JPH06272205A - Construction method of stipple pavement - Google Patents

Abstract

PURPOSE:To easily provide a pavement having a pattern excellent in durability by spraying selectively a colored aggregate having a specific grain diameter or laying a transfer sheet on a surface of crushed stone mastic mixture laid uniformly on a bedrock, and burying the colored aggregate by rolling of a roller. CONSTITUTION:Crushed stone mastic mixture 2 composed of heating asphalt mixture or the like is laid uniformly on a bedrock 1, and a colored granular material (aggregate) 3 is sprayed in a pattern shape on it, or a transfer sheet 5 formed by sticking the granular material 3 on a sheet is laid. Next, the crushed stone mastic mixture 2 is compacted by a rolling roller 4, and the granular material 3 is buried in a road surface. Otherwise, if it is necessary, the granular material 3 is selected from a material of not less then 1/2 of maximum grain diameter of aggregate 2, or an epoxy resin or the like is laid, and scattering of the granular material 3 is prevent. Thereby, a pavement having durability and design characteristic can be obtained easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement (hereinafter referred to as "dotted pavement") having a beautiful and excellent design and having a dot pattern suitable for amenity pavement and landscape pavement.

[0002]

2. Description of the Related Art With the recent diversification and sophistication of social needs, there is a demand for color pavement with a colored pattern on the pavement surface from the viewpoint of amenities and landscape.

As a conventional technique of color pavement using a paving mixture, a method of coloring by adding a large amount of pigment at the time of manufacturing the paving mixture, coloring aggregate is mixed with the paving mixture or sprayed from the surface to color. A method of making a color pavement by the color of aggregate is known.

The method of coloring by adding a pigment is a simple method that can be applied in the same manner as general pavement, except that the pigment is added to an asphalt-based, cement-based or resin-based paving mixture. is there.

When applied to an asphalt mixture, since the straight asphalt is close to black, the coloring is limited to dark brown, and the color effect as a color pavement is poor. In order to enhance the color developability of pigments, a method of using a decolorizing binder instead of straight asphalt is also used. The decolorizing binder is a pale yellow binder that has the same properties as straight asphalt, and it can color the mixture vividly, but in addition to the expensive decolorizing binder, it also prevents contamination of the mixture and the occurrence of color spots in the manufacturing plant. It is necessary to carefully perform cleaning of paving machines and temperature control of the mixture.

[0006] In addition, regardless of the type of binder used, the color pavement that is colored by adding a pigment causes fading that deteriorates with time due to weather effects such as ultraviolet rays, rainfall, and temperature changes, and causes the color to fade immediately after construction. Is extremely difficult to maintain for a long time.

Furthermore, since it is difficult to draw a pattern with a plurality of colors, the color pavement colored with a pigment is limited to the road surface coloring with a single color and is inferior in design.

[0008] The method of mixing the colored aggregate into the paving mixture is carried out by paving a mixture in which the aggregate used in the ordinary paving mixture is replaced with the colored aggregate, and abrading the mortar on the paving surface with a traffic vehicle. The colored aggregate is colored.

This method is less likely to cause discoloration, but a large amount of expensive colored aggregates must be used in order to obtain a color effect, which is inferior in economic efficiency and 3 to 3 times until uniform color development is obtained. It takes as long as 10 months. In order to obtain early color development, a method of forcibly removing the mortar component present on the pavement surface by performing shot blasting with a steel ball or sand blasting with silica sand after paving has been attempted. In addition to having to add a new treatment step, this method cannot easily remove the mortar unless the asphalt in the pavement has an appropriate hardness, making it difficult to select the blast treatment time and the treatment work. Steel balls and silica sand that scatter during the process become a problem in terms of environment and safety.

The method of spraying and press-fitting the colored aggregate on the surface of the paving mixture is as follows: The colored aggregate is sprayed on the paved mixture, which is spread evenly by inputting, and the roller is pressed by a roller to roll the colored aggregate on the road surface. It is to be pressed into.

