JP2010053327A - Solidifying material for oil-contaminated soil, high organic volcanic ash, and oil-containing waste fluid - Google Patents
Solidifying material for oil-contaminated soil, high organic volcanic ash, and oil-containing waste fluid Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 96
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- 239000004568 cement Substances 0.000 claims abstract description 31
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
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- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 5
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- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
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- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
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- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
本発明は油汚染土（例えば工場跡地やガソリンスタンド跡地のような油で汚染された土地等）あるいは高有機質火山灰（例えば阿蘇の黒ボクや赤ボクあるいは関東ローム層等）並びに産業廃棄物処理の過程で生じる含油廃液を固化するのに適した固化材に関する。 The present invention is applicable to oil-contaminated soil (for example, land contaminated with oil such as a factory site or a gas station site) or high organic volcanic ash (for example, Aso's black or red or Kanto loam layer) and industrial waste treatment. The present invention relates to a solidifying material suitable for solidifying oil-containing waste liquid generated in the process.
従来の技術による固化材は処理土の強度発現を良好にし、安価に製造可能なセメント系固化材が提案されているが、この固化材は主材をポルトランドセメントとし、副材として石膏及び硫酸塩を添加して、処理土の強度発現を良好にするものである。 A cement-based solidification material has been proposed as a solidification material according to the prior art, which improves the strength of the treated soil and can be manufactured at low cost. This solidification material is mainly made of Portland cement and gypsum and sulfate as secondary materials. Is added to improve the strength of the treated soil.
現在、一般的に流通しているセメント系固化材は一般的な軟弱土壌（例えば、砂質土、あるいは粘土やシルト質土よりなる）を固化するために開発されたものであり、その効果はセメント系地盤改良用固化材として多くの施工実績が上がっており、その効果も実証されている。しかし、油汚染土や高有機物含有土壌（例えば、阿蘇の黒ボクや赤ボク土、あるいは有明粘土、関東ローム層）あるいは含油廃液ではセメント系固化材では固化が不十分であり、極端には固化不能であり、表層土を除去して、良質の土に入れ替えているケースが多い。また含油廃液では焼却処分をするケースがほとんどである。この場合、置換費用と土砂の処分費用また含油廃液では焼却費用がかかり、建設コスト及び処分費用が大きくなることが欠点である。 Currently, the cement-based solidifying material that is generally distributed was developed to solidify general soft soil (for example, sandy soil, or made of clay or silty soil). Many construction results have been achieved as cement-based ground improvement solidifying materials, and their effects have been proven. However, in oil-contaminated soil and soil containing high organic matter (for example, Aso's black and red soil, Ariake clay, Kanto loam layer) or oil-containing waste liquid, cement-based solidified material is insufficiently solidified, and it is extremely solidified. In many cases, the surface soil is removed and replaced with good quality soil. In most cases, the oil-containing waste liquid is incinerated. In this case, the replacement cost, the disposal cost of earth and sand, and the oil-containing waste liquid are incinerated, and the construction cost and the disposal cost increase.
上記固化材の問題点としては、固化材の主材がポルトランドセメントであり、副材として石膏あるいは硫酸塩を少量添加したセメント系固化材を用いた場合、油汚染土や高有機質火山灰並びに含油廃液への固化効果を発揮するためには添加量を多くする必要があり、コストアップになる。また、被処理物中の水とセメントが水和反応して被処理物の固化が行われるが、油、有機質が存在した場合、この水和反応が阻害される。また、ポルトランドセメントはセメント製造中に、原材料の石灰石を分解する時、多量の二酸化炭素を排出するために環境負荷が大きく地球温暖化に悪影響を与える。
上記発明による固化材は有機酸を吸着する吸着材を使用することなく、処理土の強度発現を良好とし、安価に製造可能なセメント系固化材の製造方法が述べられているが、この固化材は母材をポルトランドセメントとし、石膏あるいは硫酸塩を添加して、セメントの水和を阻害する有機酸の作用を抑制し、処理土の強度発現を良好にするものである。The problem with the above solidified materials is that when the main material of the solidified material is Portland cement and a cement-based solidified material to which a small amount of gypsum or sulfate is added as a secondary material, oil-contaminated soil, highly organic volcanic ash, and oil-containing waste liquid It is necessary to increase the amount of addition in order to exert a solidifying effect on the material, resulting in an increase in cost. In addition, water and cement in the object to be treated are hydrated to solidify the object to be treated. However, when oil or organic matter is present, this hydration reaction is inhibited. Portland cement emits a large amount of carbon dioxide when decomposing raw limestone during cement production, which has a large environmental impact and adversely affects global warming.
