JP4801656B2 - Permeable water-retaining pavement and its construction method - Google Patents

Description

  The present invention relates to a water-permeable type water-retaining pavement having both water-permeability and water-retaining property, and a construction method thereof.

  As one means for improving the urban thermal environment, it has been proposed to apply water-retaining pavement that suppresses the increase in road surface temperature. The water-retaining pavement uses the endothermic effect when water is retained in the pavement and the water evaporates to lower the temperature of the road surface and its surroundings.

The water-retaining pavement is generally configured by injecting cement grout having water retentivity into the voids of the base asphalt mixture having voids, as with the semi-flexible pavement. In such a water-retaining pavement, the water retention function is exhibited by retaining moisture in the capillaries in the cement grout. However, since the capillary diameter is very small, it is considered that water does not instantaneously fill the capillary but permeates at a very slow rate. Therefore, the water permeability coefficient of the water-retaining pavement is very small (about 1 × 10 ⁻⁶ to 10 ⁻⁸ cm / s), and the soil classification is classified into the impermeable category.

  By the way, the sidewalk requires the convenience of pedestrians, and since it is necessary to return rainwater to the underground, permeable pavement is generally applied. When the water-retaining pavement as described above is applied to the sidewalk, since most of the rainwater is drained to the surface, it is not preferable because the puddle easily forms a puddle and the rainwater does not penetrate to the roadbed below the pavement.

  In addition, drainage pavement and water-permeable pavement, where puddles are unlikely to occur, are commonly used for roadways, and water-retaining pavements where the drainage of rainwater as described above is surface drainage are limited to application to roadways. The current situation is.

Therefore, in recent years, development of a water-permeable type water-retaining pavement that has both water-permeability and water-retention property has been demanded. For example, Patent Document 1 discloses a water-permeable water-retaining pavement. This water-permeable type water-retaining pavement is composed by mixing a water-dispersible resin binder with water-retaining sand such as crystal clay and rubbing this mixture onto the construction surface of the porous pavement. In addition, the water permeability function and the water retention function were combined.
JP 2007-63861 A

  However, in the water-permeable type water-retaining pavement of Patent Document 1 described above, the binder is mixed after the water-retaining water retaining water has absorbed water, so that the components of the binder are uniformly distributed throughout the water-retaining sand. In some cases, it was difficult to mix, leaving room for improvement.

  Therefore, the present invention was devised in view of these problems, and provides a water-permeable type water-retaining pavement having a water-permeable function while having a high water-retaining function over the entire pavement surface, and a construction method thereof. Let it be an issue.

  The invention according to claim 1 for solving the above-mentioned problem is a water-permeable type water-retaining pavement having both water-permeability and water-retaining property, and a single particle of a binder formed by adding and mixing water to a water-dispersible resin. Water-permeable type water-permeable resin mortar composed by mixing with fine aggregates such as sand is filled in the space of asphalt mixture or coarse aggregate as a base material to form a water-permeable type water-retaining layer It is a water-retaining pavement.

  According to such a configuration, since the binder is formed by adding and mixing water to the water-dispersed resin, the viscosity of the binder is lowered, and the binder is spread over the entire void portion of the fine aggregate such as single grain sand. It can be evenly distributed over the entire area. Thereby, the fine aggregates are securely fixed to each other over the entire fine aggregate at a predetermined interval, and the gap between the fine aggregates can be maintained at an appropriate size for water retention. In addition, since the binder is hydrophilic, water can smoothly flow into the gaps between the fine aggregates to retain the water. On the other hand, when the gap between the fine aggregates is filled with water and excess water flows in, the gap flows between the fine aggregates and drains downward. That is, according to this structure, a high water retention function and a water permeability function can be obtained together over the whole water-permeable type water-retaining pavement. Therefore, the temperature of the road surface and its surroundings can be lowered, and the generation of puddles can be prevented.

  The invention according to claim 2 is the water-permeable water-retaining pavement according to claim 1, wherein the water-dispersed resin is made of a water-dispersed epoxy resin or a water-dispersed acrylic resin.

  According to such a configuration, the hydrophilicity of the binder can be increased, water can easily flow into the water permeable water retaining layer, and the water retaining property can be further enhanced.

  The invention according to claim 3 is a method for constructing a water-permeable type water-retaining pavement having both water-permeability and water-retaining property, wherein a base asphalt mixture is laid on a roadbed or a base layer, and vibration is generated on the surface of the asphalt mixture. While filling the asphalt mixture with a single grain of sand, the part of the single grain sand is sucked and removed from the surface of the asphalt mixture at a predetermined thickness, and water is added to the water-dispersed resin in advance. The mixed binder is mixed with fine aggregate such as single grain sand to form a water permeable water-retaining resin mortar, and in the voids on the surface of the asphalt mixture from which the single grain sand is removed by suction, A water-permeable water-retaining pavement construction method characterized by rubbing a water-permeable water-retaining resin mortar.

  According to such a method, since the water permeable water retaining layer into which the water permeable water retaining resin mortar is rubbed is formed on the surface of the water permeable water retaining pavement, the water retention in the surface layer portion of the water permeable water retaining pavement is high, Great temperature reduction effect. In addition, since the lower part of the water-permeable type water retaining resin mortar is filled with single-grained sand, the water that has flowed saturated from the water-permeable type water retaining resin mortar flows down to the lower layer, and has water permeability and high water retaining property. In addition, once the filled single grain sand is sucked and rubbed with the water-permeable water retaining resin mortar, scattering, scouring and outflow of the single grain sand due to wind and rain can be prevented. Furthermore, since the single-grain sand and the water-permeable water retaining resin mortar are the same aggregate, the pore diameters of the filled single-grain sand and the rubbed portion of the water-permeable water retaining resin mortar are substantially equal. Therefore, the water permeability and water retention of the water permeable water retentive pavement become continuous and uniform.

  The invention according to claim 4 is a method for constructing a water-permeable type water-retaining pavement having both water-permeability and water-retaining property, wherein a base asphalt mixture is laid on a roadbed or a base layer, and vibration is generated on the surface of the asphalt mixture. In addition, a single grain sand is filled in the voids of the asphalt mixture, and a binder formed by adding and mixing water in advance with a water-dispersed resin is sprayed from the surface of the asphalt mixture and penetrates into the single grain sand. It is the construction method of the water-permeable type water-retaining pavement characterized by making it carry out.

