JP2000072514A - Spraying material and spraying - Google Patents
Spraying material and sprayingInfo
- Publication number
- JP2000072514A JP2000072514A JP10250218A JP25021898A JP2000072514A JP 2000072514 A JP2000072514 A JP 2000072514A JP 10250218 A JP10250218 A JP 10250218A JP 25021898 A JP25021898 A JP 25021898A JP 2000072514 A JP2000072514 A JP 2000072514A
- Authority
- JP
- Japan
- Prior art keywords
- quick
- spraying
- cement
- setting
- 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.)
- Granted
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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2103/44—Thickening, gelling or viscosity increasing agents
-
- 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、例えば、道路、鉄
道、及び導水路等のトンネルにおいて、露出した地山面
へ吹付ける時に使用する吹付材料に関する。なお、本発
明ではペースト、モルタル、及びコンクリートを総称し
てセメントコンクリートという。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray material used for spraying on an exposed ground surface, for example, in a tunnel such as a road, a railway, and a headrace. In the present invention, paste, mortar, and concrete are collectively referred to as cement concrete.
【０００２】[0002]
【従来の技術】従来、トンネル掘削等露出した地山の崩
落を防止するために急結材をコンクリートに配合した急
結性吹付コンクリートの吹付工法が行われている（特公
昭６０−４１４９号公報）。2. Description of the Related Art Conventionally, in order to prevent collapse of an exposed ground such as a tunnel excavation, a method of spraying quick-setting spray concrete in which a quick-setting material is mixed with concrete has been performed (Japanese Patent Publication No. Sho 60-4149). ).
【０００３】この吹付工法は、通常、掘削工事現場に設
置した計量混合プラントで、セメント、骨材、及び水を
混合して吹付コンクリートを調製し、アジテータ車で運
搬し、コンクリートポンプで圧送し、その途中に設けた
合流管で、他方から圧送した急結材と混合し、急結性吹
付コンクリートとして地山面に所定の厚みになるまで吹
付ける工法である。この吹付工法で使用する急結材とし
ては、カルシウムアルミネートに、アルカリ金属アルミ
ン酸塩やアルカリ金属炭酸塩等を混合したものが使用さ
れていた。[0003] In this spraying method, a concrete is usually prepared by mixing cement, aggregate, and water in a metering and mixing plant installed at an excavation site, transported by an agitator truck, and pumped by a concrete pump. This is a method of mixing with a quick-setting material pumped from the other by a confluent pipe provided in the middle and spraying it as a quick-setting sprayable concrete to a predetermined thickness on the ground surface. As a quick-setting material used in this spraying method, a mixture of calcium aluminate, alkali metal aluminate, alkali metal carbonate and the like has been used.
【０００４】[0004]
【発明が解決しようとする課題】この工法では、（吹付
けの際に模擬トンネルに付着せずに落下した急結性吹付
コンクリートの重量）／（吹付に使用した急結性吹付コ
ンクリート全体の重量）×１００（％）の式より算出さ
れるリバウンド（跳ね返り）率が１５〜３０重量％と大
きく、粉塵が多く、作業環境が悪かった。そのために、
粉塵マスクをしなければならず、作業性が低下してしま
うという課題があった。According to this method, (weight of quick-setting spray concrete that has fallen without adhering to the simulated tunnel during spraying) / (weight of the entire quick-setting spray concrete used for spraying) ) × 100 (%), the rebound (bounce) rate was as large as 15 to 30% by weight, the amount of dust was large, and the working environment was poor. for that reason,
There is a problem that a dust mask must be used and workability is reduced.
【０００５】この課題を解決すべく、リバウンド率や粉
塵量のより少ない工法が求められていたが、現状では未
だ充分満足できる吹付材料や吹付工法がなく、その改良
が望まれていた。In order to solve this problem, there has been a demand for a method of reducing the rebound rate and the amount of dust. However, at present, there is no sufficiently satisfactory spraying material or spraying method, and improvement thereof has been desired.
【０００６】本発明者は、この課題を種々検討した結
果、特定の吹付材料を使用することにより吹付時の付着
性を向上させ、リバウンド率を低減し、吹付時の粉塵量
を低減する知見を得て本発明を完成するに至った。As a result of various studies of this problem, the present inventor has found that by using a specific spraying material, the adhesion at the time of spraying is improved, the rebound rate is reduced, and the amount of dust at the time of spraying is reduced. As a result, the present invention has been completed.
【０００７】[0007]
【課題を解決するための手段】即ち、本発明は、減水剤
と増粘剤を、セメントコンクリート側と急結材側の別々
に配合してなり、セメントコンクリートと急結材とを含
有してなる吹付材料であり、増粘剤を混合してなるセメ
ントコンクリートと、減水剤と急結材を含有してなる急
結材混合物とを含有してなる吹付材料であり、減水剤を
混合してなるセメントコンクリートと、増粘剤を含有し
てなる急結材混合物とを含有してなる吹付材料であり、
減水剤がナフタレンスルホン酸ホルマリン縮合物である
該吹付材料であり、増粘剤がセルロース類である該吹付
材料であり、さらに、繊維状物質を含有してなる該吹付
材料である。そして、セメントコンクリートと急結材と
を含有してなる吹付材料であって、減水剤と増粘剤と
を、セメントコンクリート側と急結材側の別々に配合し
た後に混合してなることを特徴とする吹付工法である。That is, the present invention provides a water-reducing agent and a thickening agent which are separately compounded on the cement concrete side and the quick-setting material side. A spraying material comprising a cement concrete mixed with a thickener and a quick-setting mixture containing a water-reducing agent and a quick-setting material. Spraying material comprising a cement concrete and a quick-setting mixture containing a thickener,
The spray material in which the water reducing agent is a formalin condensate of naphthalenesulfonic acid, the spray material in which the thickener is celluloses, and the spray material further comprising a fibrous substance. A spraying material containing cement concrete and a quick-setting material, characterized in that a water reducing agent and a thickener are mixed separately after separately mixing the cement concrete side and the quick-setting material side. Spraying method.
