JP4516293B2 - Repair mortar - Google Patents
Repair mortar Download PDFInfo
- Publication number
- JP4516293B2 JP4516293B2 JP2003315342A JP2003315342A JP4516293B2 JP 4516293 B2 JP4516293 B2 JP 4516293B2 JP 2003315342 A JP2003315342 A JP 2003315342A JP 2003315342 A JP2003315342 A JP 2003315342A JP 4516293 B2 JP4516293 B2 JP 4516293B2
- Authority
- JP
- Japan
- Prior art keywords
- mass
- parts
- mortar
- cement
- repair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004570 mortar (masonry) Substances 0.000 title claims description 47
- 230000008439 repair process Effects 0.000 title claims description 23
- 239000000463 material Substances 0.000 claims description 35
- 239000000843 powder Substances 0.000 claims description 27
- 229920000642 polymer Polymers 0.000 claims description 25
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 21
- 239000000920 calcium hydroxide Substances 0.000 claims description 21
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 21
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 21
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 20
- 125000004432 carbon atom Chemical group C* 0.000 claims description 18
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- 229910052602 gypsum Inorganic materials 0.000 claims description 18
- 239000010440 gypsum Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000002562 thickening agent Substances 0.000 claims description 11
- 125000005702 oxyalkylene group Chemical group 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 8
- 229910021487 silica fume Inorganic materials 0.000 claims description 7
- 125000002252 acyl group Chemical group 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 125000006353 oxyethylene group Chemical group 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 1
- 239000004568 cement Substances 0.000 description 43
- 239000011083 cement mortar Substances 0.000 description 41
- 238000006386 neutralization reaction Methods 0.000 description 24
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- MUPFEKGTMRGPLJ-ZQSKZDJDSA-N raffinose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO[C@@H]2[C@@H]([C@@H](O)[C@@H](O)[C@@H](CO)O2)O)O1 MUPFEKGTMRGPLJ-ZQSKZDJDSA-N 0.000 description 1
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- HEBKCHPVOIAQTA-ZXFHETKHSA-N ribitol Chemical compound OC[C@H](O)[C@H](O)[C@H](O)CO HEBKCHPVOIAQTA-ZXFHETKHSA-N 0.000 description 1
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- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 150000008163 sugars Chemical class 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Description
本発明は、土木及び建築分野におけるコンクリート構造物の補修・補強工事で使用する補修モルタルに関する。 The present invention relates to a repair mortar used in repair and reinforcement work for a concrete structure in the civil engineering and construction fields.
コンクリート構造物は、塩害、中性化、凍結融解、及び化学的腐食等の作用により劣化が進行し、表面にひび割れや浮き等が発生する恐れがある。その対策として、劣化した部分を打音検査等で確認し、電動ピック、エアピック、ウォータージェット等により取り除き、新たに補修部材で充填し補修する工事が行われている。
修復断面が小さい小規模な補修工事では、ポリマーセメントモルタルを練り混ぜてコテ塗りで断面修復を行う場合が多い（特許文献１及び２参照）。
Concrete structures may deteriorate due to salt damage, neutralization, freezing and thawing, chemical corrosion, and the like, and the surface may be cracked or floated. As countermeasures, a construction is performed in which a deteriorated portion is confirmed by a hammering inspection or the like, removed by an electric pick, an air pick, a water jet, or the like, and newly repaired with a repair member.
In small-scale repair work with a small repair cross section, the polymer cement mortar is often kneaded and the cross section is repaired with a trowel (see Patent Documents 1 and 2).
コテ塗り等で補修する場合には、使用するモルタルの塗り易さや付着性といった施工性に優れた材料が好まれる。そのため、モルタルに適度な粘りや抗ダレ性を付与することを目的に特許文献１〜３に記載されているようにフライアッシュやシリカフューム等の無機微粉末を配合した材料が使用されている。
さらに、「一般式がＸ[O(AO)nR]mで示され、Ｘは２〜８個の水酸基を有する化合物の残基、AOは炭素数２〜１８のオキシアルキレン基、Ｒは水素原子か炭素数１〜１８の炭化水素基又は炭素数２〜１８のアシル基、ｎは３０〜１０００、ｍは２〜８であり、オキシアルキレン基の６０モル％以上はオキシエチレン基であるポリオキシアルキレン誘導体を含有してなる粉体の乾燥収縮低減剤の配合割合が、質量比でセメント：膨張材：乾燥収縮低減剤＝８０〜９８：２〜２０：０．２〜１０であることを特徴とするセメント組成物。」の発明が公知である（特許文献６参照）。 Furthermore, “the general formula is represented by X [O (AO) nR] m, X is a residue of a compound having 2 to 8 hydroxyl groups, AO is an oxyalkylene group having 2 to 18 carbon atoms, and R is a hydrogen atom. Or a hydrocarbon group having 1 to 18 carbon atoms or an acyl group having 2 to 18 carbon atoms, n is 30 to 1000, m is 2 to 8, and 60 mol% or more of the oxyalkylene groups are oxyethylene groups. The blending ratio of the dry shrinkage reducing agent in the powder containing the alkylene derivative is cement: expansion material: dry shrinkage reducing agent = 80 to 98: 2 to 20: 0.2 to 10 by mass ratio. The invention of “a cement composition” is known (see Patent Document 6).
特許文献６の発明においては、特定の配合比を有するセメント、膨張材及び粉体の乾燥収縮低減剤を含有してなるセメント組成物を使用することにより、セメント、モルタル、コンクリ−ト等の硬化体の収縮量は少なく、高い曲げひび割れ強度が得られ、セメント組成物のプレミックス化が可能であるというものであるが、このセメント組成物を補修用モルタルとして使用するものではなく、また、このセメント組成物に、フライアッシュやシリカフューム等の無機微粉末、ポリマーディスパージョンを併用することは示唆されているが、凝結促進剤を含有させることは示唆されていない。 In the invention of Patent Document 6, the cement, mortar, concrete and the like are cured by using a cement composition containing a cement, an expanding material and a powder shrinkage reducing agent having a specific mixing ratio. The amount of shrinkage of the body is small, high bending crack strength is obtained, and the cement composition can be premixed, but this cement composition is not used as a repair mortar, and this Although it is suggested that the cement composition is used in combination with inorganic fine powders such as fly ash and silica fume and a polymer dispersion, it is not suggested to contain a setting accelerator.
上記のようにモルタルの塗り易さや付着性を考慮しフライアッシュやシリカフュームを配合した材料は、セメントに混和すると中性化抵抗性が悪くなるという課題があった。
また、ポリマーセメントモルタルを用いることでポリマーを含有しないモルタルよりは硬化収縮は大幅に低減できるが、十分ではなく数ヶ月でひび割れが発生する場合があり、さらなる硬化収縮低減が望まれていた。
さらに、低温環境下では、効果を発揮する量の硬化収縮低減剤を添加すると凝結が遅延され初期強度発現性が阻害されるといった課題があった。そのため、十分に効果を発揮できる量が使用できない場合があった。
As described above, the material blended with fly ash and silica fume in consideration of ease of application and adhesion of mortar has a problem that the neutralization resistance is deteriorated when mixed with cement.
