JPH06240611A - Paving material checking the growth of root - Google Patents

Abstract

PURPOSE:To prevent the growth of the weeds on a pavement and well drain after rain due to the porous pavement and increase abrasion resistance, cold resistance and elasticity, by paving a road with rubber chips, urethane binders, pigments, and checking agents against the growth of root. CONSTITUTION:Rubber chips, urethane binders, checking agents against the growth of root, and pigments are mixed agitated and by a mixer or the like to manufacture a paving materials. When the paving material is applied to a walking path of a golf course for instance, the substrate like an asphalt concrete pavement is first cleaned and dried. Next, a primer is applied and the paving material is spread evenly, made flat by a press-roller, and then left at a normal temperature to cure the urethane binder. In this case, the urethane binder is hardened like a rubber due to the water content in the air and hence, the substrate and the paving materials or the rubber chips in the paving materials are firmly stuck together. In this way, it can be used for a promenade, a jogging course, a crossing foot bridge, an athletic ground and it prevents the growth of weeds and provides comfortable walking or running feelings.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement material used for paving tennis courts, athletic fields, golf course paths or leisure facilities such as amusement parks.

2. Description of the Related Art Tennis courts, track and field stadiums, golf course paths, leisure facilities such as amusement parks were initially paved with natural soil such as clay and antuker. For this reason, there is a disadvantage that not only maintenance is required but also water is difficult to draw when it rains. In order to solve these drawbacks of natural soil, asphalt-based pavement materials, sheet-adhesive type where a sheet of synthetic resin such as urethane or rubber is directly attached to the base, and these sheets are laid on the asphalt-based pavement material. Various types of all-weather pavement materials have been developed, such as the type to be placed and placed. Asphalt-based pavement materials have the advantages that they can be colored freely and are inexpensive. However, there is a drawback that the pavement surface is inferior in elasticity. The sheet pasting type and the floor-standing type have a drawback that they have a poor cushioning property although they are expensive. Further, there is a problem that water easily enters from the seams of the sheets and troubles such as swelling easily occur. In order to solve these problems of all weather type pavement materials, a site consisting of black rubber chips such as waste tires and window frames crushed black rubber chips or colored rubber chips crushed colored rubber and pigments such as valve pattern, and urethane binder Construction-type rubber chip pavement materials and mat-type or block-type pavement materials formed by pre-forming the rubber chip pavement material into a predetermined shape have been developed. When the rubber chip pavement material is laid on the base material and applied evenly, the urethane binder is hardened into a rubber by the humidity in the air, and the base material, the pavement material, and the rubber chips in the pavement material are firmly bonded to each other. Then, a colored paved surface having a porosity of about 10 to 30% is obtained. Since this pavement surface is well drained after rain, there is no trouble such as deformation or swelling of the pavement surface due to temperature change or freezing of invading water. or,
A general rubber such as a natural rubber or a butadiene rubber is often used for a tire which is a material of a black rubber chip, and a large amount of carbon black is kneaded. Therefore, the paved surface paved with the paving material of the present invention is excellent in abrasion resistance, cold resistance, impact resilience, and weather resistance, and has an appropriate elasticity. Therefore, if this pavement material is used for the path of a golf course, etc., a walking feeling similar to that of lawn can be obtained. Further, the tennis court and the land track paved with the paving material have elasticity similar to that of the clay court and the untaker, so that the athlete does not damage the muscles and joints. Moreover, the frictional resistance of the paved surface is almost the same as that of the asphalt paved surface, so even shoes with rubber soles will not slip.

[Problems to be solved] As described above, the above-mentioned pavement material has such excellent properties that it is ideal as an all-weather pavement material. In addition, there is also a feature that it is possible to obtain a color feeling extremely close to that of Antukar. However, even when the walking path of a golf course or the like is paved with the above pavement material, weeds and trees may grow on the pavement surface over the years. Not only is it unsightly if left unattended, but the roots of plants can destroy the pavement. An object of the present invention is to provide a pavement material that solves this problem.

The present invention relates to a paving material comprising a rubber chip, a urethane binder, a pigment and a root preventive agent.

