JP4387280B2 - Stucco composition - Google Patents

Stucco composition Download PDF

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JP4387280B2
JP4387280B2 JP2004296311A JP2004296311A JP4387280B2 JP 4387280 B2 JP4387280 B2 JP 4387280B2 JP 2004296311 A JP2004296311 A JP 2004296311A JP 2004296311 A JP2004296311 A JP 2004296311A JP 4387280 B2 JP4387280 B2 JP 4387280B2
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plaster
composition
calcium hydroxide
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JP2006104039A (en
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実 盛岡
康二 奥山
賢司 山本
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Denka Co Ltd
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Denki Kagaku Kogyo KK
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Description

本発明は、主に、土木・建築業界において使用される漆喰用組成物に関する。   The present invention mainly relates to a stucco composition used in the civil engineering and construction industries.

なお、本発明における部や%は特に規定しない限り質量基準で示す。   In the present invention, “parts” and “%” are based on mass unless otherwise specified.

漆喰(しっくい)の歴史は古く、水酸化カルシウムを主成分とする組成物を水で練り混ぜてペースト状にしたものを塗りつけて使用している。
漆喰は、石灰石(炭酸カルシウム)を焼成して生石灰(酸化カルシウム)とし、これを水和させた消石灰(水酸化カルシウム)を主成分とし、気中の炭酸ガスと反応して硬化する。これは次式で示される炭酸化反応と呼ばれる反応に起因している。
Ca(OH)2 + CO2 → CaCO3 + H2O
しかしながら、漆喰は、ポルトランドセメントのように水和硬化する材料ではないため、練り混ぜた水は乾燥して逸散し、このため乾燥収縮が顕著となる。
また、乾燥収縮に加えて、炭酸化反応によって、水酸化カルシウムが炭酸カルシウムに変化する際に脱水が生じ、その水分が逸散することによって収縮する。そのため、ひび割れが発生しやすいという課題があった。ひび割れは美観を損ねることなどからその改善が求められている。
Plaster has a long history, and it is used by applying a paste that is a mixture of calcium hydroxide as a main component mixed with water.
Stucco is calcined limestone (calcium carbonate) into quick lime (calcium oxide), hydrated slaked lime (calcium hydroxide) as a main component, and hardens by reacting with atmospheric carbon dioxide. This is caused by a reaction called a carbonation reaction represented by the following formula.
Ca (OH) 2 + CO 2 → CaCO 3 + H 2 O
However, since plaster is not a material that hydrates and hardens like Portland cement, the kneaded water is dried and dissipated, and drying shrinkage becomes significant.
Further, in addition to drying shrinkage, dehydration occurs when calcium hydroxide changes to calcium carbonate by the carbonation reaction, and shrinkage occurs due to the dissipation of the moisture. For this reason, there is a problem that cracks are likely to occur. Cracks are required to be improved because they detract from aesthetics.

また、漆喰は、表面硬度が低く、壁の質感を損ねる粉噴き現象、いわゆるフレーキングを起こすという課題もある。
漆喰の硬化後の圧縮強度はせいぜい1〜5N/mm2程度であり、セメントコンクリートの圧縮強度の1/25のレベルである。
In addition, plaster has a problem that it has a low surface hardness and causes a so-called flaking phenomenon that impairs the texture of the wall.
The compression strength of the plaster after curing is at most about 1 to 5 N / mm 2, which is 1/25 of the compressive strength of cement concrete.

漆喰は、前述したように、強度が低いため、構造上機械的強度を担う重要な部位への適用ができないものであった。もし、漆喰の強度発現性を高めることができれば、その強度発現性を生かした用途への利用も可能になる。このような観点からも強度発現性に優れる漆喰組成物の開発が望まれている。従来より、漆喰用の組成物としては様々な提案がなされている(特許文献1〜特許文献8)。   As described above, plaster has a low strength, and thus cannot be applied to an important part that bears mechanical strength in terms of structure. If the strength development of the plaster can be increased, it can be used for applications that make use of the strength development. From such a viewpoint, development of a plaster composition excellent in strength development is desired. Conventionally, various proposals have been made as a composition for plaster (Patent Documents 1 to 8).

