JPS60221354A - Cement admixture - Google Patents

Cement admixture

Info

Publication number
JPS60221354A
JPS60221354A JP7500884A JP7500884A JPS60221354A JP S60221354 A JPS60221354 A JP S60221354A JP 7500884 A JP7500884 A JP 7500884A JP 7500884 A JP7500884 A JP 7500884A JP S60221354 A JPS60221354 A JP S60221354A
Authority
JP
Japan
Prior art keywords
concrete
admixture
performance water
water reducing
reducing agent
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
Application number
JP7500884A
Other languages
Japanese (ja)
Inventor
勇 佐々木
松井　二三雄
鴨居　徳俊
幡野　隆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Denko KK filed Critical Showa Denko KK
Priority to JP7500884A priority Critical patent/JPS60221354A/en
Publication of JPS60221354A publication Critical patent/JPS60221354A/en
Pending legal-status Critical Current

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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10—Coating or impregnating
    • C04B20/1018—Coating or impregnating with organic materials
    • C04B20/1022—Non-macromolecular compounds
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明はセメント又はセメント配合物の混和剤に関する
ものであり、更に詳しくはコンクリートに使用する高性
能減水剤並びにスランプロス防止剤に関するものである
。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an admixture for cement or cement mixtures, and more particularly to a high performance water reducing agent and a slump loss inhibitor for use in concrete. .

（従来技術） 近苑、コンクリートの紹惠強庁什及び流動化コンクリー
トが注目をあびそれぞれコンクリート分野において比類
ない地位を固めつつある。これらの新しいコンクリート
技術の基盤となっているのが高性能減水剤である。(Prior art) Concrete, Shaohuiqiang Office Building and Fluidized Concrete are attracting attention and each is solidifying its unique position in the concrete field. The basis of these new concrete technologies is high performance water reducers.

高性能減水剤は化学混和剤の一種であるが従来の混和剤
とは成分が違い、その減水機能も高く、一方凝結遅延作
用や空気連行性がほとんどない特徴を有している。従っ
て従来の減水剤よりも高い混入率で使用できるため、２
０〜３０チの混練水の減水も可能となる。A high performance water reducing agent is a type of chemical admixture, but its composition is different from that of conventional admixtures, and it has a high water reducing function, while having almost no setting retardation effect or air entrainment. Therefore, it can be used at a higher mixing rate than conventional water reducing agents, so 2
It is also possible to reduce the amount of kneading water by 0 to 30 inches.

しかしながらこの優れた高性能減水剤もいくつかの欠点
を持っていることが認識されてきている。However, it has been recognized that this superior superplasticizer also has some drawbacks.

その最大の問題点は流動化コンクリートに適用した場合
のコンシスチンシーの経時変化、いわゆるスランプロス
が大きいことである。The biggest problem is that when applied to fluidized concrete, there is a large change in consistency over time, so-called slump loss.

このため我が国ではコンクリート使用現場において高性
能減水剤をコンクリートに添加し攪拌混合して流動化コ
ンクリートを得ているのが実情であるがこの事は、その
都度現場捷でコンクリート技術者が出むいてコンクリー
トの品質管理を行う必要があシ、膨大な人件費を要する
と共に現場における流動化コンクリート製造の際し、生
コン車の駐車スペースやその発生する騒音、排ガスの間
１題まで抱えこむ事になり、その早急な対策が切望され
てきた。For this reason, in Japan, high-performance water reducing agents are added to concrete and mixed with stirring to obtain fluidized concrete at the site where concrete is used. It is necessary to control the quality of concrete, which requires a huge amount of labor costs, and when producing fluidized concrete on site, there are problems such as the parking space for ready-mixed concrete trucks, the noise generated by it, and the exhaust gas. , there has been an urgent need for immediate countermeasures.