In this method, since the gripping force of the press-fitted colored aggregate depends on the inclusion of the mortar component in the paving mixture, the applicable paving mixture is a mixture containing a large amount of the mortar component. Limited. Taking an example of an asphalt mixture, the mass percentage passing through a 2.36 mm sieve is 45.
Limited to special manufacturing equipment such as rolled door asphalt and goose asphalt with an aggregate particle size of at least%, construction equipment, and mixtures that require skilled skills. Furthermore, in this type of asphalt mixture, the press-fitting resistance of the colored aggregate tends to increase or decrease with the temperature change of the asphalt mixture, so that the press-fitting state of the colored aggregate becomes uneven depending on the construction conditions, especially the colored bone that is insufficiently press-fitted. The material is exfoliated and scattered by the transportation vehicle after use. For this reason, while the asphalt mixture is maintained in a predetermined temperature range, it is necessary to quickly perform the coloring aggregate spreading and press-fitting work, but the time constraint of the spraying work that often relies on human power is It promotes the generation of color spots due to uneven distribution of aggregate.

Therefore, this method can reduce the amount of the colored aggregate used, and the coloring of the colored aggregate can be obtained at an early stage, but it is difficult to avoid the scattering of the colored aggregate and the exfoliation and scattering, which is originally required for the color pavement. It is the actual situation that the aesthetics of being damaged are impaired.

Further, in the method using colored aggregates, it is possible to use colored aggregates of a plurality of colors, but it is extremely difficult to draw a pattern by properly using the colored aggregates, and the design is inferior.

As another conventional technique, Japanese Patent Laid-Open No. 2001-2001
No. 01 is a water-permeable pseudo-gravel pavement having a chip layer made of aggregate chips on a water-permeable pavement substrate, and at least a part of the chip layer is subjected to an adhesive treatment. It is disclosed.

In this pavement, it is possible to design a sand painting pattern or the like on the road surface by using a plurality of aggregate chips of different colors and qualities, but the intrinsic adhesive strength between the aggregate chips and the pavement substrate is low, so that Poor design retention characteristics, such as chips with different colors and qualities that form a sand picture pattern are mixed over time.

Further, in Japanese Patent Laid-Open No. 3-115601, a colored asphalt mixture is molded, and the decorative granules are sprinkled on the surface layer of the molded asphalt mixture and rolled, and then the asphalt mixture is appropriately prepared. Disclosed is an asphalt pavement board characterized by being cut into a shape, a method for manufacturing the same, and a method for constructing the same.

In this pavement plate, as in the case of a general pavement block, a pavement plate manufactured in advance must be carried into a construction site and arranged by input, which requires a great deal of labor and time for construction. Further, in the manufacturing process of this pavement board, after the asphalt mixture is molded, the granules are scattered to finish rolling, so that the embedding of the granules into the asphalt mixture is likely to be insufficient, and The particle size of the body is limited to about several mm, and it is difficult to draw a pattern using a plurality of granular bodies.

[0018]

As described above, as the color pavement using the paving mixture, it is desirable to use a colored aggregate that does not cause discoloration, and the colored aggregate is originally mixed in the paving mixture. The method of spraying and press-fitting the colored aggregate excellent in early color development and economical efficiency is more preferable than the method of applying.

However, in the method of spraying and press-fitting the colored aggregate, the applicable pavement mixture is limited, and it is difficult to evenly spray and press-in the colored aggregate, resulting in poor color uniformity and design. There's a problem.

An object of the present invention is to eliminate the drawbacks of the prior art in the color pavement mainly using colored aggregates, and it is possible to uniformly and easily embed particulate matters such as colored aggregates on the road surface. Also, by applying a strong restraining force to the embedded particulate matter, it is possible to prevent the particulate matter from exfoliating and scattering from the road surface, and provide a construction method of point-painting pavement that is also excellent in designability, workability, economical efficiency, etc. To do.

[0021]

DISCLOSURE OF THE INVENTION According to the present invention, a granular material is placed on a crushed stone mastic mixture in a leveled state, and the crushed stone mastic mixture in which the particulate matter is placed is compacted, whereby It is a construction method of pointillistic pavement that consists of embedding in.

The present invention is based on the above-mentioned structure, but more remarkable effects can be obtained by taking the following means.

Firstly, a transfer sheet in which the granular material is adhered to a sheet-shaped support is prepared, and the granular material is arranged by laying it on a crushed stone mastic mixture in a state of being spread and leveled. Is a means.

The second means is to draw a pattern of the plane shape on the road surface by selectively arranging the granular material in a required plane shape.

The third is a means for arranging a combination of grain wastes having different colors.

The fourth means is to use mainly spherical aggregates as the granular material.

