JP4715368B2 - Self-leveling hydraulic composition - Google Patents
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Description
本発明は、硬化後の表面状態及び圧縮強度に優れるセルフレベリング性水硬性組成物に関する。さらに詳しくは、本発明は、天端などのコンクリートのレベル調整などに用いることができるセルフレベリング性水硬性組成物に関する。 The present invention relates to a self-leveling hydraulic composition that is excellent in the surface condition and compressive strength after curing. More specifically, the present invention relates to a self-leveling hydraulic composition that can be used for level adjustment of concrete such as the top.
セメントと硫酸アルミニウムとを含む組成物としては、特許文献１には、セメント１００質量部に対して、骨材１５０〜３５０質量部、フライアッシュ及び又はスラグ粉からなる混和材２０〜１００質量部及び膨張材０〜４０質量部を主成分とし、主成分１００質量部に対して、セメント用減水剤０．０１〜 ３質量部、保水剤０〜０．５質量部及び消泡剤０．０１〜１質量部からなるセルフレベリング性セメント組成物に、硫酸アルミニウムがセメントと骨材との合計量に対して０．１〜０．４５重量％含まれていることを特徴とするセルフレベリング性セメント組成物が、特許文献２には、ポルトランドセメント１０〜３０部、高炉スラグ２０〜４０部、フライアッシュ１０〜３５部、シリカフューム１０〜２０部、及び硫酸塩１〜１０部を含有してなるセメント組成物が開示されている。 As a composition containing cement and aluminum sulfate, Patent Document 1 discloses that, with respect to 100 parts by mass of cement, 150 to 350 parts by mass of aggregate, 20 to 100 parts by mass of an admixture made of fly ash and / or slag powder, and The main component is 0 to 40 parts by mass of an expanding material, and 0.01 to 3 parts by mass of a water reducing agent for cement, 0 to 0.5 parts by mass of a water retention agent and 0.01 to 0.01 part of defoaming agent for 100 parts by mass of the main component. A self-leveling cement composition comprising aluminum sulphate in an amount of 0.1 to 0.45% by weight based on the total amount of cement and aggregate in a self-leveling cement composition comprising 1 part by mass. In Patent Document 2, Portland cement 10-30 parts, blast furnace slag 20-40 parts, fly ash 10-35 parts, silica fume 10-20 parts, and sulfate 1-10 parts A cement composition is disclosed.
本発明は、セメントと硫酸アルミニウムとを含む組成物で、硬化物の圧縮強度が高く、表面状態の優れるセルフレベリング性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 which is a composition containing cement and aluminum sulfate and has a high compression strength of a cured product and an excellent surface state.
本発明は、主成分と、硫酸アルミニウムと、収縮低減剤とを含むセルフレベリング性水硬性組成物であり、
主成分はポルトランドセメント１００質量部、骨材１５０〜３５０質量部、混和材０質量部を超えて２０質量部未満及び膨張材０〜４０質量部からなり、
硫酸アルミニウムはセメントと骨材との合計量（１００質量％）に対して０．１〜０．７質量％含むセルフレベリング性水硬性組成物を提供することである。
The present invention is a self-leveling hydraulic composition comprising a main component, aluminum sulfate, and a shrinkage reducing agent,
The main component consists of 100 parts by weight of Portland cement, 150 to 350 parts by weight of aggregate, 0 parts by weight of admixture and less than 20 parts by weight and 0 to 40 parts by weight of expansion material,
Aluminum sulfate provides a self-leveling hydraulic composition containing 0.1 to 0.7% by mass with respect to the total amount (100% by mass) of cement and aggregate.
本発明は、上記のセルフレベリング性水硬性組成物と水とを混練して得られるモルタルを提供することである。
本発明は、上記のセルフレベリング性水硬性組成物と水との配合物を硬化させて得られる硬化物を提供することである。
The present invention is to provide a mortar obtained by kneading the above self-leveling hydraulic composition and water.
This invention is providing the hardened | cured material obtained by hardening the compound of said self-leveling hydraulic composition and water.
本発明のセルフレベリング性水硬性組成物の好ましい態様を以下に示し、これら態様は複数組み合わせることが出来る。
１）セルフレベリング性水硬性組成物は、好ましくは主成分１００質量部に対し収縮低減剤を０．１〜３質量部を含むこと。
２）セルフレベリング性水硬性組成物は、さらに繊維を含むこと、好ましくは主成分１００質量部に対し繊維０．０１〜５質量部を含むこと。
３）セルフレベリング性水硬性組成物は、さらに流動化剤、増粘剤及び消泡剤から選ばれる成分を少なくとも１種含むこと、好ましくは主成分１００質量部に対し流動化剤０．０１〜３質量部、増粘剤０．０１〜３質量部及び消泡剤０．０１〜３質量部から選ばれる成分を少なくとも１種含むこと。
４）セルフレベリング性水硬性組成物は、さらに硫酸アルミニウムを除く凝結調整剤を含むこと、好ましくはさらに凝結遅延剤を含むこと。
５）セルフレベリング性水硬性組成物は、天端などのコンクリートのレベル調整用であること。
Preferred embodiments of the self-leveling hydraulic composition of the present invention are shown below, and a plurality of these embodiments can be combined.
1) The self-leveling hydraulic composition preferably contains 0.1 to 3 parts by mass of a shrinkage reducing agent with respect to 100 parts by mass of the main component.
2) The self-leveling hydraulic composition further contains fibers, preferably 0.01 to 5 parts by mass of fibers with respect to 100 parts by mass of the main component.
