JP2009161377A - Admixture for high-strength cement composition and high-strength cement composition using the same - Google Patents

Admixture for high-strength cement composition and high-strength cement composition using the same Download PDF

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JP2009161377A
JP2009161377A JP2007340466A JP2007340466A JP2009161377A JP 2009161377 A JP2009161377 A JP 2009161377A JP 2007340466 A JP2007340466 A JP 2007340466A JP 2007340466 A JP2007340466 A JP 2007340466A JP 2009161377 A JP2009161377 A JP 2009161377A
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cement composition
admixture
strength cement
strength
gypsum
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JP4999179B2 (en
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Yoshihisa Hanei
誉久 羽根井
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Taiheiyo Materials Corp
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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high value-added product obtained by using waste gypsum as a raw material, namely, an admixture for a high-strength cement composition and to provide the high-strength cement composition obtained by using waste gypsum as the raw material. <P>SOLUTION: Specific II-type anhydrous gypsum is incorporated as the admixture for the high-strength cement composition, namely, the admixture for the high-strength cement composition includes the II-type anhydrous gypsum which is obtained by heat-treating waste gypsum such as waste gypsum boards and has ≥8,000 cm<SP>2</SP>/g Blaine specific surface area. The high-strength cement composition includes the admixture for the high-strength cement composition and cement. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、高強度セメント組成物用混和材に関し、詳しくは、石膏廃材から得た無水石膏を原材料として有効利用した高強度セメント組成物用混和材に関する。また、本発明は、高強度セメント組成物に関し、詳しくは、石膏廃材を有効再利用した高強度セメント組成物用混和材を用いた高強度セメント組成物に関する。   The present invention relates to an admixture for high-strength cement composition, and more particularly to an admixture for high-strength cement composition that effectively uses anhydrous gypsum obtained from gypsum waste as a raw material. The present invention also relates to a high-strength cement composition, and more particularly to a high-strength cement composition using an admixture for high-strength cement composition that effectively reuses gypsum waste.

石膏ボードは、防火性・防音性に優れ、温度・湿度による伸び縮みが少なく、施工が容易であること等から、天井や壁等の内装材として広く使用されている。このため、建築物の建て替えが進むと大量に石膏ボードの廃材（廃石膏ボード）が発生する。また、模型作成や義歯作製等の型材として石膏が使用され、ここで使用された石膏も廃棄物として廃棄処分されている。このような石膏廃材をセメントや石膏等にリサイクルすることを可能とする処理方法が提案されている（例えば特許文献１参照）。しかし、リサイクル処理には一般的に多大なコストを要すため、より高付加価値の製品として利用できる技術が望まれていた。
特開２００４−７３９７６号公報 Gypsum board is widely used as an interior material for ceilings and walls because it is excellent in fireproofing and soundproofing, has little expansion and contraction due to temperature and humidity, and is easy to construct. For this reason, a large amount of gypsum board waste material (waste gypsum board) is generated as the rebuilding of the building proceeds. In addition, gypsum is used as a mold material for making a model or a denture, and the gypsum used here is discarded as waste. A processing method has been proposed that makes it possible to recycle such gypsum waste into cement, gypsum, and the like (see, for example, Patent Document 1). However, since the recycling process generally requires a large amount of cost, a technology that can be used as a product with higher added value has been desired.
JP 2004-73976 A

本発明は、石膏廃材のリサイクル技術について、従来の上記問題を解決したものであり、石膏廃材を原材料とした高付加価値な製品、即ち高強度セメント組成物用混和材を提供することを目的とする。また、本発明は、石膏廃材を原材料とした高強度セメント組成物を提供することを目的とする。   The present invention solves the above-mentioned conventional problems with respect to the recycling technology of gypsum waste, and an object thereof is to provide a high-value-added product using gypsum waste as a raw material, that is, an admixture for high-strength cement composition. To do. Another object of the present invention is to provide a high-strength cement composition using gypsum waste as a raw material.

本発明は、特定のII型無水石膏として含有させることによって上記問題を解決した。即ち、本発明は、以下の（１）〜（３）で表す高強度セメント組成物用混和材および（４）で表す高強度セメント組成物である。
（１）石膏廃材を加熱処理してなるブレーン比表面積で８０００ｃｍ２／ｇ以上のII型無水石膏を含有することを特徴とする高強度セメント組成物用混和材。
（２）更に、シリカ質微粉末を含有する上記(１)に記載する高強度セメント組成物用混和材。
（３）上記のII型無水石膏１００質量部に対し、シリカ質微粉末を３０〜４００質量部、スラグ粉末を５〜２０質量部、保水剤を０．１〜２質量部含有する上記(１)または上記(２)に記載する高強度セメント組成物用混和材。
（４）上記(１)〜上記(３)の何れかに記載する高強度セメント組成物用混和材を用いた高強度セメント組成物。 The present invention has solved the above problems by containing it as a specific type II anhydrous gypsum. That is, the present invention is an admixture for high-strength cement composition represented by the following (1) to (3) and a high-strength cement composition represented by (4).
(1) A high-strength cement composition admixture characterized by containing II-type anhydrous gypsum having a specific surface area of 8000 cm 2 / g of heat-treated gypsum waste material.
(2) The admixture for high-strength cement composition according to (1), further comprising siliceous fine powder.
(3) The above-mentioned (1) containing 30 to 400 parts by mass of siliceous fine powder, 5 to 20 parts by mass of slag powder, and 0.1 to 2 parts by mass of a water retention agent with respect to 100 parts by mass of type II anhydrous gypsum. ) Or the admixture for high-strength cement composition described in (2) above.
(4) A high-strength cement composition using the admixture for high-strength cement composition described in any one of (1) to (3) above.

