JP2006182608A - Quick hardening self-leveling admixture and quick hardening self-leveling composition - Google Patents

Quick hardening self-leveling admixture and quick hardening self-leveling composition Download PDF

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JP2006182608A
JP2006182608A JP2004378667A JP2004378667A JP2006182608A JP 2006182608 A JP2006182608 A JP 2006182608A JP 2004378667 A JP2004378667 A JP 2004378667A JP 2004378667 A JP2004378667 A JP 2004378667A JP 2006182608 A JP2006182608 A JP 2006182608A
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leveling
self
admixture
quick hardening
hardening self
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Takahisa Ichimura
高央 市村
Yutaka Nakajima
裕 中島
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Taiheiyo Materials Corp
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<P>PROBLEM TO BE SOLVED: To provide a quick hardening self-leveling admixture with which a high self-leveling performance can be stably maintained for a long period of time, the rapid setting is realized after starting setting, and thereby, the separation of materials can be sufficiently suppressed, and to provide a quick hardening self-leveling composition using the same. <P>SOLUTION: The quick hardening self-leveling admixture contains a nitrite or nitrate of an alkaline earth metal, a water reducer, and hydrophilic particles inactive and insoluble to water and having a BET specific surface area of 2-35 m<SP>2</SP>/g. The quick hardening self-leveling composition contains the quick hardening self-leveling admixture and cement. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、水硬性のセルフレベリング材の硬化時間を短縮するための急硬性セルフレベリング混和剤及びこれを用いたセルフレベリング組成物に関する。   The present invention relates to a rapid hardening self-leveling admixture for shortening the curing time of a hydraulic self-leveling material and a self-leveling composition using the same.

平滑性が要求される床材等に用いるセメント系のセルフレベリング材は、高い流動性を有するため、低温になると材料分離が起こり易くなる。材料分離は、ひび割れ発生や白華による美観喪失の原因になる。増粘剤を加えてモルタルやコンクリートの材料分離を抑制する方法は旧来から行われているが、増粘剤を大量に使用すると粘性が増し、セルフレベリング性が低下し易い。この傾向は、一般に低温になるに連れて粘性が増大することから、より顕著になる。増粘剤の使用に因らない優れた材料分離として、強力な急硬成分であるカルシウムアルミネート類を使用し、硬化時間を早め、材料分離が進行する前に凝結を終結させることで、材料分離を防ぐ方法が知られている。(例えば、特許文献1参照。)一方で、カルシウムアルミネート類を使用すると、分散剤を併用しても、温度に拘わらず長時間に渡って高い流動性を保持するのは極めて困難になり、セルフレベリング性が低下する。凝結遅延剤の併用で、ある程度の時間、流動性を維持し続けることも可能になるが、安定したセルフレベリング性能発現に不可欠な分散剤が占めるべきセメント粒の吸着サイトの多くを遅延剤が優先的に占拠してしまうことから、成分分散性が低下したり、この低下により均一なセルフレベリング性能を安定して発現できなくなる。このため、材料分離の抑止に効果がある凝結促進作用を有し、分散剤との併用が可能で、セルフレベリング性を減退させることもない急硬成分として亜硝酸カルシウムを用いたセルフレベリング材が知られるようになった。(例えば、特許文献2参照。)
特開平7−69704号公報 特開2004−37653号公報
Cement-based self-leveling materials used for floor materials and the like that require smoothness have high fluidity, and therefore, material separation tends to occur at low temperatures. Material separation causes cracking and loss of aesthetics due to white flower. A method for suppressing the material separation of mortar and concrete by adding a thickener has been used for a long time, but when a large amount of the thickener is used, the viscosity increases and the self-leveling property tends to be lowered. This tendency becomes more prominent because the viscosity generally increases with decreasing temperature. As an excellent material separation that does not depend on the use of thickeners, the use of calcium aluminates, which are powerful rapid-hardening components, accelerates the setting time and terminates the setting before the material separation proceeds. Methods for preventing separation are known. (For example, refer to Patent Document 1) On the other hand, when calcium aluminates are used, it becomes extremely difficult to maintain high fluidity over a long period of time regardless of temperature, even if a dispersant is used in combination. Self-leveling properties are reduced. Although it is possible to maintain fluidity for a certain amount of time by using a set retarder, the retarder gives priority to many adsorbing sites of cement grains that should be occupied by a dispersant essential for stable self-leveling performance. Therefore, the component dispersibility is lowered, and the uniform self-leveling performance cannot be stably exhibited due to this reduction. For this reason, a self-leveling material using calcium nitrite as a quick-hardening component that has a setting acceleration effect effective in suppressing material separation, can be used in combination with a dispersant, and does not reduce self-leveling properties. Became known. (For example, see Patent Document 2.)
JP-A-7-69704 JP 2004-37653 A