そこで、本発明者は、前記課題を解決すべく、種々の努力を重ねた結果、特定の物質を含有する漆喰組成物が従来の漆喰が持つ課題を解決できることを知見し、本発明を完成するに至った。   Therefore, as a result of making various efforts to solve the above problems, the present inventor has found that a plaster composition containing a specific substance can solve the problems of conventional plaster, and completes the present invention. It came to.

本発明は、漆喰のもつ利点を損なうことなく、課題を解消したものである。   The present invention solves the problem without impairing the advantages of plaster.

特開昭54−013537号公報Japanese Patent Laid-Open No. 54-013537 特開昭54−043930号公報JP 54-043930 A 特開昭54−085226号公報Japanese Patent Laid-Open No. 54-085226 特開昭54−105132号公報JP 54-105132 A 特開昭55−090451号公報JP-A-55-090451 特開昭60−016855号公報JP-A-60-016855 特開昭61−195171号公報JP-A-61-195171 特開平07−196355号公報Japanese Patent Application Laid-Open No. 07-196355

本発明はひび割れやフレーキングを生じにくく、一度に厚塗りが可能な漆喰組成物を、また、強度発現性を著しく改善した漆喰用組成物を提供する。   The present invention provides a stucco composition that is unlikely to cause cracking or flaking and can be thickly coated at once, and a stucco composition that has significantly improved strength development.

本発明は、ブレーン比表面積値が4,000cm 2 /g以上のγ型2CaO・SiO2と水酸化カルシウムとを含有してなる漆喰用組成物であり、γ型2CaO・SiO2と水酸化カルシウムの合計100部中、γ型2CaO・SiO2が20〜70部である該漆喰用組成物であり、さらに、増粘剤、繊維物質、分散剤、及び消泡剤からなる群より選ばれた一種又は二種以上の添加剤を含有する該漆喰用組成物であり、さらに、粘土鉱物、シリカ微粉末、及びポリマーからなる群より選ばれた一種又は二種以上の添加剤を含有する該漆喰用組成物であり、該漆喰用組成物と水とを含有してなる漆喰であり、水の配合割合が、漆喰用組成物100部に対して、30〜100部である該漆喰であり、該漆喰を用いてなる硬化体である。 The present invention is a composition for stucco comprising γ-type 2CaO · SiO 2 having a Blaine specific surface area value of 4,000 cm 2 / g or more and calcium hydroxide, and comprising γ- type 2CaO · SiO 2 and calcium hydroxide. The total amount of 100 parts is a composition for plaster in which γ-type 2CaO · SiO 2 is 20 to 70 parts, and further, a kind selected from the group consisting of thickeners, fiber materials, dispersants, and antifoaming agents Or the composition for plaster containing two or more additives, and further for the plaster containing one or more additives selected from the group consisting of clay mineral, silica fine powder, and polymer The composition is a stucco containing the composition for stucco and water, and the mixing ratio of water is 30-100 parts per 100 parts of the composition for stucco, the stucco, It is a cured body made of plaster.

本発明のγ型2CaO・SiO2とは、2CaO・SiO2と表されるダイカルシウムシリケートのなかで、低温相のγ型のものである。
ダイカルシウムシリケートには、α型、αプライム型、β型、及びγ型が存在する。γ型2CaO・SiO2は、α型、αプライム型、及びβ型とは全く異なる結晶構造を持つ。また、α型、αプライム型、及びβ型のダイカルシウムシリケートは、水硬性を持つため、あらかじめ、水と混練して調製される漆喰組成物とすることができない。
The γ-type 2CaO · SiO 2 of the present invention is a γ-type in a low temperature phase among dicalcium silicates represented as 2CaO · SiO 2 .
Dicalcium silicate includes α-type, α-prime type, β-type, and γ-type. γ-type 2CaO · SiO 2 has a completely different crystal structure from α-type, α-prime type, and β-type. In addition, since α-type, α-prime type, and β-type dicalcium silicates have hydraulic properties, they cannot be made into a stucco composition prepared by kneading with water in advance.

γ型2CaO・SiO2の(以下、γC2Sという)粉末度は、ブレーン比表面積値(以下、ブレーン値という)で4,000cm2/g以上が好ましく、6,000cm2/g以上がより好ましい。4,000cm2/g未満では、作業性が悪くなったり、強度発現性が悪くなる場合がある。また、ひび割れが生じやすい場合もある。 of γ-type 2CaO · SiO 2 (hereinafter, rC referred 2 S) fineness, Blaine specific surface area value (hereinafter, referred to as Blaine value) is preferably at least 4,000 cm 2 / g in, 6,000 2 / g or more is more preferable. If it is less than 4,000 cm 2 / g, workability may deteriorate and strength development may deteriorate. In some cases, cracks are likely to occur.

