JPH0366794A - Chemical for injecting into ground - Google Patents
Chemical for injecting into groundInfo
- Publication number
- JPH0366794A JPH0366794A JP20261189A JP20261189A JPH0366794A JP H0366794 A JPH0366794 A JP H0366794A JP 20261189 A JP20261189 A JP 20261189A JP 20261189 A JP20261189 A JP 20261189A JP H0366794 A JPH0366794 A JP H0366794A
- Authority
- JP
- Japan
- Prior art keywords
- silica sol
- acidic
- silicic acid
- acidic silica
- water glass
- 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
- 239000000126 substance Substances 0.000 title claims abstract description 10
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 62
- 230000002378 acidificating effect Effects 0.000 claims abstract description 45
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 9
- 150000007513 acids Chemical class 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 7
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 6
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 44
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000000376 reactant Substances 0.000 claims description 6
- 239000000084 colloidal system Substances 0.000 abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 43
- 238000001879 gelation Methods 0.000 description 23
- 239000000377 silicon dioxide Substances 0.000 description 20
- 239000011440 grout Substances 0.000 description 15
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 230000035699 permeability Effects 0.000 description 8
- 238000009472 formulation Methods 0.000 description 7
- 239000000499 gel Substances 0.000 description 6
- 238000002386 leaching Methods 0.000 description 6
- 238000007596 consolidation process Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000011882 ultra-fine particle Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000011041 water permeability test Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は珪酸コロイド溶液と酸性シリカゾルとからなる
地盤注入用薬液に係り、特に中性近辺で比較的長い時間
でゲル化し、固結物の耐久性にすぐれ、かつ浸透性がよ
く、固結強度が大きく、地下水の汚染のない公害防止に
すぐれた地盤注入用薬液に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a chemical solution for ground injection consisting of a silicic acid colloid solution and an acidic silica sol, which gels in a relatively long period of time especially near neutrality and forms a solidified product. This invention relates to a chemical solution for ground injection that has excellent durability, good permeability, high consolidation strength, and excellent pollution prevention without contaminating groundwater.
さらに、無機塩類、アルカリ剤あるいは酸を添加するこ
とによりゲル時間の調整を可能にし、またセメントの混
合により強固なるセメントグラウトをうることができる
。Furthermore, the gel time can be adjusted by adding inorganic salts, alkaline agents, or acids, and a stronger cement grout can be obtained by mixing cement.
従来の水ガラスを用いたグラウトは、水ガラスと酸性反
応剤からなり、強アルカリ領域で固結するものであり、
浸透性に劣り、ゲル化時間を長くすることができず、し
かも高強度を得ることができず、またアルカリが溶脱す
るおそれがあるため地下水をアルカリ性にし、かつアル
カリによるシリカの溶脱のため耐久性が得られなかった
。その改良法として水ガラスと酸性反応剤を混合して得
られる酸性シリカゾルと塩基性反応剤により弱酸性から
弱アルカリ領域で固結せしめてアルカリの逸脱防止と強
度の増加がはかられている。しかし高強度を得るために
水ガラス濃度を高くするとゲル化時間が短くなり、長い
ゲル化時間を得るためにはＰＨを強酸性にしなければな
らず、より一層の強度増加をはかることは不可能であっ
た。またゲルの収縮現象がみられるため粗い土層に注入
した場合長期的に透水性の低下が生ずるので恒久性グラ
ウトとしては不充分である。Conventional grout using water glass consists of water glass and an acidic reactant, and solidifies in a strongly alkaline region.
It has poor permeability, cannot prolong gelation time, cannot obtain high strength, and has a risk of alkaline leaching, making groundwater alkaline, and is durable because silica is leached by alkali. was not obtained. As an improved method, an acidic silica sol obtained by mixing water glass and an acidic reactant and a basic reactant are used to solidify in the weakly acidic to weakly alkaline range, thereby preventing the alkali from escaping and increasing the strength. However, increasing the water glass concentration in order to obtain high strength will shorten the gelation time, and in order to obtain a long gelation time, the pH must be made strongly acidic, making it impossible to further increase the strength. Met. Furthermore, due to gel shrinkage phenomenon, water permeability decreases over a long period of time when injected into coarse soil layers, making it unsatisfactory as a permanent grout.