Further, the use of a polymer cement mortar can significantly reduce the curing shrinkage compared to a mortar not containing a polymer, but it is not sufficient, and cracks may occur in several months, and further reduction of the curing shrinkage has been desired.
Further, in a low temperature environment, there is a problem that when an amount of a curing shrinkage reducing agent that exhibits an effect is added, the setting is delayed and the initial strength development is inhibited. For this reason, there is a case where an amount capable of sufficiently exerting the effect cannot be used.
本発明者は、上記課題を解決するために鋭意検討を重ねた結果、特許文献６に記載された膨張材及び乾燥収縮低減剤を特定の凝結促進剤と併用することにより、無機微粉末を使用しても中性化抵抗性に優れ、硬化収縮量を通常のポリマーセメントモルタルよりも小さくすることができ、さらに、低温環境下においても著しく凝結が遅延しない補修モルタルを完成するに至った。 As a result of intensive studies in order to solve the above problems, the present inventor uses inorganic fine powder by combining the expansion material and the drying shrinkage reducing agent described in Patent Document 6 with a specific setting accelerator. Even so, the present invention has completed a repair mortar that is excellent in neutralization resistance, has a smaller amount of cure shrinkage than ordinary polymer cement mortar, and does not significantly delay the setting even in a low temperature environment.
本発明は、（１）普通ポルトランドセメントであるセメント１００質量部に対して、膨張材２〜１０質量部、一般式がＸ[O(AO)nR]mで示され、Ｘは２〜８個の水酸基を有する化合物の残基、AOは炭素数２〜１８のオキシアルキレン基、Ｒは水素原子、炭素数１〜１８の炭化水素基、又は炭素数２〜１８のアシル基、ｎは３０〜１０００、ｍは２〜８であり、オキシアルキレン基の６０モル％以上はオキシエチレン基であるポリオキシアルキレン誘導体１〜１０質量部、消石灰２〜１０質量部、シリカフュームである無機微粉末１〜２０質量部、ポリマー４〜１５質量部、砂を含有することを特徴とする補修用モルタルである。
（２）繊維類を含有することを特徴とする前記（１）に記載の補修用モルタルである。
（３）流動化剤を含有することを特徴とする前記（１）又は（２）に記載の補修用モルタルである。
（４）増粘剤を含有することを特徴とする前記（１）〜（３）のいずれか一に記載の補修用モルタルである。
（５）カルシウムアルミネートとセッコウの混合物を含有することを特徴とする前記（１）〜（４）のいずれか一に記載の補修用モルタル。
（６）凝結調整剤を含有することを特徴とする前記（５）に記載の補修用モルタルである。
In the present invention, (1) with respect to 100 parts by mass of ordinary Portland cement, 2 to 10 parts by mass of an expansion material, the general formula is represented by X [O (AO) nR] m, and X is 2 to 8 A residue of a compound having a hydroxyl group, AO is an oxyalkylene group having 2 to 18 carbon atoms, R is a hydrogen atom, a hydrocarbon group having 1 to 18 carbon atoms, or an acyl group having 2 to 18 carbon atoms, n is 30 to 30 1000, m is 2 to 8, 60 mol% or more of the oxyalkylene group is 1 to 10 parts by mass of a polyoxyalkylene derivative which is an oxyethylene group, 2 to 10 parts by mass of slaked lime, 1 to 20 inorganic fine powders which are silica fume parts by weight 4 to 15 parts by weight of polymer, Ru repair mortars der characterized by containing sand.
(2 ) The repair mortar according to ( 1) above, which contains fibers.
( 3 ) The repair mortar according to (1) or (2) above, which contains a fluidizing agent.
( 4 ) The repair mortar according to any one of (1) to ( 3 ) above, which contains a thickener.
( 5 ) The repair mortar according to any one of (1) to ( 4 ) above, comprising a mixture of calcium aluminate and gypsum.
( 6 ) The repair mortar according to ( 5 ) above, which contains a setting modifier.
本発明の補修モルタルを用いることで、モルタルの塗り易さや付着性を考慮してシリカフュームを配合しても中性化に対する抵抗性を保つことができ、ポリマーセメントモルタルを用いるよりも、硬化収縮は大幅に低減できるので、ひび割れの発生を低減できる。
また、低温環境下では、効果を発揮する量の硬化収縮低減剤を添加しても凝結が遅延せ
ずに初期強度発現性が得られる。
By using repair mortars of the present invention, be blended sheet Rikafuyumu considering the coating easiness and adhesion of the mortar can keep resistance to neutralization, than with polymer cement mortar, curing shrinkage Can greatly reduce the occurrence of cracks.
In addition, in a low temperature environment, even if an amount of a curing shrinkage reducing agent that exhibits an effect is added, the initial strength developability can be obtained without delaying the setting.
以下、本発明を詳細に説明する。
本発明で使用するセメントとしては、JIS R 5210に規定されている普通ポルトランドセメントを使用する。
Hereinafter, the present invention will be described in detail.
As the cement used in the present invention, ordinary Portland cement specified in J IS R 5210 is used .
本発明で使用する膨張材は、モルタルの乾燥ひび割れを低減するために使用されるもので特に限定されるものではないが、アウイン系、カルシウムアルミノフェライト系、石灰系等のものが挙げられる。
膨張材の使用量は、通常、セメント１００質量部に対して、２〜１０質量部が好ましく、４〜８質量部がより好ましい。２質量部未満ではモルタルのひび割れ防止が充分できない場合があり、１０質量部を超えて配合してもその効果の向上が期待できない場合がある。
The expansion material used in the present invention is not particularly limited and is used for reducing dry cracking of mortar, but examples thereof include Auin, calcium aluminoferrite, and lime.
The amount of the expansion material used is usually preferably 2 to 10 parts by mass and more preferably 4 to 8 parts by mass with respect to 100 parts by mass of cement. If it is less than 2 parts by mass, cracking of the mortar may not be sufficiently prevented, and even if it exceeds 10 parts by mass, the improvement of the effect may not be expected.
本発明で使用するポリオキシアルキレン誘導体は、一般式がＸ[O(AO)nR]mで示され、Ｘは２〜８個の水酸基を有する化合物の残基、AOは炭素数２〜１８のオキシアルキレン基、Ｒは水素原子か炭素数１〜１８の炭化水素基又は炭素数２〜１８のアシル基、ｎは３０〜１０００、ｍは２〜８であり、オキシアルキレン基の６０モル％以上はオキシエチレン基であるポリオキシアルキレン誘導体からなる。
ｎの値が３０未満であると融点が低くなり粉体で使用することが難しくなり、ｎの値が１０００を超えると粘度が高くなり製造が難しくなる。
オキシエチレン基が６０モル％未満であると融点が低くなり粉体で使用することが難しくなり、セメント溶液中での溶解性が悪くなる。
The polyoxyalkylene derivative used in the present invention has a general formula represented by X [O (AO) nR] m, X is a residue of a compound having 2 to 8 hydroxyl groups, and AO has 2 to 18 carbon atoms. An oxyalkylene group, R is a hydrogen atom, a hydrocarbon group having 1 to 18 carbon atoms, or an acyl group having 2 to 18 carbon atoms, n is 30 to 1000, m is 2 to 8, and 60 mol% or more of the oxyalkylene group Consists of a polyoxyalkylene derivative which is an oxyethylene group.
