JPS6028961B2 - Resilient pavement construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of turning resilient pavement suitable for cushion pavements on golf courses, cushion pavements on racetracks, playgrounds, tennis courts, playgrounds in kindergartens, walking paths in parks, and the like.

Conventionally, heated asphalt concrete paving or simple paving using asphalt emulsion have been used for the paths between each hole in a golf course, but when people wear golf shoes,
This had the disadvantage that it caused fatigue in the head when walking, and there was also a risk of slipping on the road surface in rainy weather.

For this reason, some places use rubber sheets or resin sheets, but these have the drawbacks of being prone to slipping during rainy weather, being expensive, and lacking in durability. In addition, polyurethane-based resilient pavement is used in places other than golf courses, such as playgrounds, tennis courts, and kindergarten playgrounds, but the polyurethane resin is a two-component reactive type that reacts and foams when exposed to moisture. Therefore, it is necessary to be careful about the weather, the material to be mixed, the lathe base, etc., to avoid moisture, and it also has drawbacks such as being expensive.

In addition, it is used as a paving material for walking paths in golf courses.
proposed a paving material consisting of sand, rubber shoulder, filler and rubberized asphalt. However, since this paving material is a heated mixture, it requires equipment that can heat and mix the materials, making it difficult to manufacture.Moreover, the transportation, spreading, and compaction of the mixture are subject to temperature restrictions. There was a drawback that good turning could not be achieved unless these operations were carried out before the turning point deteriorated. The purpose of the present invention is to
To provide a turning method that improves the drawbacks of conventional elastic pavement and economically forms durable elastic pavement that is easy to turn, has excellent cushioning properties and walkability, and is free from slipping in rainy weather. It is something.

The present inventors have conducted numerous experiments on a method for creating resilient pavement with excellent cushioning properties by cold turning using a room-temperature mixture of rope blue emulsion, scrap rubber, and sand. After decomposing the emulsion, the surface of the mixture is heat-pressed using a smoother heated with a propane gas burner as a trowel to smooth the surface.
It was discovered that by melting a light blue material, melting a part of the waste rubber into the light blue material, and making them compatible, the waste rubber and sand can be combined by baking to create a pavement body in which the entire mixture is integrated.

When this pavement was made on an experimental basis and people walked on it with spiked shoes, the tips of the studs of the spiked shoes would become wedged in the pavement due to the human load, but as soon as the load was removed, they would return to their original state and the cushioning properties would be improved. It was also found that the walking support capacity and walkability were good. Furthermore, if the thickness of the pavement is 5 skins or less, 1
It was found that it can be turned with a single turn and has excellent durability, weather resistance, etc. Furthermore, the hardness, elasticity, etc. can be changed by changing the formulation, and by applying a highly abrasion-resistant and durable colored finishing material (for example, paint), the elasticity of the colored finish can be adjusted to suit various uses. They discovered that pavement can be easily made and completed the present invention. That is, in the present invention, after lathing a prime coat or a tack coat on a base, a room-temperature mixture consisting of 15 to 3% by weight of scrap rubber, 40 to 65% by weight of sand, and 15 to 3% by weight of cyan blue emulsion is applied. (hereinafter simply referred to as an elastic emulsion mixture) is spread and compacted, and then the surface is heated and pressed with a trowel or a heated roller to form a phosphorized continuous pavement. The purpose of the present invention was achieved using the anchor construction method.

The term "base" as used in the present invention refers to the base on which the resilient pavement is lathed.

Ordinary vertically hardened roadbed, roadbed made by putting gravel, crushed stone, sand, etc. on the roadbed and hardening it with cotton, crushed stone roadbed, incised crushed stone roadbed, granular crushed stone roadbed, soil cement/cement stabilized roadbed, mint blue stabilized roadbed The base is roadbed, bituminous emulsion treated roadbed, roaring pavement, concrete pavement, stone block pavement, wood block pavement, steel slab, wooden slab, etc. These substrates are usually prime coated or tack coated prior to lathe of the resilient emulsion mixture. The prime coat or tack coat is made of a blue emulsion, cutback asphalt, tar, etc., which are used in ordinary raised pavement.

