JPH0598654A - Concrete block for greening - Google Patents

Abstract

PURPOSE:To green the surface of a retaining wall constructed by precast concrete blocks with natural plants. CONSTITUTION:A porous concrete layer 2 is integrally provided on the surface of a concrete block main body 1A. Greening aggregates mixed with a hygroscopic swelling material swollen by water absorption and a water-soluble binder and molded and solidified into grains are mixed with granulated aggregates for concrete to form the porous concrete layer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete greening block on which moss, grass and vines can be directly planted on the surface of the concrete block.

[0002]

2. Description of the Related Art Generally, in residential land development, road and railway construction, a retaining wall using a concrete block is constructed to prevent the slope from collapsing. As a retaining wall of this type,
A frame method in which blocks are combined in a cross girder pattern and attached to an inclined surface, a method in which plate-shaped precast concrete blocks are attached, and concrete blocks are piled up like stone walls, and the blocks are connected with concrete. There is a method of building blocks, such as a maize block, which is designed to withstand horizontal earth pressure by the weight of the block.

Precast concrete products are also used for curbstones and paving stones for roads.

On the other hand, in recent years, during the construction of residential land and the construction of roads, greening has been promoted in order to prevent these precast concrete blocks from damaging the surrounding landscape. It was common to install a part that can hold vegetation soil on a part of the retaining wall and paving stone surface with blocks, and to let vegetation grow on it. For example, there are those that hold earth and sand in the space between the grid-like method frames, and one that has a pot for holding earth and sand in a terrace shape on a part of the retaining wall.

[0005]

In the conventional greening method for retaining walls, paved roads, etc. by the concrete block as described above, the concrete color is still exposed on the surface of the block itself, and sufficient greening is achieved. In particular, in the construction method that covers most of the surface with blocks, when using this on the side slope of the highway,
From the point of view of ergonomics, it is necessary to diffuse light along with greening, and it is necessary to provide complicated unevenness on the surface of the concrete block, which raises the problem of high construction cost.

In view of the above problems, the present invention provides a natural greening on the entire surface only by constructing a retaining wall by a precast concrete block and forming a pavement surface as in the conventional construction of a retaining wall not considering greening. It is intended to provide a green concrete block that can be expressed.

[0007]

[Means for Achieving the Object] The gist of the present invention for solving the above-mentioned conventional problems and achieving the intended object is to use a fertilizer for vegetation and soil material and water absorption. A water-absorbing expansive material that expands, and a water-soluble binder are mixed and mixed into a granular greening aggregate that has been solidified into granules and mixed with concrete granular aggregate, and each aggregate is sprinkled with an inter-aggregate consolidation binder, It is a greening concrete block in which a porous concrete layer which is solidified by leaving leaving continuous voids is integrally provided on the surface of a precast concrete block body.

As the precast concrete block body, there are a precast concrete block body that constitutes a legal frame such as a cross girder, a plate-shaped one that covers the surface of a slope or a road surface, and a product block type.

The green aggregate can contain seeds for vegetation and fertilizer. In this case, the plant grows only by absorbing water after the foundation is formed.

As the water-swelling material, an irreversible water-swelling clay that expands by absorbing water and does not shrink even after drying, and / or a water-swelling organic substance such as sodium alginate and / or a water-absorbing polymer can be used.

Organic substances and / or water-absorbent polymers can be used as soil material for vegetation.

As the soil material for vegetation, a mixture of organic, inorganic and / or inorganic granular material, powdery material and fibrous material can be used.

As the granular aggregate for concrete, a granular coarse aggregate such as crushed stone or a mixture of the granular aggregate and granular fine aggregate can be used.

Further, the mixing ratio of the green aggregate and the granular aggregate for concrete is preferably 3: 5 to 5: 5 (volume ratio).

[0015]

The porous concrete layer in the greening concrete block of the present invention has a porous concrete shape in which both the greening aggregate and the granular aggregate for concrete are aggregates at the time of molding, and continuous voids are formed between the aggregates. Molded. On the other hand, after the block is laid, the water-soluble binder of the greening aggregate gradually dissolves due to water absorption by rainfall or the like, and the water-absorption expansive material absorbs water and tries to expand.
On the other hand, the greening aggregate has its peripheral surface coated with an inter-aggregate binding binder, but the surrounding coating is destroyed by the expansive force of the water-absorbing expansive material due to water absorption, and the contents spread into the space between the aggregates, Porous concrete composed of granular aggregate for concrete and aggregated binder for aggregate has been crushed to become green aggregate composition and liquid phase conditions, and the three-phase distribution as a whole is suitable for plant growth Becomes

Further, even if the water content in the water-absorptive expansive material decreases in the dry period, and even if the water-swelling expansive material itself shrinks, other greening aggregate constituent materials remain in a state of spreading in the voids, and the three-phase distribution is greatly changed. Don't come

[0017]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows a method frame block in which the present invention is embodied. A porous concrete layer 2 is integrally formed on the surface of a block body 1A made of ordinary concrete. As shown in Fig. 2, this is the slope surface 3
Is laid in a grid pattern, and vegetation soil 5 is housed in the grid interior 4 as in the conventional case.