セルフレベリング材の使用にあたっては材料配合時から実施工まで十分な作業時間を確保したい場合も多く、材料分離抑止のための急硬成分として亜硝酸カルシウムを用いると、適度なセルフレベリング性能を長時間保持することは困難であった。そこで本発明は、安定して高いセルフレベリング性能を長時間維持でき、凝結開始後は急速に凝結が進行して材料分離の抑止に十分効果がある急硬性セルフレベリング混和剤及び該混和剤を用いた急硬性セルフレベリング組成物を提供することを課題とする。   When using self-leveling materials, there are many cases where it is desired to secure sufficient work time from the mixing of materials to the execution of work. It was difficult to hold. Therefore, the present invention uses a rapid hardening self-leveling admixture that can maintain a stable and high self-leveling performance for a long time, has a sufficient effect on the suppression of material separation by rapid setting after the start of setting, and the admixture. It is an object of the present invention to provide a quick hardening self-leveling composition.

本発明者らは、前記課題解決のための検討を重ねた結果、アルカリ土類金属の亜硝酸塩又はアルカリ土類金属の硝酸塩と、減水剤に特定の物理化学性状を有する粒子を加えることで、安定した高いセルフレベリング性能を長時間維持でき、材料分離が極めて生じ難い急硬性セルフレベリング混和剤及び急硬性セルフレベリング組成物が得られたことから本発明を完成した。   As a result of repeated studies for solving the above problems, the present inventors added alkaline earth metal nitrite or alkaline earth metal nitrate and particles having specific physicochemical properties to the water reducing agent. The present invention has been completed because a rapid hardening self-leveling admixture and a rapid hardening self-leveling composition that can maintain stable and high self-leveling performance for a long time and hardly cause material separation are obtained.

即ち、本発明は、次の(1)〜(2)の急硬性セルフレベリング混和剤及び(3)の急硬性セルフレベリング組成物である。(1)アルカリ土類金属の亜硝酸塩又は硝酸塩と、減水剤と、水に不活性且つ不溶性でBET比表面積が2〜35m2/gの親水性粒子を含有してなる急硬性セルフレベリング混和剤。(2)更に、硼酸エステルを含有してなる前記(1)の急硬性セルフレベリング混和剤。(3)前記(1)又は(2)の急硬性セルフレベリング混和剤とセメントを含有してなる急硬性セルフレベリング組成物。 That is, this invention is the quick hardening self-leveling admixture of the following (1)-(2) and the quick hardening self-leveling composition of (3). (1) Alkaline earth metal nitrite or nitrate, water reducing agent, rapid hardening self-leveling admixture containing hydrophilic particles that are inert and insoluble in water and have a BET specific surface area of 2 to 35 m 2 / g . (2) The rapid hardening self-leveling admixture according to (1), further comprising a boric acid ester. (3) A rapid hardening self-leveling composition comprising the rapid hardening self-leveling admixture of (1) or (2) and cement.

本発明の急硬性セルフレベリング混和剤を用いることにより、注水混練してから1時間以上経過しても安定してセルフレベリング性能を維持することができるとと共に、材料分離が十分抑止され、表面平滑性に優れた硬化体が得られる。しかも、このような性状は5℃以下の低温下でも容易に発揮させることができる。   By using the rapid hardening self-leveling admixture of the present invention, self-leveling performance can be stably maintained even after 1 hour or more after water injection and kneading, material separation is sufficiently suppressed, and surface smoothing is achieved. A cured product having excellent properties can be obtained. Moreover, such properties can be easily exhibited even at a low temperature of 5 ° C. or less.