The fifth means is to use, as the granular material, an aggregate mainly having an aggregate particle diameter of 1/2 or more of the maximum aggregate particle diameter of the crushed stone mastic mixture.

The sixth means is to use a granular material coated with an adhesive.

Each of the above preferable means may be appropriately combined in two or more kinds.

The present invention will be described in detail below.

The crushed stone mastic mixture in a leveled state according to the present invention is required to maintain a loose state in which particulate matter can be pressed. Therefore, in the case of using a new crushed stone mastic mixture, the state before the compacting and compacting is performed by laying the crushed stone mastic mixture on the base by means of a laying machine and input corresponds to the laying and leveling state. For the leveled condition, the existing asphalt pavement with the surface layer made of crushed stone mastic mixture is targeted, the surface layer is heated and maintained in a heated state, the state is stiffened if necessary, and further scratched. The state by road regeneration, such as a state in which a new mixture or a regeneration additive is added to the loosened surface layer mixture and mixed and spread, is also included.

The crushed stone mastic mixture of the present invention is a mixture containing at least coarse aggregate, fine aggregate, filler and binder, and a heated asphalt mixture excellent in workability and economical efficiency is preferably used, but an asphalt-based room temperature mixture is used. Can also be used.

The aggregate particle size of the crushed stone mastic mixture is a gap particle size in which the amount of coarse aggregate and filler is large, and in the synthetic particle size, the amount passed through the 2.36 mm sieve is 45 wt% or less and the amount passed through the 0.075 mm sieve is 7% or more. Is desirable. More preferably, the amount passed through the 2.36 mm sieve is 2
0 ~ 35wt%, 0.075mm sieve passing 8 ~ 1
It is desirable to set it in the range of 5 wt%.

As the binder, in addition to straight asphalt for pavement, modified asphalt or asphalt emulsion is used, which is 5.0 to 8.0 wt% with respect to the weight of the aggregate.
It is blended with the amount of binder. In addition, 0.075m
It is desirable that the ratio F / A of the filler amount F, which is the amount passed through the m sieve, and the asphalt amount A, which is the binder, be 1.0 or more. In addition, the porosity of the pavement obtained by compacting the crushed stone mastic mixture alone is 2.0 to
It is preferably in the range of 4.0%.

In addition to these, various additives may be added in order to enhance the general properties of the crushed stone mastic mixture. In particular, since it is possible to increase the amount of asphalt in the crushed stone mastic mixture by adding plant fiber, it is effective to add about 0.1 to 1.0 wt% of plant fiber to the mixture weight. As the vegetable fiber, for example, a fiber containing α-cellulose as a main component and having an average fiber length of 1 mm and a width of about 50 μ can be mentioned.

The crushed stone mastic mixture may be colored by appropriately combining colored aggregates, bright aggregates, pigments, decolorizing binders and the like. Table 1 shows an example of the standard formulation of these crushed stone mastic mixtures. Conventional techniques can be applied to the compounding design, production, construction, etc. of the crushed stone mastic mixture. In the present invention, it is indispensable to use a crushed stone mastic mixture as a paving mixture, and even if a general paving mixture such as a dense-grained asphalt mixture is used, the intended effect cannot be obtained.

The granular material used in the present invention may be any granular material as long as it satisfies the required standard, and specific examples include natural aggregate such as bean gravel and crushed stone, and artificial bone. Materials, rubber particles and the like. Particularly when considering the landscape and aesthetics, it is preferable to use beautiful granular materials such as natural colored aggregate, colored resin-coated aggregate, and colored porcelain aggregate.
Further, for example, glass beads may be used when light reflection is desired, and rubber chips and the like may be used when elasticity is desired.

The shape and particle size of the granular material are not particularly limited. In order to reduce the shear resistance generated when the granules are pressed into the crushed stone mastic mixture and to embed the granules uniformly and surely, it is desirable to use spherical granules with less swelling. Regarding the particle size, in order to increase the binding force that acts on the particulate matter embedded in the road surface, it is preferable to be 1/2 or more of the maximum particle size of the aggregate of the crushed stone mastic mixture. It is more desirable to do. From the viewpoint of workability and pavement structure, it is desirable that the upper limit of the particle size be not more than the layer thickness of the crushed stone mastic mixture.
For the purpose of making the embedding uniformity more remarkable,
The particle size of the granular material is, for example, 13 to 10 mm, 10 to 8 mm
For example, it may be adjusted to a single particle size.

