JPH039987A - Grout - Google Patents
GroutInfo
- Publication number
- JPH039987A JPH039987A JP1144577A JP14457789A JPH039987A JP H039987 A JPH039987 A JP H039987A JP 1144577 A JP1144577 A JP 1144577A JP 14457789 A JP14457789 A JP 14457789A JP H039987 A JPH039987 A JP H039987A
- Authority
- JP
- Japan
- Prior art keywords
- water glass
- cement
- molar ratio
- grout
- lime
- 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.)
- Granted
Links
- 239000011440 grout Substances 0.000 title claims abstract description 24
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 32
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000004568 cement Substances 0.000 claims abstract description 19
- 239000004571 lime Substances 0.000 claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 12
- 239000004480 active ingredient Substances 0.000 claims abstract description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 22
- 239000000920 calcium hydroxide Substances 0.000 claims description 12
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 12
- 239000000292 calcium oxide Substances 0.000 claims description 11
- 235000012255 calcium oxide Nutrition 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 10
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 10
- 238000007711 solidification Methods 0.000 abstract description 16
- 230000008023 solidification Effects 0.000 abstract description 16
- 230000007774 longterm Effects 0.000 abstract description 7
- 239000007787 solid Substances 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000002156 mixing Methods 0.000 description 6
- 238000001879 gelation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000009974 thixotropic effect Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000007900 aqueous suspension Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
Abstract
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、数時間の凝固時間を持続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−水ガラス系グラウト材に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improvement of cement-water glass grout,
In particular, the present invention relates to a cement-water glass grout material that maintains a solidification time of several hours, solidifies reliably in the ground after a long period of time, and has excellent long-term solidification strength.
セメント−水ガラス系グラウトとして従来、高モル比水
ガラス（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に短縮し、かつ長
期固結強度を増強するために、消石灰または生石灰の添
加がはかられている。Conventionally, a high molar ratio water glass (No. 3 water glass with a molar ratio of around 3) is used as a cement-water glass grout, and a grout with a solidification time of 1 to several minutes has been put into practical use as the LW construction method. Slaked lime or quicklime is added to this grout to reduce the setting time to a few seconds and to increase long-term setting strength.
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（Ｓ ｉ Ｏｘ ＋Ｎ ａ ２０重量％）３３〜４
５％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。In addition, in order to extend the solidification time of this grout, the concentration of water glass and cement is reduced, but the strength of the grout is severely deteriorated. As an improved method, the molar ratio is 1.4 to 2.5,
Concentration (S i Ox + Na 20% by weight) 33-4
A method has been devised in which 5% water glass and cement suspension are mixed together and solidified over several minutes.
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。In addition, in water glass-cement grout, an unconsolidated fluid gel of a low molar ratio water glass aqueous solution and a cement suspension is mixed with cohesive soil, or aluminum hydroxide glue precipitate is added to this grout. Ideas have been devised to mix it into sandy ground. However, in this method, the strength deteriorates as the molar ratio decreases for 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）ＩＱ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。A method in which a soluble alkaline agent is added to a system consisting of an acidic silica sol obtained by forced mixing of water glass and an acidic agent, mainly sulfuric acid, and a cement (IQ) suspension to adjust the coagulation time from several tens of seconds to several minutes. has also been devised.
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 in this method, it is impossible to maintain the coagulation time for several hours, and there is a concern that undesirable sulfate ions will leak out.
凝固時間を数時間まで長びかせて均等混合による１シヨ
ツト注入を可能にし、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。At present, no water glass-cement grout has been developed which can extend the solidification time up to several hours to enable one-shot injection with uniform mixing, and which itself has excellent long-term consolidation strength and permanence.
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。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a water glass-cement grout material that lasts for several hours in solidification time and exhibits a uniform consolidated body and strong consolidation strength.
前述の目的を達成するため、本発明によれば、モル比１
．０〜２．４の水ガラスと、セメントと、石灰とを有効
成分としてなることを特徴とする。To achieve the aforementioned object, according to the invention, the molar ratio 1
．． It is characterized by containing 0 to 2.4 water glass, cement, and lime as active ingredients.
