JP2009203697A - Elastic paving material, its molding method, and elastic pavement and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastic paving material made of crushed-pulverized material of waste rubber parts, having a high sliding resistance, and having an improved aesthetic appearance. <P>SOLUTION: The elastic material formed by mixing large, middle, and small crushed pieces having a distribution amount Wt of grain sizes is adjusted to a predetermined value at a mixing ratio (Wt%) of (60-85):(0-40):(0-40) is mixed with a one-component polyurethane having a viscosity of 6,000-9,000 mPa s/25°C to form a mixture. The mixture is laid down on a general road surface, pressurized at a leveling pressure of (1.0-3.0)x10<SP>4</SP>Pa. and adhered-solidified at a thickness of 15-35 mm. Consequently, an elastic paved road having a water permeability of (1.0-2.0)x10<SP>-2</SP>cm/s, and a sliding resistance of 85 BPN (British Pendulum Number) or higher in dry state and 55 BPN or higher in wet state is provided by the mixture. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elastic pavement material and an elastic pavement using a crushed and pulverized material of waste rubber parts, and more particularly to an elastic pavement for guiding a racehorse.

  It is formed by mixing hard aggregate made of gravel, soft aggregate made of various rubber chips, etc., and resin for binder as an elastic pavement material for stadiums, grounds, running paths, or walking paths. Pavement materials are widely used because of their excellent weather resistance and easy maintenance after rain.

  As a conventional technique, in Patent Document 1 below, in an elastic pavement structure for a stadium, a ground, a running path, or a walking path, first, the surface to be paved is cured to a predetermined thickness smaller than the thickness of the entire pavement. Elasticity consisting of chips made by pulverizing removed urethane pavement material generated by renovation of existing urethane pavement, and chips crushed waste tires, etc. Repeat and finish the paving process to form the elastic chip-containing layer until the thickness of the entire pavement is reached by spreading and leveling the chip material in an excessive manner, and collecting the excess elastic chip material that did not adhere with a recovery machine An elastic pavement structure and construction method characterized in that at least two elastic tip-containing layers are bonded to each other are shown.

  Patent Document 2 listed below includes a hard aggregate made of gravel, ceramic pieces, etc., a soft aggregate made of rubber chips (particle size: 1.5 to 3 mm) obtained by pulverizing waste tires, and a binder resin. The hard aggregate is a large-diameter hard aggregate having a large particle size (equivalent to large gravel with a particle size of 10 to 5 mm) and the large-diameter hard aggregate. It consists of small-diameter hard aggregates with a small particle size (equivalent to small gravel of 5 to 2.5 mm), and is characterized in that large-diameter hard aggregates and small-diameter hard aggregates are blended at a weight ratio of about 2: 1. The paving material to be shown is shown.

Further, in Patent Document 3 below, a mixture of at least one elastic material selected from a fibrous rubber chip (hijiki rubber), a granular rubber chip, and a pulverized golf ball, which is laid on the foundation layer of the pavement construction surface, and a binder. A molded body obtained by curing is shown.
JP 2004-190441 A JP-A-8-165606 JP-A-9-273111

  However, the elastic pavement structure shown in the above-mentioned Patent Document 1 is an unspecified one of a size such as a removed urethane pavement material or an elastic chip material obtained by crushing waste tires generated in the repair work of the existing urethane pavement. Since it is used, the tensile strength and the Masatsu coefficient are not stable, the size of the rubber pieces appearing on the paved road surface is not specified, and there are difficulties in design properties (paving stone feeling, gloss, etc.). In addition, spread only the curable resin material to a predetermined thickness on the pavement surface, and then spread and smash the crushed elastic chip material overly before the curable resin material coating layer is cured, Finally, except for the elastic chip material buried and attached to the coating layer of the curable resin material, the troublesome work of repeating at least two operations of collecting the excess elastic chip material that did not adhere with a recovery machine is required. It is what.

  In addition, the paving material described in Cited Document 2 mainly uses hard aggregates made of gravel, ceramic pieces, etc., and the amount of soft material used by recycling waste tires is small. Although it has a high wear strength, it has poor elasticity and cannot fully meet the demand for recycling waste rubber parts for automobiles and the like.

  In addition, since the molded body described in the cited document 3 uses an elastic material whose size is not specified, such as fibrous rubber chips (hijiki rubber), granular rubber chips, and pulverized golf balls, the tensile strength and the mass coefficient are stable. Without being specified, the size of the rubber piece appearing on the paved road surface is not specified, and there is a difficulty in design.

