JP2853773B2 - Ground injection agent - Google Patents
Ground injection agentInfo
- Publication number
- JP2853773B2 JP2853773B2 JP2211868A JP21186890A JP2853773B2 JP 2853773 B2 JP2853773 B2 JP 2853773B2 JP 2211868 A JP2211868 A JP 2211868A JP 21186890 A JP21186890 A JP 21186890A JP 2853773 B2 JP2853773 B2 JP 2853773B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- colloidal silica
- aluminosilicate
- ground injection
- zeolite
- 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
- 238000002347 injection Methods 0.000 title claims description 20
- 239000007924 injection Substances 0.000 title claims description 20
- 239000003795 chemical substances by application Substances 0.000 title claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 239000004568 cement Substances 0.000 claims description 31
- 239000008119 colloidal silica Substances 0.000 claims description 30
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 30
- 239000010457 zeolite Substances 0.000 claims description 24
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 19
- 229910021536 Zeolite Inorganic materials 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 239000002243 precursor Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 12
- -1 Portland cement Chemical class 0.000 description 9
- 235000019353 potassium silicate Nutrition 0.000 description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 8
- 229910052783 alkali metal Inorganic materials 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 239000011398 Portland cement Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 3
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910000318 alkali metal phosphate Inorganic materials 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000003349 gelling agent Substances 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 2
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052915 alkaline earth metal silicate Inorganic materials 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- JYIBXUUINYLWLR-UHFFFAOYSA-N aluminum;calcium;potassium;silicon;sodium;trihydrate Chemical compound O.O.O.[Na].[Al].[Si].[K].[Ca] JYIBXUUINYLWLR-UHFFFAOYSA-N 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 229910001603 clinoptilolite Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- YZVJHCGMTYDKFR-UHFFFAOYSA-L magnesium;disulfamate Chemical compound [Mg+2].NS([O-])(=O)=O.NS([O-])(=O)=O YZVJHCGMTYDKFR-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052680 mordenite Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001935 peptisation Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229940071207 sesquicarbonate Drugs 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、水性コロイダルシリカを主剤に用いた地盤
注入用薬液であって、軟弱地盤の強化や湧き出し地下水
の止水などに使用される地盤注入剤に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is a chemical solution for injecting ground using aqueous colloidal silica as a main component, and is used for strengthening soft ground or stopping water flowing out of ground. It relates to ground injection.
従来の注入剤としては水ガラスを主剤としたものが多
用され、その硬化剤（ゲル化剤）にはポルトランドセメ
ント、消灰石、鉄鋼スラグ等のカルシウム塩類や、硫酸
水素ナトリウム、硫酸マグネシウム、リン酸等の各種酸
類、グリオキザール、エチレンカーボネートなどの有機
酸、エステル類が使用されてきた。又水ガラスのアルカ
リを嫌って水性コロイダルシリカを主剤とした注入剤も
幾つか提案されている。As a conventional injecting agent, water glass is mainly used, and its hardening agent (gelling agent) includes calcium salts such as Portland cement, dehydrated stone, steel slag, sodium hydrogen sulfate, magnesium sulfate, and phosphorus. Various acids such as acids, organic acids such as glyoxal and ethylene carbonate, and esters have been used. In addition, some injection agents containing aqueous colloidal silica as a main component in favor of water glass alkali have been proposed.
例えば、水性コロイダルシリカに、消灰石やポルトラ
ンドセメント（特開昭59−66482号公報）、スルファミ
ン酸マグネシウム等のアルカリ土類金属塩（特開昭63−
168485号公報）、塩化ナトリウムや硫酸水素ナトリウム
等のアルカリ金属塩（特開昭59−152985号公報）、アル
ミニウム塩等の３価の金属塩（特開昭59−152984号公
報）等の電解質を加えて硬化させる方法が提案されてい
る。For example, in aqueous colloidal silica, alkaline earth metal salts such as slaked stone, portland cement (JP-A-59-66482), magnesium sulfamate and the like (JP-A-63-664).
