KR102562855B1 - Boundary stone having adhesion layer of boundary stone for reconstruction at ascon repavement - Google Patents

Abstract

Proposed is a road curbstone having a curb adhesion layer for the reconstruction at an ascon re-paving, which is able to maintain the adhesion to the road curbstone, prevent the neutralization based on concrete, reinforce the surface, prevent corrosion of the concrete, maintain the density for a long time, prevent moisture and air from penetrating, and prevent swelling from vapor pressure. The road curbstone comprises: an emulsion layer located between the foundation and the curb and dispersed in a solution by containing asphalt fine particles, emulsifier, and stabilizer; and a porous ceramic body. The porous ceramic body includes a large number of pores and includes 1-5 wt% of the total weight of the bonding layer.

Description

Boundary stone having adhesion layer of boundary stone for reconstruction at ascon repavement}

The present invention relates to a road boundary stone, and more particularly, to a road boundary stone including a boundary stone bonding layer for sufficient reinforcement and waterproofing when the road boundary stone is reconstructed together with asphalt concrete resurfacing.

In general, a paved road is formed by sequentially stacking a surface layer, a base layer, and a road bed from the top, and the surface layer and the base layer are paved and compacted by heating or mixing asphalt and aggregate or filler at room temperature. The asphalt concrete is a mixture of asphalt and concrete, and includes room temperature asphalt, recycled asphalt, HMA (hot mix asphalt), and the like, in addition to the heated asphalt mixture (KS F 2349 standard). Since paved roads are damaged due to vehicle traffic, climate and environmental changes, repavement is being carried out with partial repair at an appropriate time. Since the life cycle of paved roads varies depending on maintenance, the appropriate time and construction method are selected for resurfacing.

The road boundary stone is divided into a boundary stone that separates the driveway and the sidewalk, and a boundary stone that separates the sidewalk and the complex. The road boundary stone is installed on concrete, which is mainly used as a foundation, as in Korean Patent Registration No. 10-0785311. However, the concrete foundation has structural cracks resulting from poor construction, physical damage, deterioration in performance due to corrosion of reinforcing bars and impact, and non-structural cracks such as plastic shrinkage and settlement, drying shrinkage, freeze-thaw, etc. Cracks (nonstructural cracks) occur. On the other hand, the deterioration factors of the concrete base are deeply related to air permeability, water permeability and absorbency. For example, moisture generated from the concrete base does not evaporate and remains at the bottom of the curbstone. When the corrosion of the concrete base proceeds due to the remaining moisture, the deterioration of the concrete occurs.

The problem to be solved by the present invention is to maintain adhesion with the road boundary stone, prevent neutralization of the concrete base, strengthen the surface, prevent corrosion of the concrete base, and maintain the density for a long period of time to prevent penetration of moisture and air. It is to provide a road boundary stone including a boundary stone bonding layer for re-construction in asphalt concrete resurfacing to prevent swelling due to vapor pressure from occurring.

The road boundary stone including the boundary stone bonding layer for re-construction in the asphalt resurfacing to solve the problem of the present invention includes a boundary stone bonding layer located between the base and the road boundary stone in the asphalt resurfacing. At this time, the boundary stone bonding layer includes an emulsion layer dispersed in a solution including asphalt fine particles, an emulsifier, and a stabilizer, and includes a pottery porous body, and the pottery porous body includes a plurality of pores and contains 1 ~5% by weight.

In the bonding layer of the present invention, the porous pottery body includes porous silicon carbide powder, and the silicon carbide powder may be contained in an amount of 5 to 50% by weight based on the total weight of the porous pottery body. The boundary stone bonding layer may further include 1 to 5% by weight of the potassium titanate porous body including a plurality of pores. The boundary stone bonding layer may include a surface reinforcing agent. The surface reinforcing agent may be an inorganic reinforcing agent including an alkali silicate. The boundary stone bonding layer may include a plate-shaped ceramic forming at least one layer while forming a void (G). The plate-shaped ceramics may be disposed parallel to each other, inclined, or combined with each other.

In an embodiment of the present invention, the boundary stone bonding layer is divided into a lower layer, a porous layer, and an upper layer, the lower layer and the upper layer contain a surface reinforcing agent, and the porous layer is filled in the space provided by the buffer grid. Porous bodies may be included. The boundary stone bonding layer is divided into a lower layer, a porous layer, and an upper layer, the lower layer and the upper layer contain a surface reinforcing agent, and the porous layer fills the space provided by the buffer grid. It may include a porous body. The boundary stone bonding layer is divided into a lower layer, a porous layer, and an upper layer, and the lower layer and the upper layer may include a surface hardening agent and plate-shaped ceramics.

