JPH0633057A - Grout for improving soil - Google Patents
Grout for improving soilInfo
- Publication number
- JPH0633057A JPH0633057A JP22770792A JP22770792A JPH0633057A JP H0633057 A JPH0633057 A JP H0633057A JP 22770792 A JP22770792 A JP 22770792A JP 22770792 A JP22770792 A JP 22770792A JP H0633057 A JPH0633057 A JP H0633057A
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- furnace slag
- gypsum
- portland cement
- cement clinker
- 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
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ダム基礎及びトンネル
掘削の山岳土木、あるいは地下鉄、下水道の地下構造物
や高層ビル基礎の都市土木等に使用する地盤改良用注入
材に関する。更に詳しくは、岩盤の亀裂や砂地盤に注入
して地盤の強化や漏水防止を図る際の微細間隙への浸透
性に優れた高性能の地盤改良用注入材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement injection material used for dam foundation and mountain excavation for tunnel excavation, or underground construction for subways, sewers, and urban civil engineering for high-rise building foundation. More specifically, the present invention relates to a high-performance ground improvement injection material that is excellent in permeability into fine gaps when it is injected into a rock crack or sand ground to strengthen the ground and prevent water leakage.
【０００２】[0002]
【従来の技術】地盤改良用注入材（以下、注入材と記述
する場合がある。）のうちセメント系は、セメントミル
ク系と水ガラスを併用したセメント−水ガラス系（ＬＷ
系）の２種に大別される。両者は特にゲル化時間が大き
く異なり使用目的によって使い分けられている。岩盤や
砂地盤へ使用する場合は、岩盤や砂地盤への浸透のし易
さの観点から、通常使用されるセメントは非常に細かく
粉砕され、ブレーン比表面積を大きく、最大粒径を小さ
くまたは超微粉領域の粒群量を少なくする方法が一般に
採用されている。2. Description of the Related Art Among the ground improvement injection materials (hereinafter sometimes referred to as "injection materials"), the cement type is a cement-water glass type (LW) which is a combination of cement milk type and water glass.
It is roughly divided into two types. The gelation times of the two differ greatly, and they are used properly according to the purpose of use. When used for rock or sand ground, the cement that is usually used is very finely pulverized to have a large Blaine specific surface area and a maximum particle size of A method of reducing the amount of particles in the fine powder area is generally adopted.
【０００３】このようにセメント系注入材はその粒度分
布が重要であるが、ポルトランドセメントクリンカーと
高炉スラグを主要構成成分とする注入材は、ポルトラン
ドセメントクリンカーと高炉スラグの粉砕性が大きく相
違するので、別々に粉砕した後両者を混合する分離粉砕
方式により一般に製造されている。一方、セメントを含
む各種の粉体は、粉体の粒径が２〜３μｍ以下となると
粒子表面における種々の作用によって凝集力が著しく増
大し、例えば界面活性剤を添加して凝集力を減少させよ
うとしても、凝集粒子の十分な解こう・分散は困難であ
る。As described above, the particle size distribution of the cement-based injecting material is important, but the injecting material containing the Portland cement clinker and the blast furnace slag as main constituents has a great difference in the pulverizability of the Portland cement clinker and the blast furnace slag. Generally, it is manufactured by a separate crushing method in which the two are crushed separately and then mixed. On the other hand, in the case of various powders including cement, the cohesive force is remarkably increased by various actions on the particle surface when the particle size of the powder becomes 2 to 3 μm or less. For example, a surfactant is added to decrease the cohesive force. Even if it tries, it is difficult to sufficiently deflocate and disperse the aggregated particles.
