JPH03180618A - New type base material for greeting slope face - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Part 1 The present invention relates to a novel slope greening base material (hereinafter referred to as base material) used in a slope greening method by seed spraying.

The slope greening method by spraying Ichizuchi LL Shien seeds has a soil hardness of 20 to 111.
In situations where it is difficult for seeds to directly take root on hard cut slopes with a grade of 11 or higher (as measured by a Yamanaka hardness tester), seeds are mixed into such surfaces depending on the slope and geology. Spraying base material (artificial soil) or soil (additional soil),
It is known as a method for stabilizing the greening of slopes by forming a layer with a thickness of 3 to 5 aa, allowing plants to grow to a certain extent, and then allowing roots to penetrate into hard ground through the action of soil bacteria.

However, it is difficult to put it into practical use on steep, hard geological slopes with an inclination of 60 degrees or more, and various studies have been conducted so far.

For example, JP-A-63-55217, JP-A-63-2
As described in Publication No. 26411, greening base materials are stabilized by using adhesive materials such as polyvinyl alcohol (PVA) and vinyl acetate emulsions, and water retaining materials such as polyacrylic acid water-absorbing resins. is being attempted.

In addition, cement, synthetic resin, etc. may be used to stabilize the soil.

However, as mentioned above, when adhesives and water-retaining materials are added to the wood fibers that are the base material for greening, the entire base material becomes dense and loses its breathability, or it dries out. The problem is that the soil surface hardens and hardness increases, which impairs the germination of seeds and prevents sufficient greening. Also,
New processes have been added to ensure uniform dissolution and dispersion of adhesives and water-retaining materials, and it takes a long time to make greening materials from steel, making workability worse, and each material inhibits seed germination. It also has disadvantages, and furthermore, it has a disadvantage that the commercial price is high and it is not economical.

In addition, when using cement or synthetic resin, the water absorption of seeds
In the summer, if the drought continues, the seeds may wither and die, so their value as a greening material is low.

Therefore, it is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide a base material that has curing properties, adhesive properties, and water retention properties, and in particular, it is an object of the present invention to provide a base material that has curing properties, adhesive properties, and water retention properties. It is an object of the present invention to provide a base material that prevents seeds from flowing out or withering during construction, has good workability, and is easy to perform stable construction.

The present inventors have discovered that a mixture of industrial waste starch lees, carboxymethyl ether salts of starch lees, and park compost can be used as a base material for thick-layer spraying, which is superior to conventional base materials. The present invention was achieved by discovering that it can be used as an innovative greening material that cannot be seen.

That is, the base material of the present invention is used in a slope greening method by seed spraying, and contains 40 to 90% by weight of starch residue and an average degree of ether substitution by carboxymethyl groups of 0.1 to 1.0. 0.1 to 20% by weight of carboxymethyl ether salt of starch meal, and 10 to 6% of park compost.
It is characterized by consisting of 0%.

The starch lees used in the present invention are generally the lees after removing B powder from potatoes (e.g., sweet potatoes, potatoes, etc.) or legumes (e.g., soybeans, corn, etc.); It is not limited to konjac potato lees, citric acid lees, or pulp lees. is the main component, and also contains some proteins, lipids, pectin, mannan, lignin, etc. In addition, starch meal is
It may be used as a single product or as a mixture of various starch meal products.

Next, carboxymethyl ether salts of starch meal (hereinafter referred to as
CML) is a carboxymethyl ether salt obtained by adding an alkali to starch lees, reacting with monochloroacetic acid or an alkali monochloroacetic acid salt to cause an etherification reaction, and then preparing it with an aqueous methanol solution and drying it. It is.

Average degree of ether substitution by carboxymethyl groups (DS
) is 0.1 to 1.0, preferably 0.1 to 0.5 in use. CML's 2% water soluble 25
The viscosity at °C is 5 to 2000 cP (measured with a B-type viscometer)
This viscosity value is not particularly limited in use, and the raw material for CML may be a single product or a mixture of B powder cakes.

The types of ether salts of CML include sodium (Na) salt, potassium (K) salt, lithium (Li) salt, calcium (Ca) salt, ammonium (
For example, Na-CML represents carboxymethyl ether sodium salt of starch meal. N contained in CML
The salt content of aC1 etc. is 10% or less, preferably 5% or less.

As a specific production example, a production example of Na-CML in which the average degree of ether substitution by carboxymethyl groups is 0.4.25°C and the viscosity of a 2% aqueous solution is 600 cP is shown below, but the present invention is not limited by these. It is not something that will be done.