In order to further enhance the exfoliation and scattering prevention effect of the particulate matter embedded in the road surface, it is desirable to coat the particulate matter with an adhesive. The adhesive may be any conventionally known adhesive such as an asphalt-based adhesive, a resin-based adhesive, or a rubber-based adhesive, but an adhesive having a high transparency so that the ground color of the granular material appears is preferable. When a heated mixture is used as the crushed stone mastic mixture, it is preferably coated with a hot melt adhesive.

These granules may be uniformly embedded on the entire road surface or may be embedded according to a desired design. In order to further enhance the design, it is possible to combine and embed granular materials having different colors and shapes.

The amount of the particulate matter embedded is preferably such that a part of the crushed stone mastic mixture is exposed in the state where the particulate matter is placed on the crushed stone mastic mixture.
An excessively large amount of embedding causes defective press-fitting, and an excessively small amount of embedding causes insufficient coloring effect. From this perspective,
In consideration of characteristics such as crushed stone mastic mixture, granules, and design, the optimum amount is usually determined in the range of about ² to 15 kg / m ² .

In the present invention, it is preferable to prepare a transfer sheet in which the granular material is attached to a sheet-shaped support. The sheet-shaped support in the transfer sheet has a thickness of 10 μm.
Films, sheets, cloths, non-woven fabrics, papers and the like made of various plastics having a size of about 1 mm are preferable, and it is desirable that they have flexibility that can follow the behavior of the crushed stone mastic mixture during compaction.

For sticking the granular material to the sheet-shaped support, a conventionally known adhesive such as resin or rubber can be used. It is preferable that the adhesive has such an adhesive force that the particles do not fall off the sheet-like support and do not hinder the embedding of the particles on the road surface.

The shape and size of the transfer sheet are not particularly limited, but are generally quadrangular or long and have a size of several tens of cm.
A tens of meters is used. The transfer sheet may be used alone or a plurality of transfer sheets may be continuously applied.

The transfer sheet is effective for preventing unevenness in the arrangement of the granular materials, shortening the time for arranging the granular materials, and the like, since the granular materials can be attached to the sheet-shaped support in advance. Therefore, the transfer sheet is particularly preferably used in the case of embedding the granular material on the road surface in accordance with a desired design or in the case of embedding the granular material having different colors in combination on the road surface.

Next, the pavement according to the present invention will be described with reference to the drawings.

FIG. 1 is a conceptual diagram showing an example of pavement according to the present invention. In the figure, 1 is a foundation, 2 is a crushed stone mastic mixture, 3 is a granular material, and 4 is an iron wheel roller.

In the case of a new installation, the surface of the base 1 is prepared, and the crushed stone mastic mixture 2 is spread on the surface by using a paving spreader and the like. When the existing asphalt pavement having a surface layer made of the crushed stone mastic mixture 2 is targeted, the surface layer is heated by using a regeneration road surface heater or the like. If necessary, this is crushed using a road surface layer regenerator, etc., mixed with a new crushed stone mastic mixture and a regeneration additive, and then spread.

Subsequently, a predetermined amount of granular material 3 such as colored aggregate is placed on the surface of the crushed stone mastic mixture 2 in a spread state. Examples of the method of arranging the granular material 3 include a method of arranging by a spraying machine or human power, a method of arranging using a transfer sheet, a method of combining these, and the like.

The crushed stone mastic mixture 2 in which the particles 3 are arranged is compacted using a compaction machine such as an iron wheel roller 4 to construct a pavement in which the particles are embedded in the road surface.

FIG. 2 is a conceptual diagram when a transfer sheet is used. In the figure, 5 is a transfer sheet and 6 is a sheet-like support.

The transfer sheet 5 manufactured in advance is prepared near the application site.

A new crushed stone mastic mixture 2 is spread on the prepared base 1 and leveled. Alternatively, the surface layer of the existing asphalt pavement composed of the crushed stone mastic mixture 2 is heated, and if necessary, it is laid down by squeezing it.

The prepared transfer sheet 5 is laid on the crushed stone mastic mixture 2 in a state of being spread, with the granular material 3 attached to the transfer sheet 5 facing the crushed stone mastic mixture 2.

Subsequently, the granular material 3 is pressed into the crushed stone mastic mixture 2 from the laid transfer sheet 5 by compaction by rolling with an iron wheel roller 4 or the like.