The scrap rubber used in the present invention is powdered rubber (for example, one with a particle size of 5 to 6 or less), string rubber (for example, one with a diameter of 2 ribs or less and a length of 15 ribs or less), etc., and is usually an old automobile tire. It is obtained by crushing, crushing, or retreading tires.

Scrap rubber may contain some fibers from tread, etc., and such scrap rubber can also be used. Scrap rubber provides elasticity and cushioning properties to the elastic pavement. The sand used in the present invention corresponds to pongee aggregate in pavement, and includes river sand, sea sand, mountain sand, cinnabar sand, foundry sand,
These include crushed glass sand, crushed ceramic sand, iron sand, crushed stone dust, sand condensed with ash, whitebait, and masa soil.

The light blue emulsion used in the present invention is suitable for petroleum asphalts such as straight asphalt, semi-prone asphalt, blown asphalt, propane deasphalt asphalt, and cutback asphalt, natural asphalt, tars such as coal tar and oil gas tar, and pitch. A noisy substance is a mixture of one or more selected from the following roaring substances, and some are emulsifiers made by adding and mixing elastomers such as rubber and thermoplastic polymers to these luminous substances and modifying them. It is a blue emulsion that is dispersed into fine particles in water using a suitable emulsifier such as a Harel homogenizer or a colloid mill. Further, a mixture of rubber latex, emulsion of a thermoplastic polymer, etc. can also be used. In addition to the above, there are various substances added to the light blue emulsion in order to improve emulsifying properties, adhesion, compatibility, aging resistance, etc., and these roaring emulsions can also be used. Gradual emulsions can be classified into nonionic, anionic, cationic, clay-type, etc. types depending on the emulsifier, and any type of emulsion can be used.

For the roaring emulsion, use an emulsion that can be mixed well with waste rubber, sand, etc. Further, the light-growing emulsion usually has a non-volatile content of 50 to 7% by weight. It can be used even if the concentration is higher or lower than this. Among the types of light blue materials used in blue emulsions, asphalt is generally superior to tar in terms of washability, low temperature resistance, weather resistance, etc., but tar is superior to asphalt in terms of oil resistance and water resistance.

Further, the use of an elastomer is useful for improving the adhesiveness, heat resistance, low temperature resistance, elasticity, etc. of the blue emulsion. Examples of rubbers and thermoplastic polymers used in light blue emulsions are as follows. Rubbers include natural rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, isoprene rubber, butyl rubber, ethylene-propylene rubber, chlorinated polyethylene rubber, styrene-butadiene block polymer rubber, styrene-isoprene block polymer rubber, etc. .

Thermoplastic polymers include ethylene/acrylate copolymer, ethylene/vinyl sulfate copolymer, polyacrylate, acrylate ester/vinyl rust copolymer, maleate ester/vinyl chlorate copolymer, and polyester. Vinyl chloride, vinyl chloride/vinyl rust copolymer, pinylidene chloride/vinyl chloride copolymer, polyvinylidene chloride, styrene/acrylate copolymer, acrylonitrile/butadiene/styrene copolymer, acrylonitrile/
Styrene copolymers, etc.

The elastomeric emulsion mixture used in the present invention comprises the above-mentioned materials scrap rubber, sand, and bituminous emulsion in an amount of 15-3% by weight of scrap rubber, 40-65% by weight of sand, and 15-3% by weight of roaring emulsion. It is obtained by mixing in the ratio of

When the above compounding ratio is less than 15% by weight, the elasticity is insufficient, and when it exceeds 30% by weight, the elasticity is good, but it is soft against the walking load (the cheek is too concave). be. When sand is less than 4% by weight, it has elasticity, but it tends to be too soft and concave against the walking load, and conversely, when it is more than 7% by weight, it is not elastic enough. When the amount of the blue emulsion is less than 15% by weight, the amount as a binder is insufficient, and on the other hand, when it exceeds 3% by weight, the amount of the blue blue emulsion is too large and the pavement becomes soft. The elastic emulsion mixture is obtained by mixing each material in a predetermined ratio using a suitable mixing device such as a pug mill, mortar mixer, concrete mixer, etc., and the mixing order of the materials can be freely selected.

