WO2010061905A1

WO2010061905A1 - Road surfacing, method of constructing road surfacing, and concrete form

Info

Publication number: WO2010061905A1
Application number: PCT/JP2009/069999
Authority: WO
Inventors: 典明柴田; 俊幸糀谷
Original assignee: 株式会社ブリッジ
Priority date: 2008-11-28
Filing date: 2009-11-27
Publication date: 2010-06-03
Also published as: CN102227534A; CN102227534B; DE112009003630T5; HK1162061A1; JPWO2010061905A1; KR20110106860A; KR101444989B1; JP5258898B2; US20110229262A1

Abstract

Provided is road surfacing which can efficiently drain water and simultaneously retain some of the water when it is raining so as to prevent a large amount of water from being drained, and supply the retained water to a surface layer when the sun is shining, and draw water from the subgrade to reduce the temperature of the surface layer. To this end, a porous aggregate mixture (a) formed by mixing materials including a porous material and a cement based solidification material is laid to constitute a middle layer part (12), and then an asphalt mixture (b) having a water permeability function is laid to form a surface layer part (11), so as to construct a road bed (1a) which acts as road surfacing (1).

Description

Pavement, pavement construction method and concrete formwork

The present invention relates to a pavement having enhanced water retention and water permeability using a porous mixture, a pavement construction method, and a concrete formwork.

As a pavement having water retention and water absorption, the one shown in Patent Document 1 is known. The pavement described in this document is composed of at least a surface layer, a roadbed, and a roadbed in order from the top, and the surface layer retains water in the voids of the pavement layer formed to a predetermined thickness by open grain asphalt. Fill with water-retaining cement milk to make a water-retaining surface layer. Next, the roadbed is a water-retaining roadbed layer that is thicker than the surface layer using aggregates with countless small holes to retain water, and a large amount of water is obtained by combining the water-retaining surface layer and the water-retaining roadbed layer. Keep water.

Further, for example, the one shown in Patent Document 2 is known as a pavement that can exhibit the effect of reducing the pavement surface temperature.

The pavement described in the same document relates to a road pavement structure in which a water-permeable pavement member having a void inside is laid as a road pavement. The pavement portion of the road pavement structure is composed of a water permeable layer made of a water permeable pavement member and a water retention layer in which the water permeable pavement member is impregnated with a water retention member, and the water permeable layer or the water retention layer is in a plane direction of the road surface To be dispersed.

JP 2008-156944 Japanese Patent Laid-Open No. 2002-250001

However, with the configuration of Patent Document 1, when the amount of water retained is exceeded, there is a problem that excessive water overflows on the road surface. In addition, if the moisture retention water evaporates, artificial heat stored in the surface layer and solar heat will be released, causing a heat island phenomenon that raises the outside air temperature.

On the other hand, in the configuration of Patent Document 2, a water-permeable pavement member is laid on the roadbed portion, and then the surface of the water-permeable pavement portion is dispersed in a plane direction and impregnated with a water retention slurry material. It is very troublesome.

In addition, as in the past, surface drainage pavement in which the slope in the road width direction is applied at the same slope at a constant distance from the center to both ends, and the slope of the remaining distance is steeper than the above slope. In the case of the structure, even if surface pavement is provided with water-retaining pavement, and water-permeable pavement is applied, excessive water exceeding the water retention and water-permeable range flows into the sewer main at once, There is a problem that the drainage capacity of the pipe may be exceeded and there is a possibility of reverse flow, and there is a problem that a traffic obstacle occurs when a bicycle or a motorcycle passes through the roadside belt.

The present invention aims to drastically solve the above-mentioned problems by reviewing the materials used for the pavement and the structure of the pavement.

In the present invention, in order to achieve such an object, the following measures are taken.

That is, the pavement of the present invention is composed of at least these two layers in which a porous aggregate mixture obtained by mixing a porous material and a cement-based solidified material is laid and a surface layer material having a water permeable function is laid. It is characterized by that.

