KR20150023067A - Pavement structure and method for producing same - Google Patents

Abstract

The packaging structure 1 comprises a binder layer 2 formed on the packaging surface 10a of the road and formed of an epoxy resin, a hard aggregate 3 partially embedded in the binder layer 2, And a topcoat layer 5 covering the binder layer 2, the hard aggregate 3 and the particle-bearing elastic aggregate 4. The topcoat layer 5 is formed of a base material, The hard aggregate 3 is formed of an electric furnace water-cooled slag aggregate and the particle-supported elastic aggregate 4 is formed by fixing hard particles 42 on the surface of the elastic core 41 with an adhesive 43. The particle-supported elastic aggregate 4 is formed of a rubber chip, the hard particles 42 are formed of a mixed powder of calcium carbonate and black carbon, and the adhesive 43 is formed of a urethane-based adhesive. The top coat layer 5 is formed of an acrylic resin.

Description

TECHNICAL FIELD [0001] The present invention relates to a pavement structure,

The present invention relates to, for example, a packaging structure provided on a packaging surface of an automobile road to improve the function of the packaging, and a manufacturing method thereof.

Conventionally, various functions such as a freezing prevention function, a shock absorption function, a slip prevention function, a noise suppression function, and the like have been added to various packages such as automobile road packaging, various stadium packaging, and pedestrian- A packaging structure having suitable elasticity is applied.

For example, a structure has been proposed in which a packaging material containing elastic aggregate is placed on a packaging surface to prevent freezing of the packaging surface in order to prevent slip accidents or the like caused by freezing of the packaging of roads. For example, in Patent Document 1, a binder containing a urethane-based resin is applied on a packaging surface, a rubber chip made of natural rubber and a hard magnetic aggregate are dispersed on the binder, a top coat containing a urethane- And the formed package structure is described. This packaging structure causes warpage on the surface portion of the package due to the elasticity of the rubber chip as the load of the vehicle acts, thereby breaking the ice formed on the packaging surface to peel off, thereby exhibiting the effect of inhibiting freezing. In the packaging structure of Patent Document 1, a rubber chip and a hard magnetic aggregate are dispersed on a binder material immediately after being applied on a packaging surface, a rubber chip and a hard magnetic aggregate are attached to a binder material before curing, The chip and the hard magnetic aggregate are fixed to the binder.

On the other hand, as a package for a sports facility, a packaging structure formed by installing a packaging material using elastic aggregate such as rubber on a packaging surface is proposed in order to alleviate an impact on an athlete. For example, in the packaging structure described in Patent Document 2, the elastic aggregate containing the hard aggregate containing the high hardness resin and the rubber-like elastic body is mixed with the binder such as urethane rubber to form the packaging material, On a primer layer made of polyurethane. Such an elastic packaging structure is applied to a pedestrian-exclusive road such as a promenade, a cart road of a golf course, etc. in addition to an athletic field.

Japanese Patent Application Laid-Open No. 2009-263997 Japanese Patent Application Laid-Open No. 2001-172436

The packing structure disclosed in Patent Document 1 has a specific gravity of the rubber chip smaller than the specific gravity of the binder while a specific gravity of the hard magnetic aggregate is larger than the specific gravity of the binder so that when the rubber chip and the hard magnetic aggregate are scattered on the binder material , The hard magnetic aggregate tends to sink in the binder material, while the rubber chip hardly sinks in the binder material. 4, the hard magnetic aggregate 13 is embedded in the binder 12 to the vicinity of the packaging surface 10a and fixed to the binder 12, but the rubber chip 14 is fixed to the binder 12 It is likely to remain near the surface and become insufficiently fixed to the binder 12. As a result, the conventional packaging structure has a problem that the rubber chip 14 is likely to fall off along with the passage of the vehicle, and the freeze suppressing effect is liable to be lost.