The elastomeric emulsion mixture may also contain cement, flyash, gypsum, lime, stone dust, pigments, fibers, etc. to accelerate its decomposition, to impart color, reinforcement and other properties.
Cork powder, wood flour, etc. may also be added. Further, in order to adjust the workability of the elastic emulsion mixture, water can be added, and a surfactant, a dispersant, etc. can also be added. For example, when turning during high temperature days in summer, put rubber scraps and sand in a mixer, mix them, add a small amount of water, wet the surface of the rubber scraps, sand, etc. with water, and then add the blue emulsion. This improves mixability and workability. At this time, it is more effective to add a small amount of surfactant or dispersant to the water. 'On the other hand, when decomposition of the light blue emulsion is slow, such as during winter, it is a good idea to use a light blue emulsion that decomposes quickly, or to speed up the decomposition by using a small amount of cement, fly ash, etc. Next, the turning method for resilient pavement according to the present invention will be explained with reference to the drawings.

The figure shows a cross-sectional view of a pavement formed by the turning method of resilient pavement of the present invention. In the figure, 1 is the base. 2 is lathed onto the base 1 with a prime coat or tack coat.

3 is a layer formed by rolling, melting and pressing an elastic emulsion mixture;
After the elastic emulsion mixture is leveled and compacted onto the base 1, which has been lathed with prime coat or tack coat 2, it is heated and pressed with an Akatsuki trowel or heated roller, and is phosphorized and bonded to the base 1, making it continuous. It forms a paving body.

4 is a seal coat, which is a finishing layer such as a colored finishing material, and is lathed and bonded onto the phosphorized layer 3, which is heat-pressed and phosphorized with a T elastic emulsion mixture.

Next, the turning method for resilient pavement according to the present invention will be explained.

Various types of foundations are adopted depending on the purpose of the resilient pavement, the condition of the roadbed, weather conditions, etc. For example, at a golf course, a roadbed is created by rolling granulated crushed stone or cut crushed stone (less than 3 mm) with a leveling roller several times about 5 to 15 skin thickness on the existing roadbed. Asphalt pavement or concrete pavement may be used as a base for playgrounds, tennis courts, etc. Before spreading the ballistic emulsion mixture on the base, a prime or tack coat of blue emulsion, cutback asphalt, tar, etc. is first applied.

For example, the amount of cationic penetrating asphalt emulsion PK-4 in the prime coat on the roadbed is 0.5 to 2.
0〆/〆Scatter. For tack coats on asphalt pavement, asphalt emulsion fertilizer K-4 is applied every 0.4 to 0.8 days. When installing new asphalt pavement, tack coat may be omitted. Next, a prime coat or tack coat is applied to spread the elastic emulsion mixture onto the base to a desired thickness.

Conventional techniques are used as is for the machinery and equipment used for leveling and the leveling method. The thickness of one-time laying is
The finished thickness after roller rolling is 5 skins or less, preferably 4 skins or less. It is usually 0.5 to 3 degrees thick. Next, after the emulsion of the elastic emulsion mixture has been decomposed to some extent, it is rolled by a roller or the like.

The compaction is carried out using, for example, a light roller, a bomac vibrating roller, a vibrating tamper, or the like. In this way, a flat paved surface is created, and then the paved surface is stroked from the surface with a rice bran trowel (for example, by heating a smoother with a propane gas burner or a kerosene burner), and the paved surface is heat-pressed and attached. . When the paving surface is stroked with a trowel, the heat melts the material, and some of the waste rubber melts in the grooves, and the waste rubber, sand, and material are firmly bonded together, and they are crimped together. Together they form a pavement. It is also possible to heat the elastic emulsion mixture layer in advance using a road heater, panel heater, infrared heater, etc. before stroking the paved surface with a trowel to accelerate the decomposition of the emulsion and to heat the emulsion. Such a method is effective when the weather is easily changeable or when the temperature is low in winter. The same results can be obtained by using a heated roller instead of a hot iron in the above method. In this case, it is preferable to use an iron-wheeled roller to heat the roller itself and also heat the paved surface and roller surface in front of the roller to be rolled with a burner. After leveling and compacting the elastic emulsion mixture in this way, a continuous elastic pavement can be formed by heat-pressing the surface with a baking iron or a heated roller. .