3) The self-leveling hydraulic composition further includes at least one component selected from a fluidizing agent, a thickener, and an antifoaming agent, and preferably 0.01 to about 100 parts by mass of the main component. It contains at least one component selected from 3 parts by mass, 0.01 to 3 parts by mass of a thickener and 0.01 to 3 parts by mass of an antifoaming agent.
4) The self-leveling hydraulic composition further contains a setting modifier excluding aluminum sulfate, and preferably further contains a setting retarder.
5) The self-leveling hydraulic composition is for adjusting the level of concrete at the top.
本発明のセルフレベリング性水硬性組成物は、施工性に優れ、圧縮強度及び表面状態の優れる硬化物を得ることができる。 The self-leveling hydraulic composition of the present invention is excellent in workability and can provide a cured product having excellent compressive strength and surface condition.
ポルトランドセメントは、ＪＩＳに適合する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、耐硫酸塩ポルトランドセメント、低熱ポルトランドセメント、ビーライト系ポルトランドセメント、白色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、シリカセメントなどの混合セメントなどを挙げることができる。 Portland cement is JIS-compliant ordinary Portland cement, early-strength Portland cement, ultra-early strong Portland cement, moderately hot Portland cement, sulfate-resistant Portland cement, low heat Portland cement, belite-based Portland cement, white Portland cement, blast furnace cement And mixed cements such as fly ash cement and silica cement.
骨材としては、珪砂、川砂、海砂、山砂、砕砂などの砂、シリカ粉、粘土鉱物、廃ＦＣＣ触媒などの無機質材などの細骨材を用いることができる。骨材としては、２ｍｍ以下の径のもの、好ましくは１ｍｍ以下の径のもの、さらに好ましくは０．７ｍｍ以下の径のもの、より好ましくは０．６ｍｍ以下の径のものを用いることが好ましい。
骨材ついては、粒子径の小さいな珪砂、川砂、海砂、山砂、砕砂などの砂、石英粉末、廃ＦＣＣ触媒などの骨材を用いることが好ましい。
特に、骨材としては、珪砂、川砂、海砂、山砂、砕砂などの２ｍｍ以下、さらに好ましくは１ｍｍ以下、より好ましくは０．７ｍｍ以下の砂などが好ましく用いることが出来る。
骨材としては、天端などのコンクリートのレベル調整などに用いるために、好ましくは１ｍｍ以下、さらに好ましくは０．８ｍｍ以下、より好ましくは０．７ｍｍ以下、特に好ましくは０．６ｍｍ以下のものを用いることが好ましい。
骨材は、ポルトランドセメント１００質量部に対し、１５０〜３５０質量部、好ましくは１６０〜２５０質量部、さらに好ましくは１８０〜２１０質量部の範囲であり、前記範囲内では流動性及び表面状態の優れる硬化物を得るために好ましい。
As the aggregate, fine aggregates such as silica sand, river sand, sea sand, mountain sand, crushed sand and the like, silica powder, clay minerals, and inorganic materials such as waste FCC catalyst can be used. As the aggregate, it is preferable to use one having a diameter of 2 mm or less, preferably 1 mm or less, more preferably 0.7 mm or less, more preferably 0.6 mm or less.
As for the aggregate, it is preferable to use aggregates such as silica sand, river sand, sea sand, mountain sand, crushed sand, etc., quartz powder, and waste FCC catalyst having a small particle diameter.
In particular, as the aggregate, sand of 2 mm or less, more preferably 1 mm or less, more preferably 0.7 mm or less, such as quartz sand, river sand, sea sand, mountain sand, and crushed sand can be preferably used.
The aggregate is preferably 1 mm or less, more preferably 0.8 mm or less, more preferably 0.7 mm or less, particularly preferably 0.6 mm or less in order to be used for level adjustment of concrete such as the top. It is preferable to use it.
The aggregate is in the range of 150 to 350 parts by weight, preferably 160 to 250 parts by weight, and more preferably 180 to 210 parts by weight with respect to 100 parts by weight of Portland cement. Within the above range, the fluidity and surface state are excellent. It is preferable for obtaining a cured product.
混和材としては、フライアッシュ、高炉スラグなどのスラグ粉末などを挙げることができ、これらは単独でも２種以上併用しても用いることができ、好ましくはフライアッシュ及び高炉スラグとを含むことが好ましい。これら混和材は硫酸アルミニウムをＳＬ材に含有させたときに生じ易いひび割れを抑制し、硫酸アルミニウムの収縮低減効果を増長させるので好適である。混和材の量は、ポルトランドセメント１００質量部に対して、０質量部を超えて２０質量部未満、好ましくは０．５〜２０質量部未満、さらに好ましくは１質量部から２０質量部未満、より好ましくは３質量部から２０質量部未満、特に好ましくは７質量部から２０質量部未満の範囲の量が適当であり、表面状態及び圧縮強度の優れる硬化物を得ることができる。 Examples of the admixture include slag powder such as fly ash and blast furnace slag, and these can be used alone or in combination of two or more, and preferably contain fly ash and blast furnace slag. . These admixtures are suitable because they suppress cracking that is likely to occur when aluminum sulfate is contained in the SL material, and increase the shrinkage reduction effect of aluminum sulfate. The amount of the admixture exceeds 0 parts by mass and less than 20 parts by mass, preferably 0.5 to less than 20 parts by mass, more preferably 1 to less than 20 parts by mass, relative to 100 parts by mass of Portland cement. An amount in the range of preferably 3 parts by mass to less than 20 parts by mass, particularly preferably 7 parts by mass to less than 20 parts by mass is appropriate, and a cured product having excellent surface condition and compressive strength can be obtained.