The solidifying material according to the invention is described as a method for producing a cement-based solidifying material that can be manufactured at low cost without using an adsorbent that adsorbs an organic acid, so that the strength of the treated soil is improved. Uses Portland cement as the base material, and gypsum or sulfate is added to suppress the action of organic acids that hinder the hydration of the cement, thereby improving the strength of the treated soil.
請求項１に記載の発明は、主材としてスラグを用い、副材としてアルカリ金属類化合物およびセメント類を配合したことを特徴とする油汚染土及び高有機質火山灰土及び含油廃液用固化材である。スラグを使用する目的は、高炉スラグなどは潜在水硬性を有しており、副材のアルカリ金属類の刺激により、強度発現効果を高め、副材のセメント類は、初期強度の発現性をもたらす。
上記スラグとして製鉄における高炉スラグなどの金属精錬スラグ、あるいは都市ゴミ溶融スラグを用い、その粒度（粒子の大きさ）として比表面積（ブレーン値）で１００から１０，０００ｃｍ２／ｇのスラグ微粉末が好適である。ここで１００ｃｍ２／ｇ未満では、スラグの活性が低く、強度の発現性に劣る。また、１０，０００ｃｍ２／ｇ以上では活性は高いが、微粉末の製造コストが高く、コストメリットに劣る。The invention described in claim 1 is a solidified material for oil-contaminated soil, highly organic volcanic ash soil, and oil-containing waste liquid, characterized in that slag is used as a main material and an alkali metal compound and cement are blended as sub-materials. . The purpose of using slag is that blast furnace slag, etc. has latent hydraulic properties, and the effect of strength development is enhanced by stimulation of the alkali metal of the secondary material, and the cement of the secondary material brings out the initial strength. .
As the slag, metal smelting slag such as blast furnace slag in iron making, or municipal waste molten slag is used, and as a particle size (particle size), a slag fine powder having a specific surface area (brain value) of 100 to 10,000 cm 2 / g is obtained. Is preferred. If it is less than 100 cm < 2 > / g here, the activity of slag is low and it is inferior to intensity | strength expression. Moreover, although activity is high at 10,000 cm < 2 > / g or more, the manufacturing cost of a fine powder is high and it is inferior to cost merit.
請求項２に記載の発明は、上記スラグ１００重量部に対し、上記アルカリ金属類化合物を３〜４０重量部、セメント類を１〜５０重量部配合したことを特徴とする請求項１記載の油汚染土用及び高有機質火山灰土用及び含油廃液用固化材である。ここでアルカリ金属類添加率が３重量部未満の場合は、スラグの活性化が不十分であり、強度の発現性が劣る。また、４０重量部以上の場合は副材のセメント類が瞬結する恐れがあること、及び製造コストが大幅にアップすることから望ましくない。また、セメント類は補助材であり、これを添加することにより高価なアルカリ金属類化合物の使用量を削減することが可能になりて、セメントクリンカー起源ではない水硬性粉体が得られ、この粉体を固化材の主成分として用いれば、油汚染土あるいは高有機質火山灰土を、十分な強度を有する硬化体に固化、１重量部〜５０重量部の範囲で使用することが望ましい。ここでセメント類の添加量が１重量部未満の場合はセメント類の水和効果が期待できず、５０重量部以上添加した場合は粘性の増加があり、土あるいは含油廃液との混合が困難になることから好ましくない。この粉体の使用温度領域は一般的に常温での使用であり、気温が低い場合は、普通ポルトランドセメントあるいは高炉セメントの添加量を増量する必要があり、冬季に使用する時は普通ポルトランドセメントあるいは高炉セメントの添加量は３０重量部以上の添加が望ましい。The invention according to claim 2 is characterized in that 3 to 40 parts by weight of the alkali metal compound and 1 to 50 parts by weight of cement are blended with 100 parts by weight of the slag. Solidified material for contaminated soil, high organic volcanic ash soil and oil-containing waste liquid. Here, when the alkali metal addition ratio is less than 3 parts by weight, the activation of the slag is insufficient, and the strength development is inferior. On the other hand, when the amount is 40 parts by weight or more, there is a possibility that the cement of the secondary material may be instantaneously set and the manufacturing cost is significantly increased, which is not desirable. In addition, cements are auxiliary materials, and by adding them, it becomes possible to reduce the amount of expensive alkali metal compounds used, and hydraulic powders not originating from cement clinker can be obtained. If the body is used as the main component of the solidifying material, it is desirable that oil-contaminated soil or highly organic volcanic ash soil be solidified into a hardened body having sufficient strength and used in the range of 1 to 50 parts by weight. Here, when the added amount of cement is less than 1 part by weight, the hydration effect of cement cannot be expected, and when added over 50 parts by weight, there is an increase in viscosity, making it difficult to mix with soil or oil-containing waste liquid. This is not preferable. The operating temperature range of this powder is generally used at room temperature. When the temperature is low, it is necessary to increase the amount of ordinary Portland cement or blast furnace cement added. The addition amount of blast furnace cement is desirably 30 parts by weight or more.