  In addition, conventional paved roads laid with elastic pavement that is a mixture of small crushed pieces made of elastic chip material such as scrap tires and rubber chips and binders are used in places with high humidity and on the surface of pavements during the rainy season. There was also a problem that moss and algae grew, and the horseshoe of the competing horse slipped on the ramp laid on the guideway of the competing horse, preventing it from climbing uphill.

  The present invention has been made in view of such circumstances, and is used for recycling rubber for automobiles, etc., and has a high Masatsu coefficient and an excellent design, and an elastic pavement material and its molding method, particularly from stables to competitive roads. The object is to provide an elastic pavement that guides a racehorse and its construction method.

In order to solve the above problems, the first invention includes two or more elastic materials selected from large, medium, and small pieces of waste rubber parts selected by a plurality of sieves having different mesh sizes, It is an elastic pavement that has been spread and leveled by applying a mixture with a binder, leveled and solidified,
The maximum particle size of the large, medium and small crushed pieces is 20 mm or less in terms of the mesh size of the sieve, and the distribution amount (Wt) of each of the large, medium and small crushed pieces occupies 90% or more. The mesh size of the sieve is
Large fragments are more than 8.0 mm and less than 15.0 mm Medium fragments are more than 3.12 mm and less than 8.0 mm Small fragments are more than 1.0 mm and less than or equal to mm.
The mixing ratio (Wt%) of the large, medium and small crushed pieces is (60 to 85) :( 0 to 40) :( 0 to 40), and the sliding resistance value is 85 BPN (British Pendulum Number) in a dry state. ) Above, it is an elastic pavement characterized by being 55 BPN or more in a wet state.

  The particle size distribution amount (Wt) of each crushed piece is a weight occupied by the main particle size to be distributed, and it is mentioned that each crushed piece contains a part of other particle sizes close to these main particle sizes. Not too long.

  The thickness of the elastic pavement after solidification is determined by the purpose of use and the site of use. As an elastic pavement, a thickness of 15 mm or more is sufficient, and a thickness of 25 to 35 mm is preferable for increasing elasticity.

According to a second invention, in the first invention, the binder is a one-component polyurethane having a viscosity (6,000 to 9,000) mPa · s / 25 ° C. and has a water permeability of (1.0 to 2). 0.0) × 10 ⁻² cm / s.

  The binder is not limited to one-component polyurethane, and may be two-component polyurethane.

A third invention is the elastic pavement material according to the second invention, wherein the spreading pressure is (1.0 to 3.0) × 10 ⁴ Pa.

A fourth invention uses a mixture of an elastic material and a binder in which large, medium, and small crushed pieces according to the first invention are configured at a predetermined mixing ratio (Wt%), and the binder has a viscosity of One-pack type polyurethane of 6,000 to 9,000 mPa · s / 25 ° C, the leveling pressure is (1.0 to 3.0) × 10 ⁴ Pa, and the elastic pavement after bonding and solidification on the road surface The thickness is 15 to 35 mm, the water permeability is (1.0 to 2.0) × 10 ⁻² cm / s, and the slip resistance value is 85 BPN (British Pendulum Number) or more in a dry state and a wet state It is an elastic pavement for guiding a racehorse characterized by being at least 55 BPN.

A fifth invention uses a mixture of an elastic material and a binder in which the large, medium, and small crushed pieces according to the first invention are composed of a predetermined mixing ratio (Wt%), and the binder has a viscosity ( 6,000-9,000) mPa · s / 25 ° C. one-component polyurethane, spread pressure is (1.0-3.0) × 10 ⁴ Pa, and water permeability is (1.0- 2.0) × 10 ⁻² cm / s, and a slip resistance value is 85 BPN (British Pendulum Number) or more in a dry state, and 55 BPN or more in a wet state. is there.

A sixth invention uses a mixture of an elastic material and a binder in which large, medium, and small crushed pieces according to the first invention are composed of a predetermined mixing ratio (Wt%), and the binder has a viscosity of One-pack type polyurethane of 6,000 to 9,000 mPa · s / 25 ° C, leveling pressure of (1.0 to 3.0) × 10 ⁴ Pa, elastic pavement after solidifying and solidifying on the road surface The thickness is 15 to 35 mm, the water permeability is (1.0 to 2.0) × 10 ⁻² cm / s, the slip resistance value is 85 BPN (British Pendulum Number) or more in the dry state, and 55 in the wet state. It is the construction method of the elastic pavement for competitive horse guidance characterized by being more than BPN.