Since the pavement material of the present invention has an action of suppressing the growth of roots of plants, it cannot grow even if seeds of plants fall on the surface paved with this pavement material. For this reason, weeds and small trees do not grow on the paved surface even after a long period of time after paving.
Further, the pavement material of the present invention, like the conventional rubber chip pavement material,
It has excellent abrasion resistance, cold resistance, and elasticity on the paved surface. Furthermore,
The paved surface is porous and easily drained after rainfall, and the friction resistance of the surface is almost the same as that of the asphalt paved surface, so even shoes with rubber soles will not slip. In addition, as the black rubber chip, a crushed waste tire can be used, so that it can be manufactured at low cost.

EXAMPLES In the pavement material of the present invention, the ratio of the rubber chips, the urethane binder, the pigment and the root repellent is preferably in the following range. The ratio of urethane binder to rubber chips is 10 per 100 parts by weight of the total amount of rubber chips.
˜50 parts by weight. The ratio of the pigment is 2.5 to 20 parts by weight based on 100 parts by weight of the urethane binder. If the urethane binder content is less than 10 parts by weight based on 100 parts by weight of the total amount of rubber chips, it becomes difficult to perform stirring and mixing with a mixer. Further, since the bonding strength between the rubber chips is low even after curing, there is a problem that the durability of the paved surface is poor. Further, when the urethane binder is more than 50 parts by weight, the voids between the rubber chips are filled with the urethane binder and the water permeability of the pavement surface is deteriorated. Also, since the porosity after curing becomes small, the paved surface becomes too hard,
It is not suitable for paving tennis courts. This is because playing on such a tennis court may damage muscles and joints. The ratio of the root repellent is 0.1 to 10 parts by weight, preferably 0.5 to 5 parts by weight per 100 parts by weight of the pavement material.
A range of parts by weight is suitable. The rubber chips, urethane binder, pigment, and root repellent used in the pavement material of the present invention will be described below. In the present invention, only black rubber chips or colored rubber chips may be used as the rubber chips, or both may be used in combination. Black rubber chips are carbon-containing rubber products, such as those obtained by crushing or cutting automobile tires, window frames, etc. to a prescribed particle size.
It is most preferable because it is excellent in weather resistance, mechanical strength, abrasion resistance, and inexpensive. The average particle size is preferably 10 mm or less, and particularly preferably 5 mm or less. Colored rubber chips are obtained by kneading a rubber such as butadiene rubber with a pigment and, if necessary, a specific antiaging agent or a filler such as calcium carbonate, talc, or white carbon, and crushing or cutting into chips. . The average particle size is 10 mm or less, like black rubber chips,
Above all, 5 mm or less is preferable. As the rubber used for the colored rubber chip, butadiene rubber, natural rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, isoprene rubber, diene rubber such as butyl rubber, hydrogenated above diene rubber, ethylene-propylene rubber, ethylene- Propylene-
Examples thereof include polyolefin rubbers such as diene copolymers, chlorinated polyethylene, chlorosulfonated polyethylene, soft vinyl chloride, polyurethane rubber, polyether rubber, and the like. Among these rubbers, the diene rubber is most preferable because it is excellent in abrasion resistance, cold resistance, and basic physical properties, and is inexpensive. However, since these rubbers have a problem in weather resistance as they are, it is necessary to add an antioxidant. As the anti-aging agent, dithiocarbamic acid type, amine type, ketone type and the like are used. These antioxidants may be used alone or in combination of several kinds. Among these antiaging agents, the dithiocarbamic acid antiaging agent is the most preferable in that it can greatly improve the weather resistance of the colored rubber chip and the degree of contamination is small. Any pigment can be used as long as it is usually used for coloring rubber. Among these, inorganic pigments and phthalocyanine pigments are preferable because they are excellent in light resistance, weather resistance and color retention. Examples include stalk, chrome green, zinc