JP2006265504A - Hardening material containing charcoal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a hardening material that imparts strength to soft soil and sludge and promotes slaking ability, cleaning ability, ventilation ability and reduction ability being proper power of soil. <P>SOLUTION: The hardening material comprises 100 parts wt. of a composition composed of light burned magnesia, another fertilizer except light burned magnesia and an alkali neutralizer and 0.5-10 parts wt. of charcoal. The hardening material provides soft soil and sludge with strength and soil with energy and cleans the environment. Soil is hardened with the hardening material to give hardened soil, which is reused as a soil material for a sport ground. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solidifying material that gives strength to soft soil and sludge and enhances digestion ability, purification ability, ventilation ability, and reduction ability, which are the inherent powers of soil.

  Soft soil and sludge soil cannot be used as farmland because the conditions for growing crops are not met. Moreover, it is not easy to enter the soil as it is. To improve the soil quality of soft soil and sludge, a solidification process using a solidifying material is performed. Further, the solidifying material is used not only when improving the soil quality of soft soil and sludge, but also when carrying out soil, corroded soil, etc. generated by civil engineering work. In this case, after carrying out the solidification treatment of the soil, it is carried out. So far, solidification treatment of soil using cement-based and lime-based solidifying materials has been carried out.

Cement-based and lime-based solidified materials are composed of inorganic powders such as cement and quicklime, and are solidified and hardened by hydration when they are kneaded with water and poured into a mold or left to stand. A structure rich in durability can be formed by solidifying with cement-based and lime-based solidifying materials. However, cement-based solidified materials inevitably contain hexavalent chromium (Cr ⁶⁺ ) in the raw material, and there is concern about the outflow. Moreover, organic soil and high water content soil cannot be hardened enough. In addition, soil solidified using cement-based and lime-based solidified materials has a strong alkalinity with a pH of about 11 to 14, and organisms are less likely to adhere to and propagate. Furthermore, the leachate produced by the infiltration of rainwater, groundwater, etc. into the improved soil may cause adverse effects on the surrounding environment, that is, cause alkali pollution. In order to prevent this, attempts have been made to neutralize using acidic chemicals. In this case, however, the solidification strength of the improved soil is reduced, and the required strength may not be obtained. It was.

  Solidification materials containing light-burned magnesia as a component have been developed as solidification materials other than cement-based and lime-based solidification materials. Patent Document 1 discloses a soil hardening composition mainly composed of light-burned magnesia. Patent Document 2 discloses a soil-solidifying material containing light-burned magnesia. Patent Document 3 discloses a solidification material for sludge containing light-burned magnesia. The solidified material composed of light-burned magnesia not only has the same solidifying action as cement-based and lime-based solidified materials, but also lowers the pH compared to soil using cement-based and lime-based solidified materials. It has become a less burdensome environment that eliminates the alkalinity of the soil. Further, even if the lightly burned magnesia solidified product is pulverized and mixed with soil, it does not affect the soil environment and has the advantage that it is reduced as fertilizer.

On the other hand, soil has a function as a base for plant production, and at the same time, plays a major part in the elemental circulation on the earth and keeps the habitat of organisms constantly. The flow of element circulation in the soil is shown below. 1. Effective microorganisms in the soil decompose organic matter in the soil, such as fallen leaves and animal manure. 2. The degradation products are reduced to the soil, resulting in a vigorous soil. 3. Vigorous soils further demonstrate digestive, remedial, aeration, and reducing capabilities.
Japanese Patent Laid-Open No. 2001-200252 JP 2003-13063 A JP-A-2005-13973

  As described above, the solidified material using light-burned magnesia has advantages compared to cement-based and lime-based solidified materials, but a sufficient effect is obtained with respect to the effect of making the soil vigorous and purifying the environment. It is not done. For this reason, there is a demand for a solidifying material that has an excellent effect as a solidifying material, and has a vigorous soil and an effect of purifying the environment.

  Therefore, an object of the present invention is to provide a solidified material that gives strength to soft soil and sludge and enhances digestion ability, purification ability, ventilation ability, and reduction ability, which are the inherent powers of soil.

  As a result of diligent examination in view of the above problems, by adding charcoal to the solidified material containing light-burned magnesia, soft soil and sludge are given strength, and the soil's natural powers are digestion capacity, purification capacity, ventilation capacity. The present inventors have found that a solidified material that enhances the reducing ability can be obtained, and have arrived at the present invention.

