JP2008156153A - Method for preventing dryout in polymer cement composition - Google Patents
Method for preventing dryout in polymer cement composition Download PDFInfo
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- JP2008156153A JP2008156153A JP2006345730A JP2006345730A JP2008156153A JP 2008156153 A JP2008156153 A JP 2008156153A JP 2006345730 A JP2006345730 A JP 2006345730A JP 2006345730 A JP2006345730 A JP 2006345730A JP 2008156153 A JP2008156153 A JP 2008156153A
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- 239000000203 mixture Substances 0.000 title claims abstract description 46
- 239000011414 polymer cement Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 66
- 229920000642 polymer Polymers 0.000 claims abstract description 43
- 239000004568 cement Substances 0.000 claims abstract description 32
- 125000000129 anionic group Chemical group 0.000 claims abstract description 22
- 229920006317 cationic polymer Polymers 0.000 claims abstract description 10
- 239000011247 coating layer Substances 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 11
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 description 25
- 238000000576 coating method Methods 0.000 description 25
- 239000000463 material Substances 0.000 description 18
- -1 for example Substances 0.000 description 16
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- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 description 1
- HVYJSOSGTDINLW-UHFFFAOYSA-N 2-[dimethyl(octadecyl)azaniumyl]acetate Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)CC([O-])=O HVYJSOSGTDINLW-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
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- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- VBIIFPGSPJYLRR-UHFFFAOYSA-M Stearyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)C VBIIFPGSPJYLRR-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229920004482 WACKER® Polymers 0.000 description 1
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- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 description 1
- 229940063953 ammonium lauryl sulfate Drugs 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- PLUHAVSIMCXBEX-UHFFFAOYSA-N azane;dodecyl benzenesulfonate Chemical compound N.CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 PLUHAVSIMCXBEX-UHFFFAOYSA-N 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
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- TWFQJFPTTMIETC-UHFFFAOYSA-N dodecan-1-amine;hydron;chloride Chemical compound [Cl-].CCCCCCCCCCCC[NH3+] TWFQJFPTTMIETC-UHFFFAOYSA-N 0.000 description 1
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- QGVQVNIIRBPOAM-UHFFFAOYSA-N dodecyl naphthalene-1-sulfonate;sodium Chemical compound [Na].C1=CC=C2C(S(=O)(=O)OCCCCCCCCCCCC)=CC=CC2=C1 QGVQVNIIRBPOAM-UHFFFAOYSA-N 0.000 description 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 1
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
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- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
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- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 description 1
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- UPHWVVKYDQHTCF-UHFFFAOYSA-N octadecylazanium;acetate Chemical compound CC(O)=O.CCCCCCCCCCCCCCCCCCN UPHWVVKYDQHTCF-UHFFFAOYSA-N 0.000 description 1
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- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
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- Application Of Or Painting With Fluid Materials (AREA)
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Abstract
Description
本発明は、モルタル・コンクリート表面に発生するドライアウトを防止できるポリマーセメント組成物の施工方法及び該施工により得られるセメント硬化体に関する。 The present invention relates to a method for applying a polymer cement composition capable of preventing dryout generated on a mortar / concrete surface, and a hardened cement obtained by the application.
コンクリート躯体にモルタルを薄層で施工する場合、モルタル表面から水分が気散することにより、モルタルがドライアウトし、硬化不良、付着不良等の不具合を起こすことがある。こうした弊害を防ぐために、モルタル中に増粘剤を配合したり、ポリマーエマルションを添加したりする等の処置が行われている。また、モルタルが硬化する前に、エチレン-酢酸ビニル系、スチレン-アクリル系、ＳＢＲ系等のポリマーエマルションやパラフィン等のワックス成分、グリセリン等を塗布し、水分の気散を防止する「塗膜養生」が行われている（例えば特許文献１〜３参照）。 When a mortar is applied to a concrete frame in a thin layer, the mortar may dry out due to the diffusion of moisture from the surface of the mortar, causing problems such as poor curing and poor adhesion. In order to prevent such harmful effects, treatments such as blending a thickener in the mortar or adding a polymer emulsion are performed. Also, before curing the mortar, apply a polymer emulsion such as ethylene-vinyl acetate, styrene-acrylic, SBR, wax components such as paraffin, glycerin, etc. (See, for example, Patent Documents 1 to 3).
