JP2002003843A - Additive for soil-improvement construction method - Google Patents
Additive for soil-improvement construction methodInfo
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- JP2002003843A JP2002003843A JP2000188652A JP2000188652A JP2002003843A JP 2002003843 A JP2002003843 A JP 2002003843A JP 2000188652 A JP2000188652 A JP 2000188652A JP 2000188652 A JP2000188652 A JP 2000188652A JP 2002003843 A JP2002003843 A JP 2002003843A
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- soil
- additive
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- 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.)
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地盤改良工法用添
加剤、該地盤改良工法用添加剤を含有した水硬性セメン
ト組成物並びに該水硬性セメント組成物を用いた地盤改
良工法に関する。[0001] The present invention relates to an additive for a soil improvement method, a hydraulic cement composition containing the additive for a soil improvement method, and a soil improvement method using the hydraulic cement composition.
【０００２】[0002]
【従来の技術】一般に深層混合処理工法におけるセメン
トミルクを用いる工法やソイルセメント柱列壁工法等
は、ボーリングを行い、地中に水硬性組成物スラリーを
送り、土砂を地上に排出しながら土砂と水硬性組成物ス
ラリーとが混合されたもので地盤改良を行い、地中に改
良体を造成している。水硬性組成物スラリーには、ワー
カビリティーの改善のため、ナフタレンスルホン酸塩ホ
ルマリン縮合物等のナフタレン系高性能減水剤が使用さ
れるが、ナフタレン系減水剤はセメント等を含有する水
硬性組成物の分散能は大きいものの、粘性土の分散能は
小さい。そのため粘性土分の多い粘性土地盤での施工で
は、水硬性組成物の分散性が良好で、さらに粘性土が混
入しても良好な分散保持性を有し、かつ起泡性も低く、
硬化性能を損なうこともない地盤改良工法用添加剤の開
発が望まれている。なお、粘性土とは土木工学的な分類
で規定されるものを言い、以下、単に粘土と言う場合、
該粘性土を含む。2. Description of the Related Art Generally, in a deep mixing method, a method using cement milk, a soil-cemented column wall method, etc. are performed by boring, sending a hydraulic composition slurry into the ground, and discharging soil and soil while discharging the soil to the ground. The ground is improved with a mixture of the hydraulic composition slurry and an improved body is created in the ground. In the hydraulic composition slurry, a naphthalene-based high-performance water reducing agent such as a naphthalene sulfonate formalin condensate is used for the improvement of workability, and the naphthalene-based water reducing agent is used for a hydraulic composition containing cement and the like. Although the dispersing ability is large, the dispersing ability of the cohesive soil is small. Therefore, in the construction on the viscous ground with a lot of viscous soil, the dispersibility of the hydraulic composition is good, and even if the viscous soil is mixed, it has good dispersion retention, and the foaming property is low,
There is a demand for the development of an additive for a soil improvement method that does not impair the curing performance. In addition, cohesive soil means what is specified by civil engineering classification, hereinafter, when simply called clay,
Including the cohesive soil.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、水硬性組成
物と粘性土の分散性に優れ、優れた分散保持性を有する
とともに、起泡性も低く、硬化性能を損なうこともない
地盤改良工法用添加剤、該地盤改良工法用添加剤を含有
した水硬性セメント組成物並びに該水硬性セメント組成
物を用いた地盤改良工法を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention relates to a ground improvement which is excellent in dispersibility of a hydraulic composition and a viscous soil, has excellent dispersion retention properties, has low foaming properties, and does not impair hardening performance. An object of the present invention is to provide an additive for a construction method, a hydraulic cement composition containing the additive for a soil improvement method, and a ground improvement method using the hydraulic cement composition.