【０００８】[0008]
【発明の実施の形態】以下、本発明を詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
【０００９】本発明で使用するセメントとしては、通常
用いられる、普通・早強・超早強等の各種ポルトランド
セメントや、これらのポルトランドセメントに高炉スラ
グ、フライアッシュ、又はシリカを混合した各種混合セ
メント、さらには、３ＣａＯ・ＳｉＯ2 や１１ＣａＯ・
７Ａｌ2 Ｏ3 ・ＣａＦ2 を主成分とする変性ポルトラン
ドセメント等が挙げられる。これらの中では、スランプ
ロスが少ない点で、普通ポルトランドセメントが好まし
い。As the cement used in the present invention, various portland cements, such as ordinary, fast and super fast, and various mixed cements obtained by mixing blast furnace slag, fly ash or silica with these portland cements are used. And 3CaO.SiO 2 and 11CaO.
Modified Portland cement containing 7Al 2 O 3 .CaF 2 as a main component. Of these, ordinary Portland cement is preferred because of its small slump loss.
【００１０】本発明で使用する急結材は、急結性吹付セ
メントコンクリートの短時間強度を向上させ、剥落を防
止でき、付着性が良くする効果を有する。[0010] The quick-setting material used in the present invention has the effect of improving the short-time strength of the quick-setting sprayed cement concrete, preventing spalling, and improving adhesion.
【００１１】急結材としては、アルミン酸ナトリウム、
炭酸ナトリウム、及びケイ酸ナトリウム等の無機塩系、
カルシウムアルミネート類等のセメント鉱物系、並び
に、グリセリンやトリエタノールアミン等の有機質系等
が挙げられる。As the quick setting material, sodium aluminate,
Inorganic carbonates such as sodium carbonate and sodium silicate,
Examples include cement minerals such as calcium aluminates, and organics such as glycerin and triethanolamine.
【００１２】これらの中では、強度発現性が良好な点
で、セメント鉱物系が好ましく、カルシウムアルミネー
ト類がより好ましく、カルシウムアルミネートが最も好
ましい。Of these, cement minerals are preferred, calcium aluminates are more preferred, and calcium aluminates are most preferred, in terms of good strength development.
【００１３】カルシウムアルミネートの中では、反応活
性の点で、非晶質のカルシウムアルミネートが好まし
く、１２ＣａＯ・７Ａｌ2 Ｏ3 （Ｃ12Ａ7 ）組成に対応
する熱処理物を急冷した非晶質のカルシウムアルミネー
トがより好ましい。Among calcium aluminates, an amorphous calcium aluminate is preferable in terms of reaction activity, and an amorphous calcium aluminate obtained by rapidly cooling a heat-treated product corresponding to a 12CaO · 7Al 2 O 3 (C 12 A 7 ) composition. Is more preferable.
【００１４】カルシウムアルミネートの粒度は、ブレー
ン値で３０００ｃｍ2 ／ｇ以上が好ましく、５０００ｃ
ｍ2 ／ｇ以上がより好ましい。３０００ｃｍ2 ／ｇ未満
だと初期強度発現性が低下するおそれがある。The particle size of calcium aluminate is preferably not less than 3,000 cm 2 / g in terms of Blaine value, and
m 2 / g or more is more preferable. If it is less than 3000 cm 2 / g, the initial strength development may be reduced.
【００１５】カルシウムアルミネートは単独でも急結材
として使用できるが、石膏、消石灰、アルミン酸ナトリ
ウム、及び／又は炭酸ナトリウム等と併用してもよい。
これらの中では、効果が大きい点で、石膏を併用するこ
とが好ましい。Calcium aluminate can be used alone or as a quick setting material, but may be used in combination with gypsum, slaked lime, sodium aluminate, and / or sodium carbonate.
Among them, it is preferable to use gypsum in combination because of its great effect.
【００１６】石膏は、市販のいずれの石膏も使用できる
が、ＩＩ型無水石膏や天然石膏が好ましい。As gypsum, any commercially available gypsum can be used, but type II anhydrous gypsum and natural gypsum are preferred.
【００１７】石膏の粒度は、ブレーン値で３０００ｃｍ
2 ／ｇ以上が好ましく、４０００〜７０００ｃｍ2 ／ｇ
がより好ましい。３０００ｃｍ2 ／ｇ未満だと初期強度
発現性が低下するおそれがある。The particle size of the gypsum is 3000 cm in Blaine value.
2 / g or more, preferably 4000 to 7000 cm 2 / g
Is more preferred. If it is less than 3000 cm 2 / g, the initial strength development may be reduced.
【００１８】石膏の使用量は、カルシウムアルミネート
１００重量部に対して、２０〜２５０重量部が好まし
く、７５〜１５０重量部がより好ましい。２０重量部未
満だと効果はなく、２５０重量部を越えると硬化時間が
長くなり、初期凝結性状が悪くなるおそれがある。The amount of gypsum used is preferably 20 to 250 parts by weight, more preferably 75 to 150 parts by weight, based on 100 parts by weight of calcium aluminate. If the amount is less than 20 parts by weight, there is no effect. If the amount exceeds 250 parts by weight, the curing time is prolonged, and the initial setting properties may be deteriorated.
【００１９】急結材の使用量は、セメント１００重量部
に対して、４〜３０重量部が好ましく、５〜２０重量部
がより好ましい。４重量部未満だと初期凝結が十分に得
られないおそれがあり、３０重量部を越えると、長期強
度発現性が低下したり、配管等が閉塞し、圧送性が低下
し、経済的に不利になるおそれがある。The amount of the quick setting material is preferably 4 to 30 parts by weight, more preferably 5 to 20 parts by weight, based on 100 parts by weight of cement. If the amount is less than 4 parts by weight, sufficient initial coagulation may not be obtained. If the amount exceeds 30 parts by weight, the long-term strength developability is reduced, the pipes and the like are blocked, the pumpability is reduced, and this is economically disadvantageous. Could be
【００２０】本発明で使用する減水剤は、セメントコン
クリートの流動性を改善し、吹付時の付着性を向上さ
せ、粉塵量やリバウンド率を低減する目的で使用するも
のをいい、液状や粉状のものいずれも使用できるが、粉
体急結材に配合する場合は粉状のものが好ましい。The water reducing agent used in the present invention is used for the purpose of improving the fluidity of cement concrete, improving the adhesion at the time of spraying, and reducing the amount of dust and the rebound rate. Any of these can be used, but when blended into a powder quick setting material, a powdery material is preferable.
