JP2791071B2 - Injection material - Google Patents
Injection materialInfo
- Publication number
- JP2791071B2 JP2791071B2 JP63321962A JP32196288A JP2791071B2 JP 2791071 B2 JP2791071 B2 JP 2791071B2 JP 63321962 A JP63321962 A JP 63321962A JP 32196288 A JP32196288 A JP 32196288A JP 2791071 B2 JP2791071 B2 JP 2791071B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- water glass
- slag
- solidifying agent
- weight
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、注入性が良く、かつ、強度発現のよい注入
材料に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an injectable material having good injectability and excellent strength.
従来、水ガラスに固化剤を添加することにより、小さ
な空隙にもよく浸透する注入材料が開発されていた。Conventionally, an injection material that penetrates well into small voids by adding a solidifying agent to water glass has been developed.
しかしながら、この注入材料は、水ガラスと固化剤に
より生成するゲルの強度が弱く、水に溶けるという欠点
があり、そのため最も改良を必要とする地盤強度の弱い
場所では使用できないという課題があつた（例えば、特
開昭61−174293号公報）。However, this injection material has a drawback that the strength of the gel formed by the water glass and the solidifying agent is weak, and the gel is soluble in water. Therefore, there is a problem that it cannot be used in a place where the ground strength that requires the most improvement is weak. For example, JP-A-61-174293.
本発明者らは、上記課題を解消すべく種々検討した結
果、水ガラスに特定の高炉スラグを固化剤と併用するこ
とにより、上記課題が解決できる知見を得て本発明を完
成したものである。Means for Solving the Problems The present inventors have conducted various studies to solve the above problems, and as a result, obtained a finding that can solve the above problems by using a specific blast furnace slag together with a solidifying agent in water glass, and completed the present invention. .
即ち、本発明は、水ガラス、固化剤、及びブレーン8,
000cm2/g以上の微粉末高炉スラグを含有してなる注入材
料である。That is, the present invention provides a water glass, a solidifying agent, and a brane 8,
It is an injection material containing fine powder blast furnace slag of 000 cm 2 / g or more.
以下、本発明を詳しく説明する。 Hereinafter, the present invention will be described in detail.
本発明に係る水ガラスとは、ケイ酸アルカリ塩、例え
ばケイ酸ナトリウムなどを固形分37.9〜55.0重量％の濃
度の水溶液にしたものをいう。水ガラスは必要により水
を加えてもよい。通常１〜３号水ガラスが使用される。
JIS規格は、SiO2含有量23.0〜38.0％、Na2O含有量は6.0
〜19.0％である。The water glass according to the present invention refers to an aqueous solution of an alkali silicate such as sodium silicate having a solid content of 37.9 to 55.0% by weight. Water glass may be added with water if necessary. Usually, No. 1 to 3 water glass is used.
According to JIS standard, SiO 2 content is 23.0-38.0%, Na 2 O content is 6.0
~ 19.0%.
本発明でいう固化剤とは、クエン酸や酒石酸等の有機
酸、炭酸ナトリウム、重炭酸ナトリウム、硫酸マグネシ
ウム、塩化カルシウム、硫酸ナトリウム、硫酸銅、消石
灰、硫酸バンド、セメント、ベントナイト、アルミン酸
ナトリウム及びケイ弗化ナトリウム等の無機物や硫酸な
どの無機酸のうち、水溶性であり、水ガラスと反応して
それをゲル化させる能力のあるものをいう。通常、固化
剤は、水ガラスと反応させる前にあらかじめ一定量の水
に溶かして溶液状態で使用することが好ましい。The solidifying agent referred to in the present invention includes organic acids such as citric acid and tartaric acid, sodium carbonate, sodium bicarbonate, magnesium sulfate, calcium chloride, sodium sulfate, copper sulfate, slaked lime, sulfate band, cement, bentonite, sodium aluminate and Among inorganic substances such as sodium silicofluoride and inorganic acids such as sulfuric acid, those which are water-soluble and have a capability of reacting with water glass and gelling it. Usually, it is preferable that the solidifying agent is dissolved in a certain amount of water in advance before reacting with water glass, and used in a solution state.
固化剤の使用量は、水ガラスの固形分100重量部に対
し0.1〜30重量部が好ましく、更に好ましくは、10〜25
重量部である。0.1重量部未満ではゲル化時間が長く、3
0重量部を越えると、ゲル化時間が短かく、実用的でな
い。The amount of the solidifying agent used is preferably 0.1 to 30 parts by weight, more preferably 10 to 25 parts by weight, based on 100 parts by weight of the solid content of the water glass.
