JP2006027995A - Method for improving surface appearance of concrete - Google Patents

Method for improving surface appearance of concrete Download PDF

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JP2006027995A
JP2006027995A JP2004235670A JP2004235670A JP2006027995A JP 2006027995 A JP2006027995 A JP 2006027995A JP 2004235670 A JP2004235670 A JP 2004235670A JP 2004235670 A JP2004235670 A JP 2004235670A JP 2006027995 A JP2006027995 A JP 2006027995A
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concrete
improving
reducing agent
water reducing
surface aesthetics
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Masao Umemoto
雅夫 梅本
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    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/02—Alcohols; Phenols; Ethers
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide such a surface-improving agent by which the surface of concrete is made beautiful and the surface layer thereof is made dense when the agent is mixed with cement. <P>SOLUTION: Diol or triol is added to the surface-improving agent and the mixture is kneaded and is hardened and cured preferably while the pressure is exerted thereto, and thereby the concrete surface is made dense and the appearance is remarkably improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はコンクリート（セメントペースト、モルタル、コンクリート、プレキャストコンクリートなど、セメントを用いる全般）の表面の美観と表面改良剤に関する。  The present invention relates to a surface aesthetic and a surface improver of concrete (general using cement such as cement paste, mortar, concrete, precast concrete, etc.).

コンクリート表面が被覆されることなく露出した状態にある現場打ち放しコンクリートやコンクリート製品などは、外観上、表面の美観が要求される。一方、美観を要求されないコンクリートであっても、表面が緻密なコンクリートは表面美麗であるとともに、水や空気を透過しにくいため、耐久性に優れている。  On-site exposed concrete and concrete products that are exposed without being covered with a concrete surface are required to have a beautiful surface appearance. On the other hand, even concrete that does not require aesthetics, concrete with a fine surface is beautiful and has excellent durability because it hardly permeates water and air.

セメントに混ぜるとコンクリートの表面が美麗になるとともに、表層が緻密となるような表面改良剤を見い出す。また、そのセメントに混ぜる量は十分に少量で効果を発揮するものでなければならない。  When it is mixed with cement, the surface of the concrete becomes beautiful and the surface layer is found to be dense. Also, the amount mixed with the cement must be sufficiently small to be effective.

本発明者は、ジオールまたはトリオールを加えて練り混ぜ、硬化養生させることにより、コンクリート表面が緻密となり、美観を著しく向上せしめることを見出し、本発明を完成するに至った。  The present inventor has found that by adding diol or triol, kneading and curing, the concrete surface becomes dense and the aesthetics are remarkably improved, and the present invention has been completed.

すなわち、本発明は、エチレングリコールに代表されるジオールまたは、グリセリンに代表されるトリオールを混和してコンクリートの表面美観を改良する方法を提供するものである。これらは、セメントに対し１％混ぜるだけでも効果を発揮する。  That is, the present invention provides a method for improving the surface aesthetics of concrete by mixing a diol typified by ethylene glycol or a triol typified by glycerin. These can be effective by mixing only 1% with cement.

本発明のセメントの表面改良剤をセメント組成物の練り混ぜ時に使用する場合、その添加量はセメント重量に対して固形分換算で０．１以上〜１．２％以下の範囲でなければならない。０．１％に満たなければ効果は小さく、１．２％を越えると、流動性を減少させたり、コンクリートの硬化時間が極めて長くなったり、ブリーディングが極めて大きくなったりして、実用性がなくなる。  When using the cement surface improver of the present invention at the time of kneading the cement composition, the amount added should be in the range of 0.1 to 1.2% in terms of solid content with respect to the cement weight. If less than 0.1%, the effect is small, and if it exceeds 1.2%, the fluidity is reduced, the curing time of the concrete becomes extremely long, and the bleeding becomes extremely large, so the practicality is lost. .