In the first invention, a mixture of two or more kinds of elastic materials selected from large, medium and small crushed pieces of waste rubber parts selected with a plurality of sieves having different mesh sizes and a binder is spread and leveled. The elastic pavement is leveled and solidified by applying pressure, and the maximum particle size of the large, medium and small crushed pieces is 20 mm or less in terms of the mesh size of the sieve, the large, medium and small The size of the mesh of the sieve in which the distribution amount (Wt) of each particle size of each crushed piece is 90% or more,
Large fragments are more than 8.0 mm and less than 15.0 mm Medium fragments are more than 3.12 mm and less than 8.0 mm Small fragments are more than 1.0 mm and less than 3.12 mm,
The mixing ratio (Wt%) of the large, medium and small crushed pieces is (60 to 85) :( 0 to 40) :( 0 to 40), and the sliding resistance value is 85 BPN (British Pendulum Number) in a dry state. ) As mentioned above, since it is an elastic pavement characterized in that it is 55 BPN or higher in a wet state, it is used for recycling of waste rubber parts used for automobiles, etc., and an elastic pavement made of crushed pieces of an appropriate size The slip resistance value (both dry and wet) is high due to the unevenness of the surface of the chip and the unevenness of the connection part of the crushed pieces, and the water permeability caused by the gaps between the large, medium, and small crushed pieces is particularly slippery when wet It is possible to provide an elastic pavement material that has a high resistance value and that is glossy and has a good design that looks and feels like a cobblestone due to the appropriate size and balance of the crushed pieces.

Further, in a second invention according to the first invention, the binder is a one-component polyurethane having a viscosity (6,000 to 9,000) mPa · s / 25 ° C. and has a water permeability of (1.0). ~ 2.0) × 10 ^-2 cm / s is an elastic pavement material, so that the binder adheres to the surface of large, medium, and small crushed pieces as necessary and sufficiently, such as tensile strength. Required mechanical strength and water permeability caused by voids formed between large, medium, and small pieces are ensured. In addition, a urethane film is formed on the surface, and the design is improved in combination with an appropriate size and balance of the crushed pieces. Furthermore, there is an effect that adhesion to the surface of the roller of the pressure machine is reduced and workability is improved.

The third invention is the elastic pavement material according to the second invention, in which the spreading pressure is (1.0 to 3.0) × 10 ⁴ Pa, so that a necessary gap is secured inside. There is an effect that water permeability is not impaired.

Further, a fifth invention uses a mixture of an elastic material and a binder in which large, medium, and small crushed pieces according to the first invention are configured with a predetermined mixing ratio (Wt%), and the binder includes: It is a one-component polyurethane with a viscosity of (6,000 to 9,000) mPa · s / 25 ° C., and the leveling pressure is (1.0 to 3.0) × 10 ⁴ Pa and the water permeability is (1.0 to 2.0) × 10 ⁻² cm / s, and a sliding resistance value is 85 BPN (British Pendulum Number) or more in a dry state and 55 BPN or more in a wet state Because it is a method for molding pavement materials, it is used for recycling of waste rubber parts used for automobiles, etc., and slips due to irregularities on the surface of elastic pavement materials made of crushed pieces of appropriate size and unevenness of connecting parts of crushed pieces High resistance (both dry and wet), caused by gaps between large, medium and small pieces A method of forming an elastic pavement that is highly slippery, especially when wet, and has an excellent design that is glossy and looks like a cobblestone due to the appropriate size and balance of the fragments. Can be provided.

Further, the fourth invention uses a mixture of an elastic material and a binder in which large, medium, and small crushed pieces according to the first invention are configured with a predetermined mixing ratio (Wt%), and the binder includes: It is a one-component polyurethane having a viscosity of (6,000 to 9,000) mPa · s / 25 ° C., and the spreading pressure is (1.0 to 3.0) × 10 ⁴ Pa. The thickness of the elastic pavement after adhesion and solidification on the road surface is 15 to 35 mm, the water permeability is (1.0 to 2.0) × 10 ⁻² cm / s, and the slip resistance value is in a dry state. 85 BPN (British Pendulum Number) or more, 55 BPN or more in a wet state, characterized in that it is an elastic pavement for guiding a racehorse, and the sixth invention is the construction of the elastic pavement according to the fourth invention This method is excellent in mechanical properties such as tensile strength and tear strength, mechanical properties such as elasticity and damping properties, and design properties. Due to its good water quality, even if it is used in a wet state for a long period of time, it does not grow moss or algae, and is friendly to competitive horses. A construction method can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory view of a cross section of an elastic pavement according to an embodiment of the present invention. In FIG. 1, 100 is an elastic pavement material, 10 is a large crushed piece of waste rubber parts used in automobiles and the like (distribution distribution of crushed pieces with a mesh size of more than 8.0 mm and less than 15.0 mm) (Wt) is 90% or more), 20 is the crushed pieces in waste rubber parts for automobiles (size distribution of crushed pieces with a mesh size of more than 3.12 mm and less than 8.0 mm) (Wt) is 90% or more), 30 is a small crushed piece of waste rubber parts for automobiles etc. (size distribution of the crushed piece with a mesh size of more than 1.0 mm and less than 3.12 mm) The amount (Wt) is 90% or more), and is obtained by crushing and crushing from a tread portion of a waste tire, an automobile window frame rubber part, etc., and then screening through a sieve.