【００２１】減水剤としては、ポリオール誘導体、リグ
ニンスルホン酸塩やその誘導体、及び高性能減水剤等が
挙げられ、これらの一種又は二種以上を使用してもよ
い。これらの中では、高強度発現性や分散安定性の点
で、高性能減水剤が好ましい。Examples of the water reducing agent include polyol derivatives, ligninsulfonates and derivatives thereof, and high-performance water reducing agents, and one or more of these may be used. Among these, a high-performance water reducing agent is preferred in terms of high strength development and dispersion stability.
【００２２】高性能減水剤により、急結材の使用量を少
なくでき、又、粉塵の発生量及びリバウンド率を極めて
少なくできる。By using a high-performance water reducing agent, the amount of quick-setting material used can be reduced, and the amount of dust generated and the rebound rate can be extremely reduced.
【００２３】高性能減水剤としては、アルキルアリルス
ルホン酸塩のホルマリン縮合物、ナフタレンスルホン酸
塩のホルマリン縮合物、メラミンスルホン酸塩のホルマ
リン縮合物、及びポリカルボン酸系高分子化合物等が挙
げられ、これらの一種又は二種以上を使用してもよい。
これらの中では、瞬時に増粘する点で、ナフタレンスル
ホン酸塩ホルマリン縮合物が好ましい。Examples of the high-performance water reducing agent include a formalin condensate of an alkyl allyl sulfonate, a formalin condensate of a naphthalene sulfonate, a formalin condensate of a melamine sulfonate, and a polycarboxylic acid polymer compound. Or one or more of these may be used.
Among these, a naphthalene sulfonate formalin condensate is preferred in that the viscosity increases instantaneously.
【００２４】減水剤の使用量は、セメント１００重量部
に対して、０．０５〜５重量部が好ましく、０．１〜３
重量部がより好ましい。０．０５重量部未満では効果が
なく、５重量部を越えると強度発現性を阻害する場合が
ある。The amount of the water reducing agent is preferably 0.05 to 5 parts by weight, preferably 0.1 to 3 parts by weight, per 100 parts by weight of cement.
Parts by weight are more preferred. If the amount is less than 0.05 part by weight, the effect is not obtained. If the amount is more than 5 parts by weight, strength development may be inhibited.
【００２５】本発明で使用する増粘剤は、瞬時に増粘
し、吹付時の粉塵を低減する効果を有する。The thickener used in the present invention has an effect of instantaneously thickening and reducing dust when sprayed.
【００２６】増粘剤としては、セルロース類、ポリエチ
レンオキサイド類、ポリアクリレート類、及びポバール
類等の水溶性ポリマーが挙げられ、これらの一種又は二
種以上を使用してもよい。これらの中では、瞬時に増粘
する点で、セルロース類が好ましい。Examples of the thickener include water-soluble polymers such as celluloses, polyethylene oxides, polyacrylates, and povals, and one or more of these may be used. Of these, celluloses are preferred in that they thicken instantaneously.
【００２７】セルロース類としては、メチルセルロー
ス、エチルセルロース、ヒドロキシエチルセルロース、
ヒドロキシプロピルセルロース、ヒドロキシエチルメチ
ルセルロース、ヒドロキシプロピルメチルセルロース、
及びヒドロキシエチルエチルセルロース等の水溶性のセ
ルロース類等が挙げられ、これらの一種又は二種以上を
使用してもよい。これらの中では、溶解性の点で、メチ
ルセルロースが好ましい。As the celluloses, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose,
Hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose,
And water-soluble celluloses such as hydroxyethylethylcellulose. One or more of these may be used. Of these, methyl cellulose is preferred from the viewpoint of solubility.
【００２８】増粘剤の使用量は、セメント１００重量部
に対して、０．００１〜０．５重量部が好ましく、０．
００５〜０．３重量部がより好ましい。０．００１重量
部未満だとセメントコンクリートの粘性が小さく吹付け
たときにダレが生じ、リバウンド率が大きくなるおそれ
があり、０．５重量部を越えるとセメントコンクリート
の粘性が大きくなり、セメントコンクリートの圧送性に
支障を生じり、強度発現性を阻害するおそれがある。The amount of the thickener to be used is preferably 0.001 to 0.5 part by weight, and more preferably 0.1 to 0.5 part by weight based on 100 parts by weight of cement.
005 to 0.3 parts by weight is more preferred. If the amount is less than 0.001 part by weight, the viscosity of the cement concrete is small and dripping may occur when sprayed, and the rebound rate may increase. If the amount exceeds 0.5 part by weight, the viscosity of the cement concrete increases and the cement concrete increases. This may hinder the pumping performance of the steel and impair the strength development.
【００２９】減水剤と増粘剤が合流混合されることによ
り瞬間的に増粘し、吹付時の急結材の添加率を低減で
き、更には通常の添加率にあつてはリバウンド率や粉塵
量を激しく低減することができる。When the water reducing agent and the thickener are mixed and mixed, the viscosity instantaneously increases, the addition rate of the quick-setting material at the time of spraying can be reduced, and the rebound rate and the dust The amount can be drastically reduced.
【００３０】減水剤と増粘剤はセメントコンクリートと
急結材のいずれかに別々に配合されていれば特に限定さ
れるものではないが、リバウンド率や粉塵量を低減でき
る点で、セメントコンクリート側に増粘剤を予め混合
し、急結材側に減水剤を予め混合し、両者を合流混合し
て施工することが好ましい。The water reducing agent and the thickener are not particularly limited as long as they are separately added to either the cement concrete or the quick-setting material. It is preferable to mix a thickener in advance, mix a water reducing agent in advance on the quick setting material side, and combine and mix the two.
【００３１】さらに、本発明では、セメントコンクリー
トの耐衝撃性や弾性の向上の点で、繊維状物質を使用す
ることが好ましい。Further, in the present invention, it is preferable to use a fibrous substance from the viewpoint of improving the impact resistance and elasticity of the cement concrete.
【００３２】本発明で使用する繊維状物質としては、無
機質や有機質いずれも使用できる。As the fibrous substance used in the present invention, both inorganic and organic substances can be used.
【００３３】無機質の繊維状物質としては、ガラス繊
維、炭素繊維、ロックウール、石綿、セラミック繊維、
及び金属繊維等が挙げられ、有機質の繊維状物質として
は、ビニロン繊維、ポリエチレン繊維、ポリプロピレン
繊維、ポリアクリル繊維、セルロース繊維、ポリビニル
アルコール繊維、ポリアミド繊維、パルプ、麻、木毛、
及び木片等が挙げられる。これらの中では経済性の点
で、金属繊維やビニロン繊維が好ましい。Examples of the inorganic fibrous substance include glass fiber, carbon fiber, rock wool, asbestos, ceramic fiber,
And metal fibers, etc., and as the organic fibrous substance, vinylon fiber, polyethylene fiber, polypropylene fiber, polyacryl fiber, cellulose fiber, polyvinyl alcohol fiber, polyamide fiber, pulp, hemp, wood wool,
And wood chips. Among these, metal fibers and vinylon fibers are preferable in terms of economy.
