JP2000178052A - Liquid cement quick-setting agent - Google Patents
Liquid cement quick-setting agentInfo
- Publication number
- JP2000178052A JP2000178052A JP10354065A JP35406598A JP2000178052A JP 2000178052 A JP2000178052 A JP 2000178052A JP 10354065 A JP10354065 A JP 10354065A JP 35406598 A JP35406598 A JP 35406598A JP 2000178052 A JP2000178052 A JP 2000178052A
- Authority
- JP
- Japan
- Prior art keywords
- quick
- setting
- particles
- weight
- substance
- 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.)
- Pending
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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/148—Aluminium-sulfate
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、トンネルや地下構
造物等の工事に際し、天井や壁面にモルタルやコンクリ
ート等のセメント系材料を吹き付け施工する際に使用す
る液体セメント急結剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid cement quick-setting admixture used for spraying a cement-based material such as mortar or concrete onto a ceiling or a wall surface when constructing a tunnel or an underground structure.
【０００２】[0002]
【従来の技術】従来から、トンネルや地下構造物等の覆
工工法として、型枠を使用せずに急結剤と圧送空気を利
用してモルタルやコンクリートを施工面に直接吹き付け
る、乾式及び湿式の吹付け工法が知られている。かかる
工法に主に使用されている吹付け剤は、カルシウムアル
ミネート系又はカルシウムサルフォアルミネート系の粉
体急結剤であるが、当該急結剤は粉体ゆえ、吹付け時に
大量の粉塵が発生し、吹付けコンクリートのリバウンド
率が高く、作業環境を悪化させるという欠点があった。2. Description of the Related Art Conventionally, as a method of lining tunnels and underground structures, dry and wet mortar and concrete are directly sprayed onto a construction surface using a quick-setting agent and compressed air without using a formwork. A spraying method is known. The spraying agent mainly used in such a method is a calcium aluminate-based or calcium sulfoaluminate-based powder quick-setting agent, but since the quick-setting agent is a powder, a large amount of dust is generated at the time of spraying. And the rebound rate of the shotcrete is high, which has the disadvantage of deteriorating the working environment.
【０００３】かかる欠点を解決する手段として液体急結
剤の使用が提案されている。例えば、特開昭６１−４０
８５３号公報では、２０μ以下の懸濁粒子と急結物質と
を含有する液体急結剤が提案されている。かかる液体急
結剤は、従来の急結剤（特開昭５０―１６７１７号公
報）の欠点を解決して、急結力が大きく、粉塵の発生を
低減し、また沈殿分離もしにくい等の効果があるとされ
ている。[0003] As a means for solving such a drawback, the use of a liquid quick-setting agent has been proposed. For example, JP-A-61-40
No. 853 proposes a liquid quick-setting admixture containing suspended particles of 20 μm or less and a quick-setting substance. Such a liquid quick-setting admixture solves the drawbacks of the conventional quick-setting admixture (Japanese Patent Laid-Open Publication No. Sho 50-16717), and has an effect that the quick-setting power is large, the generation of dust is reduced, and sedimentation and separation are difficult. It is said that there is.
【０００４】しかし、近年の交通量増大に対処すべく高
速道路等のトンネルは大型化の傾向にあるが、かかる大
断面のトンネル吹付け工事では、覆工に必要な吹付けコ
ンクリート量が増加するため、コスト低減等の観点から
吹付けコンクリートの更なる性能向上が要請されてい
る。即ち、吹付けコンクリートの付着力及び初期・長期
強度の向上による覆工厚みの薄肉化並びに吹付けコンク
リートのリバウンド率の低減等による材料コストの低減
等が、従来に増して強く要請されている。例えば、吹付
けコンクリートの設計基準は、従来は、一般に材齢１日
の初期強度８N/mm 2以上、材齢２８日の長期強度１８N/m
m2以上、リバウンド率３０％以下（トンネル標準示方書
山岳工法編等）であったところ、最近の大断面のトン
ネル工事においては、初期強度１０N/mm2以上、長期強
度３６N/mm2以上、リバウンド率２０％以下が要求され
ている。However, in order to cope with the recent increase in traffic volume,
Tunnels such as expressways tend to be large, but such large
In cross section tunnel spraying work, the spray
Since the amount of concrete increases, from the viewpoint of cost reduction, etc.
There is a demand for further improvements in shotcrete performance.