請求項３に記載の発明は、上記スラグとして高炉水砕スラグは固化性能に優れるとともに安価であり、入手が容易である。この高炉水砕スラグを用いることを特徴とする請求項１、２記載の汚染土及び高有機質火山灰土及び含油廃液用固化材である。 In the invention described in claim 3, blast furnace granulated slag as the slag is excellent in solidification performance and inexpensive, and is easily available. The blast furnace granulated slag is used as a solidified material for contaminated soil, highly organic volcanic ash soil and oil-containing waste liquid according to claim 1 or 2.
請求項４に記載の発明は、上記アルカリ金属類化合物としてメタ珪酸ソーダ、炭酸ソーダ、水ガラスは高炉水砕スラグの刺激作用が強く、強度発現性に優れている。これらのアルカリ金属化合物類から選ばれる１種あるいは２種以上を用いることを特徴とする請求項１〜３記載の汚染土及び高有機質火山灰土及び含油廃液用固化材である。 In the invention according to claim 4, sodium silicate, sodium carbonate, and water glass as the alkali metal compounds have a strong stimulating action of granulated blast furnace slag and are excellent in strength development. The contaminated soil, highly organic volcanic ash soil, and solidified material for oil-containing waste liquid according to claim 1, wherein one or two or more selected from these alkali metal compounds are used.
請求項５に記載の発明は、上記セメント類として普通ポルトランドセメント、高炉セメントから選ばれる１種または２種を用いることを特徴とする請求項１〜４記載の汚染土及び高有機質火山灰土及び含油廃液用固化材である。普通ポルトランドセメントは早期強度発現性に優れており、また高炉セメントは高炉水砕スラグを多く含んでいるため、アルカリ金属類の刺激を受けやすい。The invention according to claim 5 uses one or two kinds selected from ordinary Portland cement and blast furnace cement as the cement, and contaminated soil, highly organic volcanic ash soil and oil impregnation according to claims 1 to 4 Solidified material for waste liquid. Ordinary Portland cement is excellent in early strength development, and since blast furnace cement contains a large amount of granulated blast furnace slag, it is easily affected by alkali metals.
上記の問題点に対して、本発明によって、油汚染土あるいは高有機物含有土壌及び含油廃液に対して、十分な強度を有し、かつ油汚染土及び含油廃液から油の溶出のない硬化体となるように油汚染土あるいは高有機物含有土壌の早期強度発現が達成された。上記固化材は、ポルトランドセメントをほとんど使用しないで、高炉水砕スラグを主材とし、副材としてアルカリ金属類化合物及び高炉セメントを使用することで炭酸ガスの排出がほとんどなく、かつ強アルカリ雰囲気の中で有機物を分解し、油の分子鎖を切断することで固化効果を発現することを特徴とする。 To solve the above problems, according to the present invention, a hardened body having sufficient strength with respect to oil-contaminated soil or soil containing high organic matter and oil-containing waste liquid, and having no oil elution from the oil-contaminated soil and oil-containing waste liquid, Thus, early strength development of oil-contaminated soil or soil containing high organic matter was achieved. The above-mentioned solidifying material uses almost no Portland cement, blast furnace granulated slag as the main material, and alkali metal compounds and blast furnace cement as the secondary material, so there is almost no carbon dioxide emission and a strong alkaline atmosphere. It is characterized by a solidification effect by decomposing organic matter and breaking molecular chains of oil.
