JP5598050B2 - Self-flowing hydraulic composition - Google Patents
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Description
本発明は、主に一般建築物の床下地及び床仕上げ材等に使用することができる自己流動性水硬性組成物に関する。 The present invention relates to a self-flowing hydraulic composition that can be used mainly for floor foundations and floor finishing materials of general buildings.
セルフレベリング性の自己流動性水硬性組成物として、特許文献１にアルミナセメント、ポルトランドセメント、石膏、高炉スラグからなる水硬性成分と、リチウム塩とホウ酸化合物よりなる凝結調整剤と、減水剤と、増粘剤とからなる組成物が開示されている。また、特許文献２には、アルミナセメント、ポルトランドセメント、石膏、高炉スラグからなる水硬性成分と、減水剤と、増粘剤とからなる組成物が開示されている。また、特許文献３には、水硬性成分、細骨材、流動化剤及び増粘剤を含む自己流動性水硬性組成物であり、水硬性成分は、アルミナセメント、ポルトランドセメント及び石膏からなり、増粘剤は、ヒドロキシエチルメチルセルロースを含むことを特徴とする自己流動性水硬性組成物が開示されている。 As a self-flowing hydraulic composition having self-leveling properties, Patent Document 1 discloses a hydraulic component composed of alumina cement, Portland cement, gypsum, blast furnace slag, a setting regulator composed of a lithium salt and a boric acid compound, a water reducing agent, A composition comprising a thickener is disclosed. Patent Document 2 discloses a composition comprising a hydraulic component composed of alumina cement, Portland cement, gypsum, and blast furnace slag, a water reducing agent, and a thickening agent. Patent Document 3 is a self-flowing hydraulic composition containing a hydraulic component, fine aggregate, a fluidizing agent and a thickening agent, and the hydraulic component is composed of alumina cement, Portland cement and gypsum, A self-flowing hydraulic composition is disclosed wherein the thickener comprises hydroxyethyl methylcellulose.
本発明は、水平レベル及び表面の平坦性に優れる硬化物を得るための、セルフレベリング性の水硬性組成物を提供することを目的とする。 An object of the present invention is to provide a self-leveling hydraulic composition for obtaining a cured product excellent in horizontal level and surface flatness.
本発明は、水硬性成分、細骨材、流動化剤及び増粘剤を含む自己流動性水硬性組成物であり、高粘度増粘剤及び低粘度増粘剤からなり、Ｂ型粘度計を用いて２０℃で測定した２質量％水溶液における粘度が、高粘度増粘剤では１５０００〜３０００００ｍＰａ・ｓ、低粘度増粘剤では２５〜４００ｍＰａ・ｓであり、高粘度増粘剤と低粘度増粘剤との質量比率が、高粘度増粘剤：低粘度増粘剤＝２０：８０〜８０：２０である、自己流動性水硬性組成物である。本発明の自己流動性水硬性組成物を用いるならば、水平レベル性及び表面の平坦性に優れる硬化物を得ることができる。 The present invention is a self-flowing hydraulic composition containing a hydraulic component, fine aggregate, a fluidizing agent and a thickener, comprising a high viscosity thickener and a low viscosity thickener, and comprising a B-type viscometer. The viscosity in a 2% by weight aqueous solution measured at 20 ° C. is 15000 to 300,000 mPa · s for a high viscosity thickener and 25 to 400 mPa · s for a low viscosity thickener, and the high viscosity thickener and the low viscosity increase It is a self-flowing hydraulic composition whose mass ratio with the viscosity agent is high viscosity thickener: low viscosity thickener = 20: 80 to 80:20. If the self-flowing hydraulic composition of the present invention is used, a cured product having excellent horizontal level and surface flatness can be obtained.
本発明の自己流動性水硬性組成物の好ましい態様を以下に示す。本発明では、これらの態様を適宜組み合わせることができる。
（１）水硬性成分が、アルミナセメント、ポルトランドセメント及び石膏からなる。水硬性成分がこれらの三成分からなることにより、優れた自己流動性を有し、適正な可使時間と、優れた速硬性とを有するスラリー（モルタル）を得ることができる。
（２）水硬性成分１００質量部に対し、高粘度増粘剤及び低粘度増粘剤の合計量が０．２０〜２．０質量部である。高粘度増粘剤及び低粘度増粘剤の合計量の配合割合がこれらの範囲であることにより、水平レベル性及び表面の平坦性を確実に得ることができる。
（３）高粘度増粘剤及び低粘度増粘剤が、メチルセルロース系増粘剤である。増粘剤が、メチルセルロース系であることにより、得られるスラリー（モルタル）の高い流動性を維持したまま、高い分離抵抗性を得ることができ、表面の平坦性を確実に得ることができる。
（４）水硬性成分１００質量％中、アルミナセメント２０〜８０質量％、ポルトランドセメント５〜７０質量％及び石膏５〜４５質量％の組成である。このような組成の自己流動性水硬性組成物を用いるならば、水平レベルに優れ、水平レベル及び表面の平坦性に優れる硬化物を得ることをより確実にできる。
（５）自己流動性水硬性組成物が、さらに無機成分を含み、水硬性成分１００質量部に対し、無機成分を１０〜３５０質量部の範囲で含む。適切な量の無機成分を含むことにより、得られる硬化物の収縮が大きくなりすぎず、硬化物の強度低下を防止することができる。
（６）自己流動性水硬性組成物が、さらに凝結調整剤及び消泡剤から選ばれる成分を少なくとも１種を含む。そのため、自己流動性水硬性組成物の施工性を向上することができる。
（７）自己流動性水硬性組成物が、水硬性成分１００質量部に対し、細骨材を３０〜５００質量部の範囲で含む。そのため、自己流動性水硬性組成物のモルタルを硬化して得られる硬化物は、適切な強度を有することができる。
Preferred embodiments of the self-flowing hydraulic composition of the present invention are shown below. In the present invention, these embodiments can be appropriately combined.
(1) The hydraulic component is composed of alumina cement, Portland cement and gypsum. When the hydraulic component is composed of these three components, it is possible to obtain a slurry (mortar) having an excellent self-fluidity, an appropriate pot life and an excellent quick hardening property.
(2) The total amount of the high viscosity thickener and the low viscosity thickener is 0.20 to 2.0 parts by mass with respect to 100 parts by mass of the hydraulic component. When the blending ratio of the total amount of the high-viscosity thickener and the low-viscosity thickener is within these ranges, the horizontal level property and the surface flatness can be reliably obtained.
(3) The high viscosity thickener and the low viscosity thickener are methylcellulose thickeners. When the thickener is based on methylcellulose, high separation resistance can be obtained while maintaining high fluidity of the resulting slurry (mortar), and surface flatness can be reliably obtained.
(4) The composition of alumina cement 20 to 80% by mass, Portland cement 5 to 70% by mass and gypsum 5 to 45% by mass in 100% by mass of the hydraulic component. If a self-flowing hydraulic composition having such a composition is used, it is possible to more reliably obtain a cured product that is excellent in horizontal level and excellent in horizontal level and surface flatness.