本発明では、γC2Sのほかに水酸化カルシウムを併用する。
水酸化カルシウムは、石灰石(炭酸カルシウム:CaCO3)を焼成処理して得られる生石灰(酸化カルシウム:CaO)を水と反応させて(消化させて)消石灰(水酸化カルシウム:Ca(OH)2)としたものであり、本発明ではいかなる水酸化カルシウムも使用可能であるが、塩焼という手法で焼成処理された生石灰を消化させて得られる水酸化カルシウムの使用が、作業性の面や硬化後の均一性の面等から好ましい。
In the present invention, calcium hydroxide is used in combination with γC 2 S.
Calcium hydroxide is slaked lime (calcium hydroxide: Ca (OH) 2 ) by reacting (digesting) quick lime (calcium oxide: CaO) obtained by baking limestone (calcium carbonate: CaCO 3 ) with water. In the present invention, any calcium hydroxide can be used. However, the use of calcium hydroxide obtained by digesting quick lime that has been fired by the method of salt firing is advantageous in terms of workability and after hardening. It is preferable from the aspect of uniformity.

γC2Sと水酸化カルシウムの配合割合は、γC2Sと水酸化カルシウムとの合計100部中、γC2S20〜70部で、水酸化カルシウム80〜30部が好ましく、γC2S30〜60部で、水酸化カルシウム70〜40部がより好ましい。γC2Sが20部未満で、水酸化カルシウムが80部を超えると、ひび割れが生じやすくなったり、配合する水量が多くなって強度発現性が悪くなる場合がある。逆に、γC2Sが70部を超え、水酸化カルシウムが30部未満では、炭酸化速度が遅くなり、強度発現性が悪くなる場合があり、また、コテ作業がしにくくなる場合がある。 rC 2 mixing ratio of S with calcium hydroxide, in sum 100 parts of calcium hydroxide and rC 2 S, in γC 2 S20~70 parts, 80 to 30 parts of calcium hydroxide are preferred, γC 2 S30~60 parts And 70-40 parts of calcium hydroxide is more preferable. If γC 2 S is less than 20 parts and calcium hydroxide exceeds 80 parts, cracks are likely to occur, or the amount of water to be added increases and the strength developability may deteriorate. On the other hand, when γC 2 S exceeds 70 parts and calcium hydroxide is less than 30 parts, the carbonation rate is slow, strength development may be deteriorated, and the ironing work may be difficult.

本発明では、γC2Sと水酸化カルシウムのほかに、増粘剤、繊維物質、分散剤、及び消泡剤からなる群より選ばれた一種又は二種以上の添加剤を、さらに、粘土鉱物、シリカ微粉末、及びポリマーからなる群より選ばれた一種又は二種以上の添加剤を併用することが好ましい。 In the present invention, in addition to γC 2 S and calcium hydroxide, one or more additives selected from the group consisting of thickeners, fiber materials, dispersants, and antifoaming agents, It is preferable to use one or two or more additives selected from the group consisting of silica fine powder and polymer.

増粘剤は、保水性やダレの防止効果の役割を担うもので、例えば、セルロース系増粘剤、多糖類系増粘剤、アクリル系増粘剤、アルギン酸ナトリウム、カゼイン酸ナトリウム、ポバール系糊剤、及び海藻糊等の天然系糊剤等が挙げられる。
増粘剤の使用量は、γC2Sと水酸化カルシウムの合計100部に対して、0.01〜2部が好ましい。0.01部未満では保水性やダレの防止効果が充分でない場合があり、逆に2部を超えると粘性が強くなりすぎてコテはけ性が悪くなる場合がある。
Thickeners play a role in water retention and sagging prevention effects, such as cellulosic thickeners, polysaccharide thickeners, acrylic thickeners, sodium alginate, sodium caseinate, poval glue. And natural pastes such as seaweed paste and the like.
The amount of thickener used is preferably 0.01 to 2 parts with respect to 100 parts in total of γC 2 S and calcium hydroxide. If it is less than 0.01 parts, the water retention and dripping prevention effects may not be sufficient, while if it exceeds 2 parts, the viscosity may become too strong and the iron peelability may be deteriorated.

