JPH0749578B2 - Water glass-cement-based grout - Google Patents
Water glass-cement-based groutInfo
- Publication number
- JPH0749578B2 JPH0749578B2 JP1160311A JP16031189A JPH0749578B2 JP H0749578 B2 JPH0749578 B2 JP H0749578B2 JP 1160311 A JP1160311 A JP 1160311A JP 16031189 A JP16031189 A JP 16031189A JP H0749578 B2 JPH0749578 B2 JP H0749578B2
- Authority
- JP
- Japan
- Prior art keywords
- water glass
- molar ratio
- cement
- strength
- grout
- 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 - Fee Related
Links
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はセメント−水ガラス系グラウトの改良に係り、
詳細には、低モル比水ガラスを使用することによって起
こる揺変現象を利用して長時間後に地盤中で確実に固結
せしめ、かつ長期固結強度に優れたセメント−水ガラス
系のグラウト材に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to improvement of a cement-water glass-based grout,
Specifically, a cement-water glass-based grout material that firmly solidifies in the ground after a long time by utilizing the thixotropic phenomenon that occurs when using a low molar ratio water glass, and has excellent long-term consolidation strength. Regarding
セメント−水ガラス系グラウトとして従来、モル比３前
後の３号水ガラスを用い、凝固時間が１〜数分のグラウ
トがLW工法として実用化されている。このグラウトは凝
固時間を数秒〜10数秒に短縮するためには消石灰または
生石灰の添加がはかられている。Conventionally, as the cement-water glass grout, No. 3 water glass having a molar ratio of about 3 is used and a grout having a solidification time of 1 to several minutes has been put into practical use as an LW method. This grout is added with slaked lime or quick lime in order to shorten the setting time to several seconds to several tens of seconds.
また、このグラウトは凝固時間を延長せしめるために
は、水ガラスやセメントの濃度を低下させるが、強度の
劣化が激しい。その改良法としてモル比1.4〜2.5、濃度
（SiO2＋Na2O重量％）33〜45％の水ガラスとセメント懸
濁液を合流混合して数分程度を要して凝固せしめる工法
が考案されている。Further, this grout lowers the concentration of water glass and cement in order to prolong the solidification time, but the strength is severely deteriorated. As an improved method, a method was devised in which a water glass with a molar ratio of 1.4 to 2.5 and a concentration (SiO 2 + Na 2 O weight%) of 33 to 45% was mixed and mixed to solidify in a few minutes. ing.
また、水ガラス−セメント系グラウトにおいて、低モル
比水ガラス水溶液とセメント懸濁液の未固結流動性ゲル
を粘性土に混合、またはこのグラウトに水酸化アルミニ
ウム膠状沈殿物等を添加して砂地地盤に混合する考案が
なされている。しかしこの工法は水ガラスの同一濃度に
対してモル比が低下するに従って強度劣化をきたしてい
る。Further, in the water glass-cement-based grout, a low molar ratio water glass aqueous solution and an unconsolidated fluid gel of a cement suspension are mixed with cohesive soil, or an aluminum hydroxide glue precipitate or the like is added to this grout. It has been devised to mix it with sandy ground. However, this method causes strength deterioration as the molar ratio decreases with respect to the same concentration of water glass.
水ガラスと硫酸を主とした酸性剤との強制混合によって
得た酸性シリカゾルとセメント懸濁液からなる系に溶解
性アルカリ剤を加えて凝固時間を数10秒から数分程度に
調整する工法も考案されている。There is also a method of adjusting the coagulation time to several tens of seconds to several minutes by adding a soluble alkaline agent to the system consisting of acidic silica sol and cement suspension obtained by forced mixing of water glass and acidic agent mainly containing sulfuric acid. Invented.
この工法においても凝固時間を数時間持続せしめること
は不可能で、かつ好ましからざる硫酸イオン流出の懸念
を生ずる。Even with this method, it is impossible to maintain the coagulation time for several hours, and there is a fear of undesired outflow of sulfate ions.
凝固時間を数時間まで長びかせて均等混合による１ショ
ット注入を可能にし、しかもそれ自体で長期固結強度と
恒久性に優れた水ガラス−セメント系グラウトは現在の
ところ未だに開発されていない。A water glass-cement-based grout which has a long setting time up to several hours and enables one shot injection by uniform mixing, and which itself has excellent long-term consolidation strength and durability, has not yet been developed.
そこで、本発明の目的は数時間の凝固時間を持続し、し
かも均一な固結体と強固な固結強度を示す水ガラス−セ
メント系グラウト材を提供するものである。Therefore, an object of the present invention is to provide a water glass-cement-based grout material which continues a coagulation time of several hours and shows a uniform solidified body and a strong solidified strength.