168485), an alkali metal salt such as sodium chloride and sodium hydrogen sulfate (JP-A-59-152985), and a trivalent metal salt such as an aluminum salt (JP-A-59-152984). In addition, a curing method has been proposed.
また、セメントにゼオライトを添加するセメントの硬
化促進法は、特開平２−8981公報に記載されている。A method for accelerating the hardening of cement by adding zeolite to cement is described in JP-A-2-8981.
また、セメントの凝結調節剤については既に多くの文
献に紹介されており、アルカリ金属炭酸塩、アルカリ金
属リン酸塩、アルカリ金属カルボン酸塩が実用化されて
いる。In addition, cement setting modifiers have already been introduced in many documents, and alkali metal carbonates, alkali metal phosphates and alkali metal carboxylate salts have been put to practical use.
水ガラスを使用する方法は、既に多数の文献で紹介さ
れているように、注入した材料に含まれる多量のナトリ
ウム塩の存在のため耐久性に問題があり、仮設材として
の価値しか認められていない。さらには溶出してくる塩
類のために地下水の汚染や地下埋設物の腐食が問題にな
る。酸性水ガラスを使用した場合にもこれらの欠点はま
ったく同じである。The method of using water glass has a problem in durability due to the presence of a large amount of sodium salt contained in the injected material and has been recognized only as a temporary material, as already introduced in many documents. Absent. In addition, contamination of groundwater and corrosion of underground buried objects become problems due to salts eluted. These disadvantages are exactly the same when acid water glass is used.
そこで、アルカリ金属塩を実質的に含まないか、全く
含まないコロイダルシリカの利用が注目されてきている
が、電解質としての金属塩類はコロイダルシリカをゲル
化させ流動性のない固体に変えることはできるが、ゲル
の強度は通常1kg/cm2以下であって、このゲルには経時
的な強度の増加はないため流水や地盤の変動に対する耐
久性は期待できない。Therefore, the use of colloidal silica containing substantially no or no alkali metal salt has been attracting attention, but metal salts as an electrolyte can convert colloidal silica into a solid without fluidity by gelling the colloidal silica. However, the strength of the gel is usually 1 kg / cm 2 or less, and since the strength of the gel does not increase over time, durability against running water and ground fluctuation cannot be expected.
また、耐久性に実績のあるセメント物質と、セメント
の耐久性に対して有害物質を実質的に含まないコロイダ
ルシリカの２成分より成る注入剤は、耐久性注入剤とし
て期待されている。しかしコロイダルシリカは早強性と
いう点で水ガラスに劣りなんらかの改良が必要とされて
いる。セメントにゼオライトを添加する方法は特公平２
−8981公報に記載されているが、記載の方法ではコロイ
ダルシリカや水ガラスのような初期ゲル生成物質がない
ためモルタル状でしか使用できず注入剤にはならない。In addition, a filler composed of two components, a cement substance having a proven durability and a colloidal silica substantially containing no harmful substance to the durability of the cement, is expected as a durable filler. However, colloidal silica is inferior to water glass in terms of its early strength, and some improvement is required. How to add zeolite to cement
Although it is described in -8981, it can be used only in a mortar form and does not become an injectable because there is no initial gel-forming substance such as colloidal silica or water glass.
本発明者等は、以上の事実に注目して鋭意研究したと
ころ、驚くべきことに、水性コロイダルシリカ、セメン
トおよびアルミノシリケートからなる組成、またはこれ
に凝結調節剤を配合した組成の地盤注入剤が、優れた地
盤注入性能を発揮することを知見し、本発明を完成する
に至った。The present inventors have conducted intensive studies with attention to the above facts, and surprisingly, a ground injection agent having a composition composed of aqueous colloidal silica, cement and aluminosilicate, or a composition containing a coagulation controlling agent added thereto. And found that they exhibited excellent ground injection performance, and completed the present invention.