According to the road boundary stone including the boundary stone bonding layer for re-construction in the asphalt resurfacing of the present invention, by mixing a permeable porous body such as a pottery porous body with the boundary stone bonding layer, the adhesion with the road boundary stone is maintained, and the neutralization of the concrete base It prevents and strengthens the surface, prevents corrosion of the concrete base, and maintains density for a long period of time to prevent penetration of moisture and air to prevent swelling due to vapor pressure.

1 is a cross-sectional view for explaining a first bonding layer according to the present invention.
FIG. 2 are photographs showing a potassium titanate porous body applied to the first bonding layer of FIG. 1 .
3 is a cross-sectional view for explaining a second bonding layer according to the present invention.
4 is a cross-sectional view for explaining a third bonding layer according to the present invention.
5 is a cross-sectional view for explaining a fourth bonding layer according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. In the drawings, it is exaggeratedly expressed for convenience of description. Meanwhile, in the drawings, the thicknesses of films (layers, patterns) and regions may be exaggerated for clarity. Further, when it is said that a film (layer, pattern) is on, above, below, or on one side of another film (layer, pattern), it may be directly formed on the other film (layer, pattern) or other films (layer, pattern) may be formed therebetween. A film (layer, pattern) may be interposed.

In the embodiment of the present invention, by mixing an air permeable porous body such as a pottery porous body in the bonding layer of the boundary stone, it maintains adhesion with the road boundary stone, prevents neutralization of the foundation, strengthens the surface, prevents corrosion of the foundation, and maintains compactness for a long period of time. Suggests a curbstone bonding layer that prevents the infiltration of moisture and air by continuously maintaining the swelling phenomenon caused by vapor pressure. To this end, the boundary stone bonding layer to which the air permeable porous material is applied will be studied in detail, and the improvement effect of the bonding layer by the air permeable porous material will be described in detail. The boundary stone bonding layer of the present invention is applied when re-constructing road boundary stones together with asphalt concrete repaving of various paved roads.

1 is a cross-sectional view for explaining a first bonding layer 100 according to an embodiment of the present invention. At this time, the first bonding layer 100 will be examined together with asphalt resurfacing. However, it is not a drawing in a strict sense, and there may be components not shown in the drawing for convenience of description.

According to FIG. 1, the first bonding layer 100 is located between the base 10 and the road curbstone 20. The first bonding layer 100 is referred to as a boundary stone bonding layer. The base 10 is made of concrete, stone, etc. to support the road boundary stone 20, and the base 10 and the road boundary stone 20 are attached by the first bonding layer 100. In general, the base 10 is made of a concrete material and is in contact with the resurfacing asphalt concrete (A). Accordingly, the embodiment of the present invention adopts a case where the base 10 is made of concrete. Resurfacing asphalt (A) is a base layer, an asphalt bonding layer and a surface layer sequentially laminated, and all known methods can be applied. The base layer is above the subgrade, and uniformly transmits the load acting on the surface layer to the subgrade by correcting the surface. The surface layer has appropriate slip resistance and flatness to enable safe and comfortable driving in addition to the role of distributing the load to the lower part. The paved road and foundation 10 including the resurfacing asphalt concrete A are stacked on the subgrade.

The road boundary stone 20 has a boundary stone dividing a driveway and a sidewalk and a boundary stone dividing a sidewalk and a complex, and is manufactured by processing natural stone such as granite or cured by compressing concrete with a press. Recently, the road boundary stone 20 has expanded its functions, such as providing road information, in addition to serving to divide the boundary. Accordingly, the curbstone 20 may be variously modified within the scope of the present invention.

The first bonding layer 100 improves the adhesion between the base 10 of the road pavement and the curbstone 20, and prevents moisture or foreign matter from penetrating into the base 10 to give waterproof characteristics. The first bonding layer 100 improves the strength of the road pavement by improving the binding force between the base 10 and the road curbstone 20. like this. Application of the first bonding layer 100 has a great effect on the life of the road. The first bonding layer 100 includes an emulsion layer 30 in which asphalt fine particles are dispersed in an emulsifier, a stabilizer, etc. 32) may be further included. Any known emulsion layer 30 may be applied without limitation.