水ガラスをアルカリをイオン交換樹脂処理で除き、シリ
カゾルを増粒して弱アルカリ性で安定化した超微粒子の
珪酸コロイド溶液を用いて、これに酸、塩、セメント等
を加えて一定時間後にゲル化せしめる注入材も開発され
ている。このグラウトは長期にわたって強度増加の現象
を示し、シリカの溶脱もほとんどなく、極めて耐久性に
すぐれている。しかし初期強度が小さく、初期の強度を
高くするためにはシリカ分の濃度を濃厚にする必要があ
り、かつ高強度に達するまでに長い年月を要する。さら
にイオン交換樹脂処理を行うため高濃度の配合を要し、
経済的にも問題がある。The alkali of water glass is removed by ion exchange resin treatment, the silica sol is increased, and a silicic acid colloid solution with ultrafine particles stabilized in weak alkalinity is used. Acid, salt, cement, etc. are added to this solution, and it gels after a certain period of time. Injectable materials have also been developed. This grout exhibits a phenomenon of strength increase over a long period of time, has almost no leaching of silica, and is extremely durable. However, the initial strength is low, and in order to increase the initial strength, it is necessary to increase the concentration of silica, and it takes a long time to reach high strength. Furthermore, it requires a highly concentrated formulation to perform ion exchange resin treatment.
There are also economic problems.
本発明は、基礎地盤の支持力の増加、地山の強化、堤防
・トンネル等の止水工事等の恒久性を要する目的、さら
に注入後数年後に掘削するような長期仮設工事において
も、もちろん適用でき、従来のグラウト以上に浸透性が
よく、固結強度が一層すぐれ二次汚染のない恒久性の地
盤注入用薬液を提供するものである。The present invention can of course be used for purposes that require permanence such as increasing the bearing capacity of the foundation ground, strengthening the ground, and water stoppage work for embankments, tunnels, etc., and also for long-term temporary construction work such as excavation several years after pouring. The purpose of the present invention is to provide a permanent chemical solution for ground injection that can be applied, has better permeability than conventional grouts, has better consolidation strength, and is free from secondary contamination.
珪酸コロイド溶液は水ガラスのアルカリ分をイオン交換
樹脂により除いた超微粒子のシリカ溶液であり、これと
酸性シリカゾルを組み合わせることにより、前記の目的
を達成することを特徴とし、必要に応じてこの系に無機
塩類・アルカリ剤あるいは酸の添加によりゲル化時間の
調整をはかることができ、セメントの混合により従来の
セメント系グラウトの強度を増加することができる。The silicic acid colloid solution is a silica solution of ultrafine particles obtained by removing the alkali content of water glass using an ion exchange resin, and is characterized by achieving the above objective by combining this with acidic silica sol. The gelation time can be adjusted by adding inorganic salts, alkaline agents, or acids to the grout, and the strength of conventional cement grout can be increased by adding cement.
酸性シリカゾルを用いたグラウトも珪酸コロイド溶液を
用いたグラウトも、ともに公知であるが本発明はこれら
を組み合わせることにより酸性シリカゾルは珪酸コロイ
ド溶液によってゲル化の方向に移行するとともに、珪酸
コロイド溶液は酸性シリカゾルによってゲル化の方向に
移行して、この珪酸コロイドのシリカの粒径は大きく、
酸性シリカゾルのシリカ粒子は小さくこの両者を組み合
わせてゲル化させると酸性シリカゾル中のシリカ分と珪
酸コロイド溶液中のシリカ分が互いに相乗的に結合して
、密実な構造の形成することを見出し、これによって初
期強度・長期強度ともにすぐれ、シリカ分の溶脱・ゲル
の収縮はほとんどみられず、従って強度、止水性からみ
て極めてずぐれこ固結体を得ることができ、本発明を完
成した。Both grout using acidic silica sol and grout using silicic acid colloid solution are known, but by combining these, the acidic silica sol is transferred to gelation by the silicic acid colloid solution, and the silicic acid colloid solution is The silica sol moves toward gelation, and the silica particle size of this silicic acid colloid is large.