しかしながら、ワックス系、グリセリン系、ポリウレタン系等は効果的な塗膜養生材であるが、その撥水性の高さから、モルタル硬化後さらにモルタルを施工する際に十分な一体性が得られないという問題がある。
また、ポリマーエマルションによる塗膜養生は理想的だが、近年粉末樹脂を使用したポリマーセメントモルタルが増えてきており、粉末樹脂の再乳化が必ずしも完全ではないこと、またその作業性の観点から粉末樹脂・増粘剤の添加量が低くなりがちなことから、モルタル自体の保水性が低下する傾向にある。特に乾燥条件下、或いは高温条件下においては、水分蒸発が早いためドライアウトによるひび割れや付着強度の低下が生じ易く、十分な養生効果が得られにくいという問題があった。
In addition, film curing with polymer emulsion is ideal, but in recent years, polymer cement mortar using powder resin has increased, and re-emulsification of powder resin is not always complete, and in terms of workability, Since the addition amount of the thickener tends to be low, the water retention of the mortar itself tends to decrease. In particular, under dry conditions or high temperature conditions, moisture evaporation is fast, so that cracks due to dryout and adhesion strength are liable to occur, and there is a problem that a sufficient curing effect cannot be obtained.
本発明の目的は、厳しい環境下においても水分蒸発を抑制し、ドライアウトによるひび割れや付着不良を生ずることのないポリマーセメント組成物の施工方法及び該施工により得られるセメント硬化体を提供することにある。 An object of the present invention is to provide a construction method of a polymer cement composition that suppresses water evaporation even under severe environments and does not cause cracks or poor adhesion due to dryout, and a cement hardened body obtained by the construction. is there.
本発明者は、塗膜養生に用いるポリマーエマルションについて種々検討したところ、エマルションをモルタル表面に塗布する際、モルタル混和用のエマルションをそのまま用いるか、同性質のエマルションが用いられていることが判明した。すなわち、モルタル混和用のエマルションと塗膜養生に用いるエマルションは、モルタルとの接着性や硬化性、施工性等の点から同じイオン性基を有するものを用いるのが好ましいと考えられていた。そこでさらに検討したところ、全く意外にも、塗膜養生に用いるエマルションとして、モルタル混和用のエマルションと逆性のイオン性基を有するエマルションを用いれば、厳しい環境下においても安定した養生効果が得られ、ドライアウトによるひび割れや付着強度の低下を防止できることを見出し、本発明を完成した。 As a result of various studies on polymer emulsions used for coating film curing, the present inventor has found that, when the emulsion is applied to the surface of the mortar, the emulsion for mixing with the mortar is used as it is or an emulsion having the same properties is used. . That is, it has been considered that it is preferable to use an emulsion for mixing mortar and an emulsion used for coating film curing having the same ionic group from the viewpoints of adhesion to mortar, curability, workability, and the like. Therefore, further investigation revealed that, surprisingly, if an emulsion having an ionic group opposite to that for mortar is used as an emulsion for coating film curing, a stable curing effect can be obtained even in severe environments. The present inventors have found that cracks due to dryout and a decrease in adhesion strength can be prevented.
すなわち、本発明は、カチオン性ポリマーエマルションを含有するポリマーセメント組成物の施工表面に、アニオン性及び／又はノニオン性ポリマーエマルションからなる塗布層を設けてなることを特徴とするセメント硬化体を提供するものである。
また、本発明は、アニオン性及び／又はノニオン性ポリマーエマルションを含有するポリマーセメント組成物の施工表面に、カチオン性ポリマーエマルションからなる塗布層を設けてなることを特徴とするセメント硬化体を提供するものである。
また、本発明は、カチオン性ポリマーエマルションを含有するポリマーセメント組成物を施工した後、セメントが硬化する前に、その施工表面にアニオン性及び／又はノニオン性ポリマーエマルションを塗布することを特徴とするポリマーセメント組成物の施工方法を提供するものである。
さらにまた、本発明は、アニオン性及び／又はノニオン性ポリマーエマルションを含有するポリマーセメント組成物を施工した後、セメントが硬化する前に、その施工表面にカチオン性ポリマーエマルションを塗布することを特徴とするポリマーセメント組成物の施工方法を提供するものである。
That is, the present invention provides a hardened cement body characterized in that a coating layer made of an anionic and / or nonionic polymer emulsion is provided on the surface of a polymer cement composition containing a cationic polymer emulsion. Is.
The present invention also provides a hardened cement body, characterized in that a coating layer made of a cationic polymer emulsion is provided on the construction surface of a polymer cement composition containing an anionic and / or nonionic polymer emulsion. Is.
In addition, the present invention is characterized in that after the polymer cement composition containing the cationic polymer emulsion is applied, the anionic and / or nonionic polymer emulsion is applied to the applied surface before the cement is cured. The construction method of a polymer cement composition is provided.
Furthermore, the present invention is characterized in that after applying a polymer cement composition containing an anionic and / or nonionic polymer emulsion, the cationic polymer emulsion is applied to the applied surface before the cement is cured. The present invention provides a method for applying a polymer cement composition.