  According to such a method, the binder is infiltrated into the single grain sand by a simple operation such as spraying from the surface of the asphalt mixture to form a water permeable water retaining layer, which is high throughout the water permeable water retaining pavement. In addition to the function and effect of being able to obtain both the water retention function and the water permeability function, the function and effect of significantly reducing labor and time required for construction can be obtained. Furthermore, since the depth which a binder osmose | permeates can be ensured large and a uniform layer can be constructed | assembled, water permeability and water retention can be improved further.

  The invention according to claim 5 is the construction method of the water-permeable water-retaining pavement according to claim 3 or 4, wherein the asphalt mixture is laid after laying a nonwoven fabric on the roadbed. .

  According to such a method, it is possible to prevent the single-grained sand from flowing out to the lower layer after the construction and during the construction, and the water that saturates and flows out from the water-permeable water retaining layer can flow to the lower layer.

  The invention according to claim 6 is a method for constructing a water-permeable water-retaining pavement that has both water-permeability and water-retentiveness, and comprises a coarse aggregate, a fine aggregate such as single grain sand, and a water-dispersed resin in advance. It is a construction method of a water-permeable water-retaining pavement characterized in that a pavement material is formed by mixing with a binder formed by adding and mixing water, and the pavement material is laid on a roadbed or a base layer.

  According to such a method, a coarse aggregate, a fine aggregate such as single grain sand, and a binder formed by adding and mixing water in advance to a water-dispersed resin are mixed to form a paving material, In addition to the action and effect that a water permeable retention layer is formed by a simple operation such as laying a pavement material, a high water retention function and a water permeable function can be obtained over the entire water permeable type water retention pavement, The effect that the labor and time concerning construction can be reduced significantly is also obtained. Furthermore, a water permeable retention layer having a uniform cross section from the surface to the bottom surface can be constructed.

  According to this invention, the outstanding effect that a high water retention function and a water permeability function can be obtained collectively over the whole water-permeable type water-retaining pavement is exhibited.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted.

[First embodiment]
First, the structure of the water-permeable water-retaining pavement for vehicles which concerns on 1st embodiment is demonstrated. FIG. 1 is a cross-sectional view showing a first best mode for carrying out a water-permeable water-retaining pavement for a roadway according to the present invention.

  As shown in FIG. 1, in this water-permeable water-retaining pavement 1, a roadbed 11 and a base layer 12 are formed in order from the bottom on a roadbed 10. The roadbed 11 and the base layer 12 are constructed in the same manner as a conventional road, and the roadbed 11 is made of, for example, a particle size material 11a having a maximum particle size of 40 to 20 mm (for example, a particle size adjusted crushed stone M-40 (40 to 0 mm), M-30 (30-0 mm), M-20 (20-0 mm), Crusheran C-40 (40-0 mm), C-30 (30-0 mm), C-20 (20-0 mm), etc.) The base layer 12 is formed of, for example, an asphalt mixture 12a formed by mixing coarse aggregate, fine aggregate, asphalt, and the like at a predetermined ratio. And has a thickness of 50 to 100 mm.

  On the base layer 12, a single-grain sand-filled layer 15 is formed by filling a single-grain sand 14 into the voids of the asphalt mixture 13 as a base. Further, a water permeable water retaining layer 17 having both water permeability and water retaining property is formed on the single grain sand packed layer 15. The water permeable water retaining layer 17 is an asphalt mixture, which is a base material of a water permeable water retaining resin mortar 16 formed by mixing a binder obtained by adding and mixing water to a water-dispersed resin with fine aggregate such as single grain sand. It is formed by filling 13 gaps.

  The asphalt mixture 13 is configured by mixing coarse aggregate, fine aggregate, asphalt, and the like at a predetermined ratio, and has a maximum particle size of 20 to 13 mm and a porosity of 20 to 25%. Yes. As the single-grained sand 14 filled in the voids of the asphalt mixture 13, those having a particle diameter of 0.2 to 0.8 mm are used.

  The binder constituting a part of the water-permeable water-retaining resin mortar 16 is formed by adding and mixing water to the water-dispersed resin before being mixed with the fine aggregate. As the water dispersion type resin, a water dispersion type epoxy resin or a water dispersion type acrylic resin is used. As the single grain sand 14 used as the fine aggregate, one having a particle diameter of 0.2 to 0.8 mm is used. The fine aggregate, water-dispersed resin, and water content (% by weight) constituting the water-permeable water-retaining resin mortar 16 are fine aggregate: 87.0 to 95.2 weight as shown in Table 1 below. %, Water-dispersed resin 3.7 to 11.9% by weight, water: 0.4 to 3.0% by weight.

  The water-permeable type water-retaining resin mortar 16 is filled by being rubbed into the gap portion of the asphalt mixture 13 and press-fitted. The water permeable water retaining layer 17 formed in this way is a layer disposed on the surface of the water permeable water retaining pavement 1 and has a thickness of 10 to 15 mm. The water permeable water retaining layer 17 and the single grain sand packed layer 15 have a thickness of 30 to 40 mm in total.

  Next, the structure of the water-permeable type water-retaining pavement for sidewalks according to the first embodiment will be described. FIG. 2 is a cross-sectional view showing the best first mode for carrying out a water-permeable water-retaining pavement for sidewalks according to the present invention.

  As shown in FIG. 2, in the permeable water-retaining pavement 2, a roadbed 21 is formed on a roadbed 10. The roadbed 21 is constructed in the same manner as a conventional road. For example, a particle size material 21a having a maximum particle size of 40 to 20 mm (for example, particle size-adjusted crushed stone M-40 (40 to 0 mm), M-30 (30 to 0 mm)). ), M-20 (20-0 mm), Crusheran C-40 (40-0 mm), C-30 (30-0 mm), C-20 (20-0 mm), etc.) are laid to a thickness of 100-150 mm Then, it is formed by rolling or the like. Compared with the water-permeable type water-retaining pavement 1 for a roadway, the load applied to the road surface can be reduced, so that it is formed thin. Further, the water-permeable water-retaining pavement 2 has a nonwoven fabric 22 laid on the roadbed 21. The nonwoven fabric 22 has a thickness of about 1 mm and has a heat resistance of about 180 ° C. The nonwoven fabric 22 is made of, for example, a heat-resistant material such as vinylon, and has a structure that allows water to permeate but does not allow the single grain sand 14 to permeate.

  On the nonwoven fabric 22, a single-grain sand-filled layer 15 is formed by filling the voids 13 b (see (e) of FIG. 3) of the asphalt mixture 13 as a base material with the single-grain sand 14. Further, a water permeable water retaining layer 17 having both water permeability and water retaining property is formed on the single grain sand packed layer 15. Since the single-grain sand-filled layer 15 and the water-permeable water-retaining layer 17 have the same configuration as the water-permeable type water-retaining pavement 1 for a roadway, the same reference numerals are given and description thereof is omitted.