【０００４】[0004]
【課題を解決するための手段】本発明は、〔１〕 成分
（イ）〜（ニ）： （イ）ナフタレンスルホン酸塩ホルマリン縮合物、
（ロ）オキシカルボン酸もしくはその塩、糖及び糖アル
コールからなる群より選ばれた１種以上、（ハ）ポリエ
チレングリコール、並びに（ニ）（ポリ）オキシアルキ
レンアルキルエーテルを、成分（イ）１００重量部に対
して、成分（ロ）を１〜３０重量部、成分（ハ）を１〜
２０重量部、成分（ニ）を０．１〜１０重量部含有して
なる地盤改良工法用添加剤、〔２〕 前記（１）記載の
地盤改良工法用添加剤を含有してなる水硬性セメント組
成物、並びに〔３〕 前記〔２〕記載の水硬性セメント
組成物を用いる地盤改良工法に関する。Means for Solving the Problems The present invention provides [1] components (a) to (d): (a) formalin condensate of naphthalene sulfonate,
(B) at least one member selected from the group consisting of oxycarboxylic acids or salts thereof, sugars and sugar alcohols, (c) polyethylene glycol, and (d) (poly) oxyalkylene alkyl ether in an amount of 100 parts by weight of component (a) 1 to 30 parts by weight of component (b) and 1 to 3 parts by weight of component (c)
Additive for soil improvement method comprising 20 parts by weight, 0.1 to 10 parts by weight of component (d), [2] Hydraulic cement containing additive for soil improvement method according to (1) The present invention relates to a composition and a ground improvement method using the hydraulic cement composition according to [2].
【０００５】[0005]
【発明の実施の形態】本発明の地盤改良工法用添加剤
は、（イ）ナフタレンスルホン酸塩ホルマリン縮合物、
（ロ）オキシカルボン酸もしくはその塩、糖及び糖アル
コールからなる群より選ばれた１種以上、（ハ）ポリエ
チレングリコール、並びに（ニ）（ポリ）オキシアルキ
レンアルキルエーテルを含有してなる。前記（イ）〜
（ニ）を含有した本発明の地盤改良工法用添加剤を添加
したスラリー状の水硬性セメント組成物は良好な分散性
を有し、たとえ沈降物が生じても再攪拌で容易に均一な
スラリー状態を回復する。そして、粘性土が混入しても
高い分散性及び分散保持性を有する。さらに、低泡性で
硬化性能を損なうこともない。BEST MODE FOR CARRYING OUT THE INVENTION The additive for soil improvement method of the present invention comprises (a) a formalin condensate of naphthalene sulfonate,
(B) at least one selected from the group consisting of oxycarboxylic acids or salts thereof, sugars and sugar alcohols, (c) polyethylene glycol, and (d) (poly) oxyalkylene alkyl ether. (A) ~
The slurry-type hydraulic cement composition to which the additive for soil improvement method of the present invention containing (d) is added has good dispersibility, and even if sedimentation occurs, a uniform slurry can be easily obtained by re-stirring. Recover the condition. And it has high dispersibility and dispersion retention properties even when viscous soil is mixed. Furthermore, it has low foaming property and does not impair the curing performance.
【０００６】成分（イ）のナフタレンスルホン酸塩ホル
マリン縮合物は、水溶性塩が好ましい。水溶性塩として
は、ナトリウム、カリウム、カルシウム、マグネシウ
ム、アンモニウム、トリエタノールアミン等の無機塩や
有機塩等が挙げられ、これらの中ではナトリウム塩が好
ましい。本発明において、成分（イ）として好適に用い
られる市販品としては、「マイテイ１００」、「マイテ
イ１５０」（以上、花王（株）製）等が挙げられる。The formalin condensate of naphthalene sulfonate of the component (a) is preferably a water-soluble salt. Examples of the water-soluble salt include inorganic salts and organic salts such as sodium, potassium, calcium, magnesium, ammonium, and triethanolamine. Of these, the sodium salt is preferable. In the present invention, commercially available products suitably used as the component (a) include “Mighty 100” and “Mighty 150” (all manufactured by Kao Corporation).
【０００７】成分（ロ）のオキシカルボン酸としては、
グルコン酸、グルコヘプト酸、アラボン酸、リンゴ酸、
クエン酸等が挙げられ、これらの塩としては、例えば、
ナトリウム、カリウム、カルシウム、マグネシウム、ア
ンモニウム、トリエタノールアミン等の無機塩や有機塩
が挙げられる。As the oxycarboxylic acid of the component (b),
Gluconic acid, glucoheptic acid, arabonic acid, malic acid,
Citric acid and the like, and as these salts, for example,
Examples thereof include inorganic salts and organic salts such as sodium, potassium, calcium, magnesium, ammonium, and triethanolamine.
