JP3283171B2 - Chemical liquid for ground injection - Google Patents
Chemical liquid for ground injectionInfo
- Publication number
- JP3283171B2 JP3283171B2 JP34503595A JP34503595A JP3283171B2 JP 3283171 B2 JP3283171 B2 JP 3283171B2 JP 34503595 A JP34503595 A JP 34503595A JP 34503595 A JP34503595 A JP 34503595A JP 3283171 B2 JP3283171 B2 JP 3283171B2
- Authority
- JP
- Japan
- Prior art keywords
- water glass
- aluminum
- aluminate
- salt
- alkali metal
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
Description
【０００１】[0001]
【発明の属する技術分野】本発明は地盤中に注入して該
地盤を固結する水ガラス系地盤注入用薬液に係り、特
に、短時間から長時間にわたる広範囲のゲル化時間の調
整が容易で、かつ、水ガラス濃度が比較的低いにもかか
わらず、高強度を呈し、かつ、浸透性、止水性、および
耐久性にも優れた地盤注入用薬液に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water glass-based injection liquid for solidifying the ground by injecting it into the ground, and in particular, it is easy to adjust the gelling time over a wide range from a short time to a long time. Also, the present invention relates to a chemical for injecting ground, which exhibits high strength in spite of a relatively low water glass concentration, and also has excellent permeability, waterproofness, and durability.
【０００２】[0002]
【従来の技術】地盤を固結するための水ガラス系地盤注
入用薬液として、水ガラスと、反応剤としてのアルミン
酸ソーダとを含む薬液が知られている。（特公昭２６−
６６３０号公報参照）。2. Description of the Related Art As a water glass-based soil injection chemical for consolidating the ground, a chemical containing water glass and sodium aluminate as a reactant is known. (Special Publication 26-
No. 6630).
【０００３】上述の公知薬液において、薬液の浸透性を
よくするためには、粘性を低くし、かつ、ゲル化時間を
長くしなければならない。粘性を低くするには水ガラス
の濃度を下げなければならず、また、ゲル化時間を長く
するには反応剤であるアルミン酸ソーダの量を少なくし
なければならない。In the above-mentioned known chemical solutions, in order to improve the permeability of the chemical solution, it is necessary to lower the viscosity and to prolong the gelation time. To lower the viscosity, the concentration of water glass must be reduced, and to increase the gelation time, the amount of sodium aluminate as a reactant must be reduced.
【０００４】このことは同時に、固結強度の大巾な低下
をもたらし、かつ、未反応水ガラスがゲル化後に溶出し
て、ゲルの収縮、すなわち大きなシネリシス（離漿性）
をもたらし、この結果、止水性の低下のみならず、耐久
性の低下をももたらす。At the same time, this leads to a considerable reduction in the consolidation strength, and the unreacted water glass elutes after gelation, causing shrinkage of the gel, ie a large syneresis.
As a result, not only the water stoppage is reduced but also the durability is reduced.
【０００５】上述のアルミン酸ソーダを反応剤として用
いることによる欠点を改善するために、水ガラス（市販
３号品、比重1.４２）を50〜30％（容量比）、アルミン
酸ソーダ（比重1.３９）を５〜15％（容量比）の範囲内
でゲル化時間を調整することも提案されている。（特公
昭４４−２８５３５号公報参照）。また、アルミン酸ソ
ーダに加えて水溶性脂肪族アルデヒドの併用（特公昭５
４−２２６８７号公報参照）、リン酸類あるいは塩基性
アルミニウム塩の併用（特公昭５６−１２９２８９号公
報参照）、セメント、リンゴ酸、グルコン酸等の併用
（特公昭５９−６２６８９号公報参照）等の技術も知ら
れている。In order to remedy the disadvantages caused by using sodium aluminate as a reactant, 50-30% (volume ratio) of water glass (commercially available No. 3 product, specific gravity 1.42) and sodium aluminate (specific gravity) were used. It has also been proposed to adjust the gel time within the range of 1.39) to 5 to 15% (by volume). (See Japanese Patent Publication No. 44-28535). Further, in addition to sodium aluminate, a water-soluble aliphatic aldehyde is used in combination (Japanese Patent Publication No.