一般にコンクリートを一定の形にするには型枠に入れて硬化させる。その時に、表面が粗な枠を使用するとコンクリート表面は粗となる。そこで、滑らかな表面をしたプラスチックを枠に用いるとコンクリート表面は滑らかとなる。この現象は、本発明の方法によらなくとも、自明のところである。しかし、本発明の表面美観改良剤を加えて練り混ぜたコンクリートを、このような滑らかな表面をした型枠内で硬化させると、深みのある非常にきれいな表面をしたコンクリートが得られる。ここに、滑らかな面とは、プラスチック面、サミットモールド缶のように研磨した金属面、ウレタン塗装面、ガラス面、などをいう。木板は滑らか面ではないが、ニスを塗った面は滑らか面である。さらに、薬剤を１％程度に増やし、自重の２倍以上の圧力を加えれば表層が透明性を持つまでになる。このように、本発明の薬剤を加えて練り混ぜ、滑らかな接触面との間に応力を加えて養生させると、結晶化した表面になることがわかる。圧力を大きくして薬剤量を増すと結晶層は厚くなり、逆に、圧力を小さくして薬剤量を減らすと結晶層は薄くなる。  Generally, concrete is put into a mold and hardened in a certain shape. At that time, if a frame having a rough surface is used, the concrete surface becomes rough. Therefore, if plastic with a smooth surface is used for the frame, the concrete surface becomes smooth. This phenomenon is self-evident even if not according to the method of the present invention. However, when the concrete mixed with the surface aesthetics improving agent of the present invention is hardened in a mold having such a smooth surface, a concrete having a deep and very clean surface can be obtained. Here, the smooth surface means a plastic surface, a metal surface polished like a summit mold can, a urethane coating surface, a glass surface, and the like. The wood board is not a smooth surface, but the varnished surface is a smooth surface. Furthermore, if the drug is increased to about 1% and pressure more than twice its own weight is applied, the surface layer becomes transparent. Thus, it can be seen that when the agent of the present invention is added and kneaded and stress is applied between the smooth contact surface and cured, a crystallized surface is obtained. When the pressure is increased to increase the amount of drug, the crystal layer becomes thicker. Conversely, when the pressure is decreased to decrease the amount of drug, the crystal layer becomes thinner.

上部開放のプラスチック枠内に練り混ぜたコンクリートを入れ、自然圧で硬化養生させるとした場合、上部開放であるため水分は蒸発していくが、水を補給して、常に水にぬれた状態で養生すると、本発明の薬剤を混ぜたコンクリートでは，プラスチックとの接触表面が銀色に近い美しい色となる。この表面を削りとり、蛍光Ｘ線で分析した結果、薬剤を加えなかったものと比較してカルシウム分が、特に多くなっており、成分は水酸化カルシウムの結晶であると推定される。このように、本薬剤により、表面に水酸化カルシウム層が出来ており、もし、圧力を加えて養生すると極めて強固な厚い結晶層となり、透明性を持つまでになると考えられる。  If you put concrete mixed in an open plastic frame and cure it with natural pressure, moisture will evaporate because it is open at the top, but water is replenished and always wet. When cured, the concrete mixed with the agent of the present invention has a beautiful surface close to silver in contact with the plastic. As a result of scraping the surface and analyzing it with fluorescent X-rays, the calcium content is particularly increased compared to the case where no chemical was added, and the component is presumed to be calcium hydroxide crystals. In this way, the present drug forms a calcium hydroxide layer on the surface, and if it is cured by applying pressure, it becomes a very strong and thick crystal layer, which is considered to have transparency.

本発明のコンクリートの表面美観改良剤は、減水剤、ＡＥ減水剤に含有させることも可能である。減水剤に含有させる場合は、合計量１に対し改良剤０．１〜０．５（減水剤＋改良剤＝１）の範囲内が好ましい。平均分子量が３０００以下であることが好ましい。これをこえると、減水剤の性能が維持できる改良剤の添加量が少なくなり、０．１以下としなければならなくなる。０．１以下では美観効果は期待できない。さて、この混合減水剤をセメント量に対し１．２％を加えたとすると、改良剤は実際には０．１〜０．６％加えられたことになる。  The surface aesthetics improving agent for concrete of the present invention can be contained in a water reducing agent or an AE water reducing agent. When it is contained in the water reducing agent, it is preferably within the range of 0.1 to 0.5 improver (water reducing agent + improving agent = 1) with respect to the total amount of 1. The average molecular weight is preferably 3000 or less. Beyond this, the amount of improver that can maintain the performance of the water reducing agent is reduced, and must be 0.1 or less. If it is 0.1 or less, an aesthetic effect cannot be expected. Assuming that 1.2% of the mixed water reducing agent is added to the cement amount, the improving agent is actually added in an amount of 0.1 to 0.6%.