  This elastic pavement shows a cross section when paved on an existing paved road surface, the upper surface (A) is the surface of the paved road, and the lower surface (B) is an adhesive surface to the existing paved road surface. The thickness is about 20 mm, but may be increased or decreased appropriately depending on the place of use and purpose of use. If it is thin, the elasticity is lowered and the walking feeling is hard, and if it is thick, the elasticity is increased, but the fluffy feeling is strong and the paved road is preferably 15 to 35 mm.

  Reference numeral 40 denotes a binder made of one-component polyurethane applied to the surface of the large, medium, and small crushed pieces, and also displays the outline of the large, medium, and small crushed pieces. Reference numeral 50 denotes a space (a portion indicated by hatching in the figure) occupied between the large, medium, and small pieces.

  Large, medium, and small fragments are bonded to each other by the binder 40, and a part of the internal space 50 communicates with the atmosphere through the other space, and a part of the rainfall and flood water is drained through this space. Good water permeability.

  In addition, the elasticity and damping properties of the elastic pavement material are determined by the characteristics of the large, medium and small fragments themselves and the gap. For this reason, a paved road paved with this elastic paving material has moderate elasticity and damping as compared with an asphalt paved road.

  The higher the ratio of small crushed pieces, the larger the contact area between the crushed pieces, which increases the adhesive strength between the crushed pieces and adds the strength of the binder itself, such as the tensile strength of elastic pavement. Strength increases. On the contrary, when the ratio of the large crushed pieces is high, the contact area between the crushed pieces becomes small, the adhesive force between the crushed pieces is lowered, and the mechanical strength such as the tensile strength of the elastic pavement is lowered.

  One end face of the large shredded piece faces the surface, and medium and small shredded pieces are buried and arranged in an orderly manner in the gap between the large shredded pieces, giving a paving sensation, and further, a urethane binder film on the flat surface As a result of the formation of luster, gloss is produced and the appearance is improved and the design is improved.

  When the ratio of the large crushed pieces is high, the voids are increased and the water permeability is increased. When the ratio of the large crushed pieces is low, and when the ratio of the small crushed pieces is high, the voids are decreased, so that the water permeability is lowered. When the water permeability is high, the slip resistance value when wet is increased, and when the water permeability is low, the slip resistance value when wet is decreased.

  On the other hand, the sliding resistance value during drying is due to the degree of the degree of catching on the surface of the elastic pavement, and the higher the ratio of small crushed pieces, the smaller the catching value and the smaller the sliding resistance value, and the larger crushed piece ratio is. The higher the value, the larger the catch and the larger the slip resistance value.

  When the viscosity of the urethane binder becomes too high, the urethane binder becomes polka dots on the surface of the elastic pavement material and solidifies, so that the gloss is lowered and the design is impaired. On the other hand, if the viscosity of the urethane binder becomes too low, the urethane binder hangs down, increasing the gap between large, medium, and small crushed pieces and increasing the water permeability. Decreases, and mechanical strength such as tensile strength decreases. On the other hand, if the viscosity of the urethane binder is too high, when the elastic pavement is paved, the crushed pieces coated with the urethane binder adhere to the roller surface of the compactor, leading to a reduction in the efficiency of construction work.

If the leveling pressure is too high, the internal voids will be small and the water permeability will be reduced.If the pressure is too low, the smoothness of the surface will be impaired and the design will be reduced. The bonding area is reduced, and the mechanical strength such as tensile strength and tear strength is reduced, so that (1.0 to 3.0) × 10 ⁴ Pa is preferable.

  Although the crushed pieces can be produced from various types of waste rubber parts, it is preferable to use those having excellent strength and weather resistance, such as automobile waste tires and window frame parts.