前述の目的を達成するため、本発明によれば、低モル比
水ガラスとセメントとを有効成分とする水ガラス−セメ
ント系グラウト材において、前記低モル比水ガラスが水
ガラスに水酸化アルカリを添加混合してモル比1.0〜2.4
の低モル比を呈し、かつ前記グラウト材に揺変現象を起
こさせるように製造されてなることを特徴とし、さらに
必要に応じて前記水ガラス−セメント系グラウト材に石
灰（消石灰、生石灰）を混合してなることを特徴とす
る。In order to achieve the above-mentioned object, according to the present invention, in a water glass-cement-based grout material having a low molar ratio water glass and cement as active ingredients, the low molar ratio water glass contains an alkali hydroxide in the water glass. Add and mix to obtain a molar ratio of 1.0 to 2.4
Of a low molar ratio, and is characterized in that it is produced so as to cause a rocking phenomenon in the grout material, further lime (slaked lime, quick lime) in the water glass-cement-based grout material if necessary. It is characterized by being mixed.
水ガラス−セメント系グラウトでは、使用する水ガラス
のモル比を低下させていくと、凝固時間が徐々に長び
き、モル比が２近辺以下のところで急に流動性を保った
まま、長時間ゲル化することなく、放置しておけば上澄
液を生じて沈殿し、凝固する。In the water glass-cement-based grout, when the molar ratio of the water glass used is decreased, the solidification time gradually increases, and when the molar ratio is around 2 or less, the fluidity is suddenly maintained and the gel is kept for a long time. If it is allowed to stand without being solidified, a supernatant liquid is produced, which precipitates and solidifies.
このような配合液を、注入に用いた場合、水密性も不充
分でまた強度的にも軟弱であるため、注入材としては不
適当である。When such a compounded liquid is used for injection, it is unsuitable as an injection material because it is insufficient in watertightness and weak in strength.
本発明者は低モル比の水ガラスの使用にあたり、低モル
比の調整を水ガラスに水酸化ナトリウムまたは水酸化カ
リウム（Na2Oと化学的当量のK2O）の水溶液を添加混合
して製造される低モル比水ガラス液を使用することによ
り、モル比2.4近辺から揺変現象を呈し、離漿現象は減
少し、数時間後に配合液全体が固化し、強度的にも優れ
た固結体をうることを発見し、さらに消石灰、生石灰を
添加することにより、強度強化やゲル化時を明確にし得
ることを発見し、本発明を完成するに至った。The present inventor uses a low molar ratio water glass by adjusting the low molar ratio by adding an aqueous solution of sodium hydroxide or potassium hydroxide (Na 2 O and a chemical equivalent of K 2 O) to the water glass and mixing. By using the low molar ratio water glass liquid produced, a shaking phenomenon is exhibited from around a molar ratio of 2.4, syneresis is reduced, and the compounded liquid solidifies after a few hours, which is excellent in strength. It was discovered that a lump can be obtained, and further that slaked lime and quick lime were added to clarify strength enhancement and gelation time, and completed the present invention.
以下本発明を実施例により具体的に詳述する。Hereinafter, the present invention will be described in detail with reference to Examples.
1.使用水ガラス モル比の異なった表−１に示す５種類の水ガラスを使用
した。（水ガラスは所定のモル比のカレットを溶融した
ものである。） 2.水ガラス−セメント系グラウト 表−１の各種モル比の水ガラス水溶液をＡ液とし、Ｂ液
としてセメントの水懸濁液を用い、Ａ液とＢ液の混合に
よる結果を表−２に示す。1. Water glass used Five kinds of water glass shown in Table 1 having different molar ratios were used. (Water glass is made by melting cullet in a predetermined molar ratio.) 2. Water glass-cement-based grout Table-2 shows the results obtained by mixing the solutions A and B with water glass aqueous solutions having various molar ratios shown in Table 1 as solution A, and an aqueous suspension of cement as solution B. Show.
表−２から次のことがわかる。 The following can be seen from Table-2.
（１）使用水ガラスのモル比が3.1、2.5、1.97と低下す
るにつれて凝固時間は徐々に長びき、それ以下に低下す
ると流動性を持続し、放置すると、上澄液を生じて沈澱
し、明白なゲル化を示さなくなる。(1) As the molar ratio of the water glass used decreases to 3.1, 2.5, and 1.97, the coagulation time gradually increases, and when it falls below that, the fluidity is maintained, and when left unattended, a supernatant liquid forms and precipitates, It shows no obvious gelation.
（２）使用水ガラスのモル比が3.1、2.5、1.97と低下す
るに従って強度は低下の傾向をたどり、さらにモル比が
低下すると強度は極端に低下している。(2) As the molar ratio of the water glass used decreases to 3.1, 2.5, and 1.97, the strength tends to decrease, and when the molar ratio further decreases, the strength extremely decreases.
