JP4619837B2 - Solidified material, solidified body using the same, and soil improvement method - Google Patents
Solidified material, solidified body using the same, and soil improvement method Download PDFInfo
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- JP4619837B2 JP4619837B2 JP2005071419A JP2005071419A JP4619837B2 JP 4619837 B2 JP4619837 B2 JP 4619837B2 JP 2005071419 A JP2005071419 A JP 2005071419A JP 2005071419 A JP2005071419 A JP 2005071419A JP 4619837 B2 JP4619837 B2 JP 4619837B2
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Description
本発明は、ヘドロや建設汚泥などに使用する固化材およびそれを用いた固化体ならびに土壌改良方法に関するものである。 The present invention relates to a solidifying material used for sludge, construction sludge, and the like, a solidified body using the same, and a soil improvement method.
従来、建設汚泥を固化するための固化材は、セメントあるいは石灰を主体とし、用途によっては高炉水砕スラグや石膏類が混合されている。しかしながら、これらの物質はヘドロや汚泥中の水分と反応して強いアルカリ性を呈し、固化後の処理物は植物の生育には適さない。また、セメント系物質は有機質土壌や酸性土壌では水和反応が遅延し、強度発現性が低下しやすいという課題があった。そのため、固化後の土壌が中性領域でかつ酸性雰囲気下でも安定して硬化する物質として半水せっこうを主体とする固化材が検討されている（特許文献１）。
ヘドロや建設汚泥などは含水比が高い場合が多く、半水せっこうをはじめとするせっこう類では中性領域での固化が可能となるものの、非常に多くの固化材を使用する必要がある点、また、固化体の耐水性が低いため雨水によって再び泥濘化しやすい点につき鋭意検討した結果、特定の固化材を使用することにより可能であることを見いだし、本発明を完成させるに至った。 Sludge and construction sludge often have a high water content ratio, and gypsum such as gypsum can be solidified in a neutral region, but it is necessary to use a very large amount of solidifying material. In addition, as a result of diligent investigation on the point that the solidified body is low in water resistance and is prone to muddying again with rainwater, the inventors have found that this is possible by using a specific solidified material, and have completed the present invention.
すなわち、本発明は、アニオン変性ポリビニルアルコール、ポリアミドポリアミンおよび半水せっこうを含有してなる固化材であり、前記固化材を含有したｐＨが６〜９の固化体であり、前記固化材を使用する土壌改良方法である。 That is, the present invention is a solidified material containing anion-modified polyvinyl alcohol, polyamide polyamine and hemihydrate gypsum, a solidified material containing the solidified material and having a pH of 6 to 9, and using the solidified material. It is a soil improvement method.
本発明の固化材およびそれを用いた固化体ならびに土壌改良方法は、比較的高い含水比のヘドロや建設汚泥などであっても固化することが可能となり、さらに、固化体が耐水性に優れることから再泥濘化し難いなどの効果を奏する。 The solidified material of the present invention, the solidified body using the solidified material, and the soil improvement method can be solidified even with sludge or construction sludge having a relatively high water content, and the solidified body has excellent water resistance. It has the effect that it is difficult to re-mud.
本発明で使用するアニオン変性ポリビニルアルコールは、ポリビニルアルコールの水酸基の一部がカルボキシル基やスルホン基などで変性され、アニオン性を示すものである。特に平均重合度が500〜3000、鹸化度が80mol%以上のものが、固化対象物質との混合性、水への溶解性、固化後の強度や弾性、保水性の観点から好ましい。アニオン変性度は特に規定されるもではないが、通常0.5〜10mol%程度が使い易い。0.5mol%未満や10mol%を超えると固化体の強度が不足する場合がある。なお、本発明では、アニオン変性ポリビニルアルコールを水溶液の状態で配合する。また、アニオン変性ポリビニルアルコールの固形分濃度は、通常1〜20質量%程度が好ましく、1質量%未満では強度が不足する場合があり、20質量%以上では粘性が高くなりすぎて固化対象物と混合し難くなる場合がある。 The anion-modified polyvinyl alcohol used in the present invention has an anionic property by partially modifying the hydroxyl group of polyvinyl alcohol with a carboxyl group or a sulfone group. In particular, those having an average degree of polymerization of 500 to 3000 and a saponification degree of 80 mol% or more are preferred from the viewpoints of miscibility with the substance to be solidified, solubility in water, strength and elasticity after solidification, and water retention. The degree of anion modification is not particularly specified, but usually about 0.5 to 10 mol% is easy to use. If it is less than 0.5 mol% or exceeds 10 mol%, the strength of the solidified product may be insufficient. In the present invention, anion-modified polyvinyl alcohol is blended in the form of an aqueous solution. In addition, the solid content concentration of the anion-modified polyvinyl alcohol is usually preferably about 1 to 20% by mass, and if it is less than 1% by mass, the strength may be insufficient, and if it is 20% by mass or more, the viscosity becomes too high and the solidified object. Mixing may be difficult.