【００３４】繊維状物質の長さは圧送性や混合性等の点
で、５０ｍｍ以下が好ましく、３０ｍｍ以下がより好ま
しい。５０ｍｍを越えると圧送中にセメントコンクリー
トが閉塞するおそれがある。The length of the fibrous substance is preferably 50 mm or less, and more preferably 30 mm or less, in view of the pumpability and the mixing property. If it exceeds 50 mm, the cement concrete may be blocked during the pumping.
【００３５】繊維状物質の使用量は、セメントコンクリ
ート１００容量部中、０．５〜３容量部が好ましく、
０．７〜２容量部がより好ましい。０．５容量部未満で
は効果がなく、３容量部を越えると圧送性が低下した
り、効果がなくなったりするおそれがある。The amount of the fibrous substance used is preferably 0.5 to 3 parts by volume based on 100 parts by volume of cement concrete.
0.7-2 volume parts is more preferred. If the amount is less than 0.5 part by volume, there is no effect, and if the amount exceeds 3 parts by volume, there is a possibility that the pumpability is reduced or the effect is lost.
【００３６】本発明の吹付セメントコンクリートにおけ
る水の使用量は、強度発現性の点で、水／セメント比で
３５％以上が好ましく、４０〜６０％がより好ましい。
３５％未満だとセメントコンクリートが十分に混合でき
ず、６０％を越えると強度発現性が小さくなるおそれが
ある。The amount of water used in the sprayed cement concrete of the present invention is preferably 35% or more, more preferably 40 to 60%, in terms of water / cement from the viewpoint of strength development.
If it is less than 35%, the cement concrete cannot be sufficiently mixed, and if it exceeds 60%, the strength development may be reduced.
【００３７】本発明では、さらに骨材を使用することが
可能である。本発明で使用する骨材は吸水率が低くて、
骨材強度が高いものが好ましく、細骨材率や骨材の最大
寸法は吹付けできれば特に制限されるものではない。In the present invention, it is possible to further use an aggregate. The aggregate used in the present invention has a low water absorption,
A high aggregate strength is preferable, and the fine aggregate ratio and the maximum size of the aggregate are not particularly limited as long as they can be sprayed.
【００３８】細骨材としては、川砂、山砂、石灰砂、及
び珪砂等が使用でき、粗骨材としては、川砂利、山砂
利、及び石灰砂利等が使用できる。As fine aggregate, river sand, mountain sand, lime sand, silica sand and the like can be used, and as coarse aggregate, river gravel, mountain gravel, lime gravel and the like can be used.
【００３９】又、本発明では、シリカヒューム、微粉フ
ライアッシュ、ベントナイト、及びメタカオリン等の超
微粉を使用してもよい。In the present invention, ultrafine powder such as silica fume, fine powder fly ash, bentonite, and metakaolin may be used.
【００４０】本発明の吹付工法においては、従来使用の
吹付設備等が使用できる。In the spraying method of the present invention, conventional spraying equipment can be used.
【００４１】本発明の吹付工法としては、要求される物
性、経済性、及び施工性等に応じた種々の吹付工法が可
能である。As the spraying method of the present invention, various spraying methods according to required physical properties, economy, workability and the like are possible.
【００４２】本発明の吹付工法としては、乾式吹付工法
も施工できるが、粉塵量が多くなるおそれがあるので、
急結材を使用する前に予め水をセメントコンクリート側
に加えて混練りした湿式吹付工法を使用することが好ま
しい。As the spraying method of the present invention, a dry spraying method can be applied, but since the amount of dust may increase,
It is preferable to use a wet spraying method in which water is previously added to the cement concrete side and kneaded before using the quick setting material.
【００４３】湿式吹付工法としては、セメント、細骨
材、粗骨材、及び水を加えて混練し、空気圧送し、途中
にＹ字管を設け、その一方から急結材供給装置により急
結材を空気圧送し、合流混合して急結性湿式吹付コンク
リートとしたものを吹付ける方法が挙げられる。As a wet spraying method, cement, fine aggregate, coarse aggregate, and water are added and kneaded, and the mixture is kneaded and fed by air. There is a method in which the materials are pneumatically fed, mixed and mixed to form a quick-setting wet-sprayed concrete and sprayed.
【００４４】本発明の吹付工法においては、従来使用の
吹付設備等が使用できる。通常、吹付圧力は２〜５ｋｇ
／ｃｍ2 、吹付速度は４〜２０ｍ3 ／ｈである。In the spraying method of the present invention, conventional spraying equipment can be used. Normally, spray pressure is 2-5kg
/ Cm 2 , and the spraying speed is 4 to 20 m 3 / h.
【００４５】吹付設備は吹付が十分に行われれば、特に
限定されるものではなく、例えば、吹付セメントコンク
リートの圧送にはアリバー社商品名「アリバー２８０」
等が、急結材の圧送には急結材圧送装置「ナトムクリー
ト」等が、それぞれ使用できる。The spraying equipment is not particularly limited as long as the spraying is sufficiently performed. For example, for the spraying of sprayed cement concrete, the product name “Alibar 280” is available from Alibaba.
A quick-set material pumping device “Natom Cleat” or the like can be used for pumping the quick-set material.
【００４６】[0046]
【実施例】以下、実施例に基づき本発明を詳細に説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments.
