JPH0376989A - Modifier for excavated clays - Google Patents
Modifier for excavated claysInfo
- Publication number
- JPH0376989A JPH0376989A JP21463389A JP21463389A JPH0376989A JP H0376989 A JPH0376989 A JP H0376989A JP 21463389 A JP21463389 A JP 21463389A JP 21463389 A JP21463389 A JP 21463389A JP H0376989 A JPH0376989 A JP H0376989A
- Authority
- JP
- Japan
- Prior art keywords
- clays
- water
- modifier
- acrylamide
- acrylic acid
- 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.)
- Pending
Links
- 239000003607 modifier Substances 0.000 title claims abstract description 9
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 9
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 8
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 6
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 6
- 229920001577 copolymer Polymers 0.000 claims abstract description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 5
- 239000000178 monomer Substances 0.000 claims abstract description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 4
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 7
- 229920002907 Guar gum Polymers 0.000 claims description 3
- 239000000665 guar gum Substances 0.000 claims description 3
- 229960002154 guar gum Drugs 0.000 claims description 3
- 235000010417 guar gum Nutrition 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 150000003839 salts Chemical class 0.000 abstract description 9
- 239000004927 clay Substances 0.000 abstract description 5
- 238000013329 compounding Methods 0.000 abstract 1
- 239000000440 bentonite Substances 0.000 description 6
- 229910000278 bentonite Inorganic materials 0.000 description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- -1 poly(vinyl acetate-maleic anhydride) Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006266 etherification reaction Methods 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 2
- 101100083507 Caenorhabditis elegans acl-2 gene Proteins 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 239000011575 calcium Chemical group 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000011591 potassium Chemical group 0.000 description 1
- 229910052700 potassium Chemical group 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
本発明は、土木基礎工事における掘削泥水に使用する粘
土類の改質剤に関するものである。The present invention relates to a clay modifier used for drilling mud in civil engineering foundation work.
従来のベントナイト改質剤としては、例えば、特公昭５
７−２９５０４号等に記載されているように、ポリアク
リル酸、ポリ（ビニルアセテート−マレイン酸無水物）
、ポリ（エチレン−マレイン酸無水物）、ポリ（ビニル
メチルエーテル−マレイン酸無水物）等のカルボン酸含
量２０〜１００モル％の合成ポリマーが使用される。
しかしながら、このような従来のカルボン酸含有ポリマ
ーにあっては、カルボン酸が改質の根拠となっているた
め、上記薬剤で改質された掘削用粘土類は耐塩性が不良
であった。
特に海水が混入する恐れある掘削においては、使用され
る水が必ずしも、純水でなく、又、海水地盤を掘削する
時にはＮａＣＪ２だけでなく、Ｃａｚ 、Ｍ ｇ ＊’
等の２価塩も多量に混入し、泥水を汚染する。
掘削用粘土類を調整するに当っては、各種要求に対応す
ることが必要となり、清水ばかりでなく、塩水に対して
も有効であることがより望ましい。
従来のカルボン酸含有ポリマーでは上記問題に対しては
無効であり、清水使用の場合においてのみ有効であると
いう問題点があった。As a conventional bentonite modifier, for example,
As described in No. 7-29504, polyacrylic acid, poly(vinyl acetate-maleic anhydride)
Synthetic polymers having a carboxylic acid content of 20 to 100 mol %, such as poly(ethylene-maleic anhydride), poly(vinyl methyl ether-maleic anhydride), are used. However, in such conventional carboxylic acid-containing polymers, since the carboxylic acid is the basis for modification, excavation clays modified with the above-mentioned chemicals have poor salt resistance. Particularly in drilling where seawater may be mixed in, the water used is not necessarily pure water, and when drilling in seawater ground, not only NaCJ2 but also Caz, M g *'
A large amount of divalent salts such as salts are mixed in and contaminate the muddy water. When preparing clay for excavation, it is necessary to meet various requirements, and it is more desirable that the clay be effective not only for fresh water but also for salt water. Conventional carboxylic acid-containing polymers are ineffective against the above problems and are only effective when using fresh water.
以上の現状に鑑み、本発明が解決しようとする課題は、
掘削用粘土類を調整するに当たって、清水ばかりでなく
塩水に対しても有効である掘削粘土類を得るための改質
剤を提供することである。In view of the above-mentioned current situation, the problems to be solved by the present invention are as follows:
To provide a modifier for obtaining excavation clays that are effective not only for fresh water but also for salt water in preparing excavation clays.
