JPH09316851A - Porous concrete mould for cultivating plant, and method of executing work for multi-nature type revetment by using the concrete mould - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a porous concrete mould which are suitable to growth of mugworts and other plants such as are seen at a revetment part of a river, and provide a method of executing work for a multi-nature type revetment. SOLUTION: Porous concrete moulds (a), (b), (c) of a porosity of 15-25% having at least one surface of irregular form, for cultivating plants using the surface of irregular form, in which filler soil material is changed, are placed and arranged in a coastal zone of a river, a lake, or the sea, or otherwise, filler soil material is charged filled after the moulds (a), (b), (c) are placed and arranged on the coastal zone, so by growing plants of the chrysanthemum family, rice family, willow family, or syringa family to form mangroves, a revetment can be protected without damaging natural environments or a view.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous concrete molding for covering soil and cultivating plants, and a method for constructing a multi-natural revetment using the same.

[0002]

2. Description of the Related Art Afforestation of rivers, especially low-water revetments that are frequently exposed to running water, requires maintaining stable functioning as a revetment while stabilizing the planting base. A natural revetment method has been proposed. Porous concrete having voids inside has water permeability and is used as a material for sidewalks and plants. However, when using porous concrete for a natural revetment, it is necessary to use one with a porosity of 15 to 25% in order to secure the revetment strength, and plant growth is not sufficient with conventional flat plate type concrete. There were cases.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a porous concrete compact which is more suitable for plant growth than conventional ones, and a method for constructing a multi-natural revetment using the porous concrete compact. The purpose is to provide.

[0004]

In order to solve the above problems, the porous concrete molded product for plant cultivation according to claim 1 has at least one surface having an uneven shape and a porosity of 15 to 25%. The present invention is characterized in that a plant is grown using the surface having the uneven shape. The construction method of the multi-natural revetment according to claim 2 is to lay the porous concrete compact according to claim 1 filled with a filling soil material in a river, a lake, a coastal zone of a seaside, or to form the compact. After laying in the coastal zone, filled with a filled soil material, by growing plants of the Asteraceae family, Gramineae family, Salix family, or mangrove-forming sorghum family on the surface having the irregular shape of the molded body, The feature is that the quay can be protected without damaging the natural environment and landscape.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Plants that can be preferably cultivated using the porous concrete molded product of the present invention include mugwort of the Asteraceae family, reed canary grass of the Gramineae family,
The willow of the willow family etc. can be mentioned. The porosity of the porous concrete molded body of the present invention is 15 to 25.
%, Preferably 18-23%. When the porosity is less than 15%, problems occur such as a plant having difficulty in rooting in porous concrete, and when it exceeds 25%,
The compressive strength of about 18 N / mm ² required for river revetment concrete products cannot be obtained.

The size of the porous concrete molded product of the present invention is preferably about 30 to 50 cm in length, 30 to 50 cm in width, and 5 to 20 cm in thickness from the viewpoint of ease of construction. The surface having the concavo-convex shape is usually one surface formed vertically and horizontally as shown in FIG. 1 or both surfaces including the opposite surface. The number of irregularities is preferably about 5 to 6 per surface. The height of the irregularities is preferably about 20 to 50% of the thickness of the molded body. The thickness of the molded body is preferably 5.0 to 8.0 cm in the case of mugwort, 8.0 to 12.0 cm in the case of lead canary glass, and 8.0 to 15.cm in the case of kawayanagi. It is 0 cm.

The uneven shape of the porous concrete molded body differs depending on the variety of the plant to be planted. In the case of mugwort, a mountain type or a concave type is preferable, in the case of lead canary glass, a hollow type, a mountain type or a concave type is preferable, and in the case of kawayanagi, a concave type, a mountain type or a concave type is preferable.

Here, the hollow mold means a molded body having a large number of recessed portions formed on a flat surface thereof. And
For example, as shown in FIG. 1A, the rows of the recessed portions may be displaced from each other in the left and right directions, or as in FIG. 2C, the rows may not be displaced from each other. Good. The recessed portion may have a curved surface or a flat surface. The shape of the bottom of the recessed portion is arbitrary, such as a flat surface, a curved surface, or a point.

The peak shape means that the surface of the molded body is formed of a large number of grooves (peak parts and valley parts) and the cross section of the groove is a peak shape. The cross section of the groove may be curved or may be cut out by some straight lines. The top and bottom of the cross section of the groove may be straight lines with a certain width, curved lines, or points.

The concave mold means a mold in which at least one groove is formed on the flat surface of the molded product. The cross section of the groove is
It can have various shapes such as a rectangle and a semicircle. Specific examples of these shapes are shown as (a) to (c) in FIG.
(A) is a hollow type, (b) is a mountain type, and (c) is a concave type.
The molded product of the present invention can be manufactured by a conventional method by using a mold adapted to the uneven shape. Further, in the molded article of the present invention, when a plant is grown on a surface having an uneven shape, the surface may be either a place for rooting or a place for growing a stem.