(5) The self-flowing hydraulic composition further includes an inorganic component, and the inorganic component is included in the range of 10 to 350 parts by mass with respect to 100 parts by mass of the hydraulic component. By including an appropriate amount of the inorganic component, the shrinkage of the obtained cured product does not become too large, and the strength of the cured product can be prevented from being lowered.
(6) The self-flowing hydraulic composition further contains at least one component selected from a setting modifier and an antifoaming agent. Therefore, the workability of the self-flowing hydraulic composition can be improved.
(7) The self-flowing hydraulic composition contains fine aggregate in the range of 30 to 500 parts by mass with respect to 100 parts by mass of the hydraulic component. Therefore, the cured product obtained by curing the mortar of the self-flowing hydraulic composition can have appropriate strength.
また、本発明は、上述の自己流動性水硬性組成物と水とを混練して得られるモルタルである。このようにして得られるモルタルを用いるならば、水平レベル及び表面の平坦性に優れる硬化物を得ることができる。 Moreover, this invention is a mortar obtained by knead | mixing the above-mentioned self-flowing hydraulic composition and water. If the mortar thus obtained is used, a cured product having excellent horizontal level and surface flatness can be obtained.
本発明の自己流動性水硬性組成物を用いるならば、水平レベル及び表面の平坦性に優れる硬化物を得ることができる。 If the self-flowing hydraulic composition of the present invention is used, a cured product having excellent horizontal level and surface flatness can be obtained.
本発明の自己流動性水硬性組成物は、水硬性成分、細骨材、流動化剤及び増粘剤を含む自己流動性水硬性組成物であって、増粘剤が、所定の粘度の高粘度増粘剤及び低粘度増粘剤からなり、高粘度増粘剤と低粘度増粘剤との質量比率が所定の比率であることに特徴がある。本発明の自己流動性水硬性組成物を用いるならば、水平レベル及び表面の平坦性に優れる硬化物を得ることができる。 The self-flowing hydraulic composition of the present invention is a self-flowing hydraulic composition containing a hydraulic component, fine aggregate, a fluidizing agent and a thickening agent, wherein the thickening agent has a high viscosity. It consists of a viscosity thickener and a low viscosity thickener, and is characterized in that the mass ratio of the high viscosity thickener to the low viscosity thickener is a predetermined ratio. If the self-flowing hydraulic composition of the present invention is used, a cured product having excellent horizontal level and surface flatness can be obtained.
本明細書において、「表面の平坦性」とは、自己流動性水硬性組成物のスラリー又はモルタルを施工後の、表面の凹凸の状態を意味する。「表面の平坦性に優れる」とは、表面の凹凸が非常に少ないことを意味する。以下、本発明の自己流動性水硬性組成物について説明する。 In the present specification, the “surface flatness” means a state of unevenness on the surface after applying the slurry or mortar of the self-flowing hydraulic composition. “Excellent surface flatness” means that there are very few surface irregularities. Hereinafter, the self-flowing hydraulic composition of the present invention will be described.
本発明の自己流動性水硬性組成物に含まれる水硬性成分は、水硬性成分１００質量％中、ポルトランドセメント５〜７０質量％、アルミナセメント２０〜８０質量％及び石膏５〜４５質量％の組成、より好ましくは、水硬性成分１００質量％中、ポルトランドセメント２０〜６０質量％、アルミナセメント２５〜７０質量％及び石膏１０〜４０質量％の組成、さらに好ましくは、水硬性成分１００質量％中、ポルトランドセメント２５〜５５質量％、アルミナセメント２５〜６０質量％及び石膏１５〜３５質量％の組成、特に好ましくは、水硬性成分１００質量％中、ポルトランドセメント３０〜５０質量％、アルミナセメント２５〜４５質量％及び石膏２０〜３０質量％の組成、を用いることにより、急硬性で、低収縮性又は低膨張性で硬化中の体積変化の少ない硬化物を得られやすいために好ましい。 The hydraulic component contained in the self-flowing hydraulic composition of the present invention is composed of 5 to 70% by mass of Portland cement, 20 to 80% by mass of alumina cement, and 5 to 45% by mass of gypsum in 100% by mass of the hydraulic component. More preferably, in 100% by weight of the hydraulic component, 20-60% by weight of Portland cement, 25-70% by weight of alumina cement and 10-40% by weight of gypsum, more preferably in 100% by weight of the hydraulic component, Portland cement 25-55% by weight, alumina cement 25-25% by weight and gypsum 15-35% by weight, particularly preferably 100% by weight hydraulic component, Portland cement 30-50% by weight, alumina cement 25-45 By using a composition of 20% by mass and 20-30% by mass of gypsum, it is hard and has low shrinkage or low expansion and hardness. It preferred for volume cured product obtained easily small change in.
水硬性成分として用いられるアルミナセメントとしては、鉱物組成の異なるものが数種知られ市販されているが、いずれも主成分はモノカルシウムアルミネート（ＣＡ）であり、市販品はその種類によらず使用することができる。 Alumina cements used as hydraulic components are known and commercially available in several types with different mineral compositions, but the main component is monocalcium aluminate (CA). Can be used.
水硬性成分として用いられるポルトランドセメントとしては、普通ポルトランドセメント、早強ポルトランドセメント、超早強ポルトランドセメント、中庸熱ポルトランドセメント、低熱ポルトランドセメント及び白色ポルトランドセメントなどのポルトランドセメント並びに高炉セメント、フライアッシュセメント及びシリカセメントなどの混合セメントなどから選択して用いることができる。 Portland cement used as the hydraulic component includes ordinary Portland cement, early-strength Portland cement, ultra-early strength Portland cement, moderately hot Portland cement, low heat Portland cement and white Portland cement, and blast furnace cement, fly ash cement and It can be used by selecting from mixed cement such as silica cement.
水硬性成分として用いられる石膏としては、無水及び半水等の各石膏をその種を問わず１種又は２種以上の混合物として使用することができる。また、石膏は、フッ酸製造工程等で副産される石膏、又は天然に産出される石膏のいずれも使用することができる。石膏は、自己流動性水硬性組成物と水とを混練して得られるモルタルが硬化した後の寸法安定性を保持する成分として機能するものである。 As gypsum used as a hydraulic component, each gypsum such as anhydrous and semi-water can be used as one kind or a mixture of two or more kinds regardless of the kind. As the gypsum, either gypsum produced as a by-product in a hydrofluoric acid production process or the like, or gypsum produced in nature can be used. Gypsum functions as a component that retains dimensional stability after the mortar obtained by kneading the self-flowing hydraulic composition and water is cured.
本発明の自己流動性水硬性組成物では、水硬性成分として、アルミナセメント、ポルトランドセメント及び石膏からなる水硬性成分を用いることが、優れた自己流動性を有し、適正な可使時間と、優れた速硬性とを有する自己流動性水硬性組成物のモルタルを得ることができることから好ましい。 In the self-flowing hydraulic composition of the present invention, the use of a hydraulic component made of alumina cement, Portland cement, and gypsum as the hydraulic component has excellent self-fluidity, and an appropriate pot life. It is preferable because a mortar of a self-flowing hydraulic composition having excellent quick hardening can be obtained.
