JP5298676B2 - Hydraulic composition and structure - Google Patents
Hydraulic composition and structure Download PDFInfo
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- JP5298676B2 JP5298676B2 JP2008181237A JP2008181237A JP5298676B2 JP 5298676 B2 JP5298676 B2 JP 5298676B2 JP 2008181237 A JP2008181237 A JP 2008181237A JP 2008181237 A JP2008181237 A JP 2008181237A JP 5298676 B2 JP5298676 B2 JP 5298676B2
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- hydraulic composition
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- 239000000203 mixture Substances 0.000 title claims abstract description 146
- 239000011429 hydraulic mortar Substances 0.000 claims abstract description 90
- 239000000843 powder Substances 0.000 claims abstract description 78
- 239000011347 resin Substances 0.000 claims abstract description 69
- 229920005989 resin Polymers 0.000 claims abstract description 69
- 239000004568 cement Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000004898 kneading Methods 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000011398 Portland cement Substances 0.000 claims description 32
- 239000011164 primary particle Substances 0.000 claims description 25
- 239000010440 gypsum Substances 0.000 claims description 21
- 229910052602 gypsum Inorganic materials 0.000 claims description 21
- 229920006243 acrylic copolymer Polymers 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 235000019738 Limestone Nutrition 0.000 claims description 14
- 239000006028 limestone Substances 0.000 claims description 14
- 239000002562 thickening agent Substances 0.000 claims description 13
- 239000000084 colloidal system Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 4
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 125000005396 acrylic acid ester group Chemical group 0.000 claims 1
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- 238000011049 filling Methods 0.000 abstract description 9
- 238000011161 development Methods 0.000 abstract description 5
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- 230000037303 wrinkles Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 14
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- -1 alkaline earth metal sulfate Chemical class 0.000 description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 5
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
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- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
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- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
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- 239000010881 fly ash Substances 0.000 description 2
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
- ROBFUDYVXSDBQM-UHFFFAOYSA-N hydroxymalonic acid Chemical compound OC(=O)C(O)C(O)=O ROBFUDYVXSDBQM-UHFFFAOYSA-N 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
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- 238000002360 preparation method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
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- 238000003892 spreading Methods 0.000 description 2
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- QBYIENPQHBMVBV-HFEGYEGKSA-N (2R)-2-hydroxy-2-phenylacetic acid Chemical compound O[C@@H](C(O)=O)c1ccccc1.O[C@@H](C(O)=O)c1ccccc1 QBYIENPQHBMVBV-HFEGYEGKSA-N 0.000 description 1
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 description 1
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- RBNPOMFGQQGHHO-UHFFFAOYSA-N -2,3-Dihydroxypropanoic acid Natural products OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 description 1
- VBSTXRUAXCTZBQ-UHFFFAOYSA-N 1-hexyl-4-phenylpiperazine Chemical compound C1CN(CCCCCC)CCN1C1=CC=CC=C1 VBSTXRUAXCTZBQ-UHFFFAOYSA-N 0.000 description 1
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- RBNPOMFGQQGHHO-UWTATZPHSA-N D-glyceric acid Chemical compound OC[C@@H](O)C(O)=O RBNPOMFGQQGHHO-UWTATZPHSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- IWYDHOAUDWTVEP-UHFFFAOYSA-N R-2-phenyl-2-hydroxyacetic acid Natural products OC(=O)C(O)C1=CC=CC=C1 IWYDHOAUDWTVEP-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- JACRWUWPXAESPB-QMMMGPOBSA-N Tropic acid Natural products OC[C@H](C(O)=O)C1=CC=CC=C1 JACRWUWPXAESPB-QMMMGPOBSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 229940103272 aluminum potassium sulfate Drugs 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000006103 coloring component Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- JCCYXJAEFHYHPP-OLXYHTOASA-L dilithium;(2r,3r)-2,3-dihydroxybutanedioate Chemical compound [Li+].[Li+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O JCCYXJAEFHYHPP-OLXYHTOASA-L 0.000 description 1
- JHFZWTMEVGPUTE-UHFFFAOYSA-L dilithium;2-hydroxybutanedioate Chemical compound [Li+].[Li+].[O-]C(=O)C(O)CC([O-])=O JHFZWTMEVGPUTE-UHFFFAOYSA-L 0.000 description 1
- WPUMTJGUQUYPIV-JIZZDEOASA-L disodium (S)-malate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](O)CC([O-])=O WPUMTJGUQUYPIV-JIZZDEOASA-L 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000005002 finish coating Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 229940074391 gallic acid Drugs 0.000 description 1
- 235000004515 gallic acid Nutrition 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
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- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 0.000 description 1
- 229940071264 lithium citrate Drugs 0.000 description 1
- WJSIUCDMWSDDCE-UHFFFAOYSA-K lithium citrate (anhydrous) Chemical compound [Li+].[Li+].[Li+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O WJSIUCDMWSDDCE-UHFFFAOYSA-K 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
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- 159000000001 potassium salts Chemical class 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
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- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
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Images
Landscapes
- Floor Finish (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、各種建築物等の構造物の下地表面に施工する際の作業性と、速硬性と、寸法安定性とに優れる水硬性組成物、及びその水硬性組成物を用いて得られる構造体に関する。特に、本発明は、各種建築物等の構造物の下地表面の凹部や隙間の充填にすり合わせ施工する際の、鏝塗り作業性と、速硬性と、寸法安定性とに優れる水硬性組成物、及びその水硬性組成物を用いて得られる構造体に関する。 The present invention relates to a hydraulic composition excellent in workability, quick curing, and dimensional stability when applied to the foundation surface of structures such as various buildings, and a structure obtained by using the hydraulic composition. About the body. In particular, the present invention is a hydraulic composition that is excellent in glazing workability, quick hardening, and dimensional stability when applied to fill the recesses and gaps of the foundation surface of structures such as various buildings, And a structure obtained using the hydraulic composition.
コンクリート表面のモルタル塗仕上げは、施工が簡易であり経済的にも安価であることから多種多様な箇所で用いられている。一般的にモルタル塗仕上げ工法は、使用材料としてポルトランド系セメントと砂を用いて、これに適当量の水を加えたセメントモルタルをコンクリートの表面に鏝を用いて塗り付ける方法である。 The mortar coating finish on the concrete surface is used in a wide variety of places because it is easy to construct and economical. In general, the mortar coating finishing method is a method in which Portland cement and sand are used as materials to be used, and cement mortar to which an appropriate amount of water is added is applied to the surface of concrete using a flaw.
モルタル塗仕上げに用いる組成物として、特許文献１には、主に左官工法によってモルタルやコンクリート系の構造物の修復に用いるのに好適なセメント系の厚付けモルタルに関し、軽量骨材と普通骨材からなる細骨材又は軽量骨材からなる細骨材、ポルトランドセメント、アルミナセメント、アルカリ土類金属硫酸塩、アルカリ金属炭酸塩、膨張材、増粘剤及び減水剤を含有してなる厚付けモルタルが開示されている。 As a composition used for mortar finishing, Patent Document 1 discloses a cement-based thickened mortar suitable for use in repairing mortar and concrete structures mainly by plastering method. Thick mortar containing fine aggregate made of or fine aggregate made of lightweight aggregate, Portland cement, alumina cement, alkaline earth metal sulfate, alkali metal carbonate, expansion material, thickener and water reducing agent Is disclosed.
また、特許文献２には、可使時間が長く、しかも可使時間内での流動性の変動が小さいため施工性に優れるとともに、超速硬性で早期開放が可能なモルタルに関し、アルミナセメント１００重量部に対して、ポルトランドセメント２０〜３００重量部、石膏１０〜１００重量部、硬化促進剤０．１〜５重量部及び硬化遅延剤０．１〜５重量部を含有するモルタルが開示されている。 Patent Document 2 discloses a mortar having a long working life and a small change in fluidity within the working life, so that the workability is excellent, and the mortar capable of early opening with super-hardness is 100 parts by weight of alumina cement. On the other hand, a mortar containing 20 to 300 parts by weight of Portland cement, 10 to 100 parts by weight of gypsum, 0.1 to 5 parts by weight of a curing accelerator and 0.1 to 5 parts by weight of a curing retarder is disclosed.
特許文献３には、道路舗装やトンネルコンクリートの補修等の覆工時に使用する急硬性組成物として、セメント、カルシウムアルミネート、石膏、凝結調整剤、及びアクリル酸エステル共重合体エマルションを含有してなる急硬性セメント組成物が開示されている。 Patent Document 3 contains cement, calcium aluminate, gypsum, a setting modifier, and an acrylate copolymer emulsion as a quick-hardening composition used for lining such as road pavement and tunnel concrete repair. A quick-hardening cement composition is disclosed.
建設工事現場でも機械化による各種の省力化工法が開発・実用化されつつあるが、モルタル仕上げを行う工程については、依然として左官職人に依存しているのが現状である。モルタル仕上げ作業は、微妙な調整に熟練度が要求されるが、一方で、それを担える左官職人については、高齢化や就業者数の減少により左官職人が不足する状況となっている。このため、より短工期で効率的にモルタル仕上げが可能な左官材料が求められている。 Various labor-saving construction methods by mechanization are being developed and put into practical use at construction sites, but the process of mortar finishing still depends on plasterers. Mortar finishing work requires skill for subtle adjustments. On the other hand, plasterers who can handle it have a shortage of plasterers due to aging and a decrease in the number of workers. For this reason, there is a need for plastering materials that can be mortar-finished efficiently in a shorter construction period.
本発明は、建築工事において左官職人がモルタル仕上げを行う行う場合に、ハンドリング性（可使時間）と、鏝塗り作業性と、すり合わせ施工性と、速硬性・早期強度発現性とに優れた水硬性組成物を提供することを目的とする。特に、本発明は、各種建築物等の構造物の下地表面の凹部や隙間の充填に使用でき、鏝塗り作業性と、すり合わせ施工性と、速硬性・早期強度発現性と、寸法安定性とに優れる水硬性組成物を提供することを目的とする。 The present invention provides water that has excellent handling properties (pot life), glazing workability, rubbing workability, quick hardening, and early strength development when a plasterer performs mortar finishing in construction work. An object is to provide a hard composition. In particular, the present invention can be used for filling recesses and gaps on the ground surface of structures such as various buildings, and it is possible to apply lacquering workability, rubbing workability, quick hardening / early strength development, and dimensional stability. It aims at providing the hydraulic composition which is excellent in.
本発明者らは、上記課題に対して鋭意研究開発に取組んだ結果、速硬性・速乾性に優れる水硬性成分と、特定の樹脂成分とを含む水硬性組成物を用いることによって、ハンドリング性が良好（可使時間が長く）、良好な鏝塗り作業性を有し、施工後の保形性が良好で、所定の可使時間が経過したのちに速やかに硬化が進行して、早期強度発現に優れた水硬性組成物を見出して本発明を完成させた。 As a result of diligent research and development on the above problems, the present inventors have achieved handling properties by using a hydraulic composition that includes a hydraulic component that is excellent in fast curing and quick drying properties and a specific resin component. Good (long pot life), good glazing workability, good shape retention after construction, harden quickly after a predetermined pot life, and develop early strength The present invention was completed by finding an excellent hydraulic composition.
即ち、本発明は、アルミナセメントを含む水硬性成分と、樹脂成分と、無機粉末とを含み、細骨材及び流動化剤を含まない水硬性組成物であって、水硬性組成物と水とを混合・混練して調製した水硬性モルタルについて、ＪＡＳＳ １５Ｍ−１０３に準拠したフロー試験で測定したフロー値が、５５〜９０ｍｍであることを特徴とする水硬性組成物である。 That is, the present invention is a hydraulic composition that includes a hydraulic component containing alumina cement, a resin component, and an inorganic powder, and does not include fine aggregates and a fluidizing agent. Is a hydraulic composition characterized in that a flow value measured by a flow test in accordance with JASS 15M-103 is 55 to 90 mm.
