the surface of the pavement layer. May be. Therefore, according to the pavement renovation method of the present invention, uneven portions corresponding to various patterns are formed on the surface of the pavement layer, thereby forming a joint pattern. As a result, the surface area of the pavement layer is larger than when the surface of the pavement has a flat shape without joint patterns, and heat is radiated to the recesses so that heat is quickly transferred to the interior of the pavement layer. Therefore, the pavement layer softens very quickly and can be easily peeled off, which is effective.

  Thus, according to the pavement repairing method of the present invention, since the heating step of heating the pavement layer made of the thermoplastic resin mixture with a burner or the like is provided, a relatively large peeling device is used. The pavement layer can be repaired quickly and economically. Moreover, in the peeling process of this invention, only the pavement layer formed in the surface is peeled, without crushing a base layer. For this reason, not only is it possible to reuse the existing basement layer, it is economical, but it is possible to provide a pavement repair method with a very short construction time by reducing the time required for re-working the basement layer.

  Hereinafter, a pavement repair method according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a pavement layer re-paved by the pavement repair method of the present invention, FIG. 2 is a schematic cross-sectional view schematically showing a cross-section of the pavement layer, and FIG. FIG. 4 is an enlarged sectional view, FIG. 4 is an explanatory view showing a heating step, FIG. 5 is an explanatory view showing a peeling step, and FIG. 6 is an explanatory view showing a re-paving step.

  As shown in FIGS. 1 and 2, the pavement repair method according to the present embodiment repairs the pavement layer 1 for paving the surface of the base layer 3 formed on the construction surface 2 such as the ground. Specifically, as shown in FIG. 2, 1 includes a base layer 4, a joint layer 5, a surface layer material 6, and a protective film 7. Here, the base layer 3 refers to a layer that becomes the base of the pavement layer 1 and is made of a flame retardant material such as known asphalt concrete or cement concrete. The “resin mortar” constituting the underlayer 4, joint layer 5, surface layer material 6, and protective layer 7 described later corresponds to the “mixture” of the present invention.

  The underlayer 4 is to smooth the surface by filling the unevenness on the base layer 3, and a resin mortar using a resin as a binder is applied. More specifically, it is obtained by mainly blending an aggregate having a particle size of 5 mm or less with a thermoplastic resin (hereinafter simply referred to as “MMA resin”) mainly composed of a methyl methacrylate monomer as a binder. Resin mortar is applied, and is superior in mechanical strength, water resistance, abrasion resistance, electrical insulation, chemical resistance, and the like, compared to general cement mortar using water as a binder. Note that the MMA resin has characteristics such as excellent fast-curing property and low-temperature curability and little change with time after curing. Here, the resin mortar binder used for the underlayer 4 is not limited to the above as long as it is a thermoplastic resin, and examples thereof include unsaturated polyester, epoxy, furan, and polyurethane. The aggregate is not particularly limited as long as the particle size is 5 mm or less, for example, powdered selben, quartzite, calcium carbonate, titanium, cryolite, perlite, vermiculite, styrene resin foam, clay, Examples include kaolin, talc, and barium carbonate.

  The joint layer 5 corresponds to a layer that expresses the color of the joint portion 8 (described later), and similarly to the base layer 4, a resin mortar using a thermoplastic resin as a binder is applied. As the aggregate and the binder compounded in the joint layer 5, those exemplified for the base layer 4 can be applied, and a pigment for expressing the color of the joint part 8 is blended.

  The surface layer material 6 is a layer mainly constituting the surface layer portion of the pavement layer 1, and the same resin mortar as that of the base layer 4 and the joint layer 5 is applied. Moreover, in this example, the surface layer material 6 has a plurality of tile pattern portions 10 formed by the joint portions 8, and more specifically, is formed in a plurality of vertical joints 8a and in a direction substantially orthogonal to the vertical joints 8a. The joint portion 8 formed by the horizontal joint 8 b is provided, and a grid-like joint pattern is formed by the plurality of tile pattern portions 10. Here, “a grid-like joint pattern” corresponds to the “joint pattern” of the present invention. In addition, the surface layer material 6 of this example further includes a wax having a function of blocking oxygen in the air by forming a film on the surface of the surface layer material 6 and protecting the MMA resin from being hindered. It is blended. The wax is not particularly limited, and examples thereof include higher fatty acids such as paraffin wax, polyethylene wax, stearic acid, and hydroxystearic acid. Further, the surface layer material 6 is further added with a curing agent (benzoyl peroxide or the like) for inducing a curing reaction of the MMA resin or a curing accelerator (amine-based curing accelerator or the like).