On the other hand, since the packaging structure described in Patent Document 2 is formed by laying a packaging material formed by mixing the hard aggregate and the elastic aggregate with a binder on the primer layer, the problem of the elastic aggregate dropping out is less than in the packaging structure of Patent Document 1, And the specific gravity difference between the elastic aggregate and the elastic aggregate is large, the mixture of the hard aggregate and the elastic aggregate tends to become uneven. As a result, there is a problem that deviation occurs between the hard aggregate and the elastic aggregate in the planar direction of the pavement structure, and the shock-absorbing function tends to be easily deviated.

Accordingly, an object of the present invention is to provide a packaging structure having high durability and capable of stably and uniformly exhibiting the function of the elastic aggregate.

In order to solve the above problems, the packaging structure of the present invention comprises a binder layer provided on a packaging surface,

A mixed aggregate in which a particle-supported elastic aggregate in which hard particles are supported on the surface of an elastic core material and a hard aggregate are mixed, and the particle-supported elastic aggregate and the hard aggregate are uniformly arranged in the depth direction,

The binder layer, and the topcoat layer covering the mixed aggregate.

According to the above configuration, as the load acts on the packaging structure, the particle-bearing elastic aggregate of the mixed aggregate is elastically deformed, and warping occurs in the packaging structure. Thus, for example, when the packaging structure is installed on the road, the ice on the packaging structure is destroyed and peeled, and freezing of the road is suppressed. Further, the impact when the wheels of the vehicle come into contact with the package structure is alleviated, and noise accompanying the running of the vehicle is suppressed. Further, for example, when the packaging structure is installed in a package such as an athletic field, the impact when each part of the player touches the packaging structure is alleviated, and the player is prevented from being injured. Here, since the particle-supported elastic aggregate is formed by supporting hard particles on the surface of the elastic core material, it has a larger specific gravity than that of the conventional rubber chip made of natural rubber and has high wettability with the binder material that is the material of the binder layer. Therefore, in the manufacturing process, the particle-supported elastic aggregate can be submerged in the binder material to reach the vicinity of the packaging surface, and the particle-supported elastic aggregate and the hard aggregate can be uniformly arranged in the depth direction to be fixed to the binder layer . Therefore, since the particle-bearing elastic aggregate and the hard aggregate can be fixed to the binder layer with the same strength, it is possible to effectively prevent the drop of the particle-bearing elastic aggregate accompanying the use of the packing structure, have. Further, since the difference in specific gravity between the particle-bearing elastic aggregate and the hard aggregate is relatively small, the mixed aggregate is homogeneously mixed and uniformly mixed with each other. Therefore, since the particle-bearing elastic aggregate of the mixed aggregate and the hard aggregate are uniformly arranged in the plane direction of the binder layer, a homogeneous function without deviation in the planar direction can be exhibited. As described above, according to the present invention, it is possible to obtain a packaging structure that has high durability and can stably exhibit a freeze suppression function, a slip prevention function, a noise suppression function, and an impact relaxation function. The fact that the particle-supported elastic aggregate and the hard aggregate are uniformly arranged means that the same kind of aggregate does not aggregate in the depth direction or the plane direction and the particle-bearing elastic aggregate and the hard aggregate are mixed and arranged. For example, when the mixed aggregate is disposed at a thickness of substantially one particle, the fact that the particle-supported elastic aggregate and the hard aggregate are uniformly arranged in the thickness direction means that the particle-bearing elastic aggregate and the hard aggregate are substantially the same Depth.

The packing structure of one embodiment is such that the elastic core material of the particle-supported elastic aggregate is formed of an elastomer and the hard particles are formed of an inorganic material and have a specific gravity of 1.0 or more and 1.5 or less.

According to the above embodiment, the particle-bearing elastic aggregate is composed of the elastic core material formed of an elastomer and the hard particles formed of an inorganic material and having a specific gravity of 1.0 or more and 1.5 or less so that when scattered together with the hard aggregate on the binder material , And sinks to a depth approximately equal to that of the hard aggregate in the binder material. Also, the particle-supported elastic aggregate is uniformly mixed with the hard aggregate to form a homogeneous aggregate. Therefore, the particle-supported elastic aggregate is fixed to the binder with the same strength as that of the hard aggregate, so that it is possible to prevent dropout along with use, to stably exhibit a predetermined function of the pavement structure, The predetermined function can be exerted without deviation.