本発明の水硬性組成物の好ましい態様を以下に示す。本発明では、これらの態様を適宜組み合わせることができる。
（１）水硬性成分が、アルミナセメント、ポルトランドセメント及び石膏からなる。
（２）樹脂成分が再乳化型樹脂粉末であり、再乳化型樹脂粉末の１次粒子の平均粒径が０．２〜０．８μｍであり、再乳化型樹脂粉末の１次粒子表面がポリビニルアルコールの水溶性保護コロイドで被覆されたアクリル共重合再乳化型樹脂粉末である。
（３）水硬性組成物が、軽量骨材を含まない。
（４）水硬性組成物が、さらに凝結調整剤及び増粘剤から選ばれる成分を少なくとも１種以上含む。
（５）水硬性組成物と、水とを混練して調製した水硬性モルタルを硬化させた水硬性モルタル硬化体表面のショア硬度が、水硬性モルタルを鏝塗り施工したのち６時間後に５以上である。
（６）水硬性組成物が、水硬性組成物と、水とを混練して調製した水硬性モルタルを、鏝を用いて構造物の下地表面に鏝塗り施工するための水硬性組成物である。また、このときの鏝塗り施工が、好ましくは、鏝塗りすり合わせ施工である。
The preferable aspect of the hydraulic composition of this invention is shown below. In the present invention, these embodiments can be appropriately combined.
(1) The hydraulic component is composed of alumina cement, Portland cement and gypsum.
(2) The resin component is a re-emulsifying resin powder, the primary particles of the re-emulsifying resin powder have an average particle size of 0.2 to 0.8 μm, and the primary particle surface of the re-emulsifying resin powder is polyvinyl. An acrylic copolymer re-emulsifying resin powder coated with a water-soluble protective colloid of alcohol.
(3) The hydraulic composition does not contain a lightweight aggregate.
(4) The hydraulic composition further contains at least one component selected from a setting modifier and a thickener.
(5) The shore hardness of the surface of the cured mortar obtained by curing the hydraulic mortar prepared by kneading the hydraulic composition and water is 5 or more after 6 hours after the hydraulic mortar is applied. is there.
(6) The hydraulic composition is a hydraulic composition for applying a hydraulic mortar prepared by kneading the hydraulic composition and water to the base surface of the structure using a scissors. . Moreover, the glazing construction at this time is preferably glazing and laying construction.
また、本発明は、上記の水硬性組成物を用いて得られた水硬性モルタルを硬化させた水硬性モルタル硬化体を、構造物の下地表面の少なくとも一部に有する構造体である。 Moreover, this invention is a structure which has the hydraulic mortar hardening body which hardened the hydraulic mortar obtained using said hydraulic composition in at least one part of the foundation | substrate surface of a structure.
本発明により、建築工事において左官職人がモルタル仕上げやモルタル下地処理を行う場合に、ハンドリング性（可使時間）と、鏝塗り作業性と、すり合わせ施工性と、速硬性・早期強度発現性と、寸法安定性とに優れた水硬性組成物を得ることができる。 According to the present invention, when a plasterer performs a mortar finish or a mortar ground treatment in a building work, handling property (potential time), glazing workability, laying workability, quick-hardness / early strength expression, A hydraulic composition having excellent dimensional stability can be obtained.
本発明の水硬性組成物は、アルミナセメントを含む水硬性成分と、樹脂成分とを含み、細骨材及び流動化剤を含まない水硬性組成物である。また、本発明の水硬性組成物を、水と混合して調製して水硬性モルタルとした場合に、ＪＡＳＳ １５Ｍ−１０３に準拠したフロー試験で測定したフロー値が、５５〜９０ｍｍである。また、本発明の水硬性組成物は、水硬性成分として、アルミナセメント、ポルトランドセメント及び石膏からなる水硬性成分を好適に用いることができる。本発明の水硬性組成物は、ハンドリング性（可使時間）と、鏝塗り作業性と、速硬性・早期強度発現性とに優れるため、建築工事において左官職人がモルタル仕上げを行う場合のモルタルとして好適に用いることができる。 The hydraulic composition of the present invention is a hydraulic composition that includes a hydraulic component containing alumina cement and a resin component, and does not contain fine aggregates and a fluidizing agent. Moreover, when preparing the hydraulic composition of this invention by mixing with water and setting it as hydraulic mortar, the flow value measured by the flow test based on JASS 15M-103 is 55-90 mm. Moreover, the hydraulic composition of this invention can use suitably the hydraulic component which consists of an alumina cement, a Portland cement, and a gypsum as a hydraulic component. The hydraulic composition of the present invention is excellent in handling properties (pot life), glazing workability, quick hardening and early strength development, so that it is used as a mortar for plasterers to finish mortar in construction work. It can be used suitably.
アルミナセメントとしては、鉱物組成の異なるものが数種知られ市販されているが、何れも主成分はモノカルシウムアルミネート（ＣＡ）であり、市販品はその種類によらず使用することができる。 Several types of alumina cement having different mineral compositions are known and commercially available, but the main component is monocalcium aluminate (CA), and commercially available products can be used regardless of the type.
本発明の水硬性組成物に各種顔料を配合することによって、着色した水硬性モルタルの硬化体（水硬性モルタル硬化体）を得ることができる。本発明の水硬性組成物に各種顔料を配合する場合には、アルミナセメントとして、高い白色度を有する白色アルミナセメントを用いることが好ましい。 By blending various pigments with the hydraulic composition of the present invention, a colored cured mortar cured body (cured mortar cured body) can be obtained. When various pigments are blended in the hydraulic composition of the present invention, it is preferable to use white alumina cement having high whiteness as the alumina cement.
ポルトランドセメントは、普通ポルトランドセメント、早強ポルトランドセメント、超早強ポルトランドセメント、中庸熱ポルトランドセメント、低熱ポルトランドセメント及び白色ポルトランドセメントなどのポルトランドセメント、高炉セメント、フライアッシュセメント及びシリカセメントなどの混合セメントなどを用いることができる。 Portland cement includes ordinary Portland cement, early-strength Portland cement, ultra-early strong Portland cement, medium-heated Portland cement, low-heat Portland cement such as Portland cement and white Portland cement, mixed cement such as blast furnace cement, fly ash cement and silica cement Can be used.
本発明の水硬性組成物に各種顔料を配合し、着色した水硬性モルタル硬化体を得る場合には、ポルトランドセメントとして、高い白色度を有する白色ポルトランドセメントを用いることが好ましい。 When various pigments are blended in the hydraulic composition of the present invention to obtain a colored hydraulic mortar cured body, it is preferable to use white Portland cement having high whiteness as Portland cement.
石膏は、無水石膏、半水石膏及び二水石膏等の各石膏がその種類を問わず、１種又は２種以上の混合物として使用できる。石膏は、水硬性組成物と水とを混練して得られるモルタルが硬化した後の寸法安定性を保持する成分として機能するものである。 As for the gypsum, each gypsum such as anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum can be used as one type or a mixture of two or more types regardless of the type. Gypsum functions as a component that retains dimensional stability after the mortar obtained by kneading the hydraulic composition and water is cured.
本発明では、水硬性成分として、アルミナセメント、ポルトランドセメント及び石膏からなる水硬性成分を用いることが好ましい。水硬性成分は、アルミナセメント、ポルトランドセメント及び石膏の合計質量を１００質量部とした場合に、好ましくはアルミナセメント２０〜８０質量部、ポルトランドセメント５〜７０質量部及び石膏５〜４５質量部からなる組成、より好ましくはアルミナセメント３０〜７０質量部、ポルトランドセメント１５〜６０質量部及び石膏１０〜４０質量部からなる組成、さらに好ましくはアルミナセメント３５〜６０質量部、ポルトランドセメント２０〜５０質量部及び石膏１５〜３５質量部からなる組成、特に好ましくはアルミナセメント４０〜５０質量部、ポルトランドセメント２５〜４０質量部及び石膏１７〜２７質量部からなる組成を用いることにより、速硬性・速乾性を有し、低収縮性又は低膨張性で硬化中の体積変化が少なく、クラックの発生を抑制した硬化体が得られやすいために好ましい。 In the present invention, it is preferable to use a hydraulic component made of alumina cement, Portland cement and gypsum as the hydraulic component. The hydraulic component is preferably composed of 20 to 80 parts by mass of alumina cement, 5 to 70 parts by mass of Portland cement, and 5 to 45 parts by mass of gypsum when the total mass of alumina cement, Portland cement and gypsum is 100 parts by mass. Composition, more preferably a composition comprising 30 to 70 parts by weight of alumina cement, 15 to 60 parts by weight of Portland cement and 10 to 40 parts by weight of gypsum, more preferably 35 to 60 parts by weight of alumina cement, 20 to 50 parts by weight of Portland cement and By using a composition comprising 15 to 35 parts by mass of gypsum, particularly preferably a composition comprising 40 to 50 parts by mass of alumina cement, 25 to 40 parts by mass of Portland cement, and 17 to 27 parts by mass of gypsum, it has fast hardening and quick drying properties. Low shrinkage or low expansion and little volume change during curing It preferred for the cured body which suppresses the occurrence of cracks can be easily obtained.
本発明の水硬性組成物で使用する樹脂成分としては、特に限定されるものではなく、市販のポリマーエマルションや再乳化型樹脂粉末などから適宜選択して使用することができる。本発明の水硬性組成物では、構成成分の配合比率を厳格に品質管理できることから構成成分をプレミックス化して供給することが好ましい。このため樹脂成分については、粉末状の再乳化型樹脂粉末を好適に使用することができる。 The resin component used in the hydraulic composition of the present invention is not particularly limited, and can be appropriately selected from commercially available polymer emulsions and re-emulsifying resin powders. In the hydraulic composition of the present invention, it is preferable that the constituent components are premixed and supplied because the composition ratio of the constituent components can be strictly controlled. For this reason, about a resin component, a powdery re-emulsification type resin powder can be used conveniently.
本発明の水硬性組成物は、水硬性モルタルを施工した場合の水硬性モルタル硬化体表面の乾燥による皺や気泡跡の発生や、材料分離によるブリーディング水の発生を防止して、硬化体表面の仕上りを大幅に向上させる効果とともに、硬化体の弾性を高めてひび割れの発生を防止する効果と、硬化体と下地との接着強度を向上させる効果とを付与するために再乳化型樹脂粉末を使用する。再乳化型樹脂粉末を用いることによって前記の効果が得られ、耐久性及び耐候性に優れたモルタル硬化体を得ることができる。 The hydraulic composition of the present invention prevents generation of wrinkles and bubble marks due to drying of the surface of the hardened mortar cured body when applying the hydraulic mortar, and generation of bleeding water due to material separation. Re-emulsified resin powder is used to give the effect of significantly improving the finish as well as the effect of increasing the elasticity of the cured body to prevent cracking and improving the adhesive strength between the cured body and the substrate. To do. By using the re-emulsifying resin powder, the above effects can be obtained, and a cured mortar body having excellent durability and weather resistance can be obtained.
樹脂成分の製造方法については、特にその種類・プロセスは限定されず、公知の製造方法で製造されたものを用いることができる。また樹脂成分としては、ブロッキング防止剤を主に樹脂成分の表面に付着しているものを用いることができる。また樹脂成分としては、水性ポリマーディスパーションを噴霧やフリーズドライなどの方法で、溶媒を除去し乾燥した再乳化型の樹脂粉末を用いることができる。 About the manufacturing method of a resin component, the kind and process in particular are not limited, What was manufactured with the well-known manufacturing method can be used. Moreover, as a resin component, what has adhered the antiblocking agent mainly to the surface of the resin component can be used. Further, as the resin component, a re-emulsification type resin powder obtained by removing the solvent and drying the aqueous polymer dispersion by a method such as spraying or freeze drying can be used.
本発明では、樹脂成分として保護コロイドアクリルエマルションから製造されたアクリル共重合系の再乳化型樹脂粉末を好適に用いることができ、特に、保護コロイドアクリルエマルションから製造されたアクリル酸エステル／メタアクリル酸エステル共重合体の再乳化型樹脂粉末を好適に用いることができる。 In the present invention, an acrylic copolymer-based re-emulsifying resin powder produced from a protective colloid acrylic emulsion can be suitably used as the resin component, and in particular, an acrylate / methacrylic acid produced from a protective colloid acrylic emulsion. An ester copolymer re-emulsifying resin powder can be suitably used.