  The protective film 7 is a layer that covers the surface H and the joint portion 8 of the surface layer material 6, and for example, a known skin-based resin whose main component is an acrylic resin emulsion can be exemplified. In this example, the protective film 7 having permeability is particularly applied, and a high-quality texture with depth is imparted to the surface of the surface layer material 6.

  On the other hand, in the pavement method of the present invention, a joint formwork member 9 as shown in FIGS. 3 and 6 is used as a method of forming the joint portion 8. The joint form frame member 9 includes a vertical joint member 9a for forming the vertical joint 8a, and a horizontal joint member 9b that is disposed substantially perpendicular to the vertical joint member 9a to form the horizontal joint 8b. (See FIG. 6). Specifically, as shown in FIG. 3, the joint mold member 9 includes a release tape 11, an adhesive layer 12, a foam layer 13, and a protective tape 14. The release tape 11 prevents dust and the like from adhering to the adhesive layer 12 and decreases the adhesive force, and is a sheet-like substance having a softness that does not hinder cutting, bending, and peeling operations. The material is not particularly limited. The pressure-sensitive adhesive layer 12 is for attaching and fixing the foam layer 13 to the joint layer 5, and is formed on the back side of the foam layer 13. As a material, a known adhesive means such as a rubber adhesive or an acrylic adhesive such as an acrylic ester is applied.

  The foam layer 13 is a member that has a large number of voids K inside, is attached to the joint layer 5 via the adhesive layer 12, and divides the surface layer material 6. The material may be any material as long as it has a large number of voids K, and examples thereof include a foaming polyurethane resin, a foaming polyethylene resin, and glass wool. The protective tape 14 prevents the surface layer material 6 and the like from penetrating into the gap K from the surface layer side (the side on which the protective tape 14 is attached) of the foam layer 13 and fixing. It is formed on the surface layer side. As the material, for example, a relatively thin material having a low moisture permeability such as a polyethylene resin, a polypropylene resin, or polyethylene terephthalate is applied.

  The release tape 11, the adhesive layer 12, the foam layer 13, and the protective tape 14 have substantially the same surface shape. The joint form member 9 is a band-like object having a thickness of about 2 mm and a width of about 10 mm, and a suitable length (for example, about several tens of meters) is wound in a ring shape to the construction site. , Cut into a predetermined length, and stuck on the joint layer 5 to function as the vertical joint member 9a and the horizontal joint member 9b (details will be described later).

  Then, the pavement repair method of this invention is demonstrated. The pavement repair method of the present invention can be broadly divided into three steps, that is, a “heating step”, a “peeling step”, and a “re-paving step”.

  First, in the “heating step”, as shown in FIG. 4, fire is applied by a burner 15 to the tile pattern portion 10 to which scratches and dirt K have adhered. In addition, in this example, what repairs the repair site | part W shown to a dashed-dotted line part is illustrated. More specifically, the nozzle of the burner 15 is directed toward the substantially central part of the repaired part W, and fire is radiated to the tile pattern part 10 to which scratches and dirt K are attached. At this time, considering that heat is not applied as much as possible to the vicinity of the outer periphery of the repaired part W, the possibility that the tile pattern part 10 other than the repaired part W is damaged or softened is reduced, and the repaired part is minimized. Can be effective. The burner 15 is not particularly limited as long as heat can be applied to a predetermined position. Examples of the burner 15 include a gas burner, a gas torch, and a flame radiator. In this example, a gas burner is used. Applicable. In this way, by heating the substantially central portion of the repaired portion W, the pavement layer 1 constituting the tile pattern portion 10, that is, the base layer 4, the joint layer 5, the surface layer material 6, and the protective film 7 is blended. The MMA resin exhibits fluidity and softens (softening site N).

  Next, in the “peeling step”, as shown in FIG. 5A, the softened portion N is peeled off from the base layer 3 by the scraper 16. Specifically, the iron part 16a of the scraper 16 is pressed against the softened portion N, and peeled off from the base layer 3 so as to be scraped off. The configuration of the scraper 16 is not limited to that illustrated in FIG. 5, and may be any configuration as long as the softened portion N can be peeled off from the base layer 3. The use of the scraper 16 is convenient because the apparatus can be reduced in size and simplified, and specialized knowledge and skill are not required for operation. Further, in this step, as shown in FIG. 5 (b), the surface layer material 6 (hereinafter simply referred to as “residual portion 17”) located around the softened portion N in the repaired portion W is removed by the scraper 16. Peel from the base layer 3. More specifically, along the joint 8 (vertical joint 8a and horizontal joint 8b) located on the outer periphery of the repaired portion W, the tip of the iron part 16a is collided to form a protective film constituting the joint 8 7. Damage to the joint layer 5 and the base layer 4. And the iron part 16a is applied to the end surface part T side of the tile pattern part 10 which removed the softening site | part N, and the residual part 17 is peeled off from the base layer 3. FIG. At this time, the residual portion 17 is heated by the fire heat of the burner 15 transmitted from the softened portion N, and is slightly softened compared to the tile pattern portion 10 other than the repaired portion W. Further, since the impact is applied to the joint portion 8 by the scraper 16 and damage such as cracks occurs in the foundation layer 4 and the like constituting the joint portion 8, the residual portion 17 is based on the joint portion 8 as a boundary portion. Peel off from the top of layer 3. Therefore, the repaired portion W can be easily peeled off from the base layer 3 without requiring a relatively large force.