【００４７】（実験例１）各材料の単位量を、セメント
４５０ｋｇ／ｍ3 、細骨材１００２ｋｇ／ｍ3 、粗骨材
６７１ｋｇ／ｍ3 、及び水２２５ｋｇ／ｍ3 とし、セメ
ント１００重量部に対して表１に示す量の増粘剤を混合
して吹付コンクリートを調製し、これをコンクリート圧
送機「アリバー２８０」により空気圧送した。吹付コン
クリートの空気圧送の途中に設けたＹ字管の一方より、
セメント１００重量部に対して急結材１０重量部と減水
剤０．３重量部を混合した急結材混合物を、急結材添加
装置「ナトムクリート」により吹付コンクリートに添加
して急結性吹付コンクリートを調製した。この急結性吹
付コンクリートについて評価した。結果を表１に示す。[0047] The unit amount of (Experimental Example 1) Each material, cement 450 kg / m 3, fine aggregates 1002kg / m 3, coarse aggregate 671kg / m 3, and the water 225 kg / m 3, to 100 parts by weight of cement On the other hand, a thickening agent in an amount shown in Table 1 was mixed to prepare a sprayed concrete, and this was air-pneumatically fed by a concrete pumping machine “Aliver 280”. From one of the Y-shaped pipes provided in the middle of pneumatic feeding of shotcrete,
A quick-setting material mixture obtained by mixing 10 parts by weight of quick-setting material and 0.3 parts by weight of a water reducing agent with respect to 100 parts by weight of cement is added to the sprayed concrete by a quick-setting material adding device "NATOM CLEAT", and quick-setting spraying is performed. Concrete was prepared. This quick setting sprayed concrete was evaluated. Table 1 shows the results.
【００４８】（使用材料） セメント：普通ポルトランドセメント、市販品、ブレー
ン値３２００ｃｍ2 ／ｇ、比重３．１６ 細骨材：新潟県青海産石灰砂、表面水率３．１％、比重
２．６４ 粗骨材：新潟県糸魚川市姫川産川砂利、表乾状態、比重
２．６５、最大骨材寸法１０ｍｍ 急結材Ａ：カルシウムアルミネート／石膏＝１／１（重
量比）からなる混合物。 但し、カルシウムアルミネートはＣ12Ａ7 組成に対応す
るもので、非晶質、ブレーン値６０５０ｃｍ2 ／ｇのも
のを使用し、石膏はＩＩ型無水石膏、ブレーン値６０５
０ｃｍ2 ／ｇのものを使用した。 減水剤ア：高性能減水剤、粉末品、β−ナフタレンスル
ホン酸ホルマリン縮合物、市販品 増粘剤ｉ：セルロース類、ヒドロキシルメチルセルロー
ス、市販品 増粘剤ii：ポリアクリレート類、市販品(Materials used) Cement: ordinary Portland cement, commercially available product, Blaine value 3200 cm 2 / g, specific gravity 3.16 Fine aggregate: lime sand from Aomi, Niigata Prefecture, surface water content 3.1%, specific gravity 2.64 Coarse aggregate: Gravel from Himekawa, Itoigawa city, Niigata prefecture, surface dry state, specific gravity 2.65, maximum aggregate size 10 mm Quick setting material A: Calcium aluminate / gypsum = 1/1 (weight ratio). However, calcium aluminate corresponding to the composition of C 12 A 7 was used, and an amorphous material having a Blaine value of 6050 cm 2 / g was used.
The thing of 0 cm 2 / g was used. Water reducer a: High performance water reducer, powdered product, β-naphthalenesulfonic acid formalin condensate, commercial product Thickener i: Cellulose, hydroxylmethylcellulose, commercial product Thickener ii: polyacrylates, commercial product
【００４９】（測定方法）リバウンド率：急結性吹付コ
ンクリート２００リットルを４ｍ3 ／ｈの吹付速度で高
さ３．５ｍ、幅２．５ｍの模擬トンネルに吹付けた。吹
付終了後、付着せずに落下した急結性吹付コンクリート
の量を測定し、（リバウンド率）＝（吹付けの際に模擬
トンネルに付着せずに落下した急結性吹付コンクリート
の重量）／（吹付に使用した急結性吹付コンクリート全
体の重量）×１００（％）の式より算出した。 圧縮強度：材齢１時間の圧縮強度は幅２５ｃｍ×長さ２
５ｃｍのプルアウト型枠に設置したピンを、プルアウト
型枠表面から急結性吹付コンクリートで被覆し、型枠の
裏側よりピンを引き抜き、その時の引き抜き強度を求
め、（圧縮強度）＝（引き抜き強度）×４／（せん断面
積）の式から圧縮強度を算出した。材齢１日以降の圧縮
強度は幅５０ｃｍ×長さ５０ｃｍ×厚さ２０ｃｍの型枠
に急結性吹付コンクリートを吹付け、採取した直径５ｃ
ｍ×長さ１０ｃｍの供試体を２０トン耐圧機で測定し、
圧縮強度を求めた。 ダレ：急結性吹付コンクリートを４ｍ3 ／ｈの吹付速度
で１０分間、鉄板でアーチ状に製作した高さ３．５ｍ、
幅２．５ｍの模擬トンネルに吹付けた後の状態を観察し
た。ダレが生じなかったものを◎とし、ダレが少し生じ
たものを○とし、ダレが多く生じたものを×とした。 圧送性：急結性吹付コンクリートを４ｍ3 ／ｈの吹付速
度、４ｋｇ／ｃｍ2 の吐出圧力で、１０分間圧送管を用
いて吹付け、圧送管内の圧力を測定した。圧送管内の圧
力が４．０〜５．５ｋｇ／ｃｍ2 である場合を◎、圧送
管内が閉塞しやすくなる６．０ｋｇ／ｃｍ2 以上になっ
ても、圧送管に衝撃を与えることにより４．０〜５．５
ｋｇ／ｃｍ2 になる場合を○、圧送管が閉塞し、圧送管
に衝撃を与えても４．０〜５．５ｋｇ／ｃｍ2 とならな
い場合を×とした。(Measurement method) Rebound rate: 200 liters of quick setting sprayed concrete was sprayed onto a simulated tunnel having a height of 3.5 m and a width of 2.5 m at a blowing speed of 4 m 3 / h. After spraying, measure the amount of quick-setting spray concrete that fell without adhering, and (rebound rate) = (weight of quick-setting spray concrete that did not adhere to the simulated tunnel during spraying) / It was calculated from the formula of (weight of quick-setting sprayed concrete used for spraying) x 100 (%). Compressive strength: Compressive strength for one hour of age is 25 cm width x 2 length
A pin placed on a 5 cm pull-out mold is covered with quick-setting sprayable concrete from the surface of the pull-out mold, and the pin is pulled out from the back side of the form, and the pull-out strength at that time is obtained. (Compression strength) = (pull-out strength) The compressive strength was calculated from the formula of × 4 / (shear area). The compressive strength after the age of 1 day is sprayed with quick-setting concrete on a 50cm wide x 50cm long x 20cm thick formwork, and the diameter of the sample is 5c.
mx 10cm length of a specimen was measured with a 20-ton pressure machine,
The compressive strength was determined. Drip: Rapid-casting sprayed concrete was sprayed at a spraying speed of 4 m 3 / h for 10 minutes, and was 3.5 m high made of an iron plate in an arch shape.