本発明によれば、乾燥条件下や高温条件下等の厳しい環境下においても、ドライアウトによるひび割れや付着強度の低下を防止でき、安定した付着性能（引張り強度）を有するセメント硬化体を得ることができる。 According to the present invention, it is possible to prevent cracking due to dry-out and a decrease in adhesion strength even under severe conditions such as dry conditions and high-temperature conditions, and to obtain a hardened cement body having stable adhesion performance (tensile strength). Can do.
本発明において、ポリマーセメント組成物とは、基本的にはセメント、骨材及びポリマーエマルションを混合してなるものである。
本発明で用いるセメントは、水硬化性セメントであれば特に限定されず、例えば普通、早強、超早強、中庸熱、低熱、耐硫酸塩、白色等の各種ポルトランドセメント；高炉スラグ、フライアッシュ、シリカフューム等との混合セメント；アルミナセメント、半水石膏、ドロマイトプラスター等が挙げられ、これらを併用してもよい。
In the present invention, the polymer cement composition is basically a mixture of cement, aggregate and polymer emulsion.
The cement used in the present invention is not particularly limited as long as it is a water-curable cement. For example, various portland cements such as normal, early strength, very early strength, moderate heat, low heat, sulfate resistance, white, etc .; blast furnace slag, fly ash , Mixed cement with silica fume and the like; alumina cement, hemihydrate gypsum, dolomite plaster and the like may be used, and these may be used in combination.
本発明で用いる骨材としては、一般にモルタルやコンクリートに使用されている骨材であれば特に限定されず、例えば珪砂、砕砂、砕石、陸砂、陸砂利、川砂、川砂利、人工骨材、貝殻、スラグ骨材、石粉等が挙げられ、これらを併用してもよい。
ポリマーセメント組成物中の骨材の配合量は、セメント１００重量部に対し、０〜６００質量部が好ましく、特に１０〜５００質量部が好ましい。
The aggregate used in the present invention is not particularly limited as long as it is generally used in mortar and concrete, for example, silica sand, crushed sand, crushed stone, land sand, land gravel, river sand, river gravel, artificial aggregate, Shells, slag aggregates, stone powder and the like may be mentioned, and these may be used in combination.
The amount of aggregate in the polymer cement composition is preferably 0 to 600 parts by weight, particularly preferably 10 to 500 parts by weight, with respect to 100 parts by weight of cement.
本発明で用いるポリマーエマルションは、有機高分子ポリマーが乳化して水系溶媒中に均一に分散した水溶液で、セメントの硬化後乾燥することによりポリマー皮膜を形成し得るものである。ポリマーエマルションは、カチオン性、アニオン性、ノニオン性又は両性のいずれでもよい。
ポリマーエマルションとしては、例えばポリ酢酸ビニル、エチレン−酢酸ビニル共重合体、エチレン−酢酸ビニル−塩化ビニル共重合体、酢酸ビニル−アクリル酸エステル共重合体、変性酢酸ビニル、酢酸ビニル−ベオバ共重合体等の酢酸ビニル系樹脂；ポリアクリル酸エステル、ポリメタクリル酸エステル、アクリル酸エステル−スチレン共重合体等のアクリル系樹脂；ポリエチレン、及びポリプロピレン等のポリオレフィン系樹脂、不飽和ポリエステル系樹脂、ポリウレタン系樹脂、エポキシ系樹脂等の合成樹脂エマルション；天然ゴム、スチレン−ブタジエン共重合体、クロロプレンゴム、アクリロニトリル−ブタジエン共重合体、メチルメタクリレート−ブタジエン共重合体等のゴムラテックスのエマルション；アスファルト、ゴムアスファルト、パラフィン等の瀝青質等のエマルションが挙げられ、これらを併用してもよい。また、粉末状にした再乳化型粉末樹脂を用いてもよい。本発明において、ポリマーは得られるエマルションの性質に応じて選択される。
The polymer emulsion used in the present invention is an aqueous solution in which an organic polymer is emulsified and uniformly dispersed in an aqueous solvent, and can form a polymer film by drying after hardening of the cement. The polymer emulsion may be cationic, anionic, nonionic or amphoteric.
Examples of the polymer emulsion include polyvinyl acetate, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl chloride copolymer, vinyl acetate-acrylic ester copolymer, modified vinyl acetate, vinyl acetate-veova copolymer. Vinyl acetate resins such as: acrylic resins such as polyacrylates, polymethacrylates, acrylate-styrene copolymers; polyolefin resins such as polyethylene and polypropylene, unsaturated polyester resins, polyurethane resins Synthetic resin emulsions such as epoxy resins; emulsions of rubber latex such as natural rubber, styrene-butadiene copolymer, chloroprene rubber, acrylonitrile-butadiene copolymer, methyl methacrylate-butadiene copolymer; asphalt, rubber Asphalt, include emulsion bituminous such as paraffin or the like may be used in combination. Moreover, you may use the re-emulsification type powder resin made into the powder form. In the present invention, the polymer is selected according to the properties of the resulting emulsion.
