JP2014020175A - Vegetation block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vegetation block for which a waste concrete material is recycled and utilized, in which features of a molded concrete material using the waste concrete material as an aggregate are effectively utilized, and which is laid over a ground surface of a park or the like together with vegetation so as to be effective for reducing the heat island phenomenon.SOLUTION: Reinforcing parts 5, 6 are provided between at least confronted outer frame parts 2, in a shape having an accommodation space 4 for a vegetation filling material 3 inside of the outer frame parts 2. Only waste concrete particles obtained by crushing a waste concrete material are used as an aggregate for molding. Cement in a high ratio and moisture in a low ratio are added thereto, such that a mixture which is nearly dried apparently is prepared. Dry-molding of the mixture is performed, thereby obtaining high water permeability, high water retentivity, and a sufficiently great flexural strength (or compressive strength).

Description

  The present invention relates to a vegetation block that recycles a large amount of waste concrete material generated from an aged building or the like that has been conventionally discarded.

  In recent years, there are many concrete buildings in urban areas, and roads, plazas, parking lots, etc. are covered with concrete or asphalt. For this reason, during the day, they absorb solar heat and raise the daytime temperature, and heat dissipation from the concrete and asphalt continues at night, raising the nighttime temperature. These are the causes of the heat island phenomenon, where the temperature in urban areas is higher than in the surrounding area.

  As a pavement material useful for reducing such a heat island phenomenon, a concrete vegetation block laid on the ground surface together with vegetation such as lawn has been conventionally used (see Patent Document 1). On the ground surface where such vegetation blocks are laid, rainwater penetrates the ground through vegetation and the soil attached to it, and the ground moisture is guided to the ground to prevent the surface from drying. The temperature can be lowered.

  However, with this type of conventional vegetation block, the concrete portion hardly retains water and the permeability is low, so rainwater penetrates into the ground and absorbs moisture, and the water retention is exclusively filled with vegetation and the accompanying soil. Therefore, if the amount of vegetation and its filler is not enough or the water retention is low, the vegetation filler will flow out or the vegetation will not settle and grow. There was a problem that it would not function as an original vegetation block for a long time unless applied.

  On the other hand, for concrete, which is a material for forming paving materials such as the above vegetation blocks, there is a social demand to promote the treatment of building waste generated from the construction site, and in recent years, a large amount generated by the Great East Japan Earthquake. Because of the demand for early treatment of debris, there is a need for concrete materials that recycle waste building materials and waste concrete materials contained in debris.

  In response to the above demand, the inventor of the present invention has already invented a molded concrete pavement material that uses the entire amount of waste concrete material as an aggregate (see Patent Document 2).

  The molded concrete pavement according to the above invention has sufficient strength (bending strength or compression) as a pavement by devising the proportion of cement, the proportion of moisture, the method of molding, etc. with respect to the waste concrete particles as aggregate. Strength) as well as high water retention and high water permeability.

  However, regarding the above-described molded concrete pavement, there is no proposal yet to specifically exploit the characteristics such as excellent water retention and water permeability.

JP-A-9-31991 Japanese Patent No. 4263385

  In view of the circumstances described above, the present invention sufficiently recycles a large amount of waste concrete material generated from construction waste materials that have been disposed of in the past, and sufficiently provides the characteristics of the molded concrete pavement material that uses the waste concrete material as an aggregate. It is an object to provide a vegetation block useful for environmental conservation such as reducing heat island phenomenon.

  The present invention has been made to achieve the above-mentioned problems, and uses only waste concrete particles obtained by pulverizing waste concrete as aggregate, and a high proportion of cement (17 weight of aggregate). % (Dry weight) or more and 20 weight% (dry weight) or less], and a low proportion of moisture (15% or more and 25% or less based on the weight of the solid content of the aggregate and cement). A vegetation block excellent in water permeability, water retention and bending strength (or compressive strength) obtained by preparing a mixture in a state and dry-molding the mixture, and having a vegetation filler on the inner side of the outer frame portion A shape having an accommodating space is characterized in that a reinforcing portion is provided at least between the opposed outer frame portions.

  According to said structure, the concrete vegetation block itself has sufficient intensity | strength, and has high water retention and water permeability.

  Therefore, it has a vegetation filler accommodating space inside the outer frame portion, but is not easily damaged and can withstand a heavy weight load (for example, riding a vehicle in a parking lot). Moreover, since the reinforcing part is provided between the opposing outer frame parts, even if the outer frame part is relatively thin and the accommodation space for the vegetation filler is wide, the initial shape is maintained without causing cracks or damage. Yes.