The pottery pottery body 31 increases bonding strength with the first bonding layer 100 and improves air permeability and heat insulating properties of the first bonding layer 100 . The pottery porous body 31 is mainly manufactured by firing clay. Clay refers to fine soil particles having a diameter of 0.004 mm or less. When rocks are weathered and decomposed, clay minerals are formed by combining silicon, aluminum, and water. Clay has a much larger surface area per unit weight than sand or silt, so it is the most active part of soil along with humus and has a strong ability to retain moisture and nutrients. The pottery pottery 31 is harmless to the human body, non-toxic, and can be used for a long time. In addition, the porous pottery body 31 maintains excellent environmental resistance in a natural state and is inexpensive to produce. Furthermore, the fine pores generated in the process of manufacturing the pottery porous body 31 retain the function of a natural filter that allows air to pass through and blocks water.

In order to control the apparent density of the pottery porous body 31, silicon carbide (SiC) powder is mixed. The silicon carbide powder exists in a form included in the porous pottery body 31, and in the process of manufacturing the porous pottery body 31, a chemical reaction is caused by atmospheric gas and heat to generate gas. For example, the silicon carbide powder is converted into a porous body while generating an oxygen compound by reacting with oxygen by heat. Here, the oxygen compound may be CO ₂ , and CO ₂ serves to control the apparent density (AD) of Onggi. Apparent density is expressed in units of g/cc and refers to mass per unit volume. The apparent density varies depending on the number of pores included in the pottery porous body 31 and the size of the pores, and the larger the relative volume occupied by the pores, the smaller the apparent density.

The content of the porous pottery body 31 is preferably 1 to 5% by weight with respect to the total weight of the first bonding layer 100 in consideration of the dispersibility, air permeability, and heat insulation of the porous pottery body 31 . If the content of the pottery porous body 31 is less than 1% by weight, the effect of air permeability and heat insulation is reduced, and if the content exceeds 5% by weight, the effect of the first bonding layer 100 is reduced because the components of the emulsion layer 30 are reduced. In addition, the content of the silicon carbide powder in the porous pottery body 31 is 5 to 50% by weight based on the weight of the porous pottery body 31 . When the content of silicon carbide powder, which is a porous body, increases in the porous pottery body 31, the apparent density of the porous pottery body 31 is lowered. As the content of the silicon carbide powder increases, the number of pores relatively increases and the size of the pores also increases. In this way, the silicon carbide powder can adjust the air permeability by adjusting the number and size of the pores of the pottery porous body 31 .

Optionally, the first bonding layer 100 may further include a potassium titanate porous body 32 . The potassium titanate porous body 32 increases the bonding strength of the first bonding layer 100 and improves air permeability and heat insulating properties of the first bonding layer 100 . As shown in FIG. 2, the potassium titanate porous body 32 is obtained by sintering fibers (a) and powder (b), and each has pores (Vg). The porosity of the potassium titanate porous body 32 can be adjusted by a known method. The potassium titanate porous body 32 not only has excellent mechanical performance, but also has unique physicochemical properties due to its own tunnel structure. For example, there are high infrared reflectance, low thermal conductivity, heat insulation, high heat resistance, high abrasion resistance, high electrical insulation and low dielectric constant, chemical stability, and the like.

The content of the potassium titanate porous body 32 is preferably 1 to 5% by weight with respect to the total weight of the first bonding layer 100 in consideration of dispersibility, air permeability, and heat insulating properties of the potassium titanate porous body 32 . If the content of the potassium titanate porous body 32 is less than 1% by weight, the effect of air permeability and heat insulation is reduced, and if it exceeds 5% by weight, the effect of the first bonding layer 100 is reduced because the components of the emulsion layer 30 are reduced.

The pottery porous body 31 and the potassium titanate porous body 32 contain moisture and gradually evaporate it to prevent deterioration due to moisture. In addition, the pores of the pottery porous body 31 and the potassium titanate porous body 32 impart heat insulating properties. The pores connected in the form of a three-dimensional network absorb moisture and air to lower the thermal conductivity of the first bonding layer 100 . The insulating properties of the porous bodies 31 and 32 reduce rapid temperature changes in the first bonding layer 100 and suppress contraction and expansion of the first bonding layer 100 . That is, the porous bodies 31 and 32 contribute to effectively preventing cracks of the first bonding layer 100 by gradually evaporating moisture and suppressing rapid temperature changes.