Parts by weight. If the amount is less than 0.1 part by weight, the gelation time is long,
If the amount is more than 0 parts by weight, the gelation time is too short to be practical.
本発明でいう微粉末高炉スラグ（以下微粉スラグとい
う）とは、製鉄所で銑鉄をつくる際に発生するスラグで
あり、鉄鉱石中の不要成分（例えば廃石や脈石などとい
わる粘土質でSiO2及びAl2O3を主成分とするもの）やコ
ークス中の灰分（主にSiO2やAl2O3）などが、フラツク
ス（石灰（CaO）やマグネシア（MgO）等）と反応して生
成するものである。The fine-powder blast furnace slag (hereinafter referred to as fine-powder slag) as referred to in the present invention is slag generated when pig iron is made in an ironworks, and is an unnecessary component in iron ore (for example, a clayey material such as waste stone and gangue). as a main component of SiO 2 and Al 2 O 3) and ash in the coke (mainly to SiO 2 and Al 2 O 3) is Furatsukusu (lime (CaO) to react with and magnesia (MgO), etc.) To generate.
また、微粉スラグの他に、銑鉄に炭素等の不純分があ
り、これを除却するため溶融銑鉄に純酸素を吹き込み不
純分を燃焼させ、靱性のある鋼をつくることもある。こ
の際発生するスラグも使用出来るが、活性が低く、ま
た、発生量が少ないこともあり実用的でない。In addition to pig slag, pig iron contains impurities such as carbon. To remove the impurities, pure oxygen is blown into molten pig iron and the impurities are burned to produce tough steel. Although slag generated at this time can be used, it is not practical because the activity is low and the generated amount is small.
微粉スラグは、塩基度が、高いものほど好ましく、塩
基度1.9以上、ガラス化率95％以上が好ましい。微粉ス
ラグの粉末度は、水ガラスと反応して溶解し、注入性を
向上させる面から、また、強度増進の面から、ブレーン
8,000cm2/g以上が好ましく、8,000〜12,000がより好ま
しい。The higher the basicity of the fine powder slag, the more preferable. The basicity is 1.9 or more, and the vitrification rate is preferably 95% or more. The fineness of the fine powder slag is determined by reacting with water glass and dissolving to improve pourability.
It is preferably at least 8,000 cm 2 / g, more preferably from 8,000 to 12,000.
微粉スラグの使用量は、多い程高強度となるが、逆に
注入時の作業性が悪くなるので水ガラスの固形分と微粉
スラグの合計100重量部に対して0.1〜90重量部の範囲が
好ましい。特に５〜50重量部の範囲がより好ましい。The use amount of the fine powder slag increases as the amount increases, but on the contrary, the workability at the time of pouring deteriorates. preferable. In particular, the range of 5 to 50 parts by weight is more preferable.
上記材料に、更に、注入性や圧縮強度向上の面から、
市販の一般減水剤や高性能減水剤を併用ことも好まし
い。特に、ナフタレンスルホン酸又はその塩のホルマリ
ン縮合物やメラミンスルホン酸又はその塩のホルマリン
縮合物等の高性能減水剤の併用が好ましい。In addition to the above materials, from the viewpoint of improving injectability and compressive strength,
It is also preferable to use a commercially available general water reducing agent or a high performance water reducing agent in combination. In particular, a combined use of a high-performance water reducing agent such as a formalin condensate of naphthalenesulfonic acid or a salt thereof or a formalin condensate of melaminesulfonic acid or a salt thereof is preferable.
本発明において、各材料の混合方法や注入方法は特に
限定されるものではなく、例えば、微粉スラグと固化剤
との混合物を水と混合し、この懸濁液をポンプで圧送
し、この圧送経路中に水ガラスを混入し、そのまま地中
に注入する。いわゆる1.5シヨツト工法や、圧送経路の
先端で両液を混合する２シヨツト工法を採用することが
できる。In the present invention, the mixing method and the injection method of each material are not particularly limited. For example, a mixture of fine powder slag and a solidifying agent is mixed with water, the suspension is pumped by a pump, and the pumping path is used. Water glass is mixed in and poured directly into the ground. A so-called 1.5-shot method or a two-shot method in which both liquids are mixed at the tip of the pressure feed path can be used.
本発明の注入材料は一般的に止水及び補強用に用いら
れるが、極めて微粒子であるので、地盤への注入材料と
して用いても、土粒子間の空隙へ注入可能である。The injection material of the present invention is generally used for water stoppage and reinforcement, but since it is extremely fine, it can be injected into voids between soil particles even when used as an injection material for ground.
以下、実施例及び比較例により本発明を詳しく説明す
る。Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples.
