JP2007001802A - Corrosion resistant composite, and method of manufacturing the same - Google Patents
Corrosion resistant composite, and method of manufacturing the same Download PDFInfo
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- JP2007001802A JP2007001802A JP2005183175A JP2005183175A JP2007001802A JP 2007001802 A JP2007001802 A JP 2007001802A JP 2005183175 A JP2005183175 A JP 2005183175A JP 2005183175 A JP2005183175 A JP 2005183175A JP 2007001802 A JP2007001802 A JP 2007001802A
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- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 4
- 238000005260 corrosion Methods 0.000 title claims abstract 5
- 230000007797 corrosion Effects 0.000 title claims abstract 5
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 239000011398 Portland cement Substances 0.000 claims abstract description 23
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 21
- 239000004567 concrete Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000002734 clay mineral Substances 0.000 claims abstract description 14
- 239000006185 dispersion Substances 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 14
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 14
- 239000000057 synthetic resin Substances 0.000 claims abstract description 14
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 5
- 239000010801 sewage sludge Substances 0.000 claims abstract description 5
- 239000010802 sludge Substances 0.000 claims abstract description 5
- 239000002699 waste material Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 39
- 239000010881 fly ash Substances 0.000 claims description 9
- 239000002956 ash Substances 0.000 claims description 8
- WSNJABVSHLCCOX-UHFFFAOYSA-J trilithium;trimagnesium;trisodium;dioxido(oxo)silane;tetrafluoride Chemical compound [Li+].[Li+].[Li+].[F-].[F-].[F-].[F-].[Na+].[Na+].[Na+].[Mg+2].[Mg+2].[Mg+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WSNJABVSHLCCOX-UHFFFAOYSA-J 0.000 claims description 4
- 239000002253 acid Substances 0.000 abstract description 24
- 230000008961 swelling Effects 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
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- 239000004568 cement Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 239000000835 fiber Substances 0.000 description 7
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- 239000007787 solid Substances 0.000 description 7
- 239000000839 emulsion Substances 0.000 description 6
- 239000002657 fibrous material Substances 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 239000003431 cross linking reagent Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229940043430 calcium compound Drugs 0.000 description 4
- 150000001674 calcium compounds Chemical class 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- 229910000278 bentonite Inorganic materials 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 3
- -1 calcium silicate hydrates Chemical class 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- NNJPGOLRFBJNIW-HNNXBMFYSA-N (-)-demecolcine Chemical compound C1=C(OC)C(=O)C=C2[C@@H](NC)CCC3=CC(OC)=C(OC)C(OC)=C3C2=C1 NNJPGOLRFBJNIW-HNNXBMFYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 125000003504 2-oxazolinyl group Chemical group O1C(=NCC1)* 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920002978 Vinylon Polymers 0.000 description 2
- 150000001339 alkali metal compounds Chemical class 0.000 description 2
- KLIYQWXIWMRMGR-UHFFFAOYSA-N buta-1,3-diene;methyl 2-methylprop-2-enoate Chemical compound C=CC=C.COC(=O)C(C)=C KLIYQWXIWMRMGR-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
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- 239000006028 limestone Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229920003169 water-soluble polymer Polymers 0.000 description 2
- 239000010456 wollastonite Substances 0.000 description 2
- 229910052882 wollastonite Inorganic materials 0.000 description 2
- NJVOHKFLBKQLIZ-UHFFFAOYSA-N (2-ethenylphenyl) prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1C=C NJVOHKFLBKQLIZ-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- OMOVVBIIQSXZSZ-UHFFFAOYSA-N [6-(4-acetyloxy-5,9a-dimethyl-2,7-dioxo-4,5a,6,9-tetrahydro-3h-pyrano[3,4-b]oxepin-5-yl)-5-formyloxy-3-(furan-3-yl)-3a-methyl-7-methylidene-1a,2,3,4,5,6-hexahydroindeno[1,7a-b]oxiren-4-yl] 2-hydroxy-3-methylpentanoate Chemical compound CC12C(OC(=O)C(O)C(C)CC)C(OC=O)C(C3(C)C(CC(=O)OC4(C)COC(=O)CC43)OC(C)=O)C(=C)C32OC3CC1C=1C=COC=1 OMOVVBIIQSXZSZ-UHFFFAOYSA-N 0.000 description 1