スランプロスの防止対策の一つに高性能減水剤を塊粒状
の固形分として添加しそのもつ徐々に溶解する性質を利
用する方法があり、***ＳＫＷ社では既に実用化されて
いるようであるが、乾燥コスト、造粒コストを含めると
極めて割高な混和剤にならざるを得ない。別のスランプ
ロス防止対策の一つに高性能減水剤をコンクリートに繰
り返し添加する方法も提唱されているが作業は煩雑であ
９実用性には乏しい。また別のスランプロス防止対策の
一つに遅延剤の併用による方法もあるが、流動化コンク
リートに必要な可使時間約９０分の要求に十分対応でき
ない場合が多く、またコンクリート性能に及ぼす影響が
甚大であるだめ添加量の管理には過度の神経を使わねば
ならず、実際的とは云えない。One of the measures to prevent slump loss is to add a high-performance water reducing agent in the form of solid lumps and take advantage of its gradual dissolution property, which seems to have already been put into practical use by the German company SKW. If drying costs and granulation costs are included, the admixture will inevitably be extremely expensive. Another proposed method for preventing slump loss is to repeatedly add a high-performance water reducer to concrete, but this method is complicated and is not practical. Another method to prevent slump loss is to use a retarder in combination, but this is often not sufficient to meet the pot life of about 90 minutes required for fluidized concrete, and it also has a negative impact on concrete performance. This is a huge problem, and excessive care must be taken to control the amount added, which is not practical.

（発明が解決しようとする問題点） 本発明者らはこのような技術の現状に鑑み、生コンプラ
ントにおいて高性能減水剤を添加して流動化コンクリー
トが製造でき、約９０公租度の現場までの運搬時間中に
スランプロスによる流動性の低下を防止し一定の流動性
を保持しうるような高性能減水剤について鋭意検討を進
め、その結果本発明に到達するに到った。(Problems to be Solved by the Invention) In view of the current state of technology, the present inventors have discovered that fluidized concrete can be produced by adding a high-performance water reducing agent in a ready-mixed concrete plant, and that it can be applied to sites with approximately 90 public lots. We have conducted extensive research into a high-performance water reducing agent that can prevent fluidity from decreasing due to slump loss during transportation and maintain a constant fluidity, and as a result, we have arrived at the present invention.

（問題点を解決するだめの手段） 本発明は多孔性無機質材料の粉粒体がもつ内部空孔中に
加圧せしめて高性能減水剤水溶液を充填し乾燥せしめた
ことを特徴とするセメント混和剤である。(Another Means to Solve the Problems) The present invention provides a cement mixture characterized in that an aqueous solution of a high-performance water reducer is filled under pressure into the internal pores of a porous inorganic material powder and dried. It is a drug.

本発明のもう一つの特徴はこの高性能減水剤が水溶性メ
ラミンホルムアルデヒド樹脂スルホン酸塩及び／または
水溶性ナフタリンスルホン酸ホルムアルデヒド縮合物塩
であることに、ある。Another feature of the present invention is that the high performance water reducer is a water-soluble melamine formaldehyde resin sulfonate and/or a water-soluble naphthalene sulfonic acid formaldehyde condensate salt.

本発明に用いられる多孔性無機質材料としては次のよう
なものが例示される。各地で産出される火山れき、人工
軽量骨材、真珠岩、黒曜石、松脂岩等を膨張させたいわ
ゆる・や−ライト、シラスバルーン、シリカバルーン、
膨張ヒル石、雲母、ゼオライト、各種粘土鉱物の粉粒体
、フライアッシュ、クリンカー等の各種鉱滓。Examples of porous inorganic materials used in the present invention include the following. So-called Ya-lite, Shirasu balloon, Silica balloon, made by expanding volcanic rubble produced in various places, artificial lightweight aggregate, pearlite, obsidian, pine rock, etc.
Various slags such as expanded vermiculite, mica, zeolite, various clay mineral powders, fly ash, and clinker.