本発明によれば、石膏廃材を原材料とした高付加価値な製品、即ち高強度セメント組成物用混和材が得られる。また、本発明によれば、石膏廃材を原材料とした高強度セメント組成物が得られる。本発明により得られる高強度セメント組成物は、加熱養生することにより、１００Ｎ／ｍｍ２以上の高強度となる。本発明によれば、１００Ｎ／ｍｍ２以上の高強度の、ヒューム管やボックスカルバート等のセメント製品が得られる。 ADVANTAGE OF THE INVENTION According to this invention, the high added value product which used the gypsum waste material as a raw material, ie, the high-strength cement composition admixture, is obtained. Moreover, according to this invention, the high-strength cement composition which used the gypsum waste material as a raw material is obtained. The high-strength cement composition obtained by the present invention has a high strength of 100 N / mm 2 or more by heat curing. According to the present invention, a cement product such as a fume tube or a box culvert having a high strength of 100 N / mm 2 or more can be obtained.

また、本発明によれば、石膏廃材を原材料とした高付加価値な製品が得られるので、石膏廃材のリサイクルが促進される。   In addition, according to the present invention, a high-value-added product using gypsum waste as a raw material can be obtained, so that recycling of gypsum waste is promoted.

本発明の高強度セメント組成物用混和材は、廃石膏ボード等の石膏廃材を加熱処理してなるブレーン比表面積で８０００ｃｍ２／ｇ以上のII型無水石膏を含有することを特徴とする高強度セメント組成物用混和材である。用いる石膏廃材としては、廃石膏ボード、又は模型作成や義歯作製等の型材として使用された石膏が使用でき、まとめて多くの石膏廃材が得られることから、廃石膏ボードが好適である。用いる廃石膏ボードとしては、その発生源は特に限定されない。例えば、建築物の建て替えにより発生するもの、新設の建設現場で成形により発生するもの、又は製造工場で不良品とされたもの等が挙げられる。 The admixture for high-strength cement composition of the present invention contains type II anhydrous gypsum having a brain specific surface area of 8000 cm 2 / g or more obtained by heat-treating gypsum waste such as waste gypsum board. It is an admixture for a cement composition. As the gypsum waste material to be used, waste gypsum board or gypsum used as a mold material for model creation or denture production can be used, and a large amount of gypsum waste material can be obtained collectively, and therefore, waste gypsum board is suitable. As a waste gypsum board to be used, the generation source is not specifically limited. For example, those generated by rebuilding of a building, those generated by molding at a new construction site, or defective products at a manufacturing factory can be cited.

本発明において、石膏廃材を加熱処理する方法・装置は、石膏廃材中の石膏成分である二水石膏がII型無水石膏に分解される温度になる方法・装置であれば特に限定されない。石膏廃材からII型無水石膏を得る方法としては、石膏廃材を破砕または粉砕した後に、３５０℃以上の温度に加熱し、粉末を得ることが好ましい。石膏廃材を破砕または粉砕せずに焼成を行なうと、石膏廃材中に含まれる水分や紙成分等が残存し易い。加熱処理する方法・装置としては、例えば、キルンにより焼成する方法、サイクロンを用いて熱風と熱交換する方法などが挙げられる。   In the present invention, the method and apparatus for heat-treating the gypsum waste material is not particularly limited as long as it is a method and apparatus that achieves a temperature at which dihydrate gypsum as a gypsum component in the gypsum waste material is decomposed into type II anhydrous gypsum. As a method for obtaining type II anhydrous gypsum from gypsum waste, it is preferable to crush or crush gypsum waste and then heat it to a temperature of 350 ° C. or higher to obtain powder. When the gypsum waste material is baked without being crushed or crushed, moisture, paper components, and the like contained in the gypsum waste material tend to remain. Examples of the heat treatment method and apparatus include a method of baking with a kiln and a method of heat exchange with hot air using a cyclone.

また、本発明に使用するII型無水石膏の粉末度は、より少ない石膏の使用量で高強度が得られることから、ブレーン比表面積で８０００ｃｍ２／ｇ以上とする。より少ない石膏の使用量でより高い強度が得られ且つエネルギー効率が高いことから、ブレーン比表面積で１００００〜３００００ｃｍ２／ｇがより好ましい。 The fineness of the type II anhydrous gypsum used in the present invention is set to 8000 cm 2 / g or more in terms of Blaine specific surface area because high strength can be obtained with a smaller amount of gypsum used. Since a higher strength is obtained with a smaller amount of gypsum used and energy efficiency is higher, the brane specific surface area is more preferably 10,000 to 30,000 cm 2 / g.