  The solidified material according to claim 1 of the present invention is a solidified material that solidifies soil, and includes light burned magnesia, fertilizer other than light burned magnesia, and charcoal.

  The solidified material according to claim 2 of the present invention is a solidified material for solidifying soil, in which 0.1 part by weight of the composition containing light burned magnesia, other fertilizers other than light burned magnesia, and an alkali neutralizer. It contains 5 to 10 parts by weight of charcoal.

  A solidified material according to a third aspect of the present invention is the solidified material according to the first or second aspect, wherein the charcoal includes carbonized industrial waste.

  The solidified material according to claim 4 of the present invention is the solidified material according to claim 3, wherein the industrial waste is any one or more of livestock manure, rice husk, wood chips, vegetation or food. And

  The solidification material according to claim 5 of the present invention is the solidification material according to any one of claims 1 to 4, wherein the charcoal is pulverized coal.

  The method for producing a soil solidified product according to claim 6 of the present invention is characterized in that the solidified material according to any one of claims 1 to 5 is added to the soil and stirred.

  The soil solidified product according to claim 7 of the present invention is obtained by the method for producing a soil solidified product according to claim 6.

  The solidified material according to claim 8 of the present invention is a solidified material for solidifying soil, which includes charcoal as a constituent component and rich in fertilizer components, improves soft soil and gives vitality to the soil, and is suitable for crops and greening. It is characterized by that.

  According to claim 1 of the present invention, light-burned magnesia becomes magnesium hydroxide when combined with moisture in the soil, and then reacts with carbon dioxide in the air to increase the strength of the soil. The soil solidified product has a low pH and a low environmental impact. In addition, microorganisms propagate in many holes of charcoal, thereby demonstrating the natural ability of the soil, decomposing nuts, fallen leaves, animal excrement and carcasses, and other septics, and activating the soil. For this reason, the soil suitable for production of plants, such as farm products, is provided. In addition, vigorous soil also has a function of purifying unpleasant odors such as rot odors from the rots, thus providing an environment where people can easily live. Moreover, while lightly burned magnesia itself becomes a fertilizer as a magnesium component, the effect of activating the soil can be enhanced by adding other fertilizers other than lightly burned magnesia. Furthermore, since charcoal has a deodorizing action from the beginning, the effect of purifying unpleasant odors such as spoiled odors can be enhanced.

  According to claim 2 of the present invention, light burned magnesia becomes magnesium hydroxide when combined with moisture in the soil, and then reacts with carbon dioxide in the air to increase the strength of the soil. The soil solidified product has a low pH and a low environmental impact. In addition, microorganisms propagate in many holes of charcoal, thereby demonstrating the natural ability of the soil, decomposing nuts, fallen leaves, animal excrement and carcasses, and other septics, and activating the soil. For this reason, the soil suitable for production of plants, such as farm products, is provided. In addition, vigorous soil also has a function of purifying unpleasant odors such as rot odors from the rots, thus providing an environment where people can easily live. Moreover, while lightly burned magnesia itself becomes a fertilizer as a magnesium component, the effect of activating the soil can be enhanced by adding other fertilizers other than lightly burned magnesia. In addition, the alkali neutralizing agent neutralizes the alkaline component of the solidified material and provides a neutral soil environment that is suitable for plant plants containing microorganisms in the soil. Furthermore, since charcoal has a deodorizing action from the beginning, the effect of purifying unpleasant odors such as spoiled odors can be enhanced.

  According to claim 3 of the present invention, industrial waste can be effectively disposed of by carbonizing industrial waste and using part or all of it as charcoal of the present invention. This industrial waste is decomposed and purified in the soil, and at the same time, it is reduced into the soil as an organic substance and has an effect of giving vitality to the soil. Furthermore, it has the effect of purifying the unpleasant odor of industrial waste by the deodorizing action of charcoal.

  According to claim 4 of the present invention, industrial waste such as livestock manure, rice husk, charcoal, vegetation, food is carbonized, and part or all of the industrial waste is used as the charcoal of the present invention. Can be disposed of effectively. This industrial waste is decomposed and purified in the soil, and at the same time, it is reduced into the soil as an organic substance and has an effect of giving vitality to the soil. Furthermore, it has the effect of purifying the unpleasant odor of industrial waste by the deodorizing action of charcoal.