At the stage where the press-fitted granular material 3 is fixed, the sheet-like support 6 in the transfer sheet 5 is peeled off and removed, whereby the pavement according to the present invention is obtained.

FIG. 3 is a perspective view showing a pavement according to the present invention in which particles are embedded according to a desired design, and FIG. 4 is a perspective view showing a pavement according to the present invention in which particles with different colors are combined and embedded. In the figure, 7 is a yellow granular material,
8 is a green granular material.

The surface of the pavement constructed according to the present invention may be coated with an epoxy resin, an acrylic resin, or the like to improve the effect of preventing the embedded particulate matter from exfoliating and scattering from the road surface. .

[0059]

In the construction of the stippled pavement of the present invention, the granular material is placed on the crushed stone mastic mixture in a leveled state, and the granular material is compacted simultaneously with the crushed stone mastic mixture so that the granular material is formed on the road surface made of the crushed stone mastic mixture. It is done by embedding.

The crushed stone mastic mixture in a spread state has a low mortar content and thus a low viscosity, and since the contact area between the coarse aggregates is small, the coarse aggregate easily moves. As a result, the shear resistance generated when the granular material is press-fitted is small, and the granular material can be uniformly and easily embedded. Further, due to the compaction action by the roller compaction and the like, the particulate matter is arranged and integrated with the coarse aggregate in the crushed stone mastic mixture at the most stable position. Further, the crushed stone mastic mixture is a mixture having a large amount of filler and binder and having a strong fixing force by so-called filler bitumen. Therefore, the embedded granular material is subjected to the restraining force due to the engagement with the coarse aggregate in the crushed stone mastic mixture and the fixing force due to the filler bitumen, and the synergistic effect prevents the particulate matter from flying off from the road surface. To prevent.

When the transfer sheet in which the granular material is adhered to a sheet-like support is laid on the crushed stone mastic mixture in a spread state, the granular material can be arranged by
Since it is possible to attach the granular material to the transfer sheet in advance according to the desired design, the granular material can be arranged more uniformly and quickly. The use of the transfer sheet is particularly effective when arranging the granular material according to a desired pattern or color. Further, by compacting the sheet-like support by rolling the roller or the like, it is possible to prevent the particulate matter from being damaged during compaction work.

When a means for selectively arranging the granular material in a required plane shape is used, a pattern of the required plane shape can be drawn on the road surface, and the designability is improved.

When a means for arranging granular materials having different colors in combination is used, it is possible to obtain a pavement rich in color.

When the granular material mainly composed of spherical aggregate is used, the shear resistance when the granular material is pressed into the crushed stone mastic mixture is reduced, and the granular material is uniformly and surely embedded. .

1 of the maximum particle size of aggregate of crushed stone mastic mixture
In the case of using a granular material mainly composed of an aggregate having a particle size of / 2 or more, the restraining force due to the meshing of the granular material and the coarse aggregate in the crushed stone mastic mixture is increased, and it is embedded in the road surface. The exfoliation prevention effect of the granular material is improved.

When the particles coated with the adhesive are used, the particles embedded in the road surface are more firmly fixed. In particular, when embedding a hot-melt adhesive-coated granule in a heated mixture, the adhesive is remelted by contact with the heated mixture and then hardened by cooling to firmly bond the granule and the crushed stone mastic mixture. . At this time, if a transfer sheet is used, the re-melted adhesive acts also as a release agent between the granular material and the sheet-shaped support.

When the method of the present invention is applied to an existing crushed stone mastic pavement, it is possible to integrally improve the quality of the existing surface layer and restore the road surface condition.

[Example 1] The effect of pavement according to the present invention on embedding of granular material is shown by test results.

(Factors taken up in the test) Pavement mixture: crushed stone mastic mixture, roll door asphalt mixture, dense particle size asphalt mixture (see Table 2 for compounding) Granules: natural bean gravel (particle diameter 10 mm Transfer sheet: A sheet made of polyethylene, which is a sheet-like support, is coated with the acrylic pressure-sensitive adhesive to give 5.5 g of the above granular material.
30 cm / 30 cm sheet uniformly attached at a rate of g / m ² Measurement item: Transfer rate (weight A of the particles attached to the transfer sheet before the test and weight B of the particles embedded in the test piece B And weight ratio B / A)

(Test Method) Specimens were prepared according to the wheel tracking test method. Measured with the formulation shown in Table 1,
Each paving mixture mixed is 30 cm on a side.
It was put in the formwork of and the surface was lightly shaped with a hand roller. After laying the transfer sheet prepared in advance on the surface of the shaped paving mixture, the rolling temperature is set to 150 ° C., 130 ° C.
C., 110.degree. C., and compacted using a roller compactor. When the temperature of each compacted pavement dropped to 60 ° C., the polyethylene sheet of the transfer sheet was peeled and removed.

