JPH0672513B2 - Conditioner for muddy water - Google Patents
Conditioner for muddy waterInfo
- Publication number
- JPH0672513B2 JPH0672513B2 JP19958788A JP19958788A JPH0672513B2 JP H0672513 B2 JPH0672513 B2 JP H0672513B2 JP 19958788 A JP19958788 A JP 19958788A JP 19958788 A JP19958788 A JP 19958788A JP H0672513 B2 JPH0672513 B2 JP H0672513B2
- Authority
- JP
- Japan
- Prior art keywords
- muddy water
- water
- weight
- gum
- cmc
- 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.)
- Expired - Lifetime
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Description
本発明は、土木基礎工事の安定液掘削工法に使用する泥
水用調整剤に関するものである。The present invention relates to a muddy water conditioner used in a stable liquid excavation method for civil engineering foundation works.
従来の泥水用調整剤としては、例えば近年、無公害工法
が要求される現状から、比較的公害の少ない泥水工法が
遂道、場所打ち坑、連続地中壁などの構築に用いられ
る。 泥水の主成分は水とベントナイトと呼ばれる鉱物である
が、この泥水を増粘させ脱水量を減少させると共にチキ
ソトロピー性を与えるため、カルボキシメチルセルロー
ス（以下CMCと略す）、キサンタンガム等の水溶性高分
子を添加することが行なわれている。As a conventional adjusting agent for muddy water, for example, in recent years, a pollution-free construction method is required, so that a muddy water construction method with relatively little pollution is used for construction of a continuous road, a cast pit, a continuous underground wall and the like. The main components of mud water are minerals called water and bentonite, but in order to thicken the mud and reduce the amount of dehydration and to give thixotropic properties, water-soluble polymers such as carboxymethyl cellulose (hereinafter abbreviated as CMC) and xanthan gum are added. It is being added.
しかしながら、このような従来のCMCにあっては、通常
の水を使用するときは泥水として満足される性能を示す
ものの、無機粘土等を併用して海水や塩水を使用した場
合には泥水の性能や安定性が劣化するという難点があ
る。一方キサンタンガムの場合は、通常水、海水共に泥
水として一応の安定性はあるものの、脱水減少能に劣
る。CMCをキサンタンガムと併用すると、キサンタンガ
ムに含まれている酵素によって粘度低下を起こし、泥水
の粘度を低下させ、脱水性能を悪化させるという問題点
があつた。However, in such a conventional CMC, although it shows satisfactory performance as muddy water when ordinary water is used, when muddy water is used in combination with inorganic clay, muddy water performance is improved. There is a problem that stability deteriorates. On the other hand, in the case of xanthan gum, both normal water and seawater have some stability as muddy water, but the ability to reduce dehydration is poor. When CMC is used in combination with xanthan gum, the enzyme contained in xanthan gum causes a decrease in viscosity, which reduces the viscosity of muddy water and deteriorates the dehydration performance.