【０００８】また、糖としては、グルコース、フラクト
ース、ガラクトース、サッカロース、キシロース、アビ
トース、リポーズ、マルトース、異性化糖等の単糖類、
二糖、三糖等のオリゴ糖、デキストラン等の多糖類及び
これらを含む糖蜜類が挙げられ、糖アルコールとしては
ソルビトール等が挙げられる。[0008] Examples of sugars include monosaccharides such as glucose, fructose, galactose, saccharose, xylose, abitose, repose, maltose and isomerized sugars.
Oligosaccharides such as disaccharides and trisaccharides, polysaccharides such as dextran and molasses containing these are exemplified, and saccharides such as sorbitol are exemplified.
【０００９】成分（ロ）としては、スラリーの粘度低減
と分散保持性の点から、サッカロースが好ましい。As the component (b), saccharose is preferred from the viewpoint of reducing the viscosity of the slurry and maintaining the dispersion.
【００１０】成分（ロ）の配合量は、成分（イ）１００
重量部に対して、１〜３０重量部、好ましくは３〜２０
重量部である。The amount of component (b) is 100 parts (a).
1 to 30 parts by weight, preferably 3 to 20 parts by weight with respect to parts by weight
Parts by weight.
【００１１】成分（ハ）のポリエチレングリコールの重
量平均分子量は、５０００〜５００００が好ましく、ス
ラリーの粘度低減と分散保持性の観点から、１００００
〜３００００がより好ましい。The weight average molecular weight of the polyethylene glycol of the component (c) is preferably 5,000 to 50,000, and from the viewpoint of reducing the viscosity of the slurry and maintaining the dispersion, it is preferably 10,000 to 50,000.
-30,000 is more preferable.
【００１２】成分（ハ）の配合量は、成分（イ）１００
重量部に対して、１〜２０重量部、好ましくは３〜１０
重量部である。The amount of component (c) is 100 parts (a)
1 to 20 parts by weight, preferably 3 to 10 parts by weight based on parts by weight
Parts by weight.
【００１３】以上の成分（イ）〜（ハ）を添加した水硬
性組成物スラリーは、分散保持性に優れるものの、極め
て安定な気泡が連行され改良体の強度低下をきたすこと
から消泡剤が必要とされる。一般に、消泡剤としてはシ
リコン系や脂肪酸系が知られているが、本発明では、
（ポリ）オキシアルキレンアルキルエーテルが消泡剤と
して特に顕著な効果を奏する。The hydraulic composition slurry to which the above components (a) to (c) are added is excellent in dispersion retention, but extremely stable bubbles are entrained and the strength of the improved body is reduced, so that the defoaming agent is not used. Needed. Generally, silicone-based and fatty acid-based antifoaming agents are known, but in the present invention,
(Poly) oxyalkylene alkyl ethers have a particularly remarkable effect as an antifoaming agent.