繊維物質は、ひび割れの抑制やコテ伸び性等の役割を担うもので、例えば、パルプ質繊維、セルロース繊維、アクリル繊維、ポリエステル繊維、及びビニロン繊維等の化学繊維、さらには、麻、わら、及び紙等の、また、はますさ、白毛すさ、南京すさ、さらしすさ、油すさ、及び紙すさなどと呼ばれる各種の「すさ」の天然繊維が使用可能である。なかでも、柔らかい繊維物質の使用が好ましく、セルロース繊維や天然繊維が好ましい。
繊維物質の使用量は、γC2Sと水酸化カルシウムの合計100部に対して、0.5〜3部が好ましい。0.5部未満ではひび割れの抑制やコテ伸び性等の改善効果が期待できない場合があり、3部を超えると粘性が強くなる場合があり、逆にコテ仕上げ性が悪くなる場合がある。
The fiber material plays a role such as crack suppression and iron elongation, for example, chemical fibers such as pulp fiber, cellulose fiber, acrylic fiber, polyester fiber, and vinylon fiber, as well as hemp, straw, and Various “susa” natural fibers such as paper, called “masashi”, “white hair”, “nanjing”, “exposed”, “oil”, and “paper” can be used. Of these, the use of soft fiber materials is preferred, and cellulose fibers and natural fibers are preferred.
The amount of the fiber material used is preferably 0.5 to 3 parts with respect to 100 parts in total of γC 2 S and calcium hydroxide. If it is less than 0.5 part, the effect of suppressing cracking and improving the iron elongation may not be expected. If it exceeds 3 parts, the viscosity may be increased, and the iron finish may be deteriorated.

分散剤は、配合する水の量を低減し、強度発現性やひび割れ抵抗性を改善する役割を担うもので、例えば、ナフタレン系、メラミン系、リグニン系、及びポリカルボン酸系等が挙げられる。なかでも、ポリカルボン酸系分散剤の使用が分散効果の面から好ましい。
分散剤の使用量は、γC2Sと水酸化カルシウムの合計100部に対して、0.1〜2部が好ましい。0.1部未満では、強度発現性やひび割れ抵抗性を改善する効果が充分でない場合があり、2部を超えると材料分離を生じて色ムラの原因となる場合がある。
The dispersant plays a role of reducing the amount of water to be blended and improving strength development and crack resistance, and examples thereof include naphthalene, melamine, lignin, and polycarboxylic acid. Of these, the use of a polycarboxylic acid-based dispersant is preferable from the viewpoint of the dispersion effect.
The amount of the dispersant used is preferably 0.1 to 2 parts with respect to 100 parts in total of γC 2 S and calcium hydroxide. If it is less than 0.1 part, the effect of improving strength development and crack resistance may not be sufficient, and if it exceeds 2 parts, material separation may occur and cause color unevenness.

消泡剤は、ムラの防止や緻密性を向上させる役割を担うもので、例えば、アクリル系、アマイド系、ポリエーテル系、シリコーン系、及び金属石鹸系等を挙げることができる。
消泡剤の使用量は、γC2Sと水酸化カルシウムの合計100部に対して、0.1〜2部が好ましい。0.1部未満ではムラの防止や緻密性を確保する効果が充分に得られない場合があり、2部を超えて使用してもさらなる効果の増進が期待できない。
The antifoaming agent plays a role of preventing unevenness and improving the denseness, and examples thereof include acrylic, amide, polyether, silicone, and metal soap.
The used amount of the antifoaming agent is preferably 0.1 to 2 parts with respect to 100 parts in total of γC 2 S and calcium hydroxide. If it is less than 0.1 part, the effect of preventing unevenness and ensuring the denseness may not be sufficiently obtained, and even if it exceeds 2 parts, further enhancement of the effect cannot be expected.