本発明に用いられ、多孔性無機質材料の有する内部空孔
は加圧下においては本来の連通孔として働らく事が必要
であシ、好旧バは常圧下における高性能減水剤水溶液の
該内部空孔中への充填量より前記加圧下におけるそれが
大きく上回るような多孔性無機質材料、即ち常圧下にお
いては、独立空孔的にふるまい加圧下においてはじめて
本来の連通空孔になシ内部空孔に高性能減水剤を充填し
うるような空孔構造を有するものが最適である。It is necessary for the internal pores of the porous inorganic material used in the present invention to function as original communicating pores under pressure. In a porous inorganic material in which the amount of filling into the pores under pressure is much greater than that under pressure, in other words, under normal pressure, the pores behave like independent pores, and only under pressure become internal pores instead of the original communicating pores. The most suitable material is one with a pore structure that can be filled with a high-performance water reducing agent.

この種の空孔構造は松脂岩や黒曜石のパーライト、シラ
スバルーン、一部の人工軽量骨材、数種の天然火山レキ
等上記の各種のものに見られる。This type of pore structure is found in the various materials mentioned above, such as rosinite, obsidian pearlite, shirasu balloons, some artificial lightweight aggregates, and some types of natural volcanic rock.

本発明に用いられる多孔性無機質材料はその添加によシ
、セメントの硬化反応を著しく阻害するようなものであ
ってはならない。The porous inorganic material used in the present invention must not be such that its addition significantly inhibits the hardening reaction of cement.

本発明で行う加圧操作時の圧力はｏ２〜１ｏψ２程度の
圧力で充分でアシ、上限はたかだか用いる多孔性無機質
材料の空孔構造が本来的に連通化する程度に止め、構造
全体が破壊されない範囲に止める事が重要である。本発
明においては１０ｋｇ／ｃｒｎ２を越えることは好まし
くない。まだ加圧が０．２に９／ｃｍ以下では、高性能
減水剤が短時間で放出されてしまうような空孔にだけし
か充填されず従って、含有量も少ないので多量の多孔性
無機質材料を使用することになシコンクリート性能に影
響を及ぼす。The pressure during the pressurization operation performed in the present invention is sufficient at a pressure of about o2 to 1oψ2, but the upper limit is at most the level at which the pore structure of the porous inorganic material used is naturally connected, so that the entire structure is not destroyed. It is important to stay within range. In the present invention, it is not preferable that the weight exceeds 10 kg/crn2. If the pressure is still below 0.2 to 9/cm, the high performance water reducing agent will only be filled in the pores where it will be released in a short time, and therefore the content will be small, so a large amount of porous inorganic material will be used. Its use will affect concrete performance.

本発明に係わるセメント混和剤によるスランプロス防止
、即ち流動性保持効果は多孔性無機質材料の粒径とその
空孔構造、及び高性能減水剤の含量によって決定される
。The effect of preventing slump loss, that is, maintaining fluidity, by the cement admixture according to the present invention is determined by the particle size of the porous inorganic material, its pore structure, and the content of the high performance water reducing agent.

本発明に使用する減水剤としてはメラミンホルムアルデ
ヒド樹脂スルホン酸塩および／まだはナフタリンスルホ
ン酸ホルムアルデヒド縮合物塩が減水性にすぐれ、空気
連行作用や凝結遅延作用がほとんどなくもっとも適切で
ある。またこれらに対してアルキルナフタリン、フェノ
ール、アンソラセン、キシレン、リグニン、クレオソー
ト油及びこれらのスルホン化物のような置換芳香族化合
物、或いはメラミン、尿素等のアミン化合物及びその誘
導体などと共縮合したものであってもよい。As the water reducing agent used in the present invention, melamine formaldehyde resin sulfonate and/or naphthalene sulfonic acid formaldehyde condensate salt are most suitable because they have excellent water reducing properties and have almost no air entrainment effect or setting retardation effect. In addition, these are co-condensed with substituted aromatic compounds such as alkylnaphthalene, phenol, anthracene, xylene, lignin, creosote oil and their sulfonated products, or amine compounds such as melamine and urea, and their derivatives. There may be.