本発明には、シリカ質微粉末を含有することが、より高強度を得られるので好ましい。本発明においてシリカ質微粉末とは、常温において水硬性ではない、珪酸塩又はシリカ鉱物を主成分とするブレーン比表面積で４０００ｃｍ２／ｇ以上の微粉末のことを云う。シリカ質微粉末としては、例えば、シリカフューム、メタカオリン、フライアッシュ等が挙げられる。セメント組成物の強度が高く且つ高いコンシステンシーが得られるので、シリカ質微粉末としてはシリカフュームを含有するものであることが好ましい。 In the present invention, it is preferable to contain a siliceous fine powder because higher strength can be obtained. In the present invention, the siliceous fine powder means a fine powder having a brane specific surface area of 4000 cm 2 / g or more, which is not hydraulic at room temperature and mainly contains silicate or silica mineral. Examples of the siliceous fine powder include silica fume, metakaolin, fly ash and the like. Since the cement composition has high strength and high consistency, it is preferable that the siliceous fine powder contains silica fume.

本発明においてシリカ質微粉末は、上記のII型無水石膏１００質量部に対し、３０〜４００質量部含有することが、充分なコンシステンシーを有する高強度セメント組成物が得られることから好ましい。３０質量部未満では高強度が得難く、４００質量部を超えると流動性が低下する。充分なコンシステンシー有する高強度セメント組成物を得やすいことから、より好ましくは、上記のII型無水石膏１００質量部に対し、シリカ質微粉末を５０〜２００質量部とする。   In the present invention, the siliceous fine powder is preferably contained in an amount of 30 to 400 parts by mass with respect to 100 parts by mass of the above-mentioned type II anhydrous gypsum, because a high-strength cement composition having sufficient consistency is obtained. If it is less than 30 parts by mass, it is difficult to obtain high strength, and if it exceeds 400 parts by mass, the fluidity decreases. Since it is easy to obtain a high-strength cement composition having sufficient consistency, more preferably, the siliceous fine powder is 50 to 200 parts by mass with respect to 100 parts by mass of the above-mentioned type II anhydrous gypsum.

本発明には、上記のII型無水石膏１００質量部に対し、更に、スラグ粉末を５〜２０質量部、保水剤を０．１〜２質量部含有するとすることが、セメント組成物の強度発現性が優れ且つ材料分離を起こし難いことから好ましい。   In the present invention, the strength of the cement composition is expressed by further containing 5 to 20 parts by mass of slag powder and 0.1 to 2 parts by mass of a water retention agent with respect to 100 parts by mass of the above-mentioned type II anhydrous gypsum. It is preferable because it has excellent properties and hardly causes material separation.

本発明に使用するスラグ粉末は、潜在水硬性を有し、セメント水和生成物をより強固にする。スラグ粉末としては、例えば高炉スラグ等の金属精錬で発生する鉱滓の粉末、都市ゴミ溶融スラグ粉末、下水汚泥溶融スラグ粉末等が挙げられる。安定した品質のものが得易いことから、高炉スラグ粉末が好ましい。スラグ粉末の粉末度は、添加したセメント組成物の強度が高くなることから、ブレーン比表面積で２７００〜１２０００ｃｍ２／ｇとすることが好ましい。このようなスラグ粉末の添加量は、上記のII型無水石膏１００質量部に対し、５〜２０質量部とすることが好ましい。５質量部未満では、スラグ粉末を添加した効果が得難く、２０質量部を超えると、セメント組成物のコンシステンシーが低下し易い。 The slag powder used in the present invention has latent hydraulic properties and makes the cement hydrated product stronger. Examples of the slag powder include slag powder generated by metal refining such as blast furnace slag, municipal waste molten slag powder, and sewage sludge molten slag powder. Blast furnace slag powder is preferred because it is easy to obtain a stable quality. The fineness of the slag powder is preferably 2700 to 12000 cm 2 / g in terms of Blaine specific surface area because the strength of the added cement composition is increased. It is preferable that the addition amount of such slag powder shall be 5-20 mass parts with respect to 100 mass parts of said II type anhydrous gypsum. If it is less than 5 parts by mass, it is difficult to obtain the effect of adding slag powder, and if it exceeds 20 parts by mass, the consistency of the cement composition tends to be lowered.