粘土鉱物は、コテ伸び性や保水性、調湿性等の役割を担うもので、例えば、ベントナイト、ゼオライト、バーミキュライト、セピオライト、及びアタパルジャイトなどを挙げることができる。また、これら粘土鉱物に銅や銀といった抗菌金属を担持させることによって抗菌・抗カビ性を付与することも可能である。
粘土鉱物の使用量は、γC2Sと水酸化カルシウムの合計100部に対して、1〜30部が好ましい。1部未満では、コテ伸び性、保水性、調湿性、及び抗菌・抗カビ性等の効果が期待できない場合があり、30部を超えると作業性が悪くなったり、配合する水の量が増して強度発現性やひび割れ抵抗性が悪くなる場合がある。
The clay mineral plays a role of iron elongation, water retention, humidity control, etc., and examples thereof include bentonite, zeolite, vermiculite, sepiolite, and attapulgite. It is also possible to impart antibacterial and antifungal properties by supporting these clay minerals with antibacterial metals such as copper and silver.
The amount of the clay mineral used is preferably 1 to 30 parts with respect to 100 parts in total of γC 2 S and calcium hydroxide. If the amount is less than 1 part, effects such as iron elongation, water retention, moisture conditioning, and antibacterial / antifungal properties may not be expected. As a result, strength development and crack resistance may deteriorate.

シリカ微粉末は、コテ伸び性やダレ防止等の役割を担うとともに、強度発現性も改善するもので、例えば、シリカフューム、フライアッシュ、高炉スラグ、籾殻灰、珪藻土、活性白土、シラス、火山灰、及び廃ガラス粉末等を挙げることができる。なかでも、シリカフュームの使用が好ましい。
シリカ微粉末の使用量は、γC2Sと水酸化カルシウムの合計100部に対して、1〜20部が好ましい。1部未満では、コテ伸び性、ダレ防止、及び強度発現性の改善効果が期待できない場合があり、20部を超えると粘性が強くなって作業性が悪くなったり、収縮が大きくなってひび割れ抵抗性が悪くなる場合がある。
Silica fine powder plays a role such as iron elongation and prevention of sag and improves strength development. For example, silica fume, fly ash, blast furnace slag, rice husk ash, diatomaceous earth, activated white clay, shirasu, volcanic ash, and Examples thereof include waste glass powder. Of these, the use of silica fume is preferred.
The amount of silica fine powder used is preferably 1 to 20 parts with respect to 100 parts in total of γC 2 S and calcium hydroxide. If it is less than 1 part, it may not be possible to expect the effect of improving the iron elongation, sagging prevention, and strength development. If it exceeds 20 parts, the viscosity becomes strong and the workability deteriorates, and the shrinkage increases and crack resistance increases. May be worse.

ポリマーは、付着性を高める他、ひび割れを抑制する役割を担うもので、例えば、酢酸ビニル系、酢酸ビニル-アクリル系、エチレン−酢酸ビニル系、アクリル−スチレン系、アクリル系、エポキシ系、アルキド系、及びアクリル−アルキド系等の各種エマルジョンや、天然ゴムラテックス、クロロプレンゴム系ラテックス、及びスチレンブタジエンゴム系ラテックスなどの各種ラテックスが挙げられる。
ポリマーの使用量は、γC2Sと水酸化カルシウムの合計100部に対して、固形分換算で1〜20部が好ましい。1部未満では付着性を高めたり、ひび割れを抑制するなどの効果が充分に得られない場合があり、20部を超えて使用してもさらなる効果の増進が期待できない。
In addition to enhancing adhesion, the polymer plays a role of suppressing cracking. For example, vinyl acetate, vinyl acetate-acrylic, ethylene-vinyl acetate, acrylic-styrene, acrylic, epoxy, alkyd And various emulsions such as acrylic-alkyd type and various latexes such as natural rubber latex, chloroprene rubber type latex, and styrene butadiene rubber type latex.
The amount of the polymer used is preferably 1 to 20 parts in terms of solid content with respect to 100 parts in total of γC 2 S and calcium hydroxide. If the amount is less than 1 part, effects such as enhancing adhesion and suppressing cracking may not be obtained sufficiently, and even if it exceeds 20 parts, further enhancement of the effect cannot be expected.