実施例１ ブレーン8,000cm2/gの微粉スラグ85重量部に、固化剤
としてクエン酸15重量部を加えた混合物を、第１表に示
すように分取し、各々水を加え全量を500ccとした。別
に、３号水ガラス250ccに水250ccを混合し、500ccの水
溶液とした。Example 1 A mixture obtained by adding 15 parts by weight of citric acid as a solidifying agent to 85 parts by weight of fine powder slag of 8,000 cm 2 / g of brane was fractionated as shown in Table 1, and water was added thereto to make the total amount 500 cc. did. Separately, 250 cc of water was mixed with 250 cc of No. 3 water glass to obtain a 500 cc aqueous solution.
20℃において、これら両液を混合し、その直後よりゲ
ル化までの時間を測定し、ゲル化時間とした。At 20 ° C., the two solutions were mixed, and immediately after that, the time until gelation was measured, which was defined as the gelation time.
このゲル100重量部に対し７号珪砂100重量部を加え、
すばやく混合し、４×４×16cmの型枠に入れ、角柱の供
試体を作製し、４時間20℃で気乾養生した後、20℃の水
中養生を行ない、所定材令経過後に圧縮強度を測定し
た。結果を第１表に併記する。Add 100 parts by weight of No. 7 silica sand to 100 parts by weight of this gel,
Mix quickly, put in a 4x4x16cm formwork, make prismatic specimens, air dry cure at 20 ° C for 4 hours, then cure in water at 20 ° C, and after a certain age, compressive strength It was measured. The results are shown in Table 1.
この供試体を６ケ月間流水中にて養生しても外観形状
及び強度に異常は認められなかつた。また、従来からあ
る水ガラス系注入材料に比べ、本発明の注入材料は、ゲ
ル化時間が早くなり、かつ高い圧縮強度を示した。No abnormalities were observed in the external shape and strength even after curing the test specimen in running water for 6 months. In addition, the injection material of the present invention exhibited a faster gelation time and showed higher compressive strength than a conventional water glass injection material.
また、実験No.1−５は、市販のフライアッシュを粉砕
してブレーン8,000cm2/gとしたもの85重量部とクエン酸
15重量部からなる混合物150gを使用した。In Experiment No. 1-5, 85 parts by weight of commercially available fly ash ground to 8,000 cm 2 / g of brane were mixed with citric acid.
150 g of a mixture consisting of 15 parts by weight were used.
〈使用材料〉 水ガラス:3号水ガラス（日本化学工業（株）製） クエン酸：工業用（昭和化工（株）製） 微粉スラグ：新日鉄社室蘭（電化社粉砕100μ以下） 珪 砂:7号珪砂 実施例２ 実施例１の混合物150gを用いて、養生温度２、５、1
0、20及び30℃と変化させたこと以外は実施例１と同様
に行つた。その結果を第２表に併記する。 <Materials> Water glass: No. 3 water glass (manufactured by Nippon Kagaku Kogyo Co., Ltd.) Citric acid: industrial use (manufactured by Showa Kako Co., Ltd.) Fine slag: Nippon Steel Corporation Muroran (100 μ or less crushed by Denkasha) Silica Sand: 7 No. 2 Silica sand Example 2 Using 150 g of the mixture of Example 1, curing temperature 2, 5, 1
The procedure was performed in the same manner as in Example 1 except that the temperature was changed to 0, 20 and 30 ° C. The results are shown in Table 2.
ゲル化時間及び圧縮強度共に温度にあまり影響され
ず、高い圧縮強度と安定したゲル化時間が得られた。Both the gel time and the compressive strength were not significantly affected by the temperature, and a high compressive strength and a stable gel time were obtained.
実施例３ 微粉スラグの粉末度を変化させた混合物100gを用いた
こと以外は、実施例１と同様に行ない、ゲル化時間及び
圧縮強度を測定した。結果を第３表に併記する。粉末度
が高くなるにしたがいゲル化時間の短縮が可能となり、
また、短期材令での圧縮強度の増進が可能となつた。 Example 3 The gelation time and compressive strength were measured in the same manner as in Example 1 except that 100 g of a mixture in which the fineness of the fine powder slag was changed was used. The results are shown in Table 3. As the fineness increases, the gelation time can be reduced,
In addition, it became possible to increase the compressive strength by short-term aging.