Examples of the construction method of the present invention are described below in (1)-
Shown as (3). (1) Porosity with at least one surface having an uneven shape is 15
-25% of the porous concrete compact is filled with a filling soil material, and the porous concrete compact is laid on the coastal zone without any gap so that the surface having the uneven shape is the top surface or the bottom surface, and then seeded, A method of constructing a multi-natural revetment characterized by covering it with soil. (2) The porosity of which at least one surface has unevenness is 15
After arranging the porous concrete compact of ˜25% in the upper coastal zone and the true coastal zone so that the surface having the uneven shape is the top surface or the bottom surface, and filling the porous concrete molded body with the filling soil material, A method of constructing a multi-natural revetment characterized by sowing and covering it with soil. (3) The porosity of which at least one surface has unevenness is 15
After arranging the porous concrete compact of ˜25% in the upper coastal zone and the true coastal zone so that the surface having the uneven shape is the top surface or the bottom surface, and filling the porous concrete molded body with the filling soil material, A method of constructing a multi-natural revetment that covers the soil and transplants seedlings.

As the above-mentioned filling soil material, for example, a mixture of soil generated from a water purification plant, zeolite, perlite, pulp, sodium alginate and water is used. As such a filling soil material, for example, a filling material for vegetation of voids in an alkali-cured body described in JP-A-7-327482 can be mentioned.

[0013]

EXAMPLES Example 1 Raw materials having the mixing ratios shown in Table 1 were put into a pan-type mixer, kneaded and mixed, and steam-cured after forming.
And the molded object which has each shape of (A)-(D) shown in FIG. 2 was produced.

[0014]

[Table 1]

The size of the molded block is 30 in length.
cm, width 30 cm, height 15 cm. (A) is a flat plate type, (B) is an uphill type, (B) is an upside down type, (C) is a hollow type, (D) is a concave type, and (D) is upside down. Is the downward concave type. The distance between the tops of the peaks in (B) is 10 cm, the depth of the valleys is 5 cm, the depth of the valleys in (C) is 5 cm, the width of the grooves in (D) is 10 cm, and the depth of the grooves is 5 cm. Is.

At a place suitable for the growth of mugwort on the river bank,
9 pieces (1 ward) of porous concrete compacts of various shapes filled with filled soil material are lined up, Kanuma soil mixed soil is covered by 3 cm on the surface, and mugwort is 25 g per 1 ward
Seeded. The compounding component of the filling soil material is the soil generated from the water purification plant 1
They are 5.40% by weight, 5.28% by weight of zeolite, 1.14% by weight of perlite, 0.26% by weight of pulp, 0.48% by weight of sodium alginate and 77.44% by weight of water. The results of the planting test are shown in Table 2. In the table, the fresh weight is
The dry ground weight means the weight of the cut-off above-ground plant, and the weight of the cut-off above-ground plant is dried at 105 ° C. for 15 minutes, then sealed for 8 hours and naturally cooled. The control section refers to a test section which was conducted without using the porous concrete block.

[0017]

[Table 2] From Table 2, it can be seen that, compared with the flat plate type, the downhill mountain type and the downward concave type have a larger average dry matter weight, and the wormwood grows better.

Example 2 Reed canary grass instead of mugwort 2 per ward
Planting was carried out in the same manner as in Example 1 except that 5 g was sown.
Table 3 shows the results.

[Table 3] From Table 3, it can be seen that the average dry weight is almost the same and the number of growing strains is larger in the case of the downhill type, the uphill type, the depression type, the downside concave type, and the downside type than the flat type.

Example 3 Planting was carried out in the same manner as in Example 1 except that the branches of the willow tree were cut in place of the mugwort. The results are shown in Table 4.

[Table 4] From Table 4, it can be seen that in the case of the downhill type, the uphill type, the depression type, the downside concave type, and the downside type, the average dry matter weight is large, and the growth of kawayanagi is good.

[0020]

EFFECTS OF THE INVENTION The porous concrete molded product having an uneven shape according to the present invention includes mugwort, lead canary glass,
It can grow more effectively than ever before on plants such as willow. Therefore, if this molded product is used for revegetation of a river bank or the like, the growth of plants is good and the natural environment can be protected.

[Brief description of drawings]

FIG. 1 is a diagram showing a specific example of each shape of (a) hollow type, (b) mountain type, and (c) concave type.

FIG. 2 is a flat plate type used in Examples, (B) mountain type,
It is a figure which shows the porous concrete molded object of each shape of (C) hollow type and (D) concave type.

Claims (2)

[Claims] 1. A plant cultivating body having a concavo-convex shape on at least one surface and having a porosity of 15 to 25%, wherein plants are grown using the surface having the concavo-convex shape. Porous concrete molding. 2. The porous concrete compact according to claim 1 filled with a filling soil material is laid in a coastal zone of a river, lake, or sea, or after the compact is laid in a coastal zone, the filled soil is filled. The coastal zone without impairing the natural environment or landscape by filling with wood and cultivating plants of Asteraceae, Gramineae, Salixaceae or mangrove-forming sorghum on the surface of the molded product having irregularities. A method of constructing a multi-natural revetment that protects the sea.