減水剤としては、リグニンスルホン酸塩、オキシカルボン酸塩、ポリアルキルスルホン酸塩、ポリカルボン酸塩、ナフタレンスルホン酸ホルマリン縮合物塩、メラミンスルホン酸ホルマリン縮合物塩、アミノスルホン酸塩、ポリサッカライド誘導体を例示することができる。上記のオキシカルボン酸塩としては、グルコン酸塩、クエン酸塩およびグルカル酸塩を、また、ポリカルボン酸塩としては、アリールエーテルとマレイン酸ハーフエステルとの共重合体およびその塩、スチレンとマレイン酸ハーフエステルとの共重合体およびその塩、（メタ）アクリル酸塩と（メタ）アクリレートとの共重合体およびその塩を、例示することができる。  Water reducing agents include lignin sulfonate, oxycarboxylate, polyalkyl sulfonate, polycarboxylate, naphthalene sulfonic acid formalin condensate salt, melamine sulfonic acid formalin condensate salt, amino sulfonate, polysaccharide derivative Can be illustrated. Examples of the oxycarboxylate include gluconate, citrate, and glucarate, and examples of the polycarboxylate include a copolymer of aryl ether and maleic acid half ester and a salt thereof, styrene and maleate. Examples thereof include a copolymer with an acid half ester and a salt thereof, and a copolymer with a (meth) acrylate and (meth) acrylate and a salt thereof.

また、改良剤を含めた減水剤の使用量は、セメント組成物中のセメント重量に対して固形分換算で０．５〜３重量％であることが好ましい。改良剤を０．２含む減水剤をセメント量の０．５％を用いた場合、改良剤は０．１％、２％を用いた場合の改良剤は０．４％となる。改良剤を０．４含む減水剤をセメント量の０．５％用いた場合、改良剤は０．２％、減水剤を２％を用いた場合、改良剤は０．８％となる。このように、減水剤と改良剤の比には制約があり、かつ、セメントに加えることのできる改良剤の範囲（０．１〜１％）が決められており、さらに、混合減水剤の好ましい使用量も定まっている。  Moreover, it is preferable that the usage-amount of the water reducing agent including an improving agent is 0.5 to 3 weight% in conversion of solid content with respect to the cement weight in a cement composition. When 0.5% of the amount of cement is used as the water reducing agent containing 0.2 of the improving agent, the improving agent is 0.1%, and when the 2% is used, the improving agent is 0.4%. When 0.5% of the amount of cement used is 0.4% of the water reducing agent containing the improving agent, the improving agent is 0.2%, and when 2% of the water reducing agent is used, the improving agent is 0.8%. As described above, the ratio between the water reducing agent and the improving agent is limited, and the range of the improving agent that can be added to the cement (0.1 to 1%) is determined. The amount used is also fixed.

本発明のセメント成形品の表面・美観改良剤は、通常、セメント組成物の練り混ぜ時に使用するものであるが、セメント組成物を打設・成形する型枠の表面に被覆して使用することも有効である。この場合、表面の薬剤濃度は高濃度となり、コンクリート全体に混ぜるよりも少量で効果が得られる。  The surface / aesthetic appearance improving agent for cement molded products of the present invention is usually used when kneading the cement composition, but it should be used by coating the surface of the formwork for placing and molding the cement composition. Is also effective. In this case, the chemical concentration on the surface becomes high, and the effect can be obtained with a smaller amount than when mixed with the whole concrete.