For each of the specimens thus obtained, the weight of the pea gravel attached to the transfer sheet before the test and the weight of the pea gravel embedded in the specimen were weighed, and the transfer rates were compared and examined.

(Test Results) The test results are shown in Table 3.

The test pieces of the crushed stone mastic mixture according to the present invention have a higher transfer rate at all rolling temperatures and a transfer rate of 99% or more, as compared with those of the mixture for roll door asphalt and the dense asphalt mixture. From
It is clear that the crushed mastic mixture has better press-fitting characteristics for pea gravel than other paving mixtures.

Further, as a result of visual observation of the pea gravel embedded in the test piece, the gravel mastic mixture test piece was completely embedded with the pea gravel at all temperatures.
In the case of the other mixtures, the gravel with poor press-fitting in which only 1/2 to 2/3 of the particle size was embedded increased as the rolling temperature decreased.

Example 2 The test results show the effect of the pavement according to the present invention on the workability and serviceability.

(Factors taken up in the test) Paving mixture: crushed stone mastic mixture (13 mmto
p), two kinds of mixture for roll door asphalt (compound is shown in Table 2) Granular material: artificial aggregate (Sinopearl with a particle size of 10 to 8 mm, Synopearl with the above particle size coated with 1 wt% of EVA hot melt adhesive) , Spherical aggregate with a particle size of about 10 mm) Transfer sheet: A sheet made of polyethylene, which is a sheet-like support, and an acrylic pressure-sensitive adhesive are used to make 3.5 g of the above granular material.
A 1m x 1m sheet that is evenly attached at a rate of g / m ^2.

(Test Method) On the premises road, a construction test was conducted under the test conditions shown in Table 4 to examine the construction workability. No. depending on the test conditions. 1-No. The work was divided into 8 sections, and each section had a base surface made of crushed stone roadbed and was prime-coated. On top of this, pavement mixes of each width 2.
It was spread with an asphalt finisher so as to have a thickness of 5 m and a finished thickness of 40 mm.

In the input spraying section, the artificial aggregate was placed on the surface of the paved mixture that had been spread evenly at an input rate of 3.5 kg / m ² so as to form a square of 1 m on each side. Each pavement mixture in which the artificial aggregate was arranged was primary-rolled by an iron wheel roller, and then rolled by a tire roller to embed the artificial aggregate in the road surface.

In the construction section using the transfer sheet, the transfer sheet of 1 m × 1 m in which the artificial aggregate was evenly applied in advance corresponding to the square design was laid on the paving mixture spread and spread. Then, the artificial aggregate affixed to the transfer sheet was embedded in each paving mixture by rolling on the transfer sheet in the same manner as in the case of manual spraying. When the temperature of the mixture was lowered to 60 ° C., the polyester sheet of the transfer sheet was peeled off and removed to obtain a pavement in which the artificial aggregate was embedded in the road surface.

Each of the pavements thus obtained was used for traffic under the same conditions and a follow-up observation was conducted to compare and examine the serviceability of each construction section.

(Test Results) Table 4 shows the results of the construction test and the follow-up observation.

As a result of the construction test, the pavement (N
o. 1-No. 6) is the pavement of the comparative example (No. 7, N
o. Compared with 8), the placement unevenness and press fit unevenness of the artificial aggregate are extremely small, and a good coloring effect can be obtained. Therefore, it is clear that the pavement of the present invention is superior in workability and stability of quality to the pavement of Comparative Example. Became.

Pavement using spherical aggregate (No. 6)
It was also confirmed that the press-fitting property was better than that using the aggregate with square shape (No. 1).

Pavement using a transfer sheet (No. 1, N
o. It was also clarified that in 2), more uniform arrangement of the artificial aggregate and shortening of the working time can be obtained as compared with the case of the manual application (No. 3, No. 4).

