JP5939776B2 - Repair mortar composition - Google Patents
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- JP5939776B2 JP5939776B2 JP2011261915A JP2011261915A JP5939776B2 JP 5939776 B2 JP5939776 B2 JP 5939776B2 JP 2011261915 A JP2011261915 A JP 2011261915A JP 2011261915 A JP2011261915 A JP 2011261915A JP 5939776 B2 JP5939776 B2 JP 5939776B2
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- 239000004570 mortar (masonry) Substances 0.000 title claims description 69
- 239000000203 mixture Substances 0.000 title claims description 61
- 230000008439 repair process Effects 0.000 title claims description 38
- 239000004568 cement Substances 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 25
- 239000004567 concrete Substances 0.000 claims description 24
- 229920000642 polymer Polymers 0.000 claims description 24
- 229920005989 resin Polymers 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 239000004480 active ingredient Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 13
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 12
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 12
- 229920000620 organic polymer Polymers 0.000 claims description 10
- 239000011414 polymer cement Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 9
- 239000002562 thickening agent Substances 0.000 claims description 9
- 239000004815 dispersion polymer Substances 0.000 claims description 8
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 239000002174 Styrene-butadiene Substances 0.000 claims description 6
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 6
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 6
- 239000011115 styrene butadiene Substances 0.000 claims description 6
- 229920000058 polyacrylate Polymers 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 239000004584 polyacrylic acid Substances 0.000 claims description 4
- 229920000126 latex Polymers 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- PROZFBRPPCAADD-UHFFFAOYSA-N ethenyl but-3-enoate Chemical compound C=CCC(=O)OC=C PROZFBRPPCAADD-UHFFFAOYSA-N 0.000 claims 1
- -1 vinyl versatic acid Chemical compound 0.000 claims 1
- 238000010276 construction Methods 0.000 description 15
- 239000002518 antifoaming agent Substances 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 238000004898 kneading Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000001913 cellulose Chemical class 0.000 description 3
- 229920002678 cellulose Chemical class 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 125000005396 acrylic acid ester group Chemical group 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000011396 hydraulic cement Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011433 polymer cement mortar Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920001567 vinyl ester resin Polymers 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 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
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 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
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 239000011388 polymer cement concrete Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、セメント硬化体構造物の劣化箇所の補修や劣化防止補強に用いるモルタル組成物に関するもので、特に飲料用水と接する可能性のあるモルタルやコンクリート質の上水道施設の補修及び補強用に用いるモルタル組成物に関する。 The present invention relates to a mortar composition used for repairing a deteriorated portion of a hardened cementitious structure and for preventing deterioration, and particularly used for repairing and reinforcing mortar and concrete water supply facilities that may come into contact with drinking water. It relates to a mortar composition.
モルタルやコンクリート製の構造物（以下、コンクリート構造物と称す。）の劣化部位の断面修復や増厚補強等に用いる補修材は、躯体との一体性や耐久性の点でセメント系の材料が適している。その中でも下地との密着性に優れること、透水性や通気性が低く耐食性に優れること等の理由で、水硬性セメントとその質量の数％に相当する量の有機ポリマーとからなるポリマーセメントを結合相成分としたモルタル組成物が広く用いられている。（例えば、特許文献１〜２参照。）大型断面の床壁等の補修用にポリマーセメント系モルタル組成物を使うと、補修部にひび割れが生じ易くなることから、繊維を配合し、ひび割れを抑制することも行われている。（例えば、特許文献３参照。）このように一般のコンクリート構造物の補修・補強用には優れた適性を備えたポリマーセメント系モルタル組成物ではあるが、例えば、飲料用の水と接する可能性のある上水道施設のモルタルやコンクリート質の構造物の補修・補強用の補修材に関しては、フェノール等の有害成分が施工樹脂から水中に溶出・混入することが指摘されて以来、有機ポリマーや樹脂繊維の配合使用が敬遠される傾向にある。さらには当該構造物に対しては、プライマー類の使用も敬遠されている。 Repair materials used for cross-sectional restoration and thickening reinforcement of mortar and concrete structures (hereinafter referred to as concrete structures) are made of cement-based materials in terms of integrity and durability with the frame. Is suitable. Among them, polymer cement composed of hydraulic cement and organic polymer in an amount equivalent to several percent of its mass is combined for reasons such as excellent adhesion to the substrate, low water permeability and air permeability, and excellent corrosion resistance. Mortar compositions as phase components are widely used. (For example, refer to Patent Documents 1 and 2.) When a polymer cement mortar composition is used for repairing a floor wall or the like having a large cross section, cracks are likely to occur in the repaired part. It has also been done. (For example, refer to Patent Document 3.) Thus, although it is a polymer cement-based mortar composition having excellent suitability for repair and reinforcement of a general concrete structure, for example, there is a possibility of contact with water for drinking. As for repair materials for repair and reinforcement of mortars and concrete structures in water supply facilities, organic polymers and resin fibers have been used since it was pointed out that harmful components such as phenol were eluted and mixed into the water from construction resins. Tends to be avoided. Furthermore, the use of primers is also avoided for the structure.