本発明の急硬性セルフレベリング混和剤は、セメント等の水硬性物質、これを含むペーストやモルタル等に混和することでセルフレベリング性を付与するものである。本急硬性セルフレベリング混和剤に使用するアルカリ土類金属の亜硝酸塩やアルカリ土類金属の硝酸塩は、急硬性を発現し、硬化時の材料分離を抑止する。アルカリ土類金属の亜硝酸塩としては、亜硝酸マグネシウム、亜硝酸カルシウム、亜硝酸ストロンチウム、亜硝酸バリウムを挙げることができ、またアルカリ土類金属の硝酸塩としては、硝酸マグネシウム、硝酸カルシウム、硝酸ストロンチウム、硝酸バリウムを挙げることができる。本発明ではここに挙げた何れか1種を用いれば良いが、2種以上の併用を阻むものではない。好ましくは、経済性及び硬化後の強度発現性が良好であることから亜硝酸カルシウムが適当である。   The rapid hardening self-leveling admixture of the present invention imparts self-leveling properties by mixing with a hydraulic substance such as cement, a paste or mortar containing the same. Alkaline earth metal nitrites and alkaline earth metal nitrates used in the rapid hardening self-leveling admixture exhibit rapid hardening and inhibit material separation during curing. Examples of alkaline earth metal nitrites include magnesium nitrite, calcium nitrite, strontium nitrite, and barium nitrite, and examples of alkaline earth metal nitrates include magnesium nitrate, calcium nitrate, strontium nitrate, Mention may be made of barium nitrate. In the present invention, any one of those listed here may be used, but it does not prevent the combined use of two or more. Preferably, calcium nitrite is suitable because it is economical and has good strength development after curing.

また、本急硬性セルフレベリング混和剤に使用する分散剤は、主に配合各成分の分散性を高め、均一なセルフレベリング性能を安定して発現させるためのもので、モルタルやコンクリートに使用できるものなら何れの分散剤でも良く、また減水剤、AE減水剤、高性能減水剤又は高性能AE減水剤であっても良い。分散剤を具体的に示すと、例えば、リグニンスルホン酸系AE減水剤、ナフタレンスルホン酸系高性能減水剤、メラミンスルホン酸系高性能減水剤、ポリカルボン酸系高性能AE減水剤を挙げることができる。好ましくはセルフレベリング性の保持能力が高くなることからポリカルボン酸系高性能AE減水剤が適当である。分散剤の配合量は、アルカリ土類金属の亜硝酸塩や硝酸塩100重量部に対し、固型分で10〜100重量部が好ましい。10重量部未満では流動性や成分分散性が低下し、高いセルフレベリング性能の発現が困難になる。また、100重量部を超えると強度低下を起こすことがある。   In addition, the dispersant used in this rapid hardening self-leveling admixture is mainly to increase the dispersibility of each component and to ensure uniform self-leveling performance, and can be used for mortar and concrete Any dispersant may be used, and a water reducing agent, AE water reducing agent, high performance water reducing agent, or high performance AE water reducing agent may be used. Specific examples of the dispersant include lignin sulfonic acid AE water reducing agent, naphthalene sulfonic acid high performance water reducing agent, melamine sulfonic acid high performance water reducing agent, and polycarboxylic acid high performance AE water reducing agent. it can. A polycarboxylic acid-based high-performance AE water reducing agent is suitable because it preferably has a high leveling ability. The blending amount of the dispersant is preferably 10 to 100 parts by weight in solid form with respect to 100 parts by weight of alkaline earth metal nitrite or nitrate. If it is less than 10 parts by weight, fluidity and component dispersibility are lowered, and it becomes difficult to develop high self-leveling performance. On the other hand, when the amount exceeds 100 parts by weight, the strength may be lowered.