No. 4,226,687), combined use of phosphoric acids or basic aluminum salts (see Japanese Patent Publication No. 56-129289), combined use of cement, malic acid, gluconic acid, etc. (see Japanese Patent Publication No. 59-62689). The technology is also known.
【０００６】しかし、これらの改良技術では瞬結から緩
結領域の広範囲にわたるゲル化時間の調整、高固結強度
の発現、止水性、耐久性の改善等には必ずしも充分では
ない。[0006] However, these improved techniques are not necessarily sufficient for adjusting the gel time over a wide range from the instantaneous setting to the loose setting region, exhibiting a high consolidation strength, improving the water stopping performance and the durability.
【０００７】[0007]
【発明が解決しようとする課題】そこで、本発明の目的
は水ガラスの反応剤としてのアルミン酸のアルカリ金属
塩を改良し、瞬結から緩結に至る広範囲のゲル化時間の
調整が容易であり、かつ、水ガラス濃度が比較的低いに
もかかわらず、高い固結強度を呈し、さらに、浸透性、
止水性および耐久性にも優れ、前述の公知技術に存する
欠点をさらに改良した地盤注入用薬液を提供することに
ある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve an alkali metal salt of aluminate as a reactant for water glass so that the gelation time can be easily adjusted over a wide range from instantaneous setting to slow setting. Yes, and despite the relatively low concentration of water glass, exhibit high consolidation strength,
It is an object of the present invention to provide a liquid for ground injection which is excellent in waterproofness and durability and further improves the above-mentioned disadvantages of the known art.
【０００８】[0008]
【課題を解決するための手段】上述の目的を達成するた
め、本発明の地盤注入用薬液によれば、水ガラスと、ア
ルミン酸のアルカリ金属塩と、加水分解して酸性を呈す
るアルミニウム塩とからなることを特徴とし、特に、上
述の各成分が次の（１）〜（５）に定められる条件を満
足するものであることを特徴とする。In order to achieve the above-mentioned object, according to the chemical solution for ground injection of the present invention, water glass, an alkali metal salt of aluminate, and an aluminum salt which is hydrolyzed to exhibit acidity are provided. In particular, each of the above-mentioned components satisfies the conditions defined in the following (1) to (5).
【０００９】（１）水ガラスのモル比が２．８以上。 （２）水ガラスのＳｉＯ２濃度が全配合液中の５〜９重
量／容量％。 （３）アルミン酸のアルカリ金属塩と加水分解して酸性
を呈するアルミニウム塩との合計量がＡｌ２Ｏ３に換算
して全配合液中０．５〜１．６重量／容量％。 （４）アルミン酸のアルカリ金属塩のＡｌ２Ｏ３換算量
／加水分解して酸性を呈するアルミニウム塩のＡｌ ２ Ｏ
３ 換算量＞３．０。 （５）アルミン酸のアルカリ金属塩のＡｌ ２ Ｏ ３ 換算量
＋加水分解して酸性を呈するアルミニウム塩のＡｌ ２ Ｏ
３ 換算量／水ガラスのＳｉＯ ２ 量×１００＝７〜２５
％。 (1) The molar ratio of water glass is 2.8 or more. (2) The water glass has an SiO 2 concentration of 5 to 9% by weight / volume in the total liquid mixture. (3) the total amount of aluminum salts showing acidity by hydrolysis and alkali metal salts of aluminate in terms of Al 2 O 3 the total formulation solution 0.5 to 1.6 weight / volume%. (4) Al 2 O 3 equivalent amount of alkali metal aluminate / Al 2 O of aluminum salt which exhibits acidity by hydrolysis
3 conversion amount> 3.0. (5) Al 2 O 3 equivalent of alkali metal salt of aluminate
+ Al 2 O of aluminum salt which is acidic by hydrolysis
3 conversion amount / SiO 2 amount of water glass × 100 = 7 to 25
%.
【００１０】[0010]
【発明の実施の形態】以下、本発明を具体的に詳述す
る。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
【００１１】本発明に用いられる水ガラスはモル比が2.