When the interior 4 of the lattice is closed with a concrete slab block as shown in FIG. 3, a porous concrete layer 2 is integrally formed on the surface of the concrete slab block body 1B as shown in FIG. ..

FIG. 4 shows a case where the present invention is applied to a gravity type product block, in which a porous concrete layer 2 is integrally formed on the surface of a block body 1C which is made of ordinary concrete. As shown in FIG. 5, these are piled up on the front surface of the slope in order and backfilled, and the cast-in-place concrete 6 is poured between the block main bodies 1C to form the gravity type retaining wall 7.

FIG. 6 shows a case in which the present invention is applied to a curb on a road. In addition to the exposed surface of the block body 1D,
The porous concrete layer 2 is also integrally formed on the back side which is buried in the soil. In this case, the porous concrete layer 2 on the back side, which is buried in the soil, becomes the root of the plant vegetated in the soil on the back side.

In addition, although not shown in the figure, it can be used for various concrete blocks such as a flat concrete slab for paving stones.

As shown in FIG. 7, the porous concrete layer 2 of each of the blocks mentioned above comprises granular granules 11 made of crushed stone, granular greenery aggregates 12 and a binder 13 made of cement paste obtained by adding water to Portland cement. It is in the form of porous concrete that is mixed at a constant ratio and has continuous voids 14 formed inside. The mixing ratio of the granular aggregate 11 for concrete and the green aggregate 12 is 7: 3 to 5: 5. As for the particle diameters of both aggregates 11 and 12, those having a diameter of 1 m / m to 9 m / m in a normal distribution state are used.

The composition of the green aggregate used in the present invention is as follows.

Green Aggregate Composition Example 1 (organic bulk) Water-absorbent expander Water-absorbent expandable clay 15 (part by volume) Water-absorbent polymer 2 Soil material and fertilizer Organic peat moss 45 Bark compost 10 Bagasse powder 5 Urea fertilizer 5 Inorganic sera bora powder 10 1 / 2C & C 15 Biocarbon 10 Binder Poval 5 Seed K31F 2 Greening Aggregate Composition Example 2 (mineral abundant product) Water absorbent expander Water absorbent expandable clay 15 (volume part) Water absorbent polymer 2 Soil material and fertilizer Organic peat moss 40 Bagasse powder 5 Urea fertilizer 5 Inorganic vermiculite (granules) 10 Zeolite (granules) 10 Cerabola (granules) 5 1 / 2C & C (granules) 5 Biocarbon 10 Binder Bovall 5 Seeds K31F 2 Greening aggregate composition example 3 (organic binder product) Water absorbent expansion material Water absorbing expansive clay 15 (volume part) Water absorbing polymer 2 Soil Material and Fertilizer Organic Peat Moss 15 Bark Compost 10 Bagasse Powder 10 Urea Fertilizer 5 Inorganic Verculite (Grain) 5 Zeolite (Grain) 5 Cerabola (Grain) 5 Biocarbon 10 Binder Sodium Alginate 30 Seed K31F 2 Coating Material Poval 5 In the greening aggregate composition example 3, the alginic acid-based soda as a binder is a water-soluble organic substance, and serves as a soil material and a fertilizer, and also exerts the effect of a water-absorptive material. Further, in the same composition example 3, the coating material is
Other components were blended, formed into a granular shape, and then coated on the surface. This is because sodium alginate used as a binder and a water-swollen organic substance inhibits the solidification of cement.

The porous concrete layer 2 located on the surface of the retaining wall formed by using the blocks thus constructed has a granular aggregate 11 for concrete and a green aggregate 12 at the beginning of construction as shown in FIG. And are mixed in a fixed ratio, and both aggregates 11 and 12 have a porous concrete shape, but with the passage of time, the green aggregate 11 absorbs water, the water-absorbing expansive material inside expands, and due to the expansive force The outer shell of the binder 13 is destroyed, and the contents spread to the inside of the void 14 as shown in FIG.