本発明で使用するポリアミドポリアミンは、特に限定されるものではなく、一般に市販されているものを使用することができる。例えば、旭電化工業株式会社製「アデカグランマイド650」などが挙げられる。また、本発明ではポリアミドポリアミンを溶剤に溶解した状態で使用する。 The polyamide polyamine used in the present invention is not particularly limited, and those generally available on the market can be used. Examples thereof include “Adeka Grandmide 650” manufactured by Asahi Denka Kogyo Co., Ltd. In the present invention, the polyamide polyamine is used in a state dissolved in a solvent.
本発明で使用する半水せっこう（CaSO4・1/2H2O）は、特に限定されるものではなく、通常、土壌固化に用いられるものであれば良い。半水せっこうは、特に初期の強度発現性の観点から好ましい。半水せっこうの粉末度は、特に限定されるものではないが、固化対象物質への分散性や土壌との反応性の観点からブレーン比表面積で2000〜8000cm2/gが好ましく、4000〜6000 cm2/gがより好ましい。2000cm2/g未満では分散性や土壌との反応性が不足し固化後の強度が得られ難い場合があり、8000cm2/gを超えると不経済になる場合がある。 The half-water gypsum (CaSO 4 · 1 / 2H 2 O) used in the present invention is not particularly limited and may be any one that is usually used for soil solidification. The half-water gypsum is particularly preferable from the viewpoint of initial strength development. The fineness of hemihydrate gypsum is not particularly limited, but is preferably 2000 to 8000 cm 2 / g in terms of Blaine specific surface area from the viewpoint of dispersibility in the substance to be solidified and reactivity with soil, 4000 to 6000 cm 2 / g is more preferable. If it is less than 2000 cm 2 / g, dispersibility and reactivity with soil may be insufficient, and strength after solidification may be difficult to obtain, and if it exceeds 8000 cm 2 / g, it may be uneconomical.
アニオン変性ポリビニルアルコール水溶液、ポリアミドポリアミン溶液および半水せっこうの配合比率は、特に限定されるものではないが、通常、半水せっこう100質量部に対し、アニオン変性ポリビニルアルコールが固形分で1〜20質量部、ポリアミドポリアミンが固形分で1〜20質量部が好ましく、アニオン変性ポリビニルアルコールが固形分で5〜15質量部、ポリアミドポリアミンが固形分で5〜15質量部がより好ましい。前記範囲外では固化対象物質との混合性、固化後の強度、固化体の耐水性が低下する場合がある。 The blending ratio of the anion-modified polyvinyl alcohol aqueous solution, the polyamide polyamine solution and the half-water gypsum is not particularly limited, but is usually 1 to 100 parts by weight of the anion-modified polyvinyl alcohol with respect to 100 parts by weight of the half-water gypsum. 20 to 15 parts by mass, preferably 1 to 20 parts by mass of polyamide polyamine in solid content, more preferably 5 to 15 parts by mass in solid content of anion-modified polyvinyl alcohol, and more preferably 5 to 15 parts by mass in solid content of polyamide polyamine. Outside the above range, the mixability with the substance to be solidified, the strength after solidification, and the water resistance of the solidified product may decrease.
本発明の固化材のヘドロや建設汚泥などに対する使用量は、特に限定されるものではないが、周辺の動植物への影響などを考慮すると、固化体のｐＨが６〜９の範囲となるようにすることが好ましい。 Although the usage-amount with respect to sludge, construction sludge, etc. of the solidification material of this invention is not specifically limited, When the influence on surrounding animals and plants etc. is considered, the pH of a solidified body will be the range of 6-9. It is preferable to do.
以下、実施例で詳細に説明する。 Examples will be described in detail below.