You. That is, the adhesion of shotcrete and the initial and long term
Thinner lining thickness due to improved strength and sprayed conc
Reduction of material cost by reducing the rebound rate of REIT
Are strongly demanded more than before. For example, spraying
In the past, the design standard for concrete was generally one day of age.
Initial strength of 8N / mm TwoAs mentioned above, the long-term strength of 28 days old 18 N / m
mTwoAbove, rebound rate 30% or less (Tunnel Standard Specifications
Mountain construction method, etc.)
In tunnel construction, the initial strength is 10 N / mmTwoAbove, long-term
Degree 36N / mmTwoAs mentioned above, a rebound rate of 20% or less is required.
ing.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、かかる最近
の吹付けコンクリートに関する要求に対応すべく、吹付
けコンクリートの付着力及び初期・長期強度の更なる向
上、並びに吹付けコンクリートのリバウンド率の更なる
低減等に優れた液体セメント急結剤（以下、「本急結
剤」という）を提供することを目的とする。SUMMARY OF THE INVENTION In order to respond to the recent demands for shotcrete, the present invention aims to further improve the adhesion and initial / long-term strength of shotcrete, and to reduce the rebound rate of shotcrete. It is an object of the present invention to provide a liquid cement quick-setting admixture (hereinafter referred to as “the quick-setting admixture”) which is excellent in further reduction and the like.
【０００６】[0006]
【課題を解決するための手段】具体的には、本発明は
（１）急結性物質と、平均粒径が１μｍ以下の懸濁粒子
を含む本急結剤を提供する。また、（２）急結性物質
と、平均粒径が１μｍ以下であって、かつ５μｍ以上の
粒子が全粒子重量に対し２０重量％以下の懸濁粒子を含
む本急結剤も提供する。更に、（３）急結性物質が水溶
性物質である上記（１）又は（２）の本急結剤をも提供
するものである。Specifically, the present invention provides (1) a quick-setting agent comprising a quick-setting substance and suspended particles having an average particle size of 1 μm or less. The present invention also provides (2) a quick-setting substance and the quick-setting agent containing particles having an average particle size of 1 μm or less and having a particle size of 5 μm or more and 20% by weight or less based on the total particle weight. Further, (3) the present quick-setting agent according to the above (1) or (2), wherein the quick-setting substance is a water-soluble substance.
【０００７】[0007]
【発明の実施の形態】即ち、本発明に係る本急結剤は、
懸濁粒子（急結性物質以外の無機質の粒子を意味し、以
下、「本懸濁粒子」という）及び急結性物質（以下、
「本急結性物質」という）を主たる成分として水に分散
又は溶解させたものであり、以下に各成分について詳説
する。BEST MODE FOR CARRYING OUT THE INVENTION That is, the quick-setting agent according to the present invention comprises
Suspended particles (meaning inorganic particles other than the quick-setting substance, hereinafter referred to as “the present suspended particles”) and quick-setting substance (hereinafter,
The substance is referred to as “the quick-setting substance” and is dispersed or dissolved in water as a main component, and each component will be described in detail below.
【０００８】（ａ）本懸濁粒子について 本懸濁粒子の平均粒径は１μｍ以下が好ましく、更に
０．５μｍ以下が好ましい。また、本懸濁粒子の平均粒
径が１μｍ以下であって、かつ５μｍ以上の粒子が全粒
子重量に対し２０重量％以下がより好ましく、本懸濁粒
子の平均粒径が０．５μｍ以下であって、かつ５μｍ以
上の粒子が全粒子重量に対し２０重量％以下が更に好ま
しい。ここでいう「全粒子重量」とは、懸濁粒子と未溶
解の急結性物質の合計重量を意味する。本懸濁粒子はセ
メント粒子（粒径は約１０〜８０μｍ）より微細である
ため、セメント粒子間を密に充填して吹付けコンクリー
トに粘着性を付与し、吹付け面への付着を向上させる機
能を有する。従って、平均粒径が１μｍを超えると、粘
着性及び付着性が十分でない。また、５μｍ以上の粒子
が２０重量％を超えて含まれると、該粒子の沈殿が見ら
れ本急結剤の長期の貯蔵安定性が良好でなくなる。(A) Regarding the Suspended Particles The average particle diameter of the suspended particles is preferably 1 μm or less, more preferably 0.5 μm or less. Further, the average particle size of the present suspended particles is 1 μm or less, and the particles of 5 μm or more are more preferably 20% by weight or less based on the total particle weight, and the average particle size of the present suspended particles is 0.5 μm or less. More preferably, the content of the particles having a size of 5 μm or more is 20% by weight or less based on the total weight of the particles. The term “total particle weight” as used herein means the total weight of suspended particles and undissolved quick-setting substance. Since the suspended particles are finer than the cement particles (the particle size is about 10 to 80 μm), the space between the cement particles is densely filled to give the shotcrete an adhesive property and to improve the adhesion to the shot surface. Has functions. Therefore, if the average particle size exceeds 1 μm, the tackiness and adhesion are not sufficient. On the other hand, when particles having a particle size of 5 μm or more are contained in an amount exceeding 20% by weight, precipitation of the particles is observed, and the long-term storage stability of the quick-setting agent becomes poor.
