JP2005082416A - Polymer cement composition, polymer cement grout mortar and repairing material using the same - Google Patents
Polymer cement composition, polymer cement grout mortar and repairing material using the same Download PDFInfo
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- JP2005082416A JP2005082416A JP2003313487A JP2003313487A JP2005082416A JP 2005082416 A JP2005082416 A JP 2005082416A JP 2003313487 A JP2003313487 A JP 2003313487A JP 2003313487 A JP2003313487 A JP 2003313487A JP 2005082416 A JP2005082416 A JP 2005082416A
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- 239000000463 material Substances 0.000 title claims abstract description 60
- 239000011414 polymer cement Substances 0.000 title claims abstract description 46
- 239000000203 mixture Substances 0.000 title claims abstract description 39
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 25
- 239000011440 grout Substances 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 239000011398 Portland cement Substances 0.000 claims abstract description 16
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 15
- 239000002657 fibrous material Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 230000008439 repair process Effects 0.000 claims description 22
- 239000012615 aggregate Substances 0.000 claims description 2
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- 239000000835 fiber Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 229920002554 vinyl polymer Polymers 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 239000011433 polymer cement mortar Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000013065 commercial product Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
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- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004815 dispersion polymer Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- FEIQOMCWGDNMHM-UHFFFAOYSA-N 5-phenylpenta-2,4-dienoic acid Chemical compound OC(=O)C=CC=CC1=CC=CC=C1 FEIQOMCWGDNMHM-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000008055 alkyl aryl sulfonates Chemical class 0.000 description 1
- 150000001414 amino alcohols Chemical class 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 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
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、補修部位に充填する用途に好適な、硬化収縮が少ない耐久性の良好な補修用のポリマーセメント組成物、それを含有してなる補修材料、ポリマーセメントグラウトモルタル、及びそれを含有してなる補修材に関する。 The present invention relates to a polymer cement composition for repair with good durability and low cure shrinkage, suitable for use in filling a repair site, a repair material containing the composition, a polymer cement grout mortar, and a composition containing the same. This is related to repair materials.
従来より、コンクリート断面修復材として、速硬セメント、繊維長３〜20mmの短繊維、及び再乳化粉末樹脂を含有するコンクリート断面修復材が知られている(特許文献１参照)。 Conventionally, as a concrete cross-section restoration material, a concrete cross-section restoration material containing fast-hardening cement, short fibers having a fiber length of 3 to 20 mm, and a re-emulsified powder resin is known (see Patent Document 1).
また、コンクリート断面修復材として、水の未添加状態で、セメントに、粉末度5,000cm2/g以上の分級フライアッシュ、繊維長３〜20mmの短繊維や再乳化型粉末樹脂が混合されたコンクリート断面修復材が開示されている(特許文献２参照)。
さらに、セメントと、ポリアクリル酸エステル樹脂系、スチレンブタジエン合成ゴム系、又は酢酸ビニルベオバアクリル共重合系のうち少なくとも一種のポリマーと、界面活性作用を有する有機系の収縮低減剤とを含有してなるポリマーセメント組成物が提案されている(特許文献３参照)。
Further, it contains a cement, at least one polymer of a polyacrylic ester resin system, a styrene butadiene synthetic rubber system, or a vinyl acetate berba acrylic copolymer system, and an organic shrinkage reducing agent having a surface-active action. A polymer cement composition is proposed (see Patent Document 3).
しかし、特許文献１に記載されている技術は、プレミックスタイプで粉体と水のみを計量すれば良く、短期強度が高いという長所を有するものの、長さ変化が大きくひび割れ評価も７日程度の短期間での評価であり、長期間の耐久性は不明である。
また、特許文献２に記載されている技術は、プレミックスタイプで粉体と水のみを計量すれば良いという長所を有するものの、ひび割れ評価が７日程度の短期間での評価であり、長期間の耐久性は不明である。
さらに、特許文献３に記載されている技術は、プレミックスタイプで粉体と水のみを計量すれば良いという長所を有するものの、ひび割れ評価が５、20、及び30℃での短期間促進での評価で、長期間の耐久性は不明であり、かつ、対象用途が岩のひび割れ注入に特定されており、補修用グラウト材として要求されるフレッシュ時の良好な流動性（グラウチング性）、無収縮性、及びノンブリーディングなどの特性が不明であった。
However, although the technique described in Patent Document 1 is a premix type, it is only necessary to measure powder and water, and although it has the advantage of high short-term strength, the length change is large and the crack evaluation is about 7 days. This is a short-term evaluation, and long-term durability is unknown.
Moreover, although the technique described in Patent Document 2 has the advantage that only powder and water need to be weighed in a premix type, the crack evaluation is an evaluation in a short period of about 7 days, and a long period of time. The durability of is unknown.