実施例４ 微粉スラグ125g一定にして、固化剤としてクエン酸を
第４表に示すように、水ガラスに対し０〜15％と変化さ
せて加えた混合物に水を加えて500ccとした。別に水ガ
ラス250ccに水250ccを混合して500ccの水溶液としたこ
と以外は実施例１と同様に行つた。 Example 4 Water was added to a mixture obtained by changing citric acid as a solidifying agent to 0 to 15% with respect to water glass as shown in Table 4 to make 500 cc by keeping 125 g of fine powder slag constant. Separately, the same procedure as in Example 1 was carried out except that 250 cc of water was mixed with 250 cc of water glass to obtain a 500 cc aqueous solution.
結果を第４表に併記する。 The results are shown in Table 4.
実施例５ スラグを第５表に示すように０〜125gと変化させ、ク
エン酸を25g加えた混合物を用いたこと以外は、実施例
１と同様に行つた。 Example 5 The procedure was performed in the same manner as in Example 1 except that the mixture of slag was changed from 0 to 125 g as shown in Table 5 and 25 g of citric acid was used.
結果を第５表に併記する。 The results are shown in Table 5.
実施例６ 固化剤として酒石酸を用いたこと以外は実施例１と同
様に行ない、ゲル化時間及び圧縮強度を測定した。結果
を表６に示す。 Example 6 Except having used tartaric acid as a solidifying agent, it carried out similarly to Example 1, and measured gel time and compressive strength. Table 6 shows the results.
比較例１ 微粉スラグを使用せずにクエン酸のみを使用して実験
を行つた結果を第７表に示す。また実験No.7−５につ
き、養生温度を２、５、10、20及び30℃と変化させ同様
の実験を行つた。その結果を第８表に示す。 Comparative Example 1 Table 7 shows the results of an experiment conducted using only citric acid without using fine powder slag. For Experiment No. 7-5, the same experiment was performed with the curing temperature changed to 2, 5, 10, 20, and 30 ° C. Table 8 shows the results.
第７表では、実施例１と比較して、ゲル化時間が長
く、各材令の圧縮強度も低い。これらの供試体を６ケ月
間、流水中で養生したところ、ゲルが溶解して原形をと
どめなかつた。また、第８表に示すように、温度が低い
程ゲル化時間が長くなり、且つ強度発現も極端に悪かつ
た。In Table 7, the gelation time is longer and the compressive strength of each material is lower than that of Example 1. When these specimens were cured in running water for 6 months, the gel was dissolved and the original form was not maintained. Further, as shown in Table 8, the lower the temperature was, the longer the gelation time was, and the strength was extremely poor.
〔発明の効果〕 本発明によれば、下記の効果が得られる。 According to the present invention, the following effects can be obtained.
（１）微粉スラグと固化剤の併用により、従来品よりゲ
ル化時間が早くなり、圧縮強度が高くなる。また高価な
固化剤の使用量を従来より少なくできるので経済的であ
る。(1) By using the fine powder slag and the solidifying agent together, the gelation time is earlier and the compressive strength is higher than that of the conventional product. Further, the amount of the expensive solidifying agent used can be reduced, which is economical.
（２）水中においても、ゲルが溶解することもなく、耐
久性のある硬化体が得られる。(2) Even in water, the gel does not dissolve and a durable cured product is obtained.
（３）微粉スラグを使用するため注入性に優れ、高強度
の注入材料とすることができる。その結果として、地盤
強度の弱い場所の改良にも適用可能である。(3) Since fine powder slag is used, it is excellent in pourability and can be made into a high-strength pourable material. As a result, it can be applied to the improvement of a place where the ground strength is weak.
（４）ゲル化時間は、２〜30℃の適用範囲では、あまり
変化しないので、注入管理がやりやすい。(4) The gelation time does not change much in the application range of 2 to 30 ° C., so that injection control is easy.
Claims (1)
/g以上の微粉末高炉スラグを含有してなる注入材料。1. A water glass, a solidifying agent, and a brane of 8,000 cm 2
Injection material containing fine powder blast furnace slag of not less than / g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63321962A JP2791071B2 (en) | 1988-12-22 | 1988-12-22 | Injection material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63321962A JP2791071B2 (en) | 1988-12-22 | 1988-12-22 | Injection material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02167848A JPH02167848A (en) | 1990-06-28 |
| JP2791071B2 true JP2791071B2 (en) | 1998-08-27 |
Family
ID=18138372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63321962A Expired - Fee Related JP2791071B2 (en) | 1988-12-22 | 1988-12-22 | Injection material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2791071B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196932B (en) * | 2022-07-20 | 2023-03-31 | 山东大学 | Low-carbon inorganic gelling grouting filling material, and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2523112B2 (en) * | 1986-11-13 | 1996-08-07 | 電気化学工業株式会社 | Injection material |
-
1988
- 1988-12-22 JP JP63321962A patent/JP2791071B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02167848A (en) | 1990-06-28 |
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