- 229920006322 acrylamide copolymer Polymers 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- VNSBYDPZHCQWNB-UHFFFAOYSA-N calcium;aluminum;dioxido(oxo)silane;sodium;hydrate Chemical compound O.[Na].[Al].[Ca+2].[O-][Si]([O-])=O VNSBYDPZHCQWNB-UHFFFAOYSA-N 0.000 description 1
- TXTCTCUXLQYGLA-UHFFFAOYSA-L calcium;prop-2-enoate Chemical compound [Ca+2].[O-]C(=O)C=C.[O-]C(=O)C=C TXTCTCUXLQYGLA-UHFFFAOYSA-L 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- PWZFXELTLAQOKC-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide;tetrahydrate Chemical compound O.O.O.O.[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O PWZFXELTLAQOKC-UHFFFAOYSA-A 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000010556 emulsion polymerization method Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- PROZFBRPPCAADD-UHFFFAOYSA-N ethenyl but-3-enoate Chemical compound C=CCC(=O)OC=C PROZFBRPPCAADD-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 125000003010 ionic group Chemical group 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- DWLAVVBOGOXHNH-UHFFFAOYSA-L magnesium;prop-2-enoate Chemical compound [Mg+2].[O-]C(=O)C=C.[O-]C(=O)C=C DWLAVVBOGOXHNH-UHFFFAOYSA-L 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229920006173 natural rubber latex Polymers 0.000 description 1
- 229910000273 nontronite Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000275 saponite Inorganic materials 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000021 stimulant Substances 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
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- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/23—Acid resistance, e.g. against acid air or rain
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、主に、土木・建築分野において使用される防食性複合体、特に、下水道処理施設などに使用される防食性を有するモルタルやコンクリートに関する。 The present invention mainly relates to an anticorrosive composite used in the field of civil engineering and architecture, and more particularly to an anticorrosive mortar and concrete used in sewerage treatment facilities and the like.
なお、本発明における部や%は特に規定しない限り質量基準で示す。 In the present invention, “parts” and “%” are based on mass unless otherwise specified.
近年、下水処理施設を中心に、コンクリート構造物の硫酸による劣化事例が増加している。このような背景を受けて、コンクリートの硫酸劣化に関する研究も以前にも増して多く見受けられるようになった。硫酸劣化の対策としては、耐酸性に優れる樹脂を塗膜する方法や、耐酸性のモルタルで断面修復する方法が採用されている。
耐酸モルタルとして、ポルトランドセメントとともに、高炉スラグやフライアッシュ、シリカフュームなどを多量に混和したモルタルが提案されている(特許文献1)。
一方、モルタルやコンクリートのひび割れ防止用の有機−無機複合型塗膜養生剤が開発されている(特許文献2)。
In recent years, deterioration cases of concrete structures due to sulfuric acid are increasing mainly in sewage treatment facilities. Against this background, more research on sulfuric acid deterioration of concrete has been seen than ever before. As a countermeasure against sulfuric acid deterioration, a method of coating a resin having excellent acid resistance or a method of repairing a cross section with acid-resistant mortar is employed.
As acid-resistant mortar, mortar in which a large amount of blast furnace slag, fly ash, silica fume, and the like are mixed with Portland cement has been proposed (Patent Document 1).
On the other hand, organic-inorganic composite type coating curing agents for preventing cracking of mortar and concrete have been developed (Patent Document 2).
本発明者は、防食性複合体について種々検討を重ねた結果、ポルトランドセメント、潜在水硬性物質、およびポゾラン物質を含有するセメント組成物を用いたモルタルまたはコンクリートの表面に有機−無機複合型塗膜養生剤をコーティングすることにより、優れた耐酸性とひび割れ抵抗性を併せ持ち、塗膜層の腫れや剥れのない防食性複合体が得られることを知見し、本発明を完成するに至った。 As a result of various studies on the anticorrosive composite, the present inventor has made an organic-inorganic composite coating on the surface of mortar or concrete using a cement composition containing Portland cement, a latent hydraulic substance, and a pozzolanic substance. By coating the curing agent, it was found that an anticorrosive composite having excellent acid resistance and crack resistance and having no swelling or peeling of the coating layer was obtained, and the present invention was completed.