[0027]

Industrial Applicability As described above, the concrete block for greening of the present invention is used for concrete such as crushed stone and greening aggregate obtained by mixing the water-absorbing expansive material that expands by absorbing water into the soil material and solidifying it into granules. By integrally forming a porous concrete layer consisting of granular aggregate, water absorption after installation as a retaining wall causes the greened aggregate to expand and break, and the soil material to the details of the voids between the granular aggregate for concrete. Filled, leaving a proper gas phase, rich in water retention,
In addition, the liquid phase in which a continuous capillarity phenomenon is obtained is formed in a continuous state, and the greened aggregate does not return to its original state even after being destroyed once it is dried. Since the condition of being spread in the void is maintained, the liquid phase conditions do not change due to dry and wet conditions, and the soil conditions that are good for vegetation are maintained permanently.

Further, according to the present invention, only by installing the precast block by the same construction method as in the conventional case, moss, ivy and grass are proliferated on the retaining wall of the block, and natural greening is achieved. Done.

On the other hand, even before the growth of these plants, the green aggregate is broken due to water absorption, so that the surface changes from concrete color to blackish brown, and changes to a color similar to that of natural soil. For this reason, the reflection of sunlight is reduced, and it becomes an effective retaining wall for the side slope of the expressway.

[Brief description of drawings]

FIG. 1 is a perspective view of an example in which the present invention is applied to a method frame block.

FIG. 2 is a cross-sectional view showing a retaining wall construction example according to the above-mentioned method frame.

FIG. 3 is a cross-sectional view showing another example of retaining wall construction according to the above law frame.

FIG. 4 is a perspective view of an example in which the present invention is applied to a product block.

FIG. 5 is a cross-sectional view showing a retaining wall construction example using the above product block.

FIG. 6 is a sectional view when the present invention is applied to a curb.

FIG. 7 is a partially enlarged sectional view of a porsula concrete layer.

FIG. 8 is a partially enlarged cross-sectional view of the porous concrete layer after the greening aggregate has expanded.

[Explanation of symbols]

 1A, 1B, 1C, 1D Block body 2 Porous concrete layer 3 Ground surface 4 Lattice interior 5 Vegetation soil 6 Cast-in-place concrete 7 Weight retaining wall 11 Granules for concrete 12 Binder 14 Binder 14 Continuous void

Continuation of front page (71) Applicant 591241040 Fuji Concrete Industry Co., Ltd. 3-26-7, Musashino-shi, Tokyo (71) Applicant 000162216 Kyowa Concrete Industry Co., Ltd. 1-8 Minamijojo Nishi, Chuo-ku, Sapporo-shi, Hokkaido ( 72) Inventor Yoshio Senju 1-11-7 Higashigotanda, Shinagawa-ku, Tokyo Inside Jyagrass Tokyo Branch (72) Inventor Yuji Nakano 4-2-35 Kudankita, Chiyoda-ku, Tokyo Inside Light Corporation (72) Inventor Toru Ikyama 1-6-1 Otemachi, Chiyoda-ku, Tokyo Within Nippon Cement Co., Ltd. (72) Inventor Tomiharu Yamamoto 2057 Kakuma, Ibusuki-cho, Minamisaitama-gun, Saitama Nikko Special Construction Co., Ltd. (72) Inventor Makino Koji 3-26-7, Musashino, Tokyo Metropolitan area Fuji Concrete Industry Co., Ltd. (72) Inventor, Koji Takazawa 4-6-19 Kohinata, Bunkyo-ku, Tokyo Kyowa Concrete Industry Co., Ltd.

Claims (7)

[Claims] 1. A fertilizer and a soil material for vegetation, a water-absorbing expansive material that expands by absorbing water, and a water-soluble binder are mixed and molded into a granular greening aggregate, which is mixed with a granular aggregate for concrete. A greening concrete block comprising a porous concrete layer obtained by sprinkling each of the aggregates with a binder for solidifying the aggregates and solidifying them by leaving a continuous void inside to integrally solidify them on the surface of the precast concrete block body. 2. A vegetation fertilizer and a soil material, a water-absorption expansive material that swells by absorbing water, vegetation seeds, and a water-soluble binder. For greening, a porous concrete layer that is mixed with aggregate, sprinkled with a binder for consolidation between aggregates, and solidified by leaving a continuous void inside to be solidified integrally on the surface of the precast concrete block body Concrete block. 3. The greening concrete block according to claim 1, wherein the water absorbing expansive material is a water absorbing expansive clay that expands by absorbing water. 4. The greening concrete block according to claim 1, wherein the water absorbing expansive material is an organic substance that expands by absorbing water. 5. The greening concrete block according to claim 1, wherein the water-swelling expansive material is a granular water-absorbing polymer. 6. The greenery concrete block according to claim 1, wherein the soil material for vegetation is a mixture of organic and / or inorganic granular material and fibrous material. 7. The greening according to claim 1, wherein the granular aggregate for concrete is granular coarse bone such as crushed stone or a mixture of the granular coarse aggregate with granular fine aggregate. Concrete block.