本発明の保水剤は、セメントの水和に必要な水を保持することで、セメント組成物の強度が高くなり且つ材料分離を抑制する。また、保水剤は、混練後のセメント組成物の保形性を高め、遠心成形を行っても材料分離により生じるスラッジ状の脆弱層(ノロ)やスラリー状の分離物（トロ）の発生を抑制する。このような保水剤としては、例えばヒドロキシメチルセルロースやヒドロキシプロピルセルロース等の水溶性セルロース；アルギン酸、β-１，３グルカン、プルラン、ウェランガム等の多糖類；アクリル樹脂やポリビニルアルコール等のポリビニル等が挙げられ、これらの一種又は二種以上の使用が可能であるが、少量で水中不分離性が高いことから水溶性セルロースが好ましい。水溶性セルロースとしては、ヒドロキシアルキルセルロースおよび／またはヒドロキシアルキルアルキルセルロースからなる非イオン性の水溶性セルロースエーテルが用いられる。ヒドロキシアルキルセルロースとしては、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等が挙げられる。ヒドロキシアルキルアルキルセルロースとしては、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、ヒドロキシエチルエチルセルロース等が挙げられる。これらの水溶性セルロースは２種以上を併用しても良い。このような保水剤の添加量は、上記のII型無水石膏１００質量部に対し、０．１〜２質量部とすることが好ましい。０．１質量部未満では、保水剤を添加した効果が得難く、２質量部を超えると、セメント組成物の粘性が過大となり作業性が悪くなる。   The water-retaining agent of the present invention retains water necessary for cement hydration, thereby increasing the strength of the cement composition and suppressing material separation. In addition, the water retention agent enhances the shape retention of the cement composition after kneading and suppresses the generation of sludge-like fragile layers (noro) and slurry-like separations (toro) caused by material separation even after centrifugal molding. To do. Examples of such water retention agents include water-soluble celluloses such as hydroxymethyl cellulose and hydroxypropyl cellulose; polysaccharides such as alginic acid, β-1,3 glucan, pullulan and welan gum; polyvinyl such as acrylic resin and polyvinyl alcohol; One or two or more of these can be used, but water-soluble cellulose is preferred because it is insoluble in water in a small amount. As the water-soluble cellulose, nonionic water-soluble cellulose ether composed of hydroxyalkyl cellulose and / or hydroxyalkylalkyl cellulose is used. Examples of the hydroxyalkyl cellulose include hydroxyethyl cellulose and hydroxypropyl cellulose. Examples of the hydroxyalkylalkylcellulose include hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, and hydroxyethylethylcellulose. Two or more of these water-soluble celluloses may be used in combination. The amount of the water retention agent added is preferably 0.1 to 2 parts by mass with respect to 100 parts by mass of the above-mentioned type II anhydrous gypsum. If the amount is less than 0.1 parts by mass, it is difficult to obtain the effect of adding the water retention agent. If the amount exceeds 2 parts by mass, the viscosity of the cement composition becomes excessive and the workability deteriorates.

また、本発明の高強度セメント組成物は、上記の高強度セメント組成物用混和材、セメント、並びに必要により添加する骨材及び他の混和材料を含有する。上記の高強度セメント組成物用混和材の添加量は、セメント１００質量部に対し５〜３０質量部が好ましい。５質量部未満では、上記の高強度セメント組成物用混和材を添加した効果が得難く、３０質量部を超えるとセメント組成物の粘性が過大となり作業性が悪くなる。   The high-strength cement composition of the present invention contains the above-mentioned admixture for high-strength cement composition, cement, and an aggregate and other admixtures to be added as necessary. The addition amount of the admixture for high-strength cement composition is preferably 5 to 30 parts by mass with respect to 100 parts by mass of cement. If the amount is less than 5 parts by mass, it is difficult to obtain the effect of adding the above-described admixture for high-strength cement composition. If the amount exceeds 30 parts by mass, the viscosity of the cement composition becomes excessive and workability deteriorates.

本発明に使用するセメントとしては、水硬性セメントであればよく、例えば、普通、早強、超早強、低熱及び中庸熱等の各種ポルトランドセメント、エコセメント、並びにこれらポルトランドセメント又はエコセメントに、フライアッシュ、高炉スラグ、シリカフューム又は石灰石微粉末等を混合した各種混合セメント、太平洋セメント社製「ジェットセメント」（商品名）や住友大阪セメント社製「ジェットセメント」（商品名）等の超速硬セメント、アルミナセメント等が挙げられ、これらを一種単独で用いる又は二種以上併用することができる。セメント組成物の圧縮強度が高いことから、セメントとして普通ポルトランドセメント又は／及び早強ポルトランドセメントを使用することが好ましい。   The cement used in the present invention may be a hydraulic cement. For example, various portland cements such as normal, early strength, ultra-early strength, low heat and moderate heat, ecocements, and these portland cements or ecocements, Various mixed cements mixed with fly ash, blast furnace slag, silica fume, limestone fine powder, etc., "Jet Cement" (trade name) manufactured by Taiheiyo Cement Co., Ltd. and "Jet Cement" (trade name) manufactured by Sumitomo Osaka Cement Co., Ltd. , Alumina cement, and the like. These may be used alone or in combination of two or more. Since the compressive strength of the cement composition is high, it is preferable to use ordinary Portland cement and / or early strong Portland cement as the cement.