「実施例１」
自然含水比20質量%のシルト質粘土1000質量部に対し、表１に示す量の半水せっこうと、重合度1700、鹸化度90.0mol%、カルボキシル基変性ポリビニルアルコール水溶液（固形分濃度10質量%）と、ポリアミドポリアミン溶液（固形分濃度95質量%）を加えた。充分に混合した後40×40×160ｍｍの型枠に詰め、ランマーを用いて締め固めた後、20℃湿度80%RH環境下で7日間養生した。その後、型枠から脱型し、固化体の圧縮強度とｐＨ、耐水性を評価した。結果を表１に示す。なお、半水せっこうだけを配合した場合、ポリアミドポリアミンを加えなかった場合、半水せっこうと高炉水砕スラグやフライアッシュを組み合わせた場合を比較例とした。表１に結果を併記する。
"Example 1"
With respect to 1000 parts by mass of silty clay with a natural water content of 20% by mass, the amount of hemihydrate gypsum shown in Table 1, polymerization degree 1700, saponification degree 90.0 mol%, carboxyl group-modified polyvinyl alcohol aqueous solution (solid content concentration 10 mass) %) And a polyamide polyamine solution (solid content concentration: 95% by mass). After thorough mixing, it was packed in a 40 × 40 × 160 mm mold, compacted with a rammer, and then cured for 7 days in an environment of 20 ° C. and humidity of 80% RH. Thereafter, the mold was removed from the mold, and the compression strength and pH and water resistance of the solidified body were evaluated. The results are shown in Table 1. In addition, the case where only a half water gypsum was mix | blended, the case where a polyamide polyamine was not added, and the case where a half water gypsum and blast-furnace granulated slag and fly ash were combined were made into the comparative example. Table 1 also shows the results.
「使用材料」
アニオン変性ポリビニルアルコール：重合度1700、鹸化度90.0mol%、カルボキシル基変性、変性度2.0mol%
ポリアミドポリアミン：旭電化社製、「アデカグランマイド650」
半水せっこう：ブレーン比表面積6000cm2/g、市販品
高炉水砕スラグ：新日鉄高炉セメント社製「エスメント」、ブレーン比表面積6000cm2/g
フライアッシュ：フライアッシュＩＩ種、ブレーン比表面積3000cm2/g
"Materials used"
Anion-modified polyvinyl alcohol: polymerization degree 1700, saponification degree 90.0 mol%, carboxyl group modification, modification degree 2.0 mol%
Polyamide polyamine: “Adeka Grandmide 650” manufactured by Asahi Denka Co., Ltd.
Semi-water gypsum: Brain specific surface area 6000 cm 2 / g, commercial blast furnace granulated slag: “Esment” made by Nippon Steel Blast Furnace Cement, Brain specific surface area 6000 cm 2 / g
Fly ash: fly ash type II, brain specific surface area 3000cm 2 / g
「測定方法」
圧縮強度：JIS R 5201に準拠
ｐＨ：作製した供試体50gを500mlの純水に6hr浸漬し、上澄みのｐＨをｐＨ電極で測定
耐水性：上記のｐＨ測定溶液のにごり具合を目視で判定。濁っている：×、澄んでいる：○
"Measuring method"
Compressive strength: Conforms to JIS R 5201 pH: 50 g of the prepared specimen is immersed in 500 ml of pure water for 6 hours, and the pH of the supernatant is measured with a pH electrode. Water resistance: The degree of dustiness of the above pH measurement solution is visually determined. Cloudy: x, clear: ○
表１に示すように、本発明の固化材は、固化体の含水比が高くても強度が高く、ｐＨも中性領域であることが分かる。 As shown in Table 1, it can be seen that the solidified material of the present invention has high strength and pH in a neutral region even if the moisture content of the solidified body is high.
「実施例２」
アニオン変性ポリビニルアルコールの水溶液固形分濃度、重合度、鹸化度を表２に示すように変化させ、半水せっこう１００質量部に対し各アニオン変性ポリビニルアルコール水溶液１００質量部を加えたこと以外は実施例１と同様に行った。表２に結果を併記する。
"Example 2"
This was carried out except that the solid content concentration, polymerization degree, and saponification degree of the anion-modified polyvinyl alcohol were changed as shown in Table 2, and 100 parts by mass of each anion-modified polyvinyl alcohol solution was added to 100 parts by mass of gypsum hemihydrate. Performed as in Example 1. Table 2 also shows the results.
表２に示すように、本発明の固化材は、固化体の含水比が高くても強度が高く、ｐＨも中性領域であることが分かる。 As shown in Table 2, it can be seen that the solidified material of the present invention has high strength and pH in a neutral region even if the moisture content of the solidified body is high.