The elastic pavement obtained by the method of the present invention can be put to practical use as it is, but the surface may be finished with a seal coat or various finishing layers.

For example, if the paths between holes of a golf course or the surface are not colored, the surface of the elastic pavement is coated with a seal coat using a growth emulsion, a slurry seal, or the like.

When the surfaces of playgrounds, tennis courts, children's play areas, etc. are colored, various colored finishing materials are applied to the surface of the ballistic pavement. If flatness is particularly required, the surface of the elastic pavement may be sanded to remove convex surfaces, or
The surface is flattened by applying a mixture of light blue emulsion, rubber latex, synthetic resin emulsion, etc. with sand, filler, fibers, etc. to the surface, and then the colored finishing material is turned. Colored finishing materials include solvent-free types, emulsion types, and solvent-based types, but those that are wear-resistant and elastic are used.

For example, as a solvent-free type, a polyurethane type is used.

Emulsion type products include acrylic resin emulsion, acrylic resin emulsion mixed with rubber latex, polyvinyl chloride emulsion mixed with nitrile rubber latex, ethylene hard acid vinyl resin emulsion, and ethylene hard acid vinyl resin emulsion and rubber. Those based on a mixture of latex, a mixture of rubber latex with an epoxy resin emulsion, a mixture of rubber latex with an alkyd resin emulsion, etc. are used. In the solvent type,
Chloroprene rubber/synthetic resin type, chlorosulfonated polyethylene type, chlorinated polyethylene type, chlorinated rubber type acrylic resin type, polyurethane type, acrylic urethane resin type,
Materials based on vinyl chloride resin, nitrile rubber, etc. are used. These colored finishing materials contain coloring agents such as pigments and dyes, and fillers, and mixtures of fibers, wood flour, cork powder, rubber powder, cinnabar sand, etc. are also used.

Colored finishes are usually applied in two or more coats. You can also select the color of the colored finishing material and finish while drawing various patterns. The elastic pavement has good adhesion and compatibility with the above-mentioned various colored finishes, so that a well-colored elastic pavement can be obtained. However, with solvent-based colored finishing materials, you need to be careful as the light blue color may appear depending on the type of solvent used. Usually, a spin-drying type is used. Next, the features and effects of the resilient pavement turning method of the present invention will be described.

○) Anchor construction is easy.

Elastic emulsion mixtures are easy to lathe because they are mixed at room temperature, spread and compacted at room temperature, and can be turned easily even in high places such as rooftops and in narrow spaces.

Thin: Excellent elastic cushioning properties and good walking performance.

The elastic emulsion mixture layer is laid flat, rolled and then heated and pressed with a hard iron and baked, resulting in a good flat finish.

In addition, it contains a large amount of waste rubber, a part of which is melted into the green material, and the waste rubber and sand are firmly bonded and pressed together, so it has good elastic cushioning properties. In particular, it is inexpensive and easy to turn, and the thickness of the lathe can be reduced to about 3 mm at a time, so it has good cushioning properties and has good support for walking, and when walking, it is possible to The hardness does not affect the human body. For example, resilient paving according to the method of the present invention is lathed on the path between each hole of a golf course, and golf shoes are worn on it.
Even when walking, the tips of the studs in golf shoes are moderately combed into the pavement, and the bumps do not cause any irritation to the head, and the pavement returns to its original state when the weight of the person is removed. No slipping even in rainy weather. I don't want to fall. Additionally, it is possible to create products suitable for specific uses by changing the composition.