oxide, lithobon, titanium oxide, titanium white, barite, calcium carbonate, phthalocyanine green, phthalocyanine blue and the like. The pigment to be kneaded in advance in the colored rubber chip and the pigment added during stirring and mixing may be the same or different. However, from the viewpoint of appearance after paving, it is preferable to use the same pigment. It is suitable that the urethane binder becomes rubber-like after curing. If it is not rubbery after curing, the pavement surface will be too hard, which is not preferable for use in construction of leisure facilities such as tennis courts, athletic fields, golf course paths, amusement parks and the like. As the root repellent, any of those commonly used for roofing materials, putty tapes for sewer pipes, bitumen insulation, roofing felts, roof paints and the like can be used, and particularly preferred is phenoxy fatty acid. There are salts, phenoxy fatty acid esters, N, N′-dialkyltrifluoromethyldinitrophenylamine, acid hydrazides and the like. Examples of the phenoxy fatty acid salt include 2-methyl-4-chlorophenoxy calcium acetate. As the phenoxy fatty acid ester, for example, phenoxyacetic acid alkyl ester, phenoxyacetic acid phenol, phenoxyacetic acid polyethylene glycol ether ester and phenoxyacetic acid polypropylene glycol ether ester, such as phenoxyacetic acid polyglycol ether ester, tolyloxyacetic acid alkyl ester, tolyloxyacetic acid phenol,
Tolyloxyacetic acid polyglycol ether ester such as tolyloxyacetic acid polyethylene glycol ether ester and tolyloxyacetic acid polypropylene glycol ether ester, phenoxypropionic acid alkyl ester, phenoxypropionic acid phenol, phenoxypropionic acid polyethylene glycol ether ester and phenoxypropionic acid polypropylene glycol ether ester Phenoxypropionic acid polyglycol ether ester, chlorotolyloxypropionic acid polyglycol ether ester, 1-phenyloxypropionic acid polyglycol ether ester, 2-phenyloxypropionic acid polyglycol ether ester and the like are used. Examples of the N, N′-dialkyltrifluoromethyldinitrophenylamine include, for example:
There is N, N'-dipropyl-2,6-dinitro-4-trifluoromethylphenylamine (Dow Company trademark "Trifluralin"). As the acid hydrazide, 2-methyl-
Examples include 4-chlorophenoxyacetic acid hydrazide and maleic acid hydrazide. Among these, the most preferable one is chlorotolyloxypropionic acid polyglycol ether ester (trade name “Preventol B”, a trade name of Bayer Co.).
2 "), 2-methyl-4-chlorophenoxyacetic acid hydrazide, 2-methyl-4-chlorophenoxyacetic acid calcium, 2-methyl-4-chlorophenoxyacetic acid butyl, and maleic acid hydrazide. Next, a method for manufacturing the pavement material of the present invention will be described. The paving material of the present invention is
It can be produced by stirring and mixing a rubber chip, a urethane binder, a root preventive and a pigment with a mixer or the like. A normal construction mixer is used as the mixer. The stirring and mixing is preferably performed by a procedure in which the black rubber chips, the colored rubber chips, and the pigment are stirred and mixed, and then the urethane binder is added. The root preventive may be mixed in advance with the urethane binder, or may be mixed when the rubber chips, the urethane binder, and the pigment are mixed by stirring. Further, the rubber chips may be kneaded in advance. A construction method using the pavement material of the present invention will be described by taking a walking path of a golf course as an example. First, the base of asphalt concrete or concrete pavement is cleaned and dried. Next, a primer is applied, the paving material of the present invention is spread and leveled, the paved surface is finished flat with a register mark, a compaction roller, etc., and the urethane binder is allowed to cure at room temperature. After curing the urethane binder, a top coat layer of urethane or the like may be applied if necessary. When the pavement material of the present invention is laid on a base material and the surface is left evenly, the urethane binder is cured into a rubber by the humidity in the air, and the base material, the pavement material, and the rubber chips in the pavement material are firmly bonded to each other. .