すなわち、本発明により提供される地盤注入剤は、水
性コロイダルシリカ、セメントおよびアルミノシリケー
ト、またはこれら成分に凝結調節剤を配合した組成から
なることを構成上の特徴とするものである。That is, the ground injection agent provided by the present invention is characterized in that it is composed of aqueous colloidal silica, cement and aluminosilicate, or a composition obtained by mixing a setting modifier with these components.
以下、本発明について詳述する。 Hereinafter, the present invention will be described in detail.
本発明に使用する水性コロイダルシリカは水ガラスを
原料としてイオン交換法、解膠法、酸中和法、電気透析
法等で製造され、製造法の例としては米国特許第257748
4号明細書、米国特許第3711419号明細書、米国特許第25
72578号明細書、特開昭52−33899号公報、米国特許第36
68088号明細書、特開平１−317115号公報等の方法があ
る。他にも、例えば米国特許第3650977号明細書や特公
昭46−7367号公報記載の金属シリコンの酸化による製法
や、米国特許第2951044号明細書や特開昭62−127216号
公報記載の微細シリカ粉末の水分散による製法のコロイ
ダルシリカも使用できる。The aqueous colloidal silica used in the present invention is produced from water glass as a raw material by an ion exchange method, a deflocculation method, an acid neutralization method, an electrodialysis method, and the like.
No. 4, U.S. Pat.No. 3,711,419, U.S. Pat.
No. 72578, JP 52-33899, U.S. Pat.
68088 and JP-A-1-317115. In addition, for example, a method of oxidizing metallic silicon described in U.S. Pat.No. 3,650,977 and JP-B-46-7367, and fine silica described in U.S. Pat. No. 2,951,044 and JP-A-62-127216 Colloidal silica produced by water dispersion of powder can also be used.
水性コロイダルシリカは、３〜100nmの平均粒子径を
有するものが使用できるが、粒子径の大きいものはゲル
強度が弱く平均径50nm以下がその意味では実用的であろ
う。市販品の標準グレードは平均径10〜20nmで、これは
実用できる。３〜10nmの小粒子グレードはゲル強度が高
く特に好ましい。さらに3nm以下の平均粒子径を有する
コロイダルシリカもあるが、このグレードは水ガラスの
ようにアルカリ安定化剤の含有量が多く本発明の目的に
は適合しがたい。As the aqueous colloidal silica, those having an average particle diameter of 3 to 100 nm can be used, but those having a large particle diameter have low gel strength and an average diameter of 50 nm or less would be practical in that sense. Standard grades of commercial products have an average diameter of 10-20 nm, which is practical. Small particle grades of 3-10 nm are particularly preferred because of their high gel strength. Further, there is colloidal silica having an average particle diameter of 3 nm or less, but this grade has a large content of an alkali stabilizer like water glass, and is not suitable for the purpose of the present invention.
水性コロイダルシリカは通常コロイドの安定化剤とし
て微量のアルカリイオン（または水素イオン）を含有す
るが、本発明で使用する水性コロイダルシリカのアルカ
リ含有量はSiO2/M2Oのモル比で５〜500のものが好まし
い。Aqueous colloidal silica usually contains a trace amount of alkali ion (or hydrogen ion) as a colloid stabilizer, and the alkali content of the aqueous colloidal silica used in the present invention is 5 to 5 in terms of SiO 2 / M 2 O molar ratio. 500 are preferred.