  According to claim 5 of the present invention, charcoal can be evenly distributed in the solidified material by using charcoal as pulverized coal. Moreover, since it does not take up the volume of an object when it is powdery, it becomes easy to handle.

  According to the method for producing a solidified soil according to claim 6 of the present invention, soft soil or sludge is given strength, and digestive ability, purification ability, aeration ability, and reduction ability, which are the inherent powers of soil, are enhanced. For this reason, the production of crops and the greening of soil can be promoted. In addition, the effect of purifying unpleasant odors such as spoiled odors can be enhanced by the deodorizing action of charcoal. Furthermore, the solidified soil solidified by this production method can be carried out according to the purpose.

  According to claim 7 of the present invention, a solidified soil solidified by the production method according to claim 6 can be obtained. The soil solidified product can be taken out according to the purpose. These exported soil solidified materials include road roadbed embankments, backfilling of structures, road road embankments, road slopes and road median strip materials, river bank embankment materials, etc. It can be reused appropriately and suitably for applications such as soil improvement soil for building land, parks and green spaces, soil for sports ground, cultivated soil for vegetation, beach sabo forest zone and desertification zone . Moreover, water quality can be purified by carrying out soil solidified material obtained by solidifying the bottom mud deposited in rivers and lakes. Furthermore, the soil, corroded soil, etc. generated with civil engineering work can be carried out easily.

  According to claim 8 of the present invention, the component contains charcoal, is rich in fertilizer components, improves soft soil and gives vitality to the soil, and therefore provides soil suitable for crop production and soil greening. be able to.

  Hereinafter, embodiments of the present invention will be described in detail.

  The present invention relates to a solidified material for solidifying soil, comprising light-burned magnesia, fertilizer other than light-burned magnesia, and charcoal. The solidified material may contain any chemical substance other than light burned magnesia, fertilizer other than light burned magnesia, and charcoal. What constitutes the solidifying material may be uniformly mixed to form a solidified powder.

  The solidified material of the present invention may contain 0.5 to 10 parts by weight of charcoal with respect to 100 parts by weight of the composition containing light burned magnesia, other fertilizers other than light burned magnesia, and an alkali neutralizer. it can. In the present invention, the weight ratio of light-burned magnesia, fertilizer other than light-burned magnesia, and alkali neutralizer is as follows: light-burned magnesia: other fertilizer: alkali neutralizer = 65-85: 2-8: 15-25 A more preferable weight ratio is light-burned magnesia: other fertilizer: alkali neutralizer = 75: 5: 20. Light solid magnesia, other fertilizers other than light calcined magnesia, and solidified material containing 0.5 to 10 parts by weight of charcoal with respect to 100 parts by weight of the composition containing an alkali neutralizer, obtain a strong soil solidification effect. be able to. When charcoal is 0.5 parts by weight or less, the effect of charcoal is weak, and when charcoal is 10 parts by weight or more, the soil solidification effect is weakened and is not suitable as a soil solidifying material. A solidified material containing about 5 parts by weight of charcoal is particularly preferable with respect to 100 parts by weight of the composition containing light burned magnesia, other fertilizers other than light burned magnesia, and an alkali neutralizer.

  The light-burned magnesia used in the present invention is obtained by baking magnesium carbonate at around 800 ° C. Lightly burned magnesia becomes magnesium hydroxide when combined with soil moisture, and then reacts with carbon dioxide in the air to increase the strength of the soil and has a lower pH and less environmental impact than cement-based and lime-based solidified materials. Soil solidified material. The magnesium component is an essential element necessary for plant growth, and light-burned magnesia also has a function as a fertilizer.

  Conventionally known fertilizers are used as fertilizers other than light-burned magnesia used in the present invention. Examples include nitrogen fertilizers such as urea, ammonium sulfate and lime nitrogen, phosphate fertilizers such as superphosphate lime and dissolved phosphorus fertilizer, potassium fertilizers such as potassium chloride, cow manure compost, oil grounds, fish grounds, bone meal, etc. Fertilizer is mentioned.

  The alkali neutralizer used in the present invention is not limited as long as it is a substance that can neutralize the alkaline solidifying material component. The light neutralized magnesia that is alkaline can be neutralized by the alkali neutralizer. Moreover, an alkaline solidifying agent component can be neutralized with an alkali neutralizing agent to provide a neutral soil environment that is suitable for plant plants containing microorganisms in the soil. Examples of the alkali neutralizer include oxalate, citrate, phosphate, sulfate and the like.