【００１４】成分（ニ）の（ポリ）オキシアルキレンア
ルキルエーテルとしては、式（Ｉ）： Ｒ−Ｏ（ＰＯ）m （ＥＯ）n Ｈ （Ｉ） （式中、Ｒは水素原子または炭素数６〜２４のアルキル
基、アルケニル基もしくはアリール基、ＰＯはオキシプ
ロピレン基、ＥＯはオキシエチレン基、ｍ、ｎはＰＯま
たはＥＯの平均付加モル数を示し、ｍは１〜５０、ｎは
０〜５０である）で表される、オキシプロピレン基又は
オキシプロピレン基とオキシエチレン基を有する化合物
が挙げられ、好ましくは、Ｒが水素原子である（ポリ）
オキシプロピレン（ポリ）オキシエチレン等のポリオキ
シアルキレン類、Ｒが炭素数６〜１８のアルキル基であ
るアルキレンオキシド付加物が挙げられる。本発明にお
いて、成分（ニ）として好適に用いられる市販品として
は、「消泡剤Ｎｏ．８」（花王（株）製、（ポリ）オキ
シプロピレン（ｍ＝３）ラウリルエーテル）、「消泡剤
Ｎｏ．１１」（花王（株）製、ポリオキシプロピレン
（ｍ＝５）ポリオキシエチレン（ｎ＝１）ラウリルエー
テル）、「ＳＮデフォーマー１５−Ｐ」（サンノプコ社
製）等が挙げられる。As the (poly) oxyalkylene alkyl ether of the component (d), a compound represented by the formula (I): RO (PO) m (EO) n H (I) wherein R is a hydrogen atom or 6 carbon atoms To 24, an alkyl group, an alkenyl group or an aryl group, PO is an oxypropylene group, EO is an oxyethylene group, m and n are average addition moles of PO or EO, m is 1 to 50, and n is 0 to 50. Which is a compound having an oxypropylene group or an oxypropylene group and an oxyethylene group, and preferably, R is a hydrogen atom (poly)
Examples include polyoxyalkylenes such as oxypropylene (poly) oxyethylene, and alkylene oxide adducts in which R is an alkyl group having 6 to 18 carbon atoms. In the present invention, commercially available products suitably used as the component (d) include "Defoaming Agent No. 8" (manufactured by Kao Corporation, (poly) oxypropylene (m = 3) lauryl ether), "Defoaming Agent" Agent No. 11 "(manufactured by Kao Corporation, polyoxypropylene (m = 5) polyoxyethylene (n = 1) lauryl ether)," SN Deformer 15-P "(manufactured by San Nopco) and the like.
【００１５】成分（ニ）の配合量は、成分（イ）１００
重量部に対して、０．１〜１０重量部、好ましくは１〜
５重量部である。The amount of component (d) is 100 parts (a).
0.1 to 10 parts by weight, preferably 1 to 10 parts by weight,
5 parts by weight.
【００１６】本発明の地盤改良工法用添加剤には、成分
（イ）〜（ニ）以外に、一般に使用されているＡＥ剤、
ＡＥ滅水剤、高性能減水剤、遅延剤、早強剤、促進剤、
起泡剤、発泡剤、消泡剤、増粘剤、防水剤等の公知の添
加剤が配合されていてもよい。The soil improvement additive of the present invention includes, in addition to the components (a) to (d), generally used AE agents,
AE water killer, high performance water reducer, retarder, early strength agent, accelerator,
Known additives such as a foaming agent, a foaming agent, an antifoaming agent, a thickener, and a waterproofing agent may be blended.
【００１７】本発明の地盤改良工法用添加剤は、粉末
状、水溶液等の液体状のいずれの形態であってもよい。The additive for ground improvement method of the present invention may be in any form of powder or liquid such as aqueous solution.
【００１８】本発明の水硬性セメント組成物において、
地盤改良工法用添加剤の配合量は、水硬性粉体及び混和
材料の総量１００重量部に対して、０．１〜１０重量部
が好ましく、０．５〜５重量部がより好ましい。[0018] In the hydraulic cement composition of the present invention,
The compounding amount of the soil improvement method additive is preferably 0.1 to 10 parts by weight, more preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the total of the hydraulic powder and the admixture.
【００１９】さらに、本発明の水硬性セメント組成物
は、地盤をウォータージェットによって切削しながらセ
メント系硬化材を投入し、改良体とする各種ジェットグ
ラウト工法や、機械攪拌式の深層混合処理工法、ソイル
モルタル柱列壁工法等の地盤改良工法に好適に用いるこ
とができる。また、粘性土を含む土とスラリー状の水硬
性セメント組成物とを混合する際のワーカビリティーの
改善にも使用することができる。Furthermore, the hydraulic cement composition of the present invention can be prepared by various methods such as various jet grouting methods for introducing a cement-based hardening material while cutting the ground with a water jet to obtain an improved body, a mechanical mixing type deep mixing method, It can be suitably used for a soil improvement method such as a soil mortar column wall method. It can also be used to improve workability when mixing soil containing viscous soil with a slurry-type hydraulic cement composition.