セルフレベリング性水硬性組成物は、主成分として膨張材を含むことができる。
膨張材は、例えばエトリンガイト系のカルシウムサルホアルミネートを主成分とするもの、酸化カルシウム、酸化アルミニウム及び三酸化イオウを主成分とするもの、石灰系のもの、石膏などを挙げることができ、なかでも石膏を含有するものを好適に用いることができる。
膨張材の量は、ポルトランドセメント１００質量部に対して、４０質量部以下、好ましくは２０質量部以下、さらに好ましくは１５質量部以下含むことが、膨張によるクラック発生防止のために好ましい。
The self-leveling hydraulic composition can contain an expanding material as a main component.
Expandable material, for example those based on calcium sulfoaluminate of Etorin Gaito system, mainly composed of calcium oxide, aluminum oxide and sulfur trioxide, those of lime, and the like can be illustrated gypsum, Naka However, those containing gypsum can be preferably used.
The amount of the expansion material is preferably 40 parts by mass or less, preferably 20 parts by mass or less, and more preferably 15 parts by mass or less with respect to 100 parts by mass of Portland cement in order to prevent cracks due to expansion.
石膏としては、無水、半水等の石膏がその種類を問わず、一種又は二種以上の混合物として使用できる。
石灰類としては、生石灰、消石灰、仮焼ドロマイト、炭酸カルシウム等が挙げられ、一種又は二種以上の混合物として使用できる。特に石灰類としては、消石灰が好ましい。
As the gypsum, gypsum such as anhydrous or semi-water can be used as one kind or a mixture of two or more kinds regardless of the kind.
Examples of limes include quick lime, slaked lime, calcined dolomite, calcium carbonate and the like, and they can be used as one kind or a mixture of two or more kinds. Especially as limes, slaked lime is preferable.
硫酸アルミニウムは、ポルトランドセメントと骨材との合計量（１００質量％）に対して０．１〜０．７重量％、好ましくは０．１〜０．５重量％、さらに好ましくは０．１５〜０．４５重量％、特に好ましくは０．２〜０．４重量％である。
硫酸アルミニウムはその含有量が少なすぎると収縮低減効果の発現が不十分となり、また含有量が増すに従って収縮低減効果も大きくなるがあまり多すぎると、流動性が低下するとともに硬化体に微細なひび割れが生じるので硫酸アルミニウムは前記範囲が好適である。
Aluminum sulfate is 0.1 to 0.7% by weight, preferably 0.1 to 0.5% by weight, more preferably 0.15 to 0.15% by weight based on the total amount (100% by mass) of Portland cement and aggregate. 0.45% by weight, particularly preferably 0.2 to 0.4% by weight.
If the content of aluminum sulfate is too small, the effect of shrinkage reduction will be insufficient, and the shrinkage reduction effect will increase as the content increases, but if too much, the fluidity will decrease and fine cracks will appear in the cured body. Therefore, the above range is preferable for aluminum sulfate.
収縮低減剤は、本発明の特性を損なわない範囲でセルフレベリング性水硬性組成物に配合し、収縮低減剤を含むことにより硬化時のクラックの発生を抑制し、圧縮強度が向上する。収縮低減剤としては、公知の収縮低減剤を用いることができ、特に下記化学式（１）で表されるアルキレンオキシド重合物を化学構造の骨格に有するものなどを用いることができる。
収縮低減剤としては、例えばポリプロピレングリコール、ポリ（プロピレン・エチレン）グリコールなどのポリアルキレングリコール類、炭素数１〜６のアルコキシポリ（プロピレン・エチレン）グリコールなどの一般に公知のものをもちいることができる。
セルフレベリング性水硬性組成物において、収縮低減剤の配合量は、用いる主成分やセルフレベリング性水硬性組成物により、配合量を適宜選択すればよく、例えば主成分１００質量部に対し好ましくは０．１〜３質量部、さらに好ましくは０．１５〜２質量部、特に好ましくは０．２〜１質量部を含むことができる。
The shrinkage reducing agent is blended in the self-leveling hydraulic composition within a range not impairing the characteristics of the present invention, and by containing the shrinkage reducing agent, generation of cracks during curing is suppressed, and the compressive strength is improved. As the shrinkage reducing agent, known shrinkage reducing agents can be used, and in particular, those having an alkylene oxide polymer represented by the following chemical formula (1) in the skeleton of the chemical structure can be used.
As the shrinkage reducing agent, generally known ones such as polyalkylene glycols such as polypropylene glycol and poly (propylene / ethylene) glycol, and alkoxy poly (propylene / ethylene) glycol having 1 to 6 carbon atoms can be used. .
In the self-leveling hydraulic composition, the blending amount of the shrinkage reducing agent may be appropriately selected depending on the main component to be used and the self-leveling hydraulic composition. For example, it is preferably 0 with respect to 100 parts by mass of the main component. 0.1 to 3 parts by mass, more preferably 0.15 to 2 parts by mass, and particularly preferably 0.2 to 1 part by mass.
セルフレベリング性水硬性組成物は、必要に応じて繊維や樹脂粉など、流動化剤（減水剤）、増粘剤、消泡剤、凝結調整剤などを含むことができる。 The self-leveling hydraulic composition can contain a fluidizing agent (water reducing agent), a thickening agent, an antifoaming agent, a setting modifier, and the like as necessary, such as fibers and resin powder.