なお、本発明では、顔料を併用することも可能である。
顔料は、色調を与え、意匠性や景観性を付与する役割を担うもので、例えば、ベンガラ、カーボンブラック、フタロシアニンブルー、及びフタロシアニングリーンなどが挙げられる。
顔料の使用量は、γC2Sと水酸化カルシウムの合計100部に対して、0.1〜3部が好ましい。0.1部未満では色調を与える効果が充分でない場合があり、3部を超えて使用してもさらなる効果の増進が期待できない。
In the present invention, a pigment can be used in combination.
The pigment has a role of imparting color tone and imparting design and landscape properties, and examples thereof include Bengala, carbon black, phthalocyanine blue, and phthalocyanine green.
The amount of the pigment used is preferably 0.1 to 3 parts with respect to 100 parts in total of γC 2 S and calcium hydroxide. If it is less than 0.1 part, the effect of giving color tone may not be sufficient, and even if it exceeds 3 parts, further enhancement of the effect cannot be expected.

本発明では、さらに、石灰石微粉末、アルコール類、エチレングリコール類、防錆剤、防凍剤、及び収縮低減剤等のうちの一種又は二種以上を、本発明の目的を実質的に阻害しない範囲で使用することが可能である。   In the present invention, further, one or more of limestone fine powder, alcohols, ethylene glycols, rust preventives, antifreezes, shrinkage reducing agents, etc., in a range that does not substantially impair the object of the present invention. Can be used.

本発明の漆喰用組成物中の水の量は特に限定されるものではないが、通常、水以外の構成材料からなる固形分100部に対して、30〜100部が好ましく、40〜75部がより好ましい。30部未満では作業性が充分でない場合があり、100部を超えるとひび割れが生じやすくなったり、強度発現性が低下する場合あがる。   The amount of water in the plaster composition of the present invention is not particularly limited, but is usually 30 to 100 parts, preferably 40 to 75 parts with respect to 100 parts of a solid content composed of a constituent material other than water. Is more preferable. If it is less than 30 parts, workability may not be sufficient, and if it exceeds 100 parts, cracking tends to occur or strength development may be reduced.

本発明の漆喰用組成物は、下地材(素地材)を制限するものではなく、例えば、コンクリート、セッコウプラスター、ドロマイトプラスター、石綿スレート、セッコウボード、漆喰壁、土壁、ケイ酸カルシウム板、GRC、木毛セメント板、及び金属等の無機系素地材、プラスチックや塩化ビニルなどの有機系素地材が挙げられる。   The composition for plaster of this invention does not restrict | limit a base material (base material), For example, concrete, gypsum plaster, dolomite plaster, asbestos slate, gypsum board, plaster wall, earth wall, calcium silicate board, GRC , Wood wool cement boards, and inorganic base materials such as metals, and organic base materials such as plastic and vinyl chloride.

本発明の漆喰用組成物は自然に炭酸化を受けて硬化する、一種の気硬材料であるが、意図的に強制炭酸化処理しても差し支えない。
炭酸化処理の手段としては、炭酸ガス、超臨界二酸化炭素、及びドライアイスなどを利用する手法が挙げられる。
The plaster composition of the present invention is a kind of air-hardened material that naturally undergoes carbonation and cures, but it may be intentionally subjected to forced carbonation.
Examples of the carbonation treatment include carbon dioxide, supercritical carbon dioxide, and dry ice.

本発明の漆喰用組成物は、ひび割れやフレーキングを生じにくく、一度に厚塗りが可能となり、その質感も滑らかで艶やかで、強度発現性を著しく改善した硬化体を提供する。   The plaster composition of the present invention provides a cured product that is less likely to cause cracking and flaking, can be thickly coated at once, has a smooth and glossy texture, and has significantly improved strength development.

表1に示すγC2Sと水酸化カルシウム、γC2Sと水酸化カルシウムの合計100部に対して、増粘剤0.5部、繊維物質1.5部、分散剤1部、及び消泡剤0.3部を配合した漆喰用組成物と、該漆喰用組成物100部に対して、50部の水とを混合して漆喰を調製し、コンクリート板に厚さ3mmで塗りつけた。その際のコテ作業性、ひび割れ抵抗性、及びフレーキングの観察を行い、硬度を測定した。結果を表1に併記する。 Table rC 2 S and calcium hydroxide shown in 1, per 100 parts of calcium hydroxide and rC 2 S, 0.5 parts of a thickener, 1.5 parts of fibrous material, 1 part dispersing agent, and a defoaming agent 0.3 parts Stucco was prepared by mixing 50 parts of water with respect to the blended stucco composition and 100 parts of the stucco composition, and applied to a concrete plate with a thickness of 3 mm. At that time, the iron workability, crack resistance, and flaking were observed, and the hardness was measured. The results are also shown in Table 1.