８以上で、ＳｉＯ2 濃度が全配合液中の５〜９重量／容
量％、好ましくは６〜８重量／容量％である。モル比が
2.８以下では固結後に充分な強度を呈し得ず、また、Ｓ
ｉＯ2 濃度が５重量／容量％以下ではゲル化時間が長す
ぎて短時間の調整が不可能であるのみならず、固結強度
も小さく、また、９重量／容量％以上ではゲル化時間が
短すぎて長時間の調整が不可能であるのみならず、固結
強度も小さい。The water glass used in the present invention has a molar ratio of 2.
When it is 8 or more, the SiO 2 concentration is 5 to 9% by weight / volume, preferably 6 to 8% by weight / volume in the total liquid mixture. Molar ratio
If it is less than 2.8, sufficient strength cannot be exhibited after consolidation.
When the concentration of iO 2 is 5% by weight or less, the gelling time is too long to adjust in a short time, and the compaction strength is low. Not only is it too short to adjust for a long time, but also the compaction strength is low.
【００１２】また、本発明に用いられるアルミン酸のア
ルカリ金属塩は水ガラスの反応剤、すなわち硬化剤であ
って、具体的にはアルミン酸ナトリウム、アルミン酸カ
リウム等が挙げられる。The alkali metal aluminate used in the present invention is a water glass reactant, that is, a curing agent, and specific examples thereof include sodium aluminate and potassium aluminate.
【００１３】さらに、本発明に用いられる加水分解して
酸性反応を呈するアルミニウム塩は上述アルミン酸アル
カリ塩の水ガラスの反応剤としての欠点を補って、本発
明の後述する効果を奏ぜしめるものであって、本発明の
最も特徴とする成分である。以下、この成分を本発明で
は酸性アルミニウム塩と称する。Furthermore, the aluminum salt used in the present invention, which exhibits an acidic reaction upon hydrolysis, compensates for the above-mentioned disadvantages of the alkali aluminate as a reactant for water glass, and provides the following effects of the present invention. Which is the most characteristic component of the present invention. Hereinafter, this component is referred to as an acidic aluminum salt in the present invention.
【００１４】上述の酸性アルミニウム塩は加水分解して
酸性反応を呈するアルミニウム塩であって、具体的に
は、硫酸アルミニウム（Ａｌ2(ＳＯ4)Ｏ3)、塩化アルミ
ニウム（ＡｌＣｌ3)、硝酸アルミニウム（Ａｌ（ＮＯ3)
3)、ミョウバン類（Ｋ2 ＳＯ4・Ａｌ2(ＳＯ4)3 ・24Ｈ
2 Ｏ、アンモニウムミョウバン、ナトリウムミョウバン
等）等が挙げられる。The above-mentioned acidic aluminum salt is an aluminum salt which exhibits an acidic reaction upon hydrolysis, and specifically includes aluminum sulfate (Al 2 (SO 4 ) O 3 ), aluminum chloride (AlCl 3 ), aluminum nitrate (Al (NO 3 )
3 ), alums (K 2 SO 4 .Al 2 (SO 4 ) 3 .24H
2 O, ammonium alum, sodium alum, etc.).
【００１５】本発明にかかる上述３成分、すなわち、水
ガラス、アルミン酸アルカリ金属塩および酸性アルミニ
ウム塩の配合量はそれぞれ次の（ａ）〜（ｃ）に示され
る三つの条件を同時に満たす量であることが好ましい。The above three components according to the present invention, that is, the amounts of water glass, alkali metal aluminate and acidic aluminum salt, are each such that the following three conditions (a) to (c) are simultaneously satisfied. Preferably, there is.
【００１６】（ａ）アルミン酸のアルカリ塩と酸性アル
ミニウム塩との合計量がＡｌ2 Ｏ3 に換算して全配合液
中0.５〜1.６重量／容量％である。この値が0.５重量／
容量％以下では、ゲル化時間が24時間以上となって短い
方のゲル化時間の調整が難しくなり、しかも固結強度も
小さくなる。また、1.６重量／容量％以上では、瞬結と
なってしまい、長い方のゲル化時間の調整が難しくな
り、かつ、固結強度も小さい。(A) The total amount of the alkali aluminate and the acidic aluminum salt is 0.5 to 1.6% by weight / volume in the total mixture in terms of Al 2 O 3 . This value is 0.5 weight /
When the content is less than the volume%, the gelation time becomes 24 hours or more, and it is difficult to adjust the shorter gelation time, and the consolidation strength is reduced. On the other hand, if the content is 1.6% by weight or more, instantaneous setting occurs, and it is difficult to adjust the longer gelation time, and the consolidation strength is low.