  Next, a construction method of the permeable water-retaining pavement 2 for sidewalks having the above-described configuration will be described with reference to FIGS. 3 and 4.

  First, as shown in FIG. 3 (a), the particle size material 21a is laid down to a thickness of 100 to 150 mm on the roadbed 10 whose surface has been leveled by rolling or the like, and is rolled. Then, the roadbed 21 is formed in a straightened manner (Step 1-1 in FIG. 4). This process is carried out in the same way as normal road construction. Thereafter, as shown in FIG. 3B, the nonwoven fabric 22 is laid on the roadbed 11 (Step 1-2 in FIG. 4). In addition, when constructing the water-permeable water-retaining pavement 1 for a roadway, as shown in FIG. 1, the base layer 12 comprised with the asphalt mixture 12a is formed on the roadbed 11 whose thickness is 200-800 mm.

  And as shown in FIG.3 (c), the asphalt mixture 13 used as a base | matrix is laid by the predetermined | prescribed thickness in the range of 30-40 mm on the nonwoven fabric 22 (Step 1-3 of FIG. 4). Here, the asphalt mixture 13 has a maximum particle size of 20 to 13 mm and a porosity of 20 to 25%.

  Thereafter, as shown in FIG. 3 (d), when the temperature of the laid asphalt mixture 13 falls to room temperature (approximately the same as the air temperature), the surface of the asphalt mixture 13 is vibrated using a vibrating roller 25 or the like. Then, the single-grained sand 14 is filled in the gap 13a (see FIG. 3C) of the asphalt mixture 13 (Step 1-4 in FIG. 4). At this time, the vibration is not directly applied to the single grain sand 14 but is applied to the surface of the asphalt mixture 13. In this way, the single-sand 14 is not compacted in the gap 13a, and is uniformly distributed and filled in the entire gap 13a from the bottom to the surface of the layer of the asphalt mixture 13. Become. The asphalt mixture 13 has a maximum particle size of 20 to 13 mm and a porosity of 20 to 25%, and the single grain sand 14 has a particle size of about 0.2 to 0.8 mm. The sand 14 is sequentially filled from the bottom without being clogged with the gap 13 a of the asphalt mixture 13. Moreover, since the nonwoven fabric 22 is laid under the asphalt mixture 13 at this time, the single grain sand 14 does not flow out to the roadbed 21 side.

  And as shown to (e) of FIG. 3, after completion | finish of the filling of the single grain sand 14, a part of the single grain sand 14 is about 10-15 mm from the surface of the asphalt mixture 13 using suction machine 26 grade | etc.,. Is removed with a predetermined thickness (Step 1-5 in FIG. 4). At this time, since the single grain sand 14 is not compacted, it is sucked smoothly. The suction depth of the single grain sand 14 can be managed by the suction amount or the suction time.

  On the other hand, a binder (not shown) is formed by adding and mixing water in advance with a water-dispersed resin composed of a water-dispersed epoxy resin or a water-dispersed acrylic resin (Step 1-6 in FIG. 4). . And this binder is mixed with the single grain sand 14 attracted | sucked in Step1-5, or another single grain sand, and the water-permeable type water retention resin mortar 16 is formed (Step1-7 of FIG. 4).

  And as shown in FIG.3 (f), the water-permeable type water-retaining resin mortar 16 is put into the void 13b (see (e) of FIG. 3) on the surface of the asphalt mixture 13 from which the single-grain sand 14 is removed by suction. Rub (Step 1-8 in FIG. 4). The permeable mortar 16 is rubbed by pressing from the surface of the asphalt mixture 13 using a rake (not shown) or the like. Finally, it is press-fitted into the gap 13b using a rubber winding roller of about 4t, a tire roller, or a vibro plate.

  According to the construction method and configuration as described above, since the binder is formed by adding and mixing water to the water-dispersed resin, the binder has a low viscosity, and the binder is a fine aggregate such as single grain sand 14. Can be uniformly coated on the surface. This ensures that the single-sand 14 is firmly fixed at a predetermined interval over the entire single-sand 14 (fine aggregate), and the gap between the single-sand 14 is maintained at an appropriate size for water retention. Can do. In addition, since a hydrophilic water-dispersed resin is used for the binder, the binder does not repel water, and water can smoothly flow into the gaps between the single grain sands 14, and the water is reliably retained. It becomes possible. On the other hand, when the gaps between the fine aggregates are filled with water and become saturated, excess water flows through the gaps between the single grain sands 14 and is drained downward. At this time, since the single grain sand 14 is fixed by the binder, it is not flushed with water. That is, according to this structure, a high water retention function and a water permeability function can be obtained together over the whole water-permeable type water-retaining pavement. Therefore, the temperature of the road surface and its surroundings can be lowered, and the generation of puddles can be prevented.

  Moreover, according to the construction method of the water-permeable water-retaining pavement 2, the water-permeable water-retaining layer 17 into which the water-permeable water-retaining resin mortar 16 is rubbed is formed on the surface of the water-permeable water-retaining pavement 2. The water retention at the surface layer portion of the pavement 2 is high, the retained water is easily evaporated, and the temperature reduction effect is increased. Moreover, since the single-grained sand 14 is filled in the lower part of the water-permeable type water-retaining resin mortar 16, surplus water that has flowed when the water-permeable water-retaining layer 17 is saturated flows down to the lower layer, and has water permeability and high water-retaining property . In addition, since the nonwoven fabric 22 is laid under the single grain sand filling layer 15 filled with the single grain sand 14, the single grain sand 14 does not flow out to the road bed 10.

  Further, the suction part in Step 1-5 has a thickness of 10 to 15 mm, so that the volume of the water retaining space can be secured, the water retaining amount can be secured, and the water-permeable water retaining resin mortar 16 is rubbed and filled. It is possible to reliably press-fit the layer of the single grain sand 14 that has been made. As a result, the single grain sand 14 of the single grain sand packed layer 15 and the water permeable water retaining resin mortar 16 of the water permeable water retaining layer 17 are brought into contact with each other and the water retained in the single grain sand 14 is permeable to water. Since it is supplied to the mold water-retaining resin mortar 16 and evaporates from the road surface, the temperature reduction effect on the road surface and its surroundings can be further enhanced.