If constituted in this way, the pavement has water retention and water permeability, can store water in the upper part of the road bed, and can also soak water in the road bed appropriately. Therefore, drainage is improved during rain, and water is stored in the pavement to reduce excessive water wrapping around the roadbed, and when the sun continues, the water stored in the pavement is sucked up. Furthermore, since water is sucked up from the road bed through the pavement, the temperature rise of the surface layer can be effectively suppressed.

At that time, in order to adjust the amount of water permeation to the roadbed soil to a sufficient amount, a semi-water-impervious film having both water permeability and barrier function is formed at the boundary between the porous aggregate mixture and the roadbed below. It is desirable to keep it.

It is effective to incline the semi-water-impervious film in the direction of the drain pipe in order to properly guide the excessive water to the drainage facility.

In order to eliminate streets, do not create a transverse gradient from the center in the width direction to each end, and lay the surface layer material from one end to the other end in the width direction in a flat manner to configure the pavement surface of the road It is desirable.

As another configuration for realizing the same purpose, a surface layer material having a water permeable function is given a certain transverse gradient from the center to one end and from the center to the other end in the width direction. The thing which comprises the pavement surface of a road is mentioned.

In addition, it is desirable to incline the semi-water-impervious film in the direction of the drain pipe in order to allow excess water to flow to the drainage facility.

In order to alleviate the “remixing” phenomenon, which is a concern when rainwater that has penetrated to the deepest part enters the roadbed and becomes muddy by vibration from the surface layer, cemented solidified material is used as the porous material. Desirably, a crushed stone roadbed is laid at the bottom of the porous aggregate mixture in which a mixture of materials such as a solidified material is not contained.

In order to implement the present invention at low cost and contribute to ecology through reuse of industrial waste, it is desirable to use clinker ash for the porous material.

In order to lay a paved body without excavating the roadbed of the current road, the current pavement is removed to expose the roadbed, and the middle layer part made of a porous aggregate mixture and a surface layer material with water permeability It is preferable to construct the pavement by sequentially constructing the surface layer portion composed of

In order to construct an effective pavement by new construction, a base layer part made of a porous material not containing a mixture such as a solidified material, a second middle layer part made of a crushed stone roadbed, and a middle layer part made of a porous aggregate mixture It is preferable to construct a pavement by constructing a surface layer portion made of a surface material having a water permeability function from the bottom to the top sequentially.

Further, the concrete formwork according to the present invention is formed by molding a porous aggregate mixture in which a porous material and a cement-based solidified material are mixed into a plate shape, and concrete is placed inside, It is backfilled as part of a concrete structure.

If such a formwork is used, the same formwork has excellent water permeability as well as water absorption, and it discharges excess water generated during placing of ready-mixed concrete to the outside and is necessary for hardening by a water retention function. It is possible to secure the hardness of the concrete structure by stopping the moisture inside the mold and gradually supplying it to the inside according to the reaction heat at the time of hardening of the concrete. In addition, bleeding water, which is strong alkaline water, is difficult to treat, such as neutralization with sulfuric acid, when the ready-mixed concrete is cast, but the concern is resolved by keeping most of it inside the mold. The

Furthermore, the pavement other than the above of the present invention forms a middle layer portion by laying a porous mixture in which a porous material and a cement-based solidifying material are mixed on a concrete floor slab overhanging with respect to a foundation portion, Further, a surface layer portion is formed by laying a surface layer material, thereby forming a roadbed having water absorption and water permeability in a train platform.

Although the temperature rises on the train platform due to the influence of the outside air temperature, the heat storage of the train body, etc., in summer, the place where direct heat is blocked, such a pavement 5 having water retention and water permeability If it is laid, it is possible to suppress the surrounding temperature rise.