また、本急硬性セルフレベリング混和剤に必須含有される特定の物理化学特性を有する粒子は、その特性が、水に不活性であり、水に不溶性であり、BET比表面積2〜35m2/gであり、親水性であることで、これらの条件を全て備えた粒子であれば、何れの粒子でも良い。ここで、水に不活性とは、単独では水と反応を実質起こさないことの他に、例えば結晶中に構造水を実質形成させないことも含む。また水に不溶性とは、少なくとも通常使用される温度で、水に実質不溶性であれば良く、例えば40℃以下の温度では、水に対する溶解度が100ppmを超えないことが必要である。また、親水性とは例えば一部疎水基を有していても全体としては親水性を呈する粒子であれば良い。以上の特性を有する粒子を用いることで、水性スラリー中では、初期に該粒子表面に多量の分散剤が吸着保持され、水中に遊離している分散剤がセメント等の水硬性物質に吸着されて減少すると平衡状態を保つため、粒子表面に保持された分散剤が水中に放出される。この機能により分散能力の経時低下を防ぐことができ、安定した高いセルフレベリング性能を発揮することが可能になる。水に溶解する粒子や非親水性粒子では分散剤を吸着保持することは事実上できず、水に活性な粒子では当該機能が著しく弱く、またBET比表面積が2m2/g未満の粒子では分散剤吸着保持力が弱いため好ましくなく、35m2/gを超えると分散剤吸着保持力が高まり過ぎて水中への放出がスムーズに進み難くなり、またコストも高騰するので好ましくない。以上のような物理化学特性を有する粒子の具体的に示すと、何れもBET比表面積2〜35m2/gの例えばゼオライト、アッシュダスト、フライアッシュ、珪石微粉、ムライト微粉等を挙げることができる。このような粒子の配合量は、アルカリ土類金属の亜硝酸塩や硝酸塩100重量部に対し、1000〜10000重量部が好ましい。1000重量部未満では前記機能の発現が乏しくなり、また10000重量部を超えると急硬性の発現が低下することがある。 In addition, the particles having specific physicochemical properties that are essential in the rapid hardening self-leveling admixture are inert to water, insoluble in water, and have a BET specific surface area of 2 to 35 m 2 / g. Any particles can be used as long as they are hydrophilic and have all these conditions. Here, the inertness to water includes not causing substantially no reaction with water by itself, but also not substantially forming structural water in the crystal. The term “insoluble in water” may be at least a temperature that is usually used and substantially insoluble in water. For example, at a temperature of 40 ° C. or lower, it is necessary that the solubility in water does not exceed 100 ppm. In addition, the hydrophilicity may be, for example, a particle that exhibits a hydrophilic property as a whole even if it partially has a hydrophobic group. By using particles having the above characteristics, in an aqueous slurry, a large amount of dispersant is adsorbed and retained on the surface of the particle in the initial stage, and the dispersant that is released in water is adsorbed by a hydraulic substance such as cement. When reduced, the dispersant retained on the particle surface is released into water to maintain equilibrium. With this function, it is possible to prevent the dispersion capacity from decreasing with time, and to exhibit stable and high self-leveling performance. It is practically impossible to adsorb and retain the dispersant with water-soluble particles or non-hydrophilic particles, and the function is extremely weak with water-active particles, and the particles with a BET specific surface area of less than 2 m 2 / g are dispersed. It is not preferable because the adsorbing ability of the agent is weak, and if it exceeds 35 m 2 / g, the dispersing ability of the adsorbing agent is excessively increased, making it difficult for the release to the water to proceed smoothly, and the cost also increases. Specific examples of the particles having the above physicochemical properties include zeolite, ash dust, fly ash, silica fine powder, mullite fine powder and the like, all having a BET specific surface area of 2 to 35 m 2 / g. The blending amount of such particles is preferably 1000 to 10,000 parts by weight with respect to 100 parts by weight of alkaline earth metal nitrite or nitrate. If the amount is less than 1000 parts by weight, the expression of the function is poor, and if it exceeds 10,000 parts by weight, the expression of rapid hardening may be reduced.