On the other hand, when the thickness of the first bonding layer 100 is large, solidification of the first bonding layer 100 does not occur properly in some regions, particularly in the center. In this case, since the solidification of the first bonding layer 100 is not uniform throughout, deterioration of the first bonding layer 100 occurs over time and fine gaps are generated. When the gap is formed, moisture and air are absorbed through the gap, and the function of the water retention agent is deteriorated, so that the role of the first bonding layer 100 is not properly performed. Specifically, when moisture penetrates into the first bonding layer 100 after construction, the moisture receives heat from sunlight to become water vapor and does not evaporate and stays in the gap, increasing the vapor pressure. When the vapor pressure increases, a swelling phenomenon that is pushed up by the vapor pressure occurs in the gap.

The porous bodies 31 and 32 are evenly distributed inside the first bonding layer 100, so that the solidification of the first bonding layer 100 occurs uniformly over the entire first bonding layer 100. This is because the uniform distribution of the porous bodies 31 and 32 prevents the liquid first bonding layer 100 from aggregating. The porous bodies 31 and 32 may solve the problem that solidification of the first bonding layer 100 does not occur properly. In addition, since the porous bodies 31 and 32 serve as anchors, the first bonding layer 100 continues to maintain a dense state. If the solidification of the first bonding layer 100 is made uniformly over the entire first bonding layer 100, deterioration of the first bonding layer 100 that may occur over time is blocked to prevent the occurrence of fine gaps. restrain When the gap is suppressed, moisture and air are prevented from being absorbed through the gap so that the role of the first bonding layer 100 is sufficiently performed. In this way, if the solidification of the first bonding layer 100 is uniform as a whole and the density is maintained continuously, absorption of moisture from the outside is prevented, and the vapor pressure generated by moisture being heated by sunlight is fundamentally blocked, thereby reducing swelling. symptoms can be eliminated.

On the other hand, the first bonding layer 100 may include a surface reinforcing agent 33 for reinforcing the surface of the base 10 and the road curbstone 20 in contact. The surface reinforcing agent 33 is preferably an inorganic reinforcing agent containing alkali silicate, and the surface reinforcing agent 33 penetrates into the micropores of the base 10 and the road boundary stone 20, and contains calcium hydroxide and insoluble calcium silicate produced by a hydration reaction. Hydrates are created to fill micropores to increase strength. To this end, it is preferable that the emulsion layer 30 is mixed with a water-soluble resin and an organic binder, and the organic binder improves adhesion between the foundation 10 and the curb stone 20 in particular. Penetrates into the micropores of the base 10 and the road boundary stone 20, and generates calcium hydroxide and insoluble calcium silicate hydrate generated by the cement hydration reaction to fill the micropores and increase strength.

The alkali silicate is made by mixing at least one of potassium silicate and lithium silicate with sodium silicate, SiO ₂ /R ₂ O (where R is K, Li, Na) in a molar ratio of 1.5 to 4.0, and the content of SiO ₂ 10 to 30% by weight of silver is preferable. In addition, the alkali silicate is preferably 5 to 50% by weight based on the total weight of the surface reinforcing agent (33). If the content of the alkali silicate is less than 5% by weight, the concentration of the alkali silicate is too low, and the surface strengthening effect such as prevention of salt damage, neutralization, etc. is poor. If it exceeds 50% by weight, the viscosity becomes too high, making it difficult to penetrate into the base 10 and the road boundary stone 20, the surface strength of the base 10 and the road boundary stone 20 decreases, and the bonding strength with other compositions. this is lowered In addition to the alkali silicate, an inorganic material may be added to the surface hardening agent 33 to improve the surface hardening effect.

The water-soluble resin imparts water resistance, and has excellent permeability to the surface of the base 10 and the road boundary stone 20, thereby filling the voids in the base 10 and the road boundary stone 20 and improving watertightness, so that the base ( 10) and the surface of the curbstone 20 are useful. The water-soluble resin can prevent cracking of the surface reinforcement layer of the foundation 10 and the curb stone 20 caused by the stress, and can alleviate external impact. The water-soluble resin includes a water-soluble acrylic resin, a urethane resin, an epoxy resin, a vinyl resin, and the like. The content of the water-soluble resin is preferably 10 to 30% by weight based on the total weight of the first bonding layer 100. If the content is less than 10% by weight, the effect of strengthening the surface of the base 10 and the road boundary stone 20, such as preventing salt damage, neutralization, etc., is reduced, and if it exceeds 30% by weight, the effect of strengthening the surface by alkali silicate is reduced.