  On the other hand, in the construction method of the water-permeable type water-retaining pavement 2, the once-filled single grain sand 14 is sucked and the water-permeable type water-retaining resin mortar 16 is rubbed into the gap 13b. The filling amount of the resin mortar 16 can be easily managed, the water permeable water retaining layer 17 can be easily formed to a desired thickness, and the dimensional accuracy can be increased. In addition, once the filled single grain sand 14 is sucked and rubbed with the water-permeable water retaining resin mortar 16, scattering, scouring and outflow of the single grain sand 14 due to wind and rain can be prevented. Furthermore, since the single grain sand 14 and the water-permeable water retaining resin mortar 16 are the same aggregate, the gap diameters of the filled single grain sand 14 and the rubbed portion of the water-permeable water retaining resin mortar 16 are substantially equal. Therefore, the water permeability and water retention of the water permeable water retentive pavement become continuous and uniform.

  Below, the physical property test done using the test body comprised with the water-permeable water retention layer 17 and the single grain sand packed layer 15 which concerns on this embodiment is demonstrated. Here, an aggregate scattering resistance test, a test for measuring the water permeability, and a water retention pavement room irradiation test were performed.

  The specimens used for the aggregate scattering resistance test and the water permeability test were formed as shown in Table 2 below, and were formed in a square plate shape with a side of 30 × 30 cm × thickness of 3 cm. Something is used. The ratio of the thickness of the water permeable water retaining layer 17 and the single grain sand packed layer 15 of the specimen is 3: 7.

  As shown in Table 2, two specimens are used in the test. The asphalt mixture used as the base material of each specimen is one having a maximum particle size of 13 mm and a porosity of 25%, and single-grain sand having a particle size of 0.3 to 1.2 mm is used. On the other hand, in the specimen A, each material of the water-permeable water-retaining resin mortar is composed of single grain sand (particle size: 0.3 to 0.8 mm): 90.9% by weight, water-dispersed resin: 7.5% by weight. %, Water: 1.5% by weight, and in the other specimen B, the composition of each material of the water-permeable water-retaining resin mortar was as follows: single grain sand: 95.2% by weight, water-dispersed resin: 3.7 % By weight, water: 1.1% by weight.

  In the aggregate scattering resistance test, a rubber hose defined by the International Slurry Surfing Association (ISSA) is horizontally installed on the specimen using a tester according to a known wet track abrasion tester, The rubber hose was loaded at 5 kg, and the aggregate hose resistance was obtained by performing continuous operation for a specified time with a planetary motion of 117 rpm rotation and 35.5 rpm revolution. Evaluation was made into the specimen weight difference ratio before and after the test (weight difference / pre-test weight × 100 (%)). Here, with the specimen A, the aggregate scattering resistance was 0.5%, and with the specimen B, the aggregate scattering resistance was 5.0%, and good results were obtained. In particular, it was found from Table 2 that the specimen A having a larger blending amount (addition amount) of the water-dispersible resin of the water-permeable water-retaining resin mortar is smaller in aggregate scattering resistance and better.

  The water permeability measurement test is performed in accordance with the “S025 Field Water Permeability Test Method” in the first volume of the pavement survey and test method manual. Here, the amount of water permeation was 400 ml in 15 seconds for the specimen A, and 1300 ml in 15 seconds for the specimen B, indicating that the specimen had sufficient water permeability. Moreover, it turned out that the direction of the test body B with few compounding quantities of the water-dispersible resin of water-permeable type water retention resin mortar has much water-permeable amount.

  The specimen used for the water-retaining pavement room irradiation test is formed as shown in Table 3 below, and is formed into a square plate with a side of 30 × 30 cm × thickness of 5 cm. . The ratio of the thickness of the water permeable retentive layer 17 and the single grain sand packed layer 15 of the specimen is 3: 7, and the thickness of the permeable water retentive layer 17 is 1.5 cm. Layer 15 is 3.5 cm thick.

  As shown in Table 3, in the specimen C, the asphalt mixture used as a base material has a maximum particle size of 13 mm and a porosity of 25%, and single-grained sand has a particle size of 0.3 to 1.2 mm. Is used. The composition of each material of the water-permeable water-retaining resin mortar is as follows: single-grain sand (particle size: 0.3 to 0.8 mm) 89.3% by weight, water-dispersed resin 8.9% by weight, water 1.8% by weight It has become.

  The water retention pavement indoor irradiation test is performed in accordance with Appendix-1 “Water Retentive Pavement Indoor Irradiation Test Method” in the technical data of the Water Retention Study Group. Specifically, the test is performed using a test apparatus 100 as shown in FIG. The test apparatus 100 includes a lamp 101 installed at a predetermined height, a heat insulating material 103 that covers a peripheral portion and a lower portion of a specimen 102 (specimen C), and a thermocouple 104 provided on the surface of the specimen 102. The thermocouple 104 measures the temperature of the surface of the specimen 102 while irradiating the specimen 102 with the lamp 101.

  The test procedure is as follows. First, specimens 102 and standard pavement specimens (not shown) having the composition shown in Table 3 according to the present invention are prepared, and thermocouples 104 are installed at three places on the surfaces thereof. . And after heat-curing the specimen of a standard pavement, the heat insulating material 103 is provided and heat insulation processing is performed. Thereafter, the lamp 101 is irradiated and the installation height H of the lamp 101 is adjusted.

  When the lamp 101 is installed at a height H at which the surface temperature of the standard pavement specimen becomes 60 ° C. in 2 to 4 hours by irradiation of the lamp 101, the specimen 102 according to the present invention is subjected to water immersion curing. (After 12 hours at 20 ° C.), a heat insulating material 103 (styrene foam) is provided so as to cover the peripheral portion and the lower portion of the specimen 102, and heat treatment is performed. Then, the lamp 101 is irradiated and measurement is started. At this time, it is confirmed that the specimen 102 is in a dry surface state. When the irradiation time reaches 4 hours, the test is terminated. And the surface temperature of the specimen 102 in the irradiation time when the surface temperature of the specimen of standard pavement reached 60 ° C. is obtained, and the temperature difference is evaluated as a temperature reduction effect. In this test, in addition to the specimen 102 according to the present invention, a conventional water-retaining pavement specimen was also prepared and subjected to the same test.

  FIG. 6 shows the test results of the water retention pavement room irradiation test. As shown in FIG. 6, in the specimen C of the water-permeable water-retaining pavement according to the present invention, the surface temperature is about 50 at the time when the surface temperature of the standard pavement reaches 60 ° C. (irradiation time) of 180 minutes. ° C. Moreover, in the conventional water-retaining pavement specimen, the temperature is about 35 ° C. when the elapsed time is 180 minutes. That is, it can be said that the water-permeable type water-retaining pavement specimen according to the present invention cannot obtain the temperature reduction effect of the conventional water-retaining pavement, but can obtain a high temperature reduction effect of about 10 ° C.