セメントとしてはポルトランドセメントが代表的であ
るが、本件はセメントの特性によって耐久性を持たせる
注入剤であるため、注入剤に要求される性能を具備した
セメントが使用されなくてはならないため、セメントの
種類を限定することはできない。例えば早強性を必要と
する場合には早強ポルトランドセメント、超早強セメン
ト、アルミナセメント、ジェットセメント等を使用する
ことができる。また発熱膨張をきらう場合には低熱セメ
ント、中庸熱セメント、長期耐水性のためには高炉セメ
ント、シリカセメント、フライアッシュセメントなどが
使用できる。また一般にはセメントとは言われないが水
硬性を有するセメント質の物質、例えば高炉スラグ、転
炉スラグ等の鉄鋼スラグの粉末もコロイダルシリカとの
反応が遅いという特性を利用してコロイダルシリカがゲ
ル化するまでの硬化時間（以下ゲルタイムと記す）の長
い注入剤には有利に使用できる。また石膏や消灰石は、
逆にゲルタイムが短くなりその様な注入が必要なときに
は有利に使用できる。特に好ましいセメントは、粒子の
90％以上が粒径0.1μ以上10μ以下の粒子よりなるセメ
ントで、このセメントは地盤中の空げきに良く浸透す
る。Portland cement is a typical example of cement.However, in this case, since cement is a filler that provides durability due to the properties of the cement, cement with the performance required for the filler must be used. Type cannot be limited. For example, when high strength is required, high strength Portland cement, ultra-high strength cement, alumina cement, jet cement and the like can be used. In addition, low heat cement, moderate heat cement, and blast furnace cement, silica cement, fly ash cement, and the like can be used for preventing long-term water resistance. In addition, cementitious substances which are not generally called cement but have hydraulic properties, for example, powder of iron and steel slag such as blast furnace slag and converter slag are also used to form colloidal silica by utilizing the characteristic that the reaction with colloidal silica is slow. It can be advantageously used for an injecting agent having a long curing time (hereinafter, referred to as gel time) until it is converted into a gel. In addition, plaster and dehydrated stone,
Conversely, when the gel time is short and such injection is necessary, it can be used advantageously. Particularly preferred cements are particulate
90% or more of the cement is composed of particles having a particle size of 0.1 μm or more and 10 μm or less.
アルミノシリケートとしては、ゼオライトや合成ゼオ
ライトの前駆体である非晶質アルミノシリケートが好適
に使用される。As the aluminosilicate, amorphous aluminosilicate which is a precursor of zeolite or synthetic zeolite is preferably used.
これらアルミノシリケートは、平均粒径が0.1〜10μ
ｍであり、且つ実質的に粒子の粒径の90％以上がこの範
囲にあるのが好ましい。These aluminosilicates have an average particle size of 0.1 to 10 μm.
m, and substantially 90% or more of the particle diameter is in this range.
ゼオライトとしては、各種のゼオライトが適用できる
が、例えばＡ型ゼオライト、Ｘ型ゼオライト、Ｙ型ゼオ
ライト、Ｐ型ゼオライト、又はモルデナイトから選ばれ
た合成ゼオライトの１種又は２種以上、特にＡ型ゼオラ
イトが工業的で有利である。また、他のゼオライトとし
てクリノプチロライトやモルデナイトのような天然ゼオ
ライトも使用できる。As the zeolite, various types of zeolites can be used. For example, one or two or more types of synthetic zeolites selected from A-type zeolites, X-type zeolites, Y-type zeolites, P-type zeolites, or mordenites, particularly A-type zeolites are used. Industrial and advantageous. Natural zeolites such as clinoptilolite and mordenite can also be used as other zeolites.
さらに、合成ゼオライトの前駆体である非晶質アルミ
ノシリケートは、ゲル状物質ではあるが、一般の天然又
は合成ゼオライトと同様に活性でカチオン交換能があ
り、特に製造履歴に限定はなく適用することができる。In addition, although amorphous aluminosilicate, a precursor of synthetic zeolite, is a gel substance, it has activity and cation exchange ability like general natural or synthetic zeolites, and there is no particular limitation on the production history. Can be.
これらのアルミノシリケートはナトリウムアルミノシ
リケートが機能的にも経済的にも好適に用いられるが、
要すれば、これと他の金属イオンとをイオン交換した特
にアルカリ土類金属アルミノシリケートを使用すること
ができる。For these aluminosilicates, sodium aluminosilicate is preferably used functionally and economically,
If necessary, an alkaline earth metal aluminosilicate obtained by ion-exchanging this with another metal ion can be used.