Furthermore, although the technique described in Patent Document 3 has the advantage that only powder and water need to be measured in a premix type, the crack evaluation is accelerated for a short period of time at 5, 20 and 30 ° C. The long-term durability is unknown in the evaluation, and the target application is specified for rock crack injection. Good fresh fluidity (grouting) required for repair grouting, no shrinkage Characteristics such as sex and non-bleeding were unknown.
本発明者は、鋭意検討を重ねた結果、特定の配合組成や物質を組み合わせることで、優れた流動性を備え、硬化収縮量が少なく、付着性、耐久性、及び施工性に優れるため、各種グラウチング・補修工事、中でもコンクリートの断面修復補修用途に好適に使用できるポリマーセメントモルタル組成物およびポリマーセメントグラウトモルタルが得られることを見出し本発明を完成するに至った。
本発明はかかるポリマーセメントモルタル組成物やポリマーセメントグラウトモルタルを提供することを目的とするものである。
As a result of intensive studies, the inventor has a combination of specific blending compositions and substances, so that it has excellent fluidity, has a small amount of cure shrinkage, and is excellent in adhesion, durability, and workability. The inventors have found that a polymer cement mortar composition and a polymer cement grout mortar that can be suitably used for grouting / repair work, particularly for repairing a cross section of concrete, and have completed the present invention.
The object of the present invention is to provide such a polymer cement mortar composition and polymer cement grout mortar.
本発明は、ポルトランドセメント、膨張材、再乳化型粉末樹脂、骨材、長さ３〜30mmの繊維物質、収縮低減剤、減水剤、及び消泡剤を含有してなり、骨材が、ポルトランドセメントと膨張材の合計100部に対して、150〜300部であるポリマーセメント組成物であり、該ポリマーセメント組成物と、該ポリマーセメント組成物中のポルトランドセメントと膨張材の合計100部に対して、30〜50部の水とを混合してなるポリマーセメントグラウトモルタルであり、該ポリマーセメント組成物を含有する補修材料であり、該ポリマーセメントグラウトモルタルを含有する補修材である。 The present invention comprises Portland cement, an expansion material, a re-emulsifying powder resin, an aggregate, a fiber material having a length of 3 to 30 mm, a shrinkage reducing agent, a water reducing agent, and an antifoaming agent. The polymer cement composition is 150 to 300 parts with respect to a total of 100 parts of the coolant and the expansion material, and the polymer cement composition and the total of 100 parts of the Portland cement and the expansion material in the polymer cement composition A polymer cement grout mortar obtained by mixing 30 to 50 parts of water, a repair material containing the polymer cement composition, and a repair material containing the polymer cement grout mortar.
以下、本発明を更に詳細に説明する。
なお、本明細書における補修とは、コンクリートの断面修復補修、道路、歩道、アスファルト舗装部、及びコンクリート舗装部等の各種補修を総称する。
また、本発明における「部」は、特に規定のない限り質量基準である。
Hereinafter, the present invention will be described in more detail.
In addition, the repair in this specification is a general term for various repairs such as concrete cross-section repair repair, road, sidewalk, asphalt pavement, and concrete pavement.
Further, “part” in the present invention is based on mass unless otherwise specified.
本発明では、ポルトランドセメント、膨張材、再乳化型粉末樹脂、骨材、長さ３〜30mmの繊維物質、収縮低減剤、減水剤、消泡剤、及び水を混合してポリマーセメントグラウトモルタルを製造する。 In the present invention, Portland cement, an expansion material, a re-emulsifying powder resin, an aggregate, a fiber material having a length of 3 to 30 mm, a shrinkage reducing agent, a water reducing agent, an antifoaming agent, and water are mixed to form a polymer cement grout mortar. To manufacture.
本発明で使用するポルトランドセメントとしては、通常市販されている、普通、早強、中庸熱、及び超早強等のポルトランドセメント、これらポルトランドセメントに、フライアッシュや高炉スラグなどを混合した各種混合セメント、さらに、これらの各種混合セメントを微粉砕したものも使用可能である。 Portland cement used in the present invention is usually commercially available, such as normal, early strong, moderately hot, and ultra-early strong Portland cement, and various mixed cements in which fly ash, blast furnace slag, etc. are mixed with these Portland cements. Furthermore, those obtained by finely pulverizing these various mixed cements can also be used.