一方、繊維やポリマーセメント用の有機ポリマー（以下、セメント用ポリマーという。）を含まないセメント系モルタル組成物は、コンクリート構造物との密着性と耐久性の確保が課題となる。単位セメント量を増大するか、水セメント比を低くすれば密着性と耐久性等は向上するものの、コンシステンシーが減少し、施工作業性が低下する。減水剤の使用で流動性を確保することは可能であるが、減水剤は一般に有機ポリマーを有効成分とするため、密着性を高めたモルタル組成物に良好なワーカビリティを付与できるほどの流動性を発現させられる十分な量を使用できない。また、水和熱の増大に伴う温度ひび割れの発生や、乾燥・硬化時の収縮量が大きいため寸法安定性に欠け、躯体との一体性が得難くなる。シリカフュームやスラグ微粉を配合すると（例えば、特許文献４〜５参照。）、水和熱の増大化抑制や組織の緻密化は達成できるが、自己収縮が大きいため、収縮に伴うひび割れ発生の危惧は依然解消されない。このように、セメント用ポリマーや樹脂繊維を含まずに、実質的に無機成分で構成されたモルタル組成物で、例えば密着性や幅広い施工手段に対応できる作業性などセメント系構造物への補修材に適った性状を具備した組成物は満足に得られていないのが実状である。 On the other hand, a cement-based mortar composition that does not contain fibers or an organic polymer for polymer cement (hereinafter referred to as cement polymer) has a problem of ensuring adhesion and durability with a concrete structure. Increasing the unit cement amount or lowering the water cement ratio improves adhesion and durability, but decreases consistency and lowers workability. Although it is possible to ensure fluidity by using a water reducing agent, the water reducing agent generally uses an organic polymer as an active ingredient, so the fluidity is sufficient to give good workability to a mortar composition with improved adhesion. Not enough can be used to express In addition, the occurrence of temperature cracks due to an increase in heat of hydration and the large amount of shrinkage during drying and curing result in lack of dimensional stability, making it difficult to obtain integrity with the casing. When silica fume and slag fine powder are blended (see, for example, Patent Documents 4 to 5), increase in heat of hydration and densification of the structure can be achieved, but since self-shrinkage is large, there is a risk of cracking due to shrinkage. Still not resolved. Thus, a mortar composition that is substantially composed of inorganic components and does not contain cement polymers or resin fibers, such as a repair material for cement-based structures such as adhesion and workability that can handle a wide range of construction methods. The actual condition is that a composition having properties suitable for the above has not been obtained satisfactorily.
本発明は、良好な施工性を呈し、コンクリート構造物等の躯体に容易且つ強固に密着できると共に、施工後の耐久性低下に繋がる強度低下やひび割れ発生もなく、かつ液体及び固体状の有機物質の水中への溶出や混入も起こらない補修用モルタル組成物の提供を課題とする。 The present invention exhibits good workability, can be easily and firmly adhered to a frame such as a concrete structure, has no strength reduction or cracking that leads to durability deterioration after construction, and is a liquid or solid organic substance. It is an object to provide a mortar composition for repair that does not cause elution or mixing of water into water.
本発明者は、前記課題解決のため検討を行った結果、特定のポゾラン反応性物質と石膏を特定の配合量で含有させたセメントモルタルが、ポリマーセメント用ポリマー及び繊維を配合しなくともコンクリート構造物に対し優れた密着性を呈し、しかも施工作業性に支障を及ぼさないような流動性が得られること等の知見を得、本発明を完成した。 As a result of investigations for solving the above problems, the present inventor has found that a cement mortar containing a specific pozzolanic reactive substance and gypsum in a specific blending amount has a concrete structure without blending a polymer and polymer for polymer cement. The present invention was completed by obtaining the knowledge that fluidity that exhibits excellent adhesion to an object and that does not hinder the workability is obtained.
即ち、本発明は、次の（１）〜（４）で表す補修用モルタル組成物である。（１）次の（Ａ）〜（Ｅ）を含有し、モルタル組成物で結合相成分のポリマーセメントを構成する有機系ポリマーであるセメント用ポリマー、活性シリカ及び繊維を含まないことを特徴とする補修用モルタル組成物。（Ａ）セメント１００質量部、（Ｂ）メタカオリン１〜２０質量部、（Ｃ）最大粒径が０．１ｍｍ以上１ｍｍ未満である石灰石及び／又は最大粒径が０．０５ｍｍ以上１ｍｍ未満である炭酸カルシウムの微粉１０〜３０質量部、（Ｄ）膨張材１〜５質量部、（Ｅ）細骨材１００〜３００質量部。（２）セメント用ポリマーが、アクリル系ポリマーエマルション、酢酸ビニル系ポリマーエマルション、スチレンブタジエンゴムラテックス、酢酸ビニル系再乳化形粉末樹脂、ポリアクリル酸エステルを有効成分とするポリマーディスパージョン、スチレンブタジエンを有効成分とするポリマーディスパージョン、エチレン酢酸ビニルを有効成分とするポリマーディスパージョン、ポリアクリル酸エステルを有効成分とする再乳化形粉末樹脂、スチレンブタジエンを有効成分とする再乳化形粉末樹脂、エチレン酢酸ビニルを有効成分とする再乳化形粉末樹脂、酢酸ビニル／バーサチィック酸ビニルエステルを有効成分とする再乳化形粉末樹脂または酢酸ビニル／バーサチィック酸ビニル／アクリル酸エステルを有効成分とする再乳化形粉末樹脂の少なくとも１種からなる前記（１）の補修用モルタル組成物。（３）さらに、セメント１００質量部に対し、（Ｆ）減水剤、（Ｇ）増粘剤及び（Ｈ）消泡剤を合計で０．１５〜１．５質量部含む前記（１）又は（２）の補修用モルタル組成物。（４）モルタル又はコンクリート質の上水道施設に用いられる前記（１）〜（３）何れかの補修用モルタル組成物。
That is, this invention is the mortar composition for repair represented by following (1)-(4). (1) It contains the following (A) to (E), and does not include a polymer for cement which is an organic polymer constituting a polymer cement of a binder phase component with a mortar composition, active silica and fibers. Repair mortar composition. (A) 100 parts by mass of cement, (B) 1 to 20 parts by mass of metakaolin, (C) limestone having a maximum particle size of 0.1 mm or more and less than 1 mm and / or carbonic acid having a maximum particle size of 0.05 mm or more and less than 1 mm. 10 to 30 parts by mass of fine calcium powder, (D) 1 to 5 parts by mass of an expanded material, and (E) 100 to 300 parts by mass of fine aggregate. (2) Cement polymer is acrylic polymer emulsion, vinyl acetate polymer emulsion, styrene butadiene rubber latex, vinyl acetate re-emulsified powder resin, polymer dispersion containing polyacrylate as active ingredient, styrene butadiene is effective Polymer dispersion as an ingredient, Polymer dispersion containing ethylene vinyl acetate as an active ingredient, Re-emulsifying powder resin containing polyacrylic acid ester as an active ingredient, Re-emulsifying powder resin containing styrene butadiene as an active ingredient, Ethylene vinyl acetate Re-emulsifying powder resin containing as an active ingredient, re-emulsifying powder resin containing vinyl acetate / versaic acid vinyl ester as an active ingredient, or re-emulsifying powder tree containing vinyl acetate / versaic acid vinyl / acrylic acid ester as an active ingredient Repair mortar composition of the consisting of at least one (1). (3) Further, the above (1) or (1) containing 0.15 to 1.5 parts by mass of (F) water reducing agent, (G) thickener and (H) antifoaming agent with respect to 100 parts by mass of cement. The mortar composition for repair of 2). (4) The mortar composition for repair according to any one of (1) to (3), which is used in a mortar or concrete water supply facility.