また、本急硬性セルフレベリング混和剤は、更に硼酸エステルを含有することができる。硼酸エステルを配合使用することによって、厳冬期などの低温下で減退傾向が見られる材料分離抑止作用を向上させ、高いセルフレベリング性能を長時間維持することができる。硼酸エステルの配合量は、アルカリ土類金属の亜硝酸塩や硝酸塩100重量部に対し、1〜20重量部が好ましい。1重量部未満では配合効果が殆ど見られず、20重量部を超えても材料分離抑止作用が殆ど向上せず.コスト増となる。本急硬性セルフレベリング混和剤は、本発明の効果を実質喪失させない範囲で前記以外の成分を更に含むものであっても良く、例えば増粘剤、白華防止剤、空気連行剤、膨張剤、収縮低減剤、消泡剤等が挙げられる。   Further, the rapid hardening self-leveling admixture can further contain a boric acid ester. By blending and using boric acid esters, it is possible to improve the material separation inhibiting action, which tends to decrease at low temperatures such as in the severe winter season, and to maintain high self-leveling performance for a long time. The amount of the boric acid ester is preferably 1 to 20 parts by weight with respect to 100 parts by weight of alkaline earth metal nitrite or nitrate. If the amount is less than 1 part by weight, the blending effect is hardly seen, and if it exceeds 20 parts by weight, the material separation inhibiting action is hardly improved. Cost increases. The rapid hardening self-leveling admixture may further contain components other than those described above as long as the effects of the present invention are not substantially lost.For example, a thickener, an anti-whitening agent, an air entraining agent, an expanding agent, A shrinkage reducing agent, an antifoamer, etc. are mentioned.

また、本発明の急硬性セルフレベリング組成物は、セメントに少なくとも前記急硬性セルフレベリング混和剤を配合したものである。使用するセメントは水硬性のセメントであれば良く、使用に比較的適したセメントを例示すると、普通ポルトランドセメント、中庸熱ポルトランドセメント等の各種ポルトランドセメント、高炉セメント、フライアッシュセメント、シリカセメント等の各種混合セメント、エコセメント等の特殊セメントを挙げることができ、2種以上を併用しても良い。また、水和反応がかなり速い早強又は超早強ポルトランドセメント、白色セメントではセルフレベリング性を長時間維持し難くなることからこれらのセメントを主体とした使用は避けるのが望ましい。セメントと前記急硬性セルフレベリング混和剤の配合割合は、セメント100重量部に対し、前記急硬性セルフレベリング混和剤10〜50重量部とする。急硬性セルフレベリング混和剤10重量部未満ではセルフレベリング性能が発現され難く、また50重量部を超えると硬化時間が遅延することがあるので適当でない。   Moreover, the rapid hardening self-leveling composition of the present invention is obtained by blending at least the rapid hardening self-leveling admixture with cement. The cement used may be a hydraulic cement, and examples of relatively suitable cements include various portland cements such as ordinary portland cement and moderately heated portland cement, various types of blast furnace cement, fly ash cement, silica cement and the like. Special cements such as mixed cement and eco-cement can be mentioned, and two or more kinds may be used in combination. In addition, it is desirable to avoid the use of these cements as a main component, because it is difficult to maintain self-leveling properties for a long time with Portland cement and white cement, which have a fairly fast hydration reaction. The blending ratio of cement and the rapid hardening self-leveling admixture is 10 to 50 parts by weight of the quick hardening self-leveling admixture with respect to 100 parts by weight of cement. If it is less than 10 parts by weight of the rapid hardening self-leveling admixture, the self-leveling performance is hardly exhibited, and if it exceeds 50 parts by weight, the curing time may be delayed.

また本発明の急硬性セルフレベリング組成物は、本発明の効果を著しく損失しない範囲で前記以外の成分を更に含むものであっても良く、例えば、モルタルやコンクリートに使用することができる収縮低減剤、膨張材、繊維、消泡剤、顔料、骨材、増粘剤、ポリマー樹脂等の混和材・剤及び水を挙げることができる。配合水量は水中でのアルカリ土類金属の亜硝酸塩や硝酸塩の濃度が3500ppm以上になるような量が望ましいが、セメント100重量部に対し水量が100重量部を超えると強度低下を起こすことがあるので好ましくない。   In addition, the rapid hardening self-leveling composition of the present invention may further contain other components as long as the effects of the present invention are not significantly lost. For example, a shrinkage reducing agent that can be used for mortar and concrete. , Expanding materials, fibers, antifoaming agents, pigments, aggregates, thickeners, polymer resins and other admixtures / agents and water. The amount of blended water is preferably such that the concentration of alkaline earth metal nitrite or nitrate in water is 3500 ppm or more, but if the amount of water exceeds 100 parts by weight, the strength may decrease. Therefore, it is not preferable.