アクリル共重合系の再乳化型樹脂粉末などの樹脂成分の１次粒子（エマルションの粒子）の平均粒径は、好ましくは０．２〜０．８μｍの範囲であり、より好ましくは０．２５〜０．７５μｍの範囲であり、さらに好ましくは０．３〜０．７μｍの範囲であり、特に好ましくは０．３５〜０．６５μｍの範囲のものを選択して用いることができる。このような１次粒子の平均粒径を有する再乳化型樹脂粉末を含む水硬性組成物は、良好な施工性と、緻密なポリマーフィルムの形成によって得られる優れた接着性や耐久性・耐候性とを併せて得ることができることから好ましい。 The average particle diameter of primary particles (emulsion particles) of a resin component such as an acrylic copolymer re-emulsifying resin powder is preferably in the range of 0.2 to 0.8 μm, more preferably 0.25 to 0.25. It is in the range of 0.75 μm, more preferably in the range of 0.3 to 0.7 μm, and particularly preferably in the range of 0.35 to 0.65 μm. A hydraulic composition containing a re-emulsifying resin powder having an average particle size of such primary particles is excellent in workability and excellent adhesion, durability and weather resistance obtained by forming a dense polymer film. And can be obtained together.
樹脂成分の１次粒子の平均粒径が前記範囲のアクリル共重合系の再乳化型樹脂粉末を用いた水硬性モルタルでは、左官鏝などを用いてモルタル表面を平滑に仕上げる場合に、良好な鏝送り性と、鏝伸び性とを得ることができる。 In the case of hydraulic mortar using an acrylic copolymer-based re-emulsifying resin powder having an average particle size of the primary particle of the resin component in the above range, when the surface of the mortar is smoothed using a plasterer, etc. Feedability and stretchability can be obtained.
樹脂成分の１次粒子の平均粒径が前記範囲より大きい場合、その樹脂成分を有する水硬性組成物を用いたモルタル施工時の作業性は良好なものの、モルタル硬化体の接着性や耐久性・耐候性が低下する恐れがある。また、樹脂成分の１次粒子の平均粒径が前記範囲より小さい場合、モルタル硬化体の接着性や耐久性・耐候性は良好であるが、モルタル施工時の鏝送り性と鏝伸び性が低下して作業性が悪くなる恐れがある。これらのことから、本発明の水硬性組成物に含まれる樹脂成分の１次粒子の平均粒径が前記範囲であることが好ましい。 When the average particle diameter of the primary particles of the resin component is larger than the above range, the workability at the time of mortar construction using the hydraulic composition having the resin component is good, but the adhesiveness and durability of the mortar cured body The weather resistance may be reduced. In addition, when the average particle size of the primary particles of the resin component is smaller than the above range, the adhesiveness, durability and weather resistance of the mortar cured body are good, but the feedability and the stretchability of the mortar are reduced. As a result, workability may deteriorate. From these things, it is preferable that the average particle diameter of the primary particle of the resin component contained in the hydraulic composition of this invention is the said range.
本発明では、アクリル共重合系の再乳化型樹脂粉末１００質量％中に再乳化型樹脂粉末の１次粒子の粒径が、好ましくは０．１〜１μｍの粒子を９７質量％以上含み、より好ましくは、０．１５〜０．９μｍの粒子を９５質量％以上含み、さらに好ましくは０．２〜０．８μｍの粒子を９０質量％以上含み、特に好ましくは０．３〜０．７μｍの粒子を７５質量％以上含むものを選択して用いることができる。このような１次粒子の粒径分布によって、本発明の水硬性組成物を用いた場合の良好な施工性と、緻密なポリマーフィルムの形成によって得られる優れた接着性や耐久性・耐候性とを併せて得られることから好ましい。 In the present invention, the particle size of the primary particles of the re-emulsifiable resin powder in 100% by mass of the acrylic copolymer-based re-emulsified resin powder, preferably contains 97% by mass or more of 0.1-1 μm particles, Preferably, it contains 95% by mass or more of 0.15-0.9 μm particles, more preferably 90% by mass or more of 0.2-0.8 μm particles, and particularly preferably 0.3-0.7 μm particles. Can be selected and used. Due to the particle size distribution of such primary particles, good workability when using the hydraulic composition of the present invention, and excellent adhesion, durability and weather resistance obtained by forming a dense polymer film, Is preferable because it is obtained together.
前記範囲の粒径の１次粒子を前記質量割合の範囲で含む場合、アクリル共重合系の再乳化型樹脂粉末を用いた水硬性モルタルでは、左官鏝などを用いてモルタル表面を平滑に仕上げる場合に、良好な鏝塗り特性（鏝切れ性、鏝送り性、鏝伸び性、鏝離れ性）を得ることができる。 When primary particles having a particle size in the above range are included in the above mass ratio range, in the case of hydraulic mortar using an acrylic copolymer-based re-emulsifying resin powder, the surface of the mortar is smoothed using a plasterer etc. In addition, it is possible to obtain good wrinkling characteristics (cutting property, wrinkle feeding property, wrinkle stretchability, wrinkle release property).
樹脂成分の１次粒子の粒径が前記分布の範囲より粒径の大きいものが多い傾向にある場合、モルタル施工時の作業性は良好なものの、モルタル硬化体の接着性や耐久性・耐候性が低下する恐れがある。また、樹脂成分の１次粒子の粒径が前記分布の範囲より粒径の小さいものが多い傾向にある場合、モルタル硬化体の接着性や耐久性・耐候性は良好であるが、モルタル施工時の鏝塗り特性が低下して作業性が悪くなる恐れがある。これらのことから、樹脂成分の１次粒子の粒径が前記分布の範囲であることが好ましい。 When the particle size of the primary particles of the resin component tends to be larger than the above distribution range, the workability during mortar construction is good, but the adhesiveness, durability, and weather resistance of the cured mortar May decrease. In addition, when the particle size of the primary particles of the resin component tends to be smaller than the distribution range, the adhesiveness, durability and weather resistance of the mortar cured body are good, but at the time of mortar construction There is a risk that workability will be deteriorated due to deterioration of the wrinkling characteristics. From these things, it is preferable that the particle size of the primary particle of a resin component is the range of the said distribution.
本発明で用いるアクリル共重合系の再乳化型樹脂粉末は、その１次粒子がポリビニルアルコールの水溶性保護コロイドで被覆されていることが好ましい。再乳化型樹脂粉末の１次粒子表面が、ポリビニルアルコールの水溶性保護コロイドで被覆されていることによって、再乳化の過程で速やかに且つ均一にもとのエマルションの状態（樹脂粉末化前の１次粒子の状態）、すなわち、水硬性モルタル中に１次粒子が均一に分散した状態を実現することができる。 The acrylic copolymer-based re-emulsifying resin powder used in the present invention preferably has primary particles coated with a water-soluble protective colloid of polyvinyl alcohol. The surface of the primary particles of the re-emulsified resin powder is coated with a water-soluble protective colloid of polyvinyl alcohol, so that the state of the original emulsion quickly (1 before resin powdering) in the re-emulsification process. Secondary particle state), that is, a state in which primary particles are uniformly dispersed in the hydraulic mortar.
本発明では、前記範囲の粒径の１次粒子を前記質量割合の範囲で含み、且つ、１次粒子の表面がポリビニルアルコールの水溶性保護コロイドで被覆されているアクリル共重合系の再乳化型樹脂粉末を選択して用いることによって、モルタル施工時に優れた作業性を得ることができるとともに、モルタル硬化体においては接着性や耐候性、耐水性及び耐アルカリ性に優れた特性を得ることができる。 In the present invention, an acrylic copolymer-based re-emulsification type comprising primary particles having a particle size in the above range within the above mass ratio, and the surfaces of the primary particles being coated with a water-soluble protective colloid of polyvinyl alcohol. By selecting and using the resin powder, it is possible to obtain excellent workability at the time of mortar construction, and it is possible to obtain characteristics excellent in adhesion, weather resistance, water resistance and alkali resistance in the mortar cured body.
本発明で用いるアクリル共重合系の再乳化型樹脂粉末は、噴霧乾燥処理などの工程を経て、１次粒子が凝集した２次粒子の形態で用いられる。本発明で用いるアクリル共重合系の再乳化型樹脂粉末の２次粒子の粒子径は、好ましくは２０〜１００μｍの範囲であり、より好ましくは３０〜９０μｍの範囲であり、さらに好ましくは４５〜８５μｍの範囲であり、特に好ましくは５０〜８０μｍの範囲である。再乳化型樹脂粉末の２次粒子の粒子径がこのような範囲であると、再乳化型樹脂粉末を含む水硬性組成物と水とを混練してモルタル化する過程で、再乳化型樹脂粉末の２次粒子が水硬性組成物に含まれている他の粒子によって解砕されて容易に再分散し、１次粒子が均一に分散した状態になりやすい。そのため前記範囲の２次粒子径を有する再乳化型樹脂粉末を用いることが好ましい。 The acrylic copolymer-based re-emulsifying resin powder used in the present invention is used in the form of secondary particles in which primary particles are aggregated through a process such as spray drying. The particle diameter of the secondary particles of the acrylic copolymer-based re-emulsifying resin powder used in the present invention is preferably in the range of 20 to 100 μm, more preferably in the range of 30 to 90 μm, still more preferably 45 to 85 μm. And particularly preferably in the range of 50 to 80 μm. When the particle size of the secondary particles of the re-emulsifying resin powder is within such a range, the re-emulsifying resin powder is in the process of kneading the hydraulic composition containing the re-emulsifying resin powder and water into a mortar. These secondary particles are easily crushed by other particles contained in the hydraulic composition and easily redispersed, and the primary particles tend to be uniformly dispersed. Therefore, it is preferable to use a re-emulsifying resin powder having a secondary particle diameter in the above range.
再乳化型樹脂粉末の２次粒子径が前記範囲より大きくなるとモルタル化の過程で再分散されにくくなり、１次粒子が均一に分散した状態になり難くなることから、前記範囲の上限以下であることが好ましい。また、再乳化型樹脂粉末の２次粒子径が前記範囲より小さくなると、工場においてプレミックスして水硬性組成物を製造する際に、再乳化型樹脂粉末が飛散して作業環境が悪化するなどのハンドリング性が悪くなることから、前記範囲の下限以上であることが好ましい。 When the secondary particle diameter of the re-emulsifying resin powder is larger than the above range, it is difficult to re-disperse in the process of mortarization, and the primary particles are hardly uniformly dispersed. It is preferable. In addition, when the secondary particle size of the re-emulsifying resin powder is smaller than the above range, the re-emulsifying resin powder is scattered when the hydraulic composition is produced by premixing at the factory, and the working environment is deteriorated. In this case, the lower limit of the above range is preferable.
本発明で使用する再乳化型樹脂粉末を、水硬性成分１００質量部に対して、好ましくは１〜２０質量部、さらに好ましくは２〜１５質量部、より好ましくは３〜１２質量部、特に好ましくは５〜８質量部の範囲で配合することによって、良好な作業性と高耐久な硬化体特性を併せ持つ水硬性組成物を得ることができる。 The re-emulsifying resin powder used in the present invention is preferably 1 to 20 parts by mass, more preferably 2 to 15 parts by mass, more preferably 3 to 12 parts by mass, particularly preferably 100 parts by mass of the hydraulic component. Can be obtained in a range of 5 to 8 parts by mass to obtain a hydraulic composition having both good workability and highly durable cured product characteristics.
再乳化型樹脂粉末の配合割合が、前記範囲よりも大きい場合、水硬性組成物に水を加えて得られるモルタルの粘度が高くなり、施工性及び鏝作業性が低下し、表層の乾燥による皺や気泡跡が発生し易くなるとともに、硬化体の圧縮強さが低下する傾向がある。また、配合割合が前記範囲より小さい場合には、モルタル硬化体の弾性向上によるひび割れ抑制効果が小さくなり、モルタル硬化体の表面仕上りも悪くなる傾向がある。そのため、本発明で使用する再乳化型樹脂粉末の配合割合は、１〜２０質量部の範囲が好ましい。 When the blending ratio of the re-emulsification type resin powder is larger than the above range, the viscosity of the mortar obtained by adding water to the hydraulic composition increases, the workability and dredging workability decrease, And bubble marks tend to occur, and the compressive strength of the cured body tends to decrease. Moreover, when a mixture ratio is smaller than the said range, the crack inhibitory effect by the elasticity improvement of a mortar hardening body will become small, and the surface finish of a mortar hardening body tends to worsen. Therefore, the blending ratio of the re-emulsifying resin powder used in the present invention is preferably in the range of 1 to 20 parts by mass.
本発明の水硬性組成物は、建築物等の構造物の下地表面の凹凸をスムースに均す、凹部に充填して平滑に補修する、或いはひび割れ部分に充填する等の補修することを主な目的とするものであり、下地表面と補修部分との境界部分を可能な限りスムースにすり合わせ仕上げすることが重要である。 The hydraulic composition of the present invention mainly repairs the unevenness of the ground surface of structures such as buildings by smoothing, filling the recesses and repairing them smoothly, or filling cracks. It is an object, and it is important to finish the boundary portion between the base surface and the repair portion as smoothly as possible.