【課題を解決するための手ｊＪｌｌ］
この発明は、このような従来の問題点に着眼してなされ
たものである。
すなわち、
ラムザンガムとカルボキシメチルセルロースに併用して
、グアガム、およびアクリルアミドとアクリル酸又はそ
の他のビニルモノマーとの共重合体から選択された水溶
性ポリマーを配合することを特徴とする土木基礎工事の
掘削泥水に使用する粘土類の改質剤を提供するものであ
る。
本発明に使用するラムザンガム類は醗酵多糖類であり、
微生物Ａｌｃａｌｆｇｅｎｅｓ ５ｐｅｃｉｅｓ、Ａ
ＴＣＣ３１９６１（Ａｍｅｒｉｃａｎ Ｔｙｐｅ
Ｃｕ１ｔｕｒｅ Ｃｏ１１ｅｃｔｔｏｎに登録された
Ｎｏ、）がグルコースな発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′尋）ラム
ザンガムとカルボキシメチルセルロースに併用できる他
の水溶性ポリマーとしては、ａ、グアガム
ｂ、アクリルアミドとアクリル酸との共重合ポリマー
Ｃ，アクリルアミドと共重合可能なその他のビニルモノ
マーとの共重合体
等が挙げられる。
本発明改質剤は通常の方法で粘土と共に配合し、泥水を
調整すればよい。
更に泥水には必要により水溶性ポリマー、比重調整剤、
分散剤、逸泥防止剤、ｐＨｒＡ整剤、保護コロイド剤、
界面活性剤、殺菌剤、防腐防黴剤、酸化防止剤などを添
加することができる。
【作用】
本発明改質剤は塩水系システムにおいても増粘し、従来
のカルボン酸含有薬剤では達成できないＦＬ値を小さく
することができ、品質の劣るベントナイトに少量添加す
ることにより、泥水調整時のマッド特性値を改良できる
。
（実施例）
次に実施例を挙げて本発明を説明するが、本発明はこれ
ら実施例に限定されるものでない、、（％、部は重量基
準を示す）
実施例１
ベントナイトＡに薬剤０．２％量を均−混合後、４％Ｎ
ａＣｌ２水に調整後のベントナイト４％量を懸濁して泥
水を調整した。泥水を試験した結果を第１表に示した。
ＰＡＭ ：ポリアクリルアミドの２５％加水分解率、分
子量１０００万
ＣＭＣ： １％粘度３０００ＣＰ、エーテル化度０．８
５のカルボキシメチルセルロースＮａ塩ＡＶ、ＦＬ：Ａ
ＰＩ（７）方法による。ＡＶは見かけ粘度（ＣＰ） 、
ＦＬは濾水量（ｍｇ）第１表により、本発明例の１，２
．３は比較例に比して得られた泥水のＡＶ値、およびＦ
Ｌ値が良好である。
実施例２
ベントナイトＢに薬剤０．１％量を均一に混合した後、
本ベントナイト４％量を（３０％ＮａＣ氾＋１％ＣａＣ
ｊ’！ ＋１％ＭｇＣ１）を組成とする塩水に対して懸
濁させて泥水を調整した。泥水を試験した結果を第２表
に示した。
ＰＡＭ：ポリアクリルアミドの２５％加水分解率、分子
量１ｏｏｏ万
ＣＭＣ： １％粘度３０００ＣＰ、エーテル化度０．８
５のカルボキシメチルセルロースＮａ塩ＡＶ、ＰＬは実
施例１と同じ。
第２表により、本発明例の１．２．３は比較例に比して
得られた泥水のＡＶ値、およびＦＬ値が良好である。[Measures to Solve the Problems] The present invention has been made by paying attention to such conventional problems. That is, for drilling mud for civil engineering foundation work, which is characterized by blending a water-soluble polymer selected from guar gum and copolymers of acrylamide and acrylic acid or other vinyl monomers together with ramsan gum and carboxymethylcellulose. The present invention provides a modifier for clays to be used. Ramzan gums used in the present invention are fermented polysaccharides,
Microorganism Alcalfgenes 5pecies, A
TCC31961 (American Type
It is a natural gummy substance made by purifying and powdering polysaccharides that are fermented and accumulated outside the bacterial cells. As shown below, its chemical structure has a main chain composed of two glucose molecules. (M' is sodium, calcium, and potassium) Other water-soluble polymers that can be used in combination with Ramsan gum and carboxymethyl cellulose include a, guar gum B, copolymer C of acrylamide and acrylic acid, and others that can be copolymerized with acrylamide. Examples include copolymers with vinyl monomers. The modifier of the present invention may be mixed with clay in a conventional manner to prepare muddy water. Furthermore, for muddy water, water-soluble polymers, specific gravity adjusters,
Dispersant, sludge prevention agent, pHrA adjuster, protective colloid agent,
Surfactants, bactericides, preservatives, anti-oxidants, etc. can be added. [Effect] The modifier of the present invention increases viscosity even in saltwater systems, and can reduce the FL value that cannot be achieved with conventional carboxylic acid-containing agents.By adding a small amount to inferior quality bentonite, it can be used when adjusting muddy water. You can improve the mud characteristic values of. (Example) Next, the present invention will be explained with reference to Examples, but the present invention is not limited to these Examples. (% and parts are based on weight) Example 1 Bentonite A with no drug After uniformly mixing .2% amount, 4%N