この発明は、このような従来の問題点に着目してなされ
たものであり、ラムザンガム及びCMCを配合してなる泥
水用調整剤を見い出した。すなわち本発明はラムザンガ
ムとCMCの配合比率はラムザンガムが95〜５重量％に対
し、CMCが５〜95重量％の範囲であり好ましくはラムザ
ンガム95〜30重量％に対しCMCが５〜70重量％の範囲で
あり、さらに好ましくはラムザンガム80〜30重量％に対
しCMCが20〜70重量％の範囲である。 泥水に対する本発明の泥水用調整剤の調合方法は、あら
かじめ、ラムザンガムとCMCを乾式混合したのち、泥水
に添加してもよく、あるいは、ラムザンガムとCMCとを
別々に泥水に添加して混合してもよい。又、本発明の泥
水用調整剤の泥水への添加量は、混練水の100重量部に
対し0.01〜５重量％、好ましくは0.05〜２重量部であ
る。 泥水に使用される混練り水には、一般の水道水、地下水
のほか、塩水や海水でもよい。無機粘土類としてはベン
トナイト、アタパルジャイト、粉末粘土などが挙げられ
る。この無機粘土類の使用量はとくに限定されるもので
はなく、要求される泥水比重に応じて適宜変えることが
できる。通常、泥水の水100重量部に対し、0.1〜60重量
部、好ましくは0.5〜40重量部である。 更に泥水には必要により比重調整剤、分散剤、逸泥防止
剤、pH調整剤、保護コロイド剤、界面活性剤、殺菌剤、
防腐防かび剤、酸化防止剤などを添加することができ
る。 （手段を構成する要件） 本発明に使用する泥水用調整剤に使用する薬剤としては
ラムザンガム及びCMCを必須成分とする泥水用調整剤が
挙げられる。 本発明において、使用するラムザンガムは醗酵糖類であ
り、微生物Alcaligenes species,ATCC 31961（American
Type Culture Collectionに登録されたNo.）がグルコ
ースを醗酵させてその菌体外に蓄積した多糖類を、精製
し粉末にした天然ガム質である。その化学構造は、下記
に示すように、主鎖は、２個のグルコースと、グルクロ
ン酸とラムノースが各１個、側鎖は、２個のグルコース
より構成されている。 （Ｍ＋はナトリウム、カルシウム、カリウム等） CMCはセルロース（パルプ）とモノクロル酢酸を反応さ
せて得られるカルボキシメチルセルロースをいい、本発
明では、平均置換度が0.5以上で、ナトリウムなどの塩
であることが好ましい。The present invention has been made by paying attention to such conventional problems, and has found out a mud water conditioner containing a mixture of rhamzan gum and CMC. That is, in the present invention, the blending ratio of rumzan gum and CMC is in the range of 5 to 95% by weight with respect to 95 to 5% by weight of ramzan gum, preferably from 5 to 70% by weight of CMC to 95 to 30% by weight of rumzan gum. CMC is in the range of 20 to 70% by weight with respect to 80 to 30% by weight of rhamsan gum. The preparation method of the muddy water regulator of the present invention with respect to muddy water is, in advance, after dry-blending ramzan gum and CMC, it may be added to muddy water, or, ramzan gum and CMC are separately added to muddy water and mixed. Good. The amount of the muddy water regulator of the present invention added to muddy water is 0.01 to 5% by weight, preferably 0.05 to 2 parts by weight, based on 100 parts by weight of kneading water. The kneading water used for muddy water may be ordinary tap water, ground water, salt water, or sea water. Examples of the inorganic clays include bentonite, attapulgite, and powdered clay. The amount of the inorganic clay used is not particularly limited and can be appropriately changed depending on the required specific gravity of muddy water. Usually, it is 0.1 to 60 parts by weight, preferably 0.5 to 40 parts by weight, based on 100 parts by weight of muddy water. Furthermore, if necessary, muddy water may include a specific gravity adjusting agent, a dispersant, a mud loss preventing agent, a pH adjusting agent, a protective colloid agent, a surfactant, a bactericide,
Antiseptic and antifungal agents, antioxidants and the like can be added. (Requirements Constituting Means) Examples of the agent used for the muddy water conditioner used in the present invention include a muddy water conditioner containing rumuzan gum and CMC as essential components. In the present invention, the rhamsan gum used is a fermenting saccharide and is a microorganism Alcaligenes species, ATCC 31961 (American
No. registered in the Type Culture Collection) is a natural gum that is obtained by refining glucose and fermenting the polysaccharides that have accumulated outside the cells to make powder. As shown in the chemical structure below, the main chain is composed of two glucoses, one each of glucuronic acid and rhamnose, and the side chain of two glucoses. (M + is sodium, calcium, potassium, etc.) CMC refers to carboxymethyl cellulose obtained by reacting cellulose (pulp) with monochloroacetic acid, and in the present invention, the average degree of substitution is 0.5 or more, and it may be a salt such as sodium. preferable.
