JP2820972B2 - Rapid hardening material for injection and cement composition for injection using the same - Google Patents
Rapid hardening material for injection and cement composition for injection using the sameInfo
- Publication number
- JP2820972B2 JP2820972B2 JP1224371A JP22437189A JP2820972B2 JP 2820972 B2 JP2820972 B2 JP 2820972B2 JP 1224371 A JP1224371 A JP 1224371A JP 22437189 A JP22437189 A JP 22437189A JP 2820972 B2 JP2820972 B2 JP 2820972B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- cement
- rapid hardening
- water
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は注入用急硬材及びそれを用いた注入用セメン
ト組成物に関する。Description: TECHNICAL FIELD The present invention relates to a rapid hardening material for injection and a cement composition for injection using the same.
従来、セメントを早期に硬化させる注入工法として、
カルシウムアルミネート等を主成分としたセメント急硬
材を用いる方法が提案されている（特公昭57−10058号
公報）。Conventionally, as an injection method to harden cement early,
A method using a cement hardened material containing calcium aluminate as a main component has been proposed (Japanese Patent Publication No. 57-10058).
しかしながら、通常使用されるセメント急硬材の粒度
は、ブレーン値で4,500〜5,000cm2/gであり、注入施工
を実施する場合、注入する地盤の状態が細砂、シルト又
は粘土では、注入不可能な場合があるなどの課題があっ
た。However, the particle size of the cement rapid hardwood normally used are 4,500~5,000cm 2 / g in Blaine value, when carrying out the injection construction, injection states of the ground is fine sand, in the silt or clay, injected non There were issues such as possible cases.
また、ペースト又はモルタルを注入する場合、ポンプ
圧送性能や注入性能向上のため、流動性を高める必要が
あり、必然的に水量が上がり、材料分離が激しく、硬化
後の耐久性が期待できないなどの課題があった。In addition, when injecting paste or mortar, it is necessary to increase the fluidity in order to improve pumping performance and injecting performance, inevitably the amount of water rises, material separation is severe, and durability after curing cannot be expected. There were challenges.
さらに、ポルトランドセメント又は混合セメントを用
いたペースト又はモルタルと、予め水と混練りしたセメ
ント急硬材を混合注入した場合も材料の分離が激しいと
いう課題があった。Furthermore, when a paste or mortar using Portland cement or mixed cement and a cement quick-hardened material previously kneaded with water are mixed and injected, there is a problem that the material is severely separated.
本発明者らは、上記従来の課題を解決すべく種々検討
した結果、特定の材料を使用することによって注入性状
を良好にし、材料分離を低減できる知見を得て本発明を
完成するに至った。The present inventors have conducted various studies in order to solve the above-mentioned conventional problems, and as a result, have found that the use of a specific material can improve the injection property and reduce the material separation, thereby completing the present invention. .
即ち、本発明はカルシウムアルミネート類と無機硫酸
塩を含有してなり、最大粒径が20μｍ以下である注入用
急硬材であり、さらに、これと最大粒径が40μｍ以下の
セメントを含有してなる注入用セメント組成物である。That is, the present invention is a rapid hardening material for injection having a maximum particle size of 20 μm or less, comprising calcium aluminates and an inorganic sulfate, and further contains a cement having a maximum particle size of 40 μm or less. And a cement composition for injection.
以下本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明で使用するカルシウムアルミネート類とは、結
晶質もしくは非晶質のカルシウムアルミネート、又は、
これに、フッ化カルシウムなどを固溶したカルシウムハ
ロアルミネートであり、そのうち、化学式で3CaO・3Al2
O3・CaF2と示される鉱物を主成分とするものが特に好ま
しい。Calcium aluminates used in the present invention, crystalline or amorphous calcium aluminate, or,
This is a calcium haloaluminate in which calcium fluoride or the like is dissolved, of which 3CaO.3Al 2
Those containing a mineral represented by O 3 .CaF 2 as a main component are particularly preferable.
また無機硫酸塩は無水、半水及び二水のセッコウや硫
酸ナトリウムなどの硫酸塩を示し、なかでも無水セッコ
ウの使用は好ましい。The inorganic sulfates are anhydrous, hemi-hydrated and di-hydrated gypsum and sulfates such as sodium sulfate. Above all, use of anhydrous gypsum is preferred.
無機硫酸塩の使用量は、カルシウムアルミネート類１
重量部に対して、0.1〜５重量部が好ましく、0.5〜1.5
重量部がより好ましい。0.1重量部未満では急硬性が強
すぎ、強度も低下する傾向がある。一方、５重量部を越
えると長期にわたって膨張し、強度低下の原因ともなる
おそれがある。The amount of inorganic sulfate used is calcium aluminate 1
0.1 to 5 parts by weight, preferably 0.5 to 1.5 parts by weight,
Parts by weight are more preferred. If it is less than 0.1 part by weight, the rapid hardening property is too strong, and the strength tends to decrease. On the other hand, if it exceeds 5 parts by weight, it may expand over a long period of time, which may cause a decrease in strength.