3.水酸化ナトリウムまたは水酸化カリウムを用いた低モ
ル比水ガラス溶液の調整 モル比3.1の市販３号水ガラス（表−１の（１））を基
準として、これに水酸化ナトリウムまたは水酸化カリウ
ムの水溶液を添加混合して低モル比水ガラス溶液を調整
した。調整した低モル比水ガラス液の配合（100ml当
り）を表−３に示す。3. Preparation of a low molar ratio water glass solution using sodium hydroxide or potassium hydroxide Based on a commercially available No. 3 water glass having a molar ratio of 3.1 ((1) in Table 1), sodium hydroxide or hydroxide was added thereto. An aqueous solution of potassium was added and mixed to prepare a low molar ratio water glass solution. Table 3 shows the formulation (per 100 ml) of the adjusted low molar ratio water glass liquid.
4.調整低モル比水ガラス溶液とセメント懸濁液とからな
る系のグラウト モル比3.1の市販３号水ガラス（表−１の（１））に水
酸化ナトリウムまたは水酸化カリウムの水溶液を添加溶
解し調整した表−３に示された調整低モル比水ガラス液
をＡ液とし、Ｂ液としてセメント懸濁液を用いて、Ａ液
とＢ液の混合による結果を表−４に示す。 4. Preparation A system consisting of a low-molar-ratio water glass solution and a cement suspension, and an aqueous solution of sodium hydroxide or potassium hydroxide added to a commercially available No. 3 water glass ((1) in Table 1) having a grout molar ratio of 3.1. Table 4 shows the results obtained by mixing the liquids A and B with the adjusted low molar ratio water glass liquid shown in Table 3 dissolved and adjusted as the liquid A and the cement suspension as the liquid B.
表−４から次のことがわかる。 The following can be seen from Table-4.
（１）表−２のモル比1.97の水ガラスでは数分の凝固時
間を要しているがこれに相当する表−４のモル比2.0の
調整水ガラスを用いた場合は、揺変現象を起こして流動
性の高い状態で数時間持続し、明白なゲル化に至って全
体が固化する。しかも強度も著しく増加している。この
状態はモル比2.4の調整水ガラスを使用した場合も同様
である。(1) The water glass with a molar ratio of 1.97 in Table 2 requires a few minutes of solidification time, but when the adjusted water glass with a molar ratio of 2.0 in Table 4 corresponding to this is used, the thixotropic phenomenon occurs. It rises and lasts for a few hours in a highly fluid state, and reaches a clear gelation and solidifies as a whole. Moreover, the strength is significantly increased. This state is the same when the adjusted water glass having a molar ratio of 2.4 is used.
（２）モル比1.5の調整水ガラスを使用した場合は表−
２のモル比1.51の水ガラス使用の場合に比べて強度的に
はるかにに優れている。(2) Table when using adjusted water glass with a molar ratio of 1.5
The strength is far superior to the case of using water glass with a molar ratio of 1.51.
（３）モル比2.5の調整水ガラスを使用した場合も表−
２のモル比2.5の水ガラス使用の場合に比べて強度が増
加している。ただし、この場合は揺変現象はみられな
い。(3) Table when using adjusted water glass with a molar ratio of 2.5
The strength is increased as compared with the case of using water glass having a molar ratio of 2.5 of 2. However, in this case, no shaking phenomenon is observed.
（４）このように水ガラスのモル比2.4近辺以下に水酸
化ナトリウムまたは水酸化カリウムで調整した低モル比
水ガラスを使用することにより揺変現象を起こして流動
性の高い状態を数時間保持しつづけて配合液全体が凝固
に至り、しかも高強度の固結体が得られる。(4) By using a water glass with a low molar ratio adjusted with sodium hydroxide or potassium hydroxide to a water glass molar ratio of about 2.4 or less, a rocking phenomenon is caused to maintain a high fluidity state for several hours. The entire compounded liquid continues to solidify, and a high-strength solidified body is obtained.
5.調整低モル比水ガラス溶液とセメント・消石灰、また
はセメント・生石灰とからなる系のグラウト 表−４の系においてＢ液に消石灰、または生石灰を添加
した系であり、その結果を表−５に示す。5. Grout of a system consisting of adjusted low molar ratio water glass solution and cement / slaked lime, or cement / quick lime Table 4 is a system in which slaked lime or quick lime is added to solution B, and the results are shown in Table-5. Shown in.
表−５の結果は表−４の結果とほぼ同様の傾向を示すが
強度的には一段と優れ、所定の時間に明白なゲル化が生
じ、流動性がなくなる。 The results of Table-5 show almost the same tendency as the results of Table-4, but the strength is much more excellent, and clear gelation occurs at a predetermined time and the fluidity is lost.