本発明に必要により使用する骨材としては、モルタルやコンクリートに使用可能な骨材であればよく、例えば、川砂、海砂、山砂、砕砂、人工細骨材、スラグ細骨材、再生細骨材、スラグ細骨材、珪砂、石粉、川砂利、陸砂利、砕石、人工粗骨材、再生粗骨材、スラグ粗骨材等が挙げられ、これらの一種又は二種以上の使用が可能である。   The aggregate used in the present invention may be any aggregate that can be used for mortar and concrete, for example, river sand, sea sand, mountain sand, crushed sand, artificial fine aggregate, slag fine aggregate, recycled fine aggregate. Aggregates, slag fine aggregates, silica sand, stone powder, river gravel, land gravel, crushed stone, artificial coarse aggregate, recycled coarse aggregate, slag coarse aggregate, etc. can be used, one or more of these can be used It is.

本発明に必要により使用する他の混和材料としては、モルタルやコンクリートに使用可能な混和材料であればよく、セメント、上記のII型無水石膏、シリカ質微粉末、保水剤及びスラグ粉末以外に、上記以外の混和材料の一種又は二種以上を本発明の効果を損なわない範囲で併用することができる。この混和材料としては、例えば減水剤，高性能ＡＥ減水剤，高性能減水剤，ＡＥ減水剤，流動化剤等のセメント分散剤、セメント用ポリマー、発泡剤、起泡剤、防水材、防錆剤、収縮低減剤、顔料、繊維、撥水剤、白華防止剤、膨張材(剤)、急結剤(材)、急硬剤(材)、消泡剤、石灰石粉末、撥水剤、表面硬化剤等が挙げられる。   Other admixtures used as necessary in the present invention may be any admixture that can be used for mortar and concrete, in addition to cement, the above-mentioned type II anhydrous gypsum, siliceous fine powder, water retention agent and slag powder, One or more admixtures other than those described above can be used in combination as long as the effects of the present invention are not impaired. Examples of this admixture include water-reducing agents, high-performance AE water-reducing agents, high-performance water-reducing agents, AE water-reducing agents, cement dispersants such as fluidizing agents, cement polymers, foaming agents, foaming agents, waterproofing materials, and rust prevention. Agent, shrinkage reducing agent, pigment, fiber, water repellent, anti-whitening agent, expansion material (agent), quick setting agent (material), hardener (material), antifoaming agent, limestone powder, water repellent, A surface hardening agent etc. are mentioned.

本発明の高強度セメント組成物は、水を混練に用いる。混和材料に含まれる水を用いてもよい。水と混練する方法は特に限定されず、例えば本発明の高強度セメント組成物を全量加え混練する方法、本発明の高強度セメント組成物を２以上に分けて混練し、分けて混練したものを合わせて更に混練する方法等がある。また、混練に用いる器具や混練装置も特に限定されないが、ミキサを用いることが量を多く混練できるので好ましい。用いることのできるミキサとしては連続式ミキサでもバッチ式ミキサでも良く、例えばパン型コンクリートミキサ、パグミル型コンクリートミキサ、重力式コンクリートミキサ、グラウトミキサ、ハンドミキサ、左官ミキサ等が挙げられる。   The high-strength cement composition of the present invention uses water for kneading. You may use the water contained in an admixture. The method of kneading with water is not particularly limited. For example, a method of adding and kneading all the high-strength cement composition of the present invention, kneading the high-strength cement composition of the present invention in two or more, and kneading separately. In addition, there is a method of further kneading. Moreover, although the apparatus and kneading apparatus used for kneading are not particularly limited, it is preferable to use a mixer because a large amount can be kneaded. The mixer that can be used may be a continuous mixer or a batch mixer, such as a pan concrete mixer, a pug mill concrete mixer, a gravity concrete mixer, a grout mixer, a hand mixer, and a plaster mixer.

＜高強度セメント組成物用混和材の作製＞
表１に示す配合割合で、レーディゲミキサ（ＦＭ１３０Ｄ）により３分間混合し、高強度セメント組成物用混和材を作製した。このときの使用材料を以下に示す。
＜使用材料＞
スラグ粉末： 高炉スラグ粉末（市販品、ブレーン比表面積；４０００ｃｍ２／ｇ）
シリカ質微粉末： シリカフューム（市販品、ＢＥＴ比表面積；２０ｍ２／ｇ）
II型無水石膏： 石膏ボード廃材を粉砕後に３５０℃以上の温度で焼成することにより再生したII型無水石膏（ＳＯ３量：５６．８重量％、ブレーン比表面積；１２０００ｃｍ２／ｇ）
保水剤： 水溶性セルロース系増粘剤（商品名「メトローズＳＥＢ−０４Ｔ」，信越化学工業社製，主成分；ヒドロキシエチルメチルセルロース） <Preparation of admixture for high-strength cement composition>
The blending ratio shown in Table 1 was mixed for 3 minutes with a Redige mixer (FM130D) to prepare an admixture for high-strength cement composition. The materials used at this time are shown below.
<Materials used>
Slag powder: Blast furnace slag powder (commercial product, Blaine specific surface area; 4000 cm 2 / g)
Siliceous fine powder: Silica fume (commercial product, BET specific surface area; 20 m 2 / g)
Type II anhydrous gypsum: Type II anhydrous gypsum regenerated by pulverizing gypsum board waste material at a temperature of 350 ° C. or higher (SO 3 amount: 56.8% by weight, Blaine specific surface area; 12000 cm 2 / g)
Water retention agent: Water-soluble cellulose thickener (trade name "Metroise SEB-04T", manufactured by Shin-Etsu Chemical Co., Ltd., main component: hydroxyethyl methylcellulose)