  Next, the construction method of the elastic pavement according to the present invention will be described.

  FIG. 2 is an explanatory diagram of a method for constructing an elastic pavement according to the embodiment of the present invention. In FIG. 2, steps 1 to 7 are steps for producing a mixture of an elastic pavement material and a binder composed of large, medium and small pieces, and the next steps 8 to 10 are steps 1 to 6. It is a process of constructing a mixture on a general road surface.

  Step 1 (cutting): The collected waste tire or the like is cut with a cutting machine.

  Not only waste tires but also various waste rubber parts for automobiles can be used. In the case of a waste tire, the type is not limited, but a tire having a large amount of rubber in the tread portion is preferable. In addition, this process can be omitted depending on the type of the waste rubber part.

  Step 2 (crushing / crushing): The waste tires cut in step 1 are put on a crusher / crusher to crash.

  Depending on the type of waste rubber parts, this step includes a step of separating into rubber and other fibers, metals, and the like.

  Step 3 (Sieving Step): The crushed pieces crashed in Step 2 are applied to a plurality of different mesh meshes and sorted into three types of large, medium and small pieces. In addition, the thing which is not sieved off from the mesh of a large sieve returns to process 2, and crushes and grinds again.

  Step 4 (combination combination): The large, medium and small crushed pieces obtained in step 3 are combined and blended at a predetermined mixing ratio (Wt%).

  The mixing ratio of the large, medium, and small crushed pieces is (60 to 85) :( 0 to 40) :( 0 to 40) in weight ratio.

  Step 5 (Pretreatment): In order to stabilize the adhesive strength of the binder added in the next step, the rubber surface is activated by adding a pretreatment agent to the combination / blending material obtained in Step 4.

  Step 6 (Binder addition): A binder is added to the combination / compounding material activated in Step 5 to obtain a mixture of an elastic material and a binder composed of large, medium, and small pieces.

  The binder is a one-component polyurethane that has a viscosity of (6,000 to 9,000) mPa · s / 25 ° C. by adding a thickener.

  Step 7 (stirring): The binder added in step 6 is uniformly adhered to all the surfaces of the large, medium, and small crushed pieces, and stirred so that the distribution of the large, medium, and small crushed pieces becomes uniform. .

  Step 8 (laying and leveling): The mixture after stirring in step 7 is spread on the existing paved road surface and leveled. Before spreading and leveling the elastic pavement material, the pavement road surface is cleaned, a primer is applied, and after drying, a necessary amount of binder is applied on the primer.

Step 9 (Pressurization): The mixture spread in Step 8 is pressurized with a compactor. The leveling pressure is (1.0 to 3.0) × 10 ⁴ Pa.

  Step 10 (curing): Finally, curing is performed. The curing time is preferably 10H or more in summer and 20H or more in winter.

  As described above, the case where the mixture obtained by adding a binder to the elastic material composed of large, medium, and small crushed pieces and stirring the mixture is spread on the pavement surface to form an elastic pavement. It is not limited to the construction method, and is long (for example, width 1.2 to 1.8 m × length 10 to 20 m × thickness 20 to 30 mm), short (for example, length 30 to 40 cm × width 30 ~ 40cm x thickness 15-50mm) as a molded body, and at the end, a decorative frame (also protective frame) made of resin etc. shall be provided to replace the walking path, running path, garden paving stone, etc. You can also.

(1) Designability First, the designability was evaluated, and the specifications of large, medium and small pieces were determined. One-part polyurethane having a viscosity of 8,000 mPa · s / 25 ° C. is added to large, medium, and small crushed pieces having different central particle sizes, and the leveling pressure is set to 1.5 to 2.0. ) × 10 ⁴ Pa, 20 types of elastic pavement having dimensions of 15 cm in length, 15 cm in width, and 20 mm in thickness were produced and visually evaluated by 10 panelists.

  As a result, the large crushed pieces have a mesh size of more than 8.0 mm and less than 15.0 mm, and the particle size distribution (Wt) of the crushed pieces is 90% or more. The particle size distribution (Wt) of the crushed pieces with a mesh size of more than 3.12 mm and less than 8.0 mm is 90% or more, and the small crushed pieces have a mesh size of more than 1.0 mm. It was confirmed that a mixture of three kinds having a particle size distribution (Wt) of 90% or more with a predetermined ratio of not more than 3.12 mm had a high evaluation of designability as a paving stone.