The state after spraying on a 2.5 m-wide simulated tunnel was observed. ◎ indicates that no dripping occurred, ○ indicates that slight dripping occurred, and x indicates that dripping occurred a lot. Pumpability: Quick-setting sprayed concrete was sprayed at a spraying speed of 4 m 3 / h at a discharge pressure of 4 kg / cm 2 using a pressure pipe for 10 minutes, and the pressure in the pressure pipe was measured. In the case where the pressure in the pressure feeding pipe is 4.0 to 5.5 kg / cm 2 , even when the pressure in the pressure feeding pipe becomes 6.0 kg / cm 2 or more, the pressure in the pressure feeding pipe is increased. 0-5.5
The case where the pressure / pressure was reduced to 4.0 kg / cm 2 and the case where the pressure / pressure did not reach 4.0 to 5.5 kg / cm 2 even when an impact was applied to the pressure / feed tube was rated as x.
【００５０】[0050]
【表１】 [Table 1]
【００５１】実験例２ セメント１００重量部に対して増粘剤ｉ０．０５重量部
を混合して吹付コンクリートを調製し、セメント１００
重量部に対して急結材１０重量部と表２に示す量の減水
剤を混合した急結材混合物を吹付コンクリートに添加し
て急結性吹付コンクリートを調製し、スランプ、リバウ
ンド率、粉塵量、及び圧縮強度を評価したこと以外は、
実験例１と同様に行った。結果を表２に示す。Experimental Example 2 Shotcrete was prepared by mixing 0.05 part by weight of a thickener i with 100 parts by weight of cement.
A quick setting mixture prepared by adding 10 parts by weight of a quick setting material to a weight part and a water reducing agent in an amount shown in Table 2 was added to shot concrete to prepare a quick setting shot concrete, and a slump, a rebound rate, and a dust amount were prepared. , And except that the compressive strength was evaluated,
Performed in the same manner as in Experimental Example 1. Table 2 shows the results.
【００５２】（使用材料） 高性能減水剤イ：液体品、市販ポリカルボン酸系高分子
化合物(Materials used) High-performance water reducing agent A: liquid product, commercially available polycarboxylic acid polymer compound
【００５３】（評価方法） 粉塵量：急結性吹付コンクリートを４ｍ3 ／ｈの吹付速
度で１０分間、鉄板でアーチ状に製作した高さ３．５
ｍ、幅２．５ｍのシートで出入り口を閉鎖した模擬トン
ネル内で吹付けた。１分毎に吹付場所より３ｍの定位置
でデジタル粉塵計で粉塵量を測定し、得られた測定値の
平均値を示した。 スランプ：吹付コンクリートのスランプを測定した。Ｊ
ＩＳ Ａ １１０１に準じた。(Evaluation method) Dust amount: Rapid-setting sprayed concrete was sprayed at a spraying speed of 4 m 3 / h for 10 minutes, and was made into an arch shape with an iron plate at a height of 3.5.
m, a sheet with a width of 2.5 m was sprayed in a simulated tunnel whose entrance was closed. Every minute, the amount of dust was measured by a digital dust meter at a fixed position 3 m from the spraying place, and the average value of the measured values was shown. Slump: Slump of shotcrete was measured. J
According to IS A 1101.
【００５４】[0054]
【表２】 [Table 2]
【００５５】実験例３ セメント１００重量部に対して増粘剤ｉ０．０５重量部
を混合して吹付コンクリートを調製し、セメント１００
重量部に対して表３に示す量の急結材と減水剤０．３重
量部を混合した急結材混合物を吹付コンクリートに添加
して急結性吹付コンクリートを調製し、圧送性、凝結時
間、及び圧縮強度を評価したこと以外は、実験例１と同
様に行った。結果を表３に示す。Experimental Example 3 Shotcrete was prepared by mixing 0.05 parts by weight of a thickener i with 100 parts by weight of cement.
A quick-setting mixture obtained by mixing a quick-setting material in an amount shown in Table 3 with 0.3 parts by weight of a water reducing agent with respect to parts by weight is added to shotcrete to prepare a quick-setting sprayable concrete. , And the same procedure as in Experimental Example 1 except that the compressive strength was evaluated. Table 3 shows the results.
【００５６】（使用材料） 急結材Ｂ：カルシウムアルミネート、Ｃ12Ａ7 組成に対
応するもので、非晶質、ブレーン値６０５０ｃｍ2 ／ｇ(Material used) Quick-setting material B: Calcium aluminate, corresponding to the composition of C 12 A 7 , amorphous, having a Blaine value of 6050 cm 2 / g
【００５７】（測定方法） 凝結時間：吹付コンクリート中の粗骨材を除いた材料で
モルタルを練り、土木学会基準「吹付けコンクリート用
急結剤品質規格（ＪＳＣＥＤ−１０２）」に準拠して測
定した。(Measurement method) Setting time: Knead mortar with a material excluding coarse aggregates in shotcrete, and measure according to the Japan Society of Civil Engineers standard “Quicksetting agent quality standard for shotcrete (JSCED-102)”. did.
【００５８】[0058]
【表３】 [Table 3]
【００５９】実験例４ セメント１００重量部に対して増粘剤ｉ０．０５重量
部、及び、セメントコンクリート１００容量部中表４に
示す量の繊維状物質を混合して吹付コンクリートを調製
し、セメント１００重量部に急結材１０重量部と減水剤
０．３重量部を混合した急結材混合物を吹付コンクリー
トに添加して急結性吹付コンクリートを調製し、圧送
性、リバウンド率、及び曲げ強度を評価したこと以外
は、実験例１と同様に行った。結果を表４に示す。Experimental Example 4 Shotcrete was prepared by mixing 0.05 parts by weight of thickener i and 100 parts by weight of cement concrete with fibrous substances in the amount shown in Table 4 with 100 parts by weight of cement. 100 parts by weight of a quick setting material mixed with 10 parts by weight of a quick setting material and 0.3 parts by weight of a water reducing agent are added to a shot concrete to prepare a quick setting shot concrete, and the pumpability, rebound rate, and flexural strength are prepared. Was performed in the same manner as in Experimental Example 1 except that Table 4 shows the results.