【００１７】（ｂ）アルミン酸アルカリ金属塩のＡｌ２
Ｏ３換算量（重量）／酸性アルミニウム塩のＡｌ ２ Ｏ ３
換算量（重量）の値が３以上、好ましくは３〜１０であ
る。この値が１０以上になっても効果上、特別な変化は
なく、あるいは若干、強度低下の傾向を示す。(B) Al 2 of alkali metal aluminate
O 3 equivalent (weight) / Al 2 O 3 of acidic aluminum salt
The value of the reduced amount (weight) is 3 or more, preferably 3 to 10. Even if this value is 10 or more, there is no particular change in the effect, or the strength tends to slightly decrease.
【００１８】（ｃ）アルミン酸アルカリ金属塩のＡｌ2
Ｏ3 換算量（重量）と酸性アルミニウム塩のＡｌ2 Ｏ3
換算量（重量）との和を水ガラスのＳｉＯ2 量（重量）
で割り、１00を掛けた値が７〜25％である。この値が７
％以下では、ゲル化時間が長すぎて短い方のゲル化時間
の調整が困難になり、かつ、固結強度も低下する。ま
た、25％以上では、ゲル化時間が短すぎて長い方のゲル
化時間の調整が困難になる。(C) Al 2 of alkali metal aluminate
O 3 conversion amount (weight) and Al 2 O 3 of acidic aluminum salt
The sum of the converted amount (weight) and the amount of SiO 2 in water glass (weight)
Divided by 100 and multiplied by 100 is 7 to 25%. This value is 7
%, The gelation time is too long and it is difficult to adjust the shorter gelation time, and the consolidation strength also decreases. If it is 25% or more, the gelation time is too short and it is difficult to adjust the longer gelation time.
【００１９】上述の本発明にかかる地盤注入用薬液は水
ガラスとアルミン酸アルカリ金属塩の系にさらに酸性ア
ルミニウム塩を含有して構成されるから、瞬結から緩結
に至るゲル化時間の調整が容易であるのみならず、固結
強度にも優れ、さらに、浸透性にも優れ、強いては止水
性、耐久性の向上が期待できる。Since the above-mentioned chemical solution for injecting ground according to the present invention is constituted by further containing an acidic aluminum salt in a system of water glass and an alkali metal aluminate, adjustment of the gelation time from instantaneous setting to loosening. Not only is it easy to perform, but also excellent in consolidation strength, excellent in permeability, and improvement of water stoppage and durability can be expected.
【００２０】 これは以下の作用によるものと思われ
る。すなわち、一般に、水ガラスとアルミン酸アルカリ
金属塩の系では、水ガラスと、他の無機系反応剤の系に
比べるとゲル化時間が短く、特に夏場ではゲル化の調整
が難しく、さらに、シネリシスが大きく、かつ強度的に
も軟弱である。This is thought to be due to the following effects. That is, in general, the gelation time is shorter in the system of water glass and alkali metal aluminate than in the system of water glass and other inorganic reactants.
Is difficult, the syneresis is large, and the strength is soft.
【００２１】これに対して、上述の水ガラスとアルミン
酸アルカリ金属塩の系に酸性アルミニウム塩を添加する
と、緩衝作用が生じるゲル化時間の緩慢な変化が一層助
長され、浸透性が良くなる。しかも、酸性アルミニウム
塩は配合液中で酸性を呈して水ガラスのアルカリ分を中
和し、かつ、シネリシスを抑制し、さらに、固結強度の
向上をももたらすものと思われる。On the other hand, when an acidic aluminum salt is added to the above-mentioned system of water glass and alkali metal aluminate, a slow change in the gelation time at which a buffer action occurs is further promoted, and the permeability is improved. In addition, it is considered that the acidic aluminum salt exhibits acidity in the mixed solution to neutralize the alkali content of the water glass, suppresses syneresis, and further improves the consolidation strength.