この固化材により従来は硬化が困難であった油汚染土あるいは高有機物含有土壌及び含油廃液の硬化体が早期に、十分な強度を有するようにすることが可能になり、現位置での油汚染土あるいは高有機物含有土壌及び含油廃液を十分な強度を有することができるように改良することが可能になる。また、土砂の置換及び含油廃液の処分なしに現位置での構造物建設が可能となり、建設コストを抑えることが可能となる、あるいは含油廃液の焼却処分が不要となる。 This solidifying material makes it possible to ensure that oil-contaminated soil or soil containing high organic matter and oil-containing waste liquid that has been difficult to harden have sufficient strength at an early stage, so that oil contamination at the current location can be prevented. It becomes possible to improve the soil or soil containing high organic matter and the oil-containing waste liquid so as to have sufficient strength. In addition, it is possible to construct a structure at the current position without replacing earth and sand and disposing of the oil-containing waste liquid, so that construction costs can be reduced, or incineration of the oil-containing waste liquid becomes unnecessary.
本発明はセメント系固化材、詳しくは主材であるセメントの水和を阻害する有機酸を多く含む土壌、油汚染土、及び含油廃液を固化可能なセメント系固化材に関する。本発明は油汚染土（例えば工場跡地やガソリンスタンド跡地のような油で汚染された土地、含油スラッジ等）あるいは高有機質の火山灰（例えば阿蘇の黒ボクや赤ボクあるいは関東ローム層等）及び含油廃液を固化するのに適した汚染土、高有機質火山灰及び含油廃液を固化する汚染土並びに含油廃液固化処理用固化材に関する。 The present invention relates to a cement-based solidified material, and more particularly, to a cement-based solidified material capable of solidifying a soil containing a large amount of an organic acid that inhibits hydration of cement as a main material, oil-contaminated soil, and oil-containing waste liquid. The present invention provides oil-contaminated soil (for example, land contaminated with oil such as a factory site or a gas station site, oil-containing sludge, etc.) or highly organic volcanic ash (for example, Aso's black, red, or Kanto loam layer) and oil-containing The present invention relates to a contaminated soil suitable for solidifying a waste liquid, highly organic volcanic ash, a contaminated soil for solidifying an oil-containing waste liquid, and a solidifying material for oil-containing waste liquid solidification treatment.
以下にこの発明を実施例に基づき説明する。 The present invention will be described below based on examples.
油汚染土に対する実施例を示す。
▲１▼使用汚染土： 海砂に機械油を５から２０重量部含む土 （５ｋｇ）
▲２▼使用固化材： 本発明材： 主材＝高炉水砕スラグ微粉末（５ｋｇ）
（ブレーン値＝４，０００ｃｍ２／ｇ）
副材１＝メタ珪酸ソーダ（スラグに対し３０重量部添加）
副材２＝高炉セメントＢ種（スラグに対し３重量部添加）
比較材：市販固化材（Ｕ社製）
主材＝普通ポルトランドセメント（８０重量部）
副材＝無水石膏 （２０重量部）
▲３▼評価方法：地盤工学会基準（ＪＧＳ０８１１）（安定処理土の突き固めによる供試 体作成方法）による一軸圧縮強度試験。
▲４▼結果を図１に示す。
▲５▼結果のコメント
汚染土中の油含有量が５重量部の時は市販の固化材でも一軸圧縮強度は発現するが、油含有量が１０重量部を超すと、一軸圧縮強度は急激に低下する。しかし本発明の固化材は油含有量が１５重量部を超しても十分な一軸圧縮強度を発揮することが分かった。特に、１５重量部の油含有量であっても固化可能であることは、一般的な油汚染土に対しても十分対応可能である。An example for oil-contaminated soil will be shown.
(1) Contaminated soil used: Soil containing 5 to 20 parts by weight of machine oil in sea sand (5kg)
(2) Solidifying material used: Material of the present invention: Main material = blast furnace granulated slag fine powder (5 kg)
(Brain value = 4,000 cm 2 / g)
Secondary material 1 = Sodium metasilicate (30 parts by weight added to slag)
Secondary material 2 = Blast furnace cement type B (3 parts by weight added to slag)
Comparative material: Commercial solidified material (manufactured by U company)
Main material = Ordinary Portland cement (80 parts by weight)
Secondary material = anhydrous gypsum (20 parts by weight)
(3) Evaluation method: Uniaxial compressive strength test according to the Japan Geotechnical Society standard (JGS0811) (Method for preparing specimens by tamping of stabilized soil).
(4) The results are shown in FIG.
(5) Comment on the result When the oil content in the contaminated soil is 5 parts by weight, the uniaxial compressive strength is exhibited even with a commercially available solidified material, but when the oil content exceeds 10 parts by weight, the uniaxial compressive strength rapidly increases. descend. However, it has been found that the solidified material of the present invention exhibits sufficient uniaxial compressive strength even when the oil content exceeds 15 parts by weight. In particular, the fact that it can be solidified even with an oil content of 15 parts by weight can sufficiently cope with general oil-contaminated soil.