本発明によれば、コンクリート構造物の補修・補強に適し、施工適用性や作業性が良好で、液体や固体状の有機ポリマー物質の水中溶出・混入が実質的に起こらない≡耐久の補修材が提供される。 According to the present invention, it is suitable for repair / reinforcement of concrete structures, has good construction applicability and workability, and does not substantially dissolve or mix liquid or solid organic polymer substances in water. Is provided.
本発明のモルタル組成物は、以下の（Ａ）〜（Ｅ）で表す成分を必須含有するものであって、モルタル組成物で結合相成分のポリマーセメントを構成する有機系ポリマーであるセメント用ポリマー、活性シリカ及び繊維を含まないものである。
The mortar composition of the present invention essentially contains the components represented by the following (A) to (E), and is a polymer for cement which is an organic polymer that constitutes the polymer cement of the binder phase component with the mortar composition. It does not contain active silica and fibers.
本補修用モルタル組成物に含有される（Ａ）セメントは、水硬性のセメントであって、例えば、普通、早強、超早強、中庸熱、低熱、耐硫酸塩等の各種ポルトランドセメント、白色セメントやアルミナセメント等の特殊セメントを挙げることができ、このうち２種以上の種類を併用しても良い。使用可能なセメントは、ここに例示したものに必ずしも限定されないが、収縮量が大きいことから高炉セメントやフライアッシュセメント等の混合セメントの単独使用は可能なら避ける方が望ましい。 The (A) cement contained in the repairing mortar composition is a hydraulic cement, for example, ordinary, early strength, ultra-early strength, moderate heat, low heat, sulfate resistant portland cement, white Special cements such as cement and alumina cement can be mentioned, and two or more of these may be used in combination. Usable cements are not necessarily limited to those exemplified here, but because of the large shrinkage, it is desirable to avoid the use of mixed cements such as blast furnace cement and fly ash cement when possible.
本発明の補修用モルタル組成物は、（Ｂ）メタカオリンを含有する。本発明で称するメタカオリンは、含水珪酸塩鉱物のカオリナイトから例えば加熱処理等によってその脱水鉱物相であるムライトが形成されるまでに経過或いは出現する中間体の総称である。メタカオリンの粉末そのものは高活性であり、また活性シリカ等の大量使用では往々に見られる硬化物の大規模な体積減少を引き起こすこともなく、≡緻密な硬化体を得るのに有利である。このようなメタカオリンは、入手可能なものなら何れのものでも良い。メタカオリンの使用により、耐久性と特に付着強度の向上作用を付与できる。一般にポリマーセメントを用いた時に見られる躯体への強い密着性は、本発明のモルタル組成物では、メタカオリンと水硬性物質等との相乗作用によって、これに類似する性状が発現される。メタカオリンは、含有セメント１００質量部に対し、１〜２０質量部含有される。１質量部未満の含有では収縮及び乾燥ひび割れが発生する虞があり、付着強度向上も十分達成されないので好ましくない。また、含有量が２０質量部を超えると耐久性と付着強度は殆ど向上せず、原料コストの高騰をもたらすだけなので好ましくない。メタカオリンの粒度は、適度な反応性を発現させる上で１５００ｃｍ2／ｇ以上であることが推奨され、より好ましくは３０００〜１２０００ｃｍ2／ｇとする。１２０００ｃｍ2／ｇを超える粒度でも反応性や所望の作用効果を得るには支障はないが、粉砕コストが高騰するため実用的でない。 The repair mortar composition of the present invention contains (B) metakaolin. The metakaolin referred to in the present invention is a generic term for intermediates that have elapsed or appeared from kaolinite, a hydrous silicate mineral, to the formation of mullite, which is a dehydrated mineral phase, by, for example, heat treatment. The metakaolin powder itself is highly active, and the use of a large amount of active silica or the like is advantageous for obtaining a ≡ dense hardened body without causing a large-scale volume reduction of the hardened material often seen. Such metakaolin may be any available one. By using metakaolin, it is possible to impart an effect of improving durability and particularly adhesion strength. In general, the strong adhesion to the skeleton seen when using polymer cement exhibits similar properties to the mortar composition of the present invention due to the synergistic action of metakaolin and a hydraulic substance. Metakaolin is contained in an amount of 1 to 20 parts by mass with respect to 100 parts by mass of the contained cement. If the content is less than 1 part by mass, shrinkage and dry cracking may occur and adhesion strength is not sufficiently improved, which is not preferable. On the other hand, if the content exceeds 20 parts by mass, the durability and adhesion strength are hardly improved, and only the raw material cost is increased. The particle size of the metakaolin, it is on at 1500 cm 2 / g or more to express moderate reactivity is recommended, more preferably 3000~12000cm 2 / g. Even if the particle size exceeds 12000 cm 2 / g, there is no problem in obtaining the reactivity and the desired effect, but it is not practical because the pulverization cost increases.