本発明で使用する膨張材としては、一般に用いられているカルシウムサルホアルミネート系膨張材や生石灰系膨張材が使用可能である。
膨張材の使用量は、ポルトランドセメント(以下、単にセメントという)100部に対して、１〜20部が好ましく、２〜15部がより好ましい。１部未満では自己収縮を充分に抑えることができない場合があり、20部を超えると過剰膨張が発生する場合がある。
As the expansion material used in the present invention, generally used calcium sulfoaluminate-based expansion materials and quicklime-based expansion materials can be used.
The amount of the expansion material used is preferably 1 to 20 parts, more preferably 2 to 15 parts, with respect to 100 parts of Portland cement (hereinafter simply referred to as cement). If it is less than 1 part, self-shrinkage may not be sufficiently suppressed, and if it exceeds 20 parts, excessive expansion may occur.
本発明で使用する再乳化型粉末樹脂(以下、粉末樹脂という)としては、ポリアクリル酸エステル、酢酸ビニル、エチレン−酢酸ビニル、酢酸ビニル−バーサチック酸ビニル、スチレン−アクリル酸エステル、又はアクリル酸エステル−酢酸ビニル−バーサチック酸ビニルなどを主成分とする粉末状の樹脂を使用することが可能であり、そのうち、耐久性の面からはアクリル酸エステル−酢酸ビニル−バーサチック酸ビニルを主成分とするものがより好ましい。
その再乳化粉末樹脂の製法は、粉末化方法やブロッキング防止法等の製法に限定されず、いずれの製造方法のものも使用可能である。
Examples of the re-emulsifying powder resin used in the present invention (hereinafter referred to as powder resin) include polyacrylic acid ester, vinyl acetate, ethylene-vinyl acetate, vinyl acetate-vinyl versatic acid, styrene-acrylic acid ester, or acrylic acid ester. -It is possible to use a powdered resin whose main component is vinyl acetate-vinyl versatate, etc., of which, in terms of durability, acrylic acid ester-vinyl acetate-vinyl versatate Is more preferable.
The production method of the re-emulsified powder resin is not limited to a production method such as a pulverization method or an anti-blocking method, and any production method can be used.
従来の技術では、ポリマーを溶剤で稀釈したポリマーディスパージョンとセメントモルタルプレミックス品と水を計量し、練り混ぜる手法が主流であった。
本発明において、粉末樹脂は、ポリマーディスパージョンに比べて水分含有量が極めて少ないため、セメントに混合しておいても水を加えない限り硬化し難いことからあらかじめプレミックスしておくことができ、施工現場でのポリマーの計量、混合という煩雑な作業を省略でき、施工作業性が向上する。
また、粉末樹脂がセメントと共に結合材的な役割を果たし、均一に分散して作用するため、計量後添加する場合に比べ、補修を要するコンクリートに対する付着強度の面でも有利に作用する。
粉末樹脂の使用量は、セメントと膨張材の合計100部に対して、３〜20部が好ましい。３部未満では耐久性や付着性能が不充分な場合があり、20部を超えるとコストアップになると共にフレッシュ時の流動性が確保できない場合がある。
In the prior art, a method in which a polymer dispersion obtained by diluting a polymer with a solvent, a cement mortar premixed product, and water are weighed and mixed.
In the present invention, since the powder resin has a very low water content compared to the polymer dispersion, it can be premixed in advance because it is difficult to cure unless water is added even if mixed with cement. The troublesome work of polymer weighing and mixing at the construction site can be omitted, and the workability of construction is improved.
In addition, since the powder resin plays a role as a binder together with cement and acts in a uniformly dispersed manner, it acts advantageously in terms of adhesion strength to concrete requiring repair as compared with the case where it is added after measurement.
The amount of the powder resin used is preferably 3 to 20 parts with respect to 100 parts in total of the cement and the expansion material. If it is less than 3 parts, durability and adhesion performance may be insufficient, and if it exceeds 20 parts, the cost may increase and fluidity during freshness may not be ensured.
本発明で使用する骨材は、セメント混練物の流動性を改善するために、また、セメント硬化体の耐久性を改善するために使用するもので、川砂、海砂、及び珪砂等が使用可能である。
さらに、所望の特性のセメント硬化体を得るためにはその粒度構成や配合量にも好適な範囲があり、骨材の粒度としては、粒度は４mm以下のものが好ましく、さらに、1.2mm未満のものが50〜75％で、1.2〜４mmのものが50〜25％である混合物が好ましく、特に、1.2〜４mmのものの割合が45〜25％である混合物がより好ましい。最大粒度が４mmを超えると流動性や充填性が低下し、1.2〜４mmのものの割合が25％未満では耐久性に劣り、50％を超えると必要な早期強度が得られない場合がある。
骨材の使用量は、セメントと膨張材の合計100部に対して、150〜300部が好ましく、150〜250部がより好ましい。150部未満ではひび割れが発生しやすくなる場合があり、300部を超えると充分な流動性の確保が難しくなる場合がある。
The aggregate used in the present invention is used for improving the fluidity of the cement kneaded material and for improving the durability of the hardened cement, and river sand, sea sand, quartz sand, etc. can be used. It is.