【０００４】ポルトランドセメントクリンカーまたは高
炉スラグのそれぞれを１０〜１５μｍ以下に微粉砕し、
次に混合して上記のようなセメント系注入材を製造した
場合、かなりの量含まれる２〜３μｍ以下の超微粉粒群
は水中での凝集力は極めて大きくなる。このため、ポル
トランドセメントクリンカーまたは高炉スラグの一次粒
子が非常に細かくなったにしても、注入の際にセメント
粒子と高炉スラグ粒子は凝集して見掛けの粒径は数倍あ
るいは数十倍となり、微細な間隙への浸透性は著しく低
下する。従って、この対策として分離粉砕されたポルト
ランドセメントクリンカーあるいは高炉スラグから２〜
３μｍ以下の超微粉粒群を分級・除去する方法が行われ
ているが、工程が煩雑であり製造原価は高価なものとな
っている。Each of Portland cement clinker or blast furnace slag is finely ground to 10 to 15 μm or less,
Next, when the cement-based injecting material as described above is manufactured by mixing, the cohesive force in water of the ultrafine particle group of 2-3 μm or less contained in a considerable amount becomes extremely large in water. Therefore, even if the primary particles of Portland cement clinker or blast furnace slag become very fine, the cement particles and blast furnace slag particles aggregate during injection and the apparent particle size becomes several times or several tens of times smaller, Penetration into large gaps is significantly reduced. Therefore, as a measure against this, from the Portland cement clinker or blast furnace slag that has been separated and crushed,
Although a method of classifying and removing ultrafine particle groups of 3 μm or less is performed, the process is complicated and the manufacturing cost is expensive.
【０００５】[0005]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、セメントミルク系とＬＷ系のセメント注入
材において、水あるいは水ガラス溶液である分散媒体で
ポルトランドセメントクリンカーまたは高炉スラグの特
に２〜３μｍ以下の超微粉粒群を十分に解こう・分散さ
せ、注入材本来の機能を発揮させることにある。The problem to be solved by the present invention is, in cement milk type and LW type cement injecting materials, the dispersion medium which is water or water glass solution, and especially Portland cement clinker or blast furnace slag. The purpose is to sufficiently dissolve and disperse ultra-fine powder particles having a particle size of 3 μm or less so that the original function of the injection material is exhibited.
【０００６】セメント系注入材が分散媒体中で十分解こ
う・分散されると、岩盤や砂地盤の微細な亀裂や間隙へ
の浸透性が良好になる。また、固形分／分散媒体比が同
一の場合には、注入材の自然沈降速度が小さくなり材料
分離が起こり難くなる。更には、微細間隙への浸透性が
優れると、岩盤や砂地盤に浸透し硬化した注入材は岩盤
や砂地盤を強化し、止水性を改善する。[0006] When the cement-based injecting material is sufficiently thawed and dispersed in the dispersion medium, the permeability to fine cracks and gaps in rock or sand is improved. Further, when the solid content / dispersion medium ratio is the same, the spontaneous sedimentation rate of the injecting material becomes small, and the material separation hardly occurs. Furthermore, when the permeability to the fine pores is excellent, the injection material that has penetrated into the rock or sand ground and hardened strengthens the rock or sand ground and improves the water stopping performance.
【０００７】即ち、本発明の目的は、注入材の使用段階
におけるセメントミルク系あるいは水ガラスを併用した
ＬＷ系注入溶液中のセメント粒子の分散性を高め、注入
材料としての機能を十分に活かし、岩盤や砂地盤に対し
て優れた改良効果を与える注入材を提供することにあ
る。That is, the object of the present invention is to enhance the dispersibility of cement particles in an LW-based injection solution in which cement milk type or water glass is used at the stage of using the injection material, and to fully utilize its function as an injection material. An object of the present invention is to provide an injectable material that gives an excellent improvement effect to rock and sand ground.
【０００８】[0008]
【課題を解決するための手段】本発明者は鋭意研究し、
ブレーン比表面積が６０００〜１２５００ｃｍ２／ｇで
あり、且つ高炉スラグ含有量が特定の割合である混合粉
砕により製造される組成物が上記の目的を達成すること
を見出し本発明に到達した。[Means for Solving the Problems]
The inventors have found that a composition produced by mixing and pulverizing, which has a Blaine specific surface area of 6000 to 12500 cm 2 / g and a blast furnace slag content of a specific ratio, achieves the above-mentioned object, and thus reached the present invention.