本発明の急硬性セルフレベリング組成物の製造方法は特に限定されない。一例を示すと、前記の急硬性セルフレベリング混和剤やセメント等の水以外の使用材料を所定量を二軸ミキサなどの混合・混練機に一括投入し、適宜混合・撹拌した後、注水して1〜5分程度混練する方法を挙げることができる。   The manufacturing method of the rapid hardening self-leveling composition of this invention is not specifically limited. As an example, a predetermined amount of materials other than water, such as the rapid hardening self-leveling admixture and cement, are put into a mixing / kneading machine such as a biaxial mixer, and mixed and agitated as appropriate. Examples of the method include kneading for about 1 to 5 minutes.

以下、実施例により本発明を具体的に詳しく説明する。
[セルフレベリング混和剤の製造] 次のA1〜A4の急硬性材料、B1〜B3の減水剤、C1〜C6の粒子、D1の硼酸エステル及びE1の水溶性増粘剤から選定される材料を使用し、表1に表す配合量となるようレーディゲミキサーに使用材料を一括投入し、3分間乾式混合を行い、混和剤を作製した。
A1;亜硝酸カルシウム(市販試薬)
A2;亜硝酸マグネシウム(市販試薬)
A3;硝酸カルシウム(市販試薬)
A4;結晶質カルシウムアルミネート(12CaO・7Al23、ブレーン比表面積約4000cm2/g)
B1;ナフタレンスルホン酸系高性能減水剤(商品名「マイティ」、花王社製)
B2;メラミンスルホン酸系減水剤(商品名「メルメント」、SKW社製)
B3;ポリカルボン酸系高性能AE減水剤(商品名「コアフロー」、竹本油脂社製)
C1;ゼオライト(BET比表面積24.2m2/g、平均粒径100μm)
C2;フライアッシュ(BET比表面積2.1m2/g、平均粒径18μm)
C3;珪石微粉(BET比表面積2.7m2/g、平均粒径7μm)
C4;フライアッシュ(BET比表面積1.0m2/g、平均粒径20μm)
C5;シリカフューム(BET比表面積24.2m2/g、平均粒径0.2μm)
C6;ポリテトラフルオロエチレン粒子(BET比表面積4.1m2/g、平均粒径5μm、関東化学社製)
D1;ボリオキシエチレンビスグリセロールボレイト
E1;メチルセルロース系増粘剤(商品名「メトローズ」、信越化学工業社製)
Hereinafter, the present invention will be described in detail by way of examples.
[Production of self-leveling admixture] A material selected from the following A1 to A4 rapid hardening materials, B1 to B3 water reducing agents, C1 to C6 particles, D1 borate esters and E1 water-soluble thickeners is used. Then, the materials to be used were put all at once into the Ladige mixer so that the blending amounts shown in Table 1 were obtained, and dry mixing was performed for 3 minutes to prepare an admixture.
A1: Calcium nitrite (commercially available reagent)
A2: Magnesium nitrite (commercially available reagent)
A3: Calcium nitrate (commercially available reagent)
A4: crystalline calcium aluminate (12CaO · 7Al 2 O 3 , Blaine specific surface area of about 4000 cm 2 / g)
B1: Naphthalenesulfonic acid-based high-performance water reducing agent (trade name “Mighty”, manufactured by Kao Corporation)
B2: Melamine sulfonic acid water reducing agent (trade name “Melment”, manufactured by SKW)
B3: Polycarboxylic acid-based high-performance AE water reducing agent (trade name “Core Flow”, manufactured by Takemoto Yushi Co., Ltd.)
C1: Zeolite (BET specific surface area 24.2 m 2 / g, average particle size 100 μm)
C2: fly ash (BET specific surface area 2.1 m 2 / g, average particle size 18 μm)
C3: Silica fine powder (BET specific surface area 2.7 m 2 / g, average particle size 7 μm)
C4: fly ash (BET specific surface area 1.0 m 2 / g, average particle size 20 μm)
C5: silica fume (BET specific surface area of 24.2 m 2 / g, average particle size of 0.2 μm)
C6: polytetrafluoroethylene particles (BET specific surface area 4.1 m 2 / g, average particle size 5 μm, manufactured by Kanto Chemical Co., Inc.)
D1; Polyoxyethylene bisglycerol borate E1; Methylcellulose thickener (trade name “Metroze”, manufactured by Shin-Etsu Chemical Co., Ltd.)