【００２２】[0022]
【発明の実施例】以下、本発明を実施例によって詳述す
るが、本発明はこれらの実施例に限定されるものではな
い。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples.
【００２３】１．使用材料 （１）水ガラス 表１に示す組成からなる３種類のモル比の異なる水ガラ
スを使用した。1. Materials Used (1) Water Glass Three types of water glass having the compositions shown in Table 1 and having different molar ratios were used.
【００２４】[0024]
【表１】 [Table 1]
【００２５】（２）アルミン酸のアルカリ金属塩 Ａｌ2 Ｏ3 として１9.３％を含有する比重1.４６８のア
ルミン酸ソーダ溶液を使用した。(2) Alkali metal aluminate A sodium aluminate solution having a specific gravity of 1.468 and containing 19.3% as Al 2 O 3 was used.
【００２６】（３）酸性アルミニウム塩 Ａｌ2 Ｏ3 として8.１％を含有する比重1.２７３の硫酸
アルミニウム溶液を使用した。(3) Acidic aluminum salt An aluminum sulfate solution having a specific gravity of 1.273 and containing 8.1% as Al 2 O 3 was used.
【００２７】２．配合 表１に示される水ガラスの水溶液を表２のＡ液として調
製し、さらに、前記アルミン酸ソーダおよび硫酸アルミ
ニウムの混合水溶液を表２のＢ液として調製し、これら
ＡＢ液の合流液について、ゲル化時間および豊浦標準砂
によるサンドゲルの一軸圧縮強度(kgf/cm2) を測定し、
結果を表２に示した。表２において、ゲル化時間はカッ
プ倒立法、一軸圧縮強度は土質工学会基準「土の一軸圧
縮試験方法」に従って測定した。なお、表２中の W/V％
は重量／容量％を意味する。2. Formulation An aqueous solution of water glass shown in Table 1 was prepared as a liquid A in Table 2, and a mixed aqueous solution of the sodium aluminate and aluminum sulfate was prepared as a liquid B in Table 2; Measure the gelling time and uniaxial compressive strength (kgf / cm 2 ) of sand gel with Toyoura standard sand,
The results are shown in Table 2. In Table 2, the gel time was measured according to the cup inversion method, and the uniaxial compressive strength was measured according to the Japanese Society of Geotechnical Engineers “Uniaxial compressive test method for soil”. W / V% in Table 2
Means weight / volume%.
【００２８】[0028]
【表２】[Table 2]
【００２９】表２の実験例NO.1〜22はいずれも本発明に
かかる例であって、この表２からわかるように瞬結から
１時間以上のゲル化時間の配合液が容易に得られ、か
つ、固結強度もほぼ２〜５kgf/cm2 の一軸圧縮強度を示
している。また、水ガラス濃度が通常の水ガラスグラウ
トと比べて低濃度であるにもかかわらず、相当に大きな
固結強度を呈している。The experimental examples Nos. 1 to 22 in Table 2 are all examples according to the present invention. As can be seen from Table 2, a compounded liquid having a gelation time of 1 hour or more from the instantaneous setting can be easily obtained. The compaction strength also shows a uniaxial compression strength of about 2 to 5 kgf / cm 2 . In addition, despite the fact that the water glass concentration is lower than that of ordinary water glass grout, it exhibits a considerably large consolidation strength.