In the present invention, as described above, the pavement is formed of a material having water retention and water permeability, and water can be appropriately infiltrated into the road floor as well as water retention. Even when water is not supplied to the roadbed for a long time due to sunshine or the like, water can be sucked from the roadbed and the temperature rise of the surface layer can be suppressed. In addition, it can absorb moisture from any location on the surface asphalt, and can retain water at any location, so that it can be drained and has a structure that does not cause a puddle, etc. Can provide a pavement that prevents a large amount of water from flowing into the drainage channel at a stretch and prevents a large amount of water from flowing into the water distribution pipe.

Sectional drawing which shows the pavement which concerns on 1st Embodiment of this invention. Sectional drawing which shows the example of expansion | deployment to the road by the pavement. Sectional drawing which shows the pavement which concerns on 2nd Embodiment of this invention. The figure which shows the other example of application of the pavement of this invention. The figure which shows the other application example of the pavement of this invention. Sectional drawing which shows the other application example of the porous aggregate mixture of this invention Sectional drawing which shows the structure of the conventional pavement.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)

FIG. 1 shows the present embodiment which can be applied to roads of so-called L traffic {less than 100 (vehicles / day / direction)}, and consequently roads of B traffic {250 to less than 1000 (vehicles / day / direction)}. This shows a pavement cross section of the pavement 1, and has a water permeability function after laying a middle layer portion 12 composed of a porous aggregate mixture a in which clinker ash (CA), which is a porous material, and cement-based solidified material are mixed. The surface layer portion 11 made of the material b is provided, and the roadbed 1a is configured by these two layers.

Clinker ash is contained in coal ash generated after high-temperature combustion (1300 ° C) of finely pulverized coal at thermal power plants and steelworks, etc., and the burned particles agglomerate in the boiler. However, it has been dropped and accumulated in the water tank at the bottom of the boiler, and the rest is called fly ash. Both were previously disposed of as industrial waste. Since the clinker ash has a large number of micropores and a large surface area, the clinker ash is very lightweight and excellent in water permeability, and also has a high water holding capacity capable of storing about 40% of the volume of water. Therefore, in the present embodiment, clinker ash is used for the pavement 1 in order to recycle resources in order to give the road a drainage function and a water suction function. Since this clinker ash is mostly composed of silica, alumina, etc., the aggregate strength is strong and there is no fear of strength after use (after addition). In the present embodiment, among the coal ash discharged in this manner, a porous aggregate mixture a in which at least a cement-based solidified material is kneaded with clinker ash having a specific particle size is used by compaction. The mixing ratio is, for example, 1: 0.14 to 0.15. When mixing, clinker ash is burned at a high temperature, so there is no organic matter (plant roots, bacteria, etc.) in the material, and there is an advantage of facilitating the reaction of the solidified material mixed at the time of use (processing) is there.

Fly ash also contains silica and alumina, but it is a powder that adheres to the wall of the boiler. It is too fine and solidifies in a clogged state when the cement-based solidified material is kneaded. Since water permeability and water retention cannot be expected, clinker ash having a larger particle size is employed.

Clinker ash has excellent water retention and water absorption properties, so it contains moisture even when left standing. However, if it contains moisture, it becomes hardened when it is kneaded with the cement-based solidified material, and the eyes are closed. If there is little moisture, the solidification becomes insufficient and the strength becomes insufficient. Therefore, it is necessary to solidify the porous aggregate mixture a by introducing the necessary moisture (fresh water) and the admixture and allowing the cement-based solidifying material to proceed without clogging the eyes.

As a preferred embodiment in this case, the clinker ash as the main material has a particle size of 20 mm or less (however, 0.074 mm or less is within 5% of the total), and the mixing ratio of the porous aggregate mixture a ( The dry soil weight ratio) is the main material clinker ash: cement-based solidified material = 1: 0.07 to 0.2, and the porous aggregate mixture a is mixed with fresh water 0.18 to 0.25, and an admixture. (150-200 / 1 dilution) is used by adding it with a test to confirm that it is extremely effective.