  Next, in the “re-paving step”, the pavement layer 1 of the repaired part W peeled off in the “peeling step” is re-paved to create a new tile pattern portion 10. Specifically, first, in order to remove dust, dirt, dust and the like on the base layer 3 of the repaired part W and prevent scattering of paint, the periphery of the repaired part W is covered with a vinyl sheet (so-called “curing” "do). And MMA resin and an aggregate are mix | blended and a resin mortar is created, and it apply | coats on the base layer 3 of the repair site | part W. FIG. Thereby, the fine unevenness which exists on the said base layer 3 is made up, and the base layer 4 which has a smooth surface shape is formed. In addition, it does not specifically limit as a method of apply | coating resin mortar on the base layer 3, For example, well-known tools, such as a roller, a brush, and a wrinkle, are used.

  Subsequently, the joint layer 5 is formed on the surface of the base layer 4. That is, a resin, an aggregate, and a pigment, which are binders, are blended to create a colored resin mortar, which is uniformly applied to the surface of the base layer 4. At this time, it is more preferable to perform leveling (leveling the surface to be constructed) using a known surveying instrument, laser marking device, or the like. The joint layer 5 is a layer that can be seen from the gaps between the plurality of tile pattern portions 10 in a state where the pavement layer 1 is looked down, and it is desirable that the joint layer 5 is colored in contrast to the color of the surface layer material 6. Of course, it is possible to use a natural color as it is without blending a pigment. Then, as shown in FIG. 6A, a position for forming a predetermined joint pattern is set on the surface of the joint layer 5 using a known surveying instrument or laser marking device. More specifically, a thin and strong thread stored in a spinning wheel is dipped in ink, and the thread is placed on the joint pattern along the above-described position. In this state, when the thread is played with the tip of the toe, the ink that has adhered to the joint layer 5 due to the collision of the thread falls, and a draft 18 of a predetermined joint pattern is completed.

  Then, the joint form frame member 9 is arranged on the joint layer 5 along the draft 18. Specifically, the joint form frame member 9 is arranged in a predetermined direction (hereinafter, referred to as a vertical direction) in the grid-like joint pattern indicated by the draft 18 to constitute the joint form frame member 9. The release tape 11 attached to the foam layer 13 is peeled off, and the adhesive layer 12 is pressed onto the draft 18 and attached onto the joint layer 5. And it cut | disconnects by predetermined length (For example, if the surface area of the repair site | part W is 5 m x 3 m, it will be about 5 m etc.). Thus, the vertical joint member 9a is formed. Subsequently, among the grid-like joint pattern shown in the draft 18, the joint mold member 9 is arranged in a direction orthogonal to the vertical direction (hereinafter referred to as the horizontal direction), and the release tape 11 is peeled off in the same manner. The adhesive layer 12 is stuck on the joint layer 5 and cut at a predetermined length (about 3 m in the above example). In this way, the horizontal joint member 9b is formed. At this time, the horizontal joint member 9b uses a cutter or the like to cut out a portion that intersects the vertical joint member 9a, and creates a predetermined interval (for example, a 300 mm square tile pattern portion 3) between the adjacent vertical joint members 9a. If it is cut out to 300 mm), a gap is less likely to be formed at the intersection between the vertical joint member 9a and the horizontal joint member 9b, which is more preferable. In this manner, a grid pattern frame shape is arranged on the joint layer 5 by the vertical joint member 9a and the horizontal joint member 9b. In addition, the order of the process of peeling the peeling tape 11 from the joint mold member 9 and the process of cutting to a predetermined length and taking out the vertical joint member 9a or the horizontal joint member 9b is not limited to this. It may be a simultaneous progress.