「すり合わせ」とは、図１に一例を示すように、下地表面に段差１４がある場合に、鏝等を用いて水硬性モルタルを塗り付けて、段差１４の下段から上段に対して緩やかなスロープを形成して段差をなくして平坦化する過程で、水硬性モルタルを連続的に薄く施工し、特に段差の下面に鏝が接する部分を、水硬性モルタルを極めて薄層を形成するように施工することをいう。「すり合わせ」施工された水硬性モルタルの硬化体表面と、段差の下段の表面とは、あたかも一体化した表面が形成されることになる。この結果、図１に模式的に示すような形状の水硬性モルタル硬化体２１ａを形成することができる。また、「すり合わせ仕上げ」とは、「すり合わせ」により施工された表面仕上げのことをいう。段差が凸状（図２に示すような凸部１５）の場合、すなわち両側に段差がある場合でも、両方の段差に対してすり合わせ仕上げを施工することによって平坦化し、図２に示すような水硬性モルタル硬化体２１ａを形成することができる。すり合わせにより平坦化できる段差とは、例えば２０ｍｍ程度以下の段差である。鏝塗りによってすり合わせ仕上げを施工することを、「鏝塗りすり合わせ施工」という。
As shown in FIG. 1, “grinding” means that when there is a
水硬性組成物が細骨材を含む場合、鏝塗りすり合わせ施工をすると、細骨材中の粗い粒子が下地表面と補修部分との境界部分のスムースな仕上がり部分で、鏝と下地表面との間に噛み合って、良好な仕上がり面を形成することができない。このような理由から、本発明の水硬性組成物には、細骨材の添加は不要である。したがって、本発明の水硬性組成物は、細骨材を含まない。 When the hydraulic composition contains fine aggregate, when the glazing is applied, the coarse particles in the fine aggregate are smooth finishes at the boundary between the foundation surface and the repaired part, and the gap between the collar and the foundation surface. It is impossible to form a good finished surface. For these reasons, it is not necessary to add fine aggregate to the hydraulic composition of the present invention. Therefore, the hydraulic composition of the present invention does not contain fine aggregate.
なお、細骨材とは、珪砂、川砂、海砂、山砂及び砕砂などの砂類であって、粒径３０〜８５０μｍのものである。細骨材の粒径は、ＪＩＳ Ｚ ８８０１に規定される呼び寸法の異なる数個のふるいを用いて測定することができる。本発明の水硬性組成物は、特に１５０μｍを超える粒径の細骨材を全く含まない。 The fine aggregate is sand such as quartz sand, river sand, sea sand, mountain sand, and crushed sand, and has a particle size of 30 to 850 μm. The particle diameter of the fine aggregate can be measured using several sieves having different nominal dimensions as defined in JIS Z 8801. The hydraulic composition of the present invention does not contain any fine aggregate having a particle size of more than 150 μm.
また、本発明の水硬性組成物には、パーライトや発泡骨材などの軽量骨材を含まないことが好ましい。パーライトなどの軽量骨材を本発明の水硬性組成物に用いた場合、鏝塗り作業性をより向上させることができることもある反面、水硬性モルタル硬化体は、高い強度特性を得にくく、長期供用時の耐久性に乏しくなる傾向があることから好ましくない。 Moreover, it is preferable that lightweight composition, such as a pearlite and a foam aggregate, is not contained in the hydraulic composition of this invention. When lightweight aggregates such as pearlite are used in the hydraulic composition of the present invention, the glazing workability may be further improved, but the hardened mortar hardened body is difficult to obtain high strength characteristics and is used for a long time. This is not preferable because it tends to be poor in durability at the time.
本発明の水硬性組成物は、アルミナセメントを含む水硬性成分と、アクリル共重合系の再乳化型樹脂粉末とを含み、さらに無機粉末を含み、凝結調整剤（凝結遅延剤及び／又は凝結促進剤）及び増粘剤から選ばれる成分を少なくとも１種以上含み、並びに細骨材及び流動化剤を含まないものである。さらに、本発明の水硬性組成物は、アルミナセメント、ポルトランドセメント及び石膏からなる水硬性成分と、アクリル共重合系の再乳化型樹脂粉末とを含み、さらに無機粉末含み、凝結調整剤（凝結遅延剤及び／又は凝結促進剤）及び増粘剤から選ばれる成分を少なくとも１種以上含み、並びに細骨材及び流動化剤を含まないものである。 The hydraulic composition of the present invention includes a hydraulic component containing alumina cement, an acrylic copolymer-based re-emulsifying resin powder, an inorganic powder, and a setting modifier (setting retarder and / or setting accelerator). Agent) and at least one component selected from thickeners, and does not contain fine aggregate and fluidizing agent. Further, the hydraulic composition of the present invention includes a hydraulic component composed of alumina cement, Portland cement and gypsum, an acrylic copolymer-based re-emulsifying resin powder, further includes an inorganic powder, and a setting modifier (setting delay). Agent and / or setting accelerator) and at least one component selected from thickeners, and does not contain fine aggregate and fluidizing agent.
本発明では、水硬性モルタルを施工する場合に、良好な鏝塗り作業性とすり合わせ施工性とを得るために、細骨材を用いずに無機粉末を使用する。本発明では、水硬性モルタルを用いて鏝塗り作業により、施工面の凹凸部を平滑に仕上げるためのすり合わせ施工に好適に対応できるように、粒子径が１５０μｍより大きい粒子を含まない、すなわち粒子径が１５０μｍ以下の粒子のみを含む無機粉末を用いることが好ましい。 In the present invention, when a hydraulic mortar is applied, an inorganic powder is used without using fine aggregates in order to obtain a good glazing workability and a rub workability. In the present invention, the particle size does not include particles larger than 150 μm, that is, the particle size does not include particles larger than 150 μm so that it can be suitably applied to the laminating operation for smoothly finishing the concavo-convex portion of the construction surface by the glazing operation using hydraulic mortar. It is preferable to use an inorganic powder containing only particles having a particle size of 150 μm or less.
本発明の水硬性組成物は、高炉スラグ微粉末、フライアッシュ、シリカヒューム、石灰石微粉末（炭酸カルシウム微粉末）及びドロマイト微粉末から選ばれる少なくとも１種以上の無機粉末を含むことが好ましく、特に石灰石微粉末を含むことにより、良好な鏝塗り作業性を得ることができ、特に鏝塗り施工によってすり合わせ部（すり合わせ仕上げにより平坦にした部分）を形成する場合に滑らかにすり合わせ部を形成することができることから好ましい。また、無機粉末として石灰石微粉末を用いた場合、鏝塗り施工した水硬性モルタルの保形性が高まり、水硬性モルタルのダレを防止する効果も高めることができる。 The hydraulic composition of the present invention preferably contains at least one inorganic powder selected from blast furnace slag fine powder, fly ash, silica fume, limestone fine powder (calcium carbonate fine powder) and dolomite fine powder, in particular. By including limestone fine powder, good glazing workability can be obtained, especially when forming a rubbed part (part flattened by rubbed finishing) by glazing construction, a smooth rubbed part can be formed. It is preferable because it is possible. In addition, when limestone fine powder is used as the inorganic powder, the shape retention of the hydraulic mortar that has been applied by crease increases, and the effect of preventing dripping of the hydraulic mortar can also be enhanced.
本発明の水硬性組成物において、無機粉末の添加量は、水硬性成分１００質量部に対し、好ましくは１５０〜３５０質量部、より好ましくは１８０〜３００質量部、さらに好ましくは２００〜２７０質量部、特に好ましくは２１０〜２５０質量部とするのが好ましい。 In the hydraulic composition of the present invention, the added amount of the inorganic powder is preferably 150 to 350 parts by mass, more preferably 180 to 300 parts by mass, and further preferably 200 to 270 parts by mass with respect to 100 parts by mass of the hydraulic component. Especially preferably, it is preferable to set it as 210-250 mass parts.
本発明の水硬性組成物において、石灰石微粉末の添加量は、水硬性成分１００質量部に対し、好ましくは１５０〜３５０質量部、より好ましくは１８０〜３００質量部、さらに好ましくは２００〜２７０質量部、特に好ましくは２１０〜２５０質量部とするのが好ましい。石灰石微粉末の添加量が、少なすぎると水硬性モルタルを鏝塗り施工する際の鏝塗り特性が悪くなることがあり、多すぎると鏝塗り施工に適した水硬性モルタルの流動性を得るための水量が増加し、長期強度の低下を招くことがある。 In the hydraulic composition of the present invention, the amount of fine limestone powder added is preferably 150 to 350 parts by mass, more preferably 180 to 300 parts by mass, and still more preferably 200 to 270 parts by mass with respect to 100 parts by mass of the hydraulic component. Parts, particularly preferably 210 to 250 parts by mass. If the amount of fine limestone powder added is too small, the characteristics of the mortar coating may deteriorate when the hydraulic mortar is applied, and if too much, the fluidity of the hydraulic mortar suitable for the mortar application is obtained. The amount of water increases, and long-term strength may be reduced.
本発明の水硬性組成物に添加する石灰石微粉末は、特に限定されるものではなく市販のものを用いることができる。石灰石微粉末の粉末度（ブレーン比表面積）は、３，０００〜５，０００ｃｍ２／ｇのものを好適に用いることができる。ブレーン比表面積が３，０００ｃｍ２／ｇ以上の場合、鏝塗り作業を行った水硬性モルタルの保形性を高める効果が十分であることから好ましく、５，０００ｃｍ２／ｇ以下であると水硬性モルタルの粘性が高くなる傾向が顕著になって鏝塗り作業性を阻害するという問題が生じないため好ましい。 The limestone fine powder added to the hydraulic composition of the present invention is not particularly limited, and a commercially available product can be used. As the fineness (brane specific surface area) of the fine limestone powder, a powder having a fine particle size of 3,000 to 5,000 cm 2 / g can be suitably used. When the specific surface area of the brain is 3,000 cm 2 / g or more, it is preferable because the effect of improving the shape retention of the hydraulic mortar subjected to the glazing operation is sufficient, and the hydraulic property is 5,000 cm 2 / g or less. This is preferable because the tendency of the viscosity of the mortar to become high and the problem of hindering the glazing workability does not occur.
本発明の水硬性組成物では、水硬性モルタルの流動性を向上させるために用いられる流動化剤（或いは減水剤）を使用しない。一般的に、流動化剤を用いることによって、水硬性モルタルを調製する場合に少ない水量で良好な流動性状を得ることができるが、建築物などの構造物の下地表面に水硬性モルタルを鏝塗り施工して、層状の水硬性モルタル施工部を形成したり、構造物の下地表面の凹部に水硬性モルタルを充填した場合、その流動性によってダレが発生し、スムースな施工面を保形できないことがある。本発明の水硬性組成物には、流動化剤（或いは減水剤）を用いないことにより、鏝塗り施工によって建築物などの構造物の下地表面に層状の水硬性モルタル施工部を形成したり、下地表面の凹部に水硬性モルタルを充填する場合でも、施工された水硬性モルタルの保形性を高めることができる。特に本発明の水硬性組成物を用いてすり合わせ施工を行った場合には、下地部分と水硬性モルタルとの境界部分の仕上がり性を高めることができる。 In the hydraulic composition of the present invention, a fluidizing agent (or water reducing agent) used for improving the fluidity of hydraulic mortar is not used. In general, by using a fluidizing agent, it is possible to obtain good fluidity with a small amount of water when preparing hydraulic mortar. However, hydraulic mortar is applied to the ground surface of structures such as buildings. When it is constructed to form a layered hydraulic mortar construction part or when a hydraulic mortar is filled in the concave part of the foundation surface of the structure, sagging occurs due to its fluidity and the smooth construction surface cannot be retained There is. In the hydraulic composition of the present invention, by not using a fluidizing agent (or water reducing agent), a layered hydraulic mortar construction part is formed on the ground surface of a structure such as a building by glazing, Even when the hydraulic mortar is filled in the concave portion of the base surface, the shape retention of the constructed hydraulic mortar can be improved. In particular, when the construction is performed using the hydraulic composition of the present invention, the finish of the boundary portion between the base portion and the hydraulic mortar can be enhanced.