When the value of n is less than 30, the melting point becomes low and it becomes difficult to use it in powder form. When the value of n exceeds 1000, the viscosity becomes high and the production becomes difficult.
If the oxyethylene group is less than 60 mol%, the melting point becomes low, making it difficult to use in powder form, and the solubility in the cement solution becomes poor.
一般式Ｘ[O(AO)nR]mにおいて、Ｘは２〜８個の水酸基を有する化合物の残基であるが、水酸基を２〜８個有する化合物としては、エチレングリコール、プロピレングリコール、ブチレングリコール、ヘキシレングリコール、スチレングリコール、炭素数８〜１８のアルキレングリコール、ネオペンチルグリコール等のグリコール類、グリセリン、ジグリセリン、ポリグリセリン、トリメチロールエタン、トリメチロールプロパン、１，３，５−ペンタントリオール、エリスリトール、ペンタエリスリトール、ジペンタエリスリトール、ソルビトール、ソルビタン、ソルバイド、ソルビトールとグリセリンの縮合物、アドニトール、アラビトール、キシリトール、マンニトール、等の多価アルコール類、あるいはそれらの部分エーテル化物、又はエステル化物、キシロース、アラビノース、リボース、ラムノース、グリコース、フルクトース、ガラクトース、マンノース、ソルボース、セロビオース、マルトース、イソマルトース、トレハロース、シュークロース、ラフィノース、ゲンチアノース、メレジトース等の糖類、あるいはそれらの部分エーテル化物又はエステル化物等が挙げられる。 In the general formula X [O (AO) nR] m, X is a residue of a compound having 2 to 8 hydroxyl groups. Examples of the compound having 2 to 8 hydroxyl groups include ethylene glycol, propylene glycol, butylene glycol. , Hexylene glycol, styrene glycol, alkylene glycols having 8 to 18 carbon atoms, glycols such as neopentyl glycol, glycerin, diglycerin, polyglycerin, trimethylolethane, trimethylolpropane, 1,3,5-pentanetriol, Erythritol, pentaerythritol, dipentaerythritol, sorbitol, sorbitan, sorbide, condensates of sorbitol and glycerin, polyhydric alcohols such as adonitol, arabitol, xylitol, mannitol, or partially etherified products thereof, or ester Steroids, xylose, arabinose, ribose, rhamnose, frucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, sucrose, raffinose, gentianose, merezitose, etc., or partially etherified products or esters thereof And the like.
一般式Ｘ[O(AO)nR]mにおいて、AOで示される炭素数２〜１８のオキシアルキレン基はエチレンオキシド、プロピレンオキシド、ブチレンオキシド、テトラヒドロフラン、炭素数６〜１８のα−オレフィンオキシド等に由来するもので、オキシエチレン基、オキシプロピレン基、オキシブチレン基、オキシテトラメチレン基、炭素数６〜１８のオキシアルキレン基等があり、２種以上が付加しているときは、ブロック状付加でもランダム状付加でもよい。 In the general formula X [O (AO) nR] m, the oxyalkylene group having 2 to 18 carbon atoms represented by AO is derived from ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, α-olefin oxide having 6 to 18 carbon atoms, and the like. When there are oxyethylene groups, oxypropylene groups, oxybutylene groups, oxytetramethylene groups, oxyalkylene groups having 6 to 18 carbon atoms, etc., and two or more types are added, random addition is possible even with block addition It may be added.
上記一般式において、Rで示される炭素数１〜１８の炭化水素基としては、メチル基、エチル基、アリル基、プロピル基、イソプロピル基、ブチル基、イソブチル基、第三ブチル基、アミル基、イソアミル基、ヘキシル基、ヘプチル基、オクチル基、２−エチルヘキシル基、ノニル基、デシル基、ウンデシル基、ドデシル基、イソトリデシル基、テトラデシル基、ヘキサデシル基、イソセチル基、オクタデシル基、イソステアリル基、オレイル基、ベンジル基、クレジル基、ブチルフェニル基、ジブチルフェニル基、オクチルフェニル基、ノニルフェニル基、ドデシルフェニル基、スチレン化フェニル基等が挙げられる。 In the above general formula, as the hydrocarbon group having 1 to 18 carbon atoms represented by R, methyl group, ethyl group, allyl group, propyl group, isopropyl group, butyl group, isobutyl group, tertiary butyl group, amyl group, Isoamyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, isotridecyl, tetradecyl, hexadecyl, isocetyl, octadecyl, isostearyl, oleyl Benzyl group, cresyl group, butylphenyl group, dibutylphenyl group, octylphenyl group, nonylphenyl group, dodecylphenyl group, styrenated phenyl group and the like.
また、同じくRで示される炭素数２〜１８のアシル基としては、酢酸、プロピオン酸、酪酸、イソ酪酸、カプロン酸、カプリル酸、２−エチルヘキサン酸、ペラルゴン酸、カプリン酸、ラウリン酸、ミリスチン酸、パルミチン酸、イソパルミチン酸、マーガリン酸、ステアリン酸、イソステアリン酸、アクリル酸、メタクリル酸、パルミトレイン酸、オレイン酸、リノール酸、リノレン酸、安息香酸等に由来するアシル基が挙げられる。 Similarly, as the acyl group having 2 to 18 carbon atoms represented by R, acetic acid, propionic acid, butyric acid, isobutyric acid, caproic acid, caprylic acid, 2-ethylhexanoic acid, pelargonic acid, capric acid, lauric acid, myristic Examples include acyl groups derived from acids, palmitic acid, isopalmitic acid, margaric acid, stearic acid, isostearic acid, acrylic acid, methacrylic acid, palmitoleic acid, oleic acid, linoleic acid, linolenic acid, benzoic acid and the like.
ポリオキシアルキレン誘導体の使用量は、セメント１００質量部に対して１〜１０質量部が好ましく、４〜８質量部がより好ましい。１質量部未満では収縮低減効果が得られず、１０質量部を超えると強度発現が阻害される場合がある。 1-10 mass parts is preferable with respect to 100 mass parts of cement, and, as for the usage-amount of a polyoxyalkylene derivative, 4-8 mass parts is more preferable. If it is less than 1 part by mass, the effect of reducing shrinkage cannot be obtained, and if it exceeds 10 parts by mass, the strength expression may be inhibited.
本発明で使用する消石灰は、中性化抵抗性の向上と凝結促進効果を付与するものである。消石灰の種類としては、特に限定されるものではなく、一般に市販されているものが使用できる。
本発明の消石灰の使用量は、セメント１００質量部に対して２〜１０質量部であり、２〜８質量部が好ましい。２質量部未満では、中性化抵抗性の向上や凝結の促進効果が期待できないおそれがあり、１０質量部を越えると長期強度発現性が阻害されるおそれがある。
The slaked lime used in the present invention imparts an improvement in neutralization resistance and a setting acceleration effect. The type of slaked lime is not particularly limited, and commercially available products can be used.