高有機質火山灰土（主にフミン酸３０％）に対する実施例を示す。
▲１▼使用土： 阿蘇の黒ボク土（熊本県＝大津市産） （５ｋｇ）
湿潤密度□ｄ＝１．２９４ｋｇ／ｍ３、含水比＝５２．４％
▲２▼使用固化材： 本発明材： 主材＝高炉水砕スラグ微粉末（５ｋｇ）
（ブレーン値＝４，０００ｃｍ２／ｇ）
副材１＝メタ珪酸ソーダ（スラグに対し３０重量部添加）
副材２＝高炉セメントＢ種（スラグに対し３重量部添加）
比較材：市販固化材（Ｕ社製）
主材＝普通ポルトランドセメント（８０重量部）
副材＝無水石膏、硫酸塩（２０重量部）
▲３▼評価方法：地盤工学会基準（ＪＧＳ０８１１）（安定処理土の突き固めによる供 試体作成方法）による一軸圧縮強度試験。
▲４▼結果を図２に示す。
▲５▼結果のコメント
図２の結果より、従来セメント系固化材では固化困難であった高有機質火山灰土を所要の強度で固化できる。An example for highly organic volcanic ash soil (mainly 30% humic acid) is shown.
(1) Soil used: Aso's black soil (Kumamoto Prefecture = Otsu City) (5kg)
Wet density □ d = 1.294 kg / m 3 , moisture content = 52.4%
(2) Solidifying material used: Material of the present invention: Main material = blast furnace granulated slag fine powder (5 kg)
(Brain value = 4,000 cm 2 / g)
Secondary material 1 = Sodium metasilicate (30 parts by weight added to slag)
Secondary material 2 = Blast furnace cement type B (3 parts by weight added to slag)
Comparative material: Commercial solidified material (manufactured by U company)
Main material = Ordinary Portland cement (80 parts by weight)
Secondary material = anhydrous gypsum, sulfate (20 parts by weight)
(3) Evaluation method: A uniaxial compressive strength test according to the Japan Geotechnical Society standard (JGS0811) (a method for preparing a specimen by tamping a stabilized soil).
(4) The results are shown in FIG.
(5) Comment on the results From the results shown in FIG. 2, highly organic volcanic ash soil, which was difficult to solidify with conventional cement-based solidified materials, can be solidified with the required strength.
含油廃液に対する実施例を示す。
▲１▼使用廃液：含油スラッジ処理後に発生する含油廃液（油分１５％）。
▲２▼使用固化材： 本発明材： 主材＝高炉水砕スラグ微粉末（５ｋｇ）
（ブレーン値＝４，０００ｃｍ２／ｇ）
副材１＝メタ珪酸ソーダ（スラグに対し３０重量部添加）
副材２＝高炉セメントＢ種（スラグに対し３重量部添加）
比較材：普通ポルトランドセメント（５ｋｇ）
▲３▼評価方法：目視（顆粒状になっていることで判断）。
▲４▼結果を表１に示す。
表１に示すように比較材では処理後にてもゾル状の液体状を呈していたのに対し、含油廃液に本発明の固化材を含油廃液：固化材＝１：１．２５で混合すると所定の砂状になった。The Example with respect to an oil-containing waste liquid is shown.
(1) Used waste liquid: Oil-containing waste liquid (oil content 15%) generated after oil-containing sludge treatment.
(2) Solidifying material used: Material of the present invention: Main material = blast furnace granulated slag fine powder (5 kg)
(Brain value = 4,000 cm 2 / g)
Secondary material 1 = Sodium metasilicate (30 parts by weight added to slag)
Secondary material 2 = Blast furnace cement type B (3 parts by weight added to slag)
Comparative material: Ordinary Portland cement (5kg)
(3) Evaluation method: Visual (judged by being granular).
(4) The results are shown in Table 1.
また、本発明に係る油汚染土あるいは高有機質火山灰土用及び含油廃液用固化材の製造方法は、金属精錬水砕スラグあるいは都市ごみ溶融水砕スラグを破砕機で微粉砕した、アルカリ金属類を微粉末にオムニミキサーあるいは生コン輸送用トラックアジテーター車で混合して均一な粉体を製造することを特徴とする。 In addition, the method for producing a solidified material for oil-contaminated soil or highly organic volcanic ash soil and oil-containing waste liquid according to the present invention is obtained by pulverizing metal smelted granulated slag or municipal waste molten granulated slag with a crusher. The fine powder is mixed with an omni mixer or a truck agitator for transporting ready-mixed concrete to produce a uniform powder.