本発明の注入用急硬材に凝結遅延剤及び／又は急硬促
進剤を添加し、施工の際の凝結時間を任意に設定するこ
とが可能である。It is possible to add a setting retarder and / or a rapid hardening accelerator to the rapid hardening material for injection of the present invention, and set the setting time at the time of construction arbitrarily.
凝結遅延剤としては、グルコン酸やクエン酸ナトリウ
ムなどの有機酸又はその塩、さらに、これらの有機酸
と、炭酸ナトリウム、炭酸マグネシウム、炭酸カリウム
及び炭酸カルシウム等の炭酸塩や、水酸化カリウムや水
酸化カルシウムなどの水酸化物との混合物などが使用で
きる。Examples of the setting retardant include organic acids such as gluconic acid and sodium citrate or salts thereof, and furthermore, these organic acids and carbonates such as sodium carbonate, magnesium carbonate, potassium carbonate and calcium carbonate, potassium hydroxide and water. A mixture with a hydroxide such as calcium oxide can be used.
急硬促進剤としては、塩化カルシウムなどのアルカリ
土類金属塩や塩化ナトリウムなどのアルカリ金属塩が使
用できる。As the rapid hardening accelerator, alkaline earth metal salts such as calcium chloride and alkali metal salts such as sodium chloride can be used.
凝結遅延剤及び／又は急硬促進剤の使用量は、注入用
急硬材を予め水と混和した注入用急硬材スラリーを用い
るときは、それ自体が少なくとも30分、好ましくは数時
間凝結しないが、全材料を混合すると数10分以内に凝結
硬化が開始するように定めればよく、一般的には、注入
用急硬材100重量部に対して、１〜３重量部程度が好ま
しい。The setting amount of the setting retarder and / or the hardening accelerator is such that when the hardening material for injection is mixed with water in advance, the hardening material for injection is not set by itself for at least 30 minutes, preferably for several hours. However, it is sufficient that the setting and hardening be started within several tens of minutes when all the materials are mixed.
注入用急硬材の使用量は、所望の凝結時間に応じて選
択できるが、セメント100重量部に対して、５〜50重量
部が好ましく、20〜30重量部がより好ましい。注入用急
硬材の使用量が５重量部未満では急硬使用が弱く、50重
量部を越えても使用しても、使用効果が期待できず経済
的でない。The amount of the hardened material for injection can be selected according to the desired setting time, but is preferably 5 to 50 parts by weight, more preferably 20 to 30 parts by weight, based on 100 parts by weight of cement. If the amount of the rapid hardening material used for injection is less than 5 parts by weight, the rapid hardening is weak.
注入用急硬材の粒度は粒子の最大粒径が20μｍ以下で
あり、好ましくは10μｍ以下である。20μｍを越える
と、微細な部分への注入が困難になったり、材料分離が
発生する等の悪影響を与える。Regarding the particle size of the rapid hardening material for injection, the maximum particle size of the particles is 20 μm or less, preferably 10 μm or less. If it exceeds 20 μm, it has an adverse effect such as difficulty in injection into a fine portion and occurrence of material separation.
本発明で使用するセメントとは、普通・早強・超早強
などの各種ポルトランドセメント、又は、高炉セメン
ト、フライアッシュセメントなどの各種混合セメント
の、粒度を最大粒径40μｍ以下にしたものであり、40μ
ｍを越えると、微細な部分への注入が困難となったり、
材料分離が発生する等の悪影響があり好ましくない。The cement used in the present invention refers to various portland cements such as ordinary, fast and very fast, or blast furnace cement and various mixed cements such as fly ash cement, which have a maximum particle size of 40 μm or less. , 40μ
If it exceeds m, it becomes difficult to inject into fine parts,
There is an adverse effect such as occurrence of material separation, which is not preferable.
各材料の混練り方法は、特に限定されるものではな
く、注入用急硬材とセメントを予め粉体で混合し、その
後水を入れ混練りする方法や、注入用急硬材とセメント
を別々に水と混練りしておく方法などが可能である。The method of kneading each material is not particularly limited, and the method is to previously mix the hardened material for injection and cement with powder, and then add water and knead, or separate the hardened material for injection and cement separately. A method of kneading with water in advance is possible.