以下に、本発明のセメント成形品の表面美観改良剤をコンクリートに使用した場合の実施例を示すが、本発明はこれらの実施例によって限定されるものではない。  Although the Example at the time of using the surface appearance improvement agent of the cement molded product of this invention for concrete below is shown, this invention is not limited by these Examples.

ポリエチレングリコール（平均分子量２００）、トリエチレングリコール、エチレングリコール、グリセリンのいずれか０．４とり、減水剤（リグニンスルホン酸系）０．６を混合したものを、セメントに対し１．５％を添加して水を加えて練り混ぜた。なお細骨材はセメントに対し１対１の割合で加えた。目標スランプ１８ｃｍ、目標空気量４％のセメントペーストを得（これをＡ）、別に、減水剤のみで目標スランプ１８ｃｍ、空気量４％の比較対照セメントペーストを作り（これをＢ）、また減水剤も加えない基準ペーストも作った（これをＣ）。（なお、スランプ、フローおよび空気量が目標の範囲となるように、減水剤および空気量調整剤で調整した）それぞれサミットモールド缶（５ｃｍ×９．５ｃｍ）に入れ、フタをして、１ヶ月間養生した。取り出し、表面の美観を観察した。その結果、改良剤を加えたものは、表面が滑らかであり、表面にある目視でわかる気泡は、Ａが３８個、Ｂが５５個、Ｃが６２個であった。  Add 0.4% of polyethylene glycol (average molecular weight 200), triethylene glycol, ethylene glycol, or glycerin and mix with 0.6 water reducing agent (lignin sulfonic acid) 1.5% to cement Then add water and knead. Fine aggregate was added at a ratio of 1: 1 to cement. A cement paste with a target slump of 18 cm and a target air amount of 4% is obtained (this is A). Separately, a comparative cement paste with a target slump of 18 cm and air amount of 4% is made only with a water reducing agent (this is B). A reference paste was also made (C). (Adjusted with water reducing agent and air amount adjusting agent so that slump, flow and air amount are within the target range) Put each in a summit mold can (5cm x 9.5cm), cover and 1 month It was cured for a while. Removed and observed the aesthetics of the surface. As a result, the surface to which the improving agent was added had a smooth surface, and the number of visually recognized bubbles on the surface was 38 for A, 55 for B, and 62 for C.

実施例１のＡ、Ｂ、Ｃについて透水試験を行った。透水試験は、２００μｌの水を同一面積面上に置き、吸収される時間を測定した。その結果、Ｃ、Ｂ、Ａの順で透水性が大であった。  A water permeability test was conducted on A, B, and C of Example 1. In the water permeability test, 200 μl of water was placed on the same area surface, and the time taken for absorption was measured. As a result, the water permeability was large in the order of C, B, and A.

ポリエチレングリコール（平均分子量２００）、トリエチレングリコール、グリセリンをセメントに対し１％を添加し、水及び細骨材を加えて（水／セメント比５０％、セメントと細骨材１対１）練り混ぜた。別に、オキシカルボン酸系ＡＥ減水剤１％を加えたもの、さらにＡＥ減水剤を加えないものも練り混ぜた。これらを、ポリエチレン製容器（厚み５ｃｍ、高さ１５ｃｍ、幅１０ｃｍ）に入れてフタをした。フタはコンクリート面に密着し、フタの上に重りをのせ、圧力がセメントペーストに加わるようにした。自重の３倍の重しを置いて一ヶ月養生した。養生においてはそれぞれの改良剤につき、重しを載せた場合と載せない場合について観察した。表面美観改良剤を加えたものは、表面のごく薄い層は透明であり、光を反射するほどの美麗感があった。  Add 1% of polyethylene glycol (average molecular weight 200), triethylene glycol and glycerin to cement, add water and fine aggregate (water / cement ratio 50%, cement and fine aggregate 1: 1) and mix. It was. Separately, an oxycarboxylic acid-based AE water reducing agent 1% added and an AE water reducing agent not added were kneaded. These were put in a polyethylene container (thickness 5 cm, height 15 cm, width 10 cm) and capped. The lid adhered to the concrete surface and a weight was placed on the lid so that pressure was applied to the cement paste. It was cured for one month with a weight 3 times its own weight. In the curing, each improving agent was observed with and without a weight. When the surface aesthetics improver was added, the very thin layer on the surface was transparent, and it was so beautiful that it reflected light.