80 kg of sweet potato starch meal dried to a moisture content of 15% or less was placed in a 6001 ribbon blender, 112.6 kg of a 14% by weight caustic soda 60% methanol aqueous solution was added, and further 38.8 kg of a 50% monochloroacetic acid solution dissolved in 60% methanol was added. After etherification at 70°C for 70 min, the remaining solvent was removed and 75% methanol 200
By washing twice at 0cc and drying at 80°C, the average degree of ether substitution by carboxymethyl groups was 0.4.
Na-CML having a 2% aqueous solution viscosity of 600 cP measured at 25° C. using a B-type viscometer can be obtained.

Next, park compost is made by composting bark and sawdust over a long period of time using soil bacteria.It usually contains 30 to 70% moisture, but it may be used (compounded) with a moisture content of 30% or less.

By using park compost, it is possible to prevent the growth of mold and rot in the moist state of starch meal, which has the effect of promoting the germination of seeds.

As mentioned above, the base material of the present invention has an average degree of ether substitution of 6 flours and carboxymethyl groups of 0°1 to 1.0 (
It is a mixture of CML (preferably 0.1 to 0.5) and park compost, and the blending ratio is 40 to 9
0% by weight, CML 0.1-20% by weight (preferably 1-10% by weight), and park compost 10-60% by weight.

These base materials can be obtained by arbitrarily mixing the above three components in accordance with the above blending ratio using a mixer having a mixing mechanism.

In addition, when using the base material of the present invention, it is preferable that the pH when dispersed in water is adjusted within the range of 5 to IO.

Standing: The condition of the slope surface after seed spraying using the mixture of starch meal, CML, and park compost, which is the base material of the present invention, is sticky in a wet state, and the surface after spraying is soft and germination. It is characterized by its ability to promote sex and retain water.

This is because the starch lees and CML that make up the base material of the present invention have water-retentive properties, and the adhesive component CML quickly dissolves in water. This is thought to be due to maintaining appropriate contraction.

Therefore, by using the base material of the present invention, it is possible to solve the problem of opening that always lacks any one of adhesiveness, germination properties, and water retention properties, which was a problem in the prior art.

This results in a hardness of 2 which normally prevents seeds from taking root.
Thick blowing (thickness 3-5c
o+) is possible, and there is no runoff due to rain, etc., and there is no problem of poor germination due to drying, so there is no need for rework as in the conventional technology8.The base material of the present invention is used. By mixing appropriate fertilizers, etc., the growth of the plants after germination will be better, and stable slope coverage will be achieved at an early stage.

Further, the base material of the present invention does not require the addition of a new caking agent or water retaining material, and workability and economical efficiency are greatly improved.

Next, examples of the present invention will be shown, but the present invention is not limited by these examples.

Next, the test method in the example is shown, and the test period is 6
~September, and all Examples and Comparative Examples were conducted on the same day.

[Germination rate]

Seeds were added to the base material consisting of starch meal, CML, and park compost, mixed uniformly, and then water was added and kneaded to form a concrete artificial slope with a height of 370ca x width of 92cm and a slope of 60" and a thickness of 3o. Spray with a dry mortar gun (Nogami Seisakusho, BO type) so that
, 1ffl).

- Determine the number of germination after a week, and define the germination rate as a percentage of the theoretical number of germination.

[Collapse rate]

A mixture (substrate material) of starch meal, CML, and park compost from which seeds have been removed from the above germination rate test is mixed with water, sprayed in the same manner as above, and left outdoors (with a roof). After a week, 6000 cc of artificial rain was applied evenly over the entire slope for 3 minutes, and the amount of runoff was measured, and the percentage of the original base material was taken as the collapse rate.

[Water retention rate] Starch meal necks with seeds removed using the same operating method as the above test,
Add water to a mixture of CML and park compost (base material), knead it, leave it outdoors (with a roof, at an outside temperature of 20 to 30 degrees Celsius), and spray it. After a week, measure the residual moisture content relative to the moisture content of the base material at the time of spraying. The water retention rate is expressed as a percentage of the amount.

Example 1 Sweet potato starch meal 16.2 kg (82.4% by weight),
Park compost 3.0Kg (15.3% by weight) and Na-
CML (raw materials: sweet potato starch meal, O5O, 25,2
Viscosity of a 2% aqueous solution by B type viscometer at 5°C: 11
02cP) 456 (2°3% by weight) with 0.1kg of fertilizer added and mixed, 60g of weaving love grass seeds were evenly mixed in the mixture,
151' of water was gradually added to an artificial concrete slope with a side of 92 CIm and a slope of 60'' to a thickness of 3 cm, and spraying was carried out using a small mortar gun. Outdoors (
After that, the number of germination was counted and the germination rate was determined.The same experiment as above was carried out except that no seeds were added. The results are shown in Table 1 along with the results.