また、注入方法も、限定されるものではないが、注
入用急硬材とセメントを予め混合・混練りしたスラリー
状の物を、１つの注入管を通して注入する１ショット工
法、注入用急硬材とセメントを別々に水と混練りした
スラリー状の物を、別々の注入管を通し、注入前にＹ字
管で混合合流後、１本の管で注入する1.5ショット工法
及び注入用急硬材とセメントを別々に水と混練りした
スラリー状の物を、別々の注入管を通し、特に、混合管
を通さず注入する２ショット工法等、一般的に用いられ
る工法が好ましく、混合能率などの点から1.5ショット
工法がより好ましい。Also, the injection method is not limited, but a one-shot method in which a slurry-like material obtained by previously mixing and kneading the hard material for injection and cement is injected through one injection pipe, the hard material for injection is used. Slurry obtained by kneading water and cement separately with water is passed through separate injection pipes, mixed and combined with a Y-shaped pipe before injection, and then injected with one pipe. A slurry-like material obtained by kneading water and cement separately with water is passed through separate injection pipes, and in particular, a commonly used method such as a two-shot method of injecting without passing through a mixing pipe is preferable. From the viewpoint, the 1.5 shot method is more preferable.
次に実施を示して本発明を詳細に説明する。 Next, the present invention will be described in detail with reference to embodiments.
実施例１ 第１表に示す配合の注入用急硬材と、40μｍ以下に粉
砕したセメント400gを水1,200gで混練りしたセメントペ
ーストとを混合し、ポリエチレン製のφ5cmの袋に高さ1
5cmまで入れ、24時間後、分離した浮き水の高さを測定
した。その結果と、（浮水の高さ/15）×100を比率
（％）として第１表に併記する。Example 1 A mixture of a hardened material for injection having the composition shown in Table 1 and a cement paste obtained by kneading 400 g of cement crushed to 40 μm or less with 1,200 g of water were mixed, and placed in a polyethylene φ5 cm bag having a height of 1 mm.
It was inserted to 5 cm, and after 24 hours, the height of the separated floating water was measured. Table 1 also shows the results and (height of floating water / 15) × 100 as a ratio (%).
＜使用材料＞ CA類 ：カルシウムフロロアルミネート、 セッコウ：無水セッコウ、試薬１級、和光純薬（株） 製 セメント：アンデスセメント（株）製、普通ポルトラ ンドセメント、粉砕品（最大粒径40μｍ以下） 水 ：飲料水 比較例１ 粉砕してしないセメント（粒度40μｍより大）と実験
No.1−８に示す注入用急硬材を使用したこと以外は、実
施例１と同様に行った。その結果浮き水の高さは7.0c
m、比率は46.7％であった。<Materials> CAs: Calcium Fluoroaluminate, Gypsum: Anhydrite, Reagent 1st grade, manufactured by Wako Pure Chemical Co., Ltd. Cement: Made by Andes Cement Co., Ltd., ordinary portland cement, pulverized product (maximum particle size 40 μm or less) ) Water: Drinking water Comparative example 1 Experiment with uncrushed cement (grain size larger than 40 μm)
The same procedure was performed as in Example 1 except that the hardened material for injection shown in No. 1-8 was used. As a result, the height of the floating water is 7.0c
m, the ratio was 46.7%.
実施例２ φ10×20cmの円筒を立て、底に布を敷いて、比重2.6
3、粒度0.3〜1.2mm及び間隙率43.0％の砂を、下部より
高さ15cm充填し、実施例１実験No.1−１、１−５及び１
−８の注入用急硬材と、40μｍ以下に粉砕したセメント
400gを水1,200gで混練りしたセメントペーストとを混合
し、容積500ccの円筒の上部よりそそぎ、24時間後脱型
し、注入浸透性を測定した。結果を第２表に示す。 Example 2 A cylinder of φ10 × 20 cm was set up, a cloth was laid on the bottom, and the specific gravity was 2.6.
3. A sand having a particle size of 0.3 to 1.2 mm and a porosity of 43.0% was filled with a height of 15 cm from the lower part, and Example 1 Experiments No. 1-1, 1-5 and 1
-8 rapid hardening material for injection and cement ground to 40μm or less
A cement paste obtained by kneading 400 g with water (1,200 g) was mixed, poured from the top of a cylinder having a capacity of 500 cc, demolded after 24 hours, and measured for injection permeability. The results are shown in Table 2.
なお、砂の間隙率とは、単位容積当りの空隙率であ
る。In addition, the porosity of sand is a porosity per unit volume.