【００６０】（使用材料） 繊維状物質Ｉ：スチール繊維、繊維長30ｍｍ、市販品 繊維状物質II：ビニロン繊維、繊維長30ｍｍ、市販品(Materials used) Fibrous substance I: steel fiber, fiber length 30 mm, commercially available fibrous substance II: vinylon fiber, fiber length 30 mm, commercially available product
【００６１】（評価方法） 繊維リバウンド率：繊維のリバウンド率を示した。急結
性吹付コンクリートを２００リットルの側壁に吹付けた
時の、（跳ね返った繊維の量）／（吹付に使用した急結
性吹付コンクリート中の繊維の量）×１００（％）で示
した。なお、跳ね返った繊維状物質Ｉの量は、跳ね返っ
た急結性吹付コンクリートから繊維を磁石により吸引、
収集し、繊維状物質Ｉに付着したセメントを洗い流し、
乾燥した後に測定した。跳ね返った繊維状物質IIの量は
硝酸ソーダの飽和溶液に跳ね返った急結性吹付コンクリ
ートを入れ、比重差で浮き上がった繊維状物質を拾い上
げてセメントを洗い流し、乾燥した後に測定した。 曲げ強度：土木学会基準「鋼繊維補強コンクリートの曲
げ試験方法（ＪＳＣＥ−Ｇ ５５２−１９９８３）」に
準じて材齢２８日の曲げ強度を測定した。(Evaluation method) Fiber rebound rate: The fiber rebound rate was shown. When the quick-setting sprayed concrete was sprayed on a 200-liter side wall, the value was expressed by (amount of rebound fiber) / (amount of fiber in quick-setting spray concrete used for spraying) × 100 (%). The amount of the rebounded fibrous substance I was determined by sucking fibers from the rebounded quick-setting sprayed concrete with a magnet.
Collecting and washing off the cement adhering to fibrous substance I,
It was measured after drying. The amount of the rebounded fibrous substance II was measured after putting the rebounded quick-setting spray concrete into a saturated solution of sodium nitrate, picking up the fibrous substance that floated up due to the difference in specific gravity, washing away the cement, and drying. Flexural strength: The flexural strength of a 28-year-old member was measured according to the Japan Society of Civil Engineers standard “Bending test method for steel fiber reinforced concrete (JSCE-G 552-19983)”.
【００６２】[0062]
【表４】 [Table 4]
【００６３】実験例５ セメント１００重量部に対して減水剤０．３重量部、及
び、セメントコンクリート１００容量部中繊維Ｉ１容量
部を混合して吹付コンクリートを調製し、セメント１０
０重量部に対して急結材１０重量部と増粘剤ｉ０．０５
重量部を混合した急結材混合物を吹付コンクリートに添
加して急結性吹付コンクリートを調製し、リバウンド
率、粉塵量、及び脈動性を評価したこと以外は、実験例
１と同様に行った。結果を表５に示す。Experimental Example 5 Shotcrete was prepared by mixing 0.3 parts by weight of a water reducing agent with 100 parts by weight of cement and 1 part by volume of fiber I in 100 parts by weight of cement concrete.
0 parts by weight, 10 parts by weight of quick setting material and thickener i0.05
The same procedure as in Experimental Example 1 was carried out, except that the quick-setting material mixture in which parts by weight were mixed was added to the shotcrete to prepare a quick-setting shotcrete, and the rebound rate, the amount of dust, and the pulsation were evaluated. Table 5 shows the results.
【００６４】（評価方法） 脈動性：急結性吹付コンクリートの圧送中のホースの脈
動状況を評価した。圧送ホースが脈動しない場合を◎、
脈動は発生したが圧送ホースが閉塞しない場合を○、脈
動が激しく圧送ホースが閉塞した場合を×とした。(Evaluation Method) Pulsation: Quick-setting The pulsation state of the hose during pressurization of the sprayed concrete was evaluated. ◎, when the pumping hose does not pulsate
The case where pulsation occurred but the pumping hose was not clogged was evaluated as ○, and the case where pulsation was severe and the pumping hose was clogged was evaluated as x.
【００６５】[0065]
【表５】 [Table 5]
【００６６】実験例６ セメント１００重量部に対して減水剤０．３重量部、増
粘剤ｉ０．０５重量部及び、セメントコンクリート１０
０容量部中繊維Ｉ１容量部を予め混合して吹付コンクリ
ートを調製し、セメント１００重量部に対して急結材１
０重量部を吹付コンクリートに添加して急結性吹付コン
クリートを調製したこと以外は、実験例５と同様に行っ
た。結果を表５に示す。Experimental Example 6 0.3 part by weight of a water reducing agent, 0.05 part by weight of a thickener i and 10 parts by weight of cement
0 parts by volume of fiber I1 part by volume is mixed in advance to prepare a shotcrete, and 100 parts by weight of cement is rapidly bonded to 1 part by weight.
The experiment was performed in the same manner as in Experimental Example 5 except that 0 parts by weight was added to the shotcrete to prepare a quick-setting shotcrete. Table 5 shows the results.
【００６７】実験例７ セメントコンクリート１００容量部中繊維Ｉ１容量部を
混合して吹付コンクリートを調製し、セメント１００重
量部に対して急結材１０重量部、減水剤０．３重量部、
及び増粘剤ｉ０．０５重量部を混合した急結材混合物を
吹付コンクリートに添加して急結性吹付コンクリートを
調製したこと以外は、実験例５と同様に行った。結果を
表５に示す。Experimental Example 7 Sprayed concrete was prepared by mixing 1 part by volume of fiber in 100 parts by weight of cement concrete, and 10 parts by weight of a quick-setting material, 0.3 part by weight of a water reducing agent, and 100 parts by weight of cement.
The same procedure as in Experimental Example 5 was carried out except that a quick-setting mixture containing 0.05 parts by weight of a thickener i was added to the shotcrete to prepare a quick-setting sprayable concrete. Table 5 shows the results.