【０００９】また、本懸濁粒子の成分は、シリカ質物質
が好ましく、沈降シリカ、シリカヒューム、フライアッ
シュ、アルミノケイ酸塩、マグネシウムケイ酸塩、メタ
カオリン、スラグ、ベントナイト等の１種又は２種以上
が使用できる。かかる粒子は、セメント中のエーライト
及びビーライトの水和に伴い水硬性を発揮して、コンク
リート強度を増進させる効果があり、特に、粒径を上記
の範囲に調整することで、長期のみならず初期の強度向
上にも大きく寄与する。[0009] The component of the present suspended particles is preferably a siliceous substance, and one or more of precipitated silica, silica fume, fly ash, aluminosilicate, magnesium silicate, metakaolin, slag, bentonite and the like. Can be used. Such particles have the effect of exhibiting hydraulic properties with the hydration of alite and belite in cement and increasing the concrete strength, and in particular, by adjusting the particle size to the above range, only for a long time. It also greatly contributes to the initial strength improvement.
【００１０】本懸濁粒子の含有量は、本急結剤重量に対
し３〜２０重量％が好ましく、５〜１５重量％がより好
ましい。本懸濁粒子の含有量が３重量％未満では、付着
性の向上及び強度増進が十分でなく、また２０重量％を
超えて使用すると、本急結性物質の含有量が相対的に低
下して、急結性が低下する。The content of the suspended particles is preferably 3 to 20% by weight, more preferably 5 to 15% by weight, based on the weight of the quick-setting binder. When the content of the present suspended particles is less than 3% by weight, the adhesion and the strength are not sufficiently improved, and when the content exceeds 20% by weight, the content of the quick-setting substance is relatively reduced. And the quick setting property is reduced.
【００１１】（ｂ）本急結性物質について 本急結性物質は水溶性であることを要する。粉塵の低減
のため、本急結剤は水溶液の状態で使用するのが好まし
いからである。もっとも、本急結性物質は、全てが水に
溶解している必要はなく、一部は未溶解の状態で分散し
て存在していてもよい。かかる状態でも、粉塵の低減に
悪影響を及ぼすことなく、寧ろ、溶解度以上の急結性物
質を含有できるため、本急結剤の急結性を任意に高める
ことが可能となる。吹付け時にコンクリートと合流する
と、未溶解の急結性物質は吹付けコンクリート中で溶解
し、急結性物質の濃度が高まるからである。但し、本急
結剤の貯蔵安定性を考慮すると、上記と同様に本急結性
物質の未溶解部分の内５μｍ以上の部分が、本懸濁粒子
を含む全粒子重量に対し２０重量％以下となるように調
整するとよい。かかる観点から、本急結性物質は、例え
ば、硫酸アルミニウム等のアルミニウム塩、硫酸マグネ
シウム等のマグネシウム塩、アルミン酸ソーダ、アルミ
ン酸カリウム、アルミン酸カルシウム等のアルミン酸
塩、又は炭酸ソーダ、炭酸カリウム等のアルカリ炭酸塩
等の１種又は２種以上が適当である。特に、急結性、経
済性の面から硫酸アルミニウムが好適である。(B) About the quick-setting substance The quick-setting substance must be water-soluble. This is because it is preferable to use the quick-setting agent in an aqueous solution state in order to reduce dust. However, the quick-setting substance does not need to be completely dissolved in water, and may be present in a partially undissolved state. Even in such a state, a quick-setting substance having a solubility higher than the solubility can be contained without adversely affecting the reduction of dust, so that the quick-setting property of the quick-setting agent can be arbitrarily increased. This is because, when the concrete is joined with the concrete at the time of spraying, the undissolved quick-setting substance is dissolved in the sprayed concrete, and the concentration of the quick-setting substance increases. However, in consideration of the storage stability of the quick-setting admixture, the portion of 5 μm or more of the undissolved portion of the quick-setting substance is 20% by weight or less based on the total weight of the particles including the present suspended particles, as described above. It is good to adjust so that it becomes. From this viewpoint, the quick-setting substance is, for example, an aluminum salt such as aluminum sulfate, a magnesium salt such as magnesium sulfate, sodium aluminate, potassium aluminate, an aluminate such as calcium aluminate, or sodium carbonate, potassium carbonate One or two or more of such alkali carbonates are suitable. In particular, aluminum sulfate is preferred from the viewpoint of quick setting and economy.