セルフレベリング性水硬性組成物は、硫酸アルミニウムを除く凝結調整剤を、必要に応じて配合することができ、凝結遅延を行う成分である凝結遅延剤と、凝結促進を行う成分である凝結促進剤とを、各々単独で、或いは併用して用いることができる。
セルフレベリング性水硬性組成物は、凝結調整剤の凝結促進剤及び／又は凝結遅延剤の成分、添加量及び混合比率を適宜選択して、流動性、可使時間、硬化性状などを調整することができ、２０℃可使時間を数分程度から１時間程度まで任意の時間に調整することができる。
The self-leveling hydraulic composition can be blended as necessary with a setting modifier other than aluminum sulfate, and a setting retarder that is a component that delays setting and a setting accelerator that is a component that accelerates setting. Can be used alone or in combination.
For self-leveling hydraulic compositions, adjust the fluidity, pot life, curing properties, etc. by appropriately selecting the components, addition amount and mixing ratio of the setting accelerator and / or setting retarder of the setting modifier. The pot life of 20 ° C. can be adjusted to an arbitrary time from about several minutes to about 1 hour.
凝結促進剤としては、公知の凝結促進剤を用いることが出来る。凝結促進剤の一例として、炭酸リチウム、塩化リチウム、硫酸リチウム、硝酸リチウム、水酸化リチウム、酢酸リチウム、酒石酸リチウム、リンゴ酸リチウム、クエン酸リチウムなどの有機酸などの、無機リチウム塩や有機リチウム塩などのリチウム塩を用いることが出来る。特に炭酸リチウムは、効果、入手容易性、価格の面から好ましい。
凝結促進剤としては、特性を妨げない粒径を用いることが好ましく、粒径は５０μｍ以下にするのが好ましい。
A known setting accelerator can be used as the setting accelerator. Examples of setting accelerators include inorganic and organic lithium salts such as lithium carbonate, lithium chloride, lithium sulfate, lithium nitrate, lithium hydroxide, lithium acetate, lithium tartrate, lithium malate, lithium citrate, and other organic acids. Lithium salt such as can be used. In particular, lithium carbonate is preferable from the viewpoints of effects, availability, and cost.
As the setting accelerator, it is preferable to use a particle size that does not interfere with the properties, and the particle size is preferably 50 μm or less.
凝結遅延剤としては、公知の凝結遅延剤を用いることが出来る。凝結遅延剤の一例として、硫酸ナトリウム、重炭酸ナトリウム、酒石酸ナトリウム、リンゴ酸ナトリウム、クエン酸ナトリウム、グルコン酸ナトリウムなど有機酸などの、無機ナトリウム塩や有機ナトリウム塩などのナトリウム塩を用いることが出来る。 As the setting retarder, a known setting retarder can be used. As an example of a set retarder, sodium salts such as inorganic sodium salts and organic sodium salts such as sodium sulfate, sodium bicarbonate, sodium tartrate, sodium malate, sodium citrate, and sodium gluconate can be used. .
流動化剤としては、減水効果を合わせ持つ、ナフタレンスルホン酸塩ホルマリン縮合物、オレフィン不飽和カルボン酸共重合体塩、リグニンスルホン酸塩、カゼイン、カゼインカルシウム、ポリエーテル系等、市販のものが、その種類を問わず使用できる。
流動化剤（減水剤）は、本発明の特性を損なわない範囲で添加することができ主成分１００質量部に対し、０．００１〜５質量部、さらに好ましくは０．０１〜４質量部、より好ましくは０．０３〜３質量部、特に好ましくは０．０５〜２質量部であり、添加量が余り少ないと十分な効果が発現せず、また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、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、充填性が悪化する場合がある。
As a fluidizing agent, commercially available products such as naphthalene sulfonate formalin condensate, olefin unsaturated carboxylic acid copolymer salt, lignin sulfonate, casein, casein calcium, polyether, etc., which have a water reducing effect, It can be used regardless of the type.
The fluidizing agent (water reducing agent) can be added within a range that does not impair the characteristics of the present invention, and is 0.001 to 5 parts by mass, more preferably 0.01 to 4 parts by mass with respect to 100 parts by mass of the main component. More preferably it is 0.03 to 3 parts by mass, particularly preferably 0.05 to 2 parts by mass. If the addition amount is too small, a sufficient effect will not be exhibited, and if it is too much, the effect commensurate with the addition amount is In addition to being uneconomical and not expected, the amount of kneading water for obtaining the required fluidity increases, and at the same time, the viscosity increases and the filling property may deteriorate.
増粘剤は、セルロース系、蛋白質系、ラテックス系、及び水溶性ポリマー系などを用いることが出来、特にセルロース系などを用いることが出来る。
増粘剤の添加量は、本発明の特性を損なわない範囲で添加することができ、主成分１００質量部に対して、好ましくは０．００１〜２質量部、さらに好ましくは０．００５〜１．５質量部、より好ましくは０．０１〜１質量部、特に０．０２〜０．５質量部含むことが好ましい。増粘剤の添加量が多くなると、流動性の低下を招く恐れがあり好ましくない。
増粘剤及び消泡剤を併用して用いることは、主成分の骨材分離の抑制、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、セルフレベリング材としての特性を向上させるために好ましい。
As the thickener, cellulose-based, protein-based, latex-based, water-soluble polymer-based, and the like can be used, and in particular, cellulose-based can be used.