本発明では各配合材料およびその配合量が適切に配合さ
れているとともに、ラムザンガム及びCMCを必須成分と
する泥水用調整剤を添加することに主要点がある。 本発明の泥水用調整剤を構成している物質であるラムザ
ンガムはチキソトロピー性を有しており、単独では泥水
としての安定性はあるものの脱水減少能に劣る。しかし
乍らラムザンガムには、酵素が含まれていないためCMC
を併用しても粘度低下を防ぎ且つ泥水の粘度低下や脱水
性能を良好に保つ。 つまりラムザンガムとCMCの併用の比率をラムザンガム
が95〜５重量％に対しCMCが５〜95重量％の範囲に置く
ことにより、泥水としての安定性に優れ、粘度や脱水性
能を良好に保った泥水を調整することができる。In the present invention, each compounding material and its compounding amount are properly compounded, and the main point is to add a mud water regulator having rumzan gum and CMC as essential components. Ramzan gum, which is a substance constituting the muddy water conditioner of the present invention, has thixotropic properties, and is stable as muddy water by itself, but is inferior in dehydration reducing ability. However, because Rumzan gum does not contain enzymes, CMC
Even when used together, the viscosity is prevented from lowering, and the viscosity of muddy water and the dewatering performance are kept good. In other words, by setting the ratio of the combined use of rumzan gum and CMC in the range of 95 to 5% by weight of ramzan gum and 5 to 95% by weight of CMC, the stability as muddy water is excellent, and the muddy water with good viscosity and dewatering performance is maintained. Can be adjusted.
以下実施例により本発明を説明するが、本発明はこれに
限定されるものではない。なお、実施例及び比較例にお
ける試験方法は次のとおりである。 (1) ファンネル粘度（FV）:500ccのフアンネル粘度計
で測定した。単位は秒。 (2) 脱水量（FL）:API規格による濾過機を用い、3kg/c
m2の圧力下、30分後の脱水量。単位ｍ。 (3) 分散安定性：泥水100mを100mメスシリンダー
に入れて１日、３日間静置後に観察した。上部に透明な
上澄水が5m以上生じるときは不良、１〜5mのときは
やや不良、上澄水がなく均一に分散しているときは良好
とした。 実施例１ ラムザンガムとCMCの併用時の粘度変化を清水にて測定
した。結果を第１表に示す。 ※BM型粘度計 ローターNO.3 30rpm at25℃ ※CMCNaのエーテル化度0.85 本発明の泥水用調整剤を用いた溶液はほとんど粘度低下
が生じる比較例は早期に粘度低下を示すことがわかる。 実施例２ 人工海水（JIS K−2510を使用）100重量部に、ベントナ
イト２重量部に泥水用調整剤を第２表に示す量だけ添加
して泥水を調整し、その性状を測定した。結果を第２表
に示す。 本発明の泥水用調整剤を用いた泥水は粘度低下が生じず
比較例は粘度低下を示すことがわかる。又本発明の泥水
用調整剤を用いた泥水は分散安定性も優れている事がわ
かる。 実施例３ 人工海水（JIS K−2510）100重量部に、ベントナイト２
重量部に泥水用調整剤を第３表に示す量だけ添加して泥
水を同一粘度に調整し、その脱水量を測定した。結果は
第３表に示す。 本発明の泥水用調整剤を用いた泥水はラムザンガム、キ
サンタンガム泥水に比し脱水量が少ない事がわかる。 実施例４ 水道水100重量部にベントナイト６重量部に泥水用調整
剤を第４表に示す量だけ添加して泥水を調整し、その性
状を測定した。結果を第４表に示す。 本発明の泥水用調整剤を用いた泥水は粘度も安定してお
り分散安定性も良好であるがキサンタンガムとCMCの併
用は粘性は低下し、分散安定性はやや不良となる事がわ
かる。The present invention will be described below with reference to examples, but the present invention is not limited thereto. The test methods in Examples and Comparative Examples are as follows. (1) Funnel viscosity (FV): measured with a 500 cc funnel viscometer. The unit is seconds. (2) Dehydration rate (FL): 3kg / c using a filter according to API standard
Dehydration amount after 30 minutes under a pressure of m 2 . Unit m. (3) Dispersion stability: 100 m of muddy water was placed in a 100 m graduated cylinder and observed after standing still for 1 day and 3 days. When the transparent supernatant water was 5 m or more in the upper part, it was evaluated as poor, when it was 1 to 5 m, it was evaluated as slightly poor, and when it was uniformly dispersed without supernatant water, it was evaluated as good. Example 1 The change in viscosity when lambsangum and CMC were used in combination was measured with fresh water. The results are shown in Table 1. * BM viscometer rotor NO.3 30 rpm at 25 ° C * etherification degree of CMCNa 0.85 It can be seen that the viscosity of the solution using the modifier for muddy water of the present invention decreases almost at all in the comparative example. Example 2 To 100 parts by weight of artificial seawater (using JIS K-2510), 2 parts by weight of bentonite was added by the amount shown in Table 2 to adjust the amount of the muddy water, and the properties thereof were measured. The results are shown in Table 2. It can be seen that the muddy water using the muddy water modifier of the present invention does not cause a decrease in viscosity and the comparative examples show a decrease in viscosity. Further, it is understood that the muddy water using the muddy water conditioner of the present invention has excellent dispersion stability. Example 3 Bentonite 2 was added to 100 parts by weight of artificial seawater (JIS K-2510).