This makes it possible to obtain a solidified aggregate of the porous aggregate mixture a having the required strength while maintaining water retention and water permeability.

However, although the above-mentioned porous aggregate mixture a has strength, it is sufficient to be directly applied as a surface layer material on a paved road through which a heavy load truck such as B traffic passes. Is not good. In other words, there are still problems in the strength such as abrasion resistance, and from the grain shape of the material, in order to overcome this, it is necessary to input a large amount of solidifying material and knead with an expensive admixture, which is necessary for maintenance. This is because there are many problems. Therefore, in the present embodiment, the asphalt mixture b is laid as the surface layer material on the surface layer portion 11, and the middle layer portion 12 made of the porous aggregate mixture a using clinker ash is employed immediately below the surface layer. The roadbed 1a is configured.

The asphalt mixture b employs a water-permeable asphalt mixture in which the aggregate is mixed with a part of so-called water-permeable asphalt having high water permeability and the strength is improved.

Regarding the pavement thickness, in this embodiment, the middle layer portion 12 made of clinker ash mixture is 100 to 300 mm, and the surface layer portion 11 made of asphalt mixture is 40 to 50 mm. The pavement thickness of all layers is set to be approximately the same as the construction thickness of a normal asphalt mixture. Therefore, the existing pavement (asphalt) is removed to expose the roadbed A, and the construction is completed simply by sequentially constructing the middle layer portion 12 and the surface layer portion 11 there, without discharging general earth and sand by excavation. Construction can also be performed while avoiding disturbing the roadbed surface. Of course, when a new road is constructed, the thickness can be set to an optimum value in consideration of water permeability and the like, and it is not always a requirement to lay the roadbed of the current road without excavation. When performing a new construction, the structure shown in FIG. 3 described later is also effective.

Moreover, in this embodiment, the semi-water-impervious film 13 is disposed at the boundary between the middle layer portion 12 made of the porous aggregate mixture a and the road bed A below the middle layer portion 12. Since this semipermeable membrane 13 uses an asphalt emulsion that can be sprayed and mixed at normal temperature on the roadbed A, it is formed in the previous stage of constructing the middle layer portion 12 on the roadbed A, and the water toward the roadbed A is drained. It is designed not to completely block water but to allow some water to pass through. Asphalt emulsions can be sprayed and mixed at room temperature, so they are extremely safe because they are less environmentally friendly and save energy and reduce CO2, compared to conventional methods, and are less likely to cause fires. Then, when laying, such a semi-water-impervious film 13 is constructed so as to incline about 2 to 3 ° in the direction of the drainage pipe B buried on the side of the road, and excess water that does not permeate is drained from the drainage pipe B. It is sent to the facility C.

The pavement 1 of the present embodiment configured as described above has a water permeability function after laying a porous aggregate mixture a in which a porous material and a cement-based solidified material are mixed to configure the middle layer portion 12. The asphalt mixture b is laid to form the surface layer portion 11 to form the roadbed 1a. Thus, since the concrete mixture b having a water permeability function is used for the surface layer portion 11 and the porous aggregate mixture a is used for the middle layer portion 12 immediately below the concrete mixture b, the roadbed la made of these has water retention and water permeability. Therefore, water can be appropriately infiltrated also into the road bed A under the two

layers

11 and 12. For this reason, even when the water retained in the middle layer portion 12 is sucked up through the surface layer portion 11 during drying and the sun continues and no water is supplied to the roadbed la composed of both

layer portions

11 and 12, the roadbed A Thus, moisture can be sucked up and the temperature rise of the surface layer portion 11 can be suppressed. Therefore, as compared with the conventional pavement structure that completely blocks the water from flowing into the roadbed A, the heat island phenomenon can be effectively prevented, and thus greatly contributes to CO2 reduction.