The addition amount of the thickener can be added within a range that does not impair the characteristics of the present invention, and is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 1 with respect to 100 parts by mass of the main component. 0.5 parts by mass, more preferably 0.01 to 1 part by mass, particularly preferably 0.02 to 0.5 parts by mass. If the amount of the thickener added is increased, the fluidity may be lowered, which is not preferable.
The combined use of a thickener and an antifoaming agent has a favorable effect on the suppression of aggregate separation of the main components, the suppression of bubble generation, and the improvement of the cured body surface, and improves the properties as a self-leveling material. Is preferable.
増粘剤の具体例としては、メチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルメチルセルロース、ヒドロキシエチルメチルセルロース、グリオキザール付加ヒドロキシプロピルメチルセルロース、カルボキシメチルセルロース等のセルロース誘導体、ポリアクリルアミド、ポリエチレンオキシド、ポリビニルアルコール、ポリアクリル酸、ポリアクリル酸ソーダ等の水溶性高分子等が挙げられる。 Specific examples of the thickener include cellulose derivatives such as methylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, hydroxyethylmethylcellulose, glyoxal-added hydroxypropylmethylcellulose, carboxymethylcellulose, polyacrylamide, polyethylene oxide, polyvinyl alcohol, polyacrylic acid, polyacrylic Water-soluble polymers such as acid soda are listed.
消泡剤は、シリコン系、アルコール系、ポリエーテル系などの合成物質、石油精製由来の鉱物油系又は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出来る。
消泡剤の添加量は、本発明の特性を損なわない範囲で添加することができ、主成分１００質量部に対して、好ましくは０．００１〜２質量部、さらに好ましくは０．００５〜１．５質量部、より好ましくは０．０１〜１質量部、特に０．０２〜０．５質量部含むことが好ましい。消泡剤の添加量は、上記範囲内が、消泡効果が認められるために好ましい。
As the antifoaming agent, known materials such as synthetic materials such as silicon-based, alcohol-based, and polyether-based materials, mineral oil-based materials derived from petroleum refining, or plant-derived natural materials can be used.
The addition amount of the antifoaming agent can be added within a range that does not impair the characteristics of the present invention, and is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 1 with respect to 100 parts by mass of the main component. 0.5 parts by mass, more preferably 0.01 to 1 part by mass, particularly preferably 0.02 to 0.5 parts by mass. The addition amount of the antifoaming agent is preferably within the above range because an antifoaming effect is recognized.
繊維は、ポリエチレン、エチレン・酢酸ビニル共重合体（ＥＶＡ）、ポリプロピレンなどのポリオレフィン、ポリエステル、ポリアミド、ポリビニルアルコール、ポリ塩化ビニルなどの樹脂成分からなる有機繊維、ステンレス繊維、アルミ繊維などの金属系繊維などを用いることが出来、これらは一種又は二種以上の混合物として使用できる。
特に繊維は、有機繊維が好ましく、繊維長は０．５〜１５ｍｍ程度のものを用いることが好ましい。
セルフレベリング性水硬性組成物は、繊維を含むことにより、圧縮強度の優れ、クラックの起きにくい又は起きない硬化物を得ることができる。
繊維は、主成分１００質量部に対し、好ましくは０．００１〜２質量部、さらに好ましくは０．００３〜１質量部、より好ましくは０．０１〜０．５質量部、特に好ましくは０．０３〜０．２質量部含むことが好ましい。
Fibers include polyethylene, ethylene-vinyl acetate copolymer (EVA), polyolefins such as polypropylene, organic fibers made of resin components such as polyester, polyamide, polyvinyl alcohol, and polyvinyl chloride, and metal fibers such as stainless steel fibers and aluminum fibers. These can be used, and these can be used as one kind or a mixture of two or more kinds.
In particular, the fiber is preferably an organic fiber, and the fiber length is preferably about 0.5 to 15 mm.
By including a fiber, the self-leveling hydraulic composition can obtain a cured product that has excellent compressive strength and hardly or does not cause cracking.
The fiber is preferably 0.001 to 2 parts by mass, more preferably 0.003 to 1 part by mass, more preferably 0.01 to 0.5 part by mass, and particularly preferably 0.001 to 2 parts by mass with respect to 100 parts by mass of the main component. It is preferable to contain 03-0.2 mass part.
樹脂粉は、高分子エマルジョン及び高分子エマルジョンより液体成分を除去した高分子粒子（再乳化樹脂粒子など）を用いることができ、公知の建設用又は建材用の高分子エマルジョン及び高分子エマルジョンより液体成分を除去した高分子粒子を用いることができ、例えばα、β−エチレン性不飽和単量体を乳化重合して得られる高分子エマルジョンと、この高分子エマルジョンの液体成分を除去して得られる高分子樹脂粒子などを挙げることができる。
樹脂粉は、樹脂固形分の配合割合は、主成分１００質量部に対し、好ましくは０．００１〜１０質量部、好ましくは０.００５〜８質量部、好ましくは０.０１〜５質量部、特に好ましくは０.０５〜２質量部配合することができる。
As the resin powder, polymer emulsions and polymer particles from which liquid components have been removed from the polymer emulsion (such as re-emulsified resin particles) can be used, and liquids can be used from known polymer emulsions and polymer emulsions for construction or building materials. Polymer particles from which the components have been removed can be used. For example, a polymer emulsion obtained by emulsion polymerization of an α, β-ethylenically unsaturated monomer and a liquid component of the polymer emulsion can be obtained. Examples thereof include polymer resin particles.