【００１２】本急結性物質の含有量は、本急結剤重量に
対し、２０〜５０重量％が好ましく、２０〜４０重量％
がより好ましい。本急結性物質の含有量が２０重量％未
満では急結性が十分でなく、５０重量％を超えて用いる
と、本懸濁粒子の含有量が相対的に少なくなり、付着性
等の向上が図れないからである。The content of the quick-setting substance is preferably 20 to 50% by weight, more preferably 20 to 40% by weight, based on the weight of the quick-setting agent.
Is more preferred. If the content of the quick-setting substance is less than 20% by weight, the quick-setting property is not sufficient, and if it is used in excess of 50% by weight, the content of the present suspended particles becomes relatively small, and the adhesion and the like are improved. Is not possible.
【００１３】本急結剤の添加量は、急結性物質の含有量
や用いるセメントの種類によって変わるが、セメント１
００重量部に対し５〜３０重量部が好ましい。５重量部
未満では急結性が低く、３０重量部を超えて使用する
と、長期強度が低下する傾向にあるうえ、コスト高にな
り実用的でない。The amount of the quick-setting additive varies depending on the content of the quick-setting substance and the type of cement used.
5 to 30 parts by weight per 100 parts by weight is preferred. If the amount is less than 5 parts by weight, the quick setting property is low. If the amount is more than 30 parts by weight, the long-term strength tends to decrease, and the cost increases, which is not practical.
【００１４】尚、本急結剤には、吹付けコンクリートの
流動性・付着性等の諸物性の改善のため減水剤、高性能
ＡＥ減水剤、増粘剤、急結剤等の混和剤を、また、本急
結剤の貯蔵安定性向上のため有機アミン等の添加剤を混
合・併用することも可能である。In order to improve various properties such as fluidity and adhesion of shotcrete, admixtures such as a water reducing agent, a high-performance AE water reducing agent, a thickening agent and a quick setting agent are used as the quick setting agent. It is also possible to mix and use additives such as organic amines for improving the storage stability of the quick-setting agent.
【００１５】[0015]
【実施例】以下に、本発明の実施例を示すが、これらは
例示であり、本発明を限定するものではない。EXAMPLES Examples of the present invention will be described below, but these are exemplifications and do not limit the present invention.
【００１６】（実施例及び比較例）急結性物質として硫
酸アルミニウムを、また、懸濁粒子として沈降シリカを
用いて表１に示す配合の液体セメント急結剤を調整し、
表２に示す配合のコンクリートを製造して吹付け試験を
行った。試験は、混練りしたコンクリートをポンプで圧
送し、吹付けノズルの手前３ｍで液体セメント急結剤を
セメント１００重量部に対し１２重量部添加して、プル
アウト試験用型枠、木製型枠、及び内側にラスボードを
張り付けた幅２．５×奥行き３．０×高さ３．０ｍのボ
ックスカルバートにそれぞれ吹付けた。(Examples and Comparative Examples) A liquid cement quick-setting agent having the composition shown in Table 1 was prepared by using aluminum sulfate as a quick-setting substance and precipitated silica as suspended particles.
Concrete having the composition shown in Table 2 was manufactured and a spray test was performed. In the test, the kneaded concrete was pumped by a pump, and 12 parts by weight of a liquid cement quick-setting admixture was added to 100 parts by weight of cement at 3 m before the spray nozzle, and a pull-out test formwork, a wooden formwork, and Each piece was sprayed on a box culvert having a width of 2.5 × depth 3.0 × height 3.0 m with a lath board attached to the inside.
