JPS63150374A - Method of treating waste soil containing highly water-absorptive resin - Google Patents
Method of treating waste soil containing highly water-absorptive resinInfo
- Publication number
- JPS63150374A JPS63150374A JP29657886A JP29657886A JPS63150374A JP S63150374 A JPS63150374 A JP S63150374A JP 29657886 A JP29657886 A JP 29657886A JP 29657886 A JP29657886 A JP 29657886A JP S63150374 A JPS63150374 A JP S63150374A
- Authority
- JP
- Japan
- Prior art keywords
- waste soil
- water
- polyvalent metal
- resin
- waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002689 soil Substances 0.000 title claims abstract description 44
- 239000011347 resin Substances 0.000 title claims abstract description 38
- 229920005989 resin Polymers 0.000 title claims abstract description 38
- 239000002699 waste material Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 150000002736 metal compounds Chemical class 0.000 claims abstract description 21
- 239000002250 absorbent Substances 0.000 claims description 16
- 230000002745 absorbent Effects 0.000 claims description 14
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 3
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 abstract description 2
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 abstract description 2
- 235000011126 aluminium potassium sulphate Nutrition 0.000 abstract description 2
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 abstract description 2
- OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 abstract description 2
- 229910001632 barium fluoride Inorganic materials 0.000 abstract description 2
- 229910001863 barium hydroxide Inorganic materials 0.000 abstract description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract description 2
- 239000000920 calcium hydroxide Substances 0.000 abstract description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 2
- 239000000292 calcium oxide Substances 0.000 abstract description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010459 dolomite Substances 0.000 abstract description 2
- 229910000514 dolomite Inorganic materials 0.000 abstract description 2
- 229910052602 gypsum Inorganic materials 0.000 abstract description 2
- 239000010440 gypsum Substances 0.000 abstract description 2
- 229940050271 potassium alum Drugs 0.000 abstract description 2
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract 1
- 238000011282 treatment Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- NPERTKSDHFSDLC-UHFFFAOYSA-N ethenol;prop-2-enoic acid Chemical compound OC=C.OC(=O)C=C NPERTKSDHFSDLC-UHFFFAOYSA-N 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- WZUKKIPWIPZMAS-UHFFFAOYSA-K Ammonium alum Chemical compound [NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O WZUKKIPWIPZMAS-UHFFFAOYSA-K 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 235000011124 aluminium ammonium sulphate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は排土の処理方法に係り、殊に高吸水性樹脂を含
有する排土の処理方法にｆ系る。本発明方法により処理
された排土は例えば埋立てや整地造成等のために利用す
ることができる。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for treating waste soil, and particularly to a method for treating waste soil containing a super absorbent resin. The waste soil treated by the method of the present invention can be used, for example, for reclamation, land leveling, etc.
（従来の技術及び問題点）
近年、シールド工法等において、掘削土砂に高吸水性樹
脂を混合して、土砂の流動性改善、地下水噴出時の止水
、逸泥防止、切羽の安定性向上等を図る技術が開発され
ており、又高吸水性樹脂を汚泥に添加して汚泥を固化さ
せる技術も開発されるに至っている。(Conventional technology and problems) In recent years, in shield construction methods, etc., super absorbent resins are mixed with excavated soil to improve the fluidity of the soil, stop water when groundwater gushes out, prevent mud slippage, improve the stability of the face, etc. Technologies have been developed to achieve this, and technologies have also been developed to solidify sludge by adding superabsorbent resins to the sludge.
これらの技術処理を実施する場合には、当然のことなが
ら、高吸水性樹脂を含有する排土が生成する。When these technical treatments are carried out, it goes without saying that waste soil containing superabsorbent resin is produced.
高吸水性樹脂を含有するこの種の排土を再利用する場合
に、例えば一般の土砂と同様に埋立てや整地造成等に用
いる場合には、高吸水性樹脂が水分を吸排する性質を有
している点に問題がある。即ち、高吸水性樹脂を含有す
る排土を用い例えば埋立てを行って地盤が形成される場
合に乾燥時には上記樹脂中の水分も蒸発により低下して
地盤は安定化するが、降雨等により多量の水分が与えら
れると上記樹脂は水分を吸収して膨潤し、その結果排土
全体としての体積か増加し、地盤は軟弱化するのである
。高吸水性樹脂による水分の吸排は該樹脂が劣化して吸
水能−を衰失するに至るまで繰り返し生じるので、この
種の排土を利用して形成された埋立て地盤はこれが充分
に安定化するまでに比較的長い期間を必要とする。更に
、高吸水性樹脂を含有する排土は流動性に富み、従って
トラックに山積みすることができない等の面で運搬効率
が極めて低いものとなる点にも問題がある。When reusing this type of waste soil containing super-absorbent resin, for example when using it for reclamation or land preparation like general earth and sand, super-absorbent resin has the property of absorbing and discharging moisture. There is a problem with what you are doing. In other words, when the ground is formed by reclamation using waste soil containing super absorbent resin, when it dries, the moisture in the resin decreases due to evaporation and the ground is stabilized, but due to rainfall etc. When water is applied, the resin absorbs water and swells, resulting in an increase in the volume of the entire excavated soil and weakening of the ground. Water absorption and drainage by super absorbent resin occurs repeatedly until the resin deteriorates and loses its water absorbing ability, so the reclaimed ground formed using this type of waste soil is sufficiently stabilized. It takes a relatively long period of time. Furthermore, there is another problem in that the waste soil containing super absorbent resin has high fluidity and therefore cannot be piled up on a truck, resulting in extremely low transportation efficiency.