【０００９】即ち本発明の要旨は、（１）ポルトランド
セメントクリンカーと高炉スラグを混合粉砕して得られ
るブレーン比表面積が６０００〜１２５００ｃｍ２／ｇ
の混合物とせっこうとからなる組成物あるいはポルトラ
ンドセメントクリンカー、高炉スラグおよびせっこうを
混合粉砕して得られるブレーン比表面積が６０００〜１
２５００ｃｍ２／ｇの組成物であって、該組成物中の高
炉スラグ含有量が６０〜８５重量％であり、且つせっこ
う含有量がＳＯ３基準で０．５〜３．０重量％である地
盤改良用注入材、である。That is, the gist of the present invention is: (1) The Blaine specific surface area obtained by mixing and pulverizing Portland cement clinker and blast furnace slag is 6000 to 12500 cm 2 / g.
Or a composition comprising a mixture of gypsum and portland cement clinker, blast furnace slag and gypsum having a Blaine specific surface area of 6000 to 1
2500 cm 2 / g composition, wherein the blast furnace slag content in the composition is 60 to 85 wt% and the gypsum content is 0.5 to 3.0 wt% based on SO 3. An injection material for ground improvement.
【００１０】更に、本発明の好ましい態様は、（２）混
合物が竪型ローラミルで混合粉砕したものである上記
（１）に記載の地盤改良用注入材、（３）せっこうが無
水せっこうである上記（１）に記載の地盤改良用注入
材、（４）ポルトランドセメントクリンカーが早強クリ
ンカーまたは耐硫酸塩クリンカーである上記（１）に記
載の地盤改良用注入材、である。Further, in a preferred embodiment of the present invention, (2) the ground improvement injection material according to (1) above, wherein the mixture is mixed and pulverized by a vertical roller mill, and (3) gypsum is anhydrous gypsum. The ground improvement injection material according to (1) above, and (4) the ground improvement injection material according to (1) above, wherein the Portland cement clinker is a high-strength clinker or a sulfate-resistant clinker.
【００１１】分離粉砕した後混合して得られるポルトラ
ンドセメントクリンカー、高炉スラグおよびせっこうか
らなるセメントミルク系あるいはＬＷ系の注入材は、ブ
レーン比表面積が例えば１００００ｃｍ２／ｇ程度にな
ると、それぞれの成分が構成する凝集粒子の量が多い。
このため分散媒体に加えられて注入スラリーとしたとき
に、凝集粒子の解こう・分散が不十分であり、注入材と
しての機能が十分に活かされないことがわかった。The cement milk-based or LW-based injecting agent composed of Portland cement clinker, blast furnace slag and gypsum obtained by separating and pulverizing and mixing the components, when the Blaine specific surface area reaches about 10,000 cm 2 / g, for example. The amount of agglomerated particles composed of is large.
Therefore, it was found that when the slurry was added to the dispersion medium to form an injection slurry, the peptization and dispersion of the aggregated particles were insufficient, and the function as the injection material was not fully utilized.
【００１２】本発明者はこのような状況に鑑み本発明の
目的を達成するために、セメントクリンカーの種類、高
炉スラグの配合量およびせっこうの種類、添加量を変
え、更に粉砕方式の異なるミルを使用し種々の粉砕試験
を行った。得られた注入材については注入特性等を試験
した。In order to achieve the object of the present invention in view of the above situation, the present inventor changes the type of cement clinker, the blending amount of blast furnace slag and the type and addition amount of gypsum, and further mills having different crushing methods. Was used to perform various grinding tests. The injection characteristics and the like of the obtained injection material were tested.
【００１３】その結果、次の様な試験結果が得られた。
ポルトランドセメントクリンカーの種類については普
通、早強、中庸熱、耐硫酸塩、ＡＳＴＭ Ｔｙｐｅ４に
類似する低熱、Ｃ２Ｓ量約９０％等の高Ｃ２Ｓ系が使用
できるが、早強セメントクリンカーまたは耐硫酸塩セメ
ントクリンカー等の高Ｃ３Ｓ系クリンカーの使用が好ま
しいAs a result, the following test results were obtained.