We discovered that the silica particles in acidic silica sol are small and when the two are combined to form a gel, the silica in the acidic silica sol and the silica in the silicate colloid solution combine synergistically to form a dense structure. As a result, it was possible to obtain a solidified body with excellent initial strength and long-term strength, with almost no leaching of the silica component or shrinkage of the gel, and therefore an extremely loose solidified body in terms of strength and water-stopping properties, thus completing the present invention.
本発明は酸性シリカゾルグラウトよりも濃厚なシリカを
用いて、しかも長いゲル化時間でゲル化せしめ高強度を
得ることができる。また珪酸コロイドを用いたグラウト
よりも低いシリカ濃度で高い初期強度と高い長期強度さ
らに低粘性のため優れた浸透性を得ることができる。こ
の系に無機塩類、アルカリ剤、酸のいずれか或いは複数
を添加するとゲル化時間の調整をはかることができる。The present invention uses silica that is more concentrated than acidic silica sol grout, and can be gelled in a longer gelation time to obtain high strength. Furthermore, it is possible to obtain high initial strength, high long-term strength, and low viscosity with a lower silica concentration than grout using silicic acid colloid, and excellent permeability due to the low viscosity. By adding one or more of inorganic salts, alkaline agents, and acids to this system, the gelation time can be adjusted.
またセメントの混合は、この系の高濃度シリカとの相乗
作用で極めて高強度のグラウトとすることができる。Furthermore, the cement mixture can be used synergistically with the high concentration of silica in this system to produce an extremely high strength grout.
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.
１、使用酸性シリカゾル （１）使用水ガラス 次の組成、物性からなる３号水ガラスを使用する。1. Acidic silica sol used (1) Water glass used No. 3 water glass having the following composition and physical properties is used.
比重（２０℃）： １．４１２、Ｓ、ｉｏ、：２８．２
９％Ｎａ２Ｏ：９．９４％、 ｎ（モル比）：２．９４
粘度（２５℃）：８０ｃｐｓ
（２〉酸性シリカゾルの配合
表−１に示す２種類の配合（１０００ｍ ｌ！当り）に
かかる酸性シリカゾルを使用する。Specific gravity (20°C): 1.412, S, io,: 28.2
9% Na2O: 9.94%, n (molar ratio): 2.94
Viscosity (25°C): 80 cps (2> Acidic silica sol according to the two types of formulations (per 1000ml!) shown in Acidic silica sol formulation table-1 are used.
表−１
２、使用珪酸コロイド溶液
珪酸コロイド溶液は水ガラスのアルカリ分をイオン交換
樹脂によって除去してシリカ溶液を安定化した超微粒子
シリカ溶液で、次の組成、物性のものを使用する。Table 1 2. Silicic acid colloid solution used The silicic acid colloid solution is an ultrafine particle silica solution obtained by removing the alkali content of water glass with an ion exchange resin to stabilize the silica solution, and has the following composition and physical properties.
比重（２５℃）：１．２１２ 、Ｓ ｉ ０２ ：
３０゜６％Ｎ ａ ２０： ０．３９％、 ＰＨ：１
０．ロ平均粒径：１０〜２０ｒｎμ
粘度（２５℃）：＜１５ｃｐｓ
３、酸性シリカゾル−水ガラス系
酸性シリカゾルとして表−１の（ｒｊ）と、硬化剤とし
て水ガラスを使用した系についてゲル化時間、Ｐｌ（お
よびＳｉＯ２の量を第１図に示す。Specific gravity (25°C): 1.212, S i 02:
30°6%N a 20: 0.39%, PH: 1
0. b Average particle size: 10-20rnμ Viscosity (25°C): <15cps 3. Acidic silica sol-water glass system (rj) in Table 1 as an acidic silica sol, and gelation time for a system using water glass as a hardening agent. The amounts of Pl (and SiO2) are shown in FIG.