すなわち、本発明は、(1)ポルトランドセメント、潜在水硬性物質、およびポゾラン物質を含有するモルタルまたはコンクリートの表面に有機−無機複合型塗膜養生剤をコーティングした防食性複合体、(2)ポルトランドセメント、潜在水硬性物質、およびポゾラン物質の合計100部中、ポルトランドセメントが20〜40部、潜在水硬性物質が20〜40部、ポゾラン物質が30〜50部である(1)の防食性複合体、(3)潜在水硬性物質が高炉水砕スラグ微粉末である(1)または(2)の防食性複合体、(4)ポゾラン物質がフライアッシュ、シリカフューム、パルプスラッジ焼却灰、下水汚泥焼却灰、および廃ガラス粉末のうちの少なくとも1種を含有する(1)〜(3)のいずれかの防食性複合体、(5)有機−無機複合型塗膜養生剤が合成樹脂水性分散体、水溶性樹脂、および膨潤性粘土鉱物を含有する(1)〜(4)のいずれかの防食性複合体、(6)有機−無機複合型塗膜養生剤の膨潤性粘土鉱物が合成フッ素雲母である(1)〜(5)のいずれかの防食性複合体、(7)有機−無機複合型塗膜養生剤の使用量が50〜500g/m2である(1)〜(6)のいずれかの防食性複合体、(8)ポルトランドセメント、潜在水硬性物質、およびポゾラン物質を含有するモルタルまたはコンクリートの表面に有機−無機複合型塗膜養生剤をコーティングする特徴とする防食性複合体の製法、である。 That is, the present invention provides (1) an anticorrosive composite obtained by coating an organic-inorganic composite type film curing agent on the surface of mortar or concrete containing Portland cement, a latent hydraulic substance, and a pozzolanic substance, and (2) Portland cement. (1) The anticorrosive composite of Portland cement, 20-40 parts, latent hydraulic substance, 20-40 parts, and pozzolan substance, 30-50 parts (3) Anti-corrosive composite of (1) or (2) where the latent hydraulic substance is ground granulated blast furnace slag, (4) The pozzolanic substance is fly ash, silica fume, pulp sludge incineration ash, sewage sludge incineration (1) The anticorrosive composite according to any one of (1) to (3) containing at least one of ash and waste glass powder, (5) an organic-inorganic composite (1) The anticorrosive composite according to any one of (1) to (4), wherein the coating curing agent contains a synthetic resin aqueous dispersion, a water-soluble resin, and a swellable clay mineral; (6) Organic-inorganic composite coating curing The amount of the anticorrosive composite according to any one of (1) to (5), wherein the swelling clay mineral of the agent is synthetic fluorine mica, and (7) the organic-inorganic composite type coating curing agent is 50 to 500 g / m 2. (1) to (6) anticorrosive composite, (8) organic-inorganic composite type coating curing agent on the surface of mortar or concrete containing Portland cement, latent hydraulic substance, and pozzolanic substance A method for producing an anticorrosive composite, characterized by coating.
本発明の防食性複合体は、優れた耐酸性とひび割れ抵抗性を併せ持ち、腫れや剥れもないなどの効果を奏する。 The anticorrosive composite of the present invention has both excellent acid resistance and crack resistance, and exhibits effects such as no swelling or peeling.
本発明のポルトランドセメントとは、普通、早強、超早強、低熱、および中庸熱などの各種ポルトランドセメント、これらポルトランドセメントに、石灰石粉末などや高炉徐冷スラグ微粉末を混合したフィラーセメント、廃棄物利用型セメント、いわゆるエコセメントなどが挙げられ、これらのうちの1種または2種以上が併用可能である。
ポルトランドセメントの粒度は、特に限定されるものではないが、通常、ブレーン比表面積で3000〜6000cm2/gの範囲にある。3000cm2/g未満では強度発現性が充分でない場合があり、6000cm2/gを超えると取り扱いが困難な場合がある。
The Portland cement of the present invention is normal, early strength, super early strength, low heat, moderate heat, and other Portland cement, filler cement in which limestone powder or blast furnace chilled slag fine powder is mixed with these Portland cement, disposal Material-use type cement, so-called eco-cement, and the like can be mentioned, and one or more of these can be used in combination.