本発明の補修用モルタル組成物は、（Ｃ）石灰石及び／又は炭酸カルシウムの微粉を含有する。これら各微粉は最大粒径が実質１ｍｍ未満のものであれば良い。石灰石や炭酸カルシウムは、微粉であること以外は制限されない。石灰石や炭酸カルシウムの微粉は、何れか一方のみを含有する場合はその含有量を、また両者を含有する場合は両者の合計含有量で、セメント１００質量部に対し１０〜３０質量部、好ましくは１５〜３０質量部とすることにより、注水後のモルタルの混練抵抗が減少し、配合成分の混合性やモルタルの流動性が高まる。１０質量部未満では含有効果が殆ど見られず、また３０質量部を超えると補修用モルタル組成物の強度低下や硬化遅延を起こす虞があるので好ましくない。 The repair mortar composition of the present invention contains (C) fine powder of limestone and / or calcium carbonate. Each of these fine powders only needs to have a maximum particle size of substantially less than 1 mm. Limestone and calcium carbonate are not limited except that they are fine powder. The limestone and calcium carbonate fine powders contain only one of them, and if they contain both, the total content of both is 10 to 30 parts by weight, preferably 100 parts by weight of cement. By setting it as 15-30 mass parts, the kneading | mixing resistance of the mortar after water injection will reduce, and the mixability of a compounding component and the fluidity | liquidity of a mortar will increase. If the amount is less than 10 parts by mass, the inclusion effect is hardly observed, and if it exceeds 30 parts by mass, the strength of the repair mortar composition may be lowered or the curing may be delayed.
本発明の補修用モルタル組成物は、（Ｄ）膨張材を含有する。膨張材は、生石灰系のものとエトリンガイト系のものに大別されるが、本発明ではその何れをも含有使用でき、これら以外の膨張材でも使用できる。膨張材の含有により収縮が抑制されてひび割れが発生し難くなることに加え、施工物としての寸法安定性が得られるため、下地となるコンクリート構造物との一体性が保たれる。膨張材の含有量はセメント１００質量部に対し、１〜５質量部とする。含有量が１質量部未満では十分な収縮抑制効果が得られないので好ましくなく、また５質量部を超えると過膨張を起こす虞があるので好ましくない。 The repairing mortar composition of the present invention contains (D) an expanding material. Inflatable materials are roughly classified into quicklime-based materials and ettringite-based materials, but any of them can be used in the present invention, and other expanded materials can also be used. In addition to suppressing shrinkage due to the inclusion of the expansion material and making it difficult for cracks to occur, dimensional stability as a construction object is obtained, so that the integrity with the concrete structure as the foundation is maintained. The content of the expansion material is 1 to 5 parts by mass with respect to 100 parts by mass of cement. If the content is less than 1 part by mass, a sufficient shrinkage-inhibiting effect cannot be obtained, and if it exceeds 5 parts by mass, overexpansion may occur, which is not preferable.
本発明の補修用モルタル組成物は、（Ｅ）細骨材を含有する。細骨材は、モルタルやコンクリートに使用できるものであって鉱物質のものなら、結晶質、ガラス質、固溶体の何れでも良く、特に限定されない。具体的には例えば、山砂、川砂、海砂、砕砂の天然細骨材、岩石・粘土等を主体とする原料を焼成してなる人工細骨材等を挙げることができる。また、軽量骨材も使用することができ、補修箇所によっては補修施工物の質量を軽減できるので有利なこともあるが、普通骨材に比べると強度面で不足するため、使用する場合は普通骨材との併用が推奨される。尚、鉱物質以外の骨材、特に樹脂製の軽量骨材の使用は好ましくない。細骨材の含有量はセメント１００質量部に対し、１００〜３００質量部、好ましくは１５０〜３００質量部とする。含有量が１００質量部未満では収縮が過大になる可能性があるので好ましくなく、また３００質量部を超えると結合相形成成分の含有割合が相対的に低下することから強度低下を起こすので好ましくない。 The repairing mortar composition of the present invention contains (E) fine aggregate. The fine aggregate is not particularly limited as long as it can be used for mortar and concrete, and may be crystalline, glassy or solid solution as long as it is a mineral. Specific examples include natural fine aggregates such as mountain sand, river sand, sea sand and crushed sand, and artificial fine aggregates obtained by firing raw materials mainly composed of rocks and clays. Lightweight aggregates can also be used, and depending on the repair location, the mass of the repaired work can be reduced, which may be advantageous. However, the strength is insufficient compared to ordinary aggregates. Use with aggregate is recommended. In addition, it is not preferable to use aggregates other than mineral substances, particularly lightweight aggregates made of resin. The content of the fine aggregate is 100 to 300 parts by mass, preferably 150 to 300 parts by mass with respect to 100 parts by mass of cement. If the content is less than 100 parts by mass, the shrinkage may be excessive, which is not preferable, and if it exceeds 300 parts by mass, the content of the binder phase forming component is relatively decreased, which causes a decrease in strength. .