エマルション中に含まれるポリマー成分のガラス転移温度は特に制限されないが、例えば−７０〜３０℃、好ましくは−５０〜１０℃である。また、エマルション中に含まれるポリマーの固形分は、５〜５０質量％が好ましく、特に５〜４５質量％が好ましい。
ポリマーセメント組成物中のポリマーエマルションの固形分の配合量は、セメント１００質量部に対して、１〜２０質量％が好ましく、特に３〜１５質量％が好ましい。
The glass transition temperature of the polymer component contained in the emulsion is not particularly limited, but is, for example, −70 to 30 ° C., preferably −50 to 10 ° C. Moreover, 5-50 mass% is preferable and, as for the solid content of the polymer contained in an emulsion, 5-45 mass% is especially preferable.
1-20 mass% is preferable with respect to 100 mass parts of cement, and, as for the compounding quantity of the solid content of the polymer emulsion in a polymer cement composition, 3-15 mass% is especially preferable.
ポリマーエマルションは、公知の製造方法により得られるものを用いることができ、例えば、乳化剤の存在下に、重合開始剤を用いて、水又は含水溶媒中で合成樹脂の原料となる重合性モノマーを乳化重合する方法等により製造することができる。乳化剤としては、カチオン性、アニオン性、ノニオン性又は両性の界面活性剤、ポリビニルアルコール等の保護コロイドが挙げられる。 As the polymer emulsion, one obtained by a known production method can be used. For example, in the presence of an emulsifier, a polymerization initiator is used to emulsify a polymerizable monomer that is a raw material for a synthetic resin in water or a hydrous solvent. It can be produced by a polymerization method or the like. Examples of emulsifiers include cationic, anionic, nonionic or amphoteric surfactants and protective colloids such as polyvinyl alcohol.
カチオン性界面活性剤としては、例えば、ドデシルアンモニウムクロライド、ココナットアミンアセテート、ステアリルアミンアセテート等のアルキルアミンの塩；ラウリルトリメチルアンモニウムクロライド、ステアリルトリメチルアンモニウムクロライド、セチルトリメチルアンモニウムクロライド等の第４級アンモニウム塩等が挙げられる。 Examples of the cationic surfactant include salts of alkylamines such as dodecyl ammonium chloride, coconut amine acetate and stearyl amine acetate; quaternary ammonium salts such as lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride and cetyl trimethyl ammonium chloride. Etc.
アニオン性界面活性剤としては、例えば、ラウリル硫酸ナトリウム、ラウリル硫酸アンモニウム等のアルキル硫酸エステル塩類；ドデシルベンゼンスルホン酸ナトリウム、ドデシルベンゼンスルホン酸アンモニウム、ドデシルナフタレンスルホン酸ナトリウム等のアルキルアリールスルホン酸塩類；ポリオキシエチレンアルキルスルホン酸塩、ポリオキシエチレンアルキルアリールスルホン酸塩、ジアルキルスルホコハク酸塩、アリールスルホン酸ホルマリン縮合物、ドデシル酸アンモニウム、ステアリン酸ナトリウム、オレイン酸カリウム、ヒマシ油カリ石ケン等の脂肪酸塩等が挙げられる。 Examples of the anionic surfactant include alkyl sulfates such as sodium lauryl sulfate and ammonium lauryl sulfate; alkylaryl sulfonates such as sodium dodecylbenzenesulfonate, ammonium dodecylbenzenesulfonate, and sodium dodecylnaphthalenesulfonate; polyoxy Fatty acid salts such as ethylene alkyl sulfonate, polyoxyethylene alkyl aryl sulfonate, dialkyl sulfosuccinate, aryl sulfonic acid formalin condensate, ammonium dodecylate, sodium stearate, potassium oleate, castor oil potassium soap, etc. Can be mentioned.
ノニオン性界面活性剤としては、例えば、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルアリールエーテル、ポリエチレングリコールとポリプロピレングリコールの縮合物、ソルビタン脂肪酸エステル、ポリオキシエチレンソルビタン脂肪酸エステル、脂肪酸モノグリセライド、ポリアミド、エチレンオキサイドと脂肪族アミンの縮合生成物等が挙げられる。 Nonionic surfactants include, for example, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, condensate of polyethylene glycol and polypropylene glycol, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, fatty acid monoglyceride, polyamide, and ethylene oxide. And condensation products of aliphatic amines.