As for the types of Portland cement clinker, normally, high strength, medium heat, sulfate resistant, low heat similar to ASTM Type 4 and high C 2 S system with C 2 S content of about 90% can be used. It is preferable to use a high C 3 S clinker such as a sulfate resistant cement clinker.
【００１４】高炉スラグは注入性状および注入後の硬
化、更には耐久性向上のために不可欠である。特に、岩
盤や砂地盤への浸透性を高めるためにはポルトランドセ
メントクリンカー、高炉スラグおよびせっこうの合計に
対して６０〜８５重量％の高炉スラグ量が必要である。
高炉スラグ量が６０重量％未満ではセメント微粒子の水
中での凝集の抑制が不十分となる。高炉スラグ量が８５
重量％を超えると、ポルトランドセメントクリンカーと
高炉スラグあるいはポルトランドセメントクリンカー、
高炉スラグおよびせっこうを混合粉砕すると、相対的に
高炉スラグの粗い粒子が多量残存し注入特性が劣化す
る。強度、耐久性の面からも高炉スラグ量は６０〜８５
重量％が好ましい。Blast furnace slag is indispensable for injection properties and hardening after injection, and for improving durability. Particularly, in order to enhance the permeability to rock or sand ground, a blast furnace slag amount of 60 to 85% by weight based on the total of Portland cement clinker, blast furnace slag and gypsum is required.
When the amount of blast furnace slag is less than 60% by weight, the suppression of aggregation of cement fine particles in water becomes insufficient. Blast furnace slag amount is 85
If it exceeds the weight percentage, Portland cement clinker and blast furnace slag or Portland cement clinker,
When blast furnace slag and gypsum are mixed and pulverized, relatively large amount of coarse particles of blast furnace slag remain and the injection characteristics deteriorate. The amount of blast furnace slag is 60 to 85 in terms of strength and durability.
Weight percent is preferred.
【００１５】本発明の注入材の原料であるポルトランド
セメントクリンカー、高炉スラグおよびせっこうのうち
少なくともポルトランドセメントクリンカーと高炉スラ
グとは混合粉砕することが不可欠である。一般構造用高
炉セメントの場合には、セメントクリンカーと高炉スラ
グを別々に粉砕することが好ましいといわれているが、
本発明のように非常に細かい粒群からなる注入材を製造
するためには分離粉砕ではなく混合粉砕に依らねばなら
ない。粉砕には竪型ローラミルやボールミル（チューブ
ミル）を使用するが、粉砕機構に相違があり、ローラミ
ルの方がボールミル（チューブミル）より好ましい。It is indispensable to mix and grind at least Portland cement clinker and blast furnace slag among Portland cement clinker, blast furnace slag and gypsum, which are raw materials of the injectable material of the present invention. In the case of blast furnace cement for general structure, it is said that it is preferable to separately crush the cement clinker and blast furnace slag,
As in the present invention, in order to produce an injecting material composed of very fine particle groups, it is necessary to rely on mixed pulverization rather than separation pulverization. A vertical roller mill or a ball mill (tube mill) is used for the pulverization, but the roller mill is preferable to the ball mill (tube mill) because of the difference in the pulverization mechanism.
【００１６】使用するせっこうの特に好ましい形態は無
水せっこう（２型）である。せっこうの添加量は注入材
のＳＯ３基準で０．５〜３．０重量％であるが、好まし
くは１．２〜１．６重量％である。A particularly preferred form of gypsum used is anhydrous gypsum (type 2). The amount of gypsum added is 0.5 to 3.0% by weight, preferably 1.2 to 1.6% by weight, based on the SO 3 of the injection material.
【００１７】本発明の注入材の粉末度は、ブレーン比表
面積で６０００〜１２５００ｃｍ２／ｇである。ブレー
ン比表面積が６０００ｃｍ２／ｇ未満では最大粒径が大
きくなるため浸透性が低下する。ブレーン比表面積が１
２５００ｃｍ２／ｇを超えると高炉スラグの添加効果、
即ち水中におけるポルトランドセメントクリンカーの分
散性を向上させる効果が小さくなる。The fineness of the injection material of the present invention is 6000 to 12500 cm 2 / g in terms of Blaine specific surface area. If the Blaine specific surface area is less than 6000 cm 2 / g, the maximum particle size becomes large and the permeability decreases. Blaine specific surface area is 1
If it exceeds 2500 cm 2 / g, the effect of adding blast furnace slag,
That is, the effect of improving the dispersibility of Portland cement clinker in water is reduced.