Glue The surface will not soften due to sunlight. The layer of elastic emulsion mixture is heated and melted using a trowel, etc., and then baked and pressed together, so it will not become soft even if the surface is ripened by the summer sunlight. Also, the green material does not flash or breathe. Therefore, even when used in places where people exercise vigorously, such as a playground or a tennis court, it is possible to exercise comfortably. Good results can be obtained in both warm and cold regions.

(4) Colored pavement can be finished according to the purpose.

Because the layer of resilient emulsion mixture is fused, there is less flashing and breathing of the green material, so a variety of colored pavement finishes can be easily produced. Field: Excellent water resistance, wear resistance, and durability.

The layer of the elastic emulsion mixture is made by heating and melting the grain, melting a part of the waste rubber, and then aging and pressing together with the waste rubber and sand, which has excellent water resistance and abrasion resistance.
In addition, it can be lathed thickly, and when combined with a finishing layer, it can produce products that exhibit performance suitable for various uses and have excellent durability and usability. The turning method of the present invention will be explained in more detail below with reference to a few examples.

Example 1 Table 1 Crushed stone (maximum grain size: 3 cm) is spread on the path between holes of a golf course to a surface area of about 7 cm, and then rolled with a roller.

Next, as a prime coat, a cationic asphalt emulsion PK-4 (evaporation residue: 55% by weight, penetration of evaporation residue: 180) is sprayed at a ratio of 100 mm/100 mm. Therefore, an elastic emulsion mixture at room temperature prepared according to the formulation shown in Table 1 was spread to a thickness of about 4 cm, and this was rolled using a Bomac vibrating roller.

Next, a smoother that can be heated continuously with a propane burner is used as a trowel next to it to smooth the surface of the transferred compound and apply it. It melts and is pressed together with scrap rubber, bonding with sand and compressing it to form a continuous pavement. A resilient pavement according to the method of the present invention was thus formed. Next, asphalt emulsion cape K-2 for cationic penetration
(Evaporation residue 55% by weight, penetration of evaporation residue 196)
Seal coating was performed by spreading sand at a ratio of 100/100, followed by spreading sand at a ratio of 0.4/100.

When a person walks while wearing golf shoes, the tips of the studs of the golf shoes touch the paved surface appropriately and do not get jammed or slip, and do not cause cracks on the head, so the wearer does not get tired. When I lifted my foot again, the pavement surface immediately returned to its original state. It did not slip even in rainy weather and had good durability. Example 2 Table-2 Cationic penetrating asphalt emulsion PK-4 was applied as a prime coat on concrete pavement at 60 min/10
0 Spray at that rate.

Next, an elastic emulsion mixture having the composition shown in Table 2 is spread on top of this at room temperature to a thickness of about 15 mm and is rolled using a leveling roller. Next, a tandem roller with a heated iron ring is used to heat the paved surface with a kerosene burner and compact it. A smoother partially heated with a propane burner was also used. Thus, a flat resilient pavement was formed. The next day, the surface was finished with three coats of a colored paint based on acrylic resin emulsion and nitrile rubber latex. This thing is
It was lathed to test its suitability for tennis courts, but it has excellent cushioning properties and improves the bounce of tennis balls.
Walking performance during exercise was also good. Furthermore, good results were obtained in that there were no IJ flexion cracks from the joints or cracks in the concrete slab of the underlying foundation.

[Brief explanation of the drawing]

The figure shows a cross-sectional view of a pavement formed by the turning method of resilient pavement of the present invention. The symbols in the figure are explained as follows. 1...
Base, 2...Prime coat or tack coat, 3.
. . . Layer formed by rolling and hot melting of an elastic emulsion mixture, 4 . . . Seal coat or colored finishing layer.

Claims (1)

[Claims] 1 After lathe prime coat or tack coat on the base, add 15 to 30% by weight of scrap rubber and 40 to 6% of sand.
5% by weight of a bituminous emulsion and 15 to 30% by weight of a bituminous emulsion is leveled and compacted at room temperature, and then the surface is heated and pressed to form a continuous pavement by baking. Paving turning method.