アルカリ土類金属イオンとしては、Mg2+、Ca2+、S
r2+、またはBa2+があるが、特にMg2+、Ca2+が工業的に
安価に使用でき好ましい。なお、アルカリ土類金属イオ
ン等のイオン交換量は特に限定する必要はなく、臨界的
ではない。Alkaline earth metal ions include Mg 2+ , Ca 2+ , S
There are r 2+ and Ba 2+, but Mg 2+ and Ca 2+ are particularly preferable because they can be used industrially at low cost. The amount of ion exchange of alkaline earth metal ions or the like need not be particularly limited and is not critical.
なお、このアルミノシリケートは粉末でもスラリーで
もよい。The aluminosilicate may be a powder or a slurry.
コロイダルシリカとセメントとゼオライトの使用割合
は、目的に応じて任意に決定できるが、コロイダルシリ
カのSiO2成分：セメント：ゼオライト：の比率（重量
比）は1:1〜50:0.1〜10が実用的であり、この範囲外で
は注入剤としては使用しにくい。The use ratio of colloidal silica, cement and zeolite can be arbitrarily determined according to the purpose, but the ratio (weight ratio) of SiO 2 component: cement: zeolite: of colloidal silica is practically 1: 1 to 50: 0.1 to 10 Outside of this range, it is difficult to use as an injection.
なお、凝固調節剤の量はセメント１部に対して多くと
も0.2部である。The amount of the coagulation regulator is at most 0.2 part per part of cement.
本発明に係る地盤注入剤は、以上の成分で構成される
が必要に応じて硬化反応を遅延するために、凝固調節剤
と呼ばれる薬剤を使用することができる。凝固調節剤は
特に限定するものではないが、例えばアルカリ金属炭素
塩、アルカリ金属重炭酸塩、アルカリ金属セスキ炭酸
塩、アルカリ金属リン酸塩などの無機塩またはクエン
酸、酒石酸、グルコン酸などのカルボン酸またはそのア
ルカリ金属塩が使用できる。また界面活性剤も使用でき
る。Although the ground injection agent according to the present invention is composed of the above components, an agent called a coagulation regulator can be used to delay the curing reaction as needed. The coagulation regulator is not particularly limited, but for example, an inorganic salt such as an alkali metal carbon salt, an alkali metal bicarbonate, an alkali metal sesquicarbonate, or an alkali metal phosphate, or a carboxylic acid such as citric acid, tartaric acid, or gluconic acid. Acids or their alkali metal salts can be used. Surfactants can also be used.
本発明に係る地盤注入剤の硬化反応に関する作用機構
は明確ではないが、恐らくは次のようなことが推定され
る。Although the mechanism of action of the ground injection agent according to the present invention relating to the curing reaction is not clear, it is presumed to be as follows.
すなわち、アルミノシリケートのイオン交換によるア
ルカリ金属イオン、アルカリ土類金属イオンの放出又は
吸着のためコロイダルシリカの穏やかなゲル化反応と水
硬反応が相乗的に作用する。このようなゲル化反応は、
微細なアルミノシリケート粒子がセメント粒子間に均一
に介在分散し、且つ結晶粒となって珪酸カルシウムなど
のアルカリ土類金属シリケート水和物の微細結晶を生成
せしめ、しかもその結晶粒子の偏在が実質的にないため
にセメント粒子の水硬反応と相俟って高強度化を発現す
る。That is, a mild gelling reaction and a hydraulic reaction of colloidal silica act synergistically to release or adsorb an alkali metal ion or an alkaline earth metal ion by ion exchange of aluminosilicate. Such a gelation reaction is
Fine aluminosilicate particles are uniformly interspersed and dispersed between cement particles, and become crystal grains to produce fine crystals of alkaline earth metal silicate hydrate such as calcium silicate, and the uneven distribution of the crystal particles is substantially Because of this, high strength is exhibited in combination with the hydraulic reaction of the cement particles.