勿論、土木技術分野において、高吸水性樹脂を用いる既
述の技術処理を行った後に、必要に応じて塩化ナトリウ
ム、塩化カルシウム等の電解質の水溶液を用いて、吸水
膨潤した上記の樹脂から水分を放出させることは上記の
高吸水性樹脂利用技術の付帯技術として知られている（
例えば特開昭５８−２６１９１公報の第２頁右欄第８−
１３行及び同５ｇ −１９１８１１公報の第２頁右欄第
１４−２０行）。しかしながら、これを単なる付帯技術
に留めずに高吸水性樹脂を含有する排土を積極的に処理
する技術として応用発展させる試みは未だなされていな
いのが実情である。Of course, in the civil engineering field, after the above-mentioned technical treatment using a superabsorbent resin, water is removed from the water-absorbed and swollen resin using an aqueous solution of an electrolyte such as sodium chloride or calcium chloride as necessary. Release is known as an incidental technology to the above-mentioned super absorbent resin utilization technology (
For example, in JP-A-58-26191, page 2, right column No. 8-
(line 13 and lines 14-20 of the right column of page 2 of the same publication 5g-191811). However, the reality is that no attempt has yet been made to develop this technology into a technology that actively treats waste soil containing superabsorbent resin, rather than just an incidental technology.
（問題点を解決するための手段及び作用）高吸水性樹脂
含有排土をその侭埋立て等に用いれば既述のような問題
を生じるので、本発明者等は、高吸水性樹脂を含有する
排土の処理について鋭意研究を行った結果、仮置電解質
であっても塩化ナトリウム等の一価金属化合物は処理剤
として不適当なことが先ず判明した。即ち、−価の金属
化合物は上記樹脂が吸収した水分の単純な放出をもたら
すに過ぎず、従って当該金属化合物が存在しなくなれば
樹脂は周囲環境から再び水分を吸収して膨潤するに至る
がらである。このことは、樹脂を劣化させてその吸水能
を喪失させるためには二価又はそれ以上の多価金属化合
物を処理剤として用いなければならないことを意味して
いる。又、この種の処理には多価金属化合物の溶解度が
要件となることも判明した。即ち排土に含有されている
高吸水性樹脂を均斉に劣化させるためには微溶性である
ことが肝要なのである。勿論、溶解度は温度に依存して
変化するので、２０°Ｃの水に対する溶解度で規定する
場合に、本発明方法に使用される多価金属化合物は３−
０．０１％の溶解度を有していることが好ましいのであ
る。(Means and effects for solving the problem) If waste soil containing a super absorbent resin is used for landfilling, etc., the above-mentioned problems will occur. As a result of intensive research into the treatment of waste soil, it was first discovered that monovalent metal compounds such as sodium chloride are inappropriate as treatment agents even for temporary electrolytes. That is, the -valent metal compound merely causes the release of water absorbed by the resin, and therefore, if the metal compound is no longer present, the resin will absorb water again from the surrounding environment and swell. be. This means that a divalent or higher valent metal compound must be used as a treatment agent in order to degrade the resin and cause it to lose its water absorption ability. It has also been found that solubility of the polyvalent metal compound is a requirement for this type of treatment. That is, in order to uniformly degrade the superabsorbent resin contained in the waste soil, it is important that it be slightly soluble. Of course, the solubility changes depending on the temperature, so when defined by the solubility in water at 20°C, the polyvalent metal compound used in the method of the present invention has a 3-
Preferably, it has a solubility of 0.01%.
従って、本発明による高吸水性樹脂を含有する排土の処
理方法は、２０℃の水に対する溶解度が３−０．ＯＩＸ
の多価金属化合物を用いて処理することを特徴としてい
る。Therefore, in the method for treating waste soil containing a superabsorbent resin according to the present invention, the solubility in water at 20°C is 3-0. OIX
It is characterized by processing using a polyvalent metal compound.