Furthermore, in order to obtain a hardened cement body having desired characteristics, there are suitable ranges for the particle size constitution and blending amount, and the particle size of the aggregate is preferably 4 mm or less, and further less than 1.2 mm. The mixture is preferably 50 to 75% and 1.2 to 4 mm is 50 to 25%, and more preferably the mixture of 1.2 to 4 mm is 45 to 25%. If the maximum particle size exceeds 4 mm, the fluidity and filling properties decrease, and if the ratio of 1.2 to 4 mm is less than 25%, the durability is poor, and if it exceeds 50%, the required early strength may not be obtained.
The amount of aggregate used is preferably 150 to 300 parts, more preferably 150 to 250 parts, with respect to a total of 100 parts of cement and expansion material. If it is less than 150 parts, cracks are likely to occur, and if it exceeds 300 parts, it may be difficult to ensure sufficient fluidity.
本発明で使用する繊維物質としては、耐アルカリガラス繊維、炭素繊維、アラミド繊維、ビニロン繊維、ポリプロピレン繊維、ポリエチレン繊維、及びアクリル繊維等が挙げられる。
繊維物質としては、収束繊維や無収束繊維があるが、いずれも使用可能である。
繊維物質の繊維長は、３〜30mmである。繊維長が３mm未満ではひび割れ発生防止効果が充分でない場合があり、30mmを超えると混練性や施工性が低下する場合がある。
繊維物質の使用量は、セメントと膨張材の合計100部に対して、0.2〜10部が好ましく、0.3〜５部がより好ましい。0.2部未満ではひび割れ発生防止効果が充分でない場合があり、10部を超えると混練性や施工性が低下する場合がある。
Examples of the fiber material used in the present invention include alkali-resistant glass fiber, carbon fiber, aramid fiber, vinylon fiber, polypropylene fiber, polyethylene fiber, and acrylic fiber.
Examples of the fiber material include convergent fibers and non-converged fibers, and any of them can be used.
The fiber length of the fiber material is 3 to 30 mm. If the fiber length is less than 3 mm, the effect of preventing cracking may not be sufficient, and if it exceeds 30 mm, the kneadability and workability may be reduced.
The amount of the fiber material used is preferably 0.2 to 10 parts, more preferably 0.3 to 5 parts, with respect to 100 parts in total of cement and expansion material. If it is less than 0.2 part, the cracking prevention effect may not be sufficient, and if it exceeds 10 parts, kneadability and workability may be deteriorated.
本発明で使用する収縮低減剤は、使用することにより未反応の水分の逸散を防止しセメント水和物の乾燥収縮を抑制するもので、具体的には、アルコール系、低級アルコールアルキレンオキシド誘導体系、グリコール系、グリコールエーテル・アミノアルコール誘導体系、及びポリエーテル系等の界面活性作用を有する有機系化合物を使用することができる。
収縮低減剤の使用量は、セメントと膨張材の合計100部に対して、0.3〜７部が好ましい。0.3部未満では収縮低減効果が充分でない場合があり、７部を超えるとコストアップになり、フレッシュ時の流動性が低下する場合がある。
The shrinkage reducing agent used in the present invention prevents the unreacted moisture from being lost and suppresses the drying shrinkage of the cement hydrate. Specifically, the shrinkage reducing agent is an alcohol-based, lower alcohol alkylene oxide derivative. Organic compounds having surface activity such as system, glycol, glycol ether / amino alcohol derivative, and polyether can be used.
As for the usage-amount of a shrinkage reducing agent, 0.3-7 parts are preferable with respect to a total of 100 parts of cement and an expansion material. If it is less than 0.3 part, the shrinkage reduction effect may not be sufficient, and if it exceeds 7 parts, the cost increases, and the fluidity during freshness may decrease.
本発明では、グラウトモルタルとしての流動性を確保し単位水量を減少させるため、ポリマーセメントモルタル組成物に減水剤を混合させる。減水剤は粉体、液体いずれの形態のものも使用可能である。
減水剤としては、ポリオール誘導体、リグニンスルホン酸塩やその誘導体、及び高性能減水剤等が挙げられ、これらの一種又は二種以上が使用可能である。これらの中では、流動性や減水効果の面から、高性能減水剤が好ましい。
In the present invention, a water reducing agent is mixed into the polymer cement mortar composition in order to ensure fluidity as a grout mortar and reduce the unit water amount. The water reducing agent can be used in either powder or liquid form.