【００１７】吹付けコンクリートの強度は、吹付け後の
材齢１日では、プルアウト型供試体を用いてプルアウト
試験により、材齢２８日では、木製型供試体から採取し
た試験体（直径５０ｍｍ、長さ１００ｍｍ）の圧縮強度
試験により求めた。また、急結性は、吹付け直後の吹付
けコンクリートの硬化性状を指触により評価し、以下の
４段階の格付けを行った。 ◎：急結性はかなり速く、吹付けコンクリートは十分に
硬い。 ○：急結性は良好であるが、◎ほどはコンクリートは硬
くない。 △：急結性はやや遅く、吹付けコンクリート表面も柔ら
かい。 ×：急結性は遅く、吹付けコンクリートの硬化は不十
分。 更に、リバウンド率は上記のボックスカルバートに吹付
けた後に、付着せずに落下した吹付けコンクリートの重
量を測定し、下記の式から算出した。 リバウンド率（％）＝１００×（吹付け時にボックスカ
ルバートに付着せずに落下した吹付けコンクリートの重
量）／（吹付けに使用した吹付けコンクリートの重量） 以上の試験結果を表３に示した。The strength of the shotcrete was determined by a pull-out test using a pull-out type specimen at an age of 1 day after spraying, and a specimen (diameter: 50 mm, (Length 100 mm). In addition, the quick setting property was evaluated by hardening properties of shotcrete immediately after spraying by finger touch, and the following four grades were given. ：: Quick setting is very fast, and shotcrete is sufficiently hard. ：: Quick setting is good, but concrete is not as hard as ◎. Δ: Quick setting is rather slow, and the sprayed concrete surface is also soft. X: Quick setting is slow, and the hardening of shotcrete is insufficient. Further, the rebound rate was calculated from the following equation by measuring the weight of the shot concrete dropped without adhering after spraying on the box culvert. Rebound rate (%) = 100 × (weight of shotcrete dropped without adhering to box culvert during spraying) / (weight of shotcrete used for spraying) The above test results are shown in Table 3. .
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】[0020]
【表３】 [Table 3]
【００２１】表３の結果から、急結剤Ａ〜Ｇは何れも、
上述した最近の大断面のトンネル工事における吹付けコ
ンクリートの設計基準（材齢１日強度１０N/mm2以上、
材齢２８日強度３６N/mm2以上、リバウンド率２０％以
下）を満足し、急結性にも優れることがわかる。一方、
平均粒径が１μｍを超える懸濁粒子を含有する急結剤Ｈ
〜Ｋは、従来の基準（材齢１日強度８N/mm2以上、材齢
２８日強度１８N/mm2以上、リバウンド率３０％以下）
は満たすものの、最近の基準は満たさないことがわか
る。From the results in Table 3, all of the quick setting agents A to G
Design criteria for shotcrete in recent large-section tunnel construction described above (one-day strength of 10 N / mm 2 or more,
28 days old strength of 36 N / mm 2 or more, rebound rate of 20% or less), and excellent quick setting. on the other hand,
Quick-setting agent H containing suspended particles having an average particle size exceeding 1 μm
~ K is the conventional standard (age 1 day strength 8N / mm 2 or more, age 28 day strength 18N / mm 2 or more, rebound rate 30% or less)
Satisfies, but does not meet recent standards.
【００２２】[0022]
【発明の効果】本発明の液体セメント急結剤は、吹付け
コンクリートの急結性、初期・長期強度を向上させると
共に、付着力を高めてリバウンド率を低減できるので、
吹付け材料のコスト低減に資することができる。また、
本発明の急結剤は使用時の粉塵の発生が少なく、作業環
境の悪化を回避できる。The liquid cement quick-setting agent of the present invention can improve the quick-setting property and initial / long-term strength of shotcrete, and can increase the adhesive force to reduce the rebound rate.
This can contribute to cost reduction of the spray material. Also,
The quick-setting agent of the present invention generates less dust during use, and can avoid deterioration of the working environment.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 新井 範彦 千葉県佐倉市大作２丁目４番２号 太平洋 セメント株式会社佐倉研究所内 Ｆターム(参考） 2D055 DB00 KA08 4G012 MA01 MB13 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Norihiko Arai 2-4-2, Daisaku, Sakura City, Chiba Pref.