(2) Specification of elastic pavement material (a) Large, medium and small crushed pieces Based on the above-mentioned evaluation results of design properties, large, medium and small crushed pieces in Examples (including comparative examples) are distributed in particle size. The amount (Wt) shown in Table 1 was used.

(b) Binder A thickener (NBDA, manufactured by Mitsui Chemicals, Inc.) was added to Hyprene AX-870, a binder manufactured by Mitsui Chemicals Polyurethane, and the viscosity was adjusted before use. The large, medium, and small crushed pieces were pretreated using a necessary and sufficient amount of pretreatment agent in order to increase the adhesion reliability of the binder.
(C) Spreading pressure (1.5 to 2.0) × 10 ⁴ Pa.
(D) Use amount of crushed pieces (gap specific gravity)
It was set to 4500 N / m ³ .

(3) Mechanical properties (a) Tensile strength / elongation rate ・ Tensile testing machine: Universal tensile testing machine (AG-B type) manufactured by Shimadzu Corporation
・ Test piece: JIS K-6251 Dumbbell No. 3 type (b) Tear strength ・ Tear tester: Universal tensile tester (AG-B type) manufactured by Shimadzu Corporation
・ Test piece: JIS K-6252 No-cut angle type (c) Slip resistance
-Measuring instrument: British pendulum type slip resistance tester-Test method: ASTM E303
・ Slip resistance (unit): BPN (British Pendulum Number)
Test piece: 50cm long x 50cm wide x 25mm thick
(D) Permeability-Measuring instrument: Kansai Kikai Seisakusho Co., Ltd. On-site permeability tester-Test method: On-site permeability test method (JHS 233)
Test piece: 50cm long x 50cm wide x 25mm thick

Table 2 shows the design properties and mechanical properties of the examples and comparative examples. In Example 1, the mixing ratio (Wt%) of the crushed pieces was 75: 12.5%: 12.5%, and the viscosity of the urethane binder was 8,000 mPa · s / 25 ° C. This is a standard specification of the present invention. Tensile strength 0.96 MPa, elongation 70%, tear strength 13.2 N / mm, water permeability 1.5 × 10 ⁻² cm / s, sliding resistance value 100 (when dry), 68 (when wet). The physical property value of the sample also cleared the specified value, and the design property was also good.

  In contrast, Comparative Example 1 has the same mixing ratio (including particle size distribution) of large, medium, and small crushed pieces as Example 1, but without adding a thickener to the binder, the viscosity of the binder. Is 3,000 mPa · s / 25 ° C. Therefore, the viscosity of the binder is low, the binder hangs down between the crushed pieces, the tensile strength, the elongation rate, and the tear strength do not reach the specified values, and the tread of the crushed pieces (especially the surface side) does not work and the sliding resistance value is low. . Furthermore, a film made of a binder is not sufficiently formed on the surface of the elastic pavement material, the gloss is insufficient, and the design property evaluation is low.

In Example 2, the mixing ratio (Wt%) of large, medium, and small crushed pieces was set to 75: 25: 0, and the mixture of only two large and medium crushed pieces was used. 8,000 mPa · s / 25 ° C., the same as in the case of 1. Although the water permeability increased from 1.5 × 10 ⁻² cm / s in Example 1 to 2.0 × 10 ⁻² cm / s, other physical properties are not significantly different from those in Example 1.

In Example 3, the mixing ratio (Wt%) of large, medium, and small crushed pieces was set to 72:14:14, and the mixing ratio (Wt%) of large crushed pieces of Example 1 was slightly reduced. The mixing ratio (Wt%) of small crushed pieces is slightly increased. Although the water permeability slightly decreased from 1.5 × 10 ⁻² cm / s in Example 1 to 1.1 × 10 ⁻² cm / s, other mechanical properties are close to those in Example 1.

In Example 4, the mixing ratio (Wt%) of large, medium, and small pieces was 71: 0: 29. Compared with Example 3, the inside pieces were roughly shaken into small pieces. The viscosity of the binder is lowered from 8,000 mPa · s / 25 ° C. to 7,000 mPa · s / 25 ° C. Compared to Example 3, the mixing ratio (Wt%) of small crushed pieces is increased, but since the viscosity of the binder is reduced, the water permeability is from 1.1 × 10 ⁻² cm / s to 1 Rather, it increases to 0.5 × 10 ⁻² cm / s, which is the same value as the standard specification of Example 1. Other mechanical properties are slightly lower than in Example 3.