The amount of slaked lime of the present invention is 2 to 10 wt parts to 100 parts by weight of cement, are good preferable 2-8 weight parts. If the amount is less than 2 parts by mass, the neutralization resistance may not be improved and the effect of promoting the aggregation may not be expected. If the amount exceeds 10 parts by mass, the long-term strength development may be inhibited.
本発明で使用するシリカフュームである無機微粉末は、セメントに混合するとコテ塗り性や抗ダレ性を付与するものである。
本発明の無機微粉末の使用量は、セメント１００質量部に対して１〜２０質量部であり、２〜２０質量部が好ましい。１質量部未満ではコテ塗り性や抗ダレ性の向上の効果が現われないおそれがあり、２０質量部を超えると中性化を抑制できなくなるおそれがある。
Inorganic fine powder which is a silica fume used in the present invention, Ru der those which confer troweled resistance and anti-sag properties when mixed into cement.
The amount of the inorganic fine powder of the present invention is 1 to 20 parts by mass with respect to 100 parts by mass of cement, virtuous preferable 2-20 parts by weight. If the amount is less than 1 part by mass, the effect of improving the coatability and the anti-sagging property may not appear, and if it exceeds 20 parts by mass, neutralization may not be suppressed.
本発明で使用するポリマーは、特に限定されるものではないが、アクリロニトリル・ブタジエンゴム、スチレン・ブタジエンゴム、クロロプレンゴム、天然ゴム等のゴムラテックスや、エチレン・酢酸ビニル共重合体、ポリアクリル酸エステル、スチレン・アクリル酸エステル共重合体やアクリロニトリル・アクリル酸エステルに代表されるアクリル酸エステル系共重合体、酢酸ビニルビニルバーサテート系共重合体等の樹脂エマルジョン等が挙げられる。ポリマーの形態としては、再乳化型粉末タイプや液体タイプがあり、下地部分との付着性改善、更にモルタルの耐久性向上のために使用される。
ポリマーの使用量は、セメント１００質量部に対して、固形分量で４〜１５質量部であり、４〜１０質量部が好ましい。４質量部未満では、中性化抵抗性や付着強度の改善ができない場合があり、１５質量部を超えて配合してもその効果の向上が期待できない場合がある。
ポリマーの混合方法は、特に限定されるものではないが、例えば、予めセメントや水に分散しておくことが好ましい。
The polymer used in the present invention is not particularly limited, but rubber latex such as acrylonitrile / butadiene rubber, styrene / butadiene rubber, chloroprene rubber, natural rubber, ethylene / vinyl acetate copolymer, polyacrylic ester, etc. Examples thereof include resin emulsions such as styrene / acrylic acid ester copolymers, acrylic acid ester copolymers represented by acrylonitrile / acrylic acid esters, and vinyl acetate vinyl versatate copolymers. As the polymer form, there are a re-emulsification type powder type and a liquid type, which are used for improving adhesion to the base portion and further improving the durability of the mortar.
The amount of polymer relative to the cement 100 parts by weight, a 4-15 parts by weight in solid content, is favorable preferable 4-10 parts by weight. If the amount is less than 4 parts by mass, the neutralization resistance and adhesion strength may not be improved, and even if the amount exceeds 15 parts by mass, the improvement of the effect may not be expected.
The method of mixing the polymer is not particularly limited, but it is preferable to disperse the polymer in cement or water in advance.
本発明で使用する砂は、特に限定されるものではないが、川砂、海砂、砕砂、軽量砂が使用できる。これらの併用も可能である。
本発明の砂は予めセメントと混合しておいてもよく、現場で混合してもよい。予めセメントと混合しておく場合は、骨材を乾燥させた乾燥骨材を使用すればよい。
本発明の骨材の使用量は、セメント１００質量部に対して、１００〜２５０質量部が好ましい。１００質量部未満では塗り付けたときにダレが発生する場合があり、２５０質量部を超えると表面の仕上がり状態が悪くなるおそれがある。
The sand used in the present invention is not particularly limited, but river sand, sea sand, crushed sand, and lightweight sand can be used. These combinations can also be used.
The sand of the present invention may be mixed with cement in advance or may be mixed on site. When previously mixed with cement, a dry aggregate obtained by drying the aggregate may be used.
As for the usage-amount of the aggregate of this invention, 100-250 mass parts is preferable with respect to 100 mass parts of cement. If it is less than 100 parts by mass, sagging may occur when it is applied, and if it exceeds 250 parts by mass, the surface finish may be deteriorated.
本発明で使用する繊維類は、ひび割れ抵抗性や曲げ耐力を向上させるものである。繊維の種類としては、ビニロン繊維やプロピレン繊維に代表される高分子繊維類、鋼繊維、ガラス繊維、及び炭素繊維に代表される無機繊維類が挙げられ、特に限定されるものではない。
繊維の使用量は、セメントモルタル全体に対して０．０５〜０．７質量部が好ましく、０．０８〜０．５質量部がより好ましい。０．０５質量部未満では曲げ耐力を向上させる効果が発揮されない場合があり、０．７質量部を超えるとモルタルの流動性に悪影響を与える場合がある。繊維の長さはコテ仕上げ面の美観の点で１５ｍｍ以下が好ましい。
The fibers used in the present invention improve crack resistance and bending strength. Examples of the types of fibers include polymer fibers typified by vinylon fibers and propylene fibers, steel fibers, glass fibers, and inorganic fibers typified by carbon fibers, and are not particularly limited.
The amount of fiber used is preferably 0.05 to 0.7 parts by mass, more preferably 0.08 to 0.5 parts by mass with respect to the entire cement mortar. If it is less than 0.05 part by mass, the effect of improving the bending strength may not be exhibited. If it exceeds 0.7 part by mass, the mortar fluidity may be adversely affected. The length of the fiber is preferably 15 mm or less in view of the beauty of the iron finish surface.
本発明で使用する流動化剤は、特に限定されるものではないが、メラミン系、ナフタレン系、リグニン系、ポリカルボン酸系のものが挙げられ、モルタルの流動性の調整に使用される。流動化剤の使用量は、セメント１００質量部に対して、０．０１〜０．５質量部が好ましく、０．０２〜０．３質量部がより好ましい。０．０１質量部未満では、流動性を改善する効果が発揮されない場合があり、０．５質量部を越えると、流動性が良すぎて塗り付けたときにダレるおそれがある。
本発明の流動化剤の混合方法は特に限定されるものではないが、例えば、あらかじめセメントに、また、セメントや水に分散しておくことが好ましい。
The fluidizing agent used in the present invention is not particularly limited, and examples thereof include melamine-based, naphthalene-based, lignin-based, and polycarboxylic acid-based agents, and are used for adjusting the fluidity of mortar. 0.01-0.5 mass part is preferable with respect to 100 mass parts of cement, and, as for the usage-amount of a fluidizing agent, 0.02-0.3 mass part is more preferable. If the amount is less than 0.01 parts by mass, the effect of improving the fluidity may not be exhibited. If the amount exceeds 0.5 parts by mass, the fluidity is too good, and there is a risk of sagging when applied.