本発明の自己流動性水硬性組成物は、細骨材を含む。細骨材は、水硬性成分１００質量部に対し、好ましくは３０〜５００質量部、より好ましくは５０〜４００質量部、さらに好ましくは１００〜３００質量部、特に好ましくは１５０〜２５０質量部の範囲が好ましい。 The self-flowing hydraulic composition of the present invention contains fine aggregate. The fine aggregate is preferably 30 to 500 parts by mass, more preferably 50 to 400 parts by mass, still more preferably 100 to 300 parts by mass, and particularly preferably 150 to 250 parts by mass with respect to 100 parts by mass of the hydraulic component. Is preferred.
本発明の自己流動性水硬性組成物に含まれる細骨材としては、好ましくは粒径２ｍｍ以下の細骨材、より好ましくは粒径０．００７５〜１．５ｍｍの細骨材、さらに好ましくは粒径０．１〜１ｍｍの細骨材、特に好ましくは０．１５〜０．８５ｍｍの細骨材を主成分とすることが好ましい。細骨材の粒径は、ＪＩＳ・Ｚ−８８０１で規定される呼び寸法の異なる数個のふるいを用いて測定する。 The fine aggregate contained in the self-flowing hydraulic composition of the present invention is preferably a fine aggregate having a particle size of 2 mm or less, more preferably a fine aggregate having a particle size of 0.0075 to 1.5 mm, more preferably A fine aggregate having a particle size of 0.1 to 1 mm, particularly preferably a fine aggregate having a particle size of 0.15 to 0.85 mm, is preferred. The particle size of the fine aggregate is measured using several sieves having different nominal dimensions defined in JIS / Z-8801.
細骨材の種類は、珪砂、川砂、海砂、山砂及び砕砂などの砂類、アルミナクリンカー、シリカ粉、粘土鉱物、廃ＦＣＣ触媒及び石灰石などの無機材料、ウレタン砕、ＥＶＡフォーム及び発砲樹脂などの樹脂粉砕物などから適宜選択して用いることができる。特に細骨材としては、珪砂、川砂、海砂、山砂、砕砂などの砂類、廃ＦＣＣ触媒、石英粉末及びアルミナクリンカーなどから選択したものを好ましく用いることができる。 Fine aggregates include silica sand, river sand, sea sand, mountain sand and crushed sand, alumina clinker, silica powder, clay mineral, waste FCC catalyst and inorganic materials such as limestone, urethane crushed, EVA foam and foaming resin It can select suitably from resin pulverized materials etc., such as. In particular, as the fine aggregate, those selected from sands such as quartz sand, river sand, sea sand, mountain sand and crushed sand, waste FCC catalyst, quartz powder, alumina clinker and the like can be preferably used.
本発明の自己流動性水硬性組成物は、材料分離を抑制しつつ適度の流動性を確保するために、流動化剤（高性能減水剤などの減水剤）を含む。水硬性成分であるアルミナセメントの発現強度は、水／水硬性成分比の影響を大きく受けることから、減水効果を有する流動化剤を使用して水／水硬性成分比を小さくすることが必要である。 The self-flowing hydraulic composition of the present invention contains a fluidizing agent (a water reducing agent such as a high performance water reducing agent) in order to ensure appropriate fluidity while suppressing material separation. Since the strength of alumina cement, which is a hydraulic component, is greatly affected by the water / hydraulic component ratio, it is necessary to reduce the water / hydraulic component ratio using a fluidizing agent having a water reducing effect. is there.
流動化剤としては、減水効果を合わせ持つ、メラミンスルホン酸のホルムアルデヒド縮合物、カゼイン、カゼインカルシウム、ポリカルボン酸系、ポリエーテル系及びポリエーテルポリカルボン酸系などの市販の流動化剤が、その種類を問わず使用でき、特にポリエーテル系及びポリエーテルポリカルボン酸などの市販の流動化剤を用いることが好ましい。 As the fluidizing agent, commercially available fluidizing agents such as formaldehyde condensate of melamine sulfonic acid, casein, casein calcium, polycarboxylic acid-based, polyether-based and polyether polycarboxylic acid-based which have a water reducing effect are included. It can be used regardless of the type, and it is particularly preferable to use commercially available fluidizing agents such as polyether-based and polyether polycarboxylic acid.
流動化剤は、用いる水硬性成分に応じて、特性を損なわない範囲で適宜添加することができる。本発明の自己流動性水硬性組成物に対する流動化剤の添加量は、水硬性成分１００質量部に対して、好ましくは０．０１〜２．０質量部、より好ましくは０．０２〜１．０質量部、さらに好ましくは０．０５〜０．３質量部である。流動化剤の添加量が少なすぎると十分な効果が発現しない。また、流動化剤の添加量が多すぎても添加量に見合った効果は期待できず単に不経済であるだけでなく、場合によっては所要の流動性を得るための混練水量が増大し、同時に粘稠性も大きくなり、充填性が悪化することが考えられる。 The fluidizing agent can be appropriately added in a range that does not impair the characteristics, depending on the hydraulic component used. The amount of the fluidizing agent added to the self-flowing hydraulic composition of the present invention is preferably 0.01 to 2.0 parts by mass, more preferably 0.02 to 1. It is 0 mass part, More preferably, it is 0.05-0.3 mass part. If the added amount of the fluidizing agent is too small, sufficient effects are not exhibited. Also, if the amount of the fluidizing agent added is too large, an effect commensurate with the amount added cannot be expected and it is not only uneconomical, but in some cases the amount of kneading water for obtaining the required fluidity increases, and at the same time It is considered that the viscosity becomes large and the filling property is deteriorated.
本発明の自己流動性水硬性組成物は、高粘度増粘剤及び低粘度増粘剤からなる増粘剤を含む。本明細書において、高粘度増粘剤とは粘度が１５０００〜３０００００ｍＰａ・ｓの範囲、低粘度増粘剤とは粘度が２５〜４００ｍＰａ・ｓのものをいう。なお、本明細書において「粘度」とは、増粘剤の２質量％水溶液を、Ｂ型粘度計を用いて２０℃で測定したときの粘度をいう。粘度を測定する際のローターの種類及び回転速度は、使用する粘度計で定められた組み合わせを適宜選択する。２種類の異なった粘度の増粘剤を併用する自己流動性水硬性組成物を用いることによって、水平レベル及び表面の平坦性に優れる硬化物を得ることができる。 The self-flowing hydraulic composition of the present invention includes a thickener comprising a high viscosity thickener and a low viscosity thickener. In the present specification, the high viscosity thickener means a viscosity of 15,000 to 300,000 mPa · s, and the low viscosity thickener means a viscosity of 25 to 400 mPa · s. In the present specification, “viscosity” refers to the viscosity when a 2% by mass aqueous solution of a thickener is measured at 20 ° C. using a B-type viscometer. A combination determined by a viscometer to be used is appropriately selected as the type and rotation speed of the rotor when measuring the viscosity. By using a self-flowing hydraulic composition in which two types of thickeners having different viscosities are used in combination, a cured product having excellent horizontal level and surface flatness can be obtained.