トリエチレングリコールをセメントに対し０．３、０．６、１％添加し、水／セメント比５０％、細骨材のセメント比１対１にて練り混ぜたもの約１００ｇをとり、ポリスチレン製円柱容器（上部開放）に入れて一ヶ月間養生を行った。この間、上面が乾燥しないように常に水を加えた。一ヵ月後取り出し表面を観察した。その結果、０．３、０．６、１％すべて銀色に輝く表面となっていた。トリエチレングリコールを加えないものはコンクリート色であった。  Add about 0.3, 0.6, 1% of triethylene glycol to cement, mix with water / cement ratio 50%, fine aggregate cement ratio 1: 1. Curing was carried out for one month in a container (open top). During this time, water was always added so that the upper surface did not dry. One month later, the surface was taken out and observed. As a result, the surfaces were 0.3, 0.6, and 1% all shining silver. What added no triethylene glycol was a concrete color.

テトラエチレングリコールをポリカルボン酸系高性能ＡＥ減水剤に加えたものＡ（重量比で１：４）を、セメント重量に対し１．２％加え、水セメント比４５％、細骨材とセメントの割合１対１で練り混ぜ、別に、ポリカルボン酸系高性能ＡＥ減水剤のみ加えたものをＢ、何も加えないものをＣとする３種について、上部開放の容器に入れ、乾燥しないように水を過剰に補給しつつ一ヵ月養生した。取り出して表面を比較したところ、Ａは表面がチョークのように白く美しかった。ＢはＡほどではないがややチョークのように白くなっていた。Ｃは、全くセメント色であった。Ａ，Ｂ，Ｃについて、表面層約０．２５ｍｍ厚を削り取り、振動法により均一粒径の粉体を取り出し、蛍光Ｘ線により成分組成（Ｃａ／Ｓｉ比）を測定した。その結果、Ａのカルシウム量が最も多く３００、Ｂは２４１、Ｃは２０６ｋｃｐｓであった。このことから、本発明の改良剤を加えたものは表面にＣａが多く、従って、Ｃａ（ＯＨ）２の結晶層があり、表面を緻密にしていると考えられる。Add tetraethylene glycol to polycarboxylic acid-based high-performance AE water reducing agent A (1: 4 by weight) to 1.2% of cement weight, water cement ratio 45%, fine aggregate and cement Mix in a one-to-one ratio, and separately add the polycarboxylic acid-based high-performance AE water-reducing agent only to B, and add nothing to C. He was cured for one month while supplying excessive water. When the surface was taken out and compared, A was white and beautiful like chalk. B was not as white as A, but was slightly white like chalk. C was completely cement color. About A, B, and C, a surface layer of about 0.25 mm thickness was scraped, a powder having a uniform particle diameter was taken out by a vibration method, and a component composition (Ca / Si ratio) was measured by fluorescent X-rays. As a result, the amount of calcium of A was 300, B was 241, and C was 206 kcps. From this, it can be considered that the material to which the improving agent of the present invention is added has a large amount of Ca on the surface, and therefore there is a crystal layer of Ca (OH) 2 and the surface is made dense.