４、酸性シリカゾル−塩基性反応剤系
酸性シリカゾルとして表−１の（ロ）と、硬化剤として
水酸化マグネシウムを使用した系に一ついてゲル化時間
、ＰＨおよびＳ １０ ｘの量を第２図に示す。4. Acidic silica sol-basic reactant system Figure 2 shows the gelation time, pH, and amount of S 10 Shown below.
硬化剤として水酸化マグネシウムのほかに水酸化カルシ
ウム、炭酸カルシウム、炭酸水素ナトリウム、炭酸ナト
リウム、りん酸系塩類その他の塩基性反応剤についても
同じような傾向をとる。In addition to magnesium hydroxide as a hardening agent, a similar tendency is observed for other basic reactants such as calcium hydroxide, calcium carbonate, sodium bicarbonate, sodium carbonate, phosphate salts, and others.
５、珪酸コロイド溶液−硬化剤系
珪酸コロイド溶液とその硬化剤として塩化ナトリウム、
酸性硫酸ナトリウムを使用した系につい゛Ｃゲル化時間
、ＰＨおよびＳ＋Ｏｉの量を表−２に示す。5. Silicic acid colloid solution - hardening agent system Silicic acid colloid solution and sodium chloride as its hardening agent,
Table 2 shows the gelation time, pH, and amount of S+Oi for the system using acidic sodium sulfate.
表−２
６、珪酸コロイド溶液−酸性シリカゾル系本発明にかか
る珪酸コロイド溶液と表−１の酸性シリカゾルとからな
る系についてゲル化時間、ＰＨおよび５ｉｎｓの量を第
３図（珪酸コロイド溶液（容量％）、第４図（珪酸コロ
イド溶液３容量％）、第５図（珪酸コロイド溶液５容量
％）、第６図（珪酸コロイド溶液１０容量％）、第７図
（珪酸コロイド溶液２０容量％）、第８図（珪酸コロイ
ド溶液３０容量％）、第９図（珪酸コロイド溶液５０容
量％）に示す。Table 2 6. Silicic acid colloidal solution - acidic silica sol system Figure 3 shows the gelation time, pH and amount of 5ins for the system consisting of the silicic acid colloidal solution according to the present invention and the acidic silica sol of Table 1. %), Figure 4 (3% by volume of silicate colloidal solution), Figure 5 (5% by volume of silicate colloidal solution), Figure 6 (10% by volume of silicate colloidal solution), Figure 7 (20% by volume of silicate colloidal solution) , FIG. 8 (silicic acid colloid solution 30% by volume) and FIG. 9 (silicic acid colloidal solution 50% by volume).
７、珪酸コロイド溶液−酸性シリカゾル−助剤系第７図
の系に反応助剤として塩化ナトリウム２ｇ１水酸化カル
シウム０．２ｇ、１０％硫酸１ｍＡをそれぞれ添加した
系についてゲル化時間を第１０図に示す。7. Silicic acid colloid solution - acidic silica sol - auxiliary agent system Figure 10 shows the gelation time for the system in which 2 g of sodium chloride, 0.2 g of calcium hydroxide, and 1 mA of 10% sulfuric acid were added as reaction auxiliaries to the system shown in Figure 7. show.