本発明の補修用モルタル組成物で含有されないセメント用ポリマーとは、いわゆるポリマーセメントを構成する有機系のポリマーであり、例えばＪＩＳ Ａ ６２０３の「セメント混和用ポリマーディスパージョン及び再乳化粉末樹脂」に記載されているポリマーが挙げられる。より具体的には、例えば、アクリル系ポリマーエマルション、酢酸ビニル系ポリマーエマルション、スチレンブタジエンゴムラテックス、酢酸ビニル系再乳化粉末樹脂、ベオバ系再乳化粉末樹脂に規定されているようなポリアクリル酸エステル、スチレンブタジエン若しくはエチレン酢酸ビニルを有効成分とするポリマーディスパージョン又はポリアクリル酸エステル、スチレンブタジエン、エチレン酢酸ビニル、酢酸ビニル／バーサチック酸ビニルエステル若しくは酢酸ビニル／バーサチック酸ビニル／アクリル酸エステルを有効成分とする再乳化粉末樹脂を挙げることができる。このようなポリマーは本発明の補修用モルタル組成物では実質的に含有されないものでなければならない。ここで、実質的に含有されないとは、ポリマーセメントに使用されるようなポリマーであっても、他の作用を奏させるための用途に用いられる混和剤に一部含まれる場合は、混和剤としての使用量（モルタル組成物中の当該ポリマー成分の含有量）が、一般的な補修用のポリマーセメントモルタルやコンクリート中でのポリマー含有量に比べ著しく少ない量である限り許容されることを意味する。 The polymer for cement which is not contained in the repair mortar composition of the present invention is an organic polymer constituting so-called polymer cement. For example, it is described in “polymer dispersion for cement admixture and re-emulsified powder resin” in JIS A 6203. The polymer currently used is mentioned. More specifically, for example, polyacrylic acid ester as defined in acrylic polymer emulsion, vinyl acetate polymer emulsion, styrene butadiene rubber latex, vinyl acetate re-emulsified powder resin, Veova re-emulsified powder resin, Polymer dispersion or polyacrylic acid ester containing styrene butadiene or ethylene vinyl acetate as an active ingredient, styrene butadiene, ethylene vinyl acetate, vinyl acetate / versaic acid vinyl ester or vinyl acetate / vinyl versatate / acrylic acid ester as an active ingredient Mention may be made of re-emulsified powder resins. Such polymers should be substantially free of the repair mortar composition of the present invention. Here, “substantially not contained” means that even if the polymer is used in polymer cement, if it is partially included in the admixture used for other functions, This means that the amount of use (content of the polymer component in the mortar composition) is acceptable as long as it is significantly less than the polymer content in general repair polymer cement mortar and concrete. .
また、本発明の補修用モルタル組成物で含有されない繊維とは、一般にモルタルやコンクリートに配合使用することができる繊維であって、繊維の長さや直径に拘わらず、高分子物質を構成成分とする樹脂繊維であれば全て該当し、さらに金属繊維や炭素や硼素等のセラミック繊維も該当する。本発明の補修用モルタル組成物は、繊維と前記のセメント用ポリマーを含まないため、水と接する部位に該補修用モルタル組成物を施工しても、該施工物から有機ポリマーや異物が水中へ溶出・混入する虞が実質的に生じない。 The fiber not contained in the repairing mortar composition of the present invention is a fiber that can be generally used in mortar and concrete, and includes a polymer substance as a constituent regardless of the length or diameter of the fiber. Any resin fiber is applicable, and metal fibers and ceramic fibers such as carbon and boron are also applicable. Since the repair mortar composition of the present invention does not include fibers and the above-mentioned cement polymer, even if the repair mortar composition is applied to a site in contact with water, the organic polymer and foreign matter are introduced into the water from the application. There is virtually no risk of elution or contamination.
また、本発明の補修用モルタル組成物は、前記（Ａ）〜（Ｅ）の必須含有成分の他に、さらに（Ｆ）減水剤、（Ｇ）増粘剤及び（Ｈ）消泡剤を合計でセメント１００質量部に対し、合計で０．１５〜１．５質量部含むものが好ましい。これらの成分は各成分本来の機能付与のために用いられる。即ち、減水剤は減水性付与の為、増粘材は増粘性付与の為、そして消泡剤は消泡作用を及ぼす為に用いる。個々の成分の含有量は、含有量を多くするほど当該成分由来の作用が強まることを考慮し、施工対象物や施工環境等に応じて適宜設定すれば良い。合計含有量が０．１５質量部未満では配合効果が殆ど得られないことがあり、また１．５質量部を超えるとモルタル組成物中のポリマー量が増大し、接水施工物では温度等の環境によってはポリマー成分が水中に溶出する虞が高まるので適当ではない。 Moreover, the mortar composition for repair of this invention is the sum total of (F) water reducing agent, (G) thickener, and (H) antifoaming agent other than the essential component of said (A)-(E). Therefore, it is preferable to include 0.15 to 1.5 parts by mass in total with respect to 100 parts by mass of cement. These components are used for imparting the original function of each component. That is, the water reducing agent is used for imparting water reduction, the thickener is used for imparting thickening, and the antifoaming agent is used for exerting an antifoaming action. The content of each component may be appropriately set according to the construction object, the construction environment, etc. in consideration of the fact that as the content is increased, the action derived from the component becomes stronger. When the total content is less than 0.15 parts by mass, the blending effect may be hardly obtained. When the total content exceeds 1.5 parts by mass, the amount of polymer in the mortar composition increases. Depending on the environment, there is an increased risk of the polymer component eluting into water, which is not appropriate.