  The charcoal of the present invention refers to a material made by carbonizing wood or the like, but its production method is not limited. For example, black charcoal is produced by carbonizing wood at a temperature of 400 ° C. to 700 ° C., removing heat and then removing it. On the other hand, white charcoal is produced by putting air in the middle of baking in a kiln, raising the temperature to about 1000 ° C., and finally taking it out from the kiln and applying ash. It is good also as a manufacturing method of charcoal using steam. Moreover, you may use the charcoal of this invention as pulverized coal in a powder state. Further, a combination of these may be used. The charcoal has the following effects: 1. Provide an environment where microorganisms can grow in the pores of charcoal; 2. Energize the soil 3. has a purifying action; It has been known that it has a deodorizing ability.

  Moreover, the charcoal of this invention contains what carbonized industrial waste. The charcoal can be partly or wholly composed of carbonized industrial waste. Examples of industrial waste include livestock manure, rice husk, charcoal, vegetation, and food. However, industrial waste containing toxic substances such as heavy metals contaminates the soil and is not preferable as the charcoal of the solidifying material of the present invention.

  The method for producing a solidified soil according to the present invention comprises 0.5 to 10 parts by weight of charcoal with respect to 100 parts by weight of a composition comprising light burned magnesia, other fertilizers other than light burned magnesia, and an alkali neutralizer. The solidifying material of the present invention is added to the soil and stirred. Light solid magnesia, other fertilizers other than light calcined magnesia, and solidified material containing 0.5 to 10 parts by weight of charcoal with respect to 100 parts by weight of the composition containing an alkali neutralizer, obtain a strong soil solidification effect. be able to. When charcoal is 0.5 parts by weight or less, the effect of charcoal is weak, and when charcoal is 10 parts by weight or more, the soil solidification effect is weakened and is not suitable as a soil solidifying material. Preferably, 3 to 7 parts by weight of charcoal, more preferably about 5 parts by weight of charcoal is included with respect to 100 parts by weight of the composition comprising lightly burned magnesia, fertilizer other than lightly burned magnesia, and alkali neutralizer. Solidified material is particularly preferred.

  Applications of the solidifying material of the present invention include, but are not limited to, reinforcing slopes such as terraced rice fields, soil channels, and ponds. For example, it may be used to solidify soft soil and sludge such as residential land, parks, and promenades.

  Moreover, the soil solidified material manufactured with the manufacturing method of the soil solidified material of this invention can be carried out according to the objective. For example, using a solidifying material, soil generated by civil engineering work, corrosive soil, or the like may be solidified and then carried out. These exported soil solidified materials include road roadbed embankments, backfilling of structures, road road embankments, road slopes and road median strip materials, river bank embankment materials, etc. It can be reused appropriately and suitably for applications such as soil improvement soil for building land, parks and green spaces, soil for sports ground, cultivated soil for vegetation, beach sabo forest zone and desertification zone .

  EXAMPLES Hereinafter, although an Example of this invention is given and this invention is demonstrated in detail, this invention is not limited to the following example.

  43.9 parts by weight of light calcined magnesia, 56.1 parts by weight of hemihydrate gypsum, 97.5 parts by weight of calcined dust, 31.7 parts by weight of dredged sand, 3.66 of anionic polyacrylamide as a polymer flocculant A powdery mixture in which 10 parts by weight of 10 parts by weight of lime superphosphate was blended was designated as Composition A containing light-burned magnesia. Next, 5 parts by weight of charcoal was blended per 100 parts by weight of Composition A containing light-burned magnesia to obtain solidified material A. Wood was steamed and powdered to make charcoal.

  30 parts by weight of solidified material A, 100 parts by weight of Kanto loam (water content 42%), and 50 parts by weight of water were stirred with a Hobart mixer for 3 minutes to obtain a solidified soil. When it was allowed to stand indoors for 1 day, the solidified soil was almost solidified, and when it was left indoors for 3 days, it was completely solidified. When 10 g of solidified soil was immersed in 100 ml of pure water and the pH was measured, it was about 10.

  27 parts by weight of potassium dihydrogen phosphate and 5 parts by weight of charcoal as an alkali neutralizer were blended with 100 parts by weight of composition A containing light-burned magnesia of Example 1 to obtain solidified material B which is a powdery mixture.