【００１８】なお、本発明の注入材に本発明の目的を損
なわない範囲で各種のセメント混和剤、即ちＡＥ剤、Ａ
Ｅ減水剤、高性能減水剤、発泡剤、起泡剤、急結剤、防
錆剤、防水剤等を混合しうることは勿論である。It should be noted that various types of cement admixtures, that is, AE agents, A, etc., can be added to the injection material of the present invention within the range not impairing the object of the present invention.
It goes without saying that the E water reducing agent, the high performance water reducing agent, the foaming agent, the foaming agent, the quick-setting agent, the rust preventive, the waterproof agent and the like can be mixed.
【００１９】[0019]
【作用】セメント系注入材の機能を高めるために通常注
入材の粒度を細かくする。しかし、単に注入材の構成粒
子を微細に粉砕するだけでは注入材の特に超微粉粒群の
凝集を助長させる。このため優れたセメント系注入材を
製造するためには超微粉粒群の凝集を抑制することが極
めて重要になる。[Function] In order to enhance the function of the cement-based injection material, the particle size of the injection material is usually made fine. However, simply pulverizing the constituent particles of the injection material into fine particles promotes the agglomeration of the injection material, particularly the ultrafine particle group. Therefore, in order to produce an excellent cement-based injection material, it is extremely important to suppress the aggregation of the ultrafine powder particles.
【００２０】本発明はこの点に着目した研究の結果見出
された注入性状の優れた材料である。竪型ローラミルを
使用する混合粉砕を行って本発明の注入材を製造し、こ
の注入材と水を混合して調製したセメントミルクを顕微
鏡で観察すると、ポルトランドセメントクリンカー粒子
と高炉スラグ粒子は超微粉に至るまで水中で非常に良く
分散していることが確認された。これに対して、分離粉
砕品あるいは高炉スラグ量が６０％未満では、特にクリ
ンカー粒子の凝集が著しい。The present invention is a material having an excellent injection property, which was found as a result of research focusing on this point. Producing the injection material of the present invention by performing mixed pulverization using a vertical roller mill, and observing the cement milk prepared by mixing the injection material and water with a microscope, Portland cement clinker particles and blast furnace slag particles are ultrafine powder. It was confirmed that it was dispersed very well in water up to. On the other hand, when the amount of separated pulverized product or the amount of blast furnace slag is less than 60%, the agglomeration of clinker particles is particularly remarkable.
【００２１】混合粉砕により構成材料であるポルトラン
ドセメントクリンカーと高炉スラグを非常に細かく粉砕
した場合、ポルトランドセメントクリンカー粒子と高炉
スラグ粒子は均一に分散し、かつ緩やかに付着した状態
にあり、このため水中で良く分散するものと考えられ
る。このような現象はポルトランドセメントクリンカー
と高炉スラグの特定配合割合において生じ、高炉スラグ
含有量を６０〜８５重量％とする本発明の要件の範囲に
おいて本発明は顕著な効果を奏する。When the Portland cement clinker and the blast furnace slag, which are the constituent materials, are pulverized very finely by mixed pulverization, the Portland cement clinker particles and the blast furnace slag particles are uniformly dispersed and are in a state of being gently adhered to each other. It is thought to be well dispersed. Such a phenomenon occurs at a specific blending ratio of Portland cement clinker and blast furnace slag, and the present invention exerts a remarkable effect within the range of the requirement of the present invention in which the blast furnace slag content is 60 to 85% by weight.