助剤としてはアルカリ金属・アルカリ土類金属・アルミ
ニウムの炭酸塩、酸性炭酸塩、硫酸塩、酸性硫酸塩、塩
化物等、アルカリ剤としては、アルカリ金属・アルカリ
土類金属・アルミニウムの水酸化物、または水中で水酸
化物となるこれらの金属酸化物、酸としては硫酸その他
の鉱酸においてもゲル化時間の変化調整をはかるのに使
用できる。Auxiliary agents include carbonates, acidic carbonates, sulfates, acidic sulfates, chlorides, etc. of alkali metals, alkaline earth metals, and aluminum; alkaline agents include hydroxides of alkali metals, alkaline earth metals, and aluminum. , or these metal oxides that form hydroxides in water, as well as sulfuric acid and other mineral acids, can also be used to adjust the change in gelation time.
８、固結体の物性
上記の系のうち代表的なものとして次の表−３に示す配
合にかかる系について物性を測定する。8. Physical Properties of Solids Among the above systems, the physical properties are measured for the systems according to the formulations shown in Table 3 below.
（１）固結強度
表−３の配合にかかる系について標準砂固結体を作成し
て、ポリ塩化ビニルフィルムで包み、密閉状態で養生し
た一軸圧縮強度を表−４に示す。(1) Consolidation Strength Table 4 shows the unconfined compressive strength of standard sand compacts prepared for the system according to the formulation in Table 3, wrapped in polyvinyl chloride film, and cured in a sealed state.
（２）容積変化および溶解シリカ
表−３の配合にかかる系についてホモゲルを作成して水
中に保存した時の容積変化を溶出したシリカを測定した
結果を表−５、表−６にそれぞれ示す。(2) Volume change and dissolved silica The results of measuring the volume change of eluted silica when a homogel was prepared and stored in water for the system according to the formulation in Table 3 are shown in Tables 5 and 6, respectively.
表−４ 表−５ （−は容積の収縮、 十は容積の増加を示す） く３） 透水試験 表 ３の配合にかかる系について標準砂固結体を作成して、 １ ｋｇ ｆ ／ ｃｒｌの水頭で連続透水を行い、 透水係数を求めた結思を表 ７に示す。Table-4 Table-5 (- is volume contraction, (10 indicates increase in volume) 3) Water permeability test table Create a standard sand compact for the system related to the formulation in 3. Continuous water permeation with a water head of 1 kg f/crl, Expressing the results of determining the hydraulic conductivity 7.
表−６
表−７
９、酸性シリカゾル−珪酸コロイド溶液−セメント系グ
ラウト
酸性シリカゾルと珪酸コロイド溶液にセメントを混合し
たセメントグラウトについて、対照の酸性シリカゾル−
水ガラス−セメントの系および珪酸コロイド溶液−セメ
ントの系と対比してゲル化時間と固結体の水中養生にお
ける固結強度を測定した結果を表−８に示す。Table 6 Table 7 9. Acidic silica sol - silicic acid colloid solution - cement grout Regarding cement grout in which cement is mixed with acidic silica sol and silicic acid colloidal solution, the control acidic silica sol -
Table 8 shows the results of measuring the gelation time and the consolidation strength of the solidified bodies during water curing in comparison with the water glass-cement system and the silicate colloid solution-cement system.
以上の実施例の資料から本発明については次のような効
果が明らかに認められる。From the data of the above examples, the following effects of the present invention are clearly recognized.
１、ゲル化時間
対照の酸性シリカゾル系のゲル化は、ゲル化時間の変動
が激しい（第１図、第２ｒＩＡ参照ニゲル化時間は対数
目盛）。従って酸性シリカゾル、硬化剤の調整に微妙に
影響されてゲル化時間の調整は極めて困難である。特に
数分から致ｌＯ分の調整は事実上不可能に近い。1. Gelation time The gelation time of the acidic silica sol system used as a control had a large fluctuation (see Fig. 1 and 2rIA, the gelation time is on a logarithmic scale). Therefore, it is extremely difficult to adjust the gelation time because it is delicately influenced by the adjustment of the acidic silica sol and curing agent. In particular, it is virtually impossible to make adjustments over several minutes to 10 minutes.