両性界面活性剤としては、例えば、ラウリルベタイン、ステアリルベタイン、ラウリルジメチルアミンオキサイド等のアルキルベタイン、アルキルアミンオキサイド型乳化剤等が挙げられる。 Examples of amphoteric surfactants include alkylbetaines such as lauryl betaine, stearyl betaine, lauryl dimethylamine oxide, and alkylamine oxide type emulsifiers.
ポリビニルアルコールとしては、完全けん化ポリビニルアルコール、部分けん化ポリビニルアルコール、ポリビニルアルコールの一部をカルボキシル基、スルフォニル基等で修飾したアニオン化ポリビニルアルコール等が挙げられる。乳化力の点から、けん化率は８５〜１００％、平均重合度は３００〜４０００が好ましい。 Examples of polyvinyl alcohol include fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol, and anionized polyvinyl alcohol obtained by modifying a part of polyvinyl alcohol with a carboxyl group, a sulfonyl group, or the like. From the viewpoint of emulsifying power, the saponification rate is preferably 85 to 100%, and the average degree of polymerization is preferably 300 to 4000.
重合開始剤としては、水又は含水溶媒中でラジカル重合できるものが好ましく、過酸化水素、過酢酸、過硫酸又はこれらのアンモニウム塩や硫酸塩等の水溶性の過酸化物やその塩等を挙げることができる。また、ベンゾイルパーオキサイド、ｔ−ブチルハイドロパーオキサイド、２，２'−アゾビスイソブチルニトリル等の有機過酸化物、メタ亜硫酸ナトリウムやピロ亜硫酸ナトリウム等の還元剤を併用することができる。
重合開始剤の使用量は、エマルションが製造できる範囲であれば適宜選択できる。
As the polymerization initiator, those capable of radical polymerization in water or a hydrous solvent are preferable, and examples thereof include hydrogen peroxide, peracetic acid, persulfuric acid, water-soluble peroxides such as ammonium salts and sulfates thereof, and salts thereof. be able to. Further, organic peroxides such as benzoyl peroxide, t-butyl hydroperoxide, 2,2′-azobisisobutylnitrile, and reducing agents such as sodium metasulfite and sodium pyrosulfite can be used in combination.
The amount of the polymerization initiator used can be appropriately selected as long as the emulsion can be produced.
ポリマーセメント組成物には、セメント、骨材及びポリマーエマルションの他に、例えば消泡剤、収縮低減剤、膨張材、各種スラグ、各種ポゾラン、増粘剤、繊維、粘土鉱物、減水剤、流動化剤、硬化遅延剤、硬化促進剤等を混合してもよい。 In addition to cement, aggregate and polymer emulsion, polymer cement compositions include, for example, antifoaming agents, shrinkage reducing agents, expanding materials, various slags, various pozzolans, thickeners, fibers, clay minerals, water reducing agents, fluidization An agent, a curing retarder, a curing accelerator and the like may be mixed.
ポリマーセメント組成物をコンクリート躯体に施工する方法としては、例えば鏝塗り等の塗布や、吹き付け等の散布、流し込み、注入等の通常の方法が挙げられる。ポリマーセメント組成物を乾燥、硬化させた後、更に同じ操作を繰り返し複数の硬化層を形成させてもよい。
ポリマーセメント組成物をコンクリート躯体に施工する際、組成物を直接コンクリート躯体に積層させてもよいが、より接着強度を高める点から予めコンクリート躯体の表面に吸水防止プライマーを塗布してから施工するのが好ましい。吸収防止プライマーとしては、公知のエチレン−酢酸ビニル共重合体系エマルション、アクリル系樹脂エマルション等を用いることができる。
Examples of the method for applying the polymer cement composition to the concrete frame include normal methods such as coating such as plastering, spraying and spraying, pouring, and pouring. After the polymer cement composition is dried and cured, the same operation may be repeated to form a plurality of cured layers.
When applying the polymer cement composition to the concrete frame, the composition may be directly laminated to the concrete frame, but from the point of increasing the adhesive strength, apply the water absorption prevention primer on the surface of the concrete frame beforehand. Is preferred. As the absorption-preventing primer, a known ethylene-vinyl acetate copolymer emulsion, acrylic resin emulsion, or the like can be used.