Examples of water reducing agents include polyol derivatives, lignin sulfonates and derivatives thereof, and high performance water reducing agents, and one or more of these can be used. Among these, a high performance water reducing agent is preferable from the viewpoint of fluidity and water reducing effect.
高性能減水剤としては、ナフタレンスルホン酸塩、メラミンスルホン酸塩、及びアルキルアリールスルホン酸塩のホルマリン縮合物、並びに、ポリカルボン酸系高分子化合物等が挙げられる。これらの中で、凝結遅延効果、流動性、及び圧送性が大きい面で、ナフタレンスルホン酸塩、メラミンスルホン酸塩、ポリカルボン酸系高分子化合物の一種又は二種以上を選択使用することがより好ましい。 Examples of the high-performance water reducing agent include a naphthalene sulfonate, a melamine sulfonate, a formalin condensate of an alkyl aryl sulfonate, and a polycarboxylic acid polymer compound. Among these, it is more preferable to select and use one or more of naphthalene sulfonate, melamine sulfonate, and polycarboxylic acid polymer compound in terms of large setting delay effect, fluidity, and pumpability. preferable.
減水剤の使用量は、セメントと膨張材の合計100部に対して、固形物換算で0.1〜５部が好ましく、0.3〜２部がより好ましい。0.1部未満では良好な流動性が得られない場合があり、５部を超えると必要以上の凝結遅延を起こし、強度発現性に悪影響を与える場合がある。 The amount of the water reducing agent used is preferably 0.1 to 5 parts, more preferably 0.3 to 2 parts in terms of solid matter, with respect to a total of 100 parts of cement and expansion material. If it is less than 0.1 part, good fluidity may not be obtained, and if it exceeds 5 parts, the setting delay may be more than necessary, and the strength development may be adversely affected.
本発明で使用する消泡剤は、粉末樹脂混合時の連行空気を減少し、セメント硬化体の圧縮・曲げ強度向上等に寄与するもので、具体的には、ポリオキシアルキレン脂肪酸エステルなどの非イオン界面活性剤が使用可能である。
消泡剤の使用量は、セメントと膨張材の合計100部に対して、0.01〜0.05部が好ましい。0.01部未満では消泡効果が不充分な場合があり、0.05部を超えると泡が発生し材料分離が起こり易くなる場合がある。
The antifoaming agent used in the present invention reduces entrained air at the time of mixing the powder resin and contributes to improving the compression / bending strength of the hardened cement body. Specifically, non-foaming agents such as polyoxyalkylene fatty acid esters are used. Ionic surfactants can be used.
The use amount of the antifoaming agent is preferably 0.01 to 0.05 part with respect to 100 parts in total of the cement and the expansion material. If it is less than 0.01 part, the defoaming effect may be insufficient, and if it exceeds 0.05 part, bubbles may be generated and material separation may easily occur.
本発明で使用する水の量は、ポルトランドセメントと膨張材の合計100部に対して、30〜50部が好ましく、35〜45部がより好ましい。30部未満では充分な流動性が得られない場合があり、50部を超えると充分な耐久性が得られない場合がある。 The amount of water used in the present invention is preferably from 30 to 50 parts, more preferably from 35 to 45 parts, based on 100 parts in total of Portland cement and the expanded material. If it is less than 30 parts, sufficient fluidity may not be obtained, and if it exceeds 50 parts, sufficient durability may not be obtained.
本発明のポリマーセメントモルタル組成物には、さらに必要に応じて、本発明のポリマーグラウトモルタルの目的を阻害しない範囲で他の混和材又は混和剤、即ち、フライアッシュやシリカフュームなどのポゾラン物質、防錆剤、メチルセルロースなどの水中不分離混和剤、増粘剤、保水剤、防水剤、発泡剤、防凍剤、及び着色剤等を併用することが可能である。 The polymer cement mortar composition of the present invention may further contain other admixtures or admixtures, i.e., pozzolanic substances such as fly ash and silica fume, as well as an antibacterial agent as long as they do not impair the purpose of the polymer grout mortar of the present invention. It is possible to use a rusting agent, a non-separable admixture in water such as methylcellulose, a thickener, a water retention agent, a waterproofing agent, a foaming agent, an antifreezing agent, and a coloring agent.
本発明のポリマーセメント組成物は、ポルトランドセメント、膨張材、粉末樹脂、骨材、長さ３〜30mmの繊維物質、収縮低減剤、減水剤、及び消泡剤を成分として含有してなるものであり、本発明のポリマーセメントグラウトモルタルは該ポリマーセメント組成物と水を混合したものである。 The polymer cement composition of the present invention comprises Portland cement, an expansion material, a powder resin, an aggregate, a fiber material having a length of 3 to 30 mm, a shrinkage reducing agent, a water reducing agent, and an antifoaming agent as components. The polymer cement grout mortar of the present invention is a mixture of the polymer cement composition and water.