２０℃の水に対する溶解度が上記範囲内の多価金属化合
物は微溶性を有しているので排土に混入させた場合に金
属イオンが徐々に溶出して均一に高吸水性樹脂を劣化さ
せる点で好ましい。一方溶解度が上記の範囲を逸脱する
と、例えば溶解度が３Ｘ以上の多価金属化合物を処理剤
とする場合には、添加された多価金属化合物と排土との
混合を短時間に且つ均一となる迄充分に行うことは、処
理すべき排土が一般に大量であること等もあって実際上
困難乃至不可能であるので充分な混合をなし得す、その
結果添加された多価金属化合物が排土全体に行き渡らな
い内にその早期逃出即ち排土部分よりも更に下方の土壌
域への流出又は地下水への浸出が生起して高吸水性樹脂
に対する劣化効果が均一に発現せず吸水能を喪失してい
ない樹脂が部分的に残留してしまう傾向があるので好ま
しくなく、又溶解度が０．０１Ｘ以下の多価金属化合物
を用いると高吸水性樹脂を劣化させてその吸水能を喪失
させる迄の所要期間が長くなり、多価金属化合物を用い
て処理する意味が実際上消失するので好ましくない。Polyvalent metal compounds whose solubility in water at 20°C is within the above range are slightly soluble, so when mixed with waste soil, metal ions will gradually elute and uniformly degrade the superabsorbent resin. It is preferable. On the other hand, if the solubility deviates from the above range, for example, when a polyvalent metal compound with a solubility of 3X or more is used as a treatment agent, the added polyvalent metal compound and waste soil may be mixed in a short time and uniformly. In practice, it is difficult or impossible to thoroughly mix the soil, as the amount of waste soil to be treated is generally large. Before it is distributed throughout the soil, its early escape occurs, that is, it flows into the soil area further below the excavated soil area or seeps into groundwater, and the deterioration effect on the superabsorbent resin is not uniformly expressed and the water absorption capacity is reduced. This is not preferable because the resin that has not been lost tends to partially remain, and if a polyvalent metal compound with a solubility of 0.01X or less is used, the super absorbent resin deteriorates to the point where it loses its water absorbing ability. This is not preferable because the time required for the treatment becomes longer and the meaning of the treatment using a polyvalent metal compound is practically lost.
本発明による処理方法において使用される、溶解度が３
−０．０１％の多価金属化合物としては弗化アルミニウ
ム、弗化バリウム、水酸化バリウム、炭酸バリウム、ア
ルミン酸カルシウム水和物、生石灰、消石灰、各種の石
膏、ドロマイト、カリウムミョウバン、アンモニウムミ
ョウバン等を挙げることができる。これらの多価金属化
合物は固体状態の侭で、或は水又は他の媒体に溶解又は
分散された状態で排出に添加混合することができる。排
出に対する多価金属化合物の使用割合は、排土に含有さ
れている高吸水性樹脂の量に依存するが、−最的には排
土に対して０．０１−３０％程度である。The solubility used in the treatment method according to the invention is 3.
-0.01% polyvalent metal compounds include aluminum fluoride, barium fluoride, barium hydroxide, barium carbonate, calcium aluminate hydrate, quicklime, slaked lime, various types of gypsum, dolomite, potassium alum, ammonium alum, etc. can be mentioned. These polyvalent metal compounds can be added to the effluent while in the solid state or dissolved or dispersed in water or other media. The proportion of the polyvalent metal compound used in the discharge depends on the amount of super absorbent resin contained in the discharged soil, but is ultimately about 0.01-30% with respect to the discharged soil.
本発明による処理方法の実施に際して、多価金属化合物
を高吸水性樹脂含有排土に添加混合する方法としては、
ベルトコンベア上で搬送白れつつある排土に添加混合す
る方法、排土のＢ送うインに注入する方法、各種のミキ
サーを井いる方法、スクリュコンベアの途中で注入する
方法、排土を埋立地に堆積させた後にこの堆程排土上に
散布する方法等があるが、格別のＭ団はないのでこれら
の方法を適宜選択すること力できる。When carrying out the treatment method according to the present invention, the method of adding and mixing a polyvalent metal compound to waste soil containing super absorbent resin is as follows:
A method of adding and mixing waste soil that is being transported on a belt conveyor, a method of injecting it into the B feed-in of the waste soil, a method of drilling various types of mixers, a method of injecting it in the middle of a screw conveyor, a method of disposing of waste soil as a landfill. There are methods such as depositing it on the ground and then spraying it on the composted soil, but since there is no particular M group, you can choose any of these methods as appropriate.
（実施例等）
次に、実施例及び比較例に関連して本発明を更に詳細に
説明する。(Examples, etc.) Next, the present invention will be described in further detail with reference to Examples and Comparative Examples.