[Second Embodiment]
Next, the structure of the water-permeable type water retention pavement for vehicles which concerns on 2nd embodiment is demonstrated. FIG. 7 is a cross-sectional view showing a second best mode for carrying out a water-permeable water-retaining pavement for a roadway according to the present invention.

  As shown in FIG. 7, in the permeable water-retaining pavement 3, a roadbed 11 and a base layer 12 are formed on a roadbed 10 in order from the bottom. The roadbed 11 and the base layer 12 are constructed in the same manner as a conventional road as in the first embodiment.

  On the base layer 12, a spray-type water-permeable water retaining layer 37 having both water permeability and water retaining property is formed. The spray type water permeable retention layer 37 is filled with a single grain sand 34 (see FIG. 9 (d)) in the gap 33a (see FIG. 9 (c)) of the asphalt mixture 33 serving as a base, and is then preliminarily dispersed in water. A binder 38 (see (e) of FIG. 9) obtained by adding and mixing water to the resin is sprayed from the surface of the asphalt mixture 33 and penetrated into the single grain sand 34. A water permeable water retaining resin mortar 39 is formed by spraying a binder 38 on the single grain sand 34, and the water permeable water retaining resin mortar 39 is filled in the gap 33 a of the asphalt mixture 33. Yes. The spray type water permeable water retaining layer 37 thus formed is a layer disposed on the surface of the water permeable water retaining pavement 3 and has a thickness of 30 to 40 mm.

  Similar to the asphalt mixture 13 of the first embodiment, the asphalt mixture 33 is configured by mixing coarse aggregate, fine aggregate, asphalt, and the like at a predetermined ratio, and has a maximum particle size of 20 to 13 mm and a gap. A rate of 20 to 25% is used. Moreover, the single grain sand 34 with which the space part of the asphalt mixture 33 is filled has the particle diameter of 0.2-0.8 mm similarly to the single grain sand 14 of 1st embodiment.

  The binder 38 is formed by adding and mixing water to a water-dispersed resin. As the water dispersion type resin, a water dispersion type epoxy resin or a water dispersion type acrylic resin is used. As shown in Table 4 below, the mixing ratio (% by weight) of the water-dispersed resin and water is such that the ratio of water-dispersed resin: 33.3 to 70% by weight and water: 66.7 to 30% by weight. ing.

As shown in Table 4, the application amount of the binder 38 is 200 to 700 g / m ² .

  Next, the structure of the water-permeable type water-retaining pavement for sidewalks according to the second embodiment will be described. FIG. 8 is a cross-sectional view showing the second best mode for carrying out the water-permeable type water-retaining pavement for sidewalks according to the present invention.

  As shown in FIG. 8, in the permeable water-retaining pavement 4, a roadbed 21 is formed on a roadbed 10. The roadbed 21 is constructed in the same manner as a conventional road as in the first embodiment. Further, the water-permeable water-retaining pavement 4 has a nonwoven fabric 22 laid on the roadbed 21. The nonwoven fabric 22 has a thickness of about 1 mm as in the first embodiment, and has a heat resistance of about 180 ° C.

  On the nonwoven fabric 22, a spray type water permeable water retaining layer 37 is formed. Since this spraying type water permeable retention layer has the same configuration as the water permeable water retention pavement 3 for a roadway, the same reference numerals are given and description thereof is omitted.

  Next, a construction method of the water-permeable water-retaining pavement 3 for a roadway having the above-described configuration will be described with reference to FIGS. 9 and 10.

  First, as shown in FIG. 9A, on the roadbed 10 whose surface is leveled by rolling or the like, the particle size material 11a is laid to a thickness of 200 to 800 mm and rolled. Then, the roadbed 11 is formed to be straightened (Step 2-1 in FIG. 10). Thereafter, as shown in FIG. 9B, the base layer 12 is formed by laying the asphalt mixture 12a on the roadbed 11 in a thickness of 50 to 100 mm and rolling it. (Step 2-2 in FIG. 10). In addition, when constructing the water-permeable type water-retaining pavement 4 for sidewalks, as shown in FIG. 8, a nonwoven fabric 22 is laid on a roadbed 21 having a thickness of 100 to 150 mm.

  Then, as shown in FIG. 9C, the base asphalt mixture 33 is laid on the base layer 12 with a predetermined thickness in the range of 30 to 40 mm (Step 2-3 in FIG. 10). Here, the asphalt mixture 33 has a maximum particle size of 20 to 13 mm and a porosity of 20 to 25%.

  After that, as shown in FIG. 9 (d), when the temperature of the laid asphalt mixture 33 is lowered to room temperature (about the same as the air temperature), the surface of the asphalt mixture 33 is vibrated using a vibration roller or the like, The voids 33a (see FIG. 9C) of the asphalt mixture 33 are filled with the single-grain sand 34 while being sprinkled (Step 2-4 in FIG. 10). At this time, the vibration is not directly applied to the single grain sand 34 but is applied to the surface of the asphalt mixture 33.

  Meanwhile, a binder 38 (see FIG. 9 (e)) is formed in advance by adding and mixing water to a water-dispersed resin made of a water-dispersed epoxy resin or a water-dispersed acrylic resin (see FIG. 9 (e)). 10 Step 2-5).

  And as shown to (e) of FIG. 9, the sprayer 35 grade | etc., Sprays the binder 38 from the surface of the asphalt mixture 33, and is made to infiltrate into the single grain sand 34 (Step2-6 of FIG. 10). At this time, the single grain sand 34 is not compacted, and since the binder 38 is in a liquid state, it penetrates into the single grain sand 34 smoothly. The sprayer 35 is preferably a gear type airless sprayer, not a sprayer using compressed air. According to this, it is possible to prevent the single grain sand 34 from being scattered by the compressed air.

  Through the above steps, the water-permeable water-retaining pavement 3 shown in FIG. 7 is completed. According to the construction method and configuration as described above, in addition to the effect of being able to obtain both a high water retention function and a water permeability function over the entire water-permeable type water-retaining pavement 3, the following effects can be obtained. can get. According to the present embodiment, since the binder 38 is formed by adding and mixing water to the water-dispersed resin, the viscosity is low. Therefore, by spreading the binder 38 from the surface of the asphalt mixture 33, it is possible to form the spray type water-permeable water retaining layer 37 by infiltrating the single grain sand 34, which greatly reduces the labor and time required for construction. Can be reduced. Furthermore, the thickness of the spray type water permeable retention layer 37 formed by the permeation of the binder 38 can be ensured larger than that of the first embodiment, and a uniform layer (spread type water permeable retention layer 37) is constructed. Therefore, the water permeability and water retention of the water-permeable type water-retaining pavement 3 can be further enhanced.