「実施例３」
半水せっこう、アニオン変性ポリビニルアルコール、ポリアミドポリアミンの添加量を表３に示すように変化させたこと以外は実施例１と同様に行った。表３に結果を併記する。
"Example 3"
The same procedure as in Example 1 was carried out except that the amounts of hemihydrate gypsum, anion-modified polyvinyl alcohol, and polyamide polyamine were changed as shown in Table 3. Table 3 shows the results.
表３に示すように、本発明の固化材は、固化体の含水比が高くても強度が高く、pHも中性領域であることが分かる。 As shown in Table 3, it can be seen that the solidified material of the present invention has high strength and pH in a neutral region even if the water content of the solidified body is high.
本発明の固化材およびそれを用いた固化体ならびに土壌改良方法は、比較的高い含水比のヘドロや建設汚泥などであっても中性領域で固化することが可能となり、さらに、固化体が耐水性に優れることから再泥濘化し難いなどの効果を奏するので、土木分野などで幅広く適用できる。 The solidified material of the present invention, the solidified body using the solidified material, and the soil improvement method can be solidified in a neutral region even if the sludge or construction sludge has a relatively high water content, and the solidified body is water resistant. Because it has excellent properties, it can be applied to a wide range of applications in the civil engineering field.
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| JP4619837B2 true JP4619837B2 (en) | 2011-01-26 |
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| US10550038B2 (en) * | 2015-12-09 | 2020-02-04 | The Nippon Synthetic Chemical Industry Co., Ltd. | Cement admixture |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044099A (en) * | 1983-08-22 | 1985-03-08 | Sumitomo Chem Co Ltd | Sludge dehydrating method |
| JPH0238615A (en) * | 1988-07-29 | 1990-02-08 | Kurita Water Ind Ltd | Method for improving quality of moist surplus soil |
| JPH08311446A (en) * | 1995-05-16 | 1996-11-26 | Mitsubishi Materials Corp | Solidifier for soil conditioning |
| JPH09125060A (en) * | 1995-11-02 | 1997-05-13 | Terabondo:Kk | Water-containing soil conditioner composed of gypsum hemihydrate |
| JPH10273670A (en) * | 1997-03-28 | 1998-10-13 | Ube Ind Ltd | Solidifying material for hydrous soil and modification of hydrous soil using the same |
| JP2004002174A (en) * | 2002-04-25 | 2004-01-08 | Nippon Shokubai Co Ltd | Admixture for cement and its manufacturing method |
| JP2004244625A (en) * | 2003-01-24 | 2004-09-02 | Nippon Shokubai Co Ltd | Agent for treating wet soil and method for granulating wet soil |
| JP2005060467A (en) * | 2003-08-08 | 2005-03-10 | Denki Kagaku Kogyo Kk | Gel composition |
| JP2005113046A (en) * | 2003-10-09 | 2005-04-28 | Denki Kagaku Kogyo Kk | Grout |
| JP2005133064A (en) * | 2003-10-09 | 2005-05-26 | Denki Kagaku Kogyo Kk | Admixture for soil pavement and soil pavement using the same |
-
2005
- 2005-03-14 JP JP2005071419A patent/JP4619837B2/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044099A (en) * | 1983-08-22 | 1985-03-08 | Sumitomo Chem Co Ltd | Sludge dehydrating method |
| JPH0238615A (en) * | 1988-07-29 | 1990-02-08 | Kurita Water Ind Ltd | Method for improving quality of moist surplus soil |
| JPH08311446A (en) * | 1995-05-16 | 1996-11-26 | Mitsubishi Materials Corp | Solidifier for soil conditioning |
| JPH09125060A (en) * | 1995-11-02 | 1997-05-13 | Terabondo:Kk | Water-containing soil conditioner composed of gypsum hemihydrate |
| JPH10273670A (en) * | 1997-03-28 | 1998-10-13 | Ube Ind Ltd | Solidifying material for hydrous soil and modification of hydrous soil using the same |
| JP2004002174A (en) * | 2002-04-25 | 2004-01-08 | Nippon Shokubai Co Ltd | Admixture for cement and its manufacturing method |
| JP2004244625A (en) * | 2003-01-24 | 2004-09-02 | Nippon Shokubai Co Ltd | Agent for treating wet soil and method for granulating wet soil |
| JP2005060467A (en) * | 2003-08-08 | 2005-03-10 | Denki Kagaku Kogyo Kk | Gel composition |
| JP2005113046A (en) * | 2003-10-09 | 2005-04-28 | Denki Kagaku Kogyo Kk | Grout |
| JP2005133064A (en) * | 2003-10-09 | 2005-05-26 | Denki Kagaku Kogyo Kk | Admixture for soil pavement and soil pavement using the same |
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