Figure 2009161377
Figure 2009161377

＜高強度セメント組成物の作製＞
作製した高強度セメント組成物用混和材及び次に示す使用材料を、表２に示す配合割合となるように、パグミル型コンクリートミキサに全材料を投入後２分間混練することで、本発明の高強度セメント組成物に相当するコンクリートを作製した。
＜使用材料＞
セメント： 早強ポルトランドセメント（太平洋セメント社製）
セメント分散剤： ポリカルボン酸系高性能減水剤（商品名「コアフローＣＰ−３４０」、太平洋マテリアル社製）
細骨材： 静岡県菊川市産山砂（密度；２．６１ｇ／ｃｍ３）
粗骨材： 茨城県桜川市産砕石（最大粒径；２０ｍｍ，密度；２．６４ｇ／ｃｍ３）
水： 水道水 <Preparation of high-strength cement composition>
The prepared high-strength cement composition admixture and the following materials used were mixed in a pug mill type concrete mixer for 2 minutes so that the blending ratios shown in Table 2 were obtained. Concrete corresponding to the strength cement composition was prepared.
<Materials used>
Cement: Early strong Portland cement (manufactured by Taiheiyo Cement)
Cement dispersant: Polycarboxylic acid-based high-performance water reducing agent (trade name “Core Flow CP-340”, manufactured by Taiheiyo Materials Co., Ltd.)
Fine aggregate: mountain sand from Kikugawa city, Shizuoka prefecture (density: 2.61 g / cm 3 )
Coarse aggregate: Crushed stone from Sakuragawa City, Ibaraki Prefecture (maximum particle size: 20 mm, density: 2.64 g / cm 3 )
Water: tap water

Figure 2009161377
Figure 2009161377

＜コンクリートの流動性の評価＞
前記の如く混練して得たコンクリートの流動性の評価を、ＪＩＳ Ａ １１０１に準じたスランプ試験により、混練終了１分以内のコンクリートに対して行った。その結果を表３に表す。 <Evaluation of fluidity of concrete>
Evaluation of the fluidity of the concrete obtained by kneading as described above was performed on the concrete within 1 minute after the completion of kneading by a slump test according to JIS A 1101. The results are shown in Table 3.

＜コンクリートの圧縮強度の評価＞
前記の混練して得たコンクリートを用い、ＪＩＳ Ａ １１０８に準拠した方法でコンクリート供試体の圧縮強度を測定した。ここで、測定に用いる供試体は、内寸直径１０ｃｍ，高さ２０ｃｍの円柱状型枠にコンクリートを振動充填し、充填状態のまま蒸気養生処理（処理条件；前置き時間を４時間とし、１５℃／ＨＲで７０℃まで昇温させ、７０℃で４時間保持し、当該保持後は自然放冷し、約３０℃に至った時点で脱型）を行い、更に脱型後は常温下で気中養生を行い、材齢７日の供試体とした。圧縮強度の測定結果も表３に表す。 <Evaluation of compressive strength of concrete>
Using the concrete obtained by kneading, the compressive strength of the concrete specimen was measured by a method according to JIS A 1108. Here, the specimen used for the measurement was concrete filled in a cylindrical mold with an inner diameter of 10 cm and a height of 20 cm, and steam curing treatment (treatment condition; pre-treatment time was 4 hours, 15 ° C. with the filling state) / HR is raised to 70 ° C., held at 70 ° C. for 4 hours, allowed to cool naturally after that holding, and demolded when it reaches about 30 ° C.). Medium curing was performed, and specimens with a material age of 7 days were obtained. The measurement results of the compressive strength are also shown in Table 3.

Figure 2009161377
Figure 2009161377

＜遠心成形によるコンクリート成形物の作製＞
また、前記の如く混練して得たコンクリートを用い、ＪＩＳ Ａ１１３６に準拠し、内寸直径２０ｃｍ，長さ３０ｃｍの小型遠心管を用い、次に示す二種類の条件で遠心成形を行った。
通常回転遠心成形；遠心力５Ｇで１分、次いで１５Ｇで２分、更に３５Ｇで８分。
低速回転遠心成形；遠心力２Ｇで５分、次いで４Ｇで３分、更に２０Ｇで３分。 <Production of concrete molding by centrifugal molding>
Further, the concrete obtained by kneading as described above was subjected to centrifugal molding under the following two conditions using a small centrifuge tube having an inner diameter of 20 cm and a length of 30 cm in accordance with JIS A1136.
Normal rotary centrifugal molding: 1 minute at 5G centrifugal force, then 2 minutes at 15G, and 8 minutes at 35G.
Low speed rotary centrifuge molding: 5 minutes at 2G centrifugal force, then 3 minutes at 4G, 3 minutes at 20G.