なお、第２表において、固結容積とは、注入されたセ
メントペーストが浸透して固結した容積を示し、砂表面
残留厚とは、セメントペーストを上部より砂に注いだ
際、浸透せずに砂の表面に残ったセメントペーストの厚
みを示す。 In Table 2, the consolidation volume refers to the volume of the cement paste that has been infiltrated and consolidated, and the residual sand surface thickness means that when the cement paste is poured into sand from above, it does not permeate. Shows the thickness of the cement paste remaining on the surface of the sand.
実施例３ CA類125kg、セッコウ125kg、炭酸塩0.75kg、有機酸0.
25kg及び水1,250kgからなる注入用急硬材と、40μｍ以
下に粉砕したセメント100kgを、水500kgで混練りしたセ
メントペーストとを重量比で1:3に混合し、第３表に示
す条件で、1.5ショット工法で岩盤注入を行った。Example 3 125 kg of CAs, 125 kg of gypsum, 0.75 kg of carbonate, 0.
A hardened material for injection consisting of 25 kg and 1,250 kg of water, and a cement paste kneaded with 500 kg of water and 100 kg of cement pulverized to 40 μm or less mixed at a weight ratio of 1: 3 under the conditions shown in Table 3 Rock injection was performed by 1.5 shot method.
この結果、微細なクラックにまで注入され、水もれは
完全になくなり、岩盤は強固に一体化された。 As a result, even fine cracks were injected, water leakage completely disappeared, and the rock mass was firmly integrated.
＜使用材料＞ 炭酸カリウム：試薬一級、和光純薬（株）性 クエン酸Na ：クエン酸ナトリウム、試薬一級、和光純 薬（株）性 なお、CA類とセッコウは各々10μｍ以下品を使用し
た。<Materials used> Potassium carbonate: First class reagent, Wako Pure Chemical Industries, Ltd. Na citrate: Sodium citrate, First class reagent, Wako Pure Chemical Co., Ltd. CAs and gypsum were each 10 μm or less.
以上のように本発明による効果は次の通りである。 As described above, the effects of the present invention are as follows.
１）注入性状が大幅に改善されるので、微細な部分まで
注入可能となる。1) Since the injection properties are greatly improved, it is possible to inject even fine portions.
２）ペースト又はモルタル中において材料分離が少ない
ので均一な注入が可能となり硬化後の耐久性が向上され
る。2) Since there is little material separation in the paste or mortar, uniform injection is possible and durability after curing is improved.
３）配合比を変化させることにより、強度、弾性及び凝
結時間が任意に調節できるので、効率的かつ経済的であ
る。3) By changing the compounding ratio, the strength, elasticity and setting time can be arbitrarily adjusted, so that it is efficient and economical.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 28/02 C09K 17/00Continuation of front page (58) Field surveyed (Int. Cl. 6 , DB name) C04B 28/02 C09K 17/00
Claims (2)
含有してなり、最大粒径が20μｍ以下である注入用急硬
材。An injectable hardened material containing calcium aluminates and an inorganic sulfate and having a maximum particle size of 20 μm or less.
40μｍ以下のセメントを含有してなる注入用セメント組
成物。2. The rapid hardening material for injection according to claim 1 and a maximum particle size.
An injectable cement composition containing a cement of 40 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224371A JP2820972B2 (en) | 1989-09-01 | 1989-09-01 | Rapid hardening material for injection and cement composition for injection using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224371A JP2820972B2 (en) | 1989-09-01 | 1989-09-01 | Rapid hardening material for injection and cement composition for injection using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0388755A JPH0388755A (en) | 1991-04-15 |
| JP2820972B2 true JP2820972B2 (en) | 1998-11-05 |
Family
ID=16812708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1224371A Expired - Fee Related JP2820972B2 (en) | 1989-09-01 | 1989-09-01 | Rapid hardening material for injection and cement composition for injection using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2820972B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2742432B1 (en) * | 1995-12-15 | 1998-02-06 | Spie Fondations | RIGIDIFICATION ACCELERATOR, GROUT FOR SEALING AND / OR CONSOLIDATION OF SOILS AND CONSTRUCTION MATERIALS RELATING TO SUCH AN ACCELERATOR, METHODS USING SUCH GROUT |
| JP6177658B2 (en) * | 2013-10-18 | 2017-08-09 | 太平洋マテリアル株式会社 | Quick setting admixture |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5919205B2 (en) * | 1980-09-04 | 1984-05-04 | 株式会社アスク研究所 | Ground excavation method |
| JPS5951503A (en) * | 1983-08-01 | 1984-03-26 | 松下電器産業株式会社 | Thermistor |
| JPS6245913A (en) * | 1985-08-23 | 1987-02-27 | Yanmar Diesel Engine Co Ltd | Timing changing device in timing belt drive system of engine |
-
1989
- 1989-09-01 JP JP1224371A patent/JP2820972B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0388755A (en) | 1991-04-15 |
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