  Subsequently, MMA resin, wax, and aggregate are blended to create an MMA resin mortar that becomes the surface layer material 6 constituting the new tile pattern portion 10. The blending ratio of these constituent materials is not particularly limited. For example, when the ground temperature is 10 ° C., a blending ratio such as 5 kg of MMA resin and approximately 10 kg of aggregate can be used.

  Then, the prepared MMA resin mortar is applied onto the joint layer 5 and filled in a rectangular area 19 (see FIG. 6A) divided by the vertical joint member 9a and the horizontal joint member 9b. To go. Further, the surface of the filled MMA resin mortar is flattened with a scissors or the like, and leveled so as to have the same height as the thickness of the vertical joint member 9a and the horizontal joint member 9b. In this way, a surface layer material 6 (see FIG. 2; the same applies hereinafter) having the tile pattern portion 10 is formed. Here, since the surface layer material 6 is blended with wax, a wax having a relatively low specific gravity as compared with the resin floats near the surface of the surface layer material 6 to form a film. For this reason, the inside of the surface layer material 6 is shielded from atmospheric oxygen, the polymerization reaction of the MMA resin is not inhibited, and the curing proceeds rapidly.

  And it waits until the surface H (refer FIG. 2 and the same below) of the surface layer material 6 dries. In order to shorten the construction time, the surface H may be dried using a known drying means such as a dryer. However, the surface layer material 6 of the present embodiment is blended with MMA resin as a binder. A curing accelerator that accelerates the curing of the MMA resin is added. Further, since the wax film is formed, the curing reaction proceeds relatively quickly without using any special means.

  When the surface H is dried, the vertical joint member 9 a and the horizontal joint member 9 b are peeled off from the joint layer 5. More specifically, as shown in FIG. 6 (b), first, the ends of the plurality of vertical joint members 9 a are pulled upward and peeled off from the joint layer 5. Then, the horizontal joint member 9b is peeled off from the joint layer 5 by the same procedure. Here, a large number of voids K exist inside the foam layer 13 (see FIG. 3). Further, since the wax blended in the surface layer material 6 has a relatively low specific gravity, it mainly floats to the vicinity of the surface H of the surface layer material 6, and a contact portion (joint portion) between the foam layer 13 and the surface layer material 6. 8) It is difficult to form a film in the vicinity. For this reason, the gap K and the surface layer material 6 are in direct contact with each other without passing through the wax film, the polymerization reaction of the MMA resin is inhibited by the oxygen in the gap K, and the surface layer material 6 located at the joint portion 8 is cured. It is difficult to do. Therefore, even when the surface H is sufficiently cured, the end surface portion of the surface material 6 positioned at the joint portion 8 is relatively soft, and therefore, the vertical joint member 9a and the horizontal joint member 9b can be smoothly peeled off.

  Next, the protective film 7 is applied to the surface H and joints 8 (see FIG. 2) of the surface layer material 6. The protective film 7 is applied using an appropriate tool such as a roller, a brush, a scissors, or a spray gun. Thus, a new pavement layer 1 having a plurality of tile pattern portions 10 as shown in FIG. 1 is re-paved, and the repair of the pavement layer 1 is completed.

  As described above, according to the pavement repair method of the present example, by providing the heating step of heating the pavement layer 1 in which MMA resin is blended as a binder with a burner, a large-scale apparatus is not required. The desired pavement layer 1 can be peeled relatively easily and quickly. Moreover, according to the heating process of this example, since the MMA resin has a property of softening rapidly by heat, the base layer 3 is not damaged without damaging the base layer 3 made of known cement concrete or asphalt concrete. Only the pavement layer 1 formed on the upper surface of 3 can be peeled off. Therefore, not only can the construction time required for the renovation of the pavement be shortened, but the existing basement layer 3 can be reused, so the material costs and labor costs required for construction can be reduced. Is economical. Furthermore, in the re-paving process, the joint form member 9 using the MMA resin mortar with the wax added to the surface layer material 6 and the protective film 7 and having the foamed layer 13 is applied to the repair site W. The applied surface layer material 6 and protective film 7 are dried very quickly. Therefore, it contributes to further shortening the construction time, which is preferable.