Ｋ隻Ｍ」」１乙ユ
泥土圧シールド工法において高吸水性樹脂［スミカゲル
５−５０ ＜商標）住友化学工業株式会社製コを０．
２％（重量比率）注入して堀削して得た排出を試料とし
、これに多価金属化合物を所定量添加して充分に混合し
た後に天日乾畑させ（所要日数約３日）、この乾燥試料
に充分量の水を添加した後に過剰な水分を除去し、次い
で試料の体積増加率を測定した。結果は下記の表１に示
される通りであった。1. In the Otoyu mud earth pressure shield construction method, super absorbent resin [Sumikagel 5-50 <trademark] manufactured by Sumitomo Chemical Co., Ltd.
The discharge obtained by injecting 2% (weight ratio) and digging is used as a sample, and a predetermined amount of polyvalent metal compound is added to this, mixed thoroughly, and then dried in the sun (required approximately 3 days). After adding a sufficient amount of water to the dried sample, excess water was removed, and the volume increase rate of the sample was then measured. The results were as shown in Table 1 below.
］ 表−上 注）多価金属化合物の添加量は重量％で示されている。】 Table - Top Note) The amount of polyvalent metal compound added is shown in weight%.
３並びに １ び２
泥土圧シールド工法において高吸水性樹脂［スミカゲル
５−５０ ＜商標）住友化学工業株式会社製］を０．
２％ （重量比率）注入して堀削して得た排土ｌトンを
それぞれ試料とし、各試料を木枠で区分した１ｆｆｌに
１ｍの区画に埋立てた。次いで、その表面に多価金属化
合物を １ｋｇ宛均−に散布し、毎日１回充分に散水し
た。3 and 1 and 2 In the mud pressure shield method, super absorbent resin [Sumikagel 5-50 <trademark] manufactured by Sumitomo Chemical Industries, Ltd.] was applied to 0.
One ton of excavated soil obtained by pouring 2% (weight ratio) and digging was used as a sample, and each sample was reclaimed in a 1 m section divided into 1 ffl divided by wooden frames. Next, 1 kg of a polyvalent metal compound was evenly sprinkled on the surface, and water was thoroughly sprinkled once every day.
散水後の埋立て土砂（改良土）の状態を３日、５日、１
０日及び１ケ月後に観察した結果は下記の表２に示され
る通りであった。The condition of the reclaimed soil (improved soil) after watering was evaluated on the 3rd, 5th, and 1st.
The results observed after 0 days and 1 month were as shown in Table 2 below.
（発明の効果）
高吸水性樹脂含有排土を本発明方法により処理すること
によって、当該排土に含まれる樹脂は劣化して吸水能を
喪失する。従って、本発明方法により処理された排土を
埋立て等に用いて形成された地笈は降雨による体積増加
や軟弱ｒヒをもたらさない６更に１本発明方法により処
理された排土は未処理の排土と比較して流動性が低いの
でトラックによる山積み輸送が可能となり、運搬効率の
向上かもたらされる。(Effects of the Invention) By treating waste soil containing a super absorbent resin by the method of the present invention, the resin contained in the waste soil deteriorates and loses its water absorption ability. Therefore, the ground cover formed by using the waste soil treated by the method of the present invention for reclamation, etc. does not cause volume increase or softening due to rainfall. 6 Furthermore, the waste soil treated by the method of the present invention does not cause untreated Since the fluidity is lower than that of the excavated soil, it is possible to transport it in piles by truck, which improves transportation efficiency.
Claims (1)
価金属化合物を用いて処理することを特徴とする、高吸
水性樹脂を含有する排土の処理方法。(1) A method for treating waste soil containing a super absorbent resin, characterized by treating it with a polyvalent metal compound having a solubility in water of 20° C. of 3-0.01%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29657886A JPH0713231B2 (en) | 1986-12-15 | 1986-12-15 | Method for treating waste soil containing super absorbent resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29657886A JPH0713231B2 (en) | 1986-12-15 | 1986-12-15 | Method for treating waste soil containing super absorbent resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63150374A true JPS63150374A (en) | 1988-06-23 |
| JPH0713231B2 JPH0713231B2 (en) | 1995-02-15 |
Family
ID=17835354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29657886A Expired - Lifetime JPH0713231B2 (en) | 1986-12-15 | 1986-12-15 | Method for treating waste soil containing super absorbent resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713231B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014156546A (en) * | 2013-02-15 | 2014-08-28 | Waseda Univ | Swellable high-water-absorption polymer stabilizing liquid composition for shielding method and execution method using the same |
-
1986
- 1986-12-15 JP JP29657886A patent/JPH0713231B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014156546A (en) * | 2013-02-15 | 2014-08-28 | Waseda Univ | Swellable high-water-absorption polymer stabilizing liquid composition for shielding method and execution method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0713231B2 (en) | 1995-02-15 |
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