The mixing method of the fluidizing agent of the present invention is not particularly limited. For example, it is preferable that the fluidizing agent is previously dispersed in cement, cement or water.
本発明で使用する増粘剤は、モルタルの粘度を調整するものであり、特に限定されるものではないが、一般に水溶性高分子物質と呼ばれているもので、メチルセルロース、カルボキシメチルセルロース、グアーガム、ポリビニルアルコール、ポリアクリル酸やそのナトリウム塩やカリウム塩、及びポリエチレンオキサイドなどが挙げられ、モルタルの粘性を調整するために使用される。
増粘剤の使用量は、通常、セメント１００質量部に対して、０．０１〜０．５質量部であり、０．０５〜０．３質量部がより好ましい。０．０１質量部未満では粘性を向上させる効果がなく、０．５質量部を超えると空気を巻き込み単位容積質量が小さくなりすぎる場合がある。
The thickener used in the present invention adjusts the viscosity of the mortar and is not particularly limited, but is generally called a water-soluble polymer substance, such as methylcellulose, carboxymethylcellulose, guar gum, Polyvinyl alcohol, polyacrylic acid, its sodium salt and potassium salt, polyethylene oxide, etc. are mentioned and used for adjusting the viscosity of mortar.
The usage-amount of a thickener is 0.01-0.5 mass part normally with respect to 100 mass parts of cement, and 0.05-0.3 mass part is more preferable. If the amount is less than 0.01 parts by mass, the effect of improving the viscosity is not obtained. If the amount exceeds 0.5 parts by mass, air may be involved and the unit volume mass may be too small.
本発明で使用するカルシウムアルミネートとセッコウの混合物は、セメントモルタルに急硬性を付与するものであり、ＣaＯ原料やＡｌ2Ｏ3原料を等を混合したものをキルンで焼成したり、電気炉等で溶融したり等の熱処理をして得られるものであり、ＣａＯとして２８〜５５％、Ａｌ2Ｏ3として４５〜７２％の範囲内にあるカルシウムアルミネートである。例えば、カルシウムアルミネートの鉱物成分としては、ＣaＯをＣ、Ａｌ2Ｏ3をＡとすると、Ｃ３Ａ、Ｃ１２Ａ７、ＣＡ、及びＣＡ２等で示されるカルシウムアルミネート熱処理物を粉砕したもの等が挙げられ、これらの１種又は２種以上を併用してもよい。さらに、その他の鉱物成分として、ナトリウム、カリウム、及びリチウム等のアルカリ金属塩が一部固溶したカルシウムアルミネート等が挙げられる。これらの中では、反応活性の点で非晶質のカルシウムアルミネートが好ましい。また、ＳｉＯ2を含有するアルミノケイ酸カルシウム、Ｃ１２Ａ７の１つのＣａＯをＣａＦ2等のハロゲン化物で置き換えたＣ１１Ａ７・ＣａＸ（Ｘはフッ素等のハロゲン）も使用できる。カルシウムアルミネートの粒度はブレーン値で３０００ｃｍ2／ｇ以上が好ましい。３０００ｃｍ2／ｇ未満だと急硬性が低下するおそれがある。
本発明で使用するセッコウは、強度発現性を向上させるものである。セッコウとしては、無水セッコウ、半水セッコウ、及びニ水セッコウなどが挙げられ、これらの１種又は２種以上を併用することができる。これらの中では、強度発現性の点で無水セッコウの使用が好ましい。
セッコウの使用量はカルシウムアルミネート１００質量部に対して、２０〜３００質量部が好ましく５０〜２００質量部がより好ましい。２０質量部未満だと強度発現性を改善できないおそれがあり、３００質量部を超えると初期強度発現性が悪くなるおそれがある。
本発明のカルシウムアルミネートとセッコウの混合物の使用量は、セメント１００質量部に対して、３〜３０質量部が好ましく、５〜２０質量部がより好ましい。３質量部未満では、急硬性を付与することが難しく、３０質量部を超えると長期的に膨張破壊を起こす可能性がある。
The mixture of calcium aluminate and gypsum used in the present invention imparts rapid hardening to cement mortar, and a mixture of CaO raw material, Al 2 O 3 raw material, etc. is baked in a kiln, an electric furnace, etc. in are those obtained by the heat treatment such or melt, from 28 to 55% as CaO, calcium aluminate is in the range of 45 to 72% as Al 2 O 3. For example, as a mineral component of calcium aluminate, when CaO is C and Al 2 O 3 is A, those obtained by pulverizing a calcium aluminate heat treated product represented by C3A, C12A7, CA, CA2, etc. One or two or more of these may be used in combination. Furthermore, other mineral components include calcium aluminate in which alkali metal salts such as sodium, potassium and lithium are partly dissolved. Among these, amorphous calcium aluminate is preferable in terms of reaction activity. Further, calcium aluminosilicate containing SiO 2, (the X halogen such as fluorine) C11A7 · CaX by replacing one CaO of C12A7 halide such as CaF 2 can be used. The particle size of the calcium aluminate is preferably 3000 cm 2 / g or more in terms of a brain value. If it is less than 3000 cm 2 / g, the rapid hardening property may be lowered.
The gypsum used in the present invention improves strength development. Examples of gypsum include anhydrous gypsum, semi-water gypsum, and dihydrate gypsum, and one or more of these can be used in combination. Among these, anhydrous gypsum is preferable in terms of strength development.
The amount of gypsum used is preferably 20 to 300 parts by mass and more preferably 50 to 200 parts by mass with respect to 100 parts by mass of calcium aluminate. If it is less than 20 parts by mass, the strength development may not be improved, and if it exceeds 300 parts by mass, the initial strength development may be deteriorated.
3-30 mass parts is preferable with respect to 100 mass parts of cement, and, as for the usage-amount of the mixture of the calcium aluminate and gypsum of this invention, 5-20 mass parts is more preferable. If it is less than 3 parts by mass, it is difficult to impart rapid hardening, and if it exceeds 30 parts by mass, there is a possibility of causing expansion and destruction in the long term.
本発明の凝結調整剤は、カルシウムアルミネートとセッコウの混合物を使用した場合の可使時間をコントロールする目的で使用する。凝結調整剤の種類としては、クエン酸、酒石酸、グルコン酸、リンゴ酸等のオキシカルボン酸類とこれらの金属塩類、トリポリリン酸塩、第一リン酸ナトリウム等のリン酸塩、蔗糖、果糖等の糖類、ホウ酸ナトリウム等のホウ酸塩、ケイフッ化マグネシウム等のケイフッ化物等が挙げられる。これらの１種又は２種以上の併用も可能である。
また、これらの凝結調整剤に炭酸塩、硫酸塩、硝酸塩、亜硝酸塩等を組み合わせたものを使用することも可能である。
本発明の凝結調整剤の使用量は、セメント１００質量部に対して０．０５〜２質量部が好ましく、０．１〜１質量部がより好ましい。０．０５質量部未満では、凝結を遅延させることが難しく、２質量部を超えると強度発現性を阻害するおそれがある。
The setting regulator of the present invention is used for the purpose of controlling the pot life when a mixture of calcium aluminate and gypsum is used. The types of setting regulators include oxycarboxylic acids such as citric acid, tartaric acid, gluconic acid and malic acid and their metal salts, phosphates such as tripolyphosphate and sodium monophosphate, and sugars such as sucrose and fructose. , Borate salts such as sodium borate, silicofluoride such as magnesium silicofluoride, and the like. These 1 type, or 2 or more types combined use is also possible.