In the present specification, the specific gravity refers to the bulk specific gravity.

In one embodiment, the particle-supported elastic aggregate has a maximum particle diameter of 1.0 mm or more and 5.0 mm or less, and the hard particles have a maximum particle diameter of 5 占 퐉 or more and 100 占 퐉 or less.

According to the above embodiment, by supporting the hard particles having the maximum particle diameter of 5 占 퐉 or more and 100 占 퐉 or less on the surface of the elastic core material having the maximum particle diameter of 1.0 mm or more and 5.0 mm or less, a sufficient specific gravity for sinking into the binder material, Thereby obtaining a particle-bearing elastic aggregate having wettability.

The packing structure of one embodiment is such that the particle-bearing elastic aggregate is formed such that the elastic core is made of rubber and the hard particles include at least one selected from the group consisting of calcium carbonate, silicon, ceramics and Portland cement have.

According to the above embodiment, the hard particles formed by including calcium carbonate, silicon, ceramics, or Portland cement are supported on the surface of the elastic core formed of rubber, so that sufficient wettability with respect to the binder material is exhibited, Thus, a packaging structure capable of stably exhibiting a predetermined function can be obtained.

In one embodiment of the packaging structure, the binder layer is formed of an epoxy resin.

According to the above embodiment, even when the binder layer is formed of an epoxy resin having a relatively high specific gravity, at the time of production, the particle-supported elastic aggregate is sufficiently submerged in the binder material of the epoxy resin, It can be fixed to the binder layer with sufficient strength.

In one embodiment of the packaging structure, the hard aggregate is formed to include ceramics or slag.

According to the above embodiment, a hard-packed structure having high durability is obtained by the hard aggregate formed by including ceramics or slag.

In one embodiment, the top coat layer is formed of a urethane resin or an acrylic resin.

According to the above embodiment, the topcoat layer formed of the urethane resin or the acrylic resin prevents the particle-bearing elastic aggregate and the hard aggregate from falling off, and a packaging structure having a stable function can be obtained.

The method for manufacturing a packaging structure of the present invention comprises a binder applying step of applying a material of a binder to a packaging surface,

A scattering step of dispersing a mixed aggregate material comprising a particle-bearing elastic aggregate bearing hard particles on the surface of the elastic core material and a hard aggregate material so as to cover the entire surface of the material of the binder coated on the packaging surface,

A curing step of curing the material of the binder,

A surplus aggregate recovering step of recovering surplus mixed aggregate,

And a topcoat applying step of applying a topcoat to the surface of the mixed aggregate and the binder.

According to the above configuration, in the binder applying step, the material of the binder is applied to the packaging surface. Subsequently, in the spreading step, the mixed aggregate material is dispersed so as to cover the entire surface of the material of the binder coated on the packaging surface, and the particle-bearing elastic aggregate material in which the hard particles are supported on the surface of the elastic core material and the hard aggregate material . In the curing step, after the material of the binder is cured, excess aggregate aggregate is recovered in the surplus aggregate recovering step. Thereafter, in the topcoat applying step, the topcoat is applied to the surfaces of the mixed aggregate and the binder. Since the particle-supported elastic aggregate and the hard aggregate can be uniformly arranged in the material of the binder, the particle-supported elastic aggregate and the hard aggregate are firmly fixed to the binder, and therefore, A packaging structure exhibiting a function can be manufactured.

The method of manufacturing a packaging structure according to an embodiment is characterized in that the binder applying step and the dispersing step are performed simultaneously so that the mixed aggregate material is dispersed in a portion to which the material of the binder is applied immediately after the material of the binder is applied on the packaging surface .

According to the above embodiment, the binder-applying elastic modulus and the hard aggregate of the mixed aggregate can be set to substantially the same depth in the material of the binder by simultaneously performing the binder applying step and the dispersing step, and then the binder can be cured. Therefore, it is possible to manufacture a highly durable packaging structure in which the particle-bearing elastic aggregate and the hard aggregate do not easily come off.