本発明のポリマーセメントグラウトモルタルは、あらかじめ前記のポリマーセメントモルタル組成物を構成する成分の全部を混合している状態の組成物であって、現場で水を加えて練り混ぜるだけで使用されるプレミックスタイプとなっているものに水のみを添加、混練して調製されることが好ましいが、セメント、膨張材、粉末樹脂、骨材、繊維物質、収縮低減剤、減水剤、及び消泡剤からなる成分を使用現場で混合して調製されるものであってもよい。 The polymer cement grout mortar of the present invention is a composition in which all of the components constituting the polymer cement mortar composition are mixed in advance, and is used by simply adding water and kneading on site. It is preferably prepared by adding and kneading only water to the mixed type, but from cement, expansion material, powder resin, aggregate, fiber material, shrinkage reducing agent, water reducing agent, and antifoaming agent It may be prepared by mixing the components to be used at the site of use.
本発明のポリマーセメントグラウトモルタルを使用した施工方法としては、例えば、コンクリート劣化部分をはつり、鉄筋の錆び落としを実施し、プライマー処理の後、型枠を設置し、型枠内に本発明のポリマーセメントグラウトモルタルを充填し、硬化させる方法等が挙げられる。 As a construction method using the polymer cement grout mortar of the present invention, for example, a concrete deterioration part is hung, a rust is removed from a reinforcing bar, a primer is treated, a mold is installed, and the polymer of the present invention is placed in the mold. For example, a method of filling cement grout mortar and curing it.
本発明のポリマーセメントグラウトモルタルは、例えば、橋脚下や港湾のコンクリート劣化部分の補修だけではなく、アスファルトやコンクリートで舗装された道路、歩道、処理場、及び駐車場の表層の沈下や亀裂が発生した部分を補修するために使用することもできる。 For example, the polymer cement grout mortar of the present invention not only repairs deteriorated parts of concrete at bridge piers and harbors, but also causes subsidence and cracks on the surface of roads, sidewalks, treatment plants, and parking lots paved with asphalt or concrete. It can also be used to repair damaged parts.
本発明のポリマーセメントグラウトモルタルは優れた流動性を有し、長さ変化が小さく、耐久性に優れ、コンクリートとの付着強度特性も優れている。
各種補修工事、なかでも橋梁周囲部の断面修復、港湾構造物コンクリート部位の補修の他、車道や歩道のアスファルトやコンクリートなどによる舗装部の補修部分に充填して補修する用途等に好適に使用できるなどの効果を奏する。
The polymer cement grout mortar of the present invention has excellent fluidity, a small change in length, excellent durability, and excellent adhesion strength properties with concrete.
It can be used suitably for various repair work, especially for repairing cross sections around bridges, repairing concrete parts of harbor structures, and filling and repairing pavement repair parts such as asphalt and concrete on roadways and sidewalks. There are effects such as.
以下、実施例に基づいて本発明を具体的に説明するが、本発明はこれらの実施例によって限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited by these Examples.
セメント100部、膨張材５部、並びに、セメントと膨張材の合計100部に対して、粉末樹脂８部、骨材Ａ／骨材Ｂが60／40部の骨材180部、表１に示す長さの繊維物質0.5部、収縮低減剤４部、減水剤0.3部、及び消泡剤0.02部を配合し、ポリマーセメント組成物を調製した。
調製した、ポリマーセメント組成物中のセメントと膨張材の合計100部に対して、水40部を加えて混練してポリマーセメントグラウトモルタルを作製した。
作製したポリマーセメントグラウトモルタルの静置フロー値、硬化収縮量、圧縮強度、付着強度、及び耐久性を測定・評価した。結果を表１に示す。
Table 1 shows 100 parts of cement, 5 parts of expansive material, and 180 parts of aggregate with 8 parts of powder resin and 60/40 parts of aggregate A / aggregate B for a total of 100 parts of cement and expansive material. A polymer cement composition was prepared by blending 0.5 parts of length fiber material, 4 parts of shrinkage reducing agent, 0.3 part of water reducing agent, and 0.02 part of antifoaming agent.
40 parts of water was added to and kneaded with 100 parts of the cement and the expanded material in the prepared polymer cement composition to prepare a polymer cement grout mortar.
The produced polymer cement grout mortar was measured and evaluated for static flow value, cure shrinkage, compressive strength, adhesion strength, and durability. The results are shown in Table 1.