これに比べて本発明にかかる系ではＳｔｏｗの濃度を高
くしても数分から数１００分にわたるゲル化時間の調整
が比較的容易である（第３．４．５．６．７．８．９図
参照）。従って優れた浸透性が期待でき、かつゲル化時
間が１００分以内ぐらいでのＰＨ領領域はほぼ中性に近
い状態にあることから、環境保全の点からも好ましい。In contrast, in the system according to the present invention, it is relatively easy to adjust the gelation time from several minutes to several hundred minutes even if the Stow concentration is increased (Section 3.4.5.6.7.8.9 (see figure). Therefore, excellent permeability can be expected, and the pH region is almost neutral within about 100 minutes, which is preferable from the viewpoint of environmental conservation.
また、無機塩類、アルカリ剤、酸の少量の添加で、さら
にゲル化時間の調整をはかることができる。（第１０図
）
２゜固結強度
珪酸コロイド溶液−硬化剤の系（以下「珪酸コロイド溶
液系」と記す）では３ｉ０ｉの濃度を大きくできるので
（表−４の血４．５参照）、酸性シリカゾル−硬化剤の
系（以下「酸性シリカゾル系」と記す）に比べて強度を
大きくすることができる（表−４の弘１．２．３参照）
が、初期強度は逆に低い弱点をもっている。Furthermore, the gelation time can be further adjusted by adding small amounts of inorganic salts, alkaline agents, and acids. (Figure 10) 2° Consolidation Strength In the silicic acid colloid solution-hardening agent system (hereinafter referred to as ``silicic acid colloid solution system''), the concentration of 3i0i can be increased (see Blood 4.5 in Table 4), so acidic The strength can be increased compared to the silica sol-curing agent system (hereinafter referred to as "acidic silica sol system") (see Hiroshi 1.2.3 in Table 4).
However, it has the disadvantage of low initial strength.
本発明にかかる系（表−４の＆６〜１５〉では、珪酸コ
ロイド溶液の少量の併用で初期強度から高く、かつ同程
度の５ｉＯｚ濃度で比較してみても全般に高強度で珪酸
コロイド溶液と酸性シリカゾルとのゲル化反応に相乗作
用が働いて、両者の長所のみを発揮していることがわか
る。In the system according to the present invention (&6 to 15 in Table 4), the initial strength was increased by using a small amount of silicate colloid solution, and even when compared with the same 5iOz concentration, the strength was generally higher than that of silicate colloid solution. It can be seen that there is a synergistic effect in the gelation reaction with the acidic silica sol, bringing out only the advantages of both.
３、容積変化および溶解シリカ
表−５、表−６のＮα１〜３から酸性シリカゾル系は容
積の収縮ならびに５ｉＯｚの溶脱が可成りみられるのに
対し、表−５、表−６のＮ［Ｌ４．５の珪酸コロイド溶
液系では容積変化、５ｉＯｚの溶脱はほとんどみられな
い。本発明にかかる系では珪酸コロイド溶液の少量の併
用でも、珪酸コロイド溶液系の影響を強くうけて容積変
化、５１０２の溶脱はほとんどみられない。3. Volume change and dissolved silica From Nα1 to Nα3 in Tables 5 and 6, the acidic silica sol system shows significant volume shrinkage and leaching of 5iOz, whereas N[L4 in Tables 5 and 6] In the silicic acid colloid solution system of .5, almost no change in volume or leaching of 5 iOz is observed. In the system according to the present invention, even if a small amount of silicic acid colloid solution is used in combination, volume change and leaching of 5102 are hardly observed due to the strong influence of the silicic acid colloid solution system.
４、透水係数
本発明にかかる系では珪酸：Ｊロイド溶液系の影響を強
くうけて、常に一定した低い透水係数を示している。こ
れに対して酸性シリカゾル系では当初から透水係数は高
く、かつ日数経過の中途からさらに高く経過している。4. Hydraulic permeability coefficient The system according to the present invention is strongly influenced by the silicic acid: J Lloyd solution system, and always exhibits a constant low hydraulic permeability coefficient. On the other hand, in the acidic silica sol system, the hydraulic conductivity was high from the beginning, and increased even higher from the middle of the day.