1 is a cross-sectional view showing a packaging structure according to an embodiment of the present invention.
Fig. 2 is a sectional view showing the particle-bearing elastic aggregate of the packaging structure of the embodiment. Fig.
3 is a graph showing the results of the low temperature wheel tracking test.
4 is a cross-sectional view showing a conventional freeze prevention packaging structure.

Hereinafter, embodiments of the packaging structure of the present invention will be described in detail.

1 is a sectional view showing a packaging structure of the embodiment. The packaging structure (1) is provided on the surface of the asphalt pavement (10) of the road, and its main purpose is to prevent freezing of the packaging surface. The packaging structure 1 comprises a binder layer 2 formed on a packaging surface 10a of the road and formed of an epoxy resin and a hard aggregate 3 in which a part of the binder layer 2 is buried and held, And a topcoat layer 5 covering the binder layer 2, the hard aggregate 3, and the particle-bearing elastic aggregate 4. The topcoat layer 5 is formed of a material having a high thermal conductivity.

The binder layer 2 is preferably formed of an epoxy resin, and in particular, an epoxy resin of a two-liquid mixing type is preferable. The binder layer 2 is formed to have a predetermined layer thickness on the packaging surface 10a by an amount of 1.0 to 2.0 kg / m2 per unit area. In addition to the epoxy resin, other resin such as acrylic resin or urethane resin may be used for the binder layer 2.

The hard aggregate (3) is made of an inorganic material and has a specific gravity of 2.0 or more and 5.0 or less, and has a maximum particle diameter of 1.0 mm or more and 5.0 mm or less. As the hard aggregate (3), an electric furnace water-cooled slag aggregate, a blast furnace slag aggregate, a molten slag aggregate, a ceramic aggregate, a river sand and the like can be used. In particular, an electric furnace water-cooled slag aggregate suitable for EFS5NA of JIS A 5011-2 and having a maximum particle diameter of 5 mm and a specific gravity of 3.51 is preferable.

The particle-bearing elastic aggregate 4 is formed by supporting hard particles 42 on the surface of the elastic core 41 as shown in Fig. The elastic core 41 is formed of an elastomer and is formed of a rubber material such as natural rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber and butyl rubber. The elastic core material 41 has a maximum particle diameter of 1.0 mm or more and 5.0 mm or less. The hard particles 42 are formed of an inorganic material and formed of, for example, calcium carbonate, silicon, ceramics, or Portland cement. The hard particles 42 have a maximum particle diameter of 5 占 퐉 or more and 100 占 퐉 or less. The hard particles 42 are fixed on the surface of the elastic core material 41 with an adhesive 43 and carried. The adhesive 43 can be appropriately selected according to the material of the elastic core 41 and the hard particles 42. For example, a urethane adhesive, a modified silicone adhesive, or the like can be used. The particle-bearing elastic aggregate (4) having the hard particles (42) supported on the surface of the elastic core (41) has a specific gravity of 1.0 or more and 1.5 or less as a whole.

The hard aggregate (3) and the particle-bearing elastic aggregate (4) are mixed at a weight ratio between 100: 70: 70: 30, and the hard aggregate: do. Here, it is preferable to mix the hard aggregate: particle-bearing elastic aggregate at a weight ratio between 30:70 and 50:50. Particularly preferably, the hard aggregate: the particle-bearing elastic aggregate is 30: 70, and the weight ratio of the particle-bearing elastic aggregate 4 in the mixed aggregate is set to be larger than that of the hard aggregate 3, The noise suppression function, and the shock-absorbing function can be effectively exhibited. The mixed aggregate is installed so that at least a part of the aggregate material is embedded in the binder layer 2 by an amount of 3.5 to 6.5 kg / m 2 per unit area.

The top coat layer 5 is preferably formed of an acrylic resin or a urethane-based resin, and in particular, a methacrylic resin in which curing is accelerated by a curing accelerator is preferable. The top coat layer 5 is formed to have a predetermined layer thickness on the binder layer 2, the hard aggregate 3 and the particle-bearing elastic aggregate 4 by an amount of 0.1 to 0.5 kg / m 2 per unit area.