In Comparative Example 2, the mixing ratio (Wt%) of large, medium, and small crushed pieces was the same as in Example 4, and the viscosity of the binder was changed from 7000 mPa · s / 25 ° C. to 12,000 mPa · s / 25 in Example 4. Increased to ° C. The water permeability is extremely reduced to 0.3 × 10 ⁻² cm / s. Due to the high viscosity of the binder, the binder is not evenly distributed throughout the crushed pieces, the tensile strength and tear strength are low, and the binder is solidified in the form of polka dots on the upper surface of the elastic pavement. It is considered that the slip resistance value (during wetness and dryness) was relatively high due to the binder solidified in the form of polka dots. Moreover, the designability is impaired by the binder solidified in the form of polka dots on the surface.

  In Example 5, the mixing ratio (Wt%) of large crushed pieces was reduced from 72% to 60% compared to Example 3, and the equivalent was allocated to medium and small crushed pieces. The mixing ratio (Wt%) of each piece was increased from 14% to 20%, and the viscosity of the binder was increased from 8,000 mPa · s / 25 ° C. in Example 3 to 8,400 mPa · s / 25 ° C. .

  The mechanical properties of Example 5 are not much different from Example 3. In this example, the viscosity of the binder is increased simultaneously with the change of the mixing ratio (Wt%) of large, medium and small crushed pieces, and the influence of the viscosity of the binder cannot be ignored. The effect of changing the mixing ratio (Wt%) of medium and small crushed pieces on the mechanical properties is not so great.

  Example 6 is different from Example 4 in that the mixing ratio (Wt%) of large, medium, and small crushed pieces was changed from 71: 0: 29 to 83: 0: 17. Increased mixing ratio (Wt%), decreased mixing ratio of small crushed pieces (Wt%), and reduced binder viscosity from 7,000 mPa · s / 25 ° C to 6,500 mPa · s / 25 ° C However, the mechanical properties are close to those of Example 4, and all the physical properties clear the specified values.

  In Comparative Example 3, the mixing ratio (Wt%) of large, medium, and small crushed pieces was 71: 0: 29, and the binder viscosity was 7,000 mPa · s / 25 ° C. The ratio (Wt%) is the same as the viscosity of the binder, and the amount of binder used (ratio to the weight of large, medium, and small crushed pieces (Wt%)) is reduced from 18% in Example 4 to 7%. However, in Comparative Example 3, since the amount of the binder used is small, the mechanical strength is low, the surface is not glossy, and the design property is also impaired. The amount of binder used (ratio to the total weight of large, medium and small crushed pieces (Wt%)) is preferably 15 to 25%.

In Comparative Example 4, the mixing ratio (Wt%) of large, medium, and small crushed pieces was set to 0:83:17, and only the medium and small crushed pieces were blended. Although the tensile strength and tear strength are cleared to the specified values, the catch on the surface of the elastic pavement is reduced, and the slip resistance value during drying is reduced. Further, the water permeability is as low as 0.3 × 10 ⁻² cm / s, and accordingly, the slip resistance value when wet is low. Furthermore, since large fragments are not included, the sense of paving stones is reduced and the design is impaired.

  The large, medium and small crushed pieces according to this example are the same lot, but the large, medium and small crushed pieces are crushed and crushed from various waste rubber parts. It is necessary to allow certain variations in character.

It is explanatory drawing of the cross section of the elastic pavement which concerns on embodiment of this invention. It is explanatory drawing of the construction method of the elastic pavement which concerns on embodiment of this invention.

Explanation of symbols

100 ・ ・ Elastic pavement material 10 ・ ・ Large crushing piece 20 ・ ・ Medium crushing piece 30 ・ ・ Small crushing piece 40 ・ ・ Binder 50 ・ ・ Void

Claims (6)