含有できる（Ｆ）減水剤は、モルタルやコンクリートに使用できるものであって、減水作用を有すものなら、分散剤、高性能減水剤、ＡＥ減水剤、高性能ＡＥ減水剤又は流動化剤と称されているものの何れでも良く、有効成分も限定されない。減水剤の配合効果を得る為の推奨含有量は、セメント１００質量部に対し、０．０５質量部以上であれば相応の減水作用が得られ、高い強度が得易くなる。 The water-reducing agent (F) that can be contained can be used for mortar and concrete, and if it has a water-reducing action, it can contain a dispersant, a high-performance water-reducing agent, an AE water-reducing agent, a high-performance AE water-reducing agent, or a fluidizing agent. Any of these may be used, and the active ingredient is not limited. If the recommended content for obtaining the blending effect of the water reducing agent is 0.05 parts by mass or more with respect to 100 parts by mass of the cement, an appropriate water reducing action is obtained, and high strength is easily obtained.
また、含有できる（Ｇ）増粘剤は、セメントペースト、モルタル又はコンクリートに増粘性を付与できるものであれば限定されず、例えば、各種多糖類、セルロース誘導体、水溶性蛋白質などが使用できる。より好ましくは、適度な保水作用を有して急激な乾燥によるひび割れ発生が抑制できることから、水溶性セルロース誘導体が良い。増粘剤により、材料分離を抑制できることに加え、施工時の補修対象躯体への接着強度も増進される。増粘剤の配合効果を得る為の推奨含有量は、含有量は、セメント１００質量部に対し、０．０５質量部以上である。 Further, the (G) thickener that can be contained is not limited as long as it can impart thickening to cement paste, mortar, or concrete. For example, various polysaccharides, cellulose derivatives, water-soluble proteins, and the like can be used. More preferably, a water-soluble cellulose derivative is preferable because it has an appropriate water retention action and can suppress the occurrence of cracks due to rapid drying. In addition to being able to suppress material separation by the thickener, the adhesion strength to the repair target chassis during construction is also improved. The recommended content for obtaining the blending effect of the thickener is 0.05 parts by mass or more with respect to 100 parts by mass of cement.
また、含有できる（Ｈ）消泡剤は、モルタル又はコンクリートに使用できる消泡剤であれば何れのものでも含有できる。消泡剤の使用により施工物内に気泡が残存し難くなるため、強度・耐久性が向上する。消泡剤の配合効果を得る為の推奨含有量は、セメント１００質量部に対し、０．０５質量部以上である。また、より好ましくは、消泡剤含有量は０．５質量部以下とする。０．５質量部を超えると硬化不良を引き起こすことがあるので適当でない。 The antifoaming agent that can be contained (H) can be any antifoaming agent that can be used for mortar or concrete. The use of an antifoaming agent makes it difficult for bubbles to remain in the construction, thus improving strength and durability. The recommended content for obtaining the blending effect of the antifoaming agent is 0.05 parts by mass or more with respect to 100 parts by mass of cement. More preferably, the defoamer content is 0.5 parts by mass or less. If it exceeds 0.5 parts by mass, it may cause a curing failure, which is not appropriate.
また、本発明の補修用モルタル組成物は、前記（Ａ）〜（Ｈ）で表された以外のモルタルやコンクリート用の混和剤・材も、本発明の効果を喪失させない範囲で含有することができる。具体的には、例えば、凝結促進剤、凝結遅延剤、増量材、収縮低減剤、撥水剤、白華防止剤等を挙げることができるが、この記載例に限定されるものではない。また、より好ましくは、前記（Ａ）〜（Ｈ）以外の有機系混和剤・材を配合させる場合は、当該有機系混和剤・材と前記の（Ｆ）減水剤、（Ｇ）増粘剤及び（Ｈ）消泡剤の総合計含有量を、セメント１００質量部に対し、最大１．５質量部とする。 Further, the repair mortar composition of the present invention may contain mortar and concrete admixtures / materials other than those represented by the above (A) to (H) as long as the effects of the present invention are not lost. it can. Specifically, for example, a setting accelerator, a setting retarder, an extender, a shrinkage reducing agent, a water repellent, a whitening prevention agent, and the like can be mentioned, but the present invention is not limited to this description example. More preferably, when an organic admixture / material other than the above (A) to (H) is blended, the organic admixture / material and the (F) water reducing agent, (G) thickener. And (H) The total amount of the antifoaming agent is set to 1.5 parts by mass at the maximum with respect to 100 parts by mass of cement.
また、本発明の補修用モルタル組成物の混練水の含有量は特に制限されない。好ましくはセメント１００質量部に対し、混練水４０〜８０質量部含有したものとする。混練水の量が、４０質量部未満では施工に適した流動性が得難くなるので適当ではなく、また８０質量部を超えると強度が低下するので適当ではない。 Further, the content of the kneading water in the repair mortar composition of the present invention is not particularly limited. Preferably, 40 to 80 parts by mass of kneaded water is contained per 100 parts by mass of cement. If the amount of the kneaded water is less than 40 parts by mass, it is difficult to obtain fluidity suitable for construction, and if it exceeds 80 parts by mass, the strength decreases.
本発明の補修用モルタル組成物は、例えばコンクリート構造物に生じた劣化部位をはつり等の適当な手法で除去した跡に施工する補修材に使用する他、劣化が起こりつつある部位や起こる虞のある部位の表面に直接上塗りする増厚補強等にも使用できる。また、例えばコンクリート構造物に生じた亀裂箇所の補修・補強用に充填使用することも可能である。また、施工手段は、例えば、鏝やローラー等を用いた塗り付け、噴霧や吹付け装置を用いた吹付け、吐出管等からの流し込み充填で行えるが、例示手段に限定されない。 The mortar composition for repair according to the present invention is used for a repair material to be applied to a mark which has been removed by an appropriate technique such as a hanger, for example, a deterioration part generated in a concrete structure. It can also be used for thickening reinforcement that directly coats the surface of a certain part. In addition, for example, it can be used for filling and repairing cracks in a concrete structure. In addition, the construction means can be performed by, for example, painting using a scissors or a roller, spraying or spraying using a spraying device, or pouring filling from a discharge pipe or the like, but is not limited to the exemplified means.