The amount of the dewatering amount was measured by adding the amount of the muddy water adjusting agent to the parts by weight in an amount shown in Table 3 to adjust the muddy water to the same viscosity. The results are shown in Table 3. It can be seen that the amount of dewatered muddy water using the muddy water conditioner of the present invention is smaller than that of rhamsan gum and xanthan gum muddy water. Example 4 Muddy water was added to 100 parts by weight of tap water and 6 parts by weight of bentonite in an amount shown in Table 4 to prepare muddy water, and the properties thereof were measured. The results are shown in Table 4. It can be seen that the muddy water using the muddy water modifier of the present invention has a stable viscosity and good dispersion stability, but the combined use of xanthan gum and CMC lowers the viscosity and makes the dispersion stability somewhat poor.
本発明の泥水用調整剤を添加した泥水は下記のような種
々の特長を有している。 無機粘土類の分散安定性にすぐれている。 脱水量が少なく、造壁性に優れ構（孔）壁の崩壊防止
性能がすぐれている。 混練水としては海水や塩水等による調整も可能であ
る。 塩を夾雑した地盤であっても掘削が可能である。 少ない添加量で、泥水として必要な粘度を示す。The muddy water to which the muddy water regulator of the present invention is added has various features as described below. Excellent dispersion stability of inorganic clays. It has a small amount of dehydration, excellent wall-building properties, and excellent performance of preventing collapse of structural walls. The kneading water can be adjusted with sea water, salt water, or the like. It is possible to excavate the ground even if it is contaminated with salt. It shows the viscosity required for muddy water with a small amount of addition.
Claims (2)
カルボキシメチルセルロースを必須成分とする泥水用調
整剤。1. A muddy water conditioner which contains rumzan gum and carboxymethyl cellulose having an average degree of substitution of 0.5 or more as essential components.
方法。2. A method for adjusting drilling mud with the adjusting agent according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19958788A JPH0672513B2 (en) | 1988-06-10 | 1988-08-10 | Conditioner for muddy water |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63-144451 | 1988-06-10 | ||
| JP14445188 | 1988-06-10 | ||
| JP19958788A JPH0672513B2 (en) | 1988-06-10 | 1988-08-10 | Conditioner for muddy water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0280784A JPH0280784A (en) | 1990-03-20 |
| JPH0672513B2 true JPH0672513B2 (en) | 1994-09-14 |
Family
ID=26475867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19958788A Expired - Lifetime JPH0672513B2 (en) | 1988-06-10 | 1988-08-10 | Conditioner for muddy water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672513B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000282021A (en) * | 1999-03-31 | 2000-10-10 | Nippon Paper Industries Co Ltd | Muddy water-stabilizing liquid for digging |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4929112B2 (en) * | 2007-09-27 | 2012-05-09 | カルソニックカンセイ株式会社 | Swash plate compressor |
-
1988
- 1988-08-10 JP JP19958788A patent/JPH0672513B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000282021A (en) * | 1999-03-31 | 2000-10-10 | Nippon Paper Industries Co Ltd | Muddy water-stabilizing liquid for digging |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0280784A (en) | 1990-03-20 |
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