以下に実施例を挙げて説明するが、ここでゲルタイム
とはコロイダルシリカ（表中Ａ液）にゲル化剤（表中Ｂ
液）を添加してから混合物が流動性を失うまでの時間
で、混合物の入ったビーカーを90度傾けても流下しなく
なる時点を測定した。ゲル化体の強度とはゲル化前の混
練物を40mmφ×40mmHの型枠に入れてゲル化させ所定時
間後に取り出してアームスラー型強度試験機を用いて測
定した一軸圧縮強度である。In the following, the present invention will be described with reference to Examples. Here, the gel time means that a gelling agent (B in the table) is added to colloidal silica (A in the table).
Liquid) was added, and the time from when the mixture lost its fluidity to when the beaker containing the mixture did not flow down even at 90 ° was measured. The strength of the gelled body is a uniaxial compressive strength measured by using an arm slur type strength tester in which a kneaded material before gelation is put into a mold of 40 mmφ × 40 mmH, gelled, taken out after a predetermined time, and measured.
実施例１〜８、比較例１〜４ 表１のＡ−１に示したコロイダルシリカと、表２のＢ
−１、２に示したＡ型ゼオライトを使用して、表３に示
した配合のＡ液とＢ液（スラリー）を作成し、Ａ液とＢ
液を混合しマグネチックスターラーで撹拌を続けてゲル
タイムを測定した。またゲルタイムの約10秒前に注入剤
を型枠に流し込んで強度測定用の供試体を作成した。Examples 1 to 8, Comparative Examples 1 to 4 Colloidal silica shown in A-1 in Table 1 and B in Table 2
Using the zeolite A shown in Tables 1 and 2, a liquid A and a liquid B (slurry) having the composition shown in Table 3 were prepared.
The liquid was mixed, and stirring was continued with a magnetic stirrer to measure a gel time. Approximately 10 seconds before the gel time, the injection was poured into the mold to prepare a test specimen for strength measurement.
を測定した。その結果を表３に示す。Was measured. Table 3 shows the results.
実施例９〜15、比較例５ 表１のＡ−２、Ａ−３に示したコロイダルシリカと、
表２のＢ−１、Ｂ−２、Ｂ−３、Ｂ−４、Ｂ−５、Ｂ−
６に示した各種ゼオライト又は非晶質アルミノシリケー
トを使用して、表４に示した配合のＡ液とＢ液（スラリ
ー）を作成し、Ａ液とＢ液を混合しマグネチックスター
ラーで撹拌を続けてゲルタイムを測定した。またゲルタ
イムの約10秒前に注入剤を型枠に流し込んで強度測定用
の供試体を作成した。その結果を表４に示す。Examples 9 to 15, Comparative Example 5 Colloidal silica shown in A-2 and A-3 of Table 1,
B-1, B-2, B-3, B-4, B-5, B- of Table 2
Using the various zeolites or amorphous aluminosilicates shown in Table 6, liquid A and liquid B (slurry) having the composition shown in Table 4 were prepared, and liquid A and liquid B were mixed and stirred with a magnetic stirrer. Subsequently, the gel time was measured. Approximately 10 seconds before the gel time, the injection was poured into the mold to prepare a test specimen for strength measurement. Table 4 shows the results.
実施例16〜19、比較例６ 前記実施例のポルトランドセメントを日鐡SF〔日鐡セ
メント（株）製品〕に代えて、表１のＡ−１に示したコ
ロイダルシリカと、表２のＢ−２、Ｂ−３、Ｂ−５、Ｂ
−６に示した各種ゼオライト又は非晶質アルミノシリケ
ートを使用して、表５に示した配合のＡ液とＢ液（スラ
リー）を作成し、Ａ液とＢ液を混合しマグネチックスタ
ーラーで撹拌を続けてゲルタイムを測定した。またゲル
タイムの約10秒前に注入剤を型枠に流し込んで強度測定
用の供試体を作成した。その結果を表５に示す。Examples 16 to 19, Comparative Example 6 The colloidal silica shown in A-1 in Table 1 and the B- in Table 2 were used in place of the Nippon SF (product of Nittetsu Cement Co.) in place of the Portland cement of the above example. 2, B-3, B-5, B
Using various zeolites or amorphous aluminosilicates shown in -6, liquid A and liquid B (slurry) having the composition shown in Table 5 were prepared, and liquid A and liquid B were mixed and stirred with a magnetic stirrer. , And the gel time was measured. Approximately 10 seconds before the gel time, the injection was poured into the mold to prepare a test specimen for strength measurement. Table 5 shows the results.