In addition, even when the rainfall increases, the water absorption and water permeability are excellent, so that moisture can be absorbed from any location of the surface layer portion 11 and water can be retained at any location. Since a large amount of water does not flow into the groove B at a stretch, it prevents a large amount of water from flowing into the drainage facility C and is extremely effective as a disaster countermeasure such as urban flood damage or landslide due to slope failure. In this pavement 1, if the amount of precipitation per hour is about 70 mm, there is no need for surface drainage, water will penetrate into the pavement 1 and further to the roadbed A, and clinker ash will be 40% or more of the volume. It is possible to retain water, and excess water that exceeds a certain amount of rain can be drained by installing drainage drains B etc. at regular intervals, so as a puddle etc. In addition, the possibility of moisture remaining in the surface layer portion 11 can be effectively reduced.

In addition, the pavement 1 of the present embodiment forms a semi-water-impervious film 13 having both a water-permeable function and a blocking function at the boundary between the middle layer portion 12 and the road bed A below the porous aggregate mixture a. Therefore, it is possible to moderately adjust the water covering to the roadbed A and the poor drainage on the roadbed 1a.

In particular, since the semi-water-impervious film 13 is inclined in the direction of the drainage pipe B, if it is configured to allow excess water to flow into the drainage facility C or the like, after an appropriate amount of water has permeated the roadbed A, The remaining water will flow smoothly in the direction of the drainage pipe B along the slope, the water will not remain in the surface layer part 11, some water will soak into the roadbed A, and the excess water will be appropriate Will be drained.

As described above, since the poor drainage is eliminated, as shown in FIG. 2, the asphalt mixture which is a surface layer material is formed on the surface layer portion 11 without applying a transverse gradient from the center 11a in the width direction of the road to each end 11b. The road pavement surface can be constructed by laying b flat. That is, in the conventional road pavement 31 shown in FIG. 7, it was thought that water sneaking around the roadbed A was not allowed, so an oily film was formed between the pavement 31 and the roadbed A. In addition to the structure that blocks water permeation, a cross slope of about 2% lowering is provided in the area m near the end 31b from the center 31a in the width direction of the road, and the roadside belt portion n has a larger angle of about 5%. The roadside belt portion n is formed of a concrete street lamp D having a gutter and the like so as to drain from the drainage facility E to the sewer pipe F. On the opposite side from the center 31a, there is a reverse gradient. For this reason, in addition to the concentration of rainwater near the roadside belt n, there is a problem that drainage capacity is over and a dangerous state is forced for bicycles and motorcycles passing through the roadside belt n. On the other hand, in the configuration of FIG. 2, the roadbed 1 a is excellent in water permeability, absorbs moisture from any location of the surface layer portion 11, and permeates water at any location. Even if the side street n is not provided with a street lamp D having a gradient as shown in FIG. 7, it can be drained by the porous pipe 14 or drainage drain without exceeding the drainage capacity. For this reason, rainwater does not concentrate in the vicinity of the roadside belt n, and the danger of a bicycle or a two-wheeled vehicle passing through the roadside belt n can be effectively avoided. In these figures, reference numeral 101 denotes a sidewalk paved with an asphalt mixture, and reference numeral 102 denotes a concrete partition that defines the edge of the sidewalk 101.

And since the above-mentioned pavement 1 uses clinker ash as the porous material, it can be constructed by obtaining the material free of charge or at a low cost, and greatly contributes to ecology through the reuse of industrial waste. It becomes.

In the case of FIG. 2, the surface layer portion 11 having a water permeable function has a certain crossing in the width direction between the center 11 a and the one end portion 11 b and between the center 11 a and the other end portion 11 b. The pavement surface of the road may be configured with a gradient (for example, about 2%). In this way, if the slope is constant and the slope is gentle, the concentration of rainwater on the roadside zone n is reduced, and the obstacles to the passage of bicycles and motorcycles passing through the roadside zone n are effectively eliminated. In addition, drainage on the surface of the surface layer portion 11 can be performed more effectively within a reasonable range.