本発明の自己流動性水硬性組成物中の高粘度増粘剤と低粘度増粘剤との質量比率（高粘度増粘剤の配合質量：低粘度増粘剤の配合質量）は、２０：８０〜８０：２０、好ましくは４０：６０〜８０：２０、より好ましくは５０：５０〜７５：２５である。高粘度増粘剤と低粘度増粘剤との質量比率が上記範囲であることにより、水平レベル及び表面の平坦性に優れる硬化物を得ることを確実にすることができる。 The mass ratio of the high-viscosity thickener and the low-viscosity thickener in the self-flowing hydraulic composition of the present invention (the blending mass of the high-viscosity thickener: the blending mass of the low-viscosity thickener) is 20: 80-80: 20, preferably 40: 60-80: 20, more preferably 50: 50-75: 25. When the mass ratio of the high-viscosity thickener to the low-viscosity thickener is in the above range, it can be ensured to obtain a cured product having excellent horizontal level and surface flatness.
高粘度増粘剤の粘度は、好ましくは１５０００〜３０００００ｍＰａ・ｓの範囲、より好ましくは２００００〜１０００００ｍＰａ・ｓの範囲、さらに好ましくは２５０００〜３５０００ｍＰａ・ｓの範囲である。また、低粘度増粘剤の粘度は、好ましくは２５〜４００ｍＰａ・ｓの範囲、より好ましくは２５〜１００ｍＰａ・ｓ、さらに好ましくは５０〜１００ｍＰａ・ｓの範囲である。増粘剤の粘度が上記範囲であることにより、本発明の自己流動性水硬性組成物によって水平レベル及び表面の平坦性に優れる硬化物を得ることを確実にすることができる。 The viscosity of the high viscosity thickener is preferably in the range of 15,000 to 300,000 mPa · s, more preferably in the range of 20000 to 100,000 mPa · s, and still more preferably in the range of 25,000 to 35000 mPa · s. The viscosity of the low viscosity thickener is preferably in the range of 25 to 400 mPa · s, more preferably in the range of 25 to 100 mPa · s, and still more preferably in the range of 50 to 100 mPa · s. When the viscosity of the thickener is within the above range, it can be ensured that a cured product having excellent horizontal level and surface flatness can be obtained by the self-flowing hydraulic composition of the present invention.
本発明の自己流動性水硬性組成物に対する増粘剤の配合量（高粘度増粘剤及び低粘度増粘剤の合計量）は、水硬性成分１００質量部に対し、０．２〜２質量部、好ましくは０．２５〜１．５質量部、より好ましくは０．３〜１．０質量部、さらに好ましくは０．４５〜０．７質量部である。増粘剤の配合量が上記範囲であることにより、水平レベル及び表面の平坦性に優れる硬化物を得ることを確実にすることができる。 The blending amount of the thickener (the total amount of the high-viscosity thickener and the low-viscosity thickener) with respect to the self-flowing hydraulic composition of the present invention is 0.2-2 mass per 100 mass parts of the hydraulic component. Parts, preferably 0.25 to 1.5 parts by mass, more preferably 0.3 to 1.0 parts by mass, and still more preferably 0.45 to 0.7 parts by mass. When the blending amount of the thickener is within the above range, it can be ensured to obtain a cured product having excellent horizontal level and surface flatness.
本発明の自己流動性水硬性組成物に含まれる高粘度増粘剤及び低粘度増粘剤は、メチルセルロース系増粘剤であることが好ましい。メチルセルロース系増粘剤は、その種類を問わず用いることができるが、特にヒドロキシエチルメチルセルロース系とヒドロキシプロピルメチルセルロース系を用いることが好ましい。増粘剤が、メチルセルロース系増粘剤であることにより、水硬性成分や細骨材などの分離抑制、気泡発生の抑制、硬化体表面の改善に好ましい効果を与え、水硬性組成物の硬化物の特性を向上させるために好ましい。 The high viscosity thickener and the low viscosity thickener contained in the self-flowing hydraulic composition of the present invention are preferably methylcellulose thickeners. The methylcellulose thickener can be used regardless of its type, but it is particularly preferable to use hydroxyethylmethylcellulose and hydroxypropylmethylcellulose. When the thickener is a methylcellulose-based thickener, it has a favorable effect on the suppression of separation of hydraulic components and fine aggregates, suppression of bubble generation, and improvement of the surface of the cured body, and the cured product of the hydraulic composition It is preferable to improve the characteristics.
本発明の自己流動性水硬性組成物は、必要に応じてさらに高炉スラグ、フライアッシュ及び／又はシリカなどの無機成分を含むことができる。本発明の自己流動性水硬性組成物は、特に高炉スラグを含むことにより、乾燥収縮による硬化体の耐クラック性を高めることができる。本発明の自己流動性水硬性組成物において、無機成分の添加量は、水硬性成分１００質量部に対し、好ましくは１０〜３５０質量部、より好ましくは３０〜２００質量部、さらに好ましくは５０〜１５０質量部、特に好ましくは７０〜１３０質量部とすることが好ましい。無機成分（高炉スラグ）の添加量が少なすぎると収縮が大きくなり、多すぎると強度低下を招くことがある。高炉スラグは、ＪＩＳ・Ａ−６２０６：１９９７に規定されるブレーン比表面積３０００ｃｍ２／ｇ以上のものを用いることができる。 The self-flowing hydraulic composition of the present invention can further contain an inorganic component such as blast furnace slag, fly ash and / or silica, if necessary. The self-flowing hydraulic composition of the present invention can enhance the crack resistance of the cured product due to drying shrinkage, particularly by including blast furnace slag. In the self-flowing hydraulic composition of the present invention, the added amount of the inorganic component is preferably 10 to 350 parts by mass, more preferably 30 to 200 parts by mass, and still more preferably 50 to 100 parts by mass with respect to 100 parts by mass of the hydraulic component. 150 parts by mass, particularly preferably 70 to 130 parts by mass is preferable. If the added amount of the inorganic component (blast furnace slag) is too small, the shrinkage becomes large, and if it is too large, the strength may be lowered. As the blast furnace slag, a blast furnace slag having a specific surface area of 3000 cm 2 / g or more specified in JIS A-6206: 1997 can be used.
本発明の自己流動性水硬性組成物に用いる水硬性成分や水硬性組成物に応じて、特性を損なわない範囲で凝結調整剤（凝結促進剤及び凝結遅延剤）を適宜添加することができる。凝結促進剤及び凝結遅延剤の成分、添加量及び混合比率を適宜選択することにより、水硬性組成物の可使時間を調整することができ、セルフレベリング材としての使用が非常に容易になる。凝結調整剤、すなわち、凝結促進剤及び凝結遅延剤の合計量は、水硬性成分１００質量部に対して０．０５〜５質量部、さらに０．１〜２質量部、特に０．３０〜１．５質量部の範囲で添加することが好ましい。 Depending on the hydraulic component or hydraulic composition used in the self-flowing hydraulic composition of the present invention, a setting regulator (setting accelerator and setting retarder) can be added as appropriate within a range that does not impair the characteristics. By appropriately selecting the components, the addition amount and the mixing ratio of the setting accelerator and the setting retarder, the pot life of the hydraulic composition can be adjusted, and the use as a self-leveling material becomes very easy. The total amount of the setting modifier, that is, the setting accelerator and the setting retarder is 0.05 to 5 parts by mass, more preferably 0.1 to 2 parts by mass, particularly 0.30 to 1 with respect to 100 parts by mass of the hydraulic component. It is preferable to add in the range of 5 parts by mass.