  Below, the physical property test done using the test body comprised with the dispersion | distribution type water-permeable water retaining layer 37 which concerns on this embodiment is demonstrated. Here, a test for measuring the water permeability and a test for measuring the water absorption rate were performed.

  The specimen used for the water permeation amount test is formed as shown in Table 5 below, and is formed in a square plate shape with a side of 30 × 30 cm × thickness of 3 cm.

As shown in Table 5, two specimens are used in the test. The asphalt mixture used as the base material of each specimen is one having a maximum particle size of 13 mm and a porosity of 25%. Single-grain sand is No. 6 cinnabar with a particle size of 0.2 to 0.4 mm, and a particle size of 0.1 mm. No. 5 cinnabar of 3 to 0.8 mm is used. One specimen D (single grain sand No. 6 cinnabar sand) is composed of 70% by weight of water-dispersible resin and 30% by weight of water-dispersing resin, and the amount of the binder 38 applied is as follows. 350 g / m ² , and the other specimen E (single-grain sand 34 is No. 5 cinnabar) is composed of 70% by weight of water-dispersed resin and 30% by weight of water. The spread amount of the binder 38 is 200 g / m ² .

  The water permeability measurement test is performed in accordance with the “S025 Field Water Permeability Test Method” in the first volume of the pavement survey and test method manual. Here, the amount of water permeation was 250 ml in 15 seconds for Specimen D, and 700 ml in 15 seconds for Specimen E, indicating that it had sufficient water permeability. Further, it was found that the specimen E having a larger particle size of the single grain sand 34 filled in the void portion 33a of the asphalt mixture 33 has a larger water permeability.

  The specimen used for the water absorption rate test is formed with the formulation shown in Table 6 below, and is formed in a cylindrical shape having a diameter of 10 cm and a thickness of 3 cm.

As shown in Table 6, two specimens are used in the test. The asphalt mixture used as the base material of each specimen is one having a maximum particle size of 13 mm and a porosity of 25%. Single-grain sand is No. 6 cinnabar with a particle size of 0.2 to 0.4 mm, and a particle size of 0.1 mm. No. 5 cinnabar of 3 to 0.8 mm is used. In the specimen F in which the single grain sand 34 is No. 6 dredged sand and the specimen G in which the single grain sand 34 is No. 5 dredged sand, the blending of each material constituting the binder 38 is water-dispersed resin: 33.3 % By weight, water: 66.7% by weight, and the application amount of the binder 38 is 700 g / m ² .

  The water absorption rate test is conducted in accordance with the “Maximum water absorption rate test method for water retaining materials” in the third volume of the pavement survey and test method manual. As shown in FIG. 11, in the specimen F, the water absorption rate rapidly increased to about 83% in 5 minutes after the start of the test, and then gradually increased until 60 minutes passed. About 93%. On the other hand, in the specimen G, the water absorption rate rapidly rises to about 88% 5 minutes after the start of the test, and then gradually rises to about 100% after 60 minutes. As mentioned above, in the water-permeable type water retention pavements 3 and 4 of this embodiment, sufficient water absorption was obtained.

[Third embodiment]
Next, the structure of the water-permeable water-retaining pavement for vehicles which concerns on 3rd embodiment is demonstrated. FIG. 12 is a cross-sectional view showing the third best mode for carrying out a water-permeable water-retaining pavement for a roadway according to the present invention.

  As shown in FIG. 12, in this water-permeable water-retaining pavement 5, a roadbed 11 and a base layer 12 are formed on a roadbed 10 in order from the bottom. The roadbed 11 and the base layer 12 are constructed in the same manner as a conventional road as in the first and second embodiments.

  On the base layer 12, a mixed-type water-permeable water retaining layer 55 having both water permeability and water retaining property is formed. The mixed-type water permeable retention layer 55 forms a pavement 51 by mixing coarse aggregate 53, fine aggregate such as single grain sand, and a binder obtained by adding and mixing water in advance to water-dispersed resin. The pavement material 51 is formed by laying on the roadbed or the base layer 12 (on the roadbed 21 in the case of a sidewalk). The mixed type water permeable water retaining layer 55 is a layer disposed on the surface of the water permeable water retaining pavement 5 and has a thickness of 30 to 40 mm. In addition, the mixed-type water-permeable water retaining layer 55 is completed, and the fine aggregate and the binder constitute a water-permeable water-borne resin mortar 54. The gap 53 is filled in the aggregate 53.

  As the coarse aggregate 53, No. 6 crushed stone having a particle size of 5 to 13 mm or No. 7 crushed stone having a particle size of 2.5 to 5 mm is used. As the fine aggregate, single grain sand (No. 6 cinnabar or No. 5 cinnabar) having a particle diameter of 0.2 to 0.8 mm is used. As the water-dispersed resin, a water-dispersed epoxy resin or a water-dispersed acrylic resin is used, and a binder is formed by adding and mixing water in advance. As shown in Table 7 below, the mixing ratio of the water-dispersed resin and water is such that the water-dispersed resin is 76.9 to 83.3 wt% and the water is 23.1 to 16.7 wt%. It has become.

  Moreover, the ratio (volume mixing ratio) of the coarse aggregate 53, the fine aggregate, the binder, and the amount of air to be mixed is as follows: coarse aggregate: 45-50%, fine aggregate: 20-30%, binder: 4-10 %, Air amount: 15 to 25%.

  Next, the structure of the water-permeable type water-retaining pavement for sidewalks according to the third embodiment will be described. FIG. 13: is sectional drawing which showed the best 3rd form for implementing the water-permeable type water retention pavement for sidewalks concerning this invention.

  As shown in FIG. 13, in the water-permeable water-retaining pavement 6, a roadbed 21 is formed on the roadbed 10. The roadbed 21 is constructed in the same manner as a conventional road with a thickness of 100 to 150 mm, as in the first and second embodiments. In this embodiment, no nonwoven fabric is laid. This is because even if the mixed-type water-permeable retaining layer 55 is formed on the roadbed 21, it has an appropriate viscosity as a mixture, so that the fine aggregate component does not flow out.

  On the roadbed 21, a mixed type water permeable water retaining layer 55 is formed. Since this mixed-type water-permeable water retaining layer 55 has the same configuration as the water-permeable water-retaining pavement 5 for roadways, the same reference numerals are given and description thereof is omitted.