【００２２】[0022]
【実施例】実施例および比較例に用いたポルトランドセ
メントクリンカーの化合物組成を表１に、また注入材の
構成成分、粉砕方式および粉末度を表２に示す。なお、
混合粉砕品はポルトランドセメントクリンカー、高炉ス
ラグおよびせっこうを竪型ローラミルで混合粉砕して得
られたものであり、分離粉砕品はポルトランドセメント
クリンカーとせっこうとの混合物および高炉スラグ単独
をそれぞれ竪型ローラミルでブレーン比表面積９２００
ｃｍ２／ｇを目標に粉砕し、その後両者を混合したもの
であるEXAMPLES Table 1 shows the compound composition of the Portland cement clinker used in Examples and Comparative Examples, and Table 2 shows the constituent components of the injecting material, the grinding method and the fineness. In addition,
The mixed pulverized product was obtained by mixing and pulverizing Portland cement clinker, blast furnace slag and gypsum in a vertical roller mill, and the separated pulverized product was a mixture of Portland cement clinker and gypsum and blast furnace slag alone in vertical type. Blaine specific surface area 9200 with roller mill
Crushed with a target of cm 2 / g, and then the two were mixed.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】実施例１〜８、比較例１〜８ 表２に示した注入材を用い、水セメント比を２００％ま
たは６００％とし、ナフタリンスルフォン酸ホルマリン
高縮合物を主成分とする高性能減水剤（花王（株）製、
商品名マイティ１５０）を注入材に対して２重量％添加
し、ジューサミキサで３０秒間攪拌してセメントミルク
を調製した。これらのセメントミルクについて微細間隙
への浸透性およびその硬化体の圧縮強度を測定した。Examples 1 to 8 and Comparative Examples 1 to 8 Using the injection materials shown in Table 2, the water-cement ratio was 200% or 600%, and the high-performance water-reducing water containing naphthalene sulfonate formalin high-condensate as the main component was used. Agent (manufactured by Kao Corporation,
2% by weight of the product name Mighty 150) was added to the injection material, and the mixture was stirred with a juice mixer for 30 seconds to prepare cement milk. The permeability of these cement milks into the fine pores and the compressive strength of the hardened product were measured.
【００２６】浸透性は、内径５０ｍｍ、高さ２００ｍｍ
の円筒容器の底に径５０ｍｍ、高さ５ｍｍのガラスフィ
ルター（平均孔径４５μｍ）を取り付けた注入試験装置
を用い、水セメント比を６００％としたセメントミルク
１リットルを、１ｋｇｆ／ｃｍ２の加圧条件下で１０分
間通過させ浸透率を求めた。浸透率はセメントミルクの
固形分量に対するガラスフィルター通過後のセメントミ
ルクの固形分量の百分率で表示した。Permeability is 50 mm inside diameter and 200 mm height
1 liter of cement milk with a water-cement ratio of 600% was pressed at 1 kgf / cm 2 using an injection tester in which a glass filter (average pore diameter 45 μm) having a diameter of 50 mm and a height of 5 mm was attached to the bottom of the cylindrical container of Permeability was determined by passing the solution under the conditions for 10 minutes. The permeation rate was expressed as a percentage of the solid content of the cement milk after passing through the glass filter with respect to the solid content of the cement milk.
【００２７】硬化体強度は、水セメント比を２００％と
したセメントミルクを、その沈降、硬化後の高さが約
６．５ｃｍになるように型枠に充填し、表面をポリエチ
レンシートで密封して２０℃で２８日間養生した後脱型
し、得られたφ３×６ｃｍの供試体について圧縮強度を
測定した。これらの結果を表３に示す。For the strength of the hardened product, cement milk with a water-cement ratio of 200% was filled in a mold so that the height after sedimentation and hardening would be about 6.5 cm, and the surface was sealed with a polyethylene sheet. After curing at 20 ° C. for 28 days, the mold was demolded, and the compressive strength of the obtained φ3 × 6 cm specimen was measured. The results are shown in Table 3.