Example 2 Sweet potato starch meal 15.4Kg (18.4% by weight)
Citric acid residue 26.52Kg (31.6% by weight), Park compost 39.72Kg (47.3% by weight) and N
a-CML (Raw material: sweet potato starch meal, 050.37
．． Double measurement using a B-type viscometer at 25°C! % aqueous solution viscosity 140cP) 2.27Kg (2.7% by weight) and 0.3Kg of fertilizer was added and mixed, while uniformly mixing 60g of weaving love grass seeds.
9 Germination rate, decay rate, which was conducted in the same experiment as Example 1
Table 1 shows the results of determining the water retention rate.

Example 3 Sweet potato starch meal9. OIKg (24.2% by weight)
Corn starch meal 6.60Kg (17.7% by weight
), park compost 20.88Kg (56, 1!u ff
i%) and Na-CML (raw material: Tomorrow-y Si g tj) r white, DSO, 35, B at 25 °C
2 wt% aqueous solution viscosity 70 cP) 744 g by type viscometer
(2.0% by weight) with 0.1 kg of fertilizer added to the base material, and 6 seeds of rye; bing love grass.
After uniformly mixing the mixture to which 0 g was added, an experiment was conducted in exactly the same manner as in Example 1. The results of the germination rate, disintegration rate, and water retention rate are shown in Table 1.

Example 4 Sweet potato starch meal 26.52Kg-(59.0% by weight)
, Park compost 14.64Kg (32.6% by weight) and Na-CML (2% by weight aqueous solution viscosity 380cP by B-type viscometer at O50° 24.25°C) 3.78K
Weaving love grass seeds 6
After uniformly mixing the mixture to which 0 g was added, an experiment was conducted in exactly the same manner as in Example 1, and the germination rate, disintegration rate, and water retention rate were determined. The results are shown in Table 1.

Example 5 Sweet potato starch meal 82.04Kg (75.6wt 1%),
Park compost 25.2Kg (23.2% by weight) and N
a-CML (viscosity of 2 wt% aqueous solution 1100 cP by B-type viscometer at O50° 47.25°C) 1.30K
Weaving love grass seeds 6 were added to a base material consisting of 0.5 g of fertilizer (1.2 MN%) and mixed with 0.5 g of fertilizer.
After uniformly mixing the mixture to which 0g was added, the same experiment as in Example 1 was conducted to determine the germination rate, disintegration rate, and water retention rate.The results are shown in Table 1.

Comparative example! Instead of the base material of sweet potato starch meal, Na-CML, and park compost mixture in Example 1, 6 kg of green mud (wood fiber) with a moisture content of 30% (50,0% by weight) and 6 kg of peat moss (peat) (50,0% by weight) were used. 0
Table 1 shows the results of the germination rate, disintegration rate, and water retention rate of an experiment conducted in exactly the same manner as in Example 1, except that 1% by weight was used.
Shown in 1.

Comparative Example 2 Instead of the base material of sweet potato R meal, Na-CML, and park compost mixture in Example 1, Green Matsuro Kg (50.0% by weight) and peat moss 5.724Kg (47.7% by weight) with a moisture content of 30% were used. % by weight) and 276 g of a commercially available vinyl acetate emulsion (2,
Table 1 shows the results of the zero germination rate, disintegration rate, and water retention rate of an experiment conducted in exactly the same manner as in Example 1, except that 3% by weight) was used.

Comparative Example 3 Instead of the base material of sweet potato starch meal, Na-CML, and park compost mixture in Example 1, green mandolo Kg (50.0% by weight) and peat moss 5.616Kg (46.8% by weight) with a moisture content of 30% were used. %), and 276 g (2.3% by weight) of a commercially available vinyl acetate emulsion was used as the adhesive.
An experiment was carried out in exactly the same manner as in Example 1, except that 108 g (0.9% by weight) of a commercially available polyacrylic acid resin was added as a water retaining material. Table 1 shows the results of germination rate, disintegration rate, and water retention rate.

The base material of the present invention is a greening material that has all of the properties of curing, adhesiveness, and water retention, and is an epoch-making product unprecedented in conventional technology. Therefore, if the base material of the present invention is used, seeds will be prevented from flowing out and dying during the period from sowing to germination, and there will be no need for rework as in the conventional technology. greening of slopes,
Protection can be achieved in a short time.

Furthermore, since the base material of the present invention has quick dispersibility in water,
Preparation work for spraying can be completed in a short time, greatly improving work efficiency.

Furthermore, the present invention can greatly contribute to the reuse of resources by effectively utilizing starch meal, which is an industrial waste and has become a major problem in environmental hygiene.

Claims (1)

[Claims] A slope greening base material used in the slope greening method by seed spraying, comprising 40 to 90% by weight of starch meal and an average degree of ether substitution by carboxymethyl groups of 0.1 to 1.0.
Carboxymethyl ether salt of starch meal is 0.1~
A novel slope greening base material comprising 20% by weight of park compost and 10 to 60% by weight of park compost.