水溶性塩を形成する陽イオンとしてはＮａ、Ｋ、ＮＨ４
、Ｃａなどの元素モノエタノールアミン、ジェタノール
アミン、トリエタノールアミンのアミンなどが挙げられ
る。Cations that form water-soluble salts include Na, K, and NH4.
, Ca, and other elemental monoethanolamines, jetanolamines, triethanolamines, and the like.

本発明の混和剤の乾燥処理は前記加圧操作を終えた後充
填されていない水溶液を充分にきシ、自然乾燥、減圧乾
燥、加熱乾燥等の方法で行うことができる。加熱乾燥に
際しては、３０〜３ｏｏ℃と広い範囲から任意の温度を
選択しうる。The drying treatment of the admixture of the present invention can be carried out by thoroughly draining the unfilled aqueous solution after completing the above-mentioned pressurizing operation, and performing natural drying, vacuum drying, heat drying, or the like. For heat drying, any temperature can be selected from a wide range of 30 to 30°C.

本発明の混和剤は上述のごとく外観上は粉粒体として扱
えるだめ、計量、投入等の操作は液体に比べて容易であ
り、またセメント等の粉体材料にプレミックスして用い
る事も可能である。As mentioned above, the admixture of the present invention can be handled as a powder or granule in appearance, and operations such as measuring and adding are easier than with a liquid, and it can also be used as a premix in powder materials such as cement. It is.

本発明の混和剤はまた多孔性無機質材料の粉粒体の内部
空孔中に含浸されない高性能減水剤の粉粒末と共存して
用いることも可能であシ、内部空孔中にないものは添加
初期のコンクリート流動性を高める上で、特に有効とな
る。この場合の混和剤の製造法としては加圧操作終了後
、水溶液部分を含んだまま乾燥処理を行うのが最も合理
的である。勿論、本発明の混和剤に別途高性能減水剤の
粉粒体を加えてもよく、この高性能減水剤が同種であっ
ても異種であってもかまわない。The admixture of the present invention can also be used in coexistence with a powder or granule of a high performance water reducing agent that is not impregnated into the internal pores of the porous inorganic material powder. is particularly effective in increasing concrete fluidity at the initial stage of addition. In this case, the most rational method for producing the admixture is to carry out a drying process while still containing the aqueous solution after the completion of the pressurizing operation. Of course, a powder or granular material of a high performance water reducing agent may be separately added to the admixture of the present invention, and it does not matter whether the high performance water reducing agents are of the same type or different types.

本発明のセメント混和剤は通常、セメントに対し高性能
減水剤水溶性塩純分換算で０１〜２重量％程度になる量
で使用されるが、その機能は初期のコンクリートの流動
性を高めることと、約９０分にわたって流動性を保持す
る事に分けられる。The cement admixture of the present invention is normally used in an amount of about 0.1 to 2% by weight in terms of high-performance water-reducing agent water-soluble salt purity based on cement, and its function is to improve the fluidity of initial concrete. and maintaining fluidity for about 90 minutes.

容易に堺解されるように最初の機能は通常の高性能減水
剤水溶液の方が効果が早く適切である。従って本発明の
セメント混和剤の使用の態様としては、液体の高性能減
水剤との併用という形式を採るのが実際的である。液状
部分は従来の減水剤を用いる事もその場合可能である。For the first function, an ordinary high performance water reducing agent aqueous solution is more effective and suitable for the first function because it is easily solved. Therefore, it is practical to use the cement admixture of the present invention in combination with a liquid high performance water reducer. It is also possible in that case to use conventional water reducing agents for the liquid part.

（作用） 本発明のセメント混和剤を用いることによシ、空孔内部
の高性能減水剤がコンクＩＪ　−ト中に徐々に放出され
、コンクリート製造後少なくとも９０分通常は９０〜１
２０分にわたシコンクリート製造時の高い流動性が保持
される。(Function) By using the cement admixture of the present invention, the high-performance water reducer inside the pores is gradually released into the concrete IJ-concrete, and the cement admixture is used for at least 90 minutes after concrete production.
High fluidity during the production of concrete is maintained for 20 minutes.