Then, a colored paved surface having a porosity of about 10 to 30% is obtained. The groundwork is not limited to asphalt concrete pavement or concrete pavement surfaces. The surface can be paved with this paving material, such as crushed stone or iron plate, as long as it can firmly adhere to the urethane binder. Therefore, it can be used for pavement such as a promenade, a jogging course, a pedestrian bridge, etc. as well as a walkway of a tennis court, an athletic field, or a golf course. The pavement material of the present invention may be formed into a pavement mat or pavement tile in advance and used for pavement on a tennis court, a golf course, or an athletic field. The pavement mat can be produced by extruding the pavement material of the present invention into a sheet and curing it at room temperature or under heating. The thickness of the paving mat is preferably in the range of 1 to 50 mm. The width is 30 cm.
The range of 3 m is preferable. The paving tile can be manufactured by punching or cutting the paving mat with a cutter or the like. Further, the pavement material of the present invention may be poured into a mold to be cured. The thickness of the paving tile is preferably in the range of 1 to 50 mm. As the shape, square, rectangle, triangle,
Various shapes such as a pentagon, a hexagon, a polygon such as a star, a circle, an ellipse, a gourd shape, a cocoon shape, an oval shape, and a Roman letter I or L are possible. An example of the shape of this pavement tile is shown in FIGS. 1 and 2 of the accompanying drawings. FIG. 1 shows an example of the shape of the paving tile, and FIG. 2 shows a state in which the paving tile is applied. [Examples] Examples of the present invention will be shown below. Reference Example 1 Preparation of Black Rubber Chip and Colored Rubber Chip (i) Black Rubber Chip A waste tire was crushed to a particle size of 1 to 3 mm to obtain a black rubber chip. (ii) Preparation of colored rubber chips (a) Preparation of brick-colored rubber chips A butadiene rubber, a filler such as talc and white carbon, a pigment, an antioxidant, a vulcanizing agent and the like were kneaded in the proportions shown below. In addition, nickel dibutyldithiocarbamate was used as the anti-aging agent, and red iron oxide was used as the pigment. Butadiene rubber: 100 parts by weight Filling agent: 100 parts by weight Anti-aging agent: 2.0 parts by weight Facial agent: ..2.0 parts by weight Vulcanizing agent ..... 5.0 parts by weight This kneaded material was vulcanized to obtain vulcanized rubber chips having a particle size of 1 to 3 mm. (b) Preparation of Green Rubber Chips Butadiene rubber, fillers such as talc and white carbon, pigments, antioxidants, vulcanizing agents and the like were kneaded in the same proportions as the brick-colored rubber chips. A similar type was used for the anti-aging agent. Phthalocyanine green was used as the pigment. Butadiene rubber: 100 parts by weight Filling agent: 100 parts by weight Anti-aging agent: 2.0 parts by weight Facial agent: ..2.0 parts by weight Vulcanizing agent ..... 5.0 parts by weight This kneaded material was vulcanized to obtain vulcanized rubber chips having a particle size of 1 to 3 mm. Example 1 (1) Preparation of paving material. The above black rubber chips, brick-colored rubber chips, urethane binder, pigment, and root preventive agent were stirred and mixed in the following proportions to prepare a paving material. Benjime was used as the pigment, and chlorotolyloxypropionic acid polyglycol ether ester (Preventol B2 manufactured by Bayer) was used as the root repellent. The urethane binder has a tolylene diisocyanate content of 1 to 3% and an amine equivalent of 420 to 500,
Tolylene diisocyanate-based one-pack moisture-curing urethane was used. The formulation of the above pavement material is shown below. Black rubber chip: 95 parts by weight Brick color rubber chip: 5 parts by weight Urethane binder: 25 parts by weight Facial agent: 1.25 parts by weight Root preventive agent: ...・ ・ 2.0 parts by weight (2) Construction The golf course path was paved with the above pavement materials. The feeling of walking on the pavement was very good, similar to lawn. Weeds were not seen even after one year from paving. Example 2 The same as Example 1 except that green rubber chips were used in place of brick colored rubber chips, and maleic hydrazide (commercial product, purity 99%) was used in place of Bayenter's Preventol B2 as a root preventive agent. A paving material was prepared according to the recipe and the method, and a golf-like walking path was paved. The walking feeling on the pavement surface was very good, similar to that of lawn, and no weeds were seen even one year after paving. Comparative Example 1 A pavement material was prepared in the same manner as in Example 1 except that no root preventive agent was added, and a pavement path of a golf course was paved with this pavement material. One year after paving, weeds were growing on the paved surface.

Claims (1)

[Claims] 1. A rubber chip, a urethane binder, a pigment,
And a pavement material containing a root repellent.