リグニンスルホン酸系ＡＥ減水剤０．６にポリエチレングリコール（平均分子量６００）０．４加えて混ぜた混合減水剤をセメント重量に対し、１．５％加え、水セメント比５０％細骨材とセメント比１対１で練り混ぜたものをＡ、別にＡＥ減水剤のみ１．５％加えて、水セメント比５０％で練り混ぜたものＢ，減水剤を加えず水セメント比５０％で練り混ぜたものＣを、それぞれサミットモールド缶中で２ヶ月養生した後取り出した。Ａ、Ｂ、Ｃ、について、表面層をカッターナイフで均一厚みに削り取り、得られた粉体から振動法にて均一粒径を取り出し、蛍光Ｘ線分析した。その結果、ＡのＣａは１５１、Ｂは１３３、Ｃは１４０ｋｃｐｓであった。よって、これも改良剤を加えた場合、表層のカルシウム量が多く、美観と緻密さに寄与していると考えられる。  Add 1.5% of mixed water reducing agent mixed with 0.4 of polyethylene glycol (average molecular weight 600) to lignin sulfonic acid AE water reducing agent 0.6, 50% water cement ratio fine aggregate and cement Mix A with a ratio of 1: 1, add 1.5% AE water reducing agent only, and mix with 50% water cement ratio B, mix with 50% water cement ratio without adding water reducing agent The thing C was taken out after curing for 2 months in each summit mold can. About A, B, and C, the surface layer was shaved to a uniform thickness with a cutter knife, and the uniform particle diameter was taken out from the obtained powder by a vibration method, and subjected to fluorescent X-ray analysis. As a result, Ca of A was 151, B was 133, and C was 140 kcps. Therefore, it is considered that when an improving agent is added, the amount of calcium in the surface layer is large, contributing to aesthetics and fineness.

変性リグニンスルホン酸系減水剤に、テトラエチレングリコールを加えた。総重量１に対し、０．６のテトラエチレングリコールを加えた減水剤が、ＪＩＳＡ６２０４〔コンクリート用化学混和剤〕の規格を満たすか否かを調べたところ、ブリーディングと、凍結融解項目が不適となった。次に、０．４５に減少させた場合、全ての項目をクリアーした。このことから、０．５以下である必要がある。また、ポリカルボン酸系高性能減水剤を用いた実験では、０．４と０．３の比較テストから０．３以下である必要があった。  Tetraethylene glycol was added to the modified lignin sulfonic acid water reducing agent. It was examined whether the water reducing agent added with tetraethylene glycol 0.6 with respect to the total weight 1 satisfies the standard of JIS A6204 [Chemical Admixture for Concrete]. It was. Next, when it was reduced to 0.45, all items were cleared. From this, it is necessary to be 0.5 or less. Further, in an experiment using a polycarboxylic acid-based high-performance water reducing agent, it was necessary to be 0.3 or less from a comparative test of 0.4 and 0.3.

実施例７について、マレイン酸共重合物系高性能減水剤を用いた場合、同じ結果（白く美しい）が得られた。  About Example 7, the same result (white and beautiful) was obtained when the maleic acid copolymer type high performance water reducing agent was used.

Claims (10)