In the resin powder, the resin solid content is preferably 0.001 to 10 parts by weight, preferably 0.005 to 8 parts by weight, preferably 0.01 to 5 parts by weight, based on 100 parts by weight of the main component. Particularly preferably, 0.05 to 2 parts by mass can be blended.
α、β−エチレン性不飽和単量体としては、公知のα、β−エチレン性不飽和単量体を挙げることが出来、例えばアクリル酸及びこのエステルなどの誘導体、メタクリル酸及びこのエステルなどの誘導体、エチレン、プロピレンなどのα−オレフィン、酢酸ビニル、スチレンなどの芳香族ビニル類、塩化ビニル、バーサチック酸ビニルエステルなどの炭素数が９〜１１の第３級脂肪酸ビニルエステル（Ｒ−ＣＯＯ−ＣＨ＝ＣＨ２、Ｒは炭素数が９〜１１の第３級炭素である）などを挙げることができる。 Examples of the α, β-ethylenically unsaturated monomer include known α, β-ethylenically unsaturated monomers such as acrylic acid and its derivatives such as esters, methacrylic acid and these esters, etc. Derivatives, α-olefins such as ethylene and propylene, aromatic vinyls such as vinyl acetate and styrene, vinyl chloride, and tertiary fatty acid vinyl esters (R-COO-CH) having 9 to 11 carbon atoms such as vinyl acetate and vinyl acetate ═CH 2 , R is a tertiary carbon having 9 to 11 carbon atoms).
セルフレベリング性水硬性組成物は、水と配合し、混練することにより、モルタルを製造することができ、用途に応じて、水の配合量を適宜選択することにより、フローを調整したモルタルを製造することができる。
本発明のセルフレベリング性水硬性組成物において、水の配合量は、主成分１００質量部に対し、好ましくは１０〜９０質量部、さらに好ましくは２０〜７０質量部、より好ましくは２５〜５０質量部を加えて用いることが好ましい。
The self-leveling hydraulic composition can be mixed with water and kneaded to produce a mortar, and the mortar with adjusted flow can be produced by appropriately selecting the amount of water added according to the application. can do.
In the self-leveling hydraulic composition of the present invention, the amount of water is preferably 10 to 90 parts by weight, more preferably 20 to 70 parts by weight, and more preferably 25 to 50 parts by weight with respect to 100 parts by weight of the main component. It is preferable to add and use parts.
セルフレベリング性水硬性組成物は、左官、屋根材、床材、壁材、防水材などのこて塗り用や吹き付け用のモルタル、土木構造物の補修や補強に用いる断面修復材やグラウト材などとして、土木、建築、建設分野に使用することができる。
セルフレベリング性水硬性組成物は、コンクリートの表面仕上げや天端の表面仕上げ等に用いることができる。
Self-leveling hydraulic compositions include plaster, roofing materials, flooring materials, wall materials, mortar for spraying and waterproofing materials, cross-sectional restoration materials and grout materials used for repair and reinforcement of civil engineering structures, etc. Can be used in the civil engineering, construction and construction fields.
The self-leveling hydraulic composition can be used for surface finishing of concrete, surface finishing of the top edge, and the like.
本発明のセルフレベリング性水硬性組成物の好適な配合例は、
１）セメント１００質量部に対して、
骨材が１５０〜３５０質量部、好ましくは１６０〜３００質量部、さらに好ましくは１７０〜２５０質量部、
フライアッシュ及びスラグ粉から選択される成分を少なくとも１種含む混和材が、０質量部を超えて２０質量部未満、好ましくは３〜１９質量部、さらに好ましくは５〜１８質量部、
及び膨張材が０〜４０質量部、好ましくは５〜３０質量部、さらに好ましくは８〜２０質量部からなる主成分と、
２）硫酸アルミニウムがセメントと骨材との合計量（１００質量％）に対して０．１〜０．７重量％、好ましくは０.２〜０.６質量％、さらに好ましくは０.３〜０.４質量％含まれ、
３）収縮低減剤が主成分１００質量部に対し０．１〜３質量部を含み、
４）繊維が主成分１００質量部に対し０．０１〜０.１５質量部を含み、
５）樹脂粉が主成分１００質量部に対し０．０１〜０.５質量部を含み、
６）主成分１００質量部に対して、流動化剤（減水剤）０．０５〜１質量部、増粘剤０〜０．５質量部、消泡剤０．０１〜１質量部及び凝結遅延剤０.０１〜０.１質量部とを含むものである。
A suitable blending example of the self-leveling hydraulic composition of the present invention is:
1) For 100 parts by mass of cement,
The aggregate is 150 to 350 parts by mass, preferably 160 to 300 parts by mass, more preferably 170 to 250 parts by mass,
The admixture containing at least one component selected from fly ash and slag powder is more than 0 parts by weight and less than 20 parts by weight, preferably 3 to 19 parts by weight, more preferably 5 to 18 parts by weight,
And the expansion material is 0 to 40 parts by mass, preferably 5 to 30 parts by mass, more preferably 8 to 20 parts by mass,
2) Aluminum sulfate is 0.1 to 0.7% by weight, preferably 0.2 to 0.6% by weight, more preferably 0.3 to 0.1% by weight based on the total amount (100% by weight) of cement and aggregate. Contained 0.4% by weight,
3) The shrinkage reducing agent contains 0.1 to 3 parts by mass with respect to 100 parts by mass of the main component,
4) The fiber contains 0.01 to 0.15 parts by mass with respect to 100 parts by mass of the main component,
5) The resin powder contains 0.01 to 0.5 parts by mass with respect to 100 parts by mass of the main component,
6) 0.05 to 1 part by mass of fluidizing agent (water reducing agent), 0 to 0.5 part by mass of thickener, 0.01 to 1 part by mass of antifoaming agent and setting delay with respect to 100 parts by mass of the main component. 0.01 to 0.1 part by mass of the agent.
