JP3073392B2 - Greening spraying material and greening spraying method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a greening spraying material used for spraying green soil such as a greening zone beside a road, and a greening spraying method using the same.

[0002]

2. Description of the Related Art Conventionally, to protect a surface such as an inclined surface beside a road, greening of this surface has been performed. As a method for protecting the surface, there is a method such as solidification of the surface by spraying mortar, but there is a risk that the mortar may be broken or dropped due to deterioration, and is inferior to greening. In addition, greening is far superior in terms of influence on the surrounding environment, landscape, and the like, and greening zones are often provided for surface protection.

[0003] Various methods have been proposed for this revegetation. Usually, revegetation (for example, turf) seeds are mixed with soil and water, sprayed onto a surface, and sprayed to make revegetation. Have been done.

[0004] Here, seeds cannot be fixed on a surface only by soil and water. In particular, if it rains before the seeds settle on the surface, the seeds flow along with the sprayed soil and the desired greening cannot be performed. Therefore, when mixing, a paste material is added in accordance with these. Since this glue material solidifies after spraying, the seeds can be fixed on the surface together with the sprayed soil, and subsequent runoff due to rain can be prevented.

[0005]

However, it takes several days to solidify the paste material and several days to obtain stability after spraying. Therefore, if it rains before stabilization, the entire spraying surface will run off, and there is a problem that the work of greening spraying must be restarted at a later date.

Further, in the conventional method, a polymer resin material is used as a glue material. This polymer resin fixes the sprayed surface by its curing, but the curing makes the surface very hard. Then, when the germination state of the plant from the actual sprayed surface was examined, a crack was generated on the sprayed surface due to the hardening of the resin, and germinated from the crack. Therefore, it was found that there was no germination from most surfaces and the germination rate was considerably low.

The present invention has been made in view of the above problems, and provides a greening spraying material which is stable immediately after spraying and can increase the germination rate, and a greening spraying method using the same. The purpose is to:

[0008]

The greening spray material of the present invention is used for greening the sprayed ground after mixing with plant seeds, soil and water, and then spraying the mixture on the ground. a greening spraying material, seen containing a ash consisting of inorganic particulate, such as fly ash, and calcium compounds described below, the following acidic substances, substantially containing the polymeric adhesive material
Is characterized by the fact that

Incinerated ash such as fly ash is made of an inorganic material such as silicon, aluminum, calcium, etc., and its surface is porous because organic substances are removed during incineration. When this is mixed with soil, water, or the like, ettringite (3CaO.Al ₂
O ₃ .3CaSO ₄ .32H ₂ O) and CSH (calcium silicate hydrate) are generated, and the sprayed soil and the like are held on the ground. Therefore, even if it rains immediately after the spraying operation, runoff of the sprayed surface is very small, and the greening of the ground can be performed effectively. In particular, in the present invention,
Since the calcium compound and the acidic substance are added, calcium in the above reaction can be supplemented, and the reaction can be promoted by the acidic substance.

[0010] The incinerated ash is fly ash or sludge ash (PS ash) discharged from a papermaking process. Fly ash and sludge discharged from the papermaking process have a high ettringite generation ability and are very preferable as components of greening spraying materials. In addition, it is necessary that the sludge discharged from the papermaking process has not been subjected to chlorine-based bleaching treatment.

The calcium compound is calcium sulfate. By utilizing calcium sulfate, calcium can be replenished and acidity can be maintained. In addition, since calcium sulfate itself has a solidifying ability, the solidification reaction can be promoted.

Further, the acidic substance is aluminum sulfate. By aluminum sulfate
In addition to maintaining acidity, it can promote coagulation and solidification.

Further, the present invention is characterized in that after the seed, soil, water and the above-mentioned greening spraying material are mixed, this mixture is sprayed on the ground to green the sprayed ground.

[0014]

Embodiments of the present invention will be described below. In the present invention, first, greening spraying material, seeds, soil for guest soil,
Mix with bark compost and chemical fertilizer. For this mixing, put these in a tank, add an appropriate amount of water,
Performed by mechanical stirring. And, after mixing,
The mixture is sprayed on the ground to be greened by the pump. The thickness of the spray mixture is about 1 cm.

[Components of greening spraying material] Greening spraying material is 5 to 30 parts by weight of aluminum sulfate, 10 to 50 parts by weight of calcium salt (calcium sulfate), and 0.1 to 10 parts by weight of alkali metal carbonate (potassium carbonate). Parts by weight, 10 to 20 parts by weight of silica (silicon oxide) or silica fume (amorphous silicon oxide), and fly ash or paper pulp incineration ash (PS ash) 40 to 9
0 part by weight and a silica compound comprising 10 to 60 parts by weight of Portland cement. The greening spray material is obtained by mixing 80 to 90 parts by weight of the silica compound with 10 to 30 parts by weight of the aluminum compound. Note that titanium oxide may be added to the aluminum compound.

[Reaction] When sprayed on the ground, in the greening spraying material of the present invention, fly ash or paper pulp ash rapidly removes moisture in the soil by its porous surface. While being absorbed, solidification is started by the gypsum component, aluminum oxide, silicon oxide and the like contained therein.

The added calcium salt (calcium sulfate) further promotes the solidification reaction of fly ash and the like. Further, the silica-based component also compensates for the shortage of the hardened component, but also contributes to the formation of reticulated ettringite and calcium silicate hydrate (CSH).