Spread a mixture of two or more kinds of elastic materials selected from large, medium and small pieces of waste rubber parts selected by multiple sieves with different mesh sizes and a binder, and apply pressure to level the mixture. Elasticized and solidified elastic paving material,
The maximum particle size of the large, medium, and small crushed pieces is 20 mm or less in terms of the mesh size of the sieve, and the distribution amount (Wt) of each particle size of the large, medium, and small crushed pieces is 90% or more, respectively. The mesh size of the sieve that occupies
Large fragments are more than 8.0 mm and less than 15.0 mm Medium fragments are more than 3.12 mm and less than 8.0 mm Small fragments are more than 1.0 mm and less than 3.12 mm,
The mixing ratio (Wt%) of the large, medium and small crushed pieces is (60 to 85) :( 0 to 40) :( 0 to 40), and the sliding resistance value is 85 BPN (British Pendulum Number) in a dry state. ) Above, an elastic pavement characterized by being 55 BPN or more in a wet state. The binder is a one-component polyurethane having a viscosity (6,000 to 9,000) mPa · s / 25 ° C., and the water permeability is (1.0 to 2.0) × 10 ⁻² cm / s. The elastic pavement according to claim 1. The elastic pavement according to claim 2, wherein the leveling pressure is (1.0 to 3.0) × 10 ⁴ Pa. Spread a mixture of two or more kinds of elastic materials selected from large, medium, and small pieces of waste rubber parts selected by multiple sieves with different mesh sizes and a binder on an existing road surface, It is an elastic pavement that is leveled by applying pressure and bonded and solidified,
The maximum particle size of the large, medium, and small crushed pieces is 20 mm or less in terms of the mesh size of the sieve, and the distribution amount (Wt) of each particle size of the large, medium, and small crushed pieces is 90% or more, respectively. The mesh size of the sieve that occupies
Large fragments are more than 8.0 mm and less than 15.0 mm Medium fragments are more than 3.12 mm and less than 8.0 mm Small fragments are more than 1.0 and less than 3.12 mm
The mixing ratio (Wt%) of the large, medium, and small crushed pieces is (60 to 85) :( 0 to 40) :( 0 to 40), and the binder has a viscosity of (6,000 to 9,9). 000) mPa · s / 25 ° C. one-component polyurethane, and the pressure of the spreader is (1.0 to 3.0) × 10 ⁴ Pa,
The thickness of the elastic pavement after adhesion and solidification on the existing road surface is 15 to 35 mm, the water permeability is (1.0 to 2.0) × 10 ⁻² cm / s, and the slip resistance value is dry. An elastic pavement for guiding competitive horses, characterized in that it is 85 BPN (British Pendulum Number) or more in the state and 55 BPN or more in the wet state. Spread a mixture of two or more kinds of elastic materials selected from large, medium and small pieces of waste rubber parts selected by multiple sieves with different mesh sizes and a binder, and apply pressure to level the mixture. A method for forming an elastic paving material that is solidified and solidified,
The maximum particle size of the large, medium, and small crushed pieces is 20 mm or less in terms of the mesh size of the sieve, and the distribution amount (Wt) of each particle size of the large, medium, and small crushed pieces is 90% or more, respectively. The mesh size of the sieve that occupies
Large fragments are more than 8.0 mm and less than 15.0 mm Medium fragments are more than 3.12 mm and less than 8.0 mm Small fragments are more than 1.0 mm and less than 3.12 mm,
The mixing ratio (Wt%) of the large, medium, and small crushed pieces is (60 to 85) :( 0 to 40) :( 0 to 40), and the binder has a viscosity of (6,000 to 9,9). 000) mPa · s / 25 ° C., one-component polyurethane, and the spread pressure is (1.0 to 3.0) × 10 ⁴ Pa and the water permeability is (1.0 to 2.0). × ¹⁰ -2 is cm / s, and the slip resistance value is 85 BPN (British Pendulum Number) in the dry state or more, the molding method of the elastic pavement material, characterized in that in the wet state is 55 BPN more. Spread a mixture of two or more kinds of elastic materials selected from large, medium and small pieces of waste rubber parts selected by multiple sieves with different mesh sizes and a binder on the road surface, and adjust the pressure. In addition, it is a method of constructing an elastic pavement that is leveled, bonded and solidified,
The maximum particle size of the large, medium and small crushed pieces is the size of the mesh of the sieve, and the maximum particle size is 20 mm or less, and the distribution amount (Wt) of each particle size of the large, medium and small crushed pieces is The mesh size of the sieve occupying 90% or more is
Large fragments are more than 8.0 mm and less than 15.0 mm Medium fragments are more than 3.12 mm and less than 8.0 mm Small fragments are more than 1.0 mm and less than 3.12 mm,
The mixing ratio (Wt%) of the large, medium, and small crushed pieces is (60 to 85) :( 0 to 40) :( 0 to 40), and the binder has a viscosity of (6,000 to 9,9). 000) mPa · s / 25 ° C, one-pack type polyurethane, the spread pressure is (1.0-3.0) × 10 ⁴ Pa, and the elastic pavement is bonded and solidified on the existing road surface. The thickness is 15 to 35 mm, the water permeability is (1.0 to 2.0) × 10 ⁻² cm / s, and the slip resistance value is 85 BPN (British Pendulum Number) or more in a dry state and in a wet state. 55. A method for constructing an elastic paved road for guiding a racehorse characterized by being at least BPN.

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