凝結調整剤（凝結遅延剤及び凝結促進剤）は、使用する水硬性成分や水硬性組成物の構成成分に応じて、特性を損なわない範囲で適宜添加することができる。凝結遅延剤の成分、又は凝結遅延剤及び凝結促進剤の成分、添加量及び混合比率を適宜選択することによって、水硬性組成物の可使時間と速硬性・速乾性とを調整することができ、水硬性組成物としての使用が非常に容易になるため好ましい。本発明の水硬性組成物では、凝結調整剤として凝結遅延剤のみを使用することにより、良好なハンドリング性を確保した上で、適度な速硬性を緩やかに発現させることができる。 The setting modifier (setting retarder and setting accelerator) can be appropriately added in a range that does not impair the characteristics, depending on the hydraulic component used and the constituent components of the hydraulic composition. By properly selecting the components of the setting retarder, or the components of the setting retarder and the setting accelerator, the addition amount, and the mixing ratio, the pot life, quick hardening and quick drying of the hydraulic composition can be adjusted. It is preferable because use as a hydraulic composition becomes very easy. In the hydraulic composition of the present invention, by using only a setting retarder as a setting adjusting agent, it is possible to moderately develop an appropriate fast hardening property while ensuring good handling properties.
凝結遅延剤としては、公知の凝結遅延剤を用いることができる。凝結遅延剤の一例として、酒石酸ナトリウム類、リンゴ酸ナトリウム、クエン酸ナトリウム類、グルコン酸ナトリウムなどのオキシカルボン酸類や、硫酸ナトリウム、重炭酸ナトリウムなどの無機ナトリウム塩などを、それぞれの成分を単独で又は２種以上の成分を併用して用いることができる。 As the setting retarder, a known setting retarder can be used. Examples of setting retarders include oxycarboxylic acids such as sodium tartrate, sodium malate, sodium citrate, and sodium gluconate, and inorganic sodium salts such as sodium sulfate and sodium bicarbonate. Alternatively, two or more components can be used in combination.
オキシカルボン酸類は、オキシカルボン酸及びこれらの塩を含む。オキシカルボン酸としては、例えばクエン酸、グルコン酸、酒石酸、グリコール酸、乳酸、ヒドロアクリル酸、α−オキシ酪酸、グリセリン酸、タルトロン酸、リンゴ酸などの脂肪族オキシ酸、サリチル酸、ｍ−オキシ安息香酸、ｐ−オキシ安息香酸、没食子酸、マンデル酸、トロパ酸等の芳香族オキシ酸等を挙げることができる。オキシカルボン酸の塩としては、例えばオキシカルボン酸のアルカリ金属塩（具体的にはナトリウム塩、カリウム塩など）、アルカリ土類金属塩（具体的にはカルシウム塩、バリウム塩、マグネシウム塩など）などを挙げることができる。特に重炭酸ナトリウムやＬ−酒石酸ナトリウムは、凝結遅延効果、入手容易性及び価格の面から好ましい。 Oxycarboxylic acids include oxycarboxylic acids and their salts. Examples of the oxycarboxylic acid include aliphatic oxyacids such as citric acid, gluconic acid, tartaric acid, glycolic acid, lactic acid, hydroacrylic acid, α-oxybutyric acid, glyceric acid, tartronic acid, malic acid, salicylic acid, and m-oxybenzoic acid. Examples thereof include aromatic oxyacids such as acid, p-oxybenzoic acid, gallic acid, mandelic acid and tropic acid. Examples of oxycarboxylic acid salts include alkali metal salts of oxycarboxylic acids (specifically, sodium salts, potassium salts, etc.), alkaline earth metal salts (specifically, calcium salts, barium salts, magnesium salts, etc.), etc. Can be mentioned. In particular, sodium bicarbonate and sodium L-tartrate are preferable from the standpoints of setting delay effect, availability, and cost.
凝結遅延剤は、１種又は２種以上を用いる場合、それぞれの凝結遅延剤の添加量が水硬性成分１００質量部に対して、好ましくは０．０１〜２．０質量部であり、より好ましくは０．１〜１．５質量部、さらに好ましくは０．２〜１．０質量部、特に好ましくは０．２５〜０．５質量部の範囲で用いることにより好適な流動性を得ることができる可使時間（ハンドリングタイム）を確保できることから好ましい。 When 1 type or 2 or more types of setting retarders are used, the addition amount of each setting retarder is preferably 0.01 to 2.0 parts by mass, more preferably 100 parts by mass of the hydraulic component. 0.1 to 1.5 parts by mass, more preferably 0.2 to 1.0 parts by mass, and particularly preferably 0.25 to 0.5 parts by mass can be used to obtain suitable fluidity. It is preferable because the pot life (handling time) can be secured.
凝結促進剤としては、公知の凝結を促進する成分を用いることができる。凝結遅延剤と併せて凝結促進剤を用いる場合、例えば、好適な凝結促進効果を有するリチウム塩を用いることが好ましい。リチウム塩の一例として、炭酸リチウム、塩化リチウム、硫酸リチウム、硝酸リチウム、水酸化リチウムなどの無機リチウム塩や、酢酸リチウム、酒石酸リチウム、リンゴ酸リチウム、クエン酸リチウムなどの有機酸有機リチウム塩などのリチウム塩を用いることができる。特に炭酸リチウムは、凝結促進効果、入手容易性及び価格の面から好ましい。 As the setting accelerator, a known component for promoting setting can be used. When using a setting accelerator together with a setting retarder, it is preferable to use, for example, a lithium salt having a suitable setting promoting effect. Examples of lithium salts include inorganic lithium salts such as lithium carbonate, lithium chloride, lithium sulfate, lithium nitrate, and lithium hydroxide, and organic acid organic lithium salts such as lithium acetate, lithium tartrate, lithium malate, and lithium citrate. Lithium salts can be used. In particular, lithium carbonate is preferable from the viewpoint of the setting acceleration effect, availability, and cost.
本発明の水硬性組成物が、凝結促進効果を必要とする場合には、上記リチウム塩に硫酸アルミニウム、硫酸カリウム、アルミン酸ナトリウム等の凝結促進成分を併用することが、更に凝結促進効果が発揮されることから、さらに好ましい。特に、本発明の水硬性組成物に対して凝結遅延剤と併せて凝結促進剤を用いる場合、好適な凝結促進効果を有するリチウム塩と硫酸アルミニウムとを併用することでより高い凝結促進効果を得ることができる。 When the hydraulic composition of the present invention requires a setting acceleration effect, it is possible to further increase the setting acceleration effect by using a combination of the lithium salt with a setting acceleration component such as aluminum sulfate, potassium sulfate, or sodium aluminate. Therefore, it is more preferable. In particular, when a setting accelerator is used in combination with a setting retarder for the hydraulic composition of the present invention, a higher setting acceleration effect is obtained by using a lithium salt having a preferable setting acceleration effect and aluminum sulfate in combination. be able to.
増粘剤は、ヒドロキシエチルメチルセルロースを含み、ヒドロキシエチルメチルセルロースを除く他のセルロース系、スターチエーテル等の化工澱粉系、蛋白質系、ラテックス系、及び水溶性ポリマー系などの増粘剤を併用して用いることができる。 Thickener contains hydroxyethyl methylcellulose, and uses other thickeners such as cellulose, excluding hydroxyethylmethylcellulose, modified starch such as starch ether, protein, latex, and water-soluble polymer. be able to.
増粘剤は、本発明の特性を損なわない範囲の添加量で添加することができ、水硬性成分１００質量部に対して、好ましくは０．００１〜２質量部、より好ましくは０．００５〜１．５質量部、さらに好ましくは０．０１〜１質量部、特に０．０５〜０．８質量部含むことが好ましい。増粘剤の添加量が多くなると、モルタル粘度が増加して流動性の低下を招く恐れがあるために上記の好ましい範囲で用いることが好ましい。 The thickener can be added in an addition amount within a range not impairing the properties of the present invention, and is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 100 parts by mass of the hydraulic component. It is preferable to include 1.5 parts by mass, more preferably 0.01 to 1 part by mass, particularly 0.05 to 0.8 parts by mass. When the addition amount of the thickener is increased, the mortar viscosity is increased and the fluidity may be lowered. Therefore, it is preferably used in the above preferred range.
本発明の水硬性組成物では、上記の成分のほかに、シリコーン系、アルコール系、ポリエーテル系などの合成物質又は鉱物油系、植物由来の天然物質など消泡剤や、有機系繊維や無機系繊維などの繊維成分や、有機質顔料や無機質顔料などの着色成分などを適宜選択して用いることができる。 In the hydraulic composition of the present invention, in addition to the above components, antifoaming agents such as silicone-based, alcohol-based, polyether-based synthetic materials or mineral oil-based, plant-derived natural materials, organic fibers and inorganic materials A fiber component such as a system fiber and a coloring component such as an organic pigment and an inorganic pigment can be appropriately selected and used.
本発明の水硬性組成物を構成する場合に、特に好適な成分構成は、アルミナセメント、ポルトランドセメント及び石膏からなる水硬性成分、アクリル共重合系の再乳化型樹脂粉末、特定の粒度構成を有する無機粉末、増粘剤及び凝結調整剤（凝結遅延剤、又は、凝結遅延剤と凝結促進剤）を含むものである。 In the case of constituting the hydraulic composition of the present invention, the particularly preferred component constitution has a hydraulic component comprising alumina cement, Portland cement and gypsum, an acrylic copolymer-based re-emulsifying resin powder, and a specific particle size constitution. It contains an inorganic powder, a thickener and a setting modifier (setting retarder, or set retarder and set accelerator).
また、本発明の水硬性組成物に各種顔料を配合し、着色した水硬性モルタル硬化体を得る場合、特に好適な成分構成は、白色アルミナセメント、白色ポルトランドセメント及び石膏からなる水硬性成分、アクリル共重合系の再乳化型樹脂粉末、特定の粒度構成を有する無機粉末、増粘剤、凝結調整剤（凝結遅延剤、又は、凝結遅延剤と凝結促進剤）及び顔料を含むものである。 In addition, when various pigments are blended in the hydraulic composition of the present invention to obtain a colored hydraulic mortar cured body, particularly suitable component constitution is a hydraulic component composed of white alumina cement, white Portland cement and gypsum, acrylic It contains a copolymer-based re-emulsifying resin powder, an inorganic powder having a specific particle size structure, a thickener, a setting regulator (setting retarder, or setting retarder and setting accelerator) and a pigment.
本発明の水硬性組成物では、水硬性成分、アクリル共重合系の再乳化型樹脂粉末、無機粉末、増粘剤及び凝結調整剤（凝結遅延剤、又は、凝結遅延剤と凝結促進剤）などを混合機で混合し、水硬性組成物のプレミックス粉体を得ることができる。 In the hydraulic composition of the present invention, a hydraulic component, an acrylic copolymer-based re-emulsifying resin powder, an inorganic powder, a thickener and a setting modifier (a setting retarder, or a setting retarder and a setting accelerator), etc. Can be mixed with a mixer to obtain a premix powder of the hydraulic composition.
本発明の水硬性組成物のプレミックス粉体は、所定量の水と混合・攪拌して、水硬性モルタルを製造することができ、その水硬性モルタルを硬化させて、水硬性モルタル硬化体を得ることができる。 The premix powder of the hydraulic composition of the present invention can be mixed and stirred with a predetermined amount of water to produce a hydraulic mortar. The hydraulic mortar is cured to obtain a cured hydraulic mortar. Can be obtained.
本発明の水硬性組成物は、水と混合・攪拌して水硬性モルタルを製造することができる。水硬性組成物に対する水の添加量を調整することにより、水硬性モルタルの流動性、可使時間、鏝塗り特性、保形性、水硬性モルタル硬化体の強度などを調整することができる。 The hydraulic composition of the present invention can be mixed and stirred with water to produce a hydraulic mortar. By adjusting the amount of water added to the hydraulic composition, the fluidity of the hydraulic mortar, pot life, glazing properties, shape retention, strength of the cured hydraulic mortar, and the like can be adjusted.
本発明の水硬性組成物を用いた水硬性モルタルは、水硬性組成物（Ｓ）と水（Ｗ）とを質量比（Ｗ／Ｓ）が、好ましくは０．１５〜０．４５の範囲、より好ましくは０．２０〜０．４０の範囲、さらに好ましくは、０．２５〜０．３５の範囲、特に好ましくは０．２８〜０．３２の範囲になるように配合して混練することが好ましい。 The hydraulic mortar using the hydraulic composition of the present invention has a mass ratio (W / S) between the hydraulic composition (S) and water (W) of preferably 0.15 to 0.45, More preferably, it is blended and kneaded so as to be in the range of 0.20 to 0.40, more preferably in the range of 0.25 to 0.35, and particularly preferably in the range of 0.28 to 0.32. preferable.