  Next, a construction method for the water-permeable water-retaining pavements 5 and 6 according to the third embodiment will be described with reference to FIG.

  As shown in FIG. 14, first, a particle size material is laid to a thickness of 100 to 150 mm (for sidewalks) or 200 to 800 mm (for roadways) on a roadbed whose surface is leveled by rolling or the like. Then, the roadbed is adjusted and formed by rolling (Step 3-1). This process is carried out in the same way as normal road construction. In the case of a water-permeable type water-retaining pavement for a roadway, a base layer made of an asphalt mixture is formed on the roadbed with a thickness of 50 to 100 mm.

  Thereafter, the coarse aggregate and the fine aggregate are dry-mixed (Step 3-2). The dry mixing is performed for about 30 seconds so that the coarse aggregate and the fine aggregate can be uniformly dispersed. The mixing time is determined by the amount of coarse aggregate and fine aggregate, and is not limited to 30 seconds. Here, the coarse aggregate is No. 6 crushed stone or No. 7 crushed stone, and the fine aggregate is No. 6 cinnabar or No. 5 cinnabar, which are blended so as to have the ratio shown in Table 7. .

  Separately from this dry mixing, mixing of the main component of water-dispersed epoxy resin and a curing agent (appearance is a red liquid as a main component and a light yellow transparent liquid as a curing agent) was performed for about 30 seconds (Step 3-3). Water is added to the water-dispersed resin and mixed for about 30 seconds (Step 3-4) to form a binder. The mixing time is not limited to 30 seconds as long as the main component and the curing agent of the water-dispersible resin or the water-dispersible resin and water can be uniformly dispersed.

  Thereafter, a binder is added to the aggregate obtained by mixing the coarse aggregate and the fine aggregate, and the mixture is wet-mixed over about 90 seconds (Step 3-5) to form a paving material. The mixing time is determined so that the aggregate and binder are uniformly dispersed, and the aggregate, binder, and air amount are in the ratio shown in Table 7, and is not limited to 90 seconds. Absent.

  Then, the pavement material is discharged onto the roadbed or the base layer and leveled by human power or asphalt finisher (Step 3-6). Then, using the roller and the vibro plate, the leveled paving material is rolled (Step 3-7) to form a mixed type water-permeable water retaining layer 55 having a thickness of 30 to 40 mm (see FIGS. 12 and 13). Then, the permeable type water-retaining pavement 5 (see FIG. 12) or the permeable type water-retaining pavement 6 (see FIG. 13) is completed by curing for about one day (Step 3-8).

  According to the construction method and configuration as described above, a coarse aggregate 53, a fine aggregate such as single grain sand, and a binder obtained by adding and mixing water in advance to a water-dispersed resin are mixed to create a pavement material. The mixed type water permeable water retaining layer 55 is formed by a simple operation such as forming 51 and laying the pavement material 51, and a high water retaining function and a water permeable function are obtained over the entire water permeable water retaining pavement. In addition to the effect of being able to perform the operation, the effect of being able to significantly reduce the labor and time required for construction can be obtained.

  In particular, since water is added to and mixed with the water-dispersible resin to form a binder, the binder has a low viscosity, and the binder can be uniformly dispersed throughout the coarse aggregate and fine aggregate. The mixed type water permeable water retaining layer 55 having a uniform cross section can be constructed from the surface to the entire bottom surface of the mixed type water permeable water retaining layer 55, and a uniform water retaining function and water permeable function can be obtained.

  Below, the physical property test done using the test body comprised by the mixed type water-permeable water retention layer 55 which concerns on this embodiment is demonstrated. Here, the aggregate scattering resistance test, the test for measuring the water permeability and the water permeability coefficient, the test for measuring the water absorption quantity, and the water retention pavement room irradiation test were performed.

  The specimens used in the aggregate scattering resistance test and the water permeability test were formed as shown in Table 8 below, and were formed in a square plate shape with a side of 30 × 30 cm × thickness of 3 cm. Something is used.

  As shown in Table 8, two specimens are used in the test. The coarse aggregate of each specimen is No. 6 crushed stone having a particle size of 5 to 13 mm, or No. 7 crushed stone having a particle size of 2.5 to 5 mm, and the fine aggregate has a particle size of 0.2 to 0.8 mm. Single grain sand (No. 6 cinnabar or No. 5 cinnabar) is used.

  One specimen H (combination name: 2.5% by weight of binder) has a volume mixing ratio of each material: coarse aggregate: 49.4%, fine aggregate: 23.7%, binder: 4.6% The amount of air is 22.4%. The blending ratios of the binder are water-dispersed resin: 83.3% by weight and water: 16.7% by weight. The other specimen I (combination name: binder 5.0% by weight) has a volume mixing ratio of each material of coarse aggregate: 49.3%, fine aggregate: 23.6%, binder: 9.2% Air amount: 17.9%. The blending ratios of the binder are water-dispersed resin: 83.3% by weight and water: 16.7% by weight.

  In the aggregate scattering resistance test, a rubber hose stipulated by the International Slurry Surfing Association (ISSA) is horizontally installed on the specimen using a tester according to a known wet track abrasion tester. The rubber hose was loaded at 5 kg, and the aggregate hose resistance was obtained by performing continuous operation for a specified time with a planetary motion of 117 rpm rotation and 35.5 rpm revolution. Evaluation was made into the specimen weight difference ratio before and after the test (weight difference / pre-test weight × 100 (%)). Here, with the specimen H, the aggregate scattering resistance was 0.1%, and with the specimen I, the aggregate scattering resistance was 0.0%, and good results were obtained. Moreover, in the compounding quantity (addition amount) of the binder shown in Table 8, the specimen H and the specimen I showed the same level of aggregate scattering resistance.

The water permeability measurement test is performed in accordance with the “S025 Field Water Permeability Test Method” in the first volume of the pavement survey and test method manual. Here, the water permeability was 1250 ml in 15 seconds for the specimen H, and 650 ml in 15 seconds for the specimen I, and it was found that the water permeability was sufficient. Further, it was found that the specimen H having a larger amount of air has a larger water permeability. The permeability coefficient was 1 × 10 ⁻¹ for the specimen H and 4 × 10 ⁻² for the specimen I, and it was found that the permeability was sufficient. Moreover, it turned out that the direction of the test body I with much compounding quantity (addition quantity) of a binder has a small water permeability coefficient.