凝結促進剤としては、公知の凝結を促進する成分を用いることができる。例えば、凝結促進剤として、凝結促進の性質を有するリチウム塩を用いることができる。 As the setting accelerator, a known component for promoting setting can be used. For example, as the setting accelerator, a lithium salt having a setting acceleration property can be used.
本発明の自己流動性水硬性組成物に添加することができるリチウム塩の一例として、炭酸リチウム、塩化リチウム、硫酸リチウム、硝酸リチウム及び水酸化リチウムなどの無機リチウム塩、並びにシュウ酸リチウム、酢酸リチウム、酒石酸リチウム、リンゴ酸リチウム及びクエン酸リチウムなどの有機酸有機リチウム塩などを挙げることができる。これらのリチウム塩を単独で又は２種以上のリチウム塩を併用して用いることができる。特に炭酸リチウムは、凝結促進効果、入手容易性及び価格の面から好ましい。 Examples of lithium salts that can be added to the self-flowing hydraulic composition of the present invention include inorganic lithium salts such as lithium carbonate, lithium chloride, lithium sulfate, lithium nitrate and lithium hydroxide, and lithium oxalate and lithium acetate. And organic acid organic lithium salts such as lithium tartrate, lithium malate, and lithium citrate. These lithium salts can be used alone or in combination of two or more lithium salts. In particular, lithium carbonate is preferable from the viewpoint of the setting acceleration effect, availability, and cost.
凝結促進剤として、上述のリチウム塩とともに、硫酸アルミニウムを併用して用いることが、凝結促進効果の点から好ましい。 As the setting accelerator, it is preferable to use aluminum sulfate in combination with the above lithium salt from the viewpoint of the setting acceleration effect.
凝結遅延剤としては、公知の凝結遅延剤を用いることができる。本発明の自己流動性水硬性組成物に添加することができる凝結遅延剤の一例として、酒石酸類、リンゴ酸類、クエン酸類及びグルコン酸類などのオキシカルボン酸類を代表とする有機酸、並びに硫酸ナトリウム、重炭酸ナトリウム、リン酸ナトリウム、ポリリン酸ナトリウム及びトリポリリン酸ナトリウムなどの無機ナトリウム塩類などを挙げることができる。これらの凝結遅延剤を単独で又は２種以上の成分を併用して用いることができる。 As the setting retarder, a known setting retarder can be used. Examples of setting retarders that can be added to the self-flowing hydraulic composition of the present invention include organic acids typified by oxycarboxylic acids such as tartaric acids, malic acids, citric acids and gluconic acids, and sodium sulfate, Examples thereof include inorganic sodium salts such as sodium bicarbonate, sodium phosphate, sodium polyphosphate and sodium tripolyphosphate. These setting retarders can be used alone or in combination of two or more components.
オキシカルボン酸類は、オキシカルボン酸及びこれらの塩を含む。本発明の自己流動性水硬性組成物に添加することができるオキシカルボン酸としては、例えばクエン酸、グルコン酸、酒石酸、グリコール酸、乳酸、ヒドロアクリル酸、α−オキシ酪酸、グリセリン酸、タルトロン酸、リンゴ酸などの脂肪族オキシ酸、サリチル酸、ｍ−オキシ安息香酸、ｐ−オキシ安息香酸、没食子酸、マンデル酸及びトロパ酸等の芳香族オキシ酸等を挙げることができる。 Oxycarboxylic acids include oxycarboxylic acids and their salts. Examples of the oxycarboxylic acid that can be added to the self-flowing hydraulic composition of the present invention include citric acid, gluconic acid, tartaric acid, glycolic acid, lactic acid, hydroacrylic acid, α-oxybutyric acid, glyceric acid, and tartronic acid. And aliphatic oxyacids such as malic acid, salicylic acid, m-oxybenzoic acid, p-oxybenzoic acid, gallic acid, mandelic acid and tropic acid.
オキシカルボン酸の塩としては、例えばオキシカルボン酸のアルカリ金属塩（具体的にはナトリウム塩及びカリウム塩など）及びアルカリ土類金属塩（具体的にはカルシウム塩、バリウム塩及びマグネシウム塩など）などを挙げることができ、ナトリウム塩を用いることが好ましい。また、特に、重炭酸ナトリウム及び酒石酸ナトリウムが、凝結遅延効果、入手容易性、価格の面から好ましく、これらを併用することが、さらに好ましい。 Examples of the oxycarboxylic acid salt include alkali metal salts (specifically sodium salt and potassium salt) of oxycarboxylic acid and alkaline earth metal salts (specifically calcium salt, barium salt and magnesium salt). The sodium salt is preferably used. In particular, sodium bicarbonate and sodium tartrate are preferable from the standpoints of setting delay effect, availability, and cost, and it is more preferable to use these in combination.
本発明の自己流動性水硬性組成物に含まれる消泡剤は、シリコン系、アルコール系及び／又はポリエーテル系などの合成物質及び／又は植物由来の天然物質など、公知のものを用いることができる。 As the antifoaming agent contained in the self-flowing hydraulic composition of the present invention, known materials such as synthetic materials such as silicon-based, alcohol-based and / or polyether-based materials and / or natural materials derived from plants may be used. it can.
本発明の自己流動性水硬性組成物に対する消泡剤の添加は、本発明の特性を損なわない範囲で行うことができる。本発明の自己流動性水硬性組成物に対する消泡剤の添加量は、水硬性成分１００質量部に対して、好ましくは０．００１〜２質量部、より好ましくは０．００５〜１．５質量部、さらに好ましくは０．０１〜１質量部、特に０．０２〜０．５質量部含むことが好ましい。消泡剤の添加量が上記範囲内であることにより、消泡剤による消泡効果を認めることができる。 Addition of the antifoaming agent to the self-flowing hydraulic composition of the present invention can be performed within a range not impairing the characteristics of the present invention. The amount of the antifoaming agent added to the self-flowing hydraulic composition of the present invention is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 1.5 parts by mass with respect to 100 parts by mass of the hydraulic component. Part, more preferably 0.01 to 1 part by weight, particularly preferably 0.02 to 0.5 part by weight. When the addition amount of the antifoaming agent is within the above range, the antifoaming effect by the antifoaming agent can be recognized.
増粘剤及び消泡剤を併用して用いることは、水硬性成分や細骨材などの骨材分離の抑制、気泡発生の抑制及び硬化体表面の改善に好ましい効果を与え、水硬性組成物の硬化物の特性を向上させるために好ましい。 The combined use of a thickener and an antifoaming agent has a favorable effect in suppressing separation of aggregates such as hydraulic components and fine aggregates, suppression of bubble generation, and improvement of the surface of the cured body. It is preferable for improving the properties of the cured product.
本発明の自己流動性水硬性組成物は、必要に応じてリチウム塩、酒石酸塩及び重炭酸塩を除く他の凝結調整剤及び消泡剤などを、本発明の自己流動性水硬性組成物の特性を損なわない範囲で添加することができる。 The self-flowing hydraulic composition of the present invention may contain other setting modifiers and antifoaming agents, excluding lithium salts, tartrate and bicarbonate, as necessary. It can add in the range which does not impair a characteristic.