Claims (3)
濁粒子を含む液体セメント急結剤。1. A liquid cement quick setting agent comprising a quick setting substance and suspended particles having an average particle size of 1 μm or less.
あって、かつ５μｍ以上の粒子が全粒子重量に対し２０
重量％以下の懸濁粒子を含む液体セメント急結剤。2. The quick-setting substance and particles having an average particle size of 1 μm or less and 5 μm or more are used in an amount of 20% by weight based on the total particle weight.
Liquid cement quick setting agent containing up to wt.% Suspended particles.
又は２に記載の液体セメント急結剤。3. The quick-setting substance is a water-soluble substance.
Or the liquid cement quick setting agent according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10354065A JP2000178052A (en) | 1998-12-14 | 1998-12-14 | Liquid cement quick-setting agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10354065A JP2000178052A (en) | 1998-12-14 | 1998-12-14 | Liquid cement quick-setting agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000178052A true JP2000178052A (en) | 2000-06-27 |
Family
ID=18435070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10354065A Pending JP2000178052A (en) | 1998-12-14 | 1998-12-14 | Liquid cement quick-setting agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000178052A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002029799A (en) * | 2000-07-07 | 2002-01-29 | Denki Kagaku Kogyo Kk | Spraying admixture for slump reduction, spraying cement concrete and spraying method |
| JP2014019623A (en) * | 2012-07-20 | 2014-02-03 | Denki Kagaku Kogyo Kk | Suspension type cement quick-setting agent, and quick-setting cement concrete using the same |
| CN112745056A (en) * | 2021-01-14 | 2021-05-04 | 佛山市凯隽新建材科技有限公司 | Suspension type alkali-free liquid accelerator and preparation method thereof |
-
1998
- 1998-12-14 JP JP10354065A patent/JP2000178052A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002029799A (en) * | 2000-07-07 | 2002-01-29 | Denki Kagaku Kogyo Kk | Spraying admixture for slump reduction, spraying cement concrete and spraying method |
| JP2014019623A (en) * | 2012-07-20 | 2014-02-03 | Denki Kagaku Kogyo Kk | Suspension type cement quick-setting agent, and quick-setting cement concrete using the same |
| CN112745056A (en) * | 2021-01-14 | 2021-05-04 | 佛山市凯隽新建材科技有限公司 | Suspension type alkali-free liquid accelerator and preparation method thereof |
| CN112745056B (en) * | 2021-01-14 | 2021-09-21 | 佛山市凯隽新建材科技有限公司 | Suspension type alkali-free liquid accelerator and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH1087358A (en) | Additive for concrete spraying | |
| JP6989719B1 (en) | Two-form quick-setting admixture, spraying material and spraying method | |
| JPH10265247A (en) | Quickly settable spraying cement concrete | |
| JP2000178052A (en) | Liquid cement quick-setting agent | |
| JPH10212149A (en) | Spraying material and spraying technique using the same | |
| JP2000185952A (en) | Liquid accelerator for cement | |
| JP3483105B2 (en) | Quick setting material, spraying material, and spraying method | |
| JP2002226247A (en) | Blasting material and blasting process using the same | |
| JP4230629B2 (en) | Shotcrete construction method | |
| JP2000072514A (en) | Spraying material and spraying | |
| JP2003081664A (en) | Quick setting agent, quick setting agent slurry, spraying material, and spraying method using the same | |
| JP2000109353A (en) | Quick setting spray cement concrete and spraying method using the same | |
| JPH1171145A (en) | Quick setting material, spraying material and quick setting spraying cement concrete | |
| JP2516017B2 (en) | Curing accelerator | |
| JP2002220270A (en) | Spray material and spray technique using it | |
| JP4651134B2 (en) | Quick setting agent for high fluid spraying concrete | |
| JPH11199287A (en) | Setting accelerator and quick-setting spray cement concrete | |
| JP2004155654A (en) | Spraying material, and spraying method using the same | |
| JP2001181000A (en) | Rebound decreasing agent, cement concrete, method of manufacturing cement concrete and spraying process using them | |
| JPH11322397A (en) | Quick-setting spraying material | |
| JPH11180745A (en) | Accelerator, accelerating spray cement concrete and spraying method | |
| JP4883917B2 (en) | Production method of spray material | |
| JP2001019526A (en) | Spraying material and spraying method | |
| JPH10194815A (en) | Spraying material and spraying construction using the same | |
| JPH0365546A (en) | Shotcrete additive |