(Example)

In the embodiment, a packaging structure that is installed on a motorway and exhibits a function of restraining freezing will be described.

The freeze prevention packaging structure 1 as the packaging structure of the embodiment is manufactured as follows. First, the particle-bearing elastic aggregate 4 is produced. 16.95 parts by weight of an adhesive and 71.44 parts by weight of a mixed powder of calcium carbonate and black carbon as hard particles 42 were added to 100 parts by weight of a rubber chip as the elastic core material 41 and stirred for several minutes with a mortar mixer. The rubber chip is a mixed rubber chip obtained by mixing 80 parts by weight of 1000H manufactured by Misawa Co., Ltd. and 20 parts by weight of 1220 by Misawa Industries Co., Ltd. As the adhesive 43, a barynar of a urethane-based adhesive made by Kanae Kagaku Kogyo Co., Ltd. is used. The viscosity of the adhesive 43 is preferably 0.1 Pa · s (pascal second) or more and 10 Pa · s or less when the elastic core member 41 and the hard particles 42 are mixed, particularly preferably 1 Pa S or more and 5 Pa s or less.

The maximum diameter of the elastic core 41 is, for example, 2.0 mm. The particle distribution of the elastic core material 41 was 100%, the percentage passing through the sieve of 1.70 mm was 73.7%, the passing percentage of the sieve of 1.18 mm was 35.7% The percentage of sieve passing is 20.8%, and the passing percentage of sieve of 0.15 mm is 2.9%. The dimensions of the sieve are values of the nominal scale specified in JIS Z 8801-1-2000. The elastic core material 41 of the present invention has a particle size distribution in which the passing percentage of the sieve of 2.80 mm is 90% or more and 100% or less, the passing percentage of the sieve of 1.70 mm is 65% or more and 85% , The percentage of passage of the sieve of 0.6 mm is not less than 10% and not more than 30%, and the percentage of passage of the sieve of 0.15 mm is not less than 0% and not more than 10%.

The maximum particle diameter of the hard particles 42 is, for example, 19 占 퐉. The particle size distribution of the hard particles 42 is such that the integrated percentage of the particle diameter of 30 占 퐉 is 100%, the integrated percentage of the particle diameter of 15 占 퐉 is 90%, the integrated percentage of the particle diameter of 10 占 퐉 is 78% The cumulative percentage of the particle diameter of 5 mu m is 55%, and the cumulative percentage of the particle diameter of 1 mu m is 17%. The particle diameter was obtained by laser diffraction confusion method. The particle size distribution of the hard particles 42 of the present invention is such that the integrated percentage of the particle diameter of 30 占 퐉 is 90% or more and 100% or less, the integrated percentage of the particle diameter of 15 占 퐉 is 80% or more and 98% , The cumulative percentage of the particle diameter of 5 占 퐉 is 45% or more and 65% or less, and the cumulative percentage of the particle diameter of 1 占 퐉 is 5% or more and 25% or less.

The elastic core 41, the hard particles 42 and the adhesive 43 are mixed and taken out from the mortar mixer, followed by curing and drying in the curing yard. Thereafter, the surplus mixed powder is removed with a sieve having a size of 500 mu m to complete the particle-bearing elastic aggregate 4. The particle-bearing elastic aggregate 4 does not have to be manufactured at the installation position of the freeze-preventing packaging structure 1 but is manufactured in advance in the production yard and transported to the installation position of the freeze-

The particle size distribution of the particle-supported elastic aggregate 4 thus formed was 95%, the passing percentage of the sieve of 1.70 mm was 61.7%, the passing percentage of the sieve of 1.18 mm was 26.4% , The passing percentage of the sieve of 0.6 mm is 4.3%, and the passing percentage of the sieve of 0.15 mm is 0.0%. The dimensions of the sieve are values of the nominal scale specified in JIS Z 8801-1-2000. The particle-size distribution of the particle-bearing elastic aggregate (4) of the present invention is such that the passing percentage of the sieve of 2.80 mm is not less than 90% and not more than 100%, the passing percentage of the sieve of 1.70 mm is not less than 50% and not more than 70% Of the sieve body is 15% or more and 35% or less, the percentage of passage of the sieve body of 0.6 mm is 1% or more and 15% or less, and the percentage of sieving of 0.15 mm is 0% or more and 5% or less.