【００２０】[0020]
【実施例】模擬土の製造例１ 乾燥粘土（ひさご屋社製材料）８０重量部、ベントナイ
ト（片山化学社製）２０重量部及び水６０重量部を混合
して得た粘土３０重量部と砂（君津産陸砂）７０重量部
とを混合し、模擬土とした。EXAMPLE 1 Production Example of Simulated Soil 30 parts by weight of a clay obtained by mixing 80 parts by weight of dry clay (a material manufactured by Hisagoya), 20 parts by weight of bentonite (manufactured by Katayama Chemical Co., Ltd.) and 60 parts by weight of water, and sand (Kimitsu land sand) was mixed with 70 parts by weight to obtain a simulated soil.
【００２１】実施例１〜１３、比較例１〜７ 表１に示す、セメント（普通ポルトランドセメント）、
高炉スラグ「エスメント４０００」（新日本化学社
製）、該セメント及び高炉スラグの総量と同重量部の
水、成分（イ）〜（ニ−２）： （イ） ：「マイテイ１００」（花王（株）製） （ロ−１）：サッカロース（片山化学社製） （ロ−２）：グルコン酸ナトリウム（和光純薬社製） （ハ） ：ポリエチレングリコール（和光純薬社製、
分子量：１３０００） （ニ−１）：「消泡剤Ｎｏ．８」（花王（株）製） （ニ−２）：「ＳＮデフォーマー１５−Ｐ」（サンノプ
コ社製） からなる地盤改良工法用添加剤を混合し、スラリー状の
水硬性セメント組成物を得た。Examples 1 to 13 and Comparative Examples 1 to 7 Cement (ordinary Portland cement) shown in Table 1
Blast furnace slag "Esment 4000" (manufactured by Shin Nippon Chemical Co., Ltd.), the same amount of water as the total amount of the cement and the blast furnace slag, components (a) to (d-2): (a): "Mighty 100" (Kao ( (B-1): Saccharose (Katayama Chemical) (b-2): Sodium gluconate (Wako Pure Chemical) (c): Polyethylene glycol (Wako Pure Chemical)
(Molecular weight: 13000) (d-1): "Defoaming agent No. 8" (manufactured by Kao Corporation) (d-2): "SN deformer 15-P" (manufactured by San Nopco) Addition for ground improvement method The agents were mixed to obtain a hydraulic cement composition in the form of a slurry.
【００２２】[0022]
【表１】 [Table 1]
【００２３】〔水硬性セメント組成物の再分散性〕水硬
性セメント組成物を調製してから１時間経過後、容器
（直径５ｃｍ、高さ４０ｃｍ）にスラリー状の水硬性セ
メント組成物を２５ｃｍの高さに入れて上下に１０回振
とうして、沈降物の有無を目視にて観察し、沈降物が生
じないものを「○」、生じるものを「×」とする。結果
を表２に示す。[Redispersibility of Hydraulic Cement Composition] One hour after the preparation of the hydraulic cement composition, a 25 cm slurry-type hydraulic cement composition was placed in a container (diameter 5 cm, height 40 cm). It is placed in the height and shakes up and down 10 times, and the presence or absence of a sediment is visually observed. Table 2 shows the results.
【００２４】水硬性セメント組成物５００重量部と模擬
土１０００重量部とを、４枚羽根突き攪拌機により、５
００ｒ／ｍｉｎで３分間攪拌した後、得られたスラリー
の初期粘度、分散保持性、硬化性及び起泡性を以下の方
法に従い、評価した。結果を表２に示す。500 parts by weight of the hydraulic cement composition and 1000 parts by weight of the simulated soil were mixed with a 4-blade stirrer to obtain 5 parts.
After stirring at 00 r / min for 3 minutes, the initial viscosity, dispersion retention, curability and foaming properties of the obtained slurry were evaluated according to the following methods. Table 2 shows the results.