<使用材料>
γC2S :炭酸カルシウムとシリカを2対1のモル比で混合し、1,500℃で3時間焼成して合成、ブレーン値6,000cm2/g
水酸化カルシウム:市販品、塩焼製法によるもの
増粘剤 :メチルセルロース系増粘剤、市販品
繊維物質 :セルロース繊維、市販品
分散剤 :ポリカルボン酸系分散剤、市販品
消泡剤 :シリカシリコーン系消泡剤、市販品
水 :水道水
<Materials used>
γC 2 S: Calcium carbonate and silica are mixed at a molar ratio of 2: 1 and synthesized by firing at 1,500 ° C. for 3 hours, with a brain value of 6,000 cm 2 / g
Calcium hydroxide: Commercial product, Thickener by salt baking method: Methyl cellulose thickener, Commercial fiber material: Cellulose fiber, Commercial dispersant: Polycarboxylic acid dispersant, Commercial defoamer: Silica silicone Defoamer, commercial water: tap water

<試験方法>
コテ作業性:コテ伸び性やコテへのくっ付き具合を総合的に評価し、良好は○、やや難は△、不良は×
ひび割れ抵抗性:所定の材齢においてひび割れの発生状況を観察、ひび割れ発生なしは○、ひび割れが発生した場合は×
硬度 :ビッカース硬度計を用いて測定、ただし、測定点数5点の平均値。
フレーキング:フレーキングがない場合は○、やや認められる場合は△、フレーキングが顕著に見られる場合は×
<Test method>
Iron workability: Comprehensive evaluation of iron elongation and sticking to the iron, good for good, slightly difficult for △, poor for x
Crack resistance: Observe the occurrence of cracks at a given age, ○ if no cracks occur, × if cracks occur
Hardness: Measured using a Vickers hardness tester, but the average value of 5 measurement points.
Flaking: ○ if there is no flaking, △ if it is slightly recognized, × if flaking is noticeable

Figure 0004387280
Figure 0004387280

γC2S40部、水酸化カルシウム部60部、増粘剤0.5部、繊維物質1.5部、及び消泡剤0.3部と表2に示す分散剤、シリカ物質、粘土鉱物、及びポリマーを配合したこと以外は実施例1と同様に行った。結果を表2に併記する。 Other than blending 40 parts of γC 2 S, 60 parts of calcium hydroxide, 0.5 parts of thickener, 1.5 parts of fiber material, 0.3 parts of antifoaming agent, and the dispersant, silica substance, clay mineral, and polymer shown in Table 2. Was carried out in the same manner as in Example 1. The results are also shown in Table 2.

<使用材料>
シリカ微粉末:シリカフューム、市販品
粘土鉱物 :銅と銀を担持した抗菌ゼオライト、市販品
ポリマー :アクリル−酢酸ビニル系、市販品
<Materials used>
Silica fine powder: Silica fume, commercial product clay mineral: antibacterial zeolite carrying copper and silver, commercial product polymer: acrylic-vinyl acetate system, commercial product

Figure 0004387280
Figure 0004387280

γC2S40部、水酸化カルシウム部60部、増粘剤0.5部、繊維物質1.5部、分散剤1部、及び消泡剤0.3部からなる漆喰用組成物において、表3に示すブレーン値のγC2Sを使用したこと以外は実施例1と同様に行った。結果を表3に併記する。 In the composition for plaster composed of 40 parts of γC 2 S, 60 parts of calcium hydroxide, 0.5 part of thickener, 1.5 parts of fiber material, 1 part of dispersant, and 0.3 part of antifoaming agent, γC having the brain values shown in Table 3 The same operation as in Example 1 was performed except that 2 S was used. The results are also shown in Table 3.

Figure 0004387280
Figure 0004387280

γC2S40部、水酸化カルシウム部60部、増粘剤0.5部、繊維物質1.5部、及び消泡剤0.3部と、表4に示す分散剤とからなる漆喰用組成物100部に対して、表4に示す水を用いたこと以外は実施例1と同様に行った。結果を表4に併記する。 40 parts of γC 2 S, 60 parts of calcium hydroxide, 0.5 part of thickener, 1.5 parts of fiber material, 0.3 part of antifoaming agent, and 100 parts of the composition for stucco comprising the dispersant shown in Table 4, It carried out similarly to Example 1 except having used the water shown in Table 4. The results are also shown in Table 4.