Ettringite is 3CaO.Al ₂ O ₃
It has a chemical structure of 3CaSO ₄ .32H ₂ O, and consumes water by a hydration reaction in its production. Water is also consumed by the generation of CSH. At this time, the mixed soil etc. and the soil on the ground side are slightly taken in, so that the net-like ettringite is firmly fixed on the ground, and even if it rains, the sprayed seeds etc. may flow. Absent.

Further, when silica fume is used, the reaction is promoted by the crystallization because the silica fume has an amorphous structure. In addition, the interaction with the cement produces silica-based hard crystals, which can firmly adhere to the ground.

Hydrolysis to aluminum sulfate produces polycondensation ions of aluminum hydroxide, which form a polymer structure (network structure), and adsorb soil particles and the like. Furthermore, since aluminum sulfate is an acidic substance, it can prevent alkalizing of the greening ground.

The alkali carbonate promotes the elution of the reactive ions Si ⁴⁺ and Al ³⁺ from the siliceous material forming a part of the ash component, and can promote the solidification. Cement also promotes solidification.

Various substances are complicatedly related, and various solidification reactions occur while taking in soil and the like. For this reason, the mesh-like tissue is firmly fixed on the green ground while holding the seeds, soil, and the like. Therefore, even if it rains, seeds do not flow away.

[Experimental Examples] When various types of greening were performed by the greening method of the present invention, greening was very effectively performed. For example, when about one hour passed after the completion of the construction, the sprayed soil did not flow away at all under normal rain.

Further, since the sprayed soil of the present invention has a mesh structure, germination was obtained from the entire sprayed surface, and effective greening was performed.

Further, since the fixing force is very strong, the lath net used in the conventional spraying is not required. For example, it was confirmed that a volcanic ash embankment (tilt 30 degrees) near Unzen Fugendake was sprayed without a lath net and did not run off at all.

In the Sapporo Moiwa Dam, shore spraying was performed by the greening spray of the present invention. This spraying chopped the roots of "accumina" and sprayed instead of seeds. As a result, it was possible to plant the aquatic plant "Salix serrata" in places that repeatedly exposed and submerged depending on the level of the water level.

Further, when the greening of the present invention was performed in Hokkaido, the greening could be maintained even after thaw. Here, at a site where greening was carried out using a conventional greening material containing a high-molecular adhesive material, the high-molecular resin freezes during the winter under the snow, and with the melting of the snow, the high-temperature degradation of these high-molecular agents As a result, there was a problem that the soil returned to the smooth soil, which was washed away by the thaw, and returned to the state before the construction. In the present invention, it has been confirmed that such a drawback can be overcome, and the surface after the thaw can be maintained as it was at the time of construction.

The formation of the surface of the greening spray according to the present invention is attributable to the formation of a hydrate of a mineral hardening reaction such as ettringite and CSH by a hydration reaction involving the soil particles themselves. The newly created product is a mineral agglomeration formed around the fine soil particles themselves. There, the aggregated mineral retains its capacity of water. This water retention effect promotes germination, and by holding the subsequent rain for a long time,
It can help plants grow and maintain a lush green surface.

In addition, since these mineral products are generated in such a manner that ivy is entangled, microscopically, a fine net layer is superimposed on the construction surface in any number of layers. For this reason, the air permeability of the soil is maintained forever, and the conditions required by the plants, ie, water and air, can always be maintained.

Further, at the time of construction, fertilizer such as bark compost is mixed and sprayed together, and this is taken into large agglomerated particles, so that the holding power of the fertilizer itself becomes very large. Further, since the air permeability is good, the water permeability is also good, and a proper moisture can be always maintained, and a construction surface excellent in air permeability and water permeability can be realized.

[0031]

As described above, according to the greening spraying material of the present invention, when incinerated ash such as fly ash is mixed with soil, water, etc., ettringite ( 3CaO.Al ₂ O ₃ .3CaSO ₄ .3
2H ₂ O) and CSH (calcium silicate hydrate) are generated, thereby keeping sprayed soil and the like on the ground.
Therefore, even if it rains immediately after the spraying operation, runoff of the sprayed surface is very small, and the greening of the ground can be performed effectively. In particular, in the present invention, since the specific calcium compound and the specific acidic substance are added,
Calcium in the above reaction can be supplemented, and the reaction can be promoted by the above acidic substance.

Further, fly ash and sludge discharged from a papermaking process have a high ability to produce ettringite, and are very preferable as components of greening spraying materials.

Further, by using calcium sulfate, calcium can be replenished and acidity can be maintained. In addition, since calcium sulfate itself has a solidifying ability, the solidification reaction can be promoted.

The aluminum sulfate can not only maintain acidity but also promote coagulation and solidification.

After mixing the seed, soil, water and the above-mentioned greening spraying material, the mixture can be sprayed on the ground to effectively green the sprayed ground.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A01G 1/00 303 E02D 17/20 102

Claims (3)

(57) [Claims] 1. A greening spraying material used for planting seeds, soil and water, then spraying the mixture on the ground, and greening the sprayed ground. and ash consisting of equipment, the calcium sulfate is calcium compounds, see containing a aluminum sulfate acidic substance, greening spraying materials, wherein substantially free of polymeric adhesive material. 2. The greening spray material according to claim 1, wherein the incinerated ash is fly ash or sludge ash (PS ash) discharged from a papermaking process. 3. A greening spraying method for mixing plant seeds, soil, water and a greening spraying material, and then spraying the mixture on the ground to green the sprayed ground. A greening spraying method, comprising using the greening spraying material according to any one of claims 1 to 2.