【００２５】〔初期粘度及び分散保持性〕スラリー調製
直後の粘度をＢ型粘度計（東京計器製造所製）を用い、
６ｒ／ｍｉｎで粘度（初期粘度）を測定した。次いで、
１時間経過後、再度、同条件にて粘度を測定し、分散保
持性を評価した。分散保持性は、初期粘度に対する１時
間後の粘度の比（１時間後の粘度／初期粘度×１００）
が、１００±２０％未満のものを「○」、１２０％以上
のものを「×」とする。[Initial viscosity and dispersion retention] The viscosity immediately after preparing the slurry was measured using a B-type viscometer (manufactured by Tokyo Keiki Seisakusho).
The viscosity (initial viscosity) was measured at 6 r / min. Then
One hour later, the viscosity was measured again under the same conditions, and the dispersion retention was evaluated. The dispersion retention is the ratio of the viscosity after 1 hour to the initial viscosity (viscosity after 1 hour / initial viscosity × 100).
However, those with less than 100 ± 20% are marked with “○” and those with 120% or more are marked with “x”.
【００２６】〔硬化性〕スラリー調製から２４時間静置
後、スラリーに５ｋｇ／ｃｍ2 の荷重をかけ、変形の有
無を目視により観察し、変形しないものを「○」、変形
するものを「×」とする。[Curability] After the slurry was allowed to stand for 24 hours, a load of 5 kg / cm 2 was applied to the slurry, and the presence or absence of deformation was visually observed. ".
【００２７】〔起泡性〕スラリー調製直後、模擬土スラ
リー５０ｍｌを１００ｍｌ容のメスシリンダーに入れ、
上下に５０回振とうし、生じた泡を含めた全容積を測定
し、５０ｍｌに対する容積％を示す。[Foamability] Immediately after preparing the slurry, 50 ml of the simulated soil slurry was placed in a 100 ml measuring cylinder.
Shake up and down 50 times, measure the total volume including the generated foam, and indicate the volume% to 50 ml.
【００２８】[0028]
【表２】 [Table 2]
【００２９】以上の結果から、比較例１〜７と対比し
て、実施例１〜１３のスラリー状の水硬性セメント組成
物は分散性に優れ、さらに粘土が混入しても分散保持
性、硬化性を損なうことなく、かつ起泡性も低いことが
分かる。From the above results, in comparison with Comparative Examples 1 to 7, the slurried hydraulic cement compositions of Examples 1 to 13 are excellent in dispersibility, and even when clay is mixed, the dispersion retention and hardening properties are improved. It can be seen that the foamability is low without impairing the foamability.
【００３０】[0030]
【発明の効果】本発明の地盤改良工法用添加剤は、水硬
性組成物と粘性土の分散性に優れ、優れた分散保持性を
有するとともに、起泡性も低く、硬化性能を損なうこと
もない。従って、該地盤改良工法用添加剤を含有した水
硬性セメント組成物を用いることにより、作業効率よく
地盤改良工法を行なうことが可能となった。EFFECTS OF THE INVENTION The additive for soil improvement method of the present invention is excellent in dispersibility of a hydraulic composition and a viscous soil, has excellent dispersion retention properties, has low foaming properties, and may impair curing performance. Absent. Therefore, by using the hydraulic cement composition containing the soil improvement method additive, the soil improvement method can be performed with high working efficiency.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｃ０９Ｋ 103:00 Ｃ０９Ｋ 103:00 (72)発明者 脇山 哲也 東京都千代田区神田錦町１−８ ＯＰビル 住友大阪セメント株式会社東京支店内 (72)発明者 横尾 一 大阪市大正区南恩加島７−１−55 住友大 阪セメント株式会社セメント・コンクリー ト研究所内 (72)発明者 下田 政朗 和歌山市湊1334番地 花王株式会社研究所 内 (72)発明者 倭 富士桜 和歌山市湊1334番地 花王株式会社研究所 内 (72)発明者 小幡 憲一 大阪市西区立売堀１−４−１ 花王株式会 社大阪事業所内 Ｆターム(参考） 2D040 AB03 AB05 AC04 BD03 CA01 CA10 CB03 4H026 CA01 CB08 CC05 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification FI FI Theme Court ゛ (Reference) // C09K 103: 00 C09K 103: 00 (72) Inventor Tetsuya Wakiyama 1-8 Kandanishikicho, Chiyoda-ku, Tokyo OP Building Sumitomo Osaka Cement Co., Ltd. Tokyo Branch (72) Inventor Kazu Yokoo 7-1-55 Minamienkajima Taisho-ku, Osaka City Sumitomo Osaka Cement Co., Ltd. Cement Concrete Research Laboratory (72) Inventor Masaro Shimoda Wakayama 1334 Minato, Kao Corporation Research Institute (72) Inventor Yamato Fuji Sakura 1334 Minato, Wakayama City Kao Corporation Research Institute (72) Inventor Kenichi Obata 1-4-1 Nishi-ku, Nishi-ku, Osaka Kao Corporation Osaka Business In-house F-term (reference) 2D040 AB03 AB05 AC04 BD03 CA01 CA10 CB03 4H026 CA01 CB08 CC05