本発明で使用する水硬性組成物は、水と混合して調製した混練直後の水硬性モルタルのＪＩＳ Ｒ ５２０１（セメントの物理試験方法のフロー試験）の１５打フロー値が、好ましくは１００〜２７０ｍｍ、さらに好ましくは１２０〜２４０ｍｍ、特に好ましくは１５０〜２２０ｍｍに調整されていることが好ましい。良好な鏝塗り作業性と、優れたすり合わせ施工性と、施工後の良好な保形性とが得られ、ダレのない良好な仕上りの水硬性モルタル硬化体表面を得られやすいという理由のためである。 The hydraulic composition used in the present invention has a 15-stroke flow value of JIS R 5201 (flow test of physical test method for cement) of a hydraulic mortar immediately after kneading prepared by mixing with water, preferably 100 to 270 mm. More preferably, it is adjusted to 120 to 240 mm, particularly preferably 150 to 220 mm. Because it is easy to obtain the surface of a hardened mortar cured body that has good finish coating workability, excellent laying workability, good shape retention after construction, and good finish without sagging. is there.
さらに、本発明で使用する水硬性組成物は、水と混合して調製したのち６０分経過した水硬性モルタルのＪＩＳ Ｒ ５２０１（セメントの物理試験方法のフロー試験）の１５打フロー値が、好ましくは１００〜２７０ｍｍ、さらに好ましくは１２０〜２４０ｍｍ、特に好ましくは１５０〜２２０ｍｍに調整されていることが好ましい。水硬性モルタルを調製したのち充分な可使時間（ハンドリングタイム）を確保しながら、良好な鏝塗り作業性と、優れたすり合わせ施工性と、施工後の良好な保形性とが得られ、ダレのない良好な仕上りの水硬性モルタル硬化体表面を得られやすいという理由のためである。 Further, the hydraulic composition used in the present invention preferably has a 15-stroke flow value of JIS R 5201 (flow test of physical test method for cement) of a hydraulic mortar that has been prepared by mixing with water and 60 minutes have passed. Is preferably adjusted to 100 to 270 mm, more preferably 120 to 240 mm, and particularly preferably 150 to 220 mm. After preparing the hydraulic mortar, while ensuring sufficient pot life (handling time), good glazing workability, excellent laminating workability, and good shape retention after construction are obtained. This is because it is easy to obtain a surface of a cured hydraulic mortar body having no good finish.
本発明で使用する水硬性組成物は、水と混合して調製した水硬性モルタルについて、ＪＡＳＳ １５Ｍ−１０３に準拠したセルフレベリング材のフロー試験で測定したフロー値が、５５〜９０ｍｍ、好ましくは５８〜８５ｍｍ、より好ましくは６０〜８０ｍｍに調整されていることが、施工の容易さ及び適正な鏝塗り作業性が得られ、ダレのないモルタル施工体を得られやすいという理由により好ましい。フロー値が、９０ｍｍを超えると、構造物の下地表面に水硬性モルタルを鏝塗り施工した場合に、良好な保形性が得られずモルタル施工体にダレを生じることがあることから、フロー値は９０ｍｍ以下であることが好ましい。 The hydraulic composition used in the present invention has a flow value measured by a flow test of a self-leveling material in accordance with JASS 15M-103 for a hydraulic mortar prepared by mixing with water, 55 to 90 mm, preferably 58 It is preferable that the thickness is adjusted to ˜85 mm, more preferably 60 to 80 mm, because the ease of construction and proper glazing workability can be obtained, and a mortar construction body without sagging is easily obtained. When the flow value exceeds 90 mm, when hydraulic mortar is applied to the base surface of the structure, good shape retention may not be obtained and the mortar construction body may be sagged. Is preferably 90 mm or less.
水硬性モルタルをコンクリートなどの構造物の下地表面に鏝塗り施工する場合の施工厚さは、下地表面（施工面）の凹凸状態などによって異なり、個々の施工現場毎に適宜厚さを設定することができる。具体的には、下地表面（施工面）の最も凸部分上面を基準にして、好ましくは施工厚さ０．１ｍｍ〜２０ｍｍの範囲、より好ましくは施工厚さ０．１１ｍｍ〜１５ｍｍの範囲、さらに好ましくは施工厚さ０．１２ｍｍ〜１０ｍｍの範囲、特に好ましくは施工厚さ０．１５ｍｍ〜５ｍｍの範囲で鏝塗り施工することが好ましい。特に本発明の水硬性組成物は、施工厚さが上記の好ましい範囲で鏝塗り施工することにより、最も好適な作業性を安定して得ることができる。 The construction thickness when applying hydraulic mortar to the foundation surface of structures such as concrete varies depending on the unevenness of the foundation surface (construction surface), etc., and the thickness should be set appropriately for each construction site Can do. Specifically, on the basis of the most convex upper surface of the base surface (construction surface), the construction thickness is preferably in the range of 0.1 mm to 20 mm, more preferably in the range of the construction thickness of 0.11 mm to 15 mm, more preferably Is preferably applied in a range of 0.12 mm to 10 mm, particularly preferably 0.15 mm to 5 mm. In particular, the hydraulic composition of the present invention can stably obtain the most suitable workability by applying the varnishing within a preferable range of the construction thickness.
また、水硬性モルタルをコンクリートなどの構造物の下地表面の凹部や亀裂に鏝塗り充填施工する場合の施工深さは、特に限定されるものではなく、個々の施工現場毎に適宜塗り付け深さを設定することができる。例えば、下地表面（施工面）を基準にして、好ましくは施工深さ３０ｍｍ以下、より好ましくは施工深さ１５ｍｍ以下、さらに好ましくは施工深さ１０ｍｍ以下、特に好ましくは施工深さ５ｍｍ以下の充填部に鏝塗り施工することが好ましい。特に本発明の水硬性組成物は、施工深さが上記の好ましい範囲で鏝塗り施工することにより、好適な作業性と良好な表面仕上がり性とを得ることができる。 In addition, the installation depth when filling and filling hydraulic mortar to the recesses and cracks on the ground surface of structures such as concrete is not particularly limited, and the appropriate application depth for each construction site Can be set. For example, on the basis of the base surface (construction surface), the filling portion is preferably a construction depth of 30 mm or less, more preferably a construction depth of 15 mm or less, further preferably a construction depth of 10 mm or less, particularly preferably a construction depth of 5 mm or less. It is preferable to apply a varnish to the surface. In particular, the hydraulic composition of the present invention can obtain suitable workability and good surface finish by performing the glazing operation in the above-mentioned preferable range of the construction depth.
本発明の水硬性組成物は、水硬性組成物と、水とを混練して調製した水硬性モルタルを、鏝を用いて構造物の下地表面に鏝塗り施工するための水硬性組成物として用いることが好ましい。また、その場合、本発明の水硬性組成物は、特に鏝を用いて構造物の下地表面に鏝塗りすり合わせ施工するための水硬性組成物として用いることが好ましい。 The hydraulic composition of the present invention is used as a hydraulic composition for applying a hydraulic mortar prepared by kneading a hydraulic composition and water to a base surface of a structure using a scissors. It is preferable. In that case, the hydraulic composition of the present invention is preferably used as a hydraulic composition for applying and rubbing the base surface of the structure using a crease.
本明細書では、本発明の水硬性組成物を含む水硬性モルタルを、構造物の下地表面に施工し、硬化させた部分のことを、「モルタル硬化体」という。モルタル硬化体は、構造物の下地表面の少なくとも一部に施工することができる。また、上述のように、構造物の下地表面の凹部や亀裂に鏝塗り充填施工するだけでなく、それ以外の下地表面全体にわたって層状にモルタル硬化体を設けることもできる。本発明の水硬性組成物を用いてモルタル硬化体を有する構造体を得る場合には、好適な作業性と良好な表面仕上がり性とを得ることができる。 In this specification, the part which applied and hardened the hydraulic mortar containing the hydraulic composition of this invention on the foundation | substrate surface of a structure is called "mortar hardening body." The mortar cured body can be applied to at least a part of the underlying surface of the structure. In addition, as described above, not only filling and filling the recesses and cracks on the ground surface of the structure, but also the mortar cured body can be provided in a layered manner over the entire ground surface. When obtaining the structure which has a mortar hardening body using the hydraulic composition of this invention, suitable workability | operativity and favorable surface finish can be obtained.
本発明の水硬性組成物用いた水硬性モルタルは、良好な施工性を確保するために充分な可使時間（ハンドリングタイム）を有している。水硬性モルタルの可使時間は、水硬性モルタル調製から好ましくは６０分間であり、さらに好ましくは９０分間であり、特に好ましくは１２０分間である。本発明の水硬性組成物を用いた水硬性モルタルは、前記の好ましい可使時間（ハンドリングタイム）で、良好な鏝塗り作業性（鏝切れ、鏝送り、鏝伸び、鏝離れ）を安定して得ることができる。 The hydraulic mortar using the hydraulic composition of the present invention has sufficient pot life (handling time) to ensure good workability. The pot life of the hydraulic mortar is preferably 60 minutes from the preparation of the hydraulic mortar, more preferably 90 minutes, and particularly preferably 120 minutes. The hydraulic mortar using the hydraulic composition of the present invention has the above-mentioned preferable pot life (handling time) and stably has a good wrinkle coating workability (cutting, wrinkle feeding, wrinkle elongation, wrinkle separation). Can be obtained.
本発明の水硬性組成物用いた水硬性モルタルは、施工場所の温度や湿度の条件にもよるが、施工終了後０．５時間〜２時間の間に硬化を開始し、硬化の進行に伴って硬化体の表面硬度が上昇し、硬化体表面の含水量が低下する。水硬性モルタル硬化体表面のショア硬度は、水硬性モルタルを打設してモルタル表面を鏝仕上げしてから、好ましくは６時間後に５以上、より好ましくは６時間後に５．５以上、さらに好ましくは５時間後に５以上、特に好ましくは４時間後に２以上のショア硬度を有し、モルタル施工（打設・鏝仕上げ）が終了した後、速やかに硬化が進行することによって本発明の水硬性組成物用いたモルタル硬化体を有するコンクリート構造体を短期間に形成させることができる。 The hydraulic mortar using the hydraulic composition of the present invention starts curing within 0.5 to 2 hours after the completion of construction, depending on the temperature and humidity conditions at the construction site, and with the progress of curing. As a result, the surface hardness of the cured body increases and the moisture content on the surface of the cured body decreases. The shore hardness of the surface of the cured hydraulic mortar is preferably 5 or more after 6 hours, more preferably 5.5 or more after 6 hours, more preferably 6 hours after placing the hydraulic mortar and finishing the surface of the mortar. The hydraulic composition of the present invention has a shore hardness of 5 or more after 5 hours, particularly preferably 2 or more after 4 hours, and after the mortar construction (laying and finishing) is completed, the curing proceeds rapidly. The concrete structure which has the used mortar hardening body can be formed in a short time.
本発明の水硬性組成物用いた水硬性モルタル硬化体の曲げ強さは、材齢７日のモルタル硬化体では、好ましくは２Ｎ／ｍｍ２以上、さらに好ましくは２．５Ｎ／ｍｍ２以上、特に好ましくは３Ｎ／ｍｍ２以上の曲げ強さを発現する。 Bending strength of the hydraulic composition used was hydraulic mortar cured body of the present invention, in mortar cured body at the age of 7 days, preferably from 2N / mm 2 or more, more preferably 2.5 N / mm 2 or more, especially Preferably, a bending strength of 3 N / mm 2 or more is expressed.
また、本発明の水硬性組成物用いた水硬性モルタル硬化体の圧縮強さは、材齢７日のモルタル硬化体では、好ましくは８Ｎ／ｍｍ２以上、さらに好ましくは１０Ｎ／ｍｍ２以上、特に好ましくは１２Ｎ／ｍｍ２以上の圧縮強さを発現する。 Moreover, the compressive strength of the hydraulic mortar cured body using the hydraulic composition of the present invention is preferably 8 N / mm 2 or more, more preferably 10 N / mm 2 or more, particularly in a 7-day mortar cured body. Preferably, a compressive strength of 12 N / mm 2 or more is expressed.