【００３０】また、表２の実験例１〜10、19〜22はいず
れも、(1) 水ガラスのモル比が2.８以上であり、(2) Ｓ
ｉＯ2 濃度が全配合液中の５〜９重量／容量％の範囲内
であり、(3) アルミン酸のアルカリ金属塩と酸性アルミ
ニウム塩との合計量がＡｌ2Ｏ3 に換算して全配合液中
0.５〜1.６重量／容量％であり、(4) アルミン酸アルカ
リ金属塩のＡｌ2 Ｏ3 換算量／酸性アルミニウム塩のＡ
ｌ2 Ｏ3 換算量の値が3.０よりも大きく、(5) アルミン
酸アルカリ金属塩のＡｌ2 Ｏ3 換算量＋酸性アルミニウ
ム塩のＡｌ2 Ｏ3 換算量／水ガラスのＳｉＯ2 量×１00
の値が７〜25％の範囲内であって、これら(1) 〜(5) の
条件を満たしている。この場合、ゲル化時間の調整は容
易であり、かつ、固結強度もほぼ３〜５kgf/cm2 の範囲
内にあり、一段と優れている。In all of Experimental Examples 1 to 10 and 19 to 22 in Table 2, (1) the molar ratio of water glass was 2.8 or more, and (2) S
iO 2 concentration is in the range of 5 to 9% by weight / volume% in the total blended liquid, and (3) the total amount of alkali metal aluminate and acidic aluminum salt is converted to Al 2 O 3 In the liquid
(4) Al 2 O 3 equivalent of alkali metal aluminate / A of acidic aluminum salt
The value of l 2 O 3 in terms of the amount is greater than 3.0, (5) in terms of Al 2 O 3 amount of alkali metal aluminates + acidic aluminum in terms of Al 2 O 3 amount / of water glass SiO 2 amount × salt 100
Is within the range of 7 to 25%, and satisfies the conditions (1) to (5). In this case, the adjustment of the gel time is easy, and the consolidation strength is substantially in the range of 3 to 5 kgf / cm 2 , which is much better.
【００３１】実験例19〜20はアルミン酸ソーダ（Ａｌ2
Ｏ3 換算) ／硫酸アルミニウム（Ａｌ2 Ｏ3 換算）の値
を3.０以上に徐々に高めた例であって、10付近までいず
れも優れた効果を示しているが、10を越えるとやや強度
低下の傾向を示す。（実験例21、22) 。In Experimental Examples 19 to 20, sodium aluminate (Al 2
This is an example in which the value of (O 3 conversion) / aluminum sulfate (Al 2 O 3 conversion) is gradually increased to 3.0 or more, and all show excellent effects up to around 10; It shows a tendency of strength reduction. (Experimental Examples 21 and 22).
【００３２】比較例１〜10は水ガラスの硬化剤としてア
ルミン酸ソーダを単独で使用した例であり、比較例11、
12は硫酸アルミニウムを単独で使用した例であって、い
ずれも固結強度が0.５〜1.６kgf/cm2 程度であって、相
当に低い値を示している。また、比較例11、12では、Ａ
Ｂ液の合流時に沈澱が発生し、均質な液となりにくい。Comparative Examples 1 to 10 are examples in which sodium aluminate was used alone as a curing agent for water glass.
Numeral 12 is an example in which aluminum sulfate was used alone, and all had a consolidation strength of about 0.5 to 1.6 kgf / cm 2 , which is a considerably low value. In Comparative Examples 11 and 12, A
Precipitation occurs when the B liquids join, and it is difficult to obtain a homogeneous liquid.
【００３３】図１は表２の実験例１〜５および比較例１
〜５について、アルミン酸ソーダ溶液(ml)とゲル化時間
（分）との関係を示したグラフであって、実線は実験例
１〜５、破線は比較例１〜５を示す。FIG. 1 shows Experimental Examples 1 to 5 and Comparative Example 1 in Table 2.
5 is a graph showing the relationship between the sodium aluminate solution (ml) and the gelation time (minutes), wherein the solid line indicates Experimental Examples 1 to 5 and the broken line indicates Comparative Examples 1 to 5.
【００３４】図１から、実験例１〜５は比較例１〜５と
比較してゲル化時間曲線の傾斜が非常に緩やかで、短時
間から長時間にわたるゲル化時間の調整が容易であるこ
とが伺える。From FIG. 1, it can be seen that the slopes of the gelation time curves of Experimental Examples 1 to 5 are very gentle compared to Comparative Examples 1 to 5, and the adjustment of the gelation time from a short time to a long time is easy. Can be heard.
【００３５】なお、実験例１〜５では配合液はいずれ
も、ゲル化直前まで比較的低粘性であった。したがっ
て、本発明薬液は瞬結領域から、浸透性が要求される領
域まで広範囲に調製可能である。In Experimental Examples 1 to 5, all of the blended liquids had a relatively low viscosity until immediately before gelation. Therefore, the drug solution of the present invention can be prepared in a wide range from a flashing region to a region where permeability is required.