Figure 0004387280
Figure 0004387280

γC2S40部、水酸化カルシウム部60部、増粘剤0.5部、繊維物質1.5部、及び消泡剤0.3部と、表5に示す分散剤、シリカ物質、粘土鉱物、及びポリマーからなる漆喰用組成物と、該漆喰用組成物100部に対して、50部の水とを混合して漆喰を調製し、カビ抵抗性を観察したこと以外は実施例1と同様に行った。結果を表5に併記する。 40 parts for γC 2 S, 60 parts for calcium hydroxide, 0.5 part for thickener, 1.5 parts for fiber material, 0.3 part for antifoaming agent, and for plaster made of dispersant, silica substance, clay mineral, and polymer shown in Table 5 The same procedure was performed as in Example 1 except that 50 parts of water was mixed with the composition and 100 parts of the stucco composition to prepare a stucco, and the mold resistance was observed. The results are also shown in Table 5.

<評価方法>
カビ抵抗性:施工後91日経過した時点でカビ種A(クラドスポリウム・クラドスポリオイデス)とカビ種B(アスペルギルス・ニゲル)の胞子懸濁液を塗布し、4週間にわたってカビ抵抗性試験をJIS Z 2911に準じて行った。カビ抵抗性の×は1/3を超える面積にわたってカビ発生、△は1/3以下の面積においてカビ発生、○はカビの発生なし
<Evaluation method>
Mold resistance: When 91 days have passed since construction, a spore suspension of mold species A (Cladosporium cladosporioides) and mold species B (Aspergillus niger) was applied, and the mold resistance test was conducted for 4 weeks. Was performed according to JIS Z 2911. Mold resistance x indicates mold generation over an area exceeding 1/3, Δ indicates mold generation in an area of 1/3 or less, and ○ indicates no mold generation

Figure 0004387280
Figure 0004387280

本発明の漆喰用組成物は、ひび割れを生じにくく、一度に厚塗りが可能で、強度発現性にも優れ、フレーキングも生じないので、建築分野に広範に適用できる。   The composition for stucco of the present invention is not easily cracked, can be thickly coated at once, is excellent in strength development, and does not cause flaking, so that it can be widely applied in the construction field.

Claims (7)

ブレーン比表面積値が4,000cm 2 /g以上のγ型2CaO・SiO2と水酸化カルシウムとを含有してなる漆喰用組成物。 A stucco composition comprising γ-type 2CaO · SiO 2 having a Blaine specific surface area value of 4,000 cm 2 / g or more and calcium hydroxide. γ型2CaO・SiO2と水酸化カルシウムの合計100部中、γ型2CaO・SiO2が20〜70部であることを特徴とする請求項1に記載の漆喰用組成物。 During a total of 100 parts of γ-type 2CaO · SiO 2 and calcium hydroxide, plaster composition according to claim 1, γ-type 2CaO · SiO 2 is characterized in that 20 to 70 parts. さらに、増粘剤、繊維物質、分散剤、及び消泡剤からなる群より選ばれた一種又は二種以上の添加剤を含有することを特徴とする請求項1又は請求項2に記載の漆喰用組成物。 Furthermore, the plaster of Claim 1 or Claim 2 containing the 1 type, or 2 or more types of additive chosen from the group which consists of a thickener, a fiber substance, a dispersing agent, and an antifoamer. Composition. さらに、粘土鉱物、シリカ微粉末、及びポリマーからなる群より選ばれた一種又は二種以上の添加剤を含有することを特徴とする請求項に記載の漆喰用組成物。 The plaster composition according to claim 3 , further comprising one or more additives selected from the group consisting of clay minerals, fine silica powder, and a polymer. 請求項1〜請求項のうちの一項に記載の漆喰用組成物と水とを含有してなる漆喰。 Claim 1 plaster which comprises a water stucco composition according to one of claims 4. 水の配合割合が、漆喰用組成物100部に対して、30〜100部であることを特徴とする請求項項に記載の漆喰。 The blending ratio of water is 30 to 100 parts with respect to 100 parts of the composition for plaster, The plaster according to claim 5 . 請求項又は請求項に記載の漆喰を用いてなる硬化体。 The hardening body which uses the plaster of Claim 5 or Claim 6 .
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