【００６８】[0068]
【発明の効果】減水剤と増粘剤を、セメントコンクリー
ト側と急結材側の別々に配合することにより、吹付時に
発生するリバウンドや粉塵を低減でき、更には急結材の
添加率を低減することができる。According to the present invention, by combining the water reducing agent and the thickener separately on the cement concrete side and the quick setting material side, rebound and dust generated at the time of spraying can be reduced, and the addition rate of the quick setting material can be reduced. can do.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） //(Ｃ０４Ｂ 28/02 24:38 24:20） 103:30 103:44 (72)発明者 岩崎 昌浩 新潟県西頸城郡青海町大字青海2209番地 電気化学工業株式会社青海工場内 (72)発明者 渡辺 晃 新潟県西頸城郡青海町大字青海2209番地 電気化学工業株式会社青海工場内 Ｆターム(参考） 2D055 AA01 AA02 AA04 DB00 KA08 4D075 AA01 AE21 DA13 DA27 DA31 DB11 DB12 DC05 EB01 EC07 EC33 4G012 PA15 PA16 PA17 PA19 PA20 PA24 PB14 PB24 PB26 PB34 PB40 PC03 PC08 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) // (C04B 28/02 24:38 24:20) 103: 30 103: 44 (72) Inventor Masahiro Iwasaki 2209 Aomi, Aomi-machi, Nishikubiki-gun, Niigata Prefecture Inside the Aomi Plant of Denki Kagaku Kogyo Co., Ltd. (72) Akira Watanabe 2209, Aomi, Aomi-cho, Nishikubiki-gun, Niigata Prefecture F-term in the Aomi Plant of Denki Kagaku Kogyo Co., Ltd. 2D055 AA01 AA02 AA04 DB00 KA08 4D075 AA01 AE21 DA13 DA27 DA31 DB11 DB12 DC05 EB01 EC07 EC33 4G012 PA15 PA16 PA17 PA19 PA20 PA24 PB14 PB24 PB26 PB34 PB40 PC03 PC08
Claims (7)
ト側と急結材側の別々に配合してなり、セメントコンク
リートと急結材とを含有してなる吹付材料。1. A spraying material comprising a water reducing agent and a thickening agent separately compounded on the cement concrete side and the quick setting material side, and comprising cement concrete and the quick setting material.
ートと、減水剤と急結材を含有してなる急結材混合物と
を含有してなる吹付材料。2. A spraying material comprising cement concrete mixed with a thickener, and a quick-setting mixture containing a water reducing agent and a quick-setting material.
ートと、増粘剤を含有してなる急結材混合物とを含有し
てなる吹付材料。3. A spray material comprising a cement concrete obtained by mixing a water reducing agent and a quick-setting mixture containing a thickener.
ン縮合物である請求項１〜３のうちの１項記載の吹付材
料。4. The spray material according to claim 1, wherein the water reducing agent is a formalin condensate of naphthalenesulfonic acid.
４のうちの１項記載の吹付材料。5. The method according to claim 1, wherein the thickener is a cellulose.
5. The spray material according to one of the four items.
項１〜５のうちの１項記載の吹付材料。6. The spray material according to claim 1, further comprising a fibrous substance.
してなる吹付材料であって、減水剤と増粘剤とを、セメ
ントコンクリート側と急結材側の別々に配合した後に混
合してなることを特徴とする吹付工法。7. A spraying material containing cement concrete and a quick-setting material, wherein a water reducing agent and a thickening agent are separately mixed on the cement concrete side and the quick-setting material side and then mixed. A spraying method characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25021898A JP4253377B2 (en) | 1998-09-04 | 1998-09-04 | Spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25021898A JP4253377B2 (en) | 1998-09-04 | 1998-09-04 | Spraying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000072514A true JP2000072514A (en) | 2000-03-07 |
| JP4253377B2 JP4253377B2 (en) | 2009-04-08 |
Family
ID=17204598
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25021898A Expired - Lifetime JP4253377B2 (en) | 1998-09-04 | 1998-09-04 | Spraying method |
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| Country | Link |
|---|---|
| JP (1) | JP4253377B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001261417A (en) * | 2000-03-23 | 2001-09-26 | Denki Kagaku Kogyo Kk | Spraying material and construction method for spraying the same |
| JP2001294470A (en) * | 2000-04-10 | 2001-10-23 | Denki Kagaku Kogyo Kk | Spraying material and spraying method using the same |
| JP2001335350A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and spraying method using the same |
| JP2001335351A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and spraying method using the same |
| JP2001335352A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and its spraying method |
| JP2001335353A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and its spraying method |
| JP2002121061A (en) * | 2000-10-13 | 2002-04-23 | Denki Kagaku Kogyo Kk | Spraying method using spray material |
| JP2006282414A (en) * | 2005-03-31 | 2006-10-19 | Nof Corp | Strength improving agent for cement, aqueous solution of polycarboxylic acid-based copolymer, and cement composition |
-
1998
- 1998-09-04 JP JP25021898A patent/JP4253377B2/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001261417A (en) * | 2000-03-23 | 2001-09-26 | Denki Kagaku Kogyo Kk | Spraying material and construction method for spraying the same |
| JP2001294470A (en) * | 2000-04-10 | 2001-10-23 | Denki Kagaku Kogyo Kk | Spraying material and spraying method using the same |
| JP4519269B2 (en) * | 2000-05-25 | 2010-08-04 | 電気化学工業株式会社 | Spraying material and spraying method using the same |
| JP2001335351A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and spraying method using the same |
| JP2001335352A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and its spraying method |
| JP2001335353A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and its spraying method |
| JP2001335350A (en) * | 2000-05-25 | 2001-12-04 | Denki Kagaku Kogyo Kk | Spraying material and spraying method using the same |
| JP4519268B2 (en) * | 2000-05-25 | 2010-08-04 | 電気化学工業株式会社 | Spraying material and spraying method using the same |
| JP4519267B2 (en) * | 2000-05-25 | 2010-08-04 | 電気化学工業株式会社 | Spraying material and spraying method using the same |
| JP4519270B2 (en) * | 2000-05-25 | 2010-08-04 | 電気化学工業株式会社 | Spraying material and spraying method using the same |
| JP2002121061A (en) * | 2000-10-13 | 2002-04-23 | Denki Kagaku Kogyo Kk | Spraying method using spray material |
| JP4488613B2 (en) * | 2000-10-13 | 2010-06-23 | 電気化学工業株式会社 | Spraying method using spraying material |
| JP2006282414A (en) * | 2005-03-31 | 2006-10-19 | Nof Corp | Strength improving agent for cement, aqueous solution of polycarboxylic acid-based copolymer, and cement composition |
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