【００３６】さらに本発明の実験例では、固結体の離漿
水が比較例に比べて非常に少なく、このため、止水性、
耐久性にも優れている。Further, in the experimental example of the present invention, the amount of syneresis water of the solidified substance was very small as compared with the comparative example.
Also has excellent durability.
【００３７】なお、上述の表２ではアルミン酸アルカリ
金属塩としてアルミン酸ソーダおよび酸性アルミニウム
塩として硫酸アルミニウムの例をそれぞれ示したが、ア
ルミン酸ソーダの他にアルミン酸カリ、硫酸アルミニウ
ムの他に塩化アルミニウム、硝酸アルミニウム、ミョウ
バン類をそれぞれ用いても同様な傾向を示す。In Table 2 above, examples of sodium aluminate as an alkali metal aluminate and aluminum sulfate as an acidic aluminum salt are shown. However, in addition to sodium aluminate, potassium aluminate, aluminum sulfate and chloride are also used. A similar tendency is exhibited when aluminum, aluminum nitrate, and alum are used.
【００３８】[0038]
【発明の効果】以上のとおり、本発明にかかる地盤注入
用薬液は水ガラスの反応剤としてアルミン酸アルカリ金
属塩および酸性アルミニウム塩を併せて用いることによ
り、次の効果を奏し得るものである。As described above, the chemical solution for ground injection according to the present invention can provide the following effects by using an alkali metal aluminate salt and an acidic aluminum salt together as a reactant for water glass.
【００３９】（１）水ガラス濃度を通常の水ガラスグラ
ウトよりも比較的低濃度にしても、高固結強度を呈し得
る。 （２）短時間から長時間にわたるゲル化時間の調整が容
易で、かつ、ゲル化に至るまで低粘性を保持するので、
瞬結から浸透性が要求される緩結に至る広範囲の水ガラ
スグラウトを得ることができる。 （３）固結強度が高い。 （４）離漿水が少ないので、止水性、耐久性の向上が期
待できる。(1) Even when the water glass concentration is relatively lower than that of ordinary water glass grout, high consolidation strength can be exhibited. (2) It is easy to adjust the gel time from a short time to a long time, and it maintains low viscosity until gelation.
It is possible to obtain a wide range of water glass grout from instantaneous setting to loosening requiring permeability. (3) High consolidation strength. (4) Since there is little syneresis water, improvement in water stoppage and durability can be expected.
【図１】図１は表２の実験例１〜５および比較例１〜５
について、アルミン酸ソーダ溶液(ml)とゲル化時間
（分）との関係を示したグラフである。FIG. 1 shows experimental examples 1 to 5 and comparative examples 1 to 5 in Table 2.
3 is a graph showing the relationship between a sodium aluminate solution (ml) and a gelation time (minutes).
【表２】 [Table 2]
【表２】 [Table 2]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 栢原 健二 東京都文京区本郷２−15−10 強化土エ ンジニヤリング株式会社内 (72)発明者 木嶋 正 千葉県船橋市西浦３−４−３ 富士化学 株式会社内 (56)参考文献 特開 平５−98257（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C09K 17/12,17/08 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Kayahara 2-15-10 Hongo, Bunkyo-ku, Tokyo Inside Reinforced Soil Engineering Co., Ltd. (72) Inventor Tadashi Kijima 3-4-3 Nishiura, Funabashi-shi, Chiba Pref. (56) References JP-A-5-98257 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C09K 17/12, 17/08
Claims (3)
塩と、加水分解して酸性を呈するアルミニウム塩とから
なり、次の（１）〜（５）に定められる条件を満足する
地盤注入用薬液。 （１）水ガラスのモル比が2.８以上。 （２）水ガラスのＳｉＯ 2 濃度が全配合液中の５〜９重
量／容量％。 （３）アルミン酸のアルカリ金属塩と加水分解して酸性
を呈するアルミニウム塩との合計量がＡｌ 2 Ｏ 3 に換算
して全配合液中0.５〜1.６重量／容量％。 （４）アルミン酸のアルカリ金属塩のＡｌ 2 Ｏ 3 換算量
／加水分解して酸性を呈するアルミニウム塩のＡｌ 2 Ｏ
3 換算量＞3.０。 （５）アルミン酸のアルカリ金属塩のＡｌ 2 Ｏ 3 換算量
＋加水分解して酸性を呈するアルミニウム塩のＡｌ 2 Ｏ
3 換算量／水ガラスのＳｉＯ 2 量×１00＝７〜25％。 1. Water glass and alkali metal aluminate
Salt and an aluminum salt that is acidified by hydrolysis
And satisfies the conditions defined in the following (1) to (5)
Chemical solution for ground injection. (1) The molar ratio of water glass is 2.8 or more. (2) The water glass has a SiO 2 concentration of 5 to 9 times in the total formulation.