本発明においては、ポリマーセメント組成物を施工した後、組成物が硬化する前に、組成物の施工表面にポリマーエマルションからなる塗膜養生材を塗布するが、ここで塗布する塗膜養生材は、ポリマーセメント組成物と逆性の塗膜養生材であることが必要である。すなわち、ポリマーセメント組成物がカチオン性である場合、塗膜養成材はアニオン性及び／又はノニオン性であることが必要であり、他方ポリマーセメント組成物がアニオン性及び／又はノニオン性である場合、塗膜養成材はカチオン性であることが必要である。
ポリマーセメント組成物及び塗膜養生材がカチオン性であるとは、該組成物又は塗膜養生材に含まれるポリマーエマルションがそのポリマー又は乳化剤の分子内に３級アミノ基、第４級アンモニウム塩基等のカチオン性基を有していることをいう。また、ポリマーセメント組成物及び塗膜養生材がアニオン性であるとは、該組成物又は塗膜養生材に含まれるポリマーエマルションがそのポリマー又は乳化剤の分子内にカルボキシル基、スルホ基、リン酸基又はそれらの塩等のアニオン性基を有していることをいい、ポリマーセメント組成物及び塗膜養生材がノニオン性であるとは、該組成物又は塗膜養生材に含まれるポリマーエマルションがそのポリマー又は乳化剤の分子内にイオン性基を有していないことをいう。ポリマーエマルションが有するカチオン性基、アニオン性基は、モノマー由来でもよく、界面活性剤（乳化剤）由来でもよい。
ポリマーエマルションの性質は、使用するモノマーの種類や界面活性剤の種類、それらの使用量により決めることができる。
In the present invention, after the polymer cement composition is applied, before the composition is cured, a coating curing material made of a polymer emulsion is applied to the surface of the composition, but the coating curing material applied here is It is necessary to be a coating curing material that is opposite to the polymer cement composition. That is, when the polymer cement composition is cationic, the coating material needs to be anionic and / or nonionic, while when the polymer cement composition is anionic and / or nonionic, The coating film training material needs to be cationic.
The polymer cement composition and the coating film curing material are cationic. The polymer emulsion contained in the composition or the coating film curing material is a tertiary amino group, a quaternary ammonium base or the like in the molecule of the polymer or emulsifier. Having a cationic group. In addition, the polymer cement composition and the film curing material are anionic means that the polymer emulsion contained in the composition or the film curing material is a carboxyl group, a sulfo group, or a phosphate group in the molecule of the polymer or emulsifier. Or having an anionic group such as a salt thereof, and that the polymer cement composition and the coating curing material are nonionic means that the polymer emulsion contained in the composition or the coating curing material is It means that there is no ionic group in the polymer or emulsifier molecule. The cationic group and the anionic group of the polymer emulsion may be derived from a monomer or a surfactant (emulsifier).
The properties of the polymer emulsion can be determined by the type of monomer used, the type of surfactant, and the amount used.
本発明において、塗膜養生材に用いるポリマーエマルションとしては、前記と同様のものを挙げることができる。エマルション中に含まれるポリマーの固形分は、塗膜養生の効果、ポリマーセメント組成物の強度発現、塗布の作業性の点から５〜５０質量％、好ましくは５〜４０質量％である。また、エマルションの保存濃度は、保存安定性の点から、ポリマー固形分として１０〜６０重量％が好ましく、特に２０〜５５質量％が好ましい。 In the present invention, examples of the polymer emulsion used for the coating film curing material include the same as described above. The solid content of the polymer contained in the emulsion is 5 to 50% by mass, preferably 5 to 40% by mass, from the viewpoint of the effect of coating curing, the development of the strength of the polymer cement composition, and the workability of coating. Further, the storage concentration of the emulsion is preferably 10 to 60% by weight, particularly preferably 20 to 55% by weight as the solid content of the polymer from the viewpoint of storage stability.
エマルション中には、例えば消泡剤、各種界面活性剤、硬化促進剤、有機繊維、増粘剤、パラフィン等のワックス成分、脂肪酸石鹸等を混合してもよい。 In the emulsion, for example, antifoaming agents, various surfactants, curing accelerators, organic fibers, thickeners, wax components such as paraffin, fatty acid soaps, and the like may be mixed.
ポリマーエマルションを塗布する方法としては、例えば刷毛塗り、ローラー塗り等の塗布手段や、噴霧、吹き付け等の散布等、通常の方法が挙げられる。また、ポリマーエマルションを塗布後、その塗布表面を鏝押えにより均すことで、塗膜の強度向上を図ることができる。塗膜養生材をかけながら鏝押さえをすることにより、水分の気散への抵抗性の他、鏝が滑り、表面にセメントペーストが浮き出て、きれいに表面を仕上げることができる。 Examples of the method for applying the polymer emulsion include usual methods such as application means such as brushing and roller coating, and spraying and spraying. Moreover, after apply | coating a polymer emulsion, the intensity | strength improvement of a coating film can be aimed at by equalizing the application | coating surface with a heel presser. By holding the wrinkle while applying the coating curing material, it is possible to finish the surface neatly, as well as resistance to moisture dispersal, the wrinkle slips and the cement paste rises on the surface.