ジオール、又はトリオールからなる薬剤を添加して練り混ぜた後、硬化養生させるコンクリートの表面美観改良方法。  A method for improving the surface aesthetics of concrete that is cured and cured after adding a diol or triol chemical and kneading. ジオールが、アルキレングリコールである請求項１記載のコンクリートの表面美観改良方法。  The method for improving the surface aesthetics of concrete according to claim 1, wherein the diol is alkylene glycol. トリオールが、グリセリンである請求項１記載のコンクリートの表面美観改良方法。  The method for improving the surface aesthetics of concrete according to claim 1, wherein the triol is glycerin. 請求項１ないし３記載のコンクリート表面美観改良法において、薬剤がセメント重量に対し０．１〜１％以下であるコンクリートの表面美観改良方法。  The method for improving the surface aesthetics of concrete according to any one of claims 1 to 3, wherein the chemical is 0.1 to 1% or less based on the cement weight. 請求項１ないし４記載のコンクリートの表面美観改良方法において、練り混ぜたコンクリートをなめらかな面に密着させ、圧力を加えた状態で硬化養生させるコンクリートの表面美観改良方法。  5. The method for improving the surface aesthetics of concrete according to claim 1, wherein the concrete is mixed and brought into close contact with a smooth surface and cured and cured under pressure. 蒸発水分を補給しながら養生させる請求項１ないし５記載のコンクリートの表面美観改良方法。  The method for improving the surface aesthetics of concrete according to claims 1 to 5, wherein the concrete is cured while being replenished with evaporated water. 請求項１ないし３記載の薬剤を含有してなるコンクリートの表面美観改良用の減水剤。  A water reducing agent for improving the surface aesthetics of concrete, comprising the agent according to any one of claims 1 to 3. 含有する薬剤の平均分子量が３０００以下である請求項７記載のコンクリートの表面美観改良用の減水剤。  The average molecular weight of the chemical | medical agent to contain is 3000 or less, The water reducing agent for the surface aesthetics improvement of the concrete of Claim 7. 減水剤中の薬剤の含有量が重量比率で１０以上５０％以下の範囲内にある請求項７又は８記載のコンクリートの表面美観改良用の減水剤。  The water reducing agent for improving the surface aesthetics of concrete according to claim 7 or 8, wherein the content of the chemical in the water reducing agent is in the range of 10 to 50% by weight. 減水剤の主成分がリグニンスルホン酸塩、オキシカルボン酸塩、ポリアルキルスルホン酸塩、ポリカルボン酸塩、ナフタレンスルホン酸ホルマリン縮合物塩、メラニンスルホン酸ホルマリン縮合物塩、アミノスルホン酸塩、ポリサッカライド誘導体の中から選ばれた１種または２種以上であることを特徴とする、請求項７ないし９記載のコンクリートの表面美観改良用の減水剤。  The main component of water reducing agent is lignin sulfonate, oxycarboxylate, polyalkyl sulfonate, polycarboxylate, naphthalene sulfonic acid formalin condensate salt, melanin sulfonic acid formalin condensate salt, amino sulfonate, polysaccharide The water reducing agent for improving the surface aesthetics of concrete according to any one of claims 7 to 9, wherein the water reducing agent is one or more selected from derivatives.
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JP2007269611A (en) * 2006-03-31 2007-10-18 Sumitomo Osaka Cement Co Ltd Method for suppressing color skip or mottling of cement hardened body
JP2008280214A (en) * 2007-05-11 2008-11-20 Kao Corp Method for producing cement-based solidifying material
WO2009119893A1 (en) * 2008-03-26 2009-10-01 花王株式会社 Additive composition for hydraulic compositions
JP2009298663A (en) * 2008-06-16 2009-12-24 Kao Corp Additive composition for hydraulic composition
WO2010062155A1 (en) * 2008-11-28 2010-06-03 Arturo Solis Herrera Cement mixture with significantly improved physico-chemical and bacteriological properties that contains dopamelanin, precursors thereof, analogues thereof or derivatives thereof, as an additive
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JP2007269611A (en) * 2006-03-31 2007-10-18 Sumitomo Osaka Cement Co Ltd Method for suppressing color skip or mottling of cement hardened body
JP2008280214A (en) * 2007-05-11 2008-11-20 Kao Corp Method for producing cement-based solidifying material
WO2009119893A1 (en) * 2008-03-26 2009-10-01 花王株式会社 Additive composition for hydraulic compositions
JP2009256202A (en) * 2008-03-26 2009-11-05 Kao Corp Additive composition for hydraulic compositions
US20110021668A1 (en) * 2008-03-26 2011-01-27 Kao Corporation Additive composition for hydraulic composition
US8519028B2 (en) 2008-03-26 2013-08-27 Kao Corporation Early strengthening agent for hydraulic composition
US8604103B2 (en) 2008-03-26 2013-12-10 Kao Corporation Additive composition for hydraulic composition
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JP2009298663A (en) * 2008-06-16 2009-12-24 Kao Corp Additive composition for hydraulic composition
WO2010062155A1 (en) * 2008-11-28 2010-06-03 Arturo Solis Herrera Cement mixture with significantly improved physico-chemical and bacteriological properties that contains dopamelanin, precursors thereof, analogues thereof or derivatives thereof, as an additive
US8691891B2 (en) 2008-11-28 2014-04-08 Arturo Solis Herrera Cement mixture with significantly improved physicochemical and bacteriological properties that contains dopamelanin, precursors thereof, analogues thereof or derivatives thereof, as an additive
EA021885B1 (en) * 2008-11-28 2015-09-30 Артуро Солис Эррера Cement mixture with significantly improved physico-chemical and bacteriological properties that contains dopa-melanin as an additive

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