＜油汚染土あるいは高有機質火山灰の封じ込め方法＞
次に、本発明に係る油汚染土あるいは高有機質火山灰の封じ込め方法の好適な実施形態について説明する。油で汚染された汚染土から油の溶出を防止するあるいは高有機質火山灰土を固化するためには、汚染土１００ｋｇ当たり上記の固化材を５０〜１００ｋｇ混合、好ましくは５０〜９０ｋｇの範囲で、目標強度、処理コスト等を考慮して混合する。これにより既存のセメント系固化材では処理困難であった油汚染士あるいは高有機質火山灰の室内配合試験等を行って、目標強度を確認してから適正な固化材添加量を選定するのが好ましい。なお、原土の含水比は３０〜４０％程度が最適の範囲であり、含水比が３０％以下の時は、固化材の十分な水和を確保するために、散水等で加水する必要がある。<Containment method of oil-contaminated soil or highly organic volcanic ash>
Next, a preferred embodiment of a method for containing oil-contaminated soil or highly organic volcanic ash according to the present invention will be described. In order to prevent elution of oil from contaminated soil contaminated with oil or to solidify highly organic volcanic ash soil, 50 to 100 kg of the above solidified material per 100 kg of contaminated soil, preferably in the range of 50 to 90 kg, the target Mix in consideration of strength, processing cost, etc. Thus, it is preferable to select an appropriate amount of solidification material after confirming the target strength by conducting an indoor blending test of oil pollutants or highly organic volcanic ash, which has been difficult to treat with existing cement-based solidification materials. In addition, the water content ratio of the raw soil is about 30 to 40%, and when the water content ratio is 30% or less, it is necessary to add water with watering or the like to ensure sufficient hydration of the solidified material. is there.
油汚染土あるいは高有機質火山灰土及び含油廃液用固化材を使用して、油汚染土あるいは高有機質火山灰土の改良及び含油廃液の処理を行うに当たっては、含水土に余分な水を加えないようにするため、油汚染土あるいは高有機質火山灰土用固化材を粉末状態にして混合・攪拌するのが望ましい、あるいは含油廃液に粉体で混合することが望ましい。その際、一般に行われている改良プラントを用いて混合するプラント混合法やバックホウやスタビライザー等を用いる方法が効果的に適用できる。また状況に応じて予めスラリー状態にした油汚染土あるいは高有機質火山灰土用あるいは含油廃液用固化材を含水土あるいは含油廃液に混合することも可能である。 When using oil-contaminated soil or highly organic volcanic ash soil and solidified material for oil-containing waste liquid, do not add excess water to the water-containing soil when improving oil-contaminated soil or highly organic volcanic ash soil and treating oil-containing waste liquid. Therefore, it is desirable to mix and stir the oil-contaminated soil or the solidified material for highly organic volcanic ash soil in a powder state, or to mix it with the oil-containing waste liquid as a powder. In that case, the plant mixing method generally mixed using the improved plant and the method using a backhoe, a stabilizer, etc. can be applied effectively. Depending on the situation, it is also possible to mix the oil-contaminated soil or the solidified material for highly organic volcanic ash soil or oil-containing waste liquid into the water-containing soil or oil-containing waste liquid in a slurry state.
Claims (5)
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| JP2008251621A JP2010053327A (en) | 2008-08-29 | 2008-08-29 | Solidifying material for oil-contaminated soil, high organic volcanic ash, and oil-containing waste fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2494137C2 (en) * | 2011-08-19 | 2013-09-27 | Анара Абильжановна Сарсенова | Ameliorative preparation for increasing soil fertility |
| JP2015030740A (en) * | 2013-07-31 | 2015-02-16 | 昭和電工株式会社 | Aqueous resin emulsion for plastic coating |
-
2008
- 2008-08-29 JP JP2008251621A patent/JP2010053327A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2494137C2 (en) * | 2011-08-19 | 2013-09-27 | Анара Абильжановна Сарсенова | Ameliorative preparation for increasing soil fertility |
| JP2015030740A (en) * | 2013-07-31 | 2015-02-16 | 昭和電工株式会社 | Aqueous resin emulsion for plastic coating |
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