Moreover, it is also possible to use what combined carbonate, a sulfate, nitrate, nitrite etc. with these setting regulators.
0.05-2 mass parts is preferable with respect to 100 mass parts of cement, and, as for the usage-amount of the setting regulator of this invention, 0.1-1 mass part is more preferable. If it is less than 0.05 part by mass, it is difficult to delay the setting, and if it exceeds 2 parts by mass, the strength development may be inhibited.
本発明では、必要に応じ、減水剤、AE減水剤、高性能AE減水剤、AE剤、消泡剤、防錆剤、撥水剤、抗菌剤等の各種セメント混和剤を併用することが可能である。 In the present invention, various cement admixtures such as a water reducing agent, an AE water reducing agent, a high performance AE water reducing agent, an AE agent, an antifoaming agent, a rust preventive, a water repellent, and an antibacterial agent can be used in combination. It is.
本発明の補修モルタルと混合する水量は、セメント１００質量部に対して、３０〜６０質量部が好ましく、３５〜５０質量部がより好ましい。３０質量部未満ではモルタルの流動性が低下する場合があり、６０質量部を超えると強度発現性が低下する場合がある。
以下、実施例に基づき詳細に説明する。
30-60 mass parts is preferable with respect to 100 mass parts of cement, and, as for the amount of water mixed with the repair mortar of this invention, 35-50 mass parts is more preferable. If the amount is less than 30 parts by mass, the fluidity of the mortar may be reduced. If the amount exceeds 60 parts by mass, the strength development may be reduced.
Hereinafter, it demonstrates in detail based on an Example.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及びポリオキシアルキレン誘導体を表に示すように加えた（質量部、以下同じ）ドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、所定材齢での長さ変化と圧縮強度を測定した。結果を表１に示す。
（使用材料）
セメント：普通ポルトランドセメント 市販品
骨材 ：新潟県青海町産石灰砂乾燥品 最大粒径１．２ｍｍ
膨張材 ：カルシウムサルホアルミネート系膨張材 市販品
ポリオキシアルキレン誘導体：ＨＯ−（ＣＨ2ＣＨ2Ｏ）189−Ｈ 市販品
消石灰 ：市販品
無機微粉末：シリカフューム 市販品
ポリマー ：アクリル−酢酸ビニル−バーサチック酸ビニル系共重合体 市販品
（試験方法）
長さ変化率：JHS-416に準拠した。測定材齢は２８日。
圧縮強度 ：JIS R 5201に準拠した。測定材齢は２８日。
200 parts by mass of aggregate, 6 parts by mass of expansion material, 2 parts by mass of slaked lime, 6 parts by mass of inorganic fine powder, 7 parts by mass of polymer, and polyoxyalkylene derivative were added to 100 parts by mass of cement as shown in the table. (Mass parts, the same applies hereinafter) Dry cement mortar was prepared. 42 parts by mass of water was added to this dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar, and the length change and compressive strength at a predetermined age were measured. The results are shown in Table 1.
(Materials used)
Cement: Ordinary Portland cement Commercial products Aggregate: Dry lime sand from Aomi-cho, Niigata Prefecture Maximum particle size 1.2mm
Expansive: calcium sulfoaluminate based expansive commercially polyoxyalkylene derivative: HO- (CH 2 CH 2 O ) 189 -H commercially slaked lime: commercially inorganic fine powder: silica fume commercially Polymer: Acrylic - vinyl acetate - vinyl versatate Vinyl acid-based copolymer, commercial product (test method)
Length change rate: Conforms to JHS-416. Measurement material age is 28 days.
Compressive strength: Conforms to JIS R 5201. Measurement material age is 28 days.
表１によれば、ポリオキシアルキレン誘導体１〜１０質量部を膨張材と併用することにより、長さ変化率が小さくなり、収縮低減効果を奏するのがわかる。特に、ポリオキシアルキレン誘導体を４〜８質量部にすると、長さ変化率が極めて小さくなると共に、高い圧縮強度が維持されるものである。 According to Table 1, it can be seen that, when 1 to 10 parts by mass of the polyoxyalkylene derivative is used in combination with the expansion material, the rate of change in length is reduced, and the shrinkage reduction effect is exhibited. In particular, when the polyoxyalkylene derivative is used in an amount of 4 to 8 parts by mass, the rate of change in length is extremely small and high compressive strength is maintained.
セメント１００質量部に対して、骨材２００質量部、ポリオキシアルキレン誘導体を４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及び膨張材を表に示すように、加えたドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、所定材齢での長さ変化と圧縮強度を測定した。結果を表２に示す。 As shown in the table, with respect to 100 parts by mass of cement, 200 parts by mass of aggregate, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of fine inorganic powder, 7 parts by mass of polymer, and expansion material The added dry cement mortar was adjusted. 42 parts by mass of water was added to this dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar, and the length change and compressive strength at a predetermined age were measured. The results are shown in Table 2.
表２によれば、膨張材２〜１０質量部をポリオキシアルキレン誘導体と併用することにより、長さ変化率が小さくなり、収縮低減効果を奏するのがわかる。特に、膨張材を４〜８質量部にすると、長さ変化率が極めて小さくなると共に、圧縮強度も高くなるものである。 According to Table 2, it can be seen that, when 2 to 10 parts by mass of the expansion material is used in combination with the polyoxyalkylene derivative, the length change rate is reduced, and the shrinkage reduction effect is exhibited. In particular, when the expansion material is 4 to 8 parts by mass, the rate of change in length is extremely small and the compressive strength is also high.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、無機微粉末６質量部、ポリマー７質量部、及び消石灰を表に示すように加えたドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、圧縮強度、凝結性状中性化深さを測定した。結果を表３に示す。
（試験方法）
凝結性状 ：JSCE-D 102に準拠し始発時間を測定した。
中性化深さ：JIS A 1171に準拠した。
As shown in the table, 200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 6 parts by mass of inorganic fine powder, 7 parts by mass of polymer, and slaked lime were added to 100 parts by mass of cement. A dry cement mortar was prepared. 42 parts by mass of water was added to the dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar, and the compressive strength and the neutralization depth of the setting property were measured. The results are shown in Table 3.
(Test method)
Condensation property: First start time was measured according to JSCE-D102.
Neutralization depth: Conforms to JIS A 1171.