（実施例） 以下に本発明の実施例を挙げ本発明を更に詳しく説明す
る。(Example) The present invention will be described in more detail below with reference to Examples.

実施例１ 黒曜石パーライト（粒径０，６〜１．２ｍｍ：９２．４
重量係、単位容積重量０．２０９に’ｊ／ｌ　）　０．
６　ｋｇを粗い布製の袋に入れて封じ、内容積５１のオ
ートクレーブ内に入れこの上に液を入れたとき袋が浮き
上らぬようにおさえ金網を設置し、次いでメラミンホル
ムアルデヒド樹脂スルホン酸ナトリウム（商品名メルメ
ン）Ｌ−１０：昭和電工株式会社製品）の３０重量％水
溶液を金網の上部まで注入し、オートクレーブの蓋を閉
め、窒素がスぎンペと連結し、５ｋｇ／Ｃｒｎ２の窒素
圧力をかけて３０分間保持した。その後圧力を解除し、
中の袋を取り出し金網の）−ＩＦおいてを分に液をきり
５０℃で乾燥せしめた。このものはもとの７−、Ｏ−ラ
イト重量に対して１７チの高性能減水剤有効成分を含有
していた。Example 1 Obsidian pearlite (particle size 0.6-1.2 mm: 92.4
Weight section, unit volume weight 0.209'j/l) 0.
6 kg was placed in a coarse cloth bag, sealed, placed in an autoclave with an internal volume of 51 cm, and a wire mesh was placed on top to hold the bag so that it would not float up when the liquid was poured into it, and then melamine formaldehyde resin sodium sulfonate ( Pour a 30% by weight aqueous solution of L-10 (product name: Showa Denko K.K. product) to the top of the wire gauze, close the autoclave lid, connect nitrogen to Suginpe, and apply a nitrogen pressure of 5 kg/Crn2. and held for 30 minutes. Then release the pressure and
The inner bag was taken out, and the liquid was drained using a wire mesh ()-IF, and the bag was dried at 50°C. This contained 17 g of superplasticizer active ingredient based on the original 7-, O-lite weight.

比較例１ 圧力をかけないことを除けば実施例１と全く同様の処方
操作によシ、メラミンホルムアルデヒド９樹脂スルホン
酸ナトリウム水溶液を含有する黒曜石パーライトを得た
。このものはもとのＡ−ライト重量に対して２．４％の
高性能減水剤有効成分を含有していた。Comparative Example 1 Obsidian pearlite containing an aqueous solution of melamine formaldehyde 9 resin sodium sulfonate was obtained by the same recipe operation as in Example 1 except that no pressure was applied. This contained 2.4% superplasticizer active ingredient based on the original A-Lite weight.

実施例２ 天然軽量骨材（金沢産の流紋岩系天然ガラス、粒径０．
６〜１．２ｍｍ：９０．２チ、単位容積重量゛０．６８
２に９／ｌ　）　２　ｋｇを粗い布製の袋に入れて封じ
、内容積５１のオートクレーブ中に入れ、液を入れたと
き袋が浮き上らぬようにおさえ金網を設置し、次いでナ
フタリンスルホン酸ホルムアルデヒド縮合物のす）　Ｉ
Ｊウム塩（商品名マイティ、花王石鹸株式会社製品）の
４２重量％水溶液を金網の上部まで注入し、オートクレ
ーブの蓋を閉め、窒素ガスボンベと連結し、５ｋｇ／ｃ
ｒｎ２の窒素圧力をかけて３０分間保持した。その後圧
力を解除し中の袋を取シ出し、金網の上において充分に
液をきった。このものはもとの骨材に対して９．７重量
％の高性能減水剤有効成分を含有していた。Example 2 Natural lightweight aggregate (rhyolitic natural glass from Kanazawa, particle size 0.
6-1.2mm: 90.2 inches, unit volume weight ゛0.68
2 to 9/l) 2 kg was placed in a coarse cloth bag, sealed, placed in an autoclave with an internal volume of 51 cm, and a wire mesh was placed to hold the bag so that it would not float up when the liquid was added, and then naphthalene sulfonic acid was added. Formaldehyde condensate) I
Pour a 42% by weight aqueous solution of Jum salt (trade name Mighty, product of Kao Soap Co., Ltd.) up to the top of the wire gauze, close the lid of the autoclave, connect it to a nitrogen gas cylinder, and add 5 kg/c
A nitrogen pressure of rn2 was applied and held for 30 minutes. Thereafter, the pressure was released, the bag was taken out, and the bag was placed on a wire mesh to drain the liquid thoroughly. This contained 9.7% by weight of superplasticizer active ingredient based on the original aggregate.