自己流動性水硬性組成物を構成する好適な成分は、アルミナセメント、ポルトランドセメント及び石膏からなる水硬性成分、高炉スラグの無機成分、硅砂などの細骨材、流動化剤、所定の粘度のメチルセルロース系高粘度増粘剤及びメチルセルロース系低粘度増粘剤、消泡剤並びに凝結調整剤を含むものである。 Suitable components constituting the self-flowing hydraulic composition are: a hydraulic component made of alumina cement, Portland cement and gypsum, an inorganic component of blast furnace slag, fine aggregates such as cinnabar, a fluidizing agent, methylcellulose having a predetermined viscosity System high viscosity thickener, methylcellulose type low viscosity thickener, antifoaming agent and setting modifier.
本発明の自己流動性水硬性組成物のプレミックス粉体は、水硬性成分、細骨材、流動化剤及び所定の増粘剤並びに必要に応じて配合する無機成分、凝結調整剤、消泡剤及び樹脂粉などを混合機で混合することによって得ることができる。自己流動性水硬性組成物のプレミックス粉体は、所定量の水と混合、攪拌して、スラリー状のセルフレベリング性を有するモルタルを製造することができる。このようにして得られるモルタルを所定の場所に施工し、硬化させることにより、自己流動性水硬性組成物の硬化物を得ることができる。 The premix powder of the self-fluid hydraulic composition of the present invention comprises a hydraulic component, a fine aggregate, a fluidizing agent, a predetermined thickening agent, and an inorganic component, a coagulation adjusting agent, and an antifoaming agent as necessary. It can be obtained by mixing an agent and resin powder with a mixer. The premix powder of the self-flowing hydraulic composition can be mixed with a predetermined amount of water and stirred to produce a mortar having a slurry-like leveling property. The cured product of the self-fluid hydraulic composition can be obtained by applying the mortar thus obtained in a predetermined place and curing it.
自己流動性水硬性組成物と、水とを混練してモルタルを製造することができる。自己流動性水硬性組成物に対する水の添加量を調整することにより、流動性、可使時間、材料分離及び硬化体の強度などを調整することができる。水の添加量は、自己流動性水硬性組成物１００質量部に対し、好ましくは１０〜４０質量部、より好ましくは１４〜３４質量部、さらに好ましくは１８〜３０質量部、特に好ましくは２２〜２８質量部加えて用いることが好ましい。 A mortar can be produced by kneading a self-fluid hydraulic composition and water. By adjusting the amount of water added to the self-flowing hydraulic composition, the fluidity, pot life, material separation, and strength of the cured product can be adjusted. The amount of water added is preferably 10 to 40 parts by mass, more preferably 14 to 34 parts by mass, still more preferably 18 to 30 parts by mass, and particularly preferably 22 to 100 parts by mass with respect to 100 parts by mass of the self-flowing hydraulic composition. It is preferable to add 28 parts by mass.
自己流動性水硬性組成物は、公知の方法でセルフレベリング材として施工することができる。例えば施工の一例として、特開２００１−０４０８６２号公報などに開示されている。 The self-flowing hydraulic composition can be applied as a self-leveling material by a known method. For example, it is disclosed by Unexamined-Japanese-Patent No. 2001-040862 etc. as an example of construction.
本発明の自己流動性水硬性組成物は、水と混合した後のフロー値が、好ましくは１９０〜２６０ｍｍ、より好ましくは２００〜２４０ｍｍ、さらに好ましくは２１０〜２３０ｍｍに調整されていることが好ましい。フロー値がこの範囲にある場合には、施工が容易であり、平滑性の高い硬化体表面を得られやすいためである。 In the self-flowing hydraulic composition of the present invention, the flow value after mixing with water is preferably adjusted to 190 to 260 mm, more preferably 200 to 240 mm, and still more preferably 210 to 230 mm. This is because, when the flow value is within this range, the construction is easy and it is easy to obtain a cured body surface with high smoothness.
本発明の自己流動性水硬性組成物をセルフレベリング材として用いる場合は、水平レベル及び表面の平坦性に優れる硬化物を得ることができるので、床下地や、工場、倉庫、駐車場、ガソリンスタンド、厨房及びマンション等における床仕上げ材に用いることができる。 When the self-flowing hydraulic composition of the present invention is used as a self-leveling material, a cured product having excellent horizontal level and surface flatness can be obtained, so that it is possible to obtain a floor base, a factory, a warehouse, a parking lot, and a gas station. It can be used for flooring materials in kitchens and apartments.
以下、本発明を実施例に基づき、さらに詳細に説明する。但し、本発明は下記実施例により制限されるものでない。 Hereinafter, the present invention will be described in more detail based on examples. However, the present invention is not limited by the following examples.
（１）モルタルの評価：評価に用いるモルタルは、自己流動性水硬性組成物と水とを混練し、混練直後のモルタルを用いた。モルタルのセルフレベリング性を、フロー値及びＳＬ値を測定することにより評価した。セルフレベリング性の評価条件は、温度３０℃、湿度６５％の環境下で行った。 (1) Evaluation of mortar: As the mortar used for evaluation, a self-flowing hydraulic composition and water were kneaded, and the mortar immediately after kneading was used. The self-leveling property of the mortar was evaluated by measuring the flow value and the SL value. The self-leveling property was evaluated under an environment of a temperature of 30 ° C. and a humidity of 65%.
・フロー値
フロー値は、ＪＡＳＳ・１５Ｍ−１０３に準拠して測定する。厚さ５ｍｍのみがき板ガラスの上に内径５０ｍｍ、高さ５１ｍｍの塩化ビニル製パイプ（内容積１００ｍｌ）を置き、練り混ぜた水硬性モルタル組成物を充填した後、パイプを引き上げる。広がりが静止した後、直角２方向の直径を測定し、その平均値をフロー値とする。
-Flow value A flow value is measured based on JASS * 15M-103. A pipe made of vinyl chloride having an inner diameter of 50 mm and a height of 51 mm (internal volume: 100 ml) is placed on a glass sheet having a thickness of 5 mm, filled with the kneaded hydraulic mortar composition, and then the pipe is pulled up. After the spread has stopped, the diameters in two perpendicular directions are measured, and the average value is taken as the flow value.
・ＳＬ値
ＳＬ値の測定は、次のように行う。図１に示すＳＬ測定器を使用し、幅３０ｍｍ×高さ３０ｍｍ×長さ７５０ｍｍのレールに、先端より長さ１５０ｍｍのところに堰板を設け、混練直後のモルタルを所定量満たして成形する。成形直後に堰板を引き上げて、モルタルの流れの停止後に、標点（堰板の設置部）からモルタル流れの最短部までの距離を測定し、その値（ＳＬ値）をＬ０とし、堰板より２００ｍｍ流れる時間を測定し、その測定時間をＳＬ流動時間（Ｌ０）（秒／２００ｍｍ）とする。
• SL value The SL value is measured as follows. Using the SL measuring device shown in FIG. 1, a barrier plate is provided on a rail having a width of 30 mm, a height of 30 mm and a length of 750 mm at a length of 150 mm from the tip, and a mortar immediately after kneading is filled with a predetermined amount and molded. Immediately after forming, the weir plate is pulled up, and after the mortar flow is stopped, the distance from the gauge point (the installation portion of the dam plate) to the shortest portion of the mortar flow is measured, and the value (SL value) is set to L0 The time for 200 mm is measured, and the measurement time is defined as SL flow time (L0) (seconds / 200 mm).