In the installation position of the freezing prevention packaging structure 1, the installation site on the packaging surface is cleaned to remove waste, oil and water, and subjected to a soaking treatment. Subsequently, the material of the binder layer 2 is prepared by mixing a bisphenol F type epoxy resin (Epoluto N made by Mitsubishi Kagaku K.K.) and a modified aliphatic polyamine as a curing agent with a stirrer. The above-mentioned base and the curing agent are mixed at a weight ratio of 100: 100. The viscosity of the binder material that is the material of the binder layer 2 is preferably 0.01 Pa · s or more and 10 Pa · s or less, particularly preferably 0.05 Pa · s or more, and more preferably 0.05 Pa · s or more Pa s or less. The viscosity of the binder material is more preferably from 0.1 Pa.s or more to 0.15 Pa.s or less when the binder is applied by a roller, and more preferably from 3 Pa s or more to 5 Pa or less when the binder is applied by a spraying apparatus. s or less.

Along with this, the hard aggregate (3) and the particle-bearing elastic aggregate (4) are mixed with a mortar mixer to prepare a mixed aggregate. As the hard aggregate (3), a slurry of oxidized water-cooled slag is used, and EcoSTAR No. 4 manufactured by Ube Sansei Kogyo Co., Ltd. can be used. The hard aggregate (3) and the particle-supported elastic aggregate (4) are mixed at a weight ratio of 100: 100. The maximum grain size of the hard aggregate 3 is, for example, 2.0 mm. The particle size distribution of the hard aggregate (3) was 100%, the percentage passing through the sieve of 1.70 mm was 75.1%, the passing percentage of the sieve of 1.18 mm was 43.4% The sieve passage percentage is 11.7% and the 0.15 mm sieve passage percentage is 2.6%. The dimensions of the sieve are values of the nominal scale specified in JIS Z 8801-1-2000. The particle size distribution of the hard aggregate 3 of the present invention is such that the passing percentage of the sieve of 2.80 mm is not less than 90% and not more than 100%, the passing percentage of the sieve of 1.70 mm is not less than 65% and not more than 85% , The percentage of passage of the sieve of 0.6 mm is not less than 5% and not more than 20%, and the percentage of passage of sieve of 0.15 mm is not less than 0% and not more than 10%.

A binder material obtained by mixing the above-mentioned subject and a curing agent is applied to the packaging surface 10a with a rubber rake or a roller. The application amount of the binder material on the packaging surface 10a is 1.5 kg / m2 per unit area. The mixed aggregate of the hard aggregate (3) and the particle-bearing elastic aggregate (4) is dispersed on the binder material immediately after the application, so as to follow the application work of the binder material. Dispersion of mixed aggregate is done using a shovel or spreader. The mixed aggregate is dispersed through the binder material until the packaging surface 10a can not be visually inspected. When the dispersion is completed, curing is performed for a predetermined time. When the curing is completed, the curing of the binder material is confirmed, and the excess mixed aggregate is removed from the binder material by a sweeper or the like. Thereby, on the packaging surface 10a, the binder layer 2 in which the aggregate aggregates are arranged in the plane direction substantially at the thickness of one particle is obtained.

Subsequently, a curing accelerator is added to the subject methacrylic resin, 50% benzoyl peroxide as a curing agent is added according to the temperature, and these are mixed with stirring to prepare a material for the top coat layer 5. The methacrylic resin may be Mitsui Kagaku Shaisha Chemical Co., Ltd., and 50% benzoyl peroxide may be BPA-50 available from Kayaku Chemical Industries Co., The material of the topcoat layer 5 is coated on the binder layer 2, the hard aggregate 3 and the particle-bearing elastic aggregate 4 with a roller. The application amount of the material of the top coat layer 5 is 0.3 kg / m 2 per unit area. Thereafter, when the top coat layer 5 is cured by curing for a predetermined time, the freeze-preventing packaging structure 1 is completed.