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.
・流動性： 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、混練直後のスラリー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、長さ２００ｍｍ流れる最短の時間を測定し、その値（Ｌ０）とする。物性評価は、温度５℃で行う。 -Fluidity: Using the SL measuring device shown in FIG. 1, a rail having a width of 30 mm, a height of 30 mm and a length of 750 mm is provided with a weir plate at a length of 150 mm from the tip, and a predetermined amount of slurry immediately after kneading is filled. To mold. Immediately after molding, the weir plate is pulled up, and the shortest time that the length of 200 mm flows is measured, and the value (L0) is obtained. The physical properties are evaluated at a temperature of 5 ° C.
（硬化物の評価）
圧縮強度については、ＪＩＳ・Ｒ５２０１に準じて、温度５℃、湿度６５％の環境下で測定する。
測定資料は、モルタル供試体成形用型(４０×４０×１６０ｍｍ)で成型、養生し、硬化させたものを用いる。
(Evaluation of cured product)
The compressive strength is measured in an environment of a temperature of 5 ° C. and a humidity of 65% according to JIS / R5201.
As the measurement data, a mortar specimen molding die (40 × 40 × 160 mm) molded, cured and cured is used.
（硬化後の表面状態評価）
モルタルを、パレット(２８０×１９０×Ｈ１５ｍｍ)に流し込み、温度５℃、湿度６５％の環境下の条件で養生して、得られる硬化物の表面を目視で観察して評価し、メクレはさらに金ごてを使用して評価する。表面の凹凸、気泡、メクレ及びクラックの４項目について評価を行う。
１）表面の凹凸の評価：（○：凹凸が０、△：凹凸が１〜５個程度、×：凹凸が多数認められるの３段階で行う。）
２）気泡の評価：（○：気泡が０、△：気泡が１〜５個程度、×：気泡が多数認められるの３段階で行う。）
３）メクレの評価：（○：メクレが０、△：メクレが１〜５箇所程度、×：メクレが多数認められるの３段階で行う。）
４）クラックの評価：（○：クラックが０、△：クラックが１〜５個程度、×：クラックが多数認められるの３段階で行う。）
(Evaluation of surface condition after curing)
The mortar is poured into a pallet (280 × 190 × H15 mm), cured under conditions of temperature 5 ° C. and humidity 65%, and the surface of the resulting cured product is visually observed and evaluated. Evaluate using a trowel. Evaluation is made on the four items of surface irregularities, bubbles, crevices and cracks.
1) Evaluation of unevenness on the surface: (◯: Performed in 3 steps: unevenness is 0, Δ: approximately 1-5 unevenness, x: many unevenness is recognized.)
2) Evaluation of bubbles: (◯: Performed in three stages: 0 bubbles, Δ: about 1 to 5 bubbles, x: many bubbles observed)
3) Evaluation of mekure: (O: mekure is 0, Δ: mekre is about 1 to 5 places, x: many mekre are recognized.)
4) Evaluation of cracks: (O: Performed in three stages: 0 cracks, Δ: about 1 to 5 cracks, x: many cracks recognized)
（１）使用材料：以下の材料を使用した。
・ポルトランドセメント：三菱宇部セメント社製、早強セメント、ブレーン比表面積４，５００ｃｍ２／ｇ。
・高炉スラグ：川崎製鉄社製、リバメント、ブレーン比表面積４，４００ｃｍ２／ｇ。
・フライアッシュ：常磐火力産業社製、９号。
・珪砂：東海サンド社製、浜岡砂（最大粒径：０．６ｍｍのもの）。
・石膏：旭硝子社製、フッ酸無水石膏、ブレーン比表面積３，３００ｃｍ２／ｇ。
・収縮低減剤：竹本油脂社製、ヒビダン。
・硫酸カリウム：上野製薬社製。
・硫酸アルミニウム：大明化学工業社製、Ｓ１５０。
・遅延剤:グルコン酸ナトリウム、富田製薬社製。
・樹脂粉：クラリアントポリマー社製、モビニールパウダーＤＭ２００。
・繊維：ポリエステル繊維、京都繊維資材社製、２ｍｍ。
・流動化剤：ポリカルボン酸系減水剤（市販品、建材用）。
・増粘剤：松本油脂社製、マーポローズＥＭＰ３０。
・消泡剤:旭電化工業社製、アデカＢ１１５Ｆ。
(1) Materials used: The following materials were used.
Portland cement: Mitsubishi Ube Cement Co., Ltd., early strength cement, Blaine specific surface area 4,500 cm 2 / g.
-Blast furnace slag: manufactured by Kawasaki Steel Corporation, liberment, Blaine specific surface area 4,400 cm 2 / g.
・ Fly ash: No. 9 manufactured by Joban Thermal Power Industry Co., Ltd.
Silica sand: Hamaoka sand (with a maximum particle size of 0.6 mm) manufactured by Tokai Sand.
Gypsum: Asahi Glass Co., Ltd., hydrofluoric acid anhydrous gypsum, Blaine specific surface area 3,300 cm 2 / g.