〔発明の効果〕 本発明は現在注目されているコロイダルシリカセメン
ト系の注入剤がかかえている問題を解決し、任意なゲル
タイムの調整と高強度の地盤硬化能を有していることか
ら、地下工事等での注入施工の信頼性を向上させること
ができる。 [Effects of the Invention] The present invention solves the problem of colloidal silica cement-based injectables that are currently attracting attention, and has an arbitrary gel time adjustment and high-strength ground hardening ability. It is possible to improve the reliability of the injection work in the construction and the like.
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｃ０９Ｋ 103:00 (56)参考文献 特開 昭59−184283（ＪＰ，Ａ) 特開 昭63−274644（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C09K 17/12,17/10,17/02 C04B 28/24 E02D 3/12Continuation of the front page (51) Int.Cl. 6 Identification symbol FI // C09K 103: 00 (56) References JP-A-59-184283 (JP, A) JP-A-63-274644 (JP, A) (58 ) Surveyed field (Int.Cl. 6 , DB name) C09K 17 / 12,17 / 10,17 / 02 C04B 28/24 E02D 3/12
Claims (5)
ルミノシリケートよりなることを特徴とする地盤注入
剤。1. A ground injection agent comprising aqueous colloidal silica, cement and aluminosilicate.
ノシリケートおよび凝結調節剤によりなることを特徴と
する地盤注入剤。2. A ground injection agent comprising aqueous colloidal silica, cement, aluminosilicate and a setting modifier.
0μｍの範囲であるゼオライトＡ、ゼオライトＰ又はゼ
オライトＸから選らばれた合成ゼオライトである請求項
１又は２記載の地盤注入剤。3. The aluminosilicate has an average particle size of 0.1-1.
The ground injection agent according to claim 1 or 2, which is a synthetic zeolite selected from zeolite A, zeolite P or zeolite X having a range of 0 µm.
前駆体である非晶質アルミノシリケート粉末である請求
項１又は２記載の地盤注入剤。4. The ground injection agent according to claim 1, wherein the aluminosilicate is an amorphous aluminosilicate powder which is a precursor of a synthetic zeolite.
比で水性コロイダルシリカ（SiO2換算）：セメント：ア
ルミノシリケート：凝結調節剤＝1:1〜50:0.1〜10:0〜
0.2の割合の組成を有する地盤注入剤。5. The soil injection agent according to claim 1 or 2, wherein the weight ratio is aqueous colloidal silica (in terms of SiO 2 ): cement: aluminosilicate: setting regulator = 1: 1 to 50: 0.1 to 10: 0 to
Ground injection with a composition of 0.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2211868A JP2853773B2 (en) | 1990-08-10 | 1990-08-10 | Ground injection agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2211868A JP2853773B2 (en) | 1990-08-10 | 1990-08-10 | Ground injection agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04175397A JPH04175397A (en) | 1992-06-23 |
| JP2853773B2 true JP2853773B2 (en) | 1999-02-03 |
Family
ID=16612945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2211868A Expired - Lifetime JP2853773B2 (en) | 1990-08-10 | 1990-08-10 | Ground injection agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2853773B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002029812A (en) * | 2000-07-14 | 2002-01-29 | Akio Henmi | Method of reducing eluting quantity of heavy metal in cement-based solidified soil using artificial zeolite |
-
1990
- 1990-08-10 JP JP2211868A patent/JP2853773B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04175397A (en) | 1992-06-23 |
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