The organic binder enhances the bonding strength between the compositions and can be cured over time, thereby increasing the watertightness inside the base 10 and the road boundary stone 20, and improving mechanical properties such as water resistance, chemical resistance, abrasion resistance, durability and strength . The organic binder includes one selected from the group consisting of an epoxy resin, an acrylic resin, a polydimethylsiloxane resin, a phenol resin, a polyurethane resin, an amino resin, and a polyester resin. The content of the organic binder is preferably 1 to 5% by weight based on the total weight of the first bonding layer 100.

3 is a cross-sectional view for explaining the second bonding layer 200 according to an embodiment of the present invention. In this case, the second bonding layer 200 is the same as the first bonding layer 100 except for the plate-shaped ceramic 40 . Accordingly, a detailed description of the overlapping parts will be omitted.

According to FIG. 3, the second bonding layer 200 bypasses the path of moisture, so that the moisture is more slowly absorbed and evaporated into the porous bodies 31 and 32, thereby preventing cracks in the second bonding layer 200. can be effectively prevented. Inside the second bonding layer 200, plate-shaped ceramics 40, for example, plate-shaped ceramics 40 made of coarse potassium titanate, talc, etc., are stacked in at least two or more layers. case was shown. The layer made of the plate-shaped ceramic 40 is not formed as one layer, but the plate-shaped ceramic 40 forms a layer while forming the gap G. The porous bodies 31 and 32 and the surface hardening agent 33 are dispersed between the plate-shaped ceramics 40.

For the plate-shaped ceramic 40, taking coarse potassium titanate as an example, the average length L is preferably 1 to 10 μm. If it is smaller than 1 μm, it is difficult to form a layer while forming a void (G) because the length is short. If it is larger than 10 μm, it is difficult for the porous bodies 31 and 32 and the surface reinforcing agent 33 to enter the space between the plate-shaped ceramics 40 and fill them properly because the length is long. If the filling of the porous bodies 31 and 32 and the surface reinforcing agent 33 is not properly performed, the degree of moisture control is reduced due to the decrease in the density of the second bonding layer 200 . In the drawings, the plate-shaped ceramics 40 are represented as being stacked in parallel, but in practice, each plate-shaped ceramic 40 may be stacked with the whole or part inclined. When the porous bodies 31 and 32 are filled in the space between the plate-shaped ceramics 40, an inflow path of moisture flowing from the outside of the second bonding layer 200 is blocked or maximally blocked.

4 is a cross-sectional view for explaining a third bonding layer 300 according to an embodiment of the present invention. At this time, the third bonding layer 300 is the same as the first bonding layer 100 except for the buffer grid 51 and the layer structure. For convenience of explanation, the buffer grid 51 is expressed as a plane.

Referring to FIG. 4 , the third bonding layer 300 includes a buffer grid 51 in the form of a matrix. The buffer grid 51 prevents the porous bodies 31 and 32 from being damaged when a load is applied to the pavement. The buffer grid 51 can be made of various materials, but a porous material made of synthetic resin is preferable. The buffer grid 51 withstands the load, and if the buffer grid 51 is a porous body, it exhibits the properties of the porous bodies 31 and 32 described above, although to a greater or lesser extent. The porous bodies 31 and 32 are filled in the space 51a provided by the buffer grid 51. Accordingly, the third bonding layer 300 is divided into a lower layer 50a, a porous layer 50b, and an upper layer 50c. The porous layer 50b absorbs moisture and releases it gradually, so that the third bonding layer 300 prevents swelling and maintains adhesion to the foundation 10 and the curb stone 20 .

The third bonding layer 300 is formed by sequentially stacking a lower layer 50a, a porous layer 50b, and an upper layer 50c from the surface of the base 10. The lower layer 50a and the upper layer 50c include a surface strengthening agent 33, and the porous layer 50b includes porous bodies 31 and 32. The surface reinforcing agent 33 is closer to the base 10 and the road boundary stone 20 to increase the effect of strengthening the surface of the base 10 and the road boundary stone 20. Moisture is concentrated in the porous layer 50b, so that the moisture does not spread throughout the third bonding layer 300.