Figure 2006182608
Figure 2006182608

[セルフレベリング組成物の製造] 表1に表すM1〜M9及びM11〜M14の混和剤、普通ポルトランドセメント(太平洋セメント社製)、細骨材(北海道上磯産石灰石砕砂、F.M.=2.63)、消泡剤(商品名「SND」、サンノプコ社製)及びオキシカルボン酸塩系凝結遅延剤(商品名「ジェットセッター」、太平洋マテリアル社製)から選定した材料を、10℃に保った恒温室内で表2に表す配合量となるよう強制二軸練りミキサに一括投入し、混合しながら表2に表す量の水を加え、計約5分間の連続混合を行い、セルフレベリング組成物(本発明品S1〜S10、参考品S11〜S15)を得た。   [Production of self-leveling composition] Admixtures of M1 to M9 and M11 to M14 shown in Table 1, ordinary Portland cement (manufactured by Taiheiyo Cement), fine aggregate (crushed limestone from Hokkaido Kamiso, FM = 2. 63), a material selected from an antifoaming agent (trade name “SND”, manufactured by San Nopco) and an oxycarboxylate-based setting retarder (trade name “Jet Setter”, manufactured by Taiheiyo Materials Co., Ltd.) was kept at 10 ° C. Into a constant temperature room, add the amount of water shown in Table 2 to the forced biaxial kneading mixer at a time so that the blending amount shown in Table 2 is obtained, add the amount of water shown in Table 2 while mixing, and continuously mix for about 5 minutes. Invention products S1 to S10 and reference products S11 to S15) were obtained.

Figure 2006182608
Figure 2006182608

[セルフレベリング性能を始めとする特性評価] 各組成物(S1〜S15)のフロー(落下無し)を、JIS R 5201の試験方法に準じて、混合終了直後、混合終了から1、2及び3時間経過時点で測定し、セルフレベリング性能の維持能力を評価した。また、組成物をコンクリート板上に10mm厚で打設し、上島製作所製スプリング式硬度計で、混練終了時点から24時間後の表面硬度を測定した。以上の測定は10℃に保った恒温室内で行ったが、一部の組成物(S10)についてはその混合から測定まで5℃に保った恒温室内で行った。これらの結果を表3に表す。また、混合終了から3時間経過時点の組成物は、材料分離抑止性の評価として、目視でブリージング水発生状況を確認した。ブリージング水が全く見られなかったものを材料分離抑止性「有」とし、これ以外の状況となったものは材料分離抑止性「無」と評価した。以上の結果を表3に表す。   [Characteristic evaluation including self-leveling performance] According to the test method of JIS R 5201, the flow of each composition (S1 to S15) was immediately after mixing, 1, 2, and 3 hours from the end of mixing. It measured at the time of progress, and the maintenance ability of the self-leveling performance was evaluated. The composition was cast on a concrete plate with a thickness of 10 mm, and the surface hardness after 24 hours from the end of kneading was measured with a spring type hardness meter manufactured by Ueshima Seisakusho. Although the above measurement was performed in a temperature-controlled room maintained at 10 ° C., some of the compositions (S10) were performed in a temperature-controlled room maintained at 5 ° C. from mixing to measurement. These results are shown in Table 3. In addition, the composition at the time when 3 hours had elapsed from the end of mixing was visually confirmed as to the generation of breathing water as an evaluation of the material separation inhibition property. Those having no breathing water were evaluated as having a material separation inhibitory property “Yes”, and those other than this were evaluated as having a material separation inhibitory property “None”. The above results are shown in Table 3.