表３によれば、消石灰２〜１０質量部を加えることにより、始発時間が短くなり、中性化深さも浅くなって、凝結促進効果が付与され、中性化抵抗性が向上しているのがわかる。特に、消石灰を２〜８質量部にすると、始発時間が短くなり、中性化深さも浅くなると共に高い圧縮強度が維持されるものである。 According to Table 3, by adding 2 to 10 parts by mass of slaked lime, the initial time is shortened, the neutralization depth is also shallow, a congealing promoting effect is imparted, and the neutralization resistance is improved. I understand. In particular, when the amount of slaked lime is 2 to 8 parts by mass, the initial time is shortened, the neutralization depth is reduced, and high compressive strength is maintained.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、ポリマー７質量部、及び無機微粉末を表に示すように加えたドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、抗ダレ性、中性化深さを測定した。結果を表４に示す。
（試験方法）
抗ダレ性：コンクリート板（横３０ｃｍ×縦３０ｃｍ×厚さ６ｃｍ）を垂直に立てかけ、
厚さ２ｃｍとなるように木枠をコンクリート板に設ける。練り混ぜたモルタ
ルをその木枠内に塗り付けて表面のコテ仕上げを行い、直ちに木枠を取り外
したときの塗り付けたモルタルのダレやすさを観察した。木枠を取り外しモ
ルタルがダレてはらみが発生したり、剥がれ落ちたりしたら×、そうでなけ
れば○とした。
200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 7 parts by mass of polymer, and inorganic fine powder were added to 100 parts by mass of cement as shown in the table. A dry cement mortar was prepared. 42 parts by mass of water was added to the dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar, and the anti-sag and neutralization depths were measured. The results are shown in Table 4.
(Test method)
Anti-sagging: A concrete board (30cm wide x 30cm long x 6cm thick) leans vertically,
A wooden frame is provided on the concrete plate so as to have a thickness of 2 cm. Kneaded morta
Paint the inside of the wooden frame to finish the surface and remove the wooden frame immediately.
When the mortar was applied, the ease of dripping was observed. Remove the wooden frame
If the rutar is dripping and peeling occurs or peels off, x, otherwise
It was marked as ○.
表４によれば、無機微粉末１〜２０質量部を加えることにより、抗ダレ性が向上すると
共に、中性化深さも浅いままに維持され、中性化が抑制されているのがわかる。
According to Table 4, the addition of inorganic fine powder 1-20 mass unit, as well as improved anti-sag property, neutralization depth also remain shallow, it can be seen that the neutralization is suppressed .
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、及びポリマーを表に示すように加えたドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、中性化深さと付着強度を測定した。結果を表５に示す。
（試験方法）
付着強度：横３０×縦３０×厚さ６ｃｍのサンドブラストしたコンクリート板にプライ
マー（エチレン−酢酸ビニル系エマルジョン）を１５０ｇ／ｍ２となるよう
に刷毛で塗り、補修モルタルを２ｃｍ厚みとなるように塗り付け、表面のコ テ仕上げを行い試験体とした。
材齢２８日後にコアリングにより下地コンクリート部まで削孔し、専用の引
抜き治具を取り付け建研式付着力試験機で測定した。試験体の養生は温度２
０℃、湿度６０％、削孔径は５５ｍｍとした。
200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of inorganic fine powder, and polymer were added to 100 parts by mass of cement as shown in the table. A dry cement mortar was prepared. 42 parts by mass of water was added to this dry cement mortar and kneaded with a mortar mixer to obtain cement mortar, and the neutralization depth and adhesion strength were measured. The results are shown in Table 5.
(Test method)
Adhesion strength: Ply on concrete blasted concrete plate 30 × 30 × 6cm thick
Mer (ethylene-vinyl acetate emulsion) to be 150 g / m 2
The surface was coated with a brush and the repair mortar was applied to a thickness of 2 cm.
After 28 days of age, drilling to the ground concrete part by coring and dedicated drawing
A punching jig was attached and measured with a Kenken type adhesion tester. Temperature of test specimen is 2
The temperature was 0 ° C., the humidity was 60%, and the hole diameter was 55 mm.
表５によれば、ポリマー４〜１５質量部を加えることにより、付着強度が向上し、中性化深さも浅くなり、中性化抵抗性が向上しているのがわかる。特に、ポリマーを４〜１０質量部にすると、付着強度、中性化抵抗性の向上が顕著になるものである。 According to Table 5, it can be seen that by adding 4 to 15 parts by mass of the polymer, the adhesion strength is improved, the neutralization depth is also reduced, and the neutralization resistance is improved. In particular, when the polymer is 4 to 10 parts by mass, the adhesion strength and the neutralization resistance are significantly improved.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及び繊維を表に示すように加えたドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、フローと曲げタフネスを測定した。結果を表６に示す。
（使用材料）
繊維：ビニロン繊維 繊維長さ６ｍｍ 繊維径０．０２６ｍｍ 収束タイプ 市販品
（試験方法）
フロー：JIS R 5201
曲げタフネス：ＪＳＣＥ Ｇ ５５２に準拠した。養生方法は温度２０℃、湿度６０％
の部屋で気中養生した。測定材齢は２８日とした。
Table: 200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of fine inorganic powder, 7 parts by mass of polymer, and fiber with respect to 100 parts by mass of cement Added dry cement mortar was prepared as indicated. 42 parts by mass of water was added to this dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar, and the flow and bending toughness were measured. The results are shown in Table 6.
(Materials used)
Fiber: Vinylon fiber Fiber length 6mm Fiber diameter 0.026mm Convergence type Commercially available product (test method)
Flow: JIS R 5201
Bending toughness: Conforms to JSCE G552. Curing method is temperature 20 ℃, humidity 60%
I was cured in the room. The measurement material age was 28 days.
表６によれば、繊維類０．０５〜０．７質量部を加えることにより、曲げタフネスが向上しているのがわかる。 According to Table 6, it can be seen that the bending toughness is improved by adding 0.05 to 0.7 parts by mass of fibers.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及び流動化剤を表に示すように加えたドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、フローを測定した。結果を表７に示す。
（使用材料）
流動化剤：ナフタレンスルホン酸塩系流動化剤
200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of inorganic fine powder, 7 parts by mass of polymer, and fluidizing agent with respect to 100 parts by mass of cement The dry cement mortar added was adjusted as shown in the table. 42 parts by mass of water was added to this dry cement mortar and kneaded with a mortar mixer to obtain cement mortar, and the flow was measured. The results are shown in Table 7.
(Materials used)
Fluidizer: Naphthalene sulfonate fluidizer
表７によれば、流動化剤０．０１〜０．５質量部を加えることにより、フロー値が大きくなり、流動性が改善されているのがわかる。 According to Table 7, it can be seen that by adding 0.01 to 0.5 parts by mass of the fluidizing agent, the flow value is increased and the fluidity is improved.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及び増粘剤を表に示すように加えたドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、単位容積質量と圧縮強度を測定した。結果を表８に示す。
（使用材料）
増粘剤：メチルセルロース 市販品
（試験方法）
単位容積質量：JIS A 1171に準拠した。
200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of inorganic fine powder, 7 parts by mass of polymer, and thickener with respect to 100 parts by mass of cement The dry cement mortar added was adjusted as shown in the table. 42 parts by mass of water was added to this dry cement mortar and kneaded with a mortar mixer to obtain cement mortar, and the unit volume mass and compressive strength were measured. The results are shown in Table 8.
(Materials used)
Thickener: Methylcellulose Commercial product (test method)
Unit volume mass: Conforms to JIS A 1171.