The road to which such a structure is applied can be applied not only to the road where cars come and go but also to the sidewalk.

(Second Embodiment)
In the pavement 2 shown in FIG. 3, the porous aggregate mixture a is laid to form the middle layer portion 22, and then the water permeable asphalt mixture b, which is a surface layer material having a water permeable function, is laid to form the surface layer portion 21. In the point which formed, it has the water absorption function and water permeability function fundamentally the same as the roadbed 1a of the said embodiment. In this embodiment, a crushed stone roadbed c is disposed below a middle layer portion 22 made of the porous aggregate mixture a to form a second middle layer portion 23, and a porous layer containing no mixture is further formed thereunder. The base material portion 24 is formed by disposing the material d, and the roadbed 2a is constituted by these. The porous aggregate mixture a is used by compacting at least a cement-type solidified material kneaded with clinker, and the surface material b is a water-permeable asphalt mixture. As the crushed stone roadbed c, a mixture of cement concrete and crushed stone in a ratio of 1: 1 is used. The porous material d not containing the mixture is the clinkered grain itself.

The construction thickness in the configuration example of FIG. 3 is designed so that the construction thickness of the middle layer portion 22 made of a porous aggregate mixture is 100 mm to 300 mm thinner than the middle layer portion 12 shown in FIG. 1, and the surface layer portion 21 is 40 mm to 50 mm. The design is made according to the situation such as designing it to be thick within a range, so that the total is almost equivalent to the roadbed 1a of FIG. The base layer portion 24 made of the porous material d containing no mixture is thicker than any of the above layers, and is set to about 300 mm, for example. This base layer portion 24 is excavated and laid in advance to a depth (about 300 mm) that corresponds to the roadbed A. For this reason, it is effective when constructing a new road.

Also in this case, as a preferred embodiment, the clinker ash as the main material has a particle size of 20 mm or less (however, 0.074 mm or less is within 5% of the total), and the mixing ratio of the porous aggregate mixture a (Dry soil weight ratio) is the main material clinker ash: cement-based solidified material = 1: 0.07 to 0.2, and this porous aggregate mixture a is mixed with fresh water 0.18 to 0.25. It has been confirmed by tests that it is extremely effective to add an agent (diluted 150 to 200/1).

If comprised in this way, since the base layer part 24 will adjust the moisture content of a subgrade soil, it will prevent that the subgrade A absorbs a large amount of water rapidly, and rainwater etc. which permeated to the deepest part will enter the subgrade A. It is possible to effectively relieve the “remixing” phenomenon which is a concern when the mud is formed by vibration from the surface layer 21 in the infiltrated state. Since the roadbed 2a is supported by the crushed stone roadbed c, it is possible to effectively form the base layer portion 24 made of the deepest porous material d while maintaining water permeability and strength.

(Other application example 1 of the pavement of the present invention)
The pavement 4 shown in FIG. 4 is an example in which the present invention is applied to configure a roadbed of a parking lot, and is a porous aggregate mixture a in which at least a clinker ash that is a porous material and a cement-based solidified material are mixed. Is formed to form a surface layer portion 41 made of a surface layer material b having a water permeable function, and a crushed stone roadbed c is formed below the middle layer portion 42 made of the porous aggregate mixture a. The base layer portion 43 is formed to constitute a roadbed 4a having water absorption and water permeability, and water is passed through the drainage channel 44 existing between the roadbed 4a and the roadbed A below, The water is guided to the water storage tank G.