5 is a cross-sectional view for explaining a fourth bonding layer 400 according to an embodiment of the present invention. At this time, the fourth bonding layer 400 is the same as the second bonding layer 200 except for the buffer grid 51 and the layer structure. For convenience of explanation, the buffer grid 51 is expressed as a plane.

Referring to FIG. 5 , the fourth bonding layer 400 includes a buffer grid 51 in a matrix form. The buffer grid 51 prevents the porous bodies 31 and 32 from being damaged when a load is applied to the pavement. The buffer grid 51 can be made of various materials, but a porous material made of synthetic resin is preferable. The buffer grid 51 withstands the load, and if the buffer grid 51 is a porous body, it exhibits the characteristics of the porous bodies 31 and 32 described above, although to a greater or lesser extent. The porous bodies 31 and 32 are filled in the space 51a provided by the buffer grid 51. Accordingly, the fourth bonding layer 400 is divided into a lower layer 60a, a porous layer 50b, and an upper layer 60b. The porous layer 50b absorbs moisture and releases it gradually, so that the fourth bonding layer 400 prevents swelling and maintains adhesion to the base 10 and the curb stone 20 .

The fourth bonding layer 400 is formed by sequentially stacking a lower layer 60a, a porous layer 50b, and an upper layer 60b from the surface of the base 10. The lower layer 60a and the upper layer 60b include the surface hardening agent 33 and the plate-shaped ceramic 40, and the porous layer 50b includes the porous bodies 31 and 32. The surface reinforcing agent 33 is closer to the base 10 and the road boundary stone 20 to increase the effect of strengthening the surface of the base 10 and the road boundary stone 20. The plate-shaped ceramic 40 bypasses the path of moisture, allowing the moisture to be more slowly absorbed and evaporated into the porous bodies 31 and 32, thereby more effectively preventing cracks in the fourth bonding layer 400. Moisture is concentrated in the porous layer 50b so that the moisture does not spread throughout the fourth bonding layer 400 .

In the above, the present invention has been described in detail with preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. possible.

10; base 20; curbstone
30; Emulsion layer 31; pottery body
32; potassium titanate porous body 33; surface hardener
40; plate ceramic
50a, 60a; lower layer 50b; porous layer
50c, 60b; upper floor
51; buffer grid
100, 200, 300, 400; First to fourth bonding layers

Claims (10)

Including the boundary stone bonding layer located between the foundation and the road boundary stone in the asphalt resurfacing,
The boundary stone bonding layer includes an emulsion layer dispersed in a solution including asphalt fine particles, an emulsifier, and a stabilizer, and includes a pottery porous body, and the pottery porous body includes a plurality of pores and has a weight of 1 to 5 based on the total weight of the bonding layer Including % by weight,
The boundary stone bonding layer is divided into a lower layer, a porous layer, and an upper layer, and a surface hardening agent, a layer made of plate-shaped ceramic, and a porous buffer grid are sequentially disposed on the lower layer and the upper layer,
The porous pottery body is filled in the space provided by the buffer grid, and the buffer grid prevents the porous pottery body from being damaged by a load,
The layers made of plate-shaped ceramics are disposed on both sides of the buffer grid, the layers made of plate-shaped ceramics form at least one layer while forming voids G, and the plate-shaped ceramics have an average length of 1 μm to 10 μm,
The surface reinforcing agent is a road boundary stone including a boundary stone bonding layer for re-construction in asphalt resurfacing, characterized in that located on the outside of the layer made of the plate-shaped ceramic with respect to the buffer grid. The boundary stone for re-construction in ascon resurfacing according to claim 1, wherein the porous pottery body contains porous silicon carbide powder, and the silicon carbide powder contains 5 to 50% by weight based on the total weight of the porous pottery body. Road curbstone including bonding layer. The road boundary stone including a boundary stone bonding layer for re-construction in asphalt resurfacing according to claim 1, wherein the boundary stone bonding layer further comprises 1 to 5% by weight of a potassium titanate porous body including a plurality of pores. delete The road boundary stone including a boundary stone bonding layer for re-construction in asphalt concrete resurfacing according to claim 1, wherein the surface reinforcing agent is an inorganic reinforcing agent containing alkali silicate. delete [4] The road boundary stone according to claim 1, wherein the plate-shaped ceramics are arranged parallel to each other, inclined to each other, or combined with each other. delete delete delete

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