ポリマーエマルションの塗布は、ポリマーセメント組成物の施工後、セメントが硬化する前に行うが、ある程度のシマリを生じた後より硬化１日後の間に行うことが好ましく、具体的には施工後３０分〜２日の間が好ましい。
ポリマーエマルションの塗布量は、固形分換算で５〜５０ｇ／ｍ2が好ましく、特に１０〜４５ｇ／ｍ2が好ましい。塗布量が少なすぎると十分な効果が得られず、他方塗布量が多すぎると複数のセメント硬化層を形成させる場合、上に施工するポリマーセメント組成物の剥離を生じ易い。
The application of the polymer emulsion is performed after the application of the polymer cement composition and before the cement is hardened, but it is preferably carried out within 1 day after the hardening after a certain degree of scumming has occurred, specifically 30 minutes after the application. Between ˜2 days is preferred.
The coating amount of the polymer emulsion is preferably 5 to 50 g / m 2 , particularly 10 to 45 g / m 2 in terms of solid content. When the coating amount is too small, a sufficient effect cannot be obtained. On the other hand, when the coating amount is too large, peeling of the polymer cement composition to be applied tends to occur when a plurality of hardened cement layers are formed.
このように、ポリマーセメント組成物の施工表面にポリマーエマルションを塗布し、乾燥・硬化させることによりセメント硬化体が得られる。該セメント硬化体は、強風条件下や高温乾燥条件下等の厳しい環境下においてもドライアウトが生じず、付着強度に優れることから、これをコンクリート躯体に積層することにより、ひび割れのない良好な外観を有するコンクリート躯体を得ることができる。セメント硬化体を積層させるコンクリート躯体は、特に限定されず、土木用、建築用等いずれのモルタル・コンクリート構造物でよい。 Thus, a hardened cement body is obtained by applying the polymer emulsion to the construction surface of the polymer cement composition, and drying and curing. The hardened cement body does not cause dryout even under severe conditions such as strong wind conditions and high temperature drying conditions, and has excellent adhesion strength. By laminating this on a concrete frame, it has a good appearance without cracks. It is possible to obtain a concrete frame having The concrete frame in which the hardened cement body is laminated is not particularly limited, and may be any mortar / concrete structure such as civil engineering or architectural use.
以下、本発明について実施例をあげて具体的に説明するが、本発明はこれらによって何等限定されるものではない。 EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited at all by these.
＜使用材料＞
ポリマーエマルション：ガンツ化成社 ウルトラゾール CMX-235（カチオン性、オールアクリル）、ニチゴー・モビニール社 モビニール7700（アニオン性、保護コロイドオールアクリル）、ニチゴー・モビニール社 モビニール7800（カチオン性、保護コロイドオールアクリル）、旭化成ケミカルズ社 A1500（アニオン性、スチレンアクリル）、太平洋マテリアル社 CX-B（アニオン性、SBR）
粉末樹脂：日本ＮＳＣ社 TITAN 8100（カチオン性、オールアクリル）、ワッカー社 LL512（アニオン性、スチレンアクリル）、ニチゴー・モビニール社 DM-2072P（アニオン性、酢酸ビニル・ベオバ・アクリル）、ニチゴー・モビニール社 LDM-7000P（ノニオン性、オールアクリル）
セメント：太平洋セメント社普通ポルトランドセメント
珪砂： 三河産珪砂FM 1.7
<Materials used>
Polymer Emulsion: Gantz Kasei Ultrasol CMX-235 (cationic, all acrylic), Nichigo Mobile Co., Ltd. Mobile 7700 (anionic, protective colloid all acrylic), Nichigo Mobile Co., Ltd. Mobile 7800 (cationic, protective colloid all acrylic) , Asahi Kasei Chemicals A1500 (anionic, styrene acrylic), Pacific Materials CX-B (anionic, SBR)
Powder resin: Nippon NSC TITAN 8100 (cationic, all acrylic), Wacker LL512 (anionic, styrene acrylic), Nichigo Mobile, Inc. DM-2072P (anionic, vinyl acetate, veova, acrylic), Nichigo Mobile, Ltd. LDM-7000P (nonionic, all acrylic)
Cement: Taiheiyo Cement Normal Portland cement quartz sand: Mikawa quartz sand FM 1.7
＜乾燥条件下施工における付着試験＞
コンクリート歩道板（300×300×60 mm）上に吸収防止プライマーを塗布した後、強風条件下及び高温乾燥条件下で表１に示す各種ポリマーセメントモルタルを塗付けした。
塗付け1.5時間後、表１に示す各種塗膜養生材を塗布した。その際、実施例３及び７〜９と比較例２及び５では鏝押さえを行った。24時間後まで同条件にて養生を行い、20℃相対湿度60％に移動し、試験材齢まで養生を行った。
試験前に剥落防止工施工面に40×40 mmの正方形に、コンクリート歩道板表面に達するまでダイヤモンドカッターにて切込みを入れ、同サイズの鋼製アタッチメントをエポキシ接着材にて貼付け、硬化後、建研式接着力試験器で施工面に対し垂直方向に引張り、付着強度を測定した。付着強度1.8N/mm2以上を合格とした。また、「ひび割れ」の有無を目視により判定した。結果を表１及び表２に示す。
強風条件：気温15〜6℃（平均10℃）、相対湿度30〜50％（平均38％）、
平均風速8m、最大風速19m（屋外）
高温乾燥条件：温度35℃、相対湿度40％（恒温槽内）
<Adhesion test in construction under dry conditions>
After applying an absorption preventing primer on a concrete sidewalk board (300 × 300 × 60 mm), various polymer cement mortars shown in Table 1 were applied under strong wind conditions and high temperature drying conditions.