  In addition, according to the pavement repair method of this example, the surface area of the pavement layer 1 is larger than that in the case where the surface of the pavement layer 1 has a flat shape without a joint pattern because the pavement layer 1 has a grid pattern. Is big. Further, since the heat of the burner 15 is quickly transferred to the inside of the pavement layer 1 through the joint portion 8, the pavement layer 1 softens very quickly and can be easily peeled off from the base layer 3. Furthermore, according to this example, since the repaired part W is re-paved using the rod-shaped joint form member 9, the construction surface 2 is compared with the case where a dedicated form member prepared in advance in a factory or the like is applied. It is possible to respond flexibly to design changes at the construction site, such as increasing or decreasing the shape or repaired part W, which is effective. Further, according to this example, since the pavement layer 1 has a shape in which a plurality of tile pattern portions 10 are aligned, that is, a grid-like joint pattern is formed, only a part of the pavement layer 1 is repaired. In addition, it is easy to set the boundary part between the repaired part W and the non-modified part in the joint part 8 (that is, it is not necessary to distinguish the repaired part W and the non-modified part on the surface H), and the boundary This is preferable because the portion can be made inconspicuous.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  In the said embodiment, although what mix | blended MMA resin, a wax, and an aggregate was illustrated in the surface layer material 6, it is not limited to this, It is good also as a structure which does not mix | blend a wax. In addition to the above-mentioned blending, a known thixotropic agent may be blended. According to this configuration, in the state where the surface layer material 6 is applied and the surface H is separated from the joint mold member 9 after being dried, the surface layer material 6 is unlikely to sag and retains the shape of the tile pattern portion 10 relatively stably. . Therefore, it is possible to quickly shift to the operation of applying the protective film, which is preferable.

  In the above embodiment, the pavement layer 1 is exemplified as including the base layer 4, the joint layer 5, the surface layer material 6, and the protective film 7, but is not limited thereto. For example, a colored base layer 4 may be applied and the joint layer 5 may not be provided. In this configuration, the natural texture of the MMA resin mortar is applied to the joint portion 8 using the non-colored base layer 4. It is good also as a structure to express. Further, the surface layer material 6 may have a two-layer structure of a base surface layer material and a surface surface layer material, and may further include a base surface material having moisture permeability or flexibility. Furthermore, although it is naturally possible to have a configuration without the protective film 7, it is preferable to have at least the surface layer material 6 because it can add high designability and durability to the pavement layer 1. .

  Moreover, in the said embodiment, although the pavement layer 1 illustrated what comprises the checkerboard-like tile pattern part 10, it is not limited to this, A potato joint-like joint pattern, a geometric pattern, etc. The pavement layer 1 may have an appropriate joint pattern, or may have a smooth surface shape without the joint pattern. Furthermore, it is possible to add various colors and textures to the surface layer material 6 by blending the surface layer material 6 with natural stones such as mica, metal pieces, or pigments.

  Moreover, in the said embodiment, although the structure which repairs only the repair site | part W in which a part was divided | segmented among the pavement layers 1 was illustrated, it is naturally also possible to repair the whole surface of the pavement layers 1. Furthermore, in the re-paving process, the one using the joint formwork member 9 is exemplified, but in short, what is re-paved by applying the liquid surface layer material 6 to the repaired portion W and curing the surface layer material 6. Anything can be used.

  Moreover, in the said embodiment, although the case where the pavement layer 1 to which the damage | wound and dirt K adhered was repaired was illustrated, it is not limited to this. For example, in order to change the design of the pavement layer 1, the present invention can be applied to a case where a part of the tile pattern portion 10 is peeled off and re-paved. Specifically, various pigments or aggregates are blended into the surface layer material 6, and the color of the surface layer material 6 is changed for each adjacent tile pattern portion 10, thereby enabling checkered patterns, check patterns, stripes, characters. Or a case where a new pattern such as a wall picture is expressed on the pavement layer 1 can be considered. According to the pavement repair method of this example, a part (or all) of the pavement layer 1 can be repaired by a relatively simple method, so that it is possible to quickly cope with such a design change.

It is a perspective view which shows the pavement layer re-paved by the pavement repair method of this invention. It is a cross-sectional schematic diagram which represented the cross section of the pavement layer typically. It is an expanded sectional view of a joint formwork member. It is explanatory drawing which shows a heating process. It is explanatory drawing which shows a peeling process. It is explanatory drawing which shows a repaving process.

Explanation of symbols

1 Pavement layer 3 Basement layer 15 Burner

Claims (3)

A heating step in which a pavement layer made of a mixture containing a thermoplastic resin formed on the surface of the flame-retardant base layer is heated with a burner;
A peeling step of peeling the pavement layer heated by the heating step from the surface of the base layer;
And a re-paving step of re-paving the pavement layer by applying and curing a liquid mixture on the surface of the base layer from which the pavement layer has been peeled off. The pavement repair method according to claim 1, wherein the thermoplastic resin is a resin mainly composed of a methyl methacrylate monomer. The pavement repair method according to claim 1 or 2, wherein a joint pattern is formed on a surface of the pavement layer.

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