Figure 2006182608
Figure 2006182608

表3より、本発明の混和剤を使用したセルフレベリング組成物は何れも配合混練から1時間以上経過してもフロー値の低下が極めて少ないことから安定してセルフレベリング性能を維持することができると共に、凝結時間が短いことから、材料分離が十分抑止できていることがわかる。しかも、このような性状は低温使用下でも発揮させることができる。   From Table 3, the self-leveling composition using the admixture of the present invention can maintain the self-leveling performance stably because any decrease in the flow value is extremely small even after 1 hour or more has passed since the mixing and kneading. In addition, since the setting time is short, it can be seen that the material separation can be sufficiently suppressed. Moreover, such properties can be exhibited even at low temperatures.

Claims (3)

アルカリ土類金属の亜硝酸塩又は硝酸塩と、減水剤と、水に不活性且つ不溶性でBET比表面積が2〜35m2/gの親水性粒子を含有してなる急硬性セルフレベリング混和剤。 A rapid hardening self-leveling admixture comprising nitrite or nitrate of an alkaline earth metal, a water reducing agent, and hydrophilic particles that are inert and insoluble in water and have a BET specific surface area of 2 to 35 m 2 / g. 更に硼酸エステルを含有してなる請求項1記載の急硬性セルフレベリング混和剤。 The rapid hardening self-leveling admixture according to claim 1, further comprising a boric acid ester. 請求項1又は2記載の急硬性セルフレベリング混和剤とセメントを含有してなる急硬性セルフレベリング組成物。 A rapid hardening self-leveling composition comprising the rapid hardening self-leveling admixture according to claim 1 or 2 and cement.
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Cited By (5)

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KR101042817B1 (en) 2011-02-18 2011-06-20 대림산업 주식회사 Compound for concrete ionization & environmental-law carbon concrete composition containing the same
JP2016124760A (en) * 2015-01-05 2016-07-11 太平洋マテリアル株式会社 Non-dispersible underwater concrete composition and hardened body thereof, and method for producing non-dispersible underwater concrete
JP2018076190A (en) * 2016-11-07 2018-05-17 太平洋マテリアル株式会社 Cement composition and production method thereof
JP2019127693A (en) * 2018-01-22 2019-08-01 鹿島道路株式会社 Mortar material and long member installation method using the same
JP2020001969A (en) * 2018-06-28 2020-01-09 宇部興産株式会社 Admixture for mortar and concrete, cement composition, mortar composition and concrete composition each including the admixture, and manufacturing methods of mortar cured article and concrete cured article

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001019527A (en) * 1999-07-05 2001-01-23 Kajima Corp Concrete using coal gasification fly ash

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001019527A (en) * 1999-07-05 2001-01-23 Kajima Corp Concrete using coal gasification fly ash

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KR101042817B1 (en) 2011-02-18 2011-06-20 대림산업 주식회사 Compound for concrete ionization & environmental-law carbon concrete composition containing the same
JP2016124760A (en) * 2015-01-05 2016-07-11 太平洋マテリアル株式会社 Non-dispersible underwater concrete composition and hardened body thereof, and method for producing non-dispersible underwater concrete
JP2018076190A (en) * 2016-11-07 2018-05-17 太平洋マテリアル株式会社 Cement composition and production method thereof
JP2019127693A (en) * 2018-01-22 2019-08-01 鹿島道路株式会社 Mortar material and long member installation method using the same
JP7041529B2 (en) 2018-01-22 2022-03-24 鹿島道路株式会社 Communication cable installation method
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JP7047634B2 (en) 2018-06-28 2022-04-05 宇部興産株式会社 A method for producing an admixture for mortar / concrete, a cement composition containing the same, a mortar composition and a concrete composition, and a hardened mortar and a hardened concrete.

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