遠心成形後は、これを常圧蒸気養生した。蒸気養生は、前置き時間を４時間とし、１５℃／ＨＲで７０℃まで昇温させ、７０℃で４時間保持した。当該保持後は自然放冷し、約３０℃に至った時点で脱型した。   After centrifugal molding, this was subjected to normal pressure steam curing. In the steam curing, the pre-treatment time was 4 hours, the temperature was raised to 70 ° C. at 15 ° C./HR, and held at 70 ° C. for 4 hours. After the holding, it was naturally cooled and demolded when it reached about 30 ° C.

＜コンクリートの遠心成形特性の評価＞
遠心成形に供したコンクリートの成形特性について、次に示す通常遠心成形における締固め性と低速回転遠心成形における保形性により評価した。これらの結果は、表４に表す。
［締固め性］
締固め性は、脱型後の成形物を目視し、成形物内面が平滑な曲面となったものを締固め性「良好」と判断し、例えば成形物内面が波打つような面となったもののように平滑な曲面とならなかったものを全て締固め性「不良」と判断した。また併せて、締固め後の成形物内面に残存する脆弱層（ノロ層）の平均厚さをノギスにより測定した。
［保形性］
保形性は、脱型後の成形物を目視し、低粘性状態のスラリー状の分離物（トロ）の発生が見られず、成形物内面が平滑な曲面となり且つ当該平滑曲面が３０分経過後も実質変形なく維持されていたものを保形性「良好」と判断し、それ以外の状況となったものを全て保形性「不良」と判断した。 <Evaluation of centrifugal molding characteristics of concrete>
The molding characteristics of the concrete subjected to centrifugal molding were evaluated by the compaction property in normal centrifugal molding and the shape retention property in low-speed rotational centrifugal molding as shown below. These results are shown in Table 4.
[Compactability]
For compaction, visually check the molded product after demolding, and determine that the molded product inner surface has a smooth curved surface and that the compaction property is “good”. For example, the molded product inner surface becomes a wavy surface. Thus, all the samples that did not become smooth curved surfaces were judged to have a compaction property of “bad”. In addition, the average thickness of the fragile layer (Noro layer) remaining on the inner surface of the molded product after compaction was measured with calipers.
[Shape retention]
As for shape retention, the molded product after demolding is visually observed, the occurrence of low-viscosity slurry-like separation (tro) is not observed, the molded product inner surface becomes a smooth curved surface, and the smooth curved surface has passed for 30 minutes. After that, those that were maintained without substantial deformation were judged as “good” in shape retention, and those in other situations were judged as “bad” in shape retention.

Figure 2009161377
Figure 2009161377

表３の結果から、本発明の高強度セメント組成物用混和材を使用したコンクリートは、低水量配合にしても施工や成形に適した流動性が確保し易く、加熱養生（蒸気養生）後は圧縮強度が１１０Ｎ／ｍｍ２以上と、高い強度発現性を有した。更に表４の結果から、該高強度セメント組成物用混和材を適量使用したコンクリートは、遠心成形を行った際の材料分離により生じるノロ及びトロの発生量も著しく低く、優れた保形性を呈し、しかも非常に高い強度発現性を有する成形物が得られることがわかる。 From the results in Table 3, the concrete using the admixture for high-strength cement composition of the present invention is easy to ensure fluidity suitable for construction and molding even with a low water content, and after heat curing (steam curing) The compressive strength was 110 N / mm 2 or more and high strength expression. Furthermore, from the results shown in Table 4, the concrete using an appropriate amount of the admixture for high-strength cement composition has significantly low generation of noro and toro due to material separation during centrifugal molding, and has excellent shape retention. It can be seen that there is obtained a molded product that exhibits very high strength.

本発明の高強度セメント組成物用混和材およびこれを用いた高強度セメント組成物は、高強度モルタルや高強度コンクリート等の製造に用いることができる。特に、遠心成形により製造されるヒューム管等に好適に持ちいることができる。   The admixture for high-strength cement composition of the present invention and the high-strength cement composition using the admixture can be used for producing high-strength mortar, high-strength concrete and the like. In particular, it can be suitably used for a fume tube manufactured by centrifugal molding.