また、本発明の補修用モルタル組成物は、例えば含有成分が全て粉末や顆粒状のものであれば、これらを例えばヘンシェルやリボン型ミキサーなどで乾式混合して得たプレミックスの補修用モルタル組成物であっても、また全含有成分と混練水を例えばホバート、パン型、噴射型、パドル型、傾胴又は強制２軸型等のミキサーで混練して得た流動状態の補修用モルタル組成物であっても、またさらに補修用モルタル組成物の硬化体でも良く、何れの態様のものも含まれる。 In addition, the repair mortar composition of the present invention is, for example, a premix repair mortar composition obtained by dry-mixing these components using, for example, a Henschel or a ribbon mixer, if the components are all in the form of powder or granules. In addition, the mortar composition for repair in a fluid state obtained by kneading all the ingredients and the kneaded water with a mixer such as a Hobart, pan type, jet type, paddle type, tilting cylinder or forced biaxial type In addition, it may be a cured product of a mortar composition for repair, and includes any form.
以下、実施例により本発明を具体的に詳しく説明するが、本発明はここに表す実施例に限定されるものではない。 EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the examples shown here.
［モルタル組成物の作製］ 気温２０℃、湿度８０％の環境下で、次のＡ〜Ｊで表される材料を用い、表１で表された配合になるよう秤量し、ホバートミキサーで乾式混合した。乾式混合物に表１に表す量の混練水（水道水）を加え、パン型ミキサーで約２分間混練を行った。 [Preparation of mortar composition] Under the environment where the temperature is 20 ° C and the humidity is 80%, the materials represented by the following A to J are weighed so as to have the composition shown in Table 1, and dry-mixed by the Hobart mixer. did. The amount of kneaded water (tap water) shown in Table 1 was added to the dry mixture and kneaded for about 2 minutes with a pan-type mixer.
＜使用材料＞
Ａ；普通ポルトランドセメント（市販品）
Ｂ；メタカオリン（ＳＫＷイーストアジア社製「ＭｅｔａＭａｘＨＲＭ」）
Ｃ１；石灰石粉（最大粒径０．１ｍｍ）
Ｃ２；炭酸カルシウム（最大粒径０．０５ｍｍ）
Ｄ；生石灰系膨張材（太平洋マテリアル社製「エクスパンＫ」）
Ｅ１；細骨材（山形珪砂６・７号）
Ｅ２；細骨材（鹿島珪砂３号）
Ｆ；高性能減水剤（花王社製「マイティ１００」）
Ｇ；セルロース系増粘剤（松本油脂社製「マーポローズ９０ＭＰ−Ｔ」）
Ｈ；消泡剤（市販品；界面活性剤系）
Ｉ１；高炉水砕スラグ微粉（市販品；ブレーン比表面積４０００ｃｍ2／ｇ）
Ｉ２；シリカフューム（市販品；ブレーン比表面積約１０万ｃｍ2／ｇ）
Ｊ；収縮低減剤（太平洋マテリアル社製「テトラガードＰＷ」）
<Materials used>
A: Ordinary Portland cement (commercially available)
B: Metakaolin (“MetaMaxHRM” manufactured by SKW East Asia)
C1: Limestone powder (maximum particle size 0.1 mm)
C2: Calcium carbonate (maximum particle size 0.05mm)
D: Quicklime expanded material ("Expan K" manufactured by Taiheiyo Materials Co., Ltd.)
E1: Fine aggregate (Yamagata Silica Sand No. 6-7)
E2: Fine aggregate (Kashima quartz sand No. 3)
F: High performance water reducing agent ("Mighty 100" manufactured by Kao)
G: Cellulose-based thickener (“Marporose 90MP-T” manufactured by Matsumoto Yushi Co., Ltd.)
H: Antifoaming agent (commercially available product: surfactant system)
I1; ground granulated blast furnace slag (commercial product; Blaine specific surface area 4000 cm 2 / g)
I2: Silica fume (commercially available product: Blaine specific surface area of about 100,000 cm 2 / g)
J: Shrinkage reducing agent ("Tetragard PW" manufactured by Taiheiyo Materials Co., Ltd.)
［モルタル組成物の評価試験］ 前記の通り作製した混練直後のモルタル組成物のフロー値をＪＩＳ Ｒ ５２０１に準拠した方法で測定した。一般に、フロー値が１４０〜１８０ｍｍであると、吹付け施工に適し、鏝による仕上げが可能であり、およそ１８０〜２００ｍｍであると、流し込みによる施工も可能になる。また、同様の流動状態のモルタル組成物の単位容積質量をＪＩＳ Ａ １１７１に準拠した方法で測定した。単位容積質量は、全て２．１０±０．０８となり、何れのモルタル組成物（本発明品１〜１５、比較品１〜７）も大差は見られなかった。 [Evaluation test of mortar composition] The flow value of the mortar composition immediately after kneading prepared as described above was measured by a method based on JIS R5201. Generally, when the flow value is 140 to 180 mm, it is suitable for spraying construction, and finishing with a ridge is possible, and when it is about 180 to 200 mm, construction by pouring is also possible. Moreover, the unit volume mass of the mortar composition of the same fluid state was measured by the method based on JISA1171. The unit volume mass was 2.10 ± 0.08 in all cases, and any mortar composition (Invention product 1-15, Comparative product 1-7) did not show a large difference.