＜使用材料＞
セメントα：普通ポルトランドセメント、市販品
セメントβ：早強ポルトランドセメント、市販品
膨張材 ：カルシウムサルホアルミネート系膨張材、市販品、ブレーン値6,000cm2/g
粉末樹脂 ：アクリル酸エステル−酢酸ビニル−バーサチック酸ビニル粉末樹脂、市販品
骨材Ａ ：新潟県姫川産天然砂、粒度1.2mm未満、比重2.62
骨材Ｂ ：新潟県姫川産天然砂、粒度1.2〜４mm、比重2.65
減水剤 ：主成分メラミンスルフォン酸塩、市販品、粉状
繊維物質 ：ポリプロピレン繊維、市販品
収縮低減剤：低級アルコールアルキレンオキシド誘導体系、市販品
消泡剤 ：主成分シリコーン、市販品
市販補修用モルタル：住友大阪セメント社製「フィルコンLL」、骨材／セメント比1.2
<Materials used>
Cement α: Normal Portland cement, Commercial cement β: Early strength Portland cement, Commercial expansion material: Calcium sulfoaluminate-based expansion material, commercial product, Blaine value 6,000cm 2 / g
Powder resin: Acrylic acid ester-vinyl acetate-vinyl versatic acid powder resin, commercially available aggregate A: Natural sand from Himekawa, Niigata Prefecture, particle size less than 1.2mm, specific gravity 2.62
Aggregate B: Natural sand from Himekawa, Niigata Prefecture, particle size 1.2-4mm, specific gravity 2.65
Water reducing agent: Main component melamine sulfonate, commercial product, powdered fiber material: Polypropylene fiber, commercial product shrinkage reducing agent: Lower alcohol alkylene oxide derivative, commercial product antifoaming agent: Main component silicone, mortar for commercial product repair : Sumitomo Osaka Cement "Filcon LL", aggregate / cement ratio 1.2
＜測定・評価方法＞
静置フロー値：JIS R 5201-1997の15回の落下運動を与えない場合に準じ、フレッシュ時の性状を20℃で評価、判定基準は200mm以上
硬化収縮量：JIS A 1171「ポリマーセメントモルタルの試験方法」に準じて試験体を作成し、JIS A 1129「モルタル及びコンクリートの長さ変化試験方法」に準じて20℃、60％で28日材齢の乾燥収縮を測定、判定基準は28日の長さ変化率0.05％以下
圧縮強度 ：JIS R 5201-1997に準じ、水中養生28日材齢で評価、判定基準は28日で30N/mm2以上
付着強度 ：JHS 416「モルタル断面修復材・コンクリートとの付着性」に準じ、コンクリート表面に厚さ１cm充填施工し、20℃、85％で28日材齢の付着強度を建研式引張試験機で測定、判定基準は28日材齢で1.5N/mm2以上
耐久性 ：30×30cmのコンクリート板上に、ポリマーセメントモルタルを厚さ１cm充填して充填・施工した。コンクリート板と一体になった試験体を屋外に設置し、ひび割れ発生開始までの日数、ひび割れの程度を評価し、ひび割れ発生までの日数が60日を超え、程度が幅0.2mm未満と極微小のものを○、日数が60日未満で程度が幅0.2〜0.5mmと中のものを△、日数が60日未満で程度が幅0.5超と大のものを×とした。
<Measurement and evaluation method>
Static flow value: In accordance with JIS R 5201-1997, when 15 drops are not applied, the fresh properties are evaluated at 20 ° C. The criterion is 200 mm or more. Curing shrinkage: JIS A 1171 “Polymer cement mortar Specimens were prepared according to `` Test method '', and dry shrinkage at 28 days of age was measured at 20 ° C and 60% according to JIS A 1129 "Test method for length change of mortar and concrete". Length change rate of 0.05% or less Compressive strength: In accordance with JIS R 5201-1997, evaluated under the age of 28 days underwater curing, the criterion is 30N / mm 2 or more in 28 days Adhesion strength: JHS 416 "mortar cross-section repair material According to “Adhesion with concrete”, the concrete surface is filled with 1cm thickness, and the adhesion strength at 28 days of age at 20 ° C and 85% is measured with a Kenken tensile tester. 1.5 N / mm 2 or more durability: 30 × 30 cm concrete plate, and a thickness of 1cm filled with polymer cement mortar It was and construction Hama. A test body integrated with a concrete plate is installed outdoors, and the number of days until cracking starts and the degree of cracking are evaluated. The number of days until cracking exceeds 60 days, and the width is less than 0.2 mm. Goods were marked with ◯, days with less than 60 days and a width of 0.2 to 0.5 mm in the middle, and △, days with less than 60 days and a width of more than 0.5 with a width of x.