本発明の水硬性組成物は、速硬性・速乾性に優れた特性を有しており、速やかに良好な硬化状態及び表面乾燥状態を得ることができ、次工程への移行が翌日〜３日後には可能となる。 The hydraulic composition of the present invention has characteristics excellent in fast curing and quick drying, can quickly obtain a good cured state and a surface dried state, and the transition to the next step is from the next day to the third day. It will be possible later.
水硬性モルタル硬化体の長さ変化は、材齢７日のモルタル硬化体で、好ましくは０〜−０．１％、さらに好ましくは０〜−０．０７％、特に好ましくは０〜−０．０５％の範囲であり、材齢２８日のモルタル硬化体で、好ましくは０〜−０．１５％、さらに好ましくは０〜−０．１０％、特に好ましくは０〜−０．０５％の範囲であり、前記の長さ変化の特性をもたらす水硬性組成物が、硬化体自体のクラック発生を防止でき、さらに下地との間で高い接着力を恒久的に保持できることから好ましい。また、上記の長さ変化の範囲を外れた場合には、モルタル硬化体の硬化収縮によってクラックが生じたり、モルタル硬化体と下地との接着面が剥離したりすることがあるため好ましくない。 The change in the length of the cured hydraulic mortar is a mortar cured product with a material age of 7 days, preferably 0 to -0.1%, more preferably 0 to -0.07%, and particularly preferably 0 to -0. It is in the range of 05%, and is a hardened mortar body at the age of 28 days, preferably 0 to -0.15%, more preferably 0 to -0.10%, particularly preferably 0 to -0.05%. The hydraulic composition that provides the above-mentioned characteristics of length change is preferable because it can prevent cracking of the cured body itself and can maintain a high adhesive force with the base permanently. In addition, when the range of the length change is out of the range, it is not preferable because a crack may be generated due to curing shrinkage of the mortar cured body or an adhesive surface between the mortar cured body and the base may be peeled off.
本発明の水硬性組成物と水と混合して調製した水硬性モルタルは、左官鏝などを用いて各種建築物の床面、壁面及び天井面など、構造物の下地表面に塗付け施工することができる。本発明の水硬性モルタル硬化体の上面には、各種タイルなどの仕上げ層を適宜選択して施工することができる。 The hydraulic mortar prepared by mixing the hydraulic composition of the present invention and water should be applied to the foundation surface of the structure, such as floors, walls and ceilings of various buildings, using plasterers etc. Can do. On the upper surface of the hydraulic mortar cured body of the present invention, a finishing layer such as various tiles can be appropriately selected and applied.
本発明の水硬性組成物は、速硬性・速乾性に優れるアルミナセメントを含む水硬性成分と、樹脂成分とを含む水硬性組成物である。本発明の水硬性組成物と、水とを混練して得られる水硬性モルタルは、ハンドリング性（可使時間）が長く、良好な鏝塗り作業性を有しながら、所定の可使時間が経過したのちに速やかに硬化が進行して、早期強度発現が良好で、優れた寸法安定性を有するモルタル硬化体を得ることができるものである。本発明の水硬性組成物を用いることにより、左官職人の施工性をより向上させるとともに、短工期のモルタル施工を可能とし、耐久性・耐候性に優れたモルタル硬化体を提供するものである。 The hydraulic composition of the present invention is a hydraulic composition containing a hydraulic component containing an alumina cement excellent in quick hardening and quick drying and a resin component. The hydraulic mortar obtained by kneading the hydraulic composition of the present invention and water has a long handling property (usable time) and a good potting workability, while a predetermined working time has elapsed. Thereafter, the curing proceeds promptly, and a mortar cured body having good early strength development and excellent dimensional stability can be obtained. By using the hydraulic composition of the present invention, it is possible to further improve the workability of plasterers, enable mortar construction in a short construction period, and provide a cured mortar body excellent in durability and weather resistance.
また、本発明の水硬性組成物は、上記性質を有するため、壁などのひび割れや窪みを補修するためのパテ材としても好ましく用いることができる。 Moreover, since the hydraulic composition of this invention has the said property, it can be preferably used also as a putty material for repairing the cracks and dents, such as a wall.
以下、本発明について実施例に基づいて詳細に説明する。但し、本発明は下記の実施例により制限されるものでない。 Hereinafter, the present invention will be described in detail based on examples. However, the present invention is not limited by the following examples.
（特性の評価方法） (Characteristic evaluation method)
１）１５打フロー値（ｍｍ）：
１５打フロー値は、混練した水硬性モルタルについて、混練直後、混練３０分後、混練６０分後にＪＩＳ Ｒ ５２０１ セメントの物理試験方法のフロー試験に準じて測定した。
1) 15 stroke flow value (mm):
The 15-stroke flow value was measured for the kneaded hydraulic mortar immediately after kneading, after 30 minutes of kneading, and after 60 minutes of kneading, according to the flow test of the physical test method of JIS R 5201 cement.
２）ＳＬフロー値（ｍｍ）：
ＳＬフロー値は、混練した水硬性モルタルについて、ＪＡＳＳ １５Ｍ−１０３に記載の方法に準拠して測定した。
2) SL flow value (mm):
The SL flow value was measured for the kneaded hydraulic mortar according to the method described in JASS 15M-103.
３）鏝塗り作業性 ：鏝塗り作業性［１］は、以下の説明のように、鏝塗り作業性［１］〜［３］のように行った。 3) Painting workability: The paintworking workability [1] was performed as the paintworking workability [1] to [3] as described below.
３―１）鏝塗り作業性［１］の評価
室温２０℃、相対湿度６５％の条件下で、ＪＩＳ Ａ ５３０４舗装用コンクリート平板に規定する３００ｍｍ×３００ｍｍ×６０ｍｍのコンクリート平板にモルタルを約３〜５ｍｍの厚みで塗り付けて、鏝塗り作業時のモルタルの送り、伸び、切れ及び離れの５項目について、水硬性モルタルを調製した直後、３０分後、６０分後に評価を行った（鏝塗り作業性［１］）。評価は、以下のように行った。その結果を表２に示す。表２の所定の欄の３つの数字は、左から、混練直後、３０分後及び６０分後の評価を示す。
（ｉ）鏝切れ（鏝残り）の評価
４：大変良好、３：良好、２：実用上問題なし、１：実用上問題あり、０：実用不可、の５段階で行う。
（ｉｉ）鏝送り（重さ）の評価
４：大変良好、３：良好、２：実用上問題なし、１：実用上問題あり、０：実用不可、の５段階で行った。
（ｉｉｉ）鏝伸び（塗り面積）の評価
４：大変良好、３：良好、２：実用上問題なし、１：実用上問題あり、０：実用不可、の５段階で行った。
（ｉｖ）鏝離れ（塗面の仕上げ易さ）の評価
４：大変良好、３：良好、２：実用上問題なし、１：実用上問題あり、０：実用不可、の５段階で行った。
3-1) Evaluation of wrinkle coating workability [1] Under conditions of room temperature of 20 ° C. and relative humidity of 65%, mortar is added to a concrete plate of 300 mm × 300 mm × 60 mm specified in a concrete plate for pavement JIS A 5304. The coating was applied at a thickness of 5 mm, and the mortar feed, elongation, breakage, and separation of the mortar at the time of the glazing operation were evaluated immediately after preparing the hydraulic mortar, 30 minutes, and 60 minutes later (spreading operation) Sex [1]). Evaluation was performed as follows. The results are shown in Table 2. Three numbers in a predetermined column of Table 2 indicate evaluations from the left, immediately after kneading, after 30 minutes, and after 60 minutes.
(I) Evaluation of fraying (remaining wrinkles) The evaluation is performed in five stages: 4: very good, 3: good, 2: no practical problem, 1: practical problem, 0: impractical.
(Ii) Evaluation of wrinkle feed (weight) It was performed in five stages: 4: very good, 3: good, 2: no practical problem, 1: practical problem, 0: impractical.
(Iii) Evaluation of wrinkle elongation (coating area) 4: Very good, 3: Good, 2: No practical problem, 1: Practical problem, 0: Not practical
(Iv) Evaluation of wrinkle separation (ease of finishing the coated surface) 4: Very good, 3: Good, 2: No problem in practical use, 1: Problem in practical use, 0: Not practical.
３―２）鏝塗り作業性［２］：「すり合わせ性」（すり合わせ部の形成）の評価
コンクリート平板の表面にモルタルを約１ｍｍの厚みで塗り付けたのち、左官鏝を用いてすりあわせ部を形成し、鏝塗りすり合わせ性について評価を行った（鏝塗り作業性［２］）。評価は、以下のように３段階で行った。
○：良好、△：実用上問題あり、×：実用不可。
3-2) Evaluation of wrinkle coating workability [2]: Evaluation of “grindability” (formation of grinded portion) After applying mortar to the surface of a concrete flat plate with a thickness of about 1 mm, use a plasterer to grind the grinded portion. It formed and evaluated about the smearing | coating process property (coating workability [2]). Evaluation was performed in three stages as follows.
○: Good, Δ: Practical problem, ×: Impractical.
３―３）鏝塗り作業性［３］：「保形性」（仕上り面の保形性：ダレによる変形）の評価
保形性の評価として、３ｍｍの段差を形成したコンクリート平板の段差部分にモルタルを塗りつけてスムースな仕上り面を形成した後、６０分後にスムースな仕上がり面が保たれているかを評価した（鏝塗り作業性［３］）。評価は、以下のように３段階で行った。
○：良好、△：実用上問題あり、×：実用不可。
3-3) Evaluation of lacquering workability [3]: Evaluation of “shape retention” (shape retention of the finished surface: deformation due to sagging) As an evaluation of shape retention, it is applied to the step portion of a concrete flat plate formed with a 3 mm step. After applying a mortar to form a smooth finished surface, 60 minutes later, it was evaluated whether the smooth finished surface was maintained (spreading workability [3]). Evaluation was performed in three stages as follows.
○: Good, Δ: Practical problem, ×: Impractical.
４）硬化体表面のショア硬度：
水硬性モルタル打設後からの所定の経過時間において、水硬性モルタルの硬化した表面の硬度をスプリング式硬度計タイプＤ型（（株）上島製作所製）を用いて、任意の３〜５カ所の表面硬度を測定し、そのスプリング式硬度計タイプＤ型のゲージの読み取り値の平均値をその時間の表面硬度とした。
4) Shore hardness of the cured body surface:
Using a spring type hardness tester type D type (manufactured by Ueshima Seisakusho Co., Ltd.), the hardness of the hardened surface of the hydraulic mortar is measured at an arbitrary 3 to 5 locations in a predetermined elapsed time after the placement of the hydraulic mortar. The surface hardness was measured, and the average value of the reading values of the spring type hardness tester type D gauge was defined as the surface hardness at that time.
５）曲げ強さ（Ｎ／ｍｍ２）及び圧縮強さ（Ｎ／ｍｍ２）：
水硬性モルタル硬化体の曲げ強さ及び圧縮強さを測定するための試験に用いた試験体の大きさは、断面が４０ｍｍ平方、長さが１６０ｍｍの角柱の試験体（４ｃｍ×４ｃｍ×１６ｃｍ）であり、ＪＩＳ Ｒ ５２０１に準じて材齢１日、材齢７日及び材齢２８日の曲げ強さ並びに圧縮強さを測定した。
5) Bending strength (N / mm 2 ) and compressive strength (N / mm 2 ):
The size of the test body used in the test for measuring the bending strength and compressive strength of the cured hydraulic mortar was a square column test body (4 cm × 4 cm × 16 cm) having a cross section of 40 mm square and a length of 160 mm. In accordance with JIS R 5201, the bending strength and compressive strength of material age 1 day, material age 7 days and material age 28 days were measured.