Claims (4)
（ロ）オキシカルボン酸もしくはその塩、糖及び糖アル
コールからなる群より選ばれた１種以上、（ハ）ポリエ
チレングリコール、並びに（ニ）（ポリ）オキシアルキ
レンアルキルエーテルを、成分（イ）１００重量部に対
して、成分（ロ）を１〜３０重量部、成分（ハ）を１〜
２０重量部、成分（ニ）を０．１〜１０重量部含有して
なる地盤改良工法用添加剤。1. Components (a) to (d): (a) formalin condensate of naphthalene sulfonate,
(B) at least one member selected from the group consisting of oxycarboxylic acids or salts thereof, sugars and sugar alcohols, (c) polyethylene glycol, and (d) (poly) oxyalkylene alkyl ether in an amount of 100 parts by weight of component (a) 1 to 30 parts by weight of component (b) and 1 to 3 parts by weight of component (c)
An additive for a soil improvement method comprising 20 parts by weight and 0.1 to 10 parts by weight of the component (d).
１記載の地盤改良工法用添加剤。2. The additive for a ground improvement method according to claim 1, wherein the component (b) is saccharose.
加剤を含有してなる水硬性セメント組成物。3. A hydraulic cement composition comprising the additive for ground improvement method according to claim 1 or 2.
用いる地盤改良工法。4. A ground improvement method using the hydraulic cement composition according to claim 3.
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| JP2000188652A JP3502595B2 (en) | 2000-06-23 | 2000-06-23 | Additive for ground improvement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000188652A JP3502595B2 (en) | 2000-06-23 | 2000-06-23 | Additive for ground improvement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002003843A true JP2002003843A (en) | 2002-01-09 |
| JP3502595B2 JP3502595B2 (en) | 2004-03-02 |
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ID=18688406
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009035453A (en) * | 2007-08-02 | 2009-02-19 | Takenaka Komuten Co Ltd | Method for fluidizing soil cement slurry |
| JP2012149503A (en) * | 2010-12-28 | 2012-08-09 | Waseda Univ | Soil improvement method and management method for the same |
| JP5861207B2 (en) * | 2010-11-10 | 2016-02-16 | ライオン・スペシャリティ・ケミカルズ株式会社 | Soil conditioner composition |
| JP2018177896A (en) * | 2017-04-07 | 2018-11-15 | 花王株式会社 | Improvement method of foundation |
-
2000
- 2000-06-23 JP JP2000188652A patent/JP3502595B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009035453A (en) * | 2007-08-02 | 2009-02-19 | Takenaka Komuten Co Ltd | Method for fluidizing soil cement slurry |
| JP5861207B2 (en) * | 2010-11-10 | 2016-02-16 | ライオン・スペシャリティ・ケミカルズ株式会社 | Soil conditioner composition |
| JP2012149503A (en) * | 2010-12-28 | 2012-08-09 | Waseda Univ | Soil improvement method and management method for the same |
| JP2018177896A (en) * | 2017-04-07 | 2018-11-15 | 花王株式会社 | Improvement method of foundation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3502595B2 (en) | 2004-03-02 |
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