The pavement (No. 1) in which the transfer sheet and the adhesive coating of the artificial aggregate are used in combination has a better peeling property of the sheet-like support than that in which the adhesive coating is not used (No. 2). It was also confirmed.

As a result of the follow-up observation for 6 months, the pavements according to the present invention (No. 1 to No. 6) were the pavement of Comparative Example (No.
7, No. Compared with 8), since the scattering of the artificial aggregate from the road surface is small and the holding property of the design is high, the pavement of the present invention secures a stronger restraining force acting on the artificial aggregate than the pavement of the comparative example and is durable. It became clear that it is excellent in sex.

Pavement in which the particle size of the artificial aggregate is 1/2 or more of the maximum particle size (13 mm) of the aggregate of the crushed stone mastic mixture (N
o. It was also confirmed that 1) was more excellent in the anti-scattering effect of the artificial aggregate and the design retention property than the one having a particle size of 1/2 or less (No. 5).

The pavement coated with the artificial aggregate with an adhesive (No. 1, No. 3) is superior to the uncoated one (No. 2, No. 4) in preventing scattering of the artificial aggregate. It was also confirmed.

[Example 3] The effect of the present invention for existing pavement will be shown by test results.

(Factors taken up in the test) Existing pavement: Crushed stone mastic mixture about 2 years after construction (standard composition is shown in Table 1) Granules: Same as Example 2 Transfer sheet: Example Use the same as 2

(Testing method) No. No. according to the test conditions shown in Table 5 on the premises road. 9-No. The test was carried out by dividing the work into 13 categories. The pavement on the premises road had a surface layer with a thickness of 50 mm, which was made of a crushed stone mastic mixture with the composition (13 mm top) of Table 1 as a standard, and about two years had passed after the construction. The pavement in the test area had evidence of rutting, and the flatness was slightly impaired.

In the test, the existing surface layer in each construction section was sufficiently heated by using a regeneration road surface heater and laid evenly.
No. 10-No. In the 12th section, following heating, a regeneration additive was sprayed at about 0.351 / m2, and the surface layer was disentangled using a road surface layer regenerator and spread (reform method). No. In Section 13, the regeneration additive was added to the existing surface layer mixture that had been heated and scraped, and this and a new asphalt mixture having the same composition as the existing surface layer were mixed and spread using a road surface layer regenerator (remixing). method).

On the asphalt mixture in a spread state obtained in this way, an artificial aggregate is arranged by a method similar to that of Example 2 by using human power distribution or a transfer sheet, and is compressed by a compaction roller. By doing so, we constructed a pavement with artificial aggregate embedded in the road surface.

Each of the constructed pavements was compared with each other by visual observation immediately after the construction and 6 months after the use of the pavement was restarted.

(Test Results) The test results are shown in Table 5.

As for the construction situation during pavement construction, as in Example 2, the placement irregularities and press-fit irregularities of the artificial aggregate are extremely small, a good color development effect is obtained, and the workability and the stability of quality are excellent. It became clear.

According to the visual observation immediately after the construction, No. 9
It was revealed that the road surface condition (flatness) was also recovered well, except that the unevenness of the existing surface layer was slightly left in the section.

As a result of visual observation conducted after 6 months,
It was also clarified that the pavement of the present invention is excellent in durability even when the existing surface layer is targeted, since the scattering of the artificial aggregate is small in each construction section and the holding property of the design is high.

[0099]

[Table 1]

[0100]

[Table 2]

[0101]

[Table 3]

[0102]

[Table 4]

[0103]

[Table 5]

[0104]

EFFECTS OF THE INVENTION According to the present invention, the crushed stone mastic mixture in a spread state has a low viscosity and the coarse aggregate easily moves, so that the shear resistance generated when the granular material is press-fitted is reduced. Therefore, the granular material can be uniformly and easily embedded in the crushed stone mastic mixture. The compacting action also causes the particles to align and integrate with the coarse aggregate in the crushed stone mastic mixture in the most stable position. Further, the crushed stone mastic mixture has a large amount of filler and binder, and a strong fixing force due to the filler bitumen acts on the granular material. As a result, the embedded particles are subjected to a restraining force due to the meshing with the coarse aggregate in the crushed stone mastic mixture and a fixing force due to the filler / hytmen, and the synergistic effect thereof causes the particles to be exfoliated from the road surface. It is possible to prevent scattering.