(Freezing and Tensile Strength Test)

The freeze-inhibition packaging structure (1) of the example was subjected to a test for confirming the effect of inhibiting freeze-bonding. The effect of inhibition of freezing fixation was confirmed by the frozen fastening tensile strength test in accordance with the package performance evaluation method published by Japan Road Association. The freezing fastening tensile strength test is carried out by including water in the contact material of the jig, bringing it into contact with the specimen, curing the specimen in the low temperature chamber and freezing and fixing the jig to the specimen, and then applying impact force to the specimen by dropping the steel ball. Thereafter, a tensile force was applied to the jig by a tensile tester, and the tensile strength at the time of separation from the specimen was measured. The specimen used for the wheel tracking test was 300 mm long × 300 mm wide × 40 mm thick. Table 1 shows the experimental conditions for the freeze-bonded tensile test.

In the embodiment, three kinds of specimens different in the mixing ratio of the hard aggregate 3 and the particle-bearing elastic aggregate 4 constituting the mixed aggregate and the material of the top coat layer 5 were produced and tested. Details of the specimens of the examples are shown in Table 2. Two specimens were made for one kind, and each specimen was tested.

In addition, as a comparative example, a specimen of a wheat-grain-size asphalt concrete (hereinafter referred to as a wheat grain-size ascon) was prepared and tested. The whetstone asphalt is an asphalt mixture for surface layer using aggregates having a maximum particle diameter of 13 mm. The specimen numbers of the comparative examples are 7 and 8.

Table 3 shows the results of carrying out the frozen fastening tensile strength test on the specimen numbers 1 to 6 of the above examples and the specimen numbers 7 and 8 of the comparative examples.

As can be seen from Table 3, all the specimens 1 to 6 of the Examples had smaller freezing and fixing tensile strengths than the specimens 9 and 10 of the comparative examples, and the effect of inhibiting freezing and adhesion can be exerted. Further, in the embodiment, it is possible to exert the effect of suppressing the freezing and bonding by using an acrylic resin rather than using a water-based urethane resin as the material of the topcoat layer 5.

(Low temperature wheel tracking test)

In order to evaluate the freezing inhibiting effect of the freeze-inhibition packaging structure 1 of the embodiment, traverse running was repeated with a wheel-tracking tester while water was regularly dispersed on the surface of the specimen under a low-temperature environment, and a thin film of ice Was evaluated. The crushing effect of ice was evaluated by measuring the sliding resistance value of the specimen surface. The slip resistance values were measured using a pendulum skid resistance tester, and the measurement results were expressed as BPN values. The traverse running by the wheel-tracking tester and the measurement of the sliding resistance value were repeated, and the test was terminated when the BPN value decreased to about 30. The specimen used for the wheel tracking test was 300 mm long × 300 mm wide × 40 mm thick. Table 4 shows the experimental conditions of the freezing and torsional tensile test.

In the low temperature wheel tracking test, the test specimens of Examples 1 and 2 and comparative examples shown in the following Table 5 were tested.

In addition, as a comparative example, a specimen made of an asphalt mixture having a maximum particle diameter of 13 mm and made of a surface layer asphalt mixture was used.

3 is a graph showing the results of the low temperature wheel tracking test. In the graph of Fig. 3, the abscissa indicates the elapsed time (minutes) from the start of the test, and the ordinate indicates the BPN value indicating the sliding resistance value. As can be seen from the graph of Fig. 3, in the milky asphalt of Comparative Example, the ice sheet was formed by the dispersion of water, the BPN value rapidly decreased, the BPN value became 30 or less after 30 minutes from the start of the test, It ended. On the other hand, in both of Examples 1 and 2, since the ice formed by the dispersion of water is crushed by the running of the loaded tire of the wheel-tracking tester, the ice sheet is hardly formed and the decrease of the BPN value is gentle. As described above, Examples 1 and 2 have a higher freezing inhibition effect than that of the milky aspicone.