前述水ガラスにおいて、モル比は好ましくは１．５〜２
．２である。また、石灰とは消石灰および／または生石
灰であり、この配合量は消石灰換算で２〜１０重量／容
量％（生石灰として１．５〜８重量／容量％）である。In the water glass mentioned above, the molar ratio is preferably 1.5 to 2.
．． It is 2. Moreover, lime refers to slaked lime and/or quicklime, and the blending amount thereof is 2 to 10% by weight/volume in terms of slaked lime (1.5 to 8% by weight/volume as quicklime).
水ガラス−セメント系グラウトにおいて、使用する水ガ
ラスのモル比を低下せしめると、モル比が２近辺以下で
急に凝固することなく流動性の状態を長時間持続し、こ
の混合液をそのまま放置しておくと離漿現象を起こして
上澄液を生じて沈殿し、その沈殿物は強度的にも軟弱で
ある。In water glass-cement grout, if the molar ratio of the water glass used is lowered, it will not solidify suddenly at a molar ratio of around 2 or less and will maintain a fluid state for a long time, allowing the mixture to remain as it is. If left to stand, syneresis occurs and a supernatant liquid is produced which precipitates, and the precipitate is weak in strength.
このような混合物は明白なゲル化時点がみられず、注入
範囲外へ逸脱してしまい、また強度並びに水密性も不充
分で注入材としては不適当である。Such a mixture has no obvious gelation point, deviates from the injection range, and has insufficient strength and watertightness, making it unsuitable as an injection material.
本発明は低いモル比の水ガラスにセメントおよび消石灰
又は生石灰を加えると、−変して揺変現象を呈し、粘性
を増すが、凝固に至らず流動性の状態を数時間持続した
のちに流動性を失ってゲル化し、しかも石灰無添加の場
合に比べて固結体の離漿水はほとんどなく、均一な状態
の固結体を得ることができ、水中養生により著しく強度
の増加がみられた。In the present invention, when cement and slaked lime or quicklime are added to water glass with a low molar ratio, it undergoes a thixotropic phenomenon and increases viscosity, but does not solidify and remains fluid for several hours before flowing. It loses its properties and becomes a gel, and there is almost no syneresis water in the solids compared to when no lime is added, making it possible to obtain solids in a uniform state, and the strength is significantly increased by curing in water. Ta.
従って低モル比の水ガラス水溶液−セメント−石灰系か
らなるグラウト材は、従来のセメン）−水ガラス系グラ
ウト材では不可能な１シヨツト注入を可能にし、しかも
長期固結強度の増強と優れた恒久性が期待できる。特に
水ガラスとしてモル比が１．０〜２．４、好ましくは１
．５〜２．２、石灰２〜１０重量／容量％（消石灰換算
）の範囲にあるものは数時間後には確実にゲル化し強度
的にも優れている。Therefore, a grout material consisting of a water glass aqueous solution-cement-lime system with a low molar ratio enables one-shot injection, which is impossible with conventional cement-water glass grout materials, and has an excellent long-term consolidation strength. Permanence can be expected. Especially as water glass, the molar ratio is 1.0 to 2.4, preferably 1.
．． 5 to 2.2 and lime in the range of 2 to 10% by weight/volume (calculated as slaked lime), it gels reliably after several hours and is excellent in strength.
以下実施例により具体的に詳述する。 This will be explained in detail below using Examples.
実施例
１、使用水ガラス
モル比の異なる表−１に示す５種類の水ガラスを使用す
る。Example 1: Five types of water glasses shown in Table 1 with different water glass molar ratios are used.
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に示す表−２から次のことがわかる。2. Water glass-cement grout A water glass aqueous solution with various molar ratios shown in Table 1 was used as Solution A, a water suspension of cement was used as Solution B, and the results of mixing Solutions A and B are shown in Table 2. The following can be seen from Table 2.