When a transfer sheet having particles attached is laid on a crushed stone mastic mixture in a spread state, the particles can be arranged more uniformly and quickly. Especially on the transfer sheet, it is possible to attach the granular material in advance according to the desired design,
A remarkable effect is exhibited when arranging the granular material according to a desired pattern or color. Further, by compacting the sheet-like support by rolling the roller or the like, there is also an effect of preventing contamination of particulate matter generated during compaction work.

When arranging the granular material in a required plane shape, a desired pattern can be drawn on the road surface, and the designability is improved.

When arranging granular materials having different colors in combination, there is an advantage that it is possible to select a pavement capable of exhibiting an optimum color effect in accordance with a desired design.

When the granular material mainly composed of spherical aggregate is used, the shear resistance generated when the granular material is pressed into the crushed stone mastic mixture by the roller compaction or the like can be reduced, and the granular material can be reduced. There is an effect that the embedding in the road surface becomes more uniform and reliable.

Aggregate of crushed stone mastic mixture Maximum particle size of 1
In the case of using granules mainly composed of aggregates having a particle size of / 2 or more, the binding force due to the meshing of the granules embedded in the road surface with the coarse aggregate in the crushed stone mastic mixture is increased. In addition, the effect of preventing the scattering of particulate matter is improved.

When the particles coated with an adhesive are used, it becomes possible to more firmly fix the particles embedded in the road surface. Especially when embedding granules coated with hot melt adhesive in a heated mixture,
After the adhesive is remelted by contact with the heated mixture and then cured by cooling, the particulate matter and the crushed stone mastic mixture can be firmly fixed to each other, and the handling characteristics can be improved. At this time, if the transfer sheet is used, the adhesive in the remelted state also acts as a release agent for the granular material and the sheet-shaped support.

Further, according to the present invention, the crushed stone mastic mixture has a good interlocking between the coarse aggregates, and it is possible to construct a dense pavement having a strong fixing force by the filler bitumen with a small number of voids. It is possible to provide a pavement that is beautiful and excellent in design, without sacrificing functions such as abrasion resistance, fluid resistance, watertightness, and long-term durability.

In the present invention, since the color effect is obtained by the embedded granular material, early color development is obtained and the color retaining effect is excellent. In addition, since the amount of the granular material used can be reduced, it also has an excellent economical effect.

The present invention does not require special equipment or skill for producing and applying the crushed stone mastic mixture, and the arrangement and embedding of the granular material are simple, so that the present invention has an effect of excellent workability.

Further, according to the present invention, when the existing crushed stone mastic pavement is targeted, the existing surface layer is heated and, if necessary, this is crushed, and the crushed existing surface layer mixture is further mixed with a new crushed stone mastic mixture or recycled. By adding and mixing the additives and laying them on the surface, the road surface properties can be recovered and the quality of the existing surface layer can be improved.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an example of pavement according to the present invention.

FIG. 2 is a conceptual diagram showing another example of pavement according to the present invention.

FIG. 3 is a perspective view showing an example of the pavement according to the present invention in which the granular material is embedded according to the design.

FIG. 4 is a perspective view showing an example of the pavement according to the present invention in which granular materials having different colors are combined and embedded.

[Explanation of symbols]

 1 base, 2 crushed stone mastic mixture, 3 granules, 4 iron wheel roller, 5 transfer sheet, 6 sheet support, 7 yellow granules, 8 green granules

Claims (7)

[Claims] 1. A stippling characterized in that a granular material is placed on a crushed stone mastic mixture in a spread state and the granular material is embedded in a road surface by compacting the crushed stone mastic mixture in which the granular material is placed. Pavement construction method. 2. The method according to claim 1, wherein the granular material is arranged by laying a transfer sheet in which the granular material is attached to a sheet-shaped support on the crushed stone mastic mixture in a spread state. 3. The method according to claim 1, wherein a pattern is drawn on the road surface by selectively arranging the granular material in a required plane shape. 4. The method according to claim 1, wherein particles having different colors are combined and arranged. 5. The method according to claim 1, wherein the granular material is mainly composed of spherical aggregate. 6. The method according to claim 1, wherein the granular material is mainly composed of an aggregate having a particle size of ½ or more of the maximum particle size of the aggregate of the crushed stone mastic mixture. 7. The method according to claim 1, wherein the particles are coated with an adhesive.