比較例２ 圧力をかけないことを除けば実施例２と全く同様の処方
操作によりナフタリンスルホン酸ホルムアルデヒド縮合
物のナトリウム塩水溶液を含有する軽量骨材を得だこの
ものはもとの軽量骨材に対して６７重量％の高性能減水
剤有効成分を含有していた。Comparative Example 2 A lightweight aggregate containing an aqueous sodium salt solution of a naphthalene sulfonic acid formaldehyde condensate was obtained by the same recipe operation as in Example 2, except that no pressure was applied. It contained 67% by weight of the active ingredient of the high performance water reducer.

実施例３　コンクリート試験 （１）コンクリートの配合成分 配合成分 セメント：普通ポルトランドセメント３銘柄混合 細骨材：大井用産川砂、比重２．６１、粒径５叫以下 粗骨材：硬質砂岩砕石、比重２６４、粒径２０ｍｍ以下 混和剤：（第１表に示した） （２）コンクリートの混練方法及び試験方法線シ上シ量
が４０１となる様に配合成分を計量し、容量１００１の
可傾式ミキサーを用いて粗骨材、細骨材、セメント、水
、混和剤の順に同時に添加し連続して３分間練り混ぜス
ランプを測定した。ミキサーの回転数を４ｒｐｍにおと
し最長で９０分間アノテートした。Example 3 Concrete test (1) Mixed ingredients of concrete Mixed ingredients Cement: Ordinary Portland cement Mixed with 3 brands Fine aggregate: Ubukawa sand for Oi, specific gravity 2.61, particle size 5 or less Coarse aggregate: Hard sandstone crushed stone, specific gravity 264, admixture with particle size of 20 mm or less: (shown in Table 1) (2) Concrete mixing method and testing method Weigh the ingredients so that the amount on the line is 401, and use a tilting type with a capacity of 1001. Coarse aggregate, fine aggregate, cement, water, and admixture were simultaneously added in this order using a mixer, and the mixture was continuously kneaded for 3 minutes and the slump was measured. The rotation speed of the mixer was set to 4 rpm, and annotation was performed for a maximum of 90 minutes.

１５分毎にスランプを測定した。３０分で供試体を製作
し標準養生した。Slump was measured every 15 minutes. A specimen was prepared in 30 minutes and subjected to standard curing.

試験方法 スランプ：　ＪＩＳＡＩＩＯＩに準拠 圧縮強度；　ＪＩＳＡ１１３２及びＪＩＳＡ１１０８に
準拠（３）試験結果 本発明の混和剤及び比較例の混和剤等を用い度が向上す
るが一方、スランプロスが著しい。Test method Slump: Compliant with JISA IIOI Compressive strength: Compliant with JISA 1132 and JISA 1108 (3) Test results Although the admixture of the present invention and the admixture of the comparative example improved, the slump loss was significant.

しかし本発明の混和剤を用いると、スランプロスが著し
く改善され９０分後でも充分な流動性を保持しうろこと
がわかる。However, when the admixture of the present invention is used, the slump loss is significantly improved and sufficient fluidity is maintained even after 90 minutes.