表８によれば、増粘剤０．０１〜０．５質量部を加えることにより、フロー、単位容積質量が小さくなり、粘性が向上し、適度なコテ仕上げ性となるのがわかる。 According to Table 8, it can be seen that by adding 0.01 to 0.5 parts by mass of the thickener, the flow and unit volume mass are reduced, the viscosity is improved, and an appropriate trowel finish is obtained.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及びカルシウムアルミネート１００質量部に対してセッコウを表に示すように配合した混合物を１５質量部加え、ドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、材齢１日及び２８日の圧縮強度を測定した。結果を表９に示す。
（使用材料）
カルシウムアルミネート：Ｃ１２Ａ７の鉱物組成に相当する粉砕品、ブレーン値５５０
０ｃｍ2／ｇ、非晶質
セッコウ：無水セッコウ 市販品
200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of fine inorganic powder, 7 parts by mass of polymer, and calcium aluminate 100 with respect to 100 parts by mass of cement 15 parts by mass of a mixture containing gypsum as shown in the table with respect to parts by mass was added to prepare dry cement mortar. 42 parts by mass of water was added to the dry cement mortar, and the mixture was kneaded with a mortar mixer to obtain cement mortar. The compressive strength at the age of 1 day and 28 days was measured. The results are shown in Table 9.
(Materials used)
Calcium aluminate: ground product corresponding to mineral composition of C12A7, Blaine value 550
0cm 2 / g, amorphous gypsum: anhydrous gypsum
表９によれば、カルシウムアルミネート１００質量部に対してセッコウを２０〜３００質量部加えることにより、１日目、２８日目の圧縮強度が向上しており、強度発現性が改善されているのがわかる。 According to Table 9, by adding 20 to 300 parts by mass of gypsum to 100 parts by mass of calcium aluminate, the compression strength on the first day and the 28th day is improved, and the strength development is improved. I understand.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及びカルシウムアルミネート１００質量部に対してセッコウ１５０質量部配合した混合物を表に示すように加え、ドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、材齢１日及び２８日の圧縮強度を測定した。結果を表１０に示す。 200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of fine inorganic powder, 7 parts by mass of polymer, and calcium aluminate 100 with respect to 100 parts by mass of cement A mixture containing 150 parts by mass of gypsum with respect to parts by mass was added as shown in the table to prepare dry cement mortar. 42 parts by mass of water was added to the dry cement mortar, and the mixture was kneaded with a mortar mixer to obtain cement mortar. The compressive strength at the age of 1 day and 28 days was measured. The results are shown in Table 10.
表１０によれば、カルシウムアルミネートとセッコウの混合物３〜３０質量部を加えることにより、１日目、２８日目の圧縮強度が向上しており、急硬性が付与されているのがわかる。 According to Table 10, by adding 3 to 30 parts by mass of a mixture of calcium aluminate and gypsum, the compressive strength on the first day and the 28th day is improved, and it can be seen that rapid hardening is imparted.
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、カルシウムアルミネート１００質量部に対してセッコウ１５０質量部配合した混合物を１５質量部、及び凝結調整剤を表に示すように加え、ドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、可使時間と材齢１日圧縮強度を測定した。結果を表１１に示す。
（使用材料）
凝結調整剤：クエン酸 市販品
（試験方法）
可使時間：練り混ぜてから硬化するまでの時間。
200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of fine inorganic powder, 7 parts by mass of polymer, 100 parts by mass of calcium aluminate with respect to 100 parts by mass of cement A dry cement mortar was prepared by adding 15 parts by weight of a mixture containing 150 parts by weight of gypsum to the part and a setting modifier as shown in the table. 42 parts by mass of water was added to this dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar, and the pot life and age-one-day compressive strength were measured. The results are shown in Table 11.
(Materials used)
Setting agent: Citric acid Commercially available product (test method)
Pot life: Time from kneading to curing.
表１１によれば、凝結調整剤０．０５〜２質量部を加えることにより、可使時間が長くなり、凝結が調整（遅延）されているのがわかる。 According to Table 11, it can be seen that by adding 0.05 to 2 parts by mass of the setting modifier, the pot life is increased and the setting is adjusted (delayed).
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、さらに、繊維類、流動化剤、増粘剤を表に示すように加え、ドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、フロー、長さ変化、中性化深さ、材齢２８日の圧縮強度を測定した。結果を表１２に示す。 With respect to 100 parts by mass of cement, 200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of fine inorganic powder, 7 parts by mass of polymer, fibers, A fluidizing agent and a thickening agent were added as shown in the table to prepare dry cement mortar. 42 parts by mass of water was added to the dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar. The flow, length change, neutralization depth, and compressive strength at age 28 days were measured. The results are shown in Table 12.
表１２によれば、繊維類、流動化剤、増粘剤を適宜組み合わせて加えることにより、流動性がよく、硬化収縮が少なく、中性化抵抗性が向上し、圧縮強度の高い製品が得られることがわかる。 According to Table 12, by adding a combination of fibers, a fluidizing agent, and a thickener as appropriate, a product with good fluidity, less cure shrinkage, improved neutralization resistance, and high compressive strength is obtained. I understand that
セメント１００質量部に対して、骨材２００質量部、膨張材６質量部、ポリオキシアルキレン誘導体４質量部、消石灰２質量部、無機微粉末６質量部、ポリマー７質量部、及び繊維類０．０８質量部、流動化剤０．０５質量部、さらに、増粘剤、カルシウムアルミネート１００質量部に対してセッコウ１５０質量部配合した混合物、凝結調整剤を表に示すように加え、ドライセメントモルタルを調整した。このドライセメントモルタルに水を４２質量部加えモルタルミキサーで練り混ぜてセメントモルタルとし、フロー、長さ変化、中性化深さ、材齢２８日の圧縮強度を測定した。結果を表１２に示す。 With respect to 100 parts by mass of cement, 200 parts by mass of aggregate, 6 parts by mass of expansion material, 4 parts by mass of polyoxyalkylene derivative, 2 parts by mass of slaked lime, 6 parts by mass of fine inorganic powder, 7 parts by mass of polymer, and fibers 08 parts by mass, 0.05 parts by mass of a fluidizing agent, a thickener, a mixture of 150 parts by mass of gypsum with respect to 100 parts by mass of calcium aluminate, and a setting modifier as shown in the table, dry cement mortar Adjusted. 42 parts by mass of water was added to the dry cement mortar and kneaded with a mortar mixer to obtain a cement mortar. The flow, length change, neutralization depth, and compressive strength at age 28 days were measured. The results are shown in Table 12.
表１３によれば、カルシウムアルミネートとセッコウの混合物、凝結調整剤を適宜の割合で加え、さらに、増粘剤を適宜加えることにより、流動性がよく、硬化時間が調整され、硬化収縮が少なく、中性化抵抗性が向上し、圧縮強度の高い製品が得られることがわかる。
According to Table 13, a mixture of calcium aluminate and gypsum and a coagulation modifier are added at an appropriate ratio, and further, a thickener is added appropriately to improve fluidity, adjust the curing time, and reduce curing shrinkage. It can be seen that neutralization resistance is improved and a product with high compressive strength is obtained.
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