セメントα100部、膨張材５部、並びに、セメントと膨張材の合計100部に対して、粉末樹脂８部、骨材Ａ／骨材Ｂが60／40部で表２に示す量の骨材、長さ６mmの繊維0.5部、収縮低減剤４部、減水剤0.3部、及び消泡剤0.02部を配合し、ポリマーセメント組成物を調製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。 100 parts of cement α, 5 parts of expanded material, and 100 parts of cement and expanded material, 8 parts of powder resin, 60/40 parts of aggregate A / aggregate B, and the amount of aggregate shown in Table 2, The same procedure as in Example 1 was conducted except that 0.5 parts of a fiber having a length of 6 mm, 4 parts of a shrinkage reducing agent, 0.3 part of a water reducing agent, and 0.02 part of a defoaming agent were blended to prepare a polymer cement composition. The results are also shown in Table 2.
セメントα100部、セメントα100部に対して表３に示す膨張材、並びに、セメントと膨張材の合計100部に対して、粉末樹脂８部、骨材Ａ／骨材Ｂが60／40部の骨材180部、長さ６mmの繊維物質0.5部、収縮低減剤４部、減水剤0.3部、及び消泡剤0.02部を配合し、ポリマーセメント組成物を調製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。 Bone of cement α100 parts, expansive material shown in Table 3 for cement α100 parts, and powder resin 8 parts, aggregate A / aggregate B 60/40 parts for a total of 100 parts of cement and expansive material Example 1 except that 180 parts of material, 0.5 parts of 6 mm long fiber material, 4 parts of shrinkage reducing agent, 0.3 part of water reducing agent, and 0.02 part of antifoaming agent were blended to prepare a polymer cement composition. went. The results are also shown in Table 3.
セメントα100部、膨張材５部、並びに、セメントと膨張材の合計100部に対して、表４に示す粉末樹脂、骨材Ａ／骨材Ｂが60／40部の骨材180部、長さ６mmの繊維物質0.5部、収縮低減剤４部、減水剤0.3部、及び消泡剤0.02部を配合し、ポリマーセメント組成物を調製し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。 100 parts of cement α, 5 parts of expanded material, and 100 parts of cement and expanded material, powder resin shown in Table 4, aggregate A / aggregate B 60/40 parts of aggregate, 180 parts in length The same procedure as in Example 1 was conducted except that 0.5 parts of 6 mm fiber material, 4 parts of shrinkage reducing agent, 0.3 part of water reducing agent, and 0.02 part of antifoaming agent were blended to prepare a polymer cement composition. The results are also shown in Table 4.
セメントα100部、膨張材５部、並びに、セメントと膨張材の合計100部に対して、粉末樹脂８部、骨材Ａ／骨材Ｂが60／40部の骨材180部、表５に示す繊維物質、収縮低減剤４部、減水剤0.3部、及び消泡剤0.02部を配合し、ポリマーセメント組成物を調製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。 Table 5 shows 100 parts of cement α, 5 parts of expanded material, and 180 parts of aggregate with 60/40 parts of aggregate A / aggregate B for 8 parts of powder resin and 100 parts in total of cement and expanded material. The same procedure as in Example 1 was conducted except that a fiber cement, 4 parts of a shrinkage reducing agent, 0.3 part of a water reducing agent, and 0.02 part of an antifoaming agent were blended to prepare a polymer cement composition. The results are also shown in Table 5.
セメントα100部、膨張材５部、並びに、セメントと膨張材の合計100部に対して、粉末樹脂８部、骨材Ａ／骨材Ｂが60／40部の骨材180部、長さ６mmの繊維物質0.5部、表６に示す収縮低減剤、減水剤0.3部、及び消泡剤0.02部を配合し、ポリマーセメント組成物を調製したこと以外は実施例１と同様に行った。結果を表６に併記する。 100 parts of cement α, 5 parts of expansive material, and a total of 100 parts of cement and expansive material, powder resin 8 parts, aggregate A / aggregate B 60/40 parts of aggregate 180 parts, length 6 mm The same procedure as in Example 1 was conducted except that 0.5 parts of the fiber material, 0.3 parts of the shrinkage reducing agent shown in Table 6, 0.3 part of the water reducing agent, and 0.02 part of the antifoaming agent were blended to prepare a polymer cement composition. The results are also shown in Table 6.
セメントαを使用し、ポリマーセメント組成物中のセメントと膨張材の合計100部に対して、表７に示す水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７に併記する。 The same procedure as in Example 1 was carried out except that cement α was used and water shown in Table 7 was used for a total of 100 parts of the cement and the expanded material in the polymer cement composition. The results are also shown in Table 7.
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