In a normal parking lot, rainfall is treated by the surface drainage to the outside (public sewer) through the drainage channel in the site. If the pavement 4 is used in such a parking lot, it has excellent water permeability and water retention. Therefore, a water storage tank G as described above is provided under the parking lot without flowing excessive water into the sewer. If the water is stored in the tank G, the water stored in the water tank G can be reused for toilets in the store and watering for implantation. The scale of the directly installed water storage tank G must be capable of storing at least 80% of the amount directly processed into the current sewer. As a facility, a water spigot is provided at an appropriate location in the parking lot so that the water stored in the water storage tank G can be sprinkled on the pavement 4 when the temperature is high in summer and the transpiration of water is severe. Good. For parking lots such as large leisure facilities and shopping malls, the heat island phenomenon can be mitigated by lowering the surface temperature of the surface layer 41 having a large area, and rainwater can be reused through the water tank G. While saving resources, it is possible to prevent disasters during heavy rains.

(Other application example 2 of the paving body of the present invention)
The pavement 5 shown in FIG. 5 shows an example in which the present invention is applied to a train platform, and a middle layer portion 52 is formed by laying a porous mixture a using clinker ash on an existing concrete floor slab A ′. Then, a water permeable flat block b ′ is laid as a surface layer material to form a surface layer portion 51, thereby forming a roadbed 5a having water absorption and water permeability. Since the existing concrete floor slab A ′ is overhanging with respect to the foundation portion Z below the existing concrete floor slab A ′, the remaining water that has permeated through the roadbed 5a is discharged downward from the overhanging portion.

The temperature rises on the train platform due to the influence of the outside air temperature, the heat storage of the train body, etc. in the summer, regardless of the location where direct heat is blocked, but this pavement 5 has water retention and water permeability. Therefore, it is possible to suppress the surrounding temperature rise.

The train platform has a roof installed outdoors and is not exposed to direct sunlight or direct rain, but the roof is exposed to sunlight in the summer, and the train itself is heated. It is difficult to suppress the temperature rise on the home. Therefore, by constructing a pavement 5 having excellent water retention and water permeability as shown in the figure at the base of the foot, the heat of the surface layer 51 evaporates when the water retained in the pavement 5 is evaporated. The rise in temperature of the entire home can be suppressed by utilizing the characteristic that heat takes away the ambient temperature.

In this case, as a preferred embodiment, the clinker ash as the main material has a particle size of 20 mm or less (however, 0.074 mm or less is within 5% of the total), and the mixing ratio of the porous aggregate mixture a ( The dry soil weight ratio) was the main material, clinker ash: cement-based solidified material = 1: 0.10 to 0.20, and the porous aggregate mixture a was mixed with fresh water 0.18 to 0.25 and an admixture. (150-200 / 1 dilution) is added and used.

(Other application examples of porous aggregate mixture used in the present invention)
When constructing a large concrete structure X such as the drainage facilities C and E and the water storage tank G, as shown in FIG. 6, a mold 200 is formed using a porous aggregate mixture a. It is effective to do.

That is, when creating a concrete structure such as a concrete structure X, it usually takes time and effort to make a slump value of ready-mixed concrete. Further, if the slump value is large, the sufficient strength of the concrete structure X cannot be maintained. Furthermore, since the formwork is usually wood, the wood chips are mixed into the concrete structure X, which affects the strength. Therefore, in the same manner as described above, the cement-based solidified material is kneaded with the clinker ash, which is a porous material, to produce a porous aggregate mixture a, which is kneaded with an admixture, fresh water, etc., and has a thickness of 30 to 50 mm. Mold into a plate. This is used for the formwork 200 of the concrete structure X, and after placing concrete inside, only the support 300 is removed and the whole formwork 200 is refilled.

As a preferred embodiment in this case, the particle size of the clinker ash is 0.074 mm to 25 mm, and the mixing ratio (dry soil weight ratio) of the porous aggregate mixture a is the main material clinker ash: cement-based solidified material = 1 0.15 to 0.25, and 0.18 to 0.25 of fresh water and an admixture (150 to 200/1 dilution) were added to this porous aggregate mixture a, and a load (1000 kg or more) was applied. Tests have confirmed that molding is extremely effective.