Claims (2)

【特許請求の範囲】[Claims] （１）多孔性無機質材料の粉粒体の内部全孔中に高性能
減水剤水溶液を加圧下で充填し乾燥せしめたことを特徴
とするセメント用混和剤(1) A cement admixture characterized by filling all internal pores of a porous inorganic material powder with a high-performance water reducing agent aqueous solution under pressure and drying the mixture. （２）高性能減水剤が水溶性メラミンホルムアルデヒド
樹脂スルホン酸塩及び／または水溶性ナフタリンスルホ
ン酸ホルムアルデヒド縮合物塩でちることを特徴とする
第１項記載のセメント用混和剤(2) The admixture for cement according to item 1, wherein the high performance water reducing agent is made of a water-soluble melamine formaldehyde resin sulfonate and/or a water-soluble naphthalene sulfonic acid formaldehyde condensate salt.
JP7500884A 1984-04-16 1984-04-16 Cement admixture Pending JPS60221354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7500884A JPS60221354A (en) 1984-04-16 1984-04-16 Cement admixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7500884A JPS60221354A (en) 1984-04-16 1984-04-16 Cement admixture

Publications (1)

Publication Number Publication Date
JPS60221354A true JPS60221354A (en) 1985-11-06

Family

ID=13563733

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7500884A Pending JPS60221354A (en) 1984-04-16 1984-04-16 Cement admixture

Country Status (1)

Country Link
JP (1) JPS60221354A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280358A (en) * 1988-09-14 1990-03-20 Denki Kagaku Kogyo Kk Cement admixture
EP1632461A1 (en) * 2004-09-06 2006-03-08 Sika Technology AG Method for preparation of a coated basic component for hydraulic compositions, coated basic component for concrete production, admixture for concrete production and method for preparation of a hydraulic composition
WO2006027363A1 (en) * 2004-09-06 2006-03-16 Sika Technology Ag Method for producing a coated basic material for a hydraulic composition, coated basic material for a hydraulic composition, additive for a hydraulic composition and method for producing a hydraulic composition
JP2006232651A (en) * 2005-02-22 2006-09-07 Matsumoto Yushi Seiyaku Co Ltd Admixture for extrusion molding of cement and extrusion molded cement product
JP2013538143A (en) * 2010-08-24 2013-10-10 オムヤ・デイベロツプメント・アー・ゲー Cement, mortar, method of preparing a concrete composition containing a calcium carbonate-based filler (pre-) treated with a superplasticizer, the resulting composition and cement product and their applications

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280358A (en) * 1988-09-14 1990-03-20 Denki Kagaku Kogyo Kk Cement admixture
EP1632461A1 (en) * 2004-09-06 2006-03-08 Sika Technology AG Method for preparation of a coated basic component for hydraulic compositions, coated basic component for concrete production, admixture for concrete production and method for preparation of a hydraulic composition
WO2006027363A1 (en) * 2004-09-06 2006-03-16 Sika Technology Ag Method for producing a coated basic material for a hydraulic composition, coated basic material for a hydraulic composition, additive for a hydraulic composition and method for producing a hydraulic composition
US8481116B2 (en) 2004-09-06 2013-07-09 Sika Technology Ag Method for producing a coated basic material for a hydraulic composition, coated basic material for a hydraulic composition, additive for a hydraulic composition and method for producing a hydraulic composition
JP2006232651A (en) * 2005-02-22 2006-09-07 Matsumoto Yushi Seiyaku Co Ltd Admixture for extrusion molding of cement and extrusion molded cement product
JP2013538143A (en) * 2010-08-24 2013-10-10 オムヤ・デイベロツプメント・アー・ゲー Cement, mortar, method of preparing a concrete composition containing a calcium carbonate-based filler (pre-) treated with a superplasticizer, the resulting composition and cement product and their applications

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