After 1.5 hours of application, various coating curing materials shown in Table 1 were applied. At that time, in Examples 3 and 7 to 9 and Comparative Examples 2 and 5, wrinkle pressing was performed. Curing was performed under the same conditions until 24 hours later, and the temperature was transferred to 20 ° C. and 60% relative humidity, and curing was performed until the test material age.
Before the test, make a 40 x 40 mm square on the construction surface to prevent peeling, and cut with a diamond cutter until the surface of the concrete sidewalk board is reached. Adhere the steel attachment of the same size with an epoxy adhesive, cure, and then build The adhesion strength was measured by pulling in a direction perpendicular to the construction surface with a sharp adhesion tester. An adhesion strength of 1.8 N / mm 2 or higher was accepted. In addition, the presence or absence of “cracks” was visually determined. The results are shown in Tables 1 and 2.
Strong wind conditions: Temperature 15-6 ° C (average 10 ° C), relative humidity 30-50% (average 38%),
Average wind speed 8m, maximum wind speed 19m (outdoor)
High temperature drying conditions: temperature 35 ° C, relative humidity 40% (in a constant temperature bath)
表１及び２の結果から、ポリマーセメント組成物の施工表面に、該組成物で用いたエマルションと逆性のイオン性基を有するエマルションを塗布すれば、強風条件下及び高温乾燥条件下のいずれにおいてもひび割れが生ずることなく、付着強度も1.8N/mm2以上と優れたセメント硬化体が得られることが確認できた。 From the results in Tables 1 and 2, if an emulsion having an ionic group opposite to the emulsion used in the composition is applied to the construction surface of the polymer cement composition, it can be used under either strong wind conditions or high temperature drying conditions. It was confirmed that an excellent hardened cement body with an adhesion strength of 1.8 N / mm 2 or more could be obtained without cracking.
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| JPS62223081A (en) * | 1986-03-24 | 1987-10-01 | 住友セメント株式会社 | Surface degradation prevention for cementitious set body |
| JPS634883A (en) * | 1986-06-25 | 1988-01-09 | Kanebo N S C Kk | Method for applying finishing material layer to concrete structure |
| JPH01298086A (en) * | 1988-05-25 | 1989-12-01 | Matsushita Electric Works Ltd | Production of decorative fiber cement sheet |
| JP2000016886A (en) * | 1998-06-30 | 2000-01-18 | Toagosei Co Ltd | Technique for protecting concrete structure |
| JP2000017742A (en) * | 1998-06-30 | 2000-01-18 | Toagosei Co Ltd | Protecting construction method for concrete structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62223081A (en) * | 1986-03-24 | 1987-10-01 | 住友セメント株式会社 | Surface degradation prevention for cementitious set body |
| JPS634883A (en) * | 1986-06-25 | 1988-01-09 | Kanebo N S C Kk | Method for applying finishing material layer to concrete structure |
| JPH01298086A (en) * | 1988-05-25 | 1989-12-01 | Matsushita Electric Works Ltd | Production of decorative fiber cement sheet |
| JP2000016886A (en) * | 1998-06-30 | 2000-01-18 | Toagosei Co Ltd | Technique for protecting concrete structure |
| JP2000017742A (en) * | 1998-06-30 | 2000-01-18 | Toagosei Co Ltd | Protecting construction method for concrete structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017115407A (en) * | 2015-12-24 | 2017-06-29 | 太平洋マテリアル株式会社 | Construction method for polymer cement mortar |
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