同様に成形後２０分後に堰板を引き上げて、モルタルの流れの停止後に、標点（堰板の設置部）からモルタル流れの最短部までの距離を測定し、その値（ＳＬ値）をＬ２０とする。また、堰板より２００ｍｍ流れる時間を測定し、その測定時間をＳＬ流動時間（Ｌ２０）（秒／２００ｍｍ）とする。 Similarly, after 20 minutes after molding, the weir plate is pulled up, and after the mortar flow is stopped, the distance from the gage (installed portion of the weir plate) to the shortest portion of the mortar flow is measured, and the value (SL value) is set to L20. And Moreover, the time which flows 200 mm from a weir board is measured, and the measurement time is made into SL flow time (L20) (second / 200mm).
・水引時間
調製したモルタルを、１３ｃｍ×１９ｃｍの樹脂製の型枠へ厚さ１５ｍｍで流し込んだ後、凝結開始に伴いモルタル表面水が消失（光の反射が失われ曇った状態）した時間を水引時間とした。
-Watering time After pouring the prepared mortar into a 13cm x 19cm resin mold at a thickness of 15mm, the time when the mortar surface water disappeared (light reflection was lost and became cloudy) with the start of condensation was drawn. It was time.
・ショア硬度
水硬性モルタル打設後からの所定の経過時間の後に、硬化した表面の硬度をスプリング式硬度計タイプＤ型（（株）上島製作所製）を用いて、任意の４カ所の表面硬度を測定し、そのスプリング式硬度計タイプＤ型のゲージの読み取り値の平均値をその時間の表面硬度とした。本発明の実施例、参考例及び比較例の場合は、２時間後のショア硬度を測定した。
・ Shore hardness After a predetermined elapsed time from the placement of the hydraulic mortar, the hardness of the hardened surface is determined by using a spring type hardness meter type D (manufactured by Ueshima Seisakusho Co., Ltd.) at any four locations. The average value of the readings of the spring type hardness tester type D gauge was defined as the surface hardness at that time. In the case of Examples , Reference Examples and Comparative Examples of the present invention, the Shore hardness after 2 hours was measured.
（２）硬化物の表面状態評価（ショア硬度、凹凸、表面粉化）
得られるモルタルを、１３ｃｍ×１９ｃｍの樹脂製の型枠へ厚さ１５ｍｍで流し込み、硬化終了後、表面状態の評価を行った。硬化表面状態の評価条件は、温度３０℃、湿度６５％の環境下で行った。
(2) Surface condition evaluation of cured product (Shore hardness, irregularities, surface powdering)
The obtained mortar was poured into a 13 cm × 19 cm resin mold with a thickness of 15 mm, and the surface condition was evaluated after curing was completed. The evaluation conditions of the cured surface state were performed in an environment of a temperature of 30 ° C. and a humidity of 65%.
・表面状態の評価
表面状態の評価は、水硬性モルタル打設後からの所定の経過時間の後に、目視又は指で触れて、凹凸及び粉化の程度を評価した。「凹凸」とは、表面に存在する、幅が数ｍｍから数十ｍｍ、厚さが数ｍｍ程度のでこぼこである。「粉化」とは、表面に白い粉が析出している状態又は指で軽く擦った程度で表層部が粉状になる状態である。凹凸の評価は以下の通り、表面の凹凸の存在が、目視で分かる場合を１、目視では十分に分からないが指で触れてはっきり分かる場合を２、指で触れて分かる場合を３、指で触れてわずかに分かる場合を４、指で触れても分からない場合を５とし、５段階評価で行った。粉化の評価は以下の通り、目視で粉の析出が分かる場合を１、指で軽くこすると表層部が粉状になる場合を２、指でこすると表層部が粉状になる場合を３、指で強くこすると表層部が粉状になる場合を４、指でこすっても表層部が粉状にならない場合を５とし、５段階評価で行った。本発明の実施例、参考例及び比較例の場合は、モルタル打設から２４時間後に評価した。
-Evaluation of surface condition Evaluation of the surface condition evaluated the unevenness | corrugation and the degree of powdering by touching visually or with a finger after the predetermined elapsed time after placing hydraulic mortar. “Unevenness” is a bump that is present on the surface and has a width of several millimeters to several tens of millimeters and a thickness of several millimeters. “Powdering” is a state in which white powder is deposited on the surface, or a state in which the surface layer portion becomes powdery when lightly rubbed with a finger. The evaluation of the unevenness is as follows: 1 if the presence of surface unevenness can be visually confirmed, 2 if it is clearly visible by touching with a finger but not clearly visible, 3 if touched by a finger, 3 The evaluation was performed in a five-step evaluation, where 4 was a slight case when touched and 5 was a case where it was not known even when touched with a finger. The evaluation of pulverization is as follows: 1 when the precipitation of powder can be visually observed, 2 when the surface layer becomes powdery when rubbed lightly with a finger, and 3 when the surface layer becomes powdery when rubbed with a finger The case where the surface layer portion became powdery when rubbed strongly with a finger was 4, and the case where the surface layer portion did not become powdery when rubbed with a finger was made 5 in a five-step evaluation. In the case of Examples , Reference Examples and Comparative Examples of the present invention, evaluation was made 24 hours after mortar placement.
原料は以下のものを使用した。
（１）水硬性成分
・アルミナセメント（フォンジュ、ラファージュアルミネート社製、ブレーン比表面積３１００ｃｍ２／ｇ）。
・ポルトランドセメント（早強セメント、宇部三菱セメント社製、ブレーン比表面積４５００ｃｍ２／ｇ）。
・石膏：ＩＩ型無水石膏（セントラル硝子社製、ブレーン比表面積３４６０ｃｍ２／ｇ）。
（２）細骨材
・珪砂Ａ：６号珪砂。
・珪砂Ｂ：７号珪砂。
（３）無機成分
・高炉スラグ（リバーメント、千葉リバーメント社製、ブレーン比表面積４４００ｃｍ２／ｇ）。
（４）凝結調整剤
・重炭酸Ｎａ：重炭酸ナトリウム（東ソー社製）。
・酒石酸Ｎａ：Ｌ−酒石酸ナトリウム（扶桑化学工業社製）。
・炭酸Ｌｉ：（本荘ケミカル社製）。
・硫酸Ａｌ：（大明化学工業）。
（５）流動化剤
・流動化剤：ポリカルボン酸系流動化剤（花王社製）。
（６）増粘剤
・増粘剤Ａ：ヒドロキシエチルメチルセルロース系増粘剤（マーポローズＭＸ−３００００、松本油脂製薬社製、粘度：２７０００〜２９０００ｍＰａ・ｓ）。
・増粘剤Ｂ：ヒドロキシプロピルメチルセルロース系増粘剤（メトローズＦＯＮ-５０、信越化学工業社製、粘度：５０ｍＰａ・ｓ）。
なお、粘度は、上記増粘剤の２質量％水溶液を、Ｂ型粘度計を用いて、高粘度増粘剤（増粘剤Ａ）はローターナンバー４、回転数１２ｒｐｍの組み合わせで、低粘度増粘剤（増粘剤Ｂ）はローターナンバー１、回転数６０ｒｐｍの組み合わせで、２０℃の環境下で測定した粘度である。
（７）消泡剤
・消泡剤：ポリエーテル系消泡剤（サンノプコ社製）。
The following materials were used.