ただ、モル比2.5の調整低モル比水ガラスの場合は揺変
現象を起こさず、短時間で凝固するため、ミキサー中に
おける均質混合は不可能であって短いゲル化時間におけ
る適用にしか用いることができない。However, in the case of an adjusted low molar ratio water glass with a molar ratio of 2.5, it does not cause a rocking phenomenon and solidifies in a short time, so homogeneous mixing in a mixer is not possible and it should only be used for applications with a short gel time. I can't.
本発明は水ガラス、セメント、石灰類の量を変えること
により、また塩化カルシウムその他の塩類を併用するこ
とによりゲル化時間を調整できるのは勿論である。In the present invention, it is needless to say that the gelation time can be adjusted by changing the amounts of water glass, cement and lime, and by using calcium chloride and other salts together.
本発明は水ガラスに水酸化ナトリウムまたは水酸化カリ
ウムの水溶液を混合してモル比を1.0〜2.4に調整した低
モル比調整水ガラス液とセメントまたはセメントとさら
に消石灰（または生石灰）の懸濁液を混合してなる水ガ
ラス−セメント系グラウト材で次に示す効果を発揮す
る。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a low-molar-ratio adjusted water glass liquid in which an aqueous solution of sodium hydroxide or potassium hydroxide is mixed with water glass to adjust the molar ratio to 1.0 to 2.4, and a suspension of cement or cement and slaked lime (or quick lime). The following effects are exhibited by a water glass-cement-based grout material obtained by mixing
（１）低モル比調整水ガラスは、セメント懸濁液との混
合により揺変現象を起こして流動性の高い状態を持続
し、数時間後には配合液全体が固化する。(1) The low molar ratio adjusted water glass causes a rocking phenomenon by mixing with a cement suspension to maintain a high fluidity state, and after a few hours, the entire mixed solution solidifies.
（２）単なる低モル比水ガラスでは、モル比の低下に従
って固結強度の低下をきたすが、低モル比調整水ガラス
を使用した場合は強度の低下をきたすことなく、特に長
期固結強度の強化に期待がもてる。(2) In a mere low molar ratio water glass, the consolidation strength decreases as the molar ratio decreases, but when a low molar ratio adjusted water glass is used, the strength does not decrease, and particularly long-term consolidation strength We can expect to strengthen it.
（３）消石灰、生石灰の添加により、さらに強度的に増
強の傾向を示す。(3) The addition of slaked lime and quick lime shows a tendency of further strengthening.
（４）以上からセメント−水ガラス系グラウトとしてミ
キサー中で均質混合して注入することにより、強固で恒
久性に優れたグラウトを注入することができる。(4) From the above, it is possible to inject a strong and durable grout by homogeneously mixing and injecting the cement-water glass grout in a mixer.
Claims (2)
とする水ガラス−セメント系グラウト材において、前記
低モル比水ガラスが水ガラスに水酸化アルカリを添加混
合してモル比1.0〜2.4の低モル比を呈し、かつ前記グラ
ウト材に揺変現象を起こさせるように製造されてなる水
ガラス−セメント系グラウト材。1. A water glass-cement-based grout material containing low-molar ratio water glass and cement as active ingredients, wherein the low-molar ratio water glass is prepared by adding alkali hydroxide to water glass and mixing them in a molar ratio of 1.0 to 2.4. The water glass-cement-based grout material having a low molar ratio and being manufactured so as to cause a rocking phenomenon in the grout material.
て、前記水ガラス−セメント系グラウト材に、さらに石
灰を混合してなる水ガラス−セメント系グラウト材。2. The grout material according to claim 1, wherein the water glass-cement grout material is further mixed with lime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1160311A JPH0749578B2 (en) | 1989-06-22 | 1989-06-22 | Water glass-cement-based grout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1160311A JPH0749578B2 (en) | 1989-06-22 | 1989-06-22 | Water glass-cement-based grout |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0326784A JPH0326784A (en) | 1991-02-05 |
| JPH0749578B2 true JPH0749578B2 (en) | 1995-05-31 |
Family
ID=15712215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1160311A Expired - Fee Related JPH0749578B2 (en) | 1989-06-22 | 1989-06-22 | Water glass-cement-based grout |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0749578B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4933931B2 (en) * | 2007-03-22 | 2012-05-16 | 第一工業製薬株式会社 | Injection material composition for stabilization of ground and stability strengthening method using the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5914513B2 (en) * | 1978-06-13 | 1984-04-04 | 三洋化成工業株式会社 | Soil stabilization method using chemical solutions |
| JPS57131279A (en) * | 1981-02-06 | 1982-08-14 | Nippon Synthetic Chem Ind Co Ltd:The | Grouting |
| JPS60124689A (en) * | 1983-12-09 | 1985-07-03 | Raito Kogyo Kk | Conditioning of ground |
-
1989
- 1989-06-22 JP JP1160311A patent/JPH0749578B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0326784A (en) | 1991-02-05 |
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