（表−７参照）５、セメント系グラウト
表−８から本発明にかかる系では酸性シリカゾル系より
も極めて高強度であり、また珪酸コロイド系ど比較して
も遜色はなくむしろ優れていることがわかる。(See Table 7) 5. Cement-based grout Table 8 shows that the system according to the present invention has extremely higher strength than the acidic silica sol system, and is comparable to, or even superior to, silicate colloid systems. Recognize.
６、相乗効果
以上総合して本発明は酸性シリカゾルと珪酸コロイド溶
液のもつ短所を互いに打消して、両者のもつ長所のみを
相乗的に発揮できるグラウトで耐久性に極めて優れてい
ることがうかがえる。6. Synergistic effect Overall, it can be seen that the present invention is a grout that can synergistically exhibit only the advantages of both, by canceling out the disadvantages of acidic silica sol and silicic acid colloid solution, and is extremely durable.
第１図は酸性シリカゾルと水ガラスの系、第２図は酸性
シリカゾルと水酸化マグネシラ去の系、第３図〜第９図
は珪酸コリイド溶液と酸性シリカゾルの系の、各ゲル化
時間、ＰＨおよびＳｉ○。
含有量を表したグラフを示し、第１０図は珪酸コロイド
溶液と酸性シリカゾルに各種助剤を添加ｉ５た系のゲル
化時間を表したグラフを示す。Figure 1 shows the system of acidic silica sol and water glass, Figure 2 shows the system of acidic silica sol and magnesila hydroxide, and Figures 3 to 9 show the system of silicate colloid solution and acidic silica sol. and Si○. A graph showing the content is shown, and FIG. 10 is a graph showing the gelation time of a system in which various auxiliaries were added to a silicic acid colloid solution and an acidic silica sol.
Claims (3)
リカゾルと、水ガラスをイオン交換樹脂処理によってア
ルカリをほとんど除去してえられる珪酸のコロイド溶液
とからなる地盤注入用薬液。(1) A chemical solution for ground injection consisting of an acidic silica sol obtained by mixing water glass and an acidic reactant, and a colloidal solution of silicic acid obtained by removing most of the alkali from water glass by treating it with an ion exchange resin.
さらに無機塩類、アルカリ剤および酸の群から選ばれた
一種またはそれ以上を含有してなる地盤注入用薬液。(2) In the chemical solution for ground injection according to claim 1,
A chemical solution for ground injection further containing one or more selected from the group of inorganic salts, alkaline agents and acids.
おいて、さらにセメントを含有してなる地盤注入用薬液
。(3) A chemical solution for ground injection according to claim 1 or 2, further comprising cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202611A JPH0674421B2 (en) | 1989-08-04 | 1989-08-04 | Ground injection chemical |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202611A JPH0674421B2 (en) | 1989-08-04 | 1989-08-04 | Ground injection chemical |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0366794A true JPH0366794A (en) | 1991-03-22 |
| JPH0674421B2 JPH0674421B2 (en) | 1994-09-21 |
Family
ID=16460276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1202611A Expired - Lifetime JPH0674421B2 (en) | 1989-08-04 | 1989-08-04 | Ground injection chemical |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0674421B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021185301A (en) * | 2018-07-31 | 2021-12-09 | 強化土エンジニヤリング株式会社 | Ground injection method and injection material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108002394B (en) * | 2016-11-01 | 2019-07-09 | 航天特种材料及工艺技术研究所 | A kind of preparation method of silica solution |
-
1989
- 1989-08-04 JP JP1202611A patent/JPH0674421B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021185301A (en) * | 2018-07-31 | 2021-12-09 | 強化土エンジニヤリング株式会社 | Ground injection method and injection material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0674421B2 (en) | 1994-09-21 |
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