  The water absorption test is performed in accordance with “B012 Open-Grade Asphalt Mixture Permeability Test Method” in the first volume of the pavement survey and test method manual. As shown in FIG. 15, the results of the water absorption amount test show that in the specimen H, the water absorption amount suddenly increased to about 110 g in 5 minutes after the start of the test, and then gradually increased to about 30 minutes after 30 minutes. 130 g. On the other hand, in the specimen I, the water absorption rapidly increased to about 100 g in 5 minutes after the start of the test, and then gradually increased to about 125 g after 30 minutes. In the conventional water-retaining pavement, the water absorption rapidly rises to about 75 g 5 minutes after the start of the test, and then gradually rises to about 150 g after 30 minutes. As described above, the water-retaining pavement 5 and 6 according to the present embodiment can finally obtain a sufficient water absorption amount in a short time, although the water-retaining pavement of the conventional type has a larger amount of water absorption. So puddles are less likely to occur. Further, it was found that the specimen I having a larger binder content (added amount) had a lower water absorption.

  The water-retaining pavement room irradiation test is performed in accordance with Appendix-1 “Water Retentive Pavement Room Irradiation Test Method” of the water-retaining research group technical data, as in the first embodiment. As shown in FIG. 16, the test result of the water retention pavement room irradiation test is as follows. In the specimen H, the surface temperature is about 52 at the time when the standard pavement surface temperature reaches 60 ° C. (irradiation time) of 180 minutes. It is about 50 degreeC in the sample I at the degree C. Moreover, in the conventional water-retaining pavement specimen, the temperature is about 40 ° C. when the elapsed time is 180 minutes. That is, in the specimen of the water-permeable type water-retaining pavement according to the present invention, the temperature reduction effect of the conventional water-retaining pavement is not obtained, but it can be said that a high temperature reduction effect of about 8 to 10 ° C. was obtained.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and can of course be changed as appropriate without departing from the spirit of the invention.

It is sectional drawing which showed the best 1st form for implementing the water-permeable type water retention pavement for roadways which concerns on this invention. It is sectional drawing which showed the best 1st form for implementing the water-permeable type water retention pavement for sidewalks concerning this invention. (A) thru | or (e) are process sectional drawings which showed the best 1st form for implementing the construction method of the water-permeable type water retention pavement which concerns on this invention. It is the flowchart figure which showed the best 1st form for implementing the construction method of the water-permeable type water retention pavement which concerns on this invention. It is the block diagram which showed the water retention pavement room irradiation test apparatus. It is the graph which showed the relationship between the elapsed time in an indoor irradiation test, and surface temperature. It is sectional drawing which showed the best 2nd form for implementing the water-permeable type water-retaining pavement for roadways which concerns on this invention. It is sectional drawing which showed the 2nd best form for implementing the water-permeable type water retention pavement for sidewalks concerning this invention. (A) thru | or (e) are process sectional drawings which showed the best 2nd form for implementing the construction method of the water-permeable type water retention pavement which concerns on this invention. It is the flowchart figure which showed the best 2nd form for implementing the construction method of the water-permeable type water retention pavement which concerns on this invention. It is the graph which showed the relationship between the elapsed time and the water absorption rate in a water absorption rate test. It is sectional drawing which showed the best 3rd form for implementing the water-permeable type water-retaining pavement for roadways which concerns on this invention. It is sectional drawing which showed the 3rd best form for implementing the water-permeable type water retention pavement for sidewalks concerning this invention. It is the flowchart figure which showed the best 3rd form for implementing the construction method of the water-permeable type water retention pavement which concerns on this invention. It is the graph which showed the relationship between the elapsed time and the water absorption rate in a water absorption rate test. It is the graph which showed the relationship between the elapsed time in an indoor irradiation test, and surface temperature.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water-permeable type water-retaining pavement 2 Water-permeable type water-retaining pavement 13 Asphalt mixture 13b Cavity 14 Single grain 16 Water-permeable water-retaining resin mortar 17 Water-permeable water-retaining layer 22 Non-woven fabric 3 Water-permeable type water-retaining pavement 4 Water-permeable type water-retaining pavement 33 Asphalt mixture 33a Cavity 34 Single grain sand 37 Spray type water permeable water retaining layer (water permeable water retaining layer)
39 Water permeable water retaining resin mortar 5 Water permeable water retaining pavement 6 Water permeable water retaining pavement 51 Pavement material 53 Coarse aggregate 55 Mixed type water permeable water retaining layer (water permeable water retaining layer)

Claims (6)

It is a water-permeable type water-retaining pavement that combines water permeability and water retention,
A water-permeable resin mortar made by mixing a water-dispersible resin with water added and mixed with fine aggregates such as single-grained sand is used as a base for the asphalt mixture or coarse aggregate voids. A water-permeable type water-retaining pavement characterized in that it is filled with a water-permeable water-retaining layer. The water-permeable water-retaining pavement according to claim 1, wherein the water-dispersed resin is made of a water-dispersed epoxy resin or a water-dispersed acrylic resin. A construction method of a water-permeable water-retaining pavement that has both water-permeability and water-retention ability,
Laying the base asphalt mixture on the roadbed or base layer,
While applying vibration to the surface of this asphalt mixture, filling the voids of the asphalt mixture with single grain sand,
A portion of the single grain sand is removed by suction at a predetermined thickness from the surface of the asphalt mixture;
A water-dispersible resin mortar is formed by mixing a binder formed by adding and mixing water in advance with a water-dispersible resin, and mixing with fine aggregate such as single grain sand.
The construction method of a water-permeable type water-retaining pavement, characterized by rubbing the water-permeable type water-retaining resin mortar into a void on the surface of the asphalt mixture from which the single-grain sand has been removed by suction. A construction method of a water-permeable water-retaining pavement that has both water-permeability and water-retention ability,
Laying the base asphalt mixture on the roadbed or base layer,
While applying vibration to the surface of this asphalt mixture, filling the voids of the asphalt mixture with single grain sand,
A method of constructing a water-permeable water-retaining pavement, characterized in that a binder formed by adding and mixing water to a water-dispersed resin in advance is sprayed from the surface of the asphalt mixture and permeated into the single grain sand. The construction method for water-permeable water-retaining pavement according to claim 3 or 4, wherein the asphalt mixture is laid after laying a nonwoven fabric on the roadbed. A construction method of a water-permeable water-retaining pavement that has both water-permeability and water-retention ability,
Coarse aggregates, fine aggregates such as single grain sand, and a binder formed by adding and mixing water in advance with water-dispersed resin to form a paving material,
A method for constructing a water-permeable water-retaining pavement, wherein the pavement material is laid on a roadbed or a base layer.

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