（１）使用水ガラスのモル比が３．１から１．９７と低
下するに従って凝固時間は長くなり、強度は低下してい
く。(1) As the molar ratio of the water glass used decreases from 3.1 to 1.97, the solidification time increases and the strength decreases.
（２）使用水ガラスのモル比がさらに低下するとゲル化
することなく上澄液を生じて沈殿する。沈殿物の強度は
モル比３付近の水ガラスの場合に比べて著しく弱く、ま
た固結体自体の離漿水も多い。(2) When the molar ratio of the water glass used further decreases, a supernatant liquid is produced and precipitated without gelation. The strength of the precipitate is significantly weaker than that of water glass with a molar ratio of around 3, and there is also much syneresis water in the solids themselves.
３、水ガラス−セメント−消石灰（または生石灰）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・消石灰（または生石灰）の水懸
濁液を用い、Ａ液とＢ液の混合による結果を表−３に示
す。3. Water glass-cement-slaked lime (or quicklime) grout A water glass aqueous solution with various molar ratios shown in Table 1 is used as solution A, and an aqueous suspension of cement and slaked lime (or quicklime) is used as solution B. Table 3 shows the results obtained by mixing B and B.
表−３から次のことがわかる。The following can be seen from Table 3.
（１）モル比３．１と２．５の水ガラスを使用の場合は
表−２のそれに相当する系よりも凝固時間は短縮し、強
度的にも優れた固結体を得た。従って短時間凝固として
は優れたグラウトである。(1) When water glasses with a molar ratio of 3.1 and 2.5 were used, the solidification time was shorter than that of the corresponding system shown in Table 2, and a consolidated body with superior strength was obtained. Therefore, it is an excellent grout for short-term solidification.
（２）モル比１．９７の水ガラスを使用の場合、表−２
のそれに相当する系では３〜５分の凝固時間であったも
のが、−変して揺変現象を呈し、粘性を増すが流動性を
数時間持続しながら明白なゲル化状態となり流動性を失
い凝固に至る。(2) When using water glass with a molar ratio of 1.97, Table 2
In the system corresponding to that, the solidification time was 3 to 5 minutes, but the solidification time changed to - and exhibited a thixotropic phenomenon, increasing viscosity but maintaining fluidity for several hours, becoming clearly gelled and losing fluidity. loss and coagulation.
しかも強度は表−２の石灰類無添加の場合より増加、特
に水中養生３０日口の増加は著しい。Moreover, the strength increased compared to the case of no lime added in Table 2, and the increase was particularly remarkable after 30 days of underwater curing.
（３）モル比１．５１．１．０４の水ガラスを使用の場
合でもモル比１．９７の場合と同じ傾向を示す。(3) Even when water glass with a molar ratio of 1.51.1.04 is used, the same tendency as in the case with a molar ratio of 1.97 is shown.
モル比１．０４となると揺変現象によって粘性の増加が
著しく、半凝固状態に近い状態になるためモル比１．５
以上の水ガラスを併用することが好ましい。When the molar ratio becomes 1.04, the viscosity increases significantly due to the thixotropic phenomenon, and the state becomes close to a semi-solidified state, so the molar ratio is 1.5.
It is preferable to use the above water glasses together.
（４）消石灰または生石灰の使用量は多い程離漿水は少
なく、固結強度も優れ、消石灰は２重量／容量％以上、
生石灰は１．５重量／容量％以上の添加が望ましい。し
かし、消石灰は１０重量／容量％以上、生石灰は８重量
／容量％以上の多量添加は粘性の増加で混合系の初期か
ら流動性に欠はゲル化時が不明瞭となる。(4) The larger the amount of slaked lime or quicklime used, the less syneresis water and the better the consolidation strength.
It is desirable to add quicklime in an amount of 1.5% by weight/volume or more. However, when slaked lime is added in large quantities of 10% by weight or more, and quicklime is added in large quantities of 8% by weight or more by volume, the viscosity increases, resulting in a lack of fluidity from the initial stage of the mixing system, and the time of gelation becomes unclear.