The mold 200 has excellent water permeability as well as water absorption, and discharges excess water generated during the preparation of ready-mixed concrete to the outside. The hardness of the concrete structure X can be assured by gradually supplying it to the inside according to the reaction heat at the time of hardening of the concrete. In addition, bleeding water, which is strong alkaline water, is difficult to treat, such as neutralization with sulfuric acid, when the ready-mixed concrete is placed. Is done.

When a wooden panel is used as a formwork, there is a possibility that dust may be generated or dust generated inside the structure at the time of placing concrete may affect the strength of the structure. This can be suppressed by using a frame.

Also, while having strength, it is easy to process, so work efficiency is improved.

The normal concrete slump, which is about 8 normal, can be set to a viscosity of 12 or more, and the fluidity improves, so the working efficiency of placing is greatly improved and the panel is filled with bleeding water. The occurrence of junka (bean plate), which is seen when placing high-viscosity ready-mixed concrete, is also eliminated.

As mentioned above, although some embodiment of this invention was described, the specific structure of each part is not limited only to embodiment mentioned above, for example, a porous material is water permeability and water retention besides clinker ash. Various modifications can be made without departing from the gist of the present invention, for example, if it has properties and strength, it can be substituted.

According to the present invention described in detail above, the pavement is formed of a material having both water retention and water permeability, and water can be appropriately infiltrated into the road floor as well as water retention. Even when water is sucked up and water is not supplied to the roadbed for a long time due to sunshine or the like, it is possible to suck up water from the roadbed and suppress the temperature rise of the surface layer. In addition, it can absorb moisture from any location on the surface asphalt, and can retain water at any location, so that it can be drained and has a structure that does not cause a puddle, etc. Can prevent a large amount of water from flowing into the drainage channel at a stretch, and can provide a pavement that can prevent a large amount of water from flowing into the water distribution pipe.

Claims

A pavement comprising at least two layers in which a porous aggregate mixture obtained by mixing a porous material and a cement-based solidified material is laid and a surface layer material having a water permeable function is laid.
2. The pavement according to claim 1, wherein a semi-water-impervious film having both a water permeability function and a barrier function is formed at a boundary between the porous aggregate mixture and the road bed below the porous aggregate mixture.
The pavement according to claim 2, wherein the semi-water-impervious film is inclined in the direction of the drain pipe.
The pavement according to claim 1, wherein a surface pavement surface is constructed by flatly laying a surface layer material from one end portion to the other end portion in the width direction without applying a transverse gradient from the center in the width direction to both ends. .
2. The pavement surface of the road is configured by providing a constant transverse gradient between the center layer and one end portion and between the center and the other end portion of the surface layer material having a water permeable function in the width direction. The listed pavement.
A crushed stone roadbed is laid under the porous aggregate mixture obtained by mixing a cement-based solidified material or the like with a porous material, and a porous material not containing the mixture such as the solidified material is further disposed thereunder. Item 1. A pavement according to item 1.
The pavement according to claim 1, wherein the porous material is clinker ash.
It is the construction method of the pavement according to claim 1, wherein the pavement is exposed by removing the current pavement, and a surface layer portion comprising a middle layer portion made of a porous aggregate mixture and a surface layer material having a water permeability function. A pavement construction method characterized by sequential construction.
The pavement construction method according to claim 6, wherein the base layer portion is made of a porous material not containing a mixture such as a solidified material, the second middle layer portion is made of a crushed stone roadbed, the middle layer portion is made of a porous aggregate mixture, A pavement construction method characterized by constructing a surface layer portion made of a surface material having a water permeable function sequentially from the bottom to the top.
It is made by molding a porous aggregate mixture in which a porous material and cement-based solidified material are mixed into a plate shape, and concrete is cast inside and backfilled as a part of the concrete structure. Characteristic backfillable formwork for concrete.
A middle layer is formed by laying a porous mixture of a porous material and cement-based solidified material on a concrete floor slab overhanging the foundation, and then a surface layer is laid on the surface layer. To form a roadbed having water absorbency and water permeability in the platform of the train.