また、温度２０℃湿度６０％の恒温恒湿に保った室内に、３０×３０ｃｍの平坦な面を両面に有し、厚さが５ｃｍのコンクリート製の歩道版を、３０×３０ｃｍの一方の面を上面とし、他方を下面として床に水平に設置した。該コンクリート製歩道版の上面に混練終了後５分以内のモルタル組成物を、塗厚が１０ｍｍとなるよう鏝塗した。次いで、鋼製アタッチメントを用いた建研式接着力試験機で材齢７日と２８日のモルタル組成物のコンクリート製歩道版に対する付着強度を測定し、モルタル組成物のコンクリート躯体に対する密着性の評価試験とした。尚、鏝塗りしたモルタル組成物が接着力試験機での測定中に躯体から剥離したものについては、付着強度を「測定不能」とした。 Also, in a room kept at a constant temperature and humidity of 20 ° C. and humidity of 60%, a 30 × 30 cm flat surface is provided on both sides, and a concrete sidewalk plate with a thickness of 5 cm is attached to one side of 30 × 30 cm. Was placed horizontally on the floor with the other as the bottom and the other as the bottom. A mortar composition within 5 minutes after the completion of kneading was applied on the upper surface of the concrete sidewalk plate so that the coating thickness was 10 mm. Next, the adhesion strength of the mortar composition on the 7th and 28th mortar compositions to the concrete sidewalk plate was measured with a Kenken-type adhesion tester using a steel attachment, and the adhesion of the mortar composition to the concrete frame was evaluated. Tested. The adhesive strength of the mortar composition that had been smeared and peeled off from the casing during measurement with an adhesion tester was “not measurable”.
さらに、前記の通り作製した混練直後のモルタル組成物を、内寸が縦４×横４×長さ１６ｃｍの成形型に流し込み、温度２０℃、湿度８０％の下で２４時間気中養生し、養生後に脱型して供試体を得た。脱型後の供試体は所定の材齢となるまで温度２０℃、湿度８０％の大気中に放置した。材齢７日と２８日の供試体に対し、ＪＩＳ Ｒ ５２０１に準拠した方法で曲げ強度と圧縮強度をそれぞれ測定した。また、材齢７日及び２８日の供試体の脱型直後からの長さ方向の寸法変化を測定し、収縮率（％）も算出した。さらに、強度測定前の材齢２８日の供試体に対しては、目視でひび割れ発生状況を調べた。以上の評価結果を纏めて表２に表す。 Furthermore, the mortar composition immediately after kneading prepared as described above was poured into a mold having an inner dimension of 4 × length 4 × length 16 cm, and cured in air at a temperature of 20 ° C. and a humidity of 80% for 24 hours. After curing, it was demolded to obtain a specimen. The specimen after demolding was left in the atmosphere at a temperature of 20 ° C. and a humidity of 80% until a predetermined age was reached. Bending strength and compressive strength were measured for specimens having a material age of 7 days and 28 days, respectively, by a method based on JIS R 5201. In addition, the dimensional change in the length direction immediately after the demolding of the specimens at 7 and 28 days of age was measured, and the shrinkage rate (%) was also calculated. Further, the occurrence of cracks was visually examined for specimens with a material age of 28 days before strength measurement. The above evaluation results are summarized in Table 2.
表２の結果より、本発明の補修用モルタル組成物は鏝塗施工に適したコンシステンシーである１７０ｍｍ前後の安定したフロー値を呈し、且つポリマーを使用しなくとも高い付着強度と施工後の寸法安定性が得らることがわかる。これに対し従前のスラグ等を使用いて補修材としての耐久性と密着性を具備させたノンポリマータイプのセメントモルタルは低いフロー値しか得られず、施工適用性や作業性における難点が解消できていない結果となった。 From the results in Table 2, the repair mortar composition of the present invention exhibits a stable flow value of around 170 mm, which is a consistency suitable for glazing, and has high adhesion strength and dimensions after construction without using a polymer. It can be seen that stability is obtained. On the other hand, non-polymer type cement mortar using conventional slag, etc., which has durability and adhesion as a repair material, can only obtain a low flow value, and it can solve the difficulty in construction applicability and workability. No results.
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| JP6480672B2 (en) * | 2014-05-15 | 2019-03-13 | 株式会社ケー・エフ・シー | Concrete frame reinforcement method for water supply equipment |
| JP6372886B2 (en) * | 2014-12-27 | 2018-08-15 | 太平洋マテリアル株式会社 | Low whiteness self-leveling composition |
| JP6830817B2 (en) * | 2017-01-05 | 2021-02-17 | デンカ株式会社 | Refractory mortar composition |
| JP7091233B2 (en) * | 2018-11-28 | 2022-06-27 | 株式会社平田工業所 | Construction method of surface temperature lowering concrete, surface temperature lowering concrete panel and surface temperature lowering concrete |
| CN109437756A (en) * | 2018-12-11 | 2019-03-08 | 福建建华建材有限公司 | A kind of prestressed high-strength concrete pile repairing powder and preparation method thereof |
| CN110092625A (en) * | 2019-05-24 | 2019-08-06 | 华南理工大学 | A kind of cement mixed mortar preparing the preparation of calcium carbonate superfine powder powder with alkaline residue |
| JP6819740B1 (en) * | 2019-08-09 | 2021-01-27 | 宇部興産株式会社 | concrete |
| CN110550918A (en) * | 2019-09-12 | 2019-12-10 | 广州迪瑞夫建筑材料有限公司 | Polymer modified repair mortar and construction process |
| JP7321057B2 (en) * | 2019-10-29 | 2023-08-04 | 太平洋マテリアル株式会社 | Polymer cement composition and polymer cement mortar |
| CN113402236A (en) * | 2021-07-30 | 2021-09-17 | 中国十七冶集团有限公司 | Cement concrete pavement repairing material, preparation process and pavement repairing method |
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