  Moreover, since the vegetation block itself retains water, it is possible to prevent dry mortality of vegetation such as lawn together with fillers such as soil accommodated therein, and to firmly establish vegetation.

  Furthermore, the permeability of the vegetation block promotes the penetration of rainwater to the ground side, and not only the water circulation cycle is realized in a state close to the natural environment where the ground is exposed, but also when the ground side is dry, Due to the water permeability of the vegetation block, the moisture of the ground is sucked up to the ground surface side. From this point, the temperature rise on the ground surface side can be suppressed, and the vegetation can be prevented from drying out and withering.

  In addition, the vegetation block uses only waste concrete particles obtained by pulverizing waste concrete as aggregate, so that a large amount of waste concrete can be recycled, and it is possible to treat building waste and earthquake debris. Needless to say, it helps.

  In the vegetation block having the above-described configuration, the accommodation space for the vegetation filler inside the outer frame portion can be opened both on the front surface side and the back surface side.

  In this way, when the accommodation space for the vegetation filler is not only open to the front side but also leads to the back side, the vegetation filler such as the roots of the vegetation and the soil accompanying it is in close contact with the ground. Therefore, not only the penetration of rainwater into the ground is promoted, but also the absorption of moisture from the ground side is promoted, and the establishment of vegetation is further ensured.

  In the vegetation block having the above-described configuration, the back surface side of the accommodation space for the vegetation filler inside the outer frame portion may be shielded by a bottom portion that also serves as a reinforcing portion.

  According to this configuration, the rainwater that falls on the vegetation in the accommodation space and its filler will be retained in the accommodation space in a state in which moisture is appropriately passed to the ground side through the bottom, and the vegetation block itself In combination with the moisture retained in the vegetation, sufficient moisture can be continuously given to the vegetation.

  Next, in forming the vegetation block having the above-described configuration, more specifically, the waste concrete particles as the aggregate have a particle size of not more than 0.3 mm and a particle size of 5 mm or less. The content of the above particles is 3% by weight or less, and a predetermined high ratio of cement and a predetermined low ratio of water are added to this aggregate to prepare an apparently almost dry mixture, and high vibration and high compression are achieved. It is desirable to dry-mold together and obtain a molded product by an immediate demolding process, and then cure it for 24 hours or more in an atmosphere saturated with steam.

  Further, in the above molding, the waste concrete particles as aggregates have a particle size of not more than 10 mm by weight and a particle size of not less than 2.5 mm and a particle size of not less than 2.5 mm. % Or less.

  According to the present invention, since only the waste concrete particles are used as the aggregate, the waste concrete material that has been conventionally discarded can be recycled as a resource.

  Further, in the present invention, a vegetation block having strength and excellent water retention and water permeability can be obtained, and the vegetation block can be reliably vegetated by laying the vegetation block on a ground surface such as a park or a parking lot together with vegetation such as lawn. Can be fixed to suppress the drying of the ground surface and the temperature rise, thereby effectively reducing the heat island phenomenon.

The perspective view of the vegetation block which concerns on the 1st Embodiment of this invention. The perspective view which shows the laying state of the said vegetation block. The vegetation block which concerns on the 2nd Embodiment of this invention is shown, (A) is a perspective view, (B) is a vertical side view. The perspective view of the vegetation block which concerns on the 3rd Embodiment of this invention. The perspective view of the vegetation block which concerns on the 4th Embodiment of this invention. The perspective view of the vegetation block which concerns on the 5th Embodiment of this invention. The perspective view of the vegetation block which concerns on the 6th Embodiment of this invention.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a vegetation block 1 according to the first embodiment.

  The vegetation block 1 of this embodiment is a concrete molded body in which only the waste concrete particles obtained by pulverizing the waste concrete material as an aggregate are aggregates, and the raw material and the molding process are the same as those of this embodiment. This will be explained later in the section.

  The vegetation block 1 has a square outer frame portion 2 in plan view, and has four accommodation spaces 4 for filling a vegetation filler 3 in which vegetation seeds such as lawn, fertilizer, soil, and the like are mixed. Is formed. In the present embodiment, each of the accommodation spaces 4 is open to the front surface side (upper side in FIG. 1) and the rear surface side (lower side in FIG. 1) of the vegetation block 1.

  In addition, inside the outer frame portion 2, two reinforcing portions 5 and 6 are provided integrally with the outer frame portion 2, and the entire vegetation block 1 has a block shape of a “field shape” in plan view. It has become.