Amount / volume%. (3) Hydrolyzed with alkali metal aluminate to be acidic
Is converted to Al 2 O 3 with the aluminum salt exhibiting
And 0.5 to 1.6% by weight / volume in the total formulation. (4) Al 2 O 3 equivalent of alkali metal salt of aluminate
/ Al 2 O of aluminum salt which shows acidity by hydrolysis
3 conversion amount> 3.0. (5) Al 2 O 3 equivalent of alkali metal salt of aluminate
+ Al 2 O of an aluminum salt which exhibits acidity by hydrolysis
3 conversion amount / water glass SiO 2 amount × 100 = 7 to 25%.
ウム塩が硫酸アルミニウム、塩化アルミニウム、硝酸ア
ルミニウムおよびミョウバン類の群から選択される請求
項１の地盤注入用薬液。 2. An aluminum alloy which exhibits an acidity by hydrolysis.
Aluminum salt, aluminum chloride, aluminum nitrate
Claims selected from the group of luminium and alum
Item 1. A chemical for ground injection according to Item 1.
のＡｌ 2 Ｏ 3 換算量／加水分解して酸性を呈するアルミ
ニウム塩のＡｌ 2 Ｏ 3 換算量の値が3.０〜１0.０の範囲
内である請求項１に記載の地盤注入用薬液。 3. An alkali metal salt of aluminate according to claim 1.
Al 2 O 3 conversion amount of aluminum / Aluminum which exhibits acidity by hydrolysis
The value of the amount of aluminum salt in terms of Al 2 O 3 is in the range of 3.0 to 10.0.
2. The ground injection chemical solution according to claim 1, wherein
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34503595A JP3283171B2 (en) | 1995-12-08 | 1995-12-08 | Chemical liquid for ground injection |
| TW85115160A TW427965B (en) | 1995-12-08 | 1996-12-07 | Grouting liquid for injection into a ground |
| SG1997000306A SG67971A1 (en) | 1995-12-08 | 1997-02-13 | Grouting liquid for injection into a ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34503595A JP3283171B2 (en) | 1995-12-08 | 1995-12-08 | Chemical liquid for ground injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09157649A JPH09157649A (en) | 1997-06-17 |
| JP3283171B2 true JP3283171B2 (en) | 2002-05-20 |
Family
ID=18373849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34503595A Expired - Lifetime JP3283171B2 (en) | 1995-12-08 | 1995-12-08 | Chemical liquid for ground injection |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3283171B2 (en) |
| TW (1) | TW427965B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812838B (en) * | 2010-04-27 | 2011-08-10 | 天津大学 | Foundation reinforcement method based on curing agent and bucket foundation suction technique |
| JP6867649B2 (en) * | 2017-10-24 | 2021-05-12 | 戸田建設株式会社 | Sealing agent supplies and chemical injection method |
| JP7109033B2 (en) * | 2020-09-03 | 2022-07-29 | 戸田建設株式会社 | Sealants and sealant supplies |
-
1995
- 1995-12-08 JP JP34503595A patent/JP3283171B2/en not_active Expired - Lifetime
-
1996
- 1996-12-07 TW TW85115160A patent/TW427965B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09157649A (en) | 1997-06-17 |
| TW427965B (en) | 2001-04-01 |
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