【００２８】[0028]
【表３】 [Table 3]
【００２９】微細間隙への注入材の浸透性および硬化体
圧縮強度の試験結果から、粉砕方式は混合粉砕でなけれ
ばならないこと、ポルトランドセメントクリンカーは早
強または耐硫酸塩クリンカーが好ましいこと、高炉スラ
グ含有量６０〜８５重量％、ブレーン比表面積６０００
〜１２５００ｃｍ２／ｇの注入材が優れた性状を有する
ことが分かる。From the test results of the permeability of the injection material into the fine gaps and the compression strength of the hardened body, the crushing method must be mixed crushing, the Portland cement clinker is preferably fast-strength or sulfate resistant clinker, and the blast furnace slag Content 60-85% by weight, Blaine specific surface area 6000
It can be seen that the injectable material having a density of up to 12500 cm 2 / g has excellent properties.
【００３０】実施例９、１０、比較例９、１０ 表２に示した注入材Ｎｏ．２、６、１０および１１を用
い、水セメント比を６００％とし、前述の高性能減水剤
を注入材に対して２重量％添加し、ジューサミキサで３
０秒間攪拌してセメントミルクを調製した。調製後２０
分間攪拌した後、セメント協会標準試験方法ＣＡＪＳ
Ｋ−０２「４５μｍ網ふるいによるセメントの粉末度試
験方法」に準じ、網ふるい残分量を測定した。結果を表
４に示す。Examples 9, 10 and Comparative Examples 9, 10 Injection materials Nos. 2, 6, 10 and 11 were used, the water cement ratio was set to 600%, the above-mentioned high performance water reducing agent was added to the injection material in an amount of 2% by weight, and the mixture was mixed with a juicer mixer to 3%.
Cement milk was prepared by stirring for 0 seconds. 20 after preparation
After stirring for a minute, Cement Association Standard Test Method CAJS
The residual amount of the mesh sieve was measured in accordance with K-02 “Method for testing the degree of powderiness of cement using a 45 μm mesh sieve”. The results are shown in Table 4.
【００３１】[0031]
【表４】 [Table 4]
【００３２】比較例９及び比較例１０の注入材のブレー
ン比表面積はそれぞれ実施例９及び実施例１０のそれに
近似しているが、セメントミルク中では凝集物の形成が
顕著であり、これが微細間隙への浸透を阻害しているも
のと考えられる。この比較例９及び比較例１０の注入材
の４５μｍ網ふるい残査を走査型電子顕微鏡で観察した
結果、これらは粗粒の一次粒子ではなく、非常に細かい
粒子の凝集物であることが確認された。The Blaine specific surface areas of the injection materials of Comparative Example 9 and Comparative Example 10 are similar to those of Example 9 and Example 10, respectively, but the formation of agglomerates is remarkable in cement milk, and this is due to the formation of fine gaps. It is thought that it inhibits the penetration of As a result of observing the 45 μm net sieving residue of the injection materials of Comparative Example 9 and Comparative Example 10 with a scanning electron microscope, it was confirmed that they were not primary particles of coarse particles but aggregates of very fine particles. It was
【００３３】[0033]
【発明の効果】本発明の注入材には次のような効果があ
る。 （１）注入材中の構成粒子の付着が非常に少なく、セメ
ントミルクにしたときあるいは水ガラススラリーとした
ときに、微粉粒子が水または水ガラスに良く分散する。 （２）分散された注入材粒子は岩盤の亀裂や砂地盤の間
隙へ良く浸透する。 （３）微細間隙に浸透した注入材は、硬化した後地盤改
良材としての主目的である地盤強化、止水を果たすこと
ができる。 （４）以上の結果によって山岳土木や都市土木工事での
注入材として優れた特性を発揮する。The injection material of the present invention has the following effects. (1) Adhesion of constituent particles in the injectable material is very small, and fine powder particles are well dispersed in water or water glass when used as cement milk or as water glass slurry. (2) The dispersed injection material particles penetrate well into the cracks in the rock and the gaps in the sand ground. (3) The injection material that has penetrated into the fine gaps can fulfill the main purpose as a ground improvement material after hardening, that is, strengthening the ground and stopping water. (4) The above results demonstrate excellent properties as an injection material for mountain civil engineering and urban civil engineering.