  Each of the reinforcing portions 5 and 6 has the same height as the outer frame portion 2 in the form of partitioning the accommodation space 4 between the outer frame portions 2 facing the vertical direction (or the horizontal direction) of the vegetation block 1. It is provided. Therefore, the vegetation filler 3 is filled in the four accommodation spaces 4 partitioned by the reinforcing portions 5 and 6, respectively.

  In this embodiment, the outer frame portion 2 has a square outer shape. However, as a modification, the outer frame portion 2 may have another polygonal shape such as a rectangle, a trapezoid, or a parallelogram. You may shape | mold the outer surface of the outer frame part 2 to a waveform so that it may contact | connect with the other vegetation block 1 without deviation.

  In order to form the vegetation block 1 described above, sand and crushed stone that are usually used are not included as aggregates, and only waste concrete material is used. As the waste concrete material, a material obtained by removing impurities such as wood, iron scrap, plastic and asbestos in advance is used. In addition, the waste concrete material is pulverized and granulated, and the particles have a particle size distribution as follows by sieving.

  That is, the waste concrete particles obtained by pulverizing the waste concrete material have a particle size of not more than 0.3 mm and a particle size of not more than 5% by weight and a particle size of not less than 5 mm and a content of 3%. % Or less is desirable.

  Alternatively, the content of particles having a particle diameter of 0.6 mm or less may be 10 wt% or less, and the content of particles having a particle diameter of 2.5 mm or more may be 20 wt% or less.

  To the above aggregate, a higher proportion of cement and a lower proportion of moisture than normal concrete are added to give an apparently almost dry mixture.

  Here, the high ratio cement is specifically a cement of 17% by weight (dry weight) or more and 20% by weight (dry weight) or less of the aggregate. The low proportion of water is 15% or more and 25% or less of the solid weight of aggregate and cement.

  The above mixture is put into a mold, dry-molded using a combination of high vibration and high compression, and after molding is obtained by an immediate demolding process, it is cured for 24 hours or more in an atmosphere saturated with steam. The vegetation block 1 is obtained as a concrete molded body.

The vegetation block 1 obtained as described above is porous, rich in water retention and water permeability, and high in strength. The permeability coefficient is 1.05 × 10 ⁻² cm / sec or more, and the bending strength is 3.0 N / mm ² or more.

  The vegetation block 1 formed as described above is laid on a required ground surface such as a road, a park, and a parking lot together with vegetation such as lawn. That is, a large number of vegetation blocks 1, 1... Are arranged adjacent to each other, and the accommodation space 4 of each vegetation block 1 is filled with the vegetation filler 3.

  FIG. 2 shows a state in which the vegetation block 1 is laid in a parking area of a parking lot. In the parking area ar, laying of the vegetation block 1 is omitted in the area ab facing the engine in the front of the vehicle, and a car stopper s is installed in the front of the parking area ar.

  In the vegetation block 1 laid, the outer frame portion 2 which is a concrete portion has sufficient strength, and the reinforcing portions 5 and 6 are provided between the opposed outer frame portions 2 so that they are semi-permanent without causing cracks or breakage. The initial shape is maintained.

  The vegetation block 1 and the vegetation filled therein permeate rainwater into the ground side, but when dry, the vegetation block 1 itself retains moisture, and the water permeability of the vegetation block 1 causes moisture on the ground side to flow. It will be sucked up and supplied to the vegetation filling material 3, preventing the vegetation from drying and dying, allowing the vegetation to be firmly fixed, and eliminating the trouble of growing the vegetation.

  3A and 3B show a vegetation block 12 according to the second embodiment of the present invention.

  In the vegetation block 12 of this embodiment, as shown in a vertical section in FIG. 3B, the outer frame portion 2 is made thicker toward the back surface side, and the reinforcing portion 7 is provided at a lower position on the back surface side. Yes. Thus, when the back side of the outer frame part 2 is thick, the volume of the concrete part increases, the water retention amount of the entire vegetation block 12 increases, the water retention effect increases, and the outer frame part 2 is thick. As a result, the strength increases and it is difficult to break.

  Moreover, since the back surface side of the outer frame portion 2 is thick, the opening on the back surface side of the housing space 4 is narrowed, and the housing space 4 is an open space, the vegetation filling material 3 (not shown in FIG. 3) Outflow can be suppressed.