  Next, 30 parts by weight of solidifying material B, 100 parts by weight of Kanto loam (water content 42%), and 50 parts by weight of water were stirred for 3 minutes with a Hobart mixer to obtain a solidified soil. When it was allowed to stand indoors for 1 day, the solidified soil was almost solidified, and when it was left indoors for 3 days, it was completely solidified. When 10 g of solidified soil was immersed in 100 ml of pure water and pH was measured, it was about 8. Compared with Example 1, the pH was close to neutral, and the effect of the alkali neutralizer potassium dihydrogen phosphate was confirmed.

  5 parts by weight of charcoal is blended with 100 parts by weight of a composition comprising 50 parts by weight of light-burned magnesia, 47 parts by weight of cinnabar and 3 parts by weight of lime superphosphate, and solidified material C, which is a powdery mixture Got. Wood was steamed and powdered to make charcoal.

  15 parts by weight of the obtained solidified material C and 100 parts by weight of paddy soil (water content ratio 61%) were mixed and stirred, and allowed to stand for 1 day to obtain solidified soil. Then, the solidified soil material was spread in a pot, a houseplant was planted, and the growth state was observed (test area). As a control, the state of growth of foliage plants in pots laid only with paddy soil without using solidifying material C was also observed (control group). As a result, the plants in the test group had strong green leaves and were shiny compared to the control group, and grew into healthy plants. It is thought that the addition of the solidifying material C improved the soil quality in the test area and changed to vigorous soil.

  15 parts by weight of the alkali neutralizer potassium dihydrogen phosphate and 5 parts per 100 parts by weight of a composition comprising 50 parts by weight of light-burned magnesia, 47 parts by weight of cinnabar and 3 parts by weight of lime superphosphate The charcoal of a weight part was mix | blended and the solidification material D was obtained. Wood was steamed and powdered to make charcoal.

  20 parts by weight of the obtained solidified material D and 100 parts by weight of field soil (water content ratio 55%) mixed with cow manure were mixed and stirred, and allowed to stand for 1 day to obtain solidified soil. The strength of the solidified soil material was hard. Moreover, the unpleasant odor of manure was suppressed by the deodorizing action of charcoal.

  5 parts by weight of charcoal is blended per 100 parts by weight of a composition comprising 77 parts by weight of light-burned magnesia, 18 parts by weight of potassium dihydrogen phosphate as an alkali neutralizer and 5 parts by weight of lime superphosphate. Solidified material E was obtained. Wood was steamed and powdered to make charcoal. 15 parts by weight of solidifying material E was added to 100 parts by weight of paddy soil (water content ratio 61%) and stirred. When the stirred mixture was carried out to other places and allowed to stand, it was almost completely solidified after 18 hours. Thereafter, the solidified material was spread on the ground and rolled. Two days later, the rolled portion became hard. From this, it was found that the soil solidified material can be suitably used as an earth material for a sports ground, for example.

The solidification material E of Example 5 was added to the soil, and the effect on the crop leek was examined. As a comparative example, soil to which the solidifying material E was not added was used. As a result, what grew on the soil to which the solidifying material E of the present invention was added was about 1.2 to 1.4 times larger than that grown on the soil without addition. From this, it was found that the soil using the solidifying material of the present invention has an excellent plant growing effect.

Claims (8)

A solidifying material for solidifying soil, comprising light burned magnesia, fertilizer other than light burned magnesia, and charcoal. In the solidification material which solidifies the soil, 0.5 to 10 parts by weight of charcoal is included with respect to 100 parts by weight of the composition containing light burned magnesia, other fertilizers other than light burned magnesia, and an alkali neutralizer. Characterized solidification material. The solidified material according to claim 1 or 2, wherein the charcoal includes carbonized industrial waste. The solidified material according to claim 3, wherein the industrial waste is any one or more of livestock manure, rice husk, wood chips, vegetation and food. The solidified material according to any one of claims 1 to 4, wherein the charcoal is pulverized coal. A method for producing a solidified soil, comprising adding the solidified material according to any one of claims 1 to 5 to the soil and stirring the soil. A soil solidified material obtained by the method for producing a solidified soil according to claim 6. Solidifying material for solidifying soil, which contains charcoal as a constituent component and rich in fertilizer components, improves soft soil and gives vitality to soil, and is suitable for crop production and soil greening .