Claims (4)

石膏廃材を加熱処理してなるブレーン比表面積で８０００ｃｍ２／ｇ以上のII型無水石膏を含有することを特徴とする高強度セメント組成物用混和材。 A high-strength cement composition admixture comprising II-type anhydrous gypsum having a specific surface area of 8000 cm 2 / g or more obtained by heat-treating gypsum waste. 更に、シリカ質微粉末を含有する請求項１に記載する高強度セメント組成物用混和材。 The admixture for high-strength cement composition according to claim 1, further comprising a siliceous fine powder. 上記のII型無水石膏１００質量部に対し、上記のシリカ質微粉末を３０〜４００質量部、スラグ粉末を５〜２０質量部、保水剤を０．１〜２質量部含有する請求項１または請求項２に記載する高強度セメント組成物用混和材。 The said siliceous fine powder contains 30 to 400 parts by mass, 5 to 20 parts by mass of slag powder, and 0.1 to 2 parts by mass of water retention agent with respect to 100 parts by mass of the above type II anhydrous gypsum. The admixture for high-strength cement compositions according to claim 2. 請求項１〜請求項３の何れかに記載する高強度セメント組成物用混和材と、セメントとを含有する高強度セメント組成物。 The high-strength cement composition containing the admixture for high-strength cement compositions in any one of Claims 1-3, and a cement.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012162413A (en) * 2011-02-04 2012-08-30 Taiheiyo Cement Corp High-strength porous concrete composition, and high-strength porous concrete hardened body
WO2014196682A1 (en) * 2013-06-04 2014-12-11 코오롱글로벌 주식회사 Seawater resistant grout material composition and method for constructing offshore wind turbine structure using same
JP2020142940A (en) * 2019-03-05 2020-09-10 太平洋セメント株式会社 Cement composition
JP7460065B2 (en) 2019-11-11 2024-04-02 住友大阪セメント株式会社 Coating material, tubular molded body, manufacturing method for tubular molded body, and coating method

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1036149A (en) * 1996-07-23 1998-02-10 Chichibu Onoda Cement Corp Recycle utilization of waste plasterboard
JP2000233955A (en) * 1998-12-18 2000-08-29 Taiheiyo Cement Corp Hardening accelerator for high flowage spraying concrete
JP2001019511A (en) * 1999-06-29 2001-01-23 Taiheiyo Cement Corp Accelerator for highly fluid spray concrete
JP2001146420A (en) * 1999-11-18 2001-05-29 Taiheiyo Cement Corp Anhydrous gypsum compounds produced from gypsum waste material and method for producing the same
JP2002037656A (en) * 2000-07-26 2002-02-06 Taiheiyo Cement Corp Wet spraying concrete
JP2002068740A (en) * 2000-09-01 2002-03-08 Taiheiyo Cement Corp Method for manufacturing anhydrous gypsum for cement composition from gypsum waste material
JP2002316849A (en) * 2001-04-17 2002-10-31 Denki Kagaku Kogyo Kk Quick setting admixture for spraying, slurry of quick setting admixture for spraying, quick setting cement concrete and spraying construction method
JP2004210552A (en) * 2002-12-26 2004-07-29 Taiheiyo Material Kk Quick-setting agent for spray concrete
WO2005042432A1 (en) * 2003-10-31 2005-05-12 Denki Kagaku Kogyo Kabushiki Kaisha Rapidly curable composition for cement and process for producing the same
JP2006182617A (en) * 2004-12-28 2006-07-13 Taiheiyo Material Kk Quick setting agent and spray material using the same
JP2007217261A (en) * 2006-02-20 2007-08-30 Taiheiyo Material Kk Quick-hardening hydraulic composition
JP2009114018A (en) * 2007-11-06 2009-05-28 Taiheiyo Material Kk Admixture for quick hardening cement composition, quick hardening cement composition containing the same, quick hardening cement kneaded material and spraying material

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1036149A (en) * 1996-07-23 1998-02-10 Chichibu Onoda Cement Corp Recycle utilization of waste plasterboard
JP2000233955A (en) * 1998-12-18 2000-08-29 Taiheiyo Cement Corp Hardening accelerator for high flowage spraying concrete
JP2001019511A (en) * 1999-06-29 2001-01-23 Taiheiyo Cement Corp Accelerator for highly fluid spray concrete
JP2001146420A (en) * 1999-11-18 2001-05-29 Taiheiyo Cement Corp Anhydrous gypsum compounds produced from gypsum waste material and method for producing the same
JP2002037656A (en) * 2000-07-26 2002-02-06 Taiheiyo Cement Corp Wet spraying concrete
JP2002068740A (en) * 2000-09-01 2002-03-08 Taiheiyo Cement Corp Method for manufacturing anhydrous gypsum for cement composition from gypsum waste material
JP2002316849A (en) * 2001-04-17 2002-10-31 Denki Kagaku Kogyo Kk Quick setting admixture for spraying, slurry of quick setting admixture for spraying, quick setting cement concrete and spraying construction method
JP2004210552A (en) * 2002-12-26 2004-07-29 Taiheiyo Material Kk Quick-setting agent for spray concrete
WO2005042432A1 (en) * 2003-10-31 2005-05-12 Denki Kagaku Kogyo Kabushiki Kaisha Rapidly curable composition for cement and process for producing the same
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