(1) Hydraulic component-Alumina cement (Fonju, manufactured by Lafarge Aluminate, Blaine specific surface area 3100 cm 2 / g).
Portland cement (early strong cement, manufactured by Ube Mitsubishi Cement Co., Ltd., Blaine specific surface area 4500 cm 2 / g).
Gypsum: Type II anhydrous gypsum (manufactured by Central Glass, Blaine specific surface area 3460 cm 2 / g).
(2) Fine aggregate-Silica sand A: No. 6 silica sand.
Silica sand B: No. 7 silica sand.
(3) Inorganic component-Blast furnace slag (Riverment, manufactured by Chiba Riverment Co., Blaine specific surface area 4400 cm 2 / g).
(4) Setting controller-Bicarbonate Na: Sodium bicarbonate (Tosoh Corporation).
-Sodium tartrate: L-sodium tartrate (manufactured by Fuso Chemical Industries).
Carbonic acid Li: (Honjo Chemical Co., Ltd.).
-Al sulfate (Daimei Chemical Industry).
(5) Fluidizer-Fluidizer: Polycarboxylic acid fluidizer (Kao Corporation).
(6) Thickener ・ Thickener A: hydroxyethyl methylcellulose-based thickener (Marporose MX-30000, manufactured by Matsumoto Yushi Seiyaku Co., Ltd., viscosity: 27000-29000 mPa · s).
Thickener B: Hydroxypropyl methylcellulose-based thickener (Metroze FON-50, manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 50 mPa · s).
The viscosity is a 2% by weight aqueous solution of the above thickener, using a B-type viscometer, the high viscosity thickener (thickener A) is a combination of rotor number 4 and rotation speed 12 rpm. The viscosity agent (thickener B) is a viscosity measured in an environment of 20 ° C. in a combination of rotor number 1 and rotation speed 60 rpm.
(7) Antifoaming agent-Antifoaming agent: Polyether type antifoaming agent (manufactured by San Nopco).
（実施例３〜５、参考例１及び２、比較例１及び２）
（セルフレベリング材の調整）
表１に示す水硬性成分、細骨材、無機成分、流動化剤、凝結調整剤及び消泡剤に、表２に示す増粘剤を加えたもの（総量：１．５ｋｇ）を、ケミスタラーを用いて混練して水硬性組成物を調整し、さらに水３９０ｇを加えて３分間混練して、モルタルを得た。水硬性組成物及びスラリーの調整は、温度３０℃、湿度６５％の雰囲気下で行った。
(Examples 3 to 5, Reference Examples 1 and 2 , Comparative Examples 1 and 2 )
(Adjustment of self-leveling material)
Add the thickening agent shown in Table 2 to the hydraulic component, fine aggregate, inorganic component, fluidizing agent, setting agent and antifoaming agent shown in Table 1 (total amount: 1.5 kg). The mixture was kneaded to prepare a hydraulic composition, and 390 g of water was further added and kneaded for 3 minutes to obtain a mortar. The hydraulic composition and the slurry were adjusted in an atmosphere having a temperature of 30 ° C. and a humidity of 65%.
得られたモルタルを用いて、ＳＬ特性及び表面状態（凹凸及び粉化の程度）の評価を行った。結果を表３に示す。表３から明らかなように、本発明の水硬性組成物の実施例では、表面状態（凹凸及び粉化の程度）の評価は３以上であり、表面の平坦性に優れる硬化物を得ることができた。また、表３に示すように、フロー及びＳＬ値等についても目標値を満足しており、流動性に問題はなく、セルフレベリング材として水平レベルに優れることが明らかとなった。 Using the obtained mortar, the SL characteristics and the surface state (the unevenness and the degree of powdering) were evaluated. The results are shown in Table 3. As is clear from Table 3, in the examples of the hydraulic composition of the present invention, the evaluation of the surface state (unevenness and degree of powdering) is 3 or more, and a cured product having excellent surface flatness can be obtained. did it. Further, as shown in Table 3, it was also found that the flow, SL value, and the like satisfied the target values, there was no problem in fluidity, and the leveling level was excellent as a self-leveling material.
Claims (4)
水硬性成分１００質量％中、ポルトランドセメント２５〜５５質量％、アルミナセメント２５〜６０質量％及び石膏１５〜３５質量％の組成であり、
水硬性成分１００質量部に対し、細骨材１５０〜２５０質量部及び流動化剤０．０５〜０．３質量部であり、
自己流動性水硬性組成物は、さらに高炉スラグ、消泡剤、凝結遅延剤及び凝結促進剤を含み、
水硬性成分１００質量部に対し、高炉スラグ７０〜１３０質量部、消泡剤０．０２〜０．５質量部及び凝結促進剤と凝結遅延剤との合計量が０．３０〜１．５質量部であり、
増粘剤が、高粘度増粘剤及び低粘度増粘剤からなり、
水硬性成分１００質量部に対し、高粘度増粘剤及び低粘度増粘剤の合計量が０．２〜２質量部であり、
Ｂ型粘度計を用いて２０℃で測定した２質量％水溶液における粘度が、高粘度増粘剤では１５０００〜３０００００ｍＰａ・ｓ、低粘度増粘剤では２５〜４００ｍＰａ・ｓであり、
高粘度増粘剤と低粘度増粘剤との質量比率が、高粘度増粘剤：低粘度増粘剤＝４０：６０〜５０：５０である、自己流動性水硬性組成物。 A self-flowing hydraulic composition comprising a hydraulic component, fine aggregate, fluidizing agent and thickener;
It is a composition of 25 to 55% by mass of Portland cement, 25 to 60% by mass of alumina cement and 15 to 35% by mass of gypsum in 100% by mass of the hydraulic component,
150 to 250 parts by mass of fine aggregate and 0.05 to 0.3 parts by mass of a fluidizing agent with respect to 100 parts by mass of the hydraulic component,
The self-flowing hydraulic composition further comprises a blast furnace slag, an antifoaming agent, a setting retarder and a setting accelerator,
The total amount of blast furnace slag 70 to 130 parts by mass, antifoaming agent 0.02 to 0.5 parts by mass, and setting accelerator and setting retarder is 0.30 to 1.5 parts by mass with respect to 100 parts by mass of the hydraulic component. Department,
The thickener consists of a high viscosity thickener and a low viscosity thickener,
The total amount of the high viscosity thickener and the low viscosity thickener is 0.2 to 2 parts by mass with respect to 100 parts by mass of the hydraulic component.
The viscosity in a 2% by weight aqueous solution measured at 20 ° C. using a B-type viscometer is 15000 to 300000 mPa · s for a high viscosity thickener and 25 to 400 mPa · s for a low viscosity thickener,
A self-flowing hydraulic composition in which the mass ratio of the high viscosity thickener to the low viscosity thickener is high viscosity thickener: low viscosity thickener = 40: 60 to 50:50 .
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