Claims (1)
高炉スラグを混合粉砕して得られるブレーン比表面積が
６０００〜１２５００ｃｍ２／ｇの混合物とせっこうと
からなる組成物あるいはポルトランドセメントクリンカ
ー、高炉スラグおよびせっこうを混合粉砕して得られる
ブレーン比表面積が６０００〜１２５００ｃｍ２／ｇの
組成物であって、該組成物中の高炉スラグ含有量が６０
〜８５重量％であり、且つせっこう含有量がＳＯ３基準
で０．５〜３．０重量％である地盤改良用注入材。1. A composition comprising a mixture having a Blaine specific surface area of 6000 to 12500 cm 2 / g obtained by mixing and crushing Portland cement clinker and blast furnace slag, or mixing Portland cement clinker, blast furnace slag and gypsum. A composition having a Blaine specific surface area of 6000 to 12500 cm 2 / g obtained by crushing, and having a blast furnace slag content of 60 in the composition.
A ground improvement injection material having a content of ˜85% by weight and a gypsum content of 0.5 to 3.0% by weight based on SO 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4227707A JP2894529B2 (en) | 1992-07-14 | 1992-07-14 | Injection material for ground improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4227707A JP2894529B2 (en) | 1992-07-14 | 1992-07-14 | Injection material for ground improvement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0633057A true JPH0633057A (en) | 1994-02-08 |
| JP2894529B2 JP2894529B2 (en) | 1999-05-24 |
Family
ID=16865095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4227707A Expired - Lifetime JP2894529B2 (en) | 1992-07-14 | 1992-07-14 | Injection material for ground improvement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2894529B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751102A1 (en) * | 1995-06-29 | 1997-01-02 | Groupe Origny | Hydraulic binder for the treatment of earth or clavey materials |
| JP2001064648A (en) * | 1999-08-27 | 2001-03-13 | Sumitomo Osaka Cement Co Ltd | Plastic grouting material |
| WO2007091629A1 (en) * | 2006-02-09 | 2007-08-16 | Nittetsu Cement Co., Ltd. | Grouting material |
| JP2007238428A (en) * | 2006-02-07 | 2007-09-20 | Nittetsu Cement Co Ltd | Ultrafine particle grout composition |
| US7410537B2 (en) * | 2006-07-25 | 2008-08-12 | Council Of Scientific & Industrial Research | Process for the production of Portland slag cement using granulated blast furnace slag |
| WO2017085689A1 (en) * | 2015-11-19 | 2017-05-26 | Cementos Argos S.A. | Method for obtaining microcements for injection grouts and microcement obtained |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63199283A (en) * | 1987-02-12 | 1988-08-17 | Nittetsu Cement Kk | Solidifying material consisting of hydraulic fine powder |
-
1992
- 1992-07-14 JP JP4227707A patent/JP2894529B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63199283A (en) * | 1987-02-12 | 1988-08-17 | Nittetsu Cement Kk | Solidifying material consisting of hydraulic fine powder |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751102A1 (en) * | 1995-06-29 | 1997-01-02 | Groupe Origny | Hydraulic binder for the treatment of earth or clavey materials |
| FR2736047A1 (en) * | 1995-06-29 | 1997-01-03 | Groupe Origny | HYDRAULIC BINDER FOR TREATING SOILS OR CLAY MATERIALS |
| JP2001064648A (en) * | 1999-08-27 | 2001-03-13 | Sumitomo Osaka Cement Co Ltd | Plastic grouting material |
| JP2007238428A (en) * | 2006-02-07 | 2007-09-20 | Nittetsu Cement Co Ltd | Ultrafine particle grout composition |
| WO2007091629A1 (en) * | 2006-02-09 | 2007-08-16 | Nittetsu Cement Co., Ltd. | Grouting material |
| US7559987B2 (en) | 2006-02-09 | 2009-07-14 | Nittetsu Cement Co., Ltd. | Grouting material |
| US7410537B2 (en) * | 2006-07-25 | 2008-08-12 | Council Of Scientific & Industrial Research | Process for the production of Portland slag cement using granulated blast furnace slag |
| WO2017085689A1 (en) * | 2015-11-19 | 2017-05-26 | Cementos Argos S.A. | Method for obtaining microcements for injection grouts and microcement obtained |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2894529B2 (en) | 1999-05-24 |
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