  On the other hand, since the front surface side of the outer frame portion 2 is relatively thin and the reinforcing portion 7 is on the back surface side, the accommodation space for the vegetation filler 3 is wide open to the front surface side, and a large amount of vegetation filling is performed. The material 3 can be filled.

  FIG. 4 shows a vegetation block 13 according to a third embodiment of the present invention. In the vegetation block 13 of this embodiment, the back surface side of the accommodation space 4 for the vegetation filler is a bottom portion 8 also serving as a reinforcing portion. It is shielded with. In this configuration, there is no outflow of the vegetation filler 3 and there is no waste. In addition, since the bottom portion 8 also has water permeability, rainwater that falls on the vegetation filler 3 in the accommodation space 4 is retained in the accommodation space 4 in a state where the rainwater is appropriately permeated to the ground side through the bottom portion 8. Thus, in combination with the moisture held in the vegetation block 13 itself, sufficient moisture can be continuously given to the vegetation.

  FIG. 5 shows a vegetation block 14 according to a fourth embodiment of the present invention. In the vegetation block 14 of this embodiment, a bottom 8 serving also as a reinforcing part is provided on the back side of the accommodation space 4 for vegetation filler. And a drain hole 9 is formed in the bottom 8.

  In this embodiment, the accommodation space 4 for the vegetation filler is surrounded by the outer frame portion 2 and the perforated bottom portion 8, and the vegetation can be grown like a potted plant.

  FIG. 6 shows a vegetation block 15 according to the fifth embodiment of the present invention. The vegetation block 15 of this embodiment has a rectangular outer frame portion 2 in plan view, and a reinforcing portion 16 is provided integrally with the outer frame portion 2 inside the outer frame portion 2 so that the entire vegetation block 1 is provided. The plan view is a “Japanese character” block shape.

  FIG. 7 shows a vegetation block 17 according to the sixth embodiment of the present invention. The vegetation block 17 of this embodiment has a rectangular outer frame portion 2 in plan view, and two parallel reinforcing portions 18 and 19 are provided integrally with the outer frame portion 2 inside the outer frame portion 2. Thus, the entire vegetation block 1 has a “eye-shaped” block shape in plan view.

  In each of the vegetation blocks 12, 13, 14, 15, and 17 of the second, third, fourth, fifth, and sixth embodiments, the raw material and the molding process are the same as those of the vegetation block 1 of the first embodiment. There is no. Accordingly, in the second, third, fourth, fifth, and sixth embodiments, a large amount of waste concrete material can be recycled as in the vegetation block 1 of the first embodiment.

1, 12, 13, 14, 15, 17 ... Vegetation block 2 ... Outer frame part 3 ... Vegetation filler 4 ... Storage space 5, 6, 7, 16, 18, 19 ... Reinforcement part 8 ... Bottom 9 …… Drain hole

Claims (6)

Use only waste concrete particles obtained by pulverizing waste concrete as aggregate, and use a high proportion of cement (17% by weight (dry weight) or more, 20% by weight (dry weight) or less of aggregate), and Water permeability obtained by adding a low ratio of moisture (15% or more and 25% or less based on the weight of aggregate and cement solids) to prepare an apparently almost dry mixture and dry-molding this mixture A vegetation block with excellent properties, water retention, and bending strength (or compressive strength),
A vegetation block having a vegetation filler accommodating space inside an outer frame portion, wherein a reinforcing portion is provided at least between opposing outer frame portions.   The vegetation block according to claim 1, wherein the accommodation space for the vegetation filler is open on the front side and the back side inside the outer frame part.   2. The vegetation block according to claim 1, wherein a back surface side of the accommodation space for the vegetation filler is shielded by a bottom portion that also serves as a reinforcement portion inside the outer frame portion. Waste concrete particles as aggregates have a particle size of not more than 0.3 mm and a particle size of not more than 5% by weight and a particle size of not less than 5 mm and not more than 3% by weight. The content of particles having a diameter of 0.6 mm or less is 10% by weight or less, and the content of particles having a particle size of 2.5 mm or more is 20% by weight or less,
Add a certain high proportion of cement and a certain low proportion of water to this aggregate to prepare an apparently almost dry mixture, dry mold using both high vibration and high compression, and form by an immediate demolding process The vegetation block according to claim 1, which is obtained by curing for 24 hours or more in an atmosphere saturated with steam.   2. The vegetation block according to claim 1, wherein the outer frame portion and the reinforcing portion have a block shape of “field shape”, “day shape”, or “eye shape” in plan view.   A parking lot in which the vegetation block according to claim 1 is laid in a parking area.

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