(Wear test)

In order to confirm the abrasion resistance of the freeze-inhibition packaging structure 1 of the embodiment, a taber abrasion test was conducted. The Taber abrasion test was carried out in accordance with JIS K7204 by applying a load of 9.8N using a wear wheel H-22. The number of revolutions of the abrasive wheel was 500 revolutions. The mass of the specimen was measured before and after the test, and the difference between them was calculated to determine the abrasion mass. In the specimen of the embodiment, a mixed aggregate material in which the hard aggregate 3 and the particle-bearing elastic aggregate 4 are mixed at a weight ratio of 100: 100 is disposed in the binder layer 2. The specimen of the comparative example is obtained by placing a mixed aggregate in which the hard aggregate (3) and the elastic core (41) of a rubber chip are mixed in a weight ratio of 100: 100 to the binder layer (2). Both the specimens of Examples and Comparative Examples do not form a topcoat layer.

The results of the Taber abrasion test are shown in Table 6.

As can be seen from Table 6, it can be said that the freeze-inhibition packaging structure 1 of the embodiment has a smaller abrasion mass than the comparative example and is superior in abrasion resistance to the comparative example.

As described above, the freeze-inhibition packaging structure 1 of the present invention has high durability as well as a high freeze-inhibiting function. Therefore, the freezing-inhibiting packaging structure 1 can exhibit the freezing-inhibiting function over a long period of time.

In the above embodiment, the frost restraining packaging structure 1 of the present invention is installed in the asphalt pavement 10, but it may be installed in another package such as concrete pavement.

In the above embodiment, the packing of the automobile road is inhibited from being frozen by the packing structure, but slipping prevention and noise suppression of the packaging may be performed. In addition, the packaging structure of the present invention may be applied to the packaging of the stadium to mitigate the impact on the player, or may be applied to the cart path of the golf course to prevent slipping of the cart. Further, the binder material of the examples may be colored by adding pigments, if necessary, and a surfactant may be added to enhance the water-permeability function.

1: Packing structure
2: Binder layer
3: Hard aggregate
4: Particle-supported elastic aggregate
5: Top coat layer
10: Asphalt pavement
10a: packing side

Claims (9)

A binder layer provided on the packaging surface,
A mixed aggregate in which a particle-supported elastic aggregate in which hard particles are supported on the surface of an elastic core material and a hard aggregate are mixed, and the particle-supported elastic aggregate and the hard aggregate are uniformly arranged in the depth direction,
And a top coat layer covering the binder layer, the hard aggregate, and the particle-bearing elastic aggregate. The packaging structure according to claim 1, wherein the elastic particles of the particle-bearing elastic aggregate are formed of an elastomer and the hard particles are formed of an inorganic material and have a specific gravity of 1.0 or more and 1.5 or less. The particle-supported elastic aggregate according to claim 1, wherein the elastic core material has a maximum particle diameter of 1.0 mm or more and 5.0 mm or less, and the hard particles have a maximum particle diameter of 5 占 퐉 or more and 100 占 퐉 or less. Packing structure. The particle-bearing elastic aggregate according to claim 1, wherein the elastic core material is formed of rubber and the hard particles are formed to include at least one selected from the group consisting of calcium carbonate, silicon, ceramics, and Portland cement Features, packaging structure. The packaging structure according to claim 1, wherein the binder layer is formed of an epoxy resin. The packaging structure according to claim 1, wherein the hard aggregate is formed to include ceramics or slag. The packaging structure according to claim 1, wherein the top coat layer is formed of a urethane resin or an acrylic resin. A binder applying step of applying a binder material to the packaging surface,
A scattering step of dispersing a mixed aggregate material comprising a particle-bearing elastic aggregate bearing hard particles on the surface of the elastic core material and a hard aggregate material so as to cover the entire surface of the material of the binder coated on the packaging surface,
A curing step of curing the material of the binder,
A surplus aggregate recovering step of recovering surplus mixed aggregate,
And a topcoat applying step of applying a topcoat to the surface of the mixed aggregate and the binder. The method according to claim 8, characterized in that the binder applying step and the scattering step are performed simultaneously so that the mixed aggregate material is dispersed in the application portion of the material of the binder immediately after the material of the binder is applied on the packaging surface , And a method of manufacturing the package structure.

Images