６）接着強さの評価：
水硬性モルタル硬化体の接着強さは、ＪＩＳ Ａ ６９１６の付着強さ試験方法に準拠して測定した。ＪＩＳ Ａ ５３０４舗装用コンクリート平板に規定する３００ｍｍ×３００ｍｍ×６０ｍｍのコンクリート平板に、水硬性モルタルを約３〜５ｍｍの厚みで塗り付けて層状の水硬性モルタル硬化体を設けた。材齢７日後及び材齢２８日後の水硬性モルタル硬化体に付着面が４０ｍｍ×４０ｍｍの正方形の鋼製ジグを接着剤にて５ヶ所に接着させた。接着剤が硬化した後、鋼製ジグの周囲に沿ってコンクリート平板に達するまでダイヤモンドカッターなどで切り込みを入れ、鋼製ジグを建研式接着試験機に取り付けて、徐々に引張り荷重を加え、破断するまで加圧を行った。破断するまでの最大荷重を最大引張り荷重とし、５ヶ所の平均値を接着強さとして評価した。
6) Evaluation of adhesive strength:
The adhesion strength of the cured hydraulic mortar was measured according to the adhesion strength test method of JIS A 6916. A hydraulic mortar was applied in a thickness of about 3 to 5 mm on a 300 mm × 300 mm × 60 mm concrete plate defined in a JIS A 5304 pavement concrete plate to provide a layered hydraulic mortar cured body. A square steel jig having an attachment surface of 40 mm × 40 mm was adhered to five places of the hardened hydraulic mortar after 7 days of age and 28 days of age with an adhesive. After the adhesive has hardened, cut with a diamond cutter etc. until it reaches the concrete flat plate along the circumference of the steel jig, attach the steel jig to the Kenken-type adhesion tester, gradually apply a tensile load, and break Pressurization was performed until The maximum load until breakage was evaluated as the maximum tensile load, and the average value at 5 locations was evaluated as the adhesive strength.
７）長さ変化：
水硬性モルタル硬化体の長さ変化の測定試験については、ＪＩＳ Ａ １１２９−１に規定するコンタクトゲージ法に準じて行った。
7) Length change:
About the measurement test of the length change of a hydraulic mortar hardened | cured material, it carried out according to the contact gauge method prescribed | regulated to JISA1129-1.
（使用材料）：
水硬性組成物は、以下の材料を使用して調製した。すなわち、下記の原材料を表１又は表２に示す配合割合で混合した水硬性組成物を使用した。
・アルミナセメントＡ ： フォンジュ、ケルネオス社製、ブレーン比表面積３１００ｃｍ２／ｇ。
・アルミナセメントＢ ： ターナルホワイト（白色アルミナセメント）、ケルネオス社製、ブレーン比表面積４１００ｃｍ２／ｇ。
・ポルトランドセメントＡ ： 早強セメント、宇部三菱セメント社製、ブレーン比表面積４５００ｃｍ２／ｇ。
・ポルトランドセメントＢ ： 白色セメント、太平洋セメント社製。
・石膏 ： ＩＩ型無水石膏、セントラル硝子社製、ブレーン比表面積３４６０ｃｍ２／ｇ。
・樹脂成分 ： アクリル酸エステル／メタアクリル酸エステルの共重合体、１次粒子がポリビニルアルコールの水溶性保護コロイドで被覆された再乳化型樹脂粉末、ニチゴー・モビニール社製、ＤＭ７１００Ｐ。
・無機微粉末 ： 石灰石微粉末（炭酸カルシウム微粉末）、有恒鉱業社製、ＴＭ−１号、ブレーン比表面積４８３０ｃｍ２／ｇ、１００メッシュ篩（篩目開き＝１５０μｍ）全通。
・細骨材Ａ ： ６号珪砂、宇部サンド社製。（粒度分布を表３に示す。）
・細骨材Ｂ ： ５号珪砂、宇部サンド社製。（粒度分布を表３に示す。）
・凝結遅延剤Ａ ： Ｌ−酒石酸ナトリウム、扶桑化学工業社製。
・凝結遅延剤Ｂ ： 重炭酸ナトリウム、東ソー社製。
・増粘剤 ： ＭＥ２５０Ｔ、松本油脂社製。
・流動化剤 ： ポリカルボン酸系流動化剤、花王社製。
(Materials used):
The hydraulic composition was prepared using the following materials. That is, the hydraulic composition which mixed the following raw material with the mixture ratio shown in Table 1 or Table 2 was used.
Alumina cement A: Fondue, manufactured by Kerneos, Blaine specific surface area 3100 cm 2 / g.
Alumina cement B: Turnal white (white alumina cement), manufactured by Kerneos, Blaine specific surface area 4100 cm 2 / g.
Portland cement A: Hayashi Cement, manufactured by Ube Mitsubishi Cement Co., Ltd., Blaine specific surface area of 4500 cm 2 / g.
Portland cement B: White cement, Taiheiyo Cement.
Gypsum: Type II anhydrous gypsum, manufactured by Central Glass Co., Ltd., Blaine specific surface area of 3460 cm 2 / g.
Resin component: A copolymer of acrylic ester / methacrylic ester, re-emulsifying resin powder in which primary particles are coated with a water-soluble protective colloid of polyvinyl alcohol, DM7100P, manufactured by Nichigo Mobile.
-Inorganic fine powder: Limestone fine powder (calcium carbonate fine powder), manufactured by Arihei Mining Co., Ltd., TM-1, No. Blaine specific surface area 4830 cm 2 / g, 100 mesh sieve (mesh opening = 150 μm).
-Fine aggregate A: No. 6 silica sand, manufactured by Ube Sand Co., Ltd. (The particle size distribution is shown in Table 3.)
-Fine aggregate B: No. 5 silica sand, manufactured by Ube Sand Co., Ltd. (The particle size distribution is shown in Table 3.)
-Setting retarder A: L-sodium tartrate, manufactured by Fuso Chemical Industries.
-Setting retarder B: sodium bicarbonate, manufactured by Tosoh Corporation.
-Thickener: ME250T, manufactured by Matsumoto Yushi Co., Ltd.
-Fluidizer: Polycarboxylic acid fluidizer, manufactured by Kao Corporation.
（水硬性組成物のモルタル調製）
表１に示す配合割合で水硬性組成物を調製し、水硬性組成物１００質量部に対して表１に示す所定量の水を配合し、回転数１１００ｒｐｍのハンドミキサーを用いて３分間混練して、水硬性モルタルを調製した。
(Preparation of mortar for hydraulic composition)
A hydraulic composition is prepared at a blending ratio shown in Table 1, a predetermined amount of water shown in Table 1 is blended with 100 parts by mass of the hydraulic composition, and kneaded for 3 minutes using a hand mixer with a rotational speed of 1100 rpm. A hydraulic mortar was prepared.
[実施例１〜４、比較例１〜４]
表１に示す成分を配合した水硬性組成物を用いて水硬性モルタルを調製した。モルタルの流動性等の性状、鏝塗り作業性及び硬化特性を評価した結果を表２に示す。
[Examples 1-4, Comparative Examples 1-4]
A hydraulic mortar was prepared using a hydraulic composition containing the components shown in Table 1. Table 2 shows the results of evaluation of properties such as fluidity of mortar, glazing workability and curing characteristics.
（１）アルミナセメント、ポルトランドセメント及び無水石膏からなる水硬性成分と、粒子径１５０μｍを超える粒子を含む細骨材を用いた比較例１及び２の場合、左官鏝を用いたすり合わせ施工で良好なすり合わせ性は得られなかった。
（２）水硬性成分として早強セメントを用い、細骨材を用いず石灰石微粉末を使用した比較例３の場合、モルタルを調製・施工後、４時間では硬化が進行しておらず、ショア硬度を測定することができなかった。
（３）アルミナセメント、ポルトランドセメント及び無水石膏からなる水硬性成分と、石灰石微粉末細骨材と、流動化剤とを用いた比較例４の場合、速硬性、鏝作業性及びすり合わせ施工性について優れた特性を示したが、水硬性モルタルは流動性に富んでいるために、施工した水硬性モルタルが、すり合わせ施工した直後の形状を完全に保持することができなかった。
（４）アルミナセメント、ポルトランドセメント及び無水石膏からなる水硬性成分と、粒子径１５０μｍを超える粒子を含まない石灰石微粉末を用い、流動化剤を用いなかった実施例１及び２の場合、速硬性、鏝作業性及びすり合わせ施工性について優れた特性を示し、すり合わせ施工した水硬性モルタルの保形性についても良好であった。また、水硬性モルタル硬化体は、曲げ強さ、圧縮強さ及び接着強さについて優れた特性を示し、特に長さ変化においては、材齢７日及び材齢２８日の両方で−０．０５〜０の範囲の値であり、優れた寸法安定性を有していた。さらに、実施例２の水硬性組成物の場合、実施例３及び４に示すように、試験温度３５℃の高温条件や試験温度５℃の低温条件においても優れた鏝塗り作業性を得ることができた。
(1) In the case of Comparative Examples 1 and 2 using a hydraulic component composed of alumina cement, Portland cement, and anhydrous gypsum and fine aggregate containing particles having a particle diameter of more than 150 μm, it is good in a laminating construction using a plasterer. The grindability was not obtained.
(2) In the case of Comparative Example 3 using early strong cement as a hydraulic component and using fine limestone powder without using fine aggregates, curing did not progress in 4 hours after mortar was prepared and applied. Hardness could not be measured.
(3) In the case of Comparative Example 4 using a hydraulic component composed of alumina cement, Portland cement, and anhydrous gypsum, fine limestone fine aggregate, and a fluidizing agent, rapid curing, dredging workability, and laying workability Although excellent characteristics were exhibited, the hydraulic mortar was rich in fluidity, so that the applied hydraulic mortar could not completely retain the shape immediately after the rubbed construction.
(4) In the case of Examples 1 and 2 in which a hydraulic component composed of alumina cement, Portland cement and anhydrous gypsum and limestone fine powder not containing particles having a particle diameter of more than 150 μm were used and no fluidizing agent was used In addition, it showed excellent characteristics with respect to the dredging workability and the laminating workability, and the shape retention of the hydraulic mortar subjected to the laminating work was also good. Further, the cured hydraulic mortar exhibits excellent properties with respect to bending strength, compressive strength, and adhesive strength, and in particular, when the length is changed, it is -0.05 at both 7 days of age and 28 days of age. The value was in the range of ˜0 and had excellent dimensional stability. Furthermore, in the case of the hydraulic composition of Example 2, as shown in Examples 3 and 4, it is possible to obtain excellent glazing workability even under a high temperature condition of a test temperature of 35 ° C. and a low temperature condition of a test temperature of 5 ° C. did it.
１０ 床レベル
１１ 構造物
１４ 段差
１５ 凸部
２１ａ 水硬性モルタル硬化体（すり合わせ仕上げ）
10
Claims (9)
前記水硬性成分が、アルミナセメント、ポルトランドセメント及び石膏の合計を１００質量部とした場合、アルミナセメント４０〜５０質量部、ポルトランドセメント２５〜４０質量部及び石膏１７〜２７質量部であり、
前記無機粉末が、石灰石微粉末であり、水硬性成分１００質量部に対して石灰石微粉末２１０〜２５０質量部であり、
石灰石微粉末の粉末度（ブレーン比表面積）が、３，０００〜５，０００ｃｍ ２ ／ｇであり、
前記樹脂成分が、再乳化型樹脂粉末であり、水硬性成分１００質量部に対して再乳化型樹脂粉末５〜８質量部であり、
水硬性組成物と水とを混合・混練して調製した水硬性モルタルについて、ＪＡＳＳ １５Ｍ−１０３に準拠したフロー試験で測定したフロー値が、５５〜９０ｍｍであることを特徴とする水硬性組成物。 A hydraulic composition comprising a hydraulic component made of alumina cement , Portland cement and gypsum , a resin component, and an inorganic powder, and free of fine aggregate and fluidizing agent,
When the hydraulic component is 100 parts by mass of the total of alumina cement, Portland cement and gypsum, 40 to 50 parts by mass of alumina cement, 25 to 40 parts by mass of Portland cement and 17 to 27 parts by mass of gypsum,
The inorganic powder is limestone fine powder, and limestone fine powder is 210 to 250 parts by mass with respect to 100 parts by mass of the hydraulic component,
The fineness of limestone fine powder (Blaine specific surface area) is 3,000 to 5,000 cm 2 / g,
The resin component is a re-emulsifying resin powder, and the re-emulsifying resin powder is 5 to 8 parts by mass with respect to 100 parts by mass of the hydraulic component.
A hydraulic composition characterized in that a hydraulic mortar prepared by mixing and kneading a hydraulic composition and water has a flow value measured by a flow test in accordance with JASS 15M-103 of 55 to 90 mm. .
凝結遅延剤が、重炭酸ナトリウム及びＬ−酒石酸ナトリウムから選ばれる少なくとも１種以上である、請求項１〜３のいずれか１項に記載の水硬性組成物。 The hydraulic composition according to any one of claims 1 to 3, wherein the setting retarder is at least one selected from sodium bicarbonate and sodium L-tartrate.
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