・ Shrinkage reducing agent: Takedan, manufactured by Takemoto Yushi Co., Ltd.
-Potassium sulfate: Ueno Pharmaceutical Co., Ltd.
Aluminum sulfate: manufactured by Daimei Chemical Co., Ltd., S150.
-Delay agent: Sodium gluconate, manufactured by Tomita Pharmaceutical.
-Resin powder: manufactured by Clariant Polymer Co., Ltd., Mobile Vinyl DM200.
-Fiber: Polyester fiber, manufactured by Kyoto Textile Materials Co., Ltd., 2 mm.
・ Fluidizing agent: Polycarboxylic acid-based water reducing agent (commercial product, for building materials).
・ Thickener: Marprose EMP30 manufactured by Matsumoto Yushi Co., Ltd.
Antifoaming agent: Adeka B115F manufactured by Asahi Denka Kogyo Co., Ltd.
（実施例１及び２、比較例１及び２）
表１に記載の主成分と、表２に示す添加し混合してＳＬ組成物を製造した。次いで水を入れたポリエチレンビーカ（２．０リットル）内をミキサーで撹拌しながら、水／ＳＬ組成物比が０．２６になるようにＳＬ組成物（１ｋｇ）を投入し、３分間混練し、モルタルを得た。モルタルのフロー値を測定し、さらに硬化させ、材齢２８日後の圧縮強度及び表面状態の評価を行い、結果を表３に示す。（温度５℃、湿度６５％の環境下で養生）
(Examples 1 and 2, Comparative Examples 1 and 2)
SL components were produced by adding and mixing the main components shown in Table 1 and those shown in Table 2. Next, while stirring the inside of a polyethylene beaker (2.0 liters) containing water with a mixer, the SL composition (1 kg) was added so that the water / SL composition ratio was 0.26, and kneaded for 3 minutes. A mortar was obtained. The flow value of the mortar was measured and further cured, and the compressive strength and surface condition after 28 days of age were evaluated. The results are shown in Table 3. (Curing under an environment of 5 ° C and 65% humidity)
Claims (6)
主成分はポルトランドセメント１００質量部、骨材１５０〜３５０質量部、混和材０質量部を超えて２０質量部未満及び膨張材０〜４０質量部からなり、
硫酸アルミニウムはセメントと骨材との合計量（１００質量％）に対して０．１〜０．７質量％含むことを特徴とするセルフレベリング性水硬性組成物。 A self-leveling hydraulic composition comprising a main component, aluminum sulfate, a shrinkage reducing agent, fibers, and resin powder ;
The main component consists of 100 parts by weight of Portland cement, 150 to 350 parts by weight of aggregate, 0 parts by weight of admixture and less than 20 parts by weight and 0 to 40 parts by weight of expansion material,
A self-leveling hydraulic composition comprising 0.1 to 0.7% by mass of aluminum sulfate relative to the total amount (100% by mass) of cement and aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005220257A JP4715368B2 (en) | 2005-07-29 | 2005-07-29 | Self-leveling hydraulic composition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265105A (en) * | 2018-10-15 | 2019-01-25 | 张家界万众新型建筑材料有限公司 | A kind of high-performance ground self-leveling dry-mixed mortar and application method |
| CN110818367A (en) * | 2019-10-15 | 2020-02-21 | 大同冀东水泥有限责任公司 | Cement-based repair mortar composition and preparation method thereof |
| CN111960785A (en) * | 2020-08-13 | 2020-11-20 | 中国建筑第八工程局有限公司 | Low-grout concrete |
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| JP4710884B2 (en) * | 2007-03-13 | 2011-06-29 | 宇部興産株式会社 | Self-flowing hydraulic composition |
| JP2008247666A (en) * | 2007-03-30 | 2008-10-16 | Ube Ind Ltd | Self-leveling hydraulic composition |
| JP2008248554A (en) * | 2007-03-30 | 2008-10-16 | Ube Ind Ltd | Method of constructing concrete structure |
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| JP5407986B2 (en) * | 2010-03-29 | 2014-02-05 | 宇部興産株式会社 | Self-leveling hydraulic composition |
| JP5471723B2 (en) * | 2010-03-31 | 2014-04-16 | 宇部興産株式会社 | Construction method of concrete structure |
| CN102140026A (en) * | 2010-10-22 | 2011-08-03 | 中国建筑科学研究院 | Self-levelling material and preparation method thereof |
| KR101501552B1 (en) * | 2013-06-04 | 2015-03-11 | 코오롱글로벌 주식회사 | Grout composition and construction method for offshore wind power generation facility using the same |
| CN112125601A (en) * | 2020-11-11 | 2020-12-25 | 海南瑞宸新型建材有限公司 | Low-cost cement self-leveling mortar, preparation method and application method thereof |
| CN114907056A (en) * | 2021-02-07 | 2022-08-16 | 广东山众建筑科技有限公司 | Cement-based self-leveling material and preparation method thereof |
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| CN110818367A (en) * | 2019-10-15 | 2020-02-21 | 大同冀东水泥有限责任公司 | Cement-based repair mortar composition and preparation method thereof |
| CN110818367B (en) * | 2019-10-15 | 2022-06-21 | 大同冀东水泥有限责任公司 | Cement-based repair mortar composition and preparation method thereof |
| CN111960785A (en) * | 2020-08-13 | 2020-11-20 | 中国建筑第八工程局有限公司 | Low-grout concrete |
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