Mud water was prepared by suspending 4% of the adjusted bentonite in aCl2 water. The results of testing muddy water are shown in Table 1. PAM: 25% hydrolysis rate of polyacrylamide, molecular weight 10 million CMC: 1% viscosity 3000CP, degree of etherification 0.8
5 carboxymethylcellulose Na salt AV, FL:A
According to the PI(7) method. AV is apparent viscosity (CP),
FL is the filtration rate (mg) according to Table 1.
．． 3 is the AV value of the muddy water obtained in comparison with the comparative example, and F
Good L value. Example 2 After uniformly mixing 0.1% of the drug into bentonite B,
This bentonite amount is 4% (30% NaC flood + 1% CaC
j'! Mud water was prepared by suspending it in salt water having a composition of +1% MgCl). The results of testing muddy water are shown in Table 2. PAM: 25% hydrolysis rate of polyacrylamide, molecular weight 100,000 CMC: 1% viscosity 3000CP, degree of etherification 0.8
Carboxymethyl cellulose Na salt AV and PL of No. 5 are the same as in Example 1. According to Table 2, Examples 1.2.3 of the present invention have better AV values and FL values of muddy water than Comparative Examples.
以上説明した通り、本発明により土木基礎工事における
掘削泥水に使用する粘土類の耐塩性が向上し、優れた掘
削泥水を提供することができる。As explained above, according to the present invention, the salt resistance of clays used for drilling mud in civil engineering foundation work is improved, and excellent drilling mud can be provided.
Claims (1)
、グアガム、およびアクリルアミドとアクリル酸又はそ
の他のビニルモノマーとの共重合体から選択された水溶
性ポリマーを配合することを特徴とする土木基礎工事の
掘削泥水に使用する粘土類の改質剤。A water-soluble polymer selected from guar gum and a copolymer of acrylamide and acrylic acid or other vinyl monomer is used in combination with ramsan gum and carboxymethylcellulose, and is used in drilling mud for civil engineering foundation work. Modifier for clays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21463389A JPH0376989A (en) | 1989-08-21 | 1989-08-21 | Modifier for excavated clays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21463389A JPH0376989A (en) | 1989-08-21 | 1989-08-21 | Modifier for excavated clays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0376989A true JPH0376989A (en) | 1991-04-02 |
Family
ID=16658972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21463389A Pending JPH0376989A (en) | 1989-08-21 | 1989-08-21 | Modifier for excavated clays |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0376989A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005187503A (en) * | 2003-12-24 | 2005-07-14 | Terunaito:Kk | Additive for civil engineering and stabilizing liquid using the same |
-
1989
- 1989-08-21 JP JP21463389A patent/JPH0376989A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005187503A (en) * | 2003-12-24 | 2005-07-14 | Terunaito:Kk | Additive for civil engineering and stabilizing liquid using the same |
| JP4567325B2 (en) * | 2003-12-24 | 2010-10-20 | 株式会社テルナイト | Stabilizing liquid for propulsion drilling or mud pressure shield drilling |
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