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。Of course, in the present invention, the gelation time can be adjusted by changing the amounts of water glass, cement, and lime, and by using calcium chloride and other salts in combination.
セメント−水ガラス（高モル比）の系、またはセメント
−水ガラス（高モル比）−石灰類からなる系では、数分
から数ｌθ秒程度の凝固時間で固結せしめるのに適して
いるが数時間の凝固時間で固結し、しかも強固な固結を
うることは不可能とされていた。本発明は、モル比１．
０〜２．４、好ましくは１．５〜２．２の低モル比が水
ガラスとセメント−消石灰（または生石灰）からなる系
において起る揺変現象と所定時間後に明白なゲル化が生
じて流動性がなくなることに着目して、数時間の長時間
を要して凝固せしめ、しかも生成した固結体は強度特に
長期強度に極めてすぐれた均一な固結体をうることがで
きる。In systems consisting of cement - water glass (high molar ratio) or cement - water glass (high molar ratio) - lime, it is suitable for solidification in a few minutes to several lθ seconds, but It was thought that it was impossible to solidify in a time-consuming solidification time and to obtain a strong solidification. The present invention has a molar ratio of 1.
A low molar ratio of 0 to 2.4, preferably 1.5 to 2.2, occurs in a system consisting of water glass and cement-slaked lime (or quicklime) with thixotropy and obvious gelation occurring after a certain time. Focusing on the lack of fluidity, solidification takes a long time of several hours, and the resulting solidified material can be a uniform solidified material with excellent strength, especially long-term strength.
Claims (4)
、石灰とを有効成分としてなるグラウト材。(1) A grout material containing water glass with a molar ratio of 1.0 to 2.4, cement, and lime as active ingredients.
モル比が１．５〜２．２であるグラウト材。(2) The grout material according to claim 1, wherein the molar ratio of water glass is 1.5 to 2.2.
灰および／または生石灰であるグラウト材。(3) The grout material according to claim 1, wherein the lime is slaked lime and/or quicklime.
が消石灰換算で２〜１０重量／容量％であるグラウト材
。(4) The grout material according to claim 1, wherein the lime content is 2 to 10% by weight/volume in terms of slaked lime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144577A JPH07116438B2 (en) | 1989-06-07 | 1989-06-07 | Grout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144577A JPH07116438B2 (en) | 1989-06-07 | 1989-06-07 | Grout |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH039987A true JPH039987A (en) | 1991-01-17 |
| JPH07116438B2 JPH07116438B2 (en) | 1995-12-13 |
Family
ID=15365400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1144577A Expired - Fee Related JPH07116438B2 (en) | 1989-06-07 | 1989-06-07 | Grout |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07116438B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54162810A (en) * | 1978-06-13 | 1979-12-24 | Sanyo Chemical Ind Ltd | Soil nature stabilizing method by liquid chemicals |
| JPS57131279A (en) * | 1981-02-06 | 1982-08-14 | Nippon Synthetic Chem Ind Co Ltd:The | Grouting |
| JPS57139174A (en) * | 1981-02-23 | 1982-08-27 | Toagosei Chem Ind Co Ltd | Ground stabilizer |
| JPS60124689A (en) * | 1983-12-09 | 1985-07-03 | Raito Kogyo Kk | Conditioning of ground |
-
1989
- 1989-06-07 JP JP1144577A patent/JPH07116438B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54162810A (en) * | 1978-06-13 | 1979-12-24 | Sanyo Chemical Ind Ltd | Soil nature stabilizing method by liquid chemicals |
| JPS57131279A (en) * | 1981-02-06 | 1982-08-14 | Nippon Synthetic Chem Ind Co Ltd:The | Grouting |
| JPS57139174A (en) * | 1981-02-23 | 1982-08-27 | Toagosei Chem Ind Co Ltd | Ground stabilizer |
| JPS60124689A (en) * | 1983-12-09 | 1985-07-03 | Raito Kogyo Kk | Conditioning of ground |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07116438B2 (en) | 1995-12-13 |
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