The particle size of Portland cement is not particularly limited, but it is usually in the range of 3000 to 6000 cm 2 / g in terms of Blaine specific surface area. Is less than 3000 cm 2 / g may strength development is not sufficient, it may handle difficult exceeds 6000 cm 2 / g.
本発明の潜在水硬性物質とは、カルシウム化合物やアルカリ金属化合物が共存する際に、その刺激効果によって、潜在的な水硬性を発揮する物質を総称するものである。その代表例としては、高炉水砕スラグを挙げることができる。高炉水砕スラグ微粉末は、耐酸性を担う。
高炉水砕スラグ微粉末の粉末度は特に限定されるものではないが、通常、ブレーン比表面積で3000〜9000cm2/g程度の範囲にある。
The latent hydraulic substance of the present invention is a general term for substances that exhibit potential hydraulic properties due to their stimulating effects when calcium compounds and alkali metal compounds coexist. A typical example is blast furnace granulated slag. Blast furnace granulated slag fine powder bears acid resistance.
Although the fineness of the granulated blast furnace slag powder is not particularly limited, it is usually in the range of about 3000 to 9000 cm 2 / g in terms of Blaine specific surface area.
本発明では、高炉水砕スラグ微粉末に代表される潜在水硬性物質に、ポゾラン物質を併用する。本発明のポゾラン物質とは、カルシウム化合物と反応してカルシウムシリケート水和物を生成する物質を総称するものである。ポゾラン物質は耐酸性を向上させる効果を助長する役割を担う。
ポゾラン物質は特に限定されるものではなく、その具体例としては、例えば、フライアッシュ、シリカフューム、パルプスラッジ焼却灰、下水汚泥焼却灰、廃ガラス粉末などが挙げられる。中でも、フライアッシュやシリカフュームの使用が好ましい。
フライアッシュおよびシリカフュームの粉末度は、特に限定されるものではないが、通常、フライアッシュについては、ブレーン比表面積で3000〜9000cm2/g程度の範囲にあり、シリカフュームについては、BET比表面積で2〜20m2/g程度の範囲にある。
In the present invention, a pozzolanic material is used in combination with a latent hydraulic material typified by ground granulated blast furnace slag. The pozzolanic substance of the present invention is a general term for substances that react with calcium compounds to produce calcium silicate hydrates. The pozzolanic material plays a role in promoting the effect of improving acid resistance.
The pozzolanic material is not particularly limited, and specific examples thereof include fly ash, silica fume, pulp sludge incinerated ash, sewage sludge incinerated ash, waste glass powder, and the like. Among these, use of fly ash or silica fume is preferable.
The fineness of fly ash and silica fume is not particularly limited. Usually, fly ash is in the range of 3000 to 9000 cm 2 / g of brain specific surface area, and silica fume is 2 in terms of BET specific surface area. It exists in the range of about -20m < 2 > / g.
潜在水硬性物質とポゾラン物質は、その反応機構が異なるため、学術的には明確に区別されている。つまり、潜在水硬性物質におけるカルシウム化合物やアルカリ金属化合物は刺激剤として振る舞い、触媒的な役割を担うのに対して、ポゾラン物質におけるカルシウム化合物は、反応物として振る舞うため、ポゾラン物質がもつSiO2分に見合う量のカルシウム分が必要となり、カルシウム分が不足するとポゾラン反応は停滞してしまうことになる。 Latent hydraulic materials and pozzolanic materials are clearly distinguished academically because of their different reaction mechanisms. In other words, calcium compounds and alkali metal compounds in latent hydraulic materials act as stimulants and play a catalytic role, whereas calcium compounds in pozzolanic materials act as reactants, so the SiO 2 content of pozzolanic materials A sufficient amount of calcium is required, and if the calcium content is insufficient, the pozzolanic reaction will stagnate.
本発明では、潜在水硬性物質として高炉水砕スラグ微粉末を、ポゾラン物質として、フライアッシュとシリカフュームを選定し、これらを併用することが、耐酸性の観点から好ましい。 In the present invention, it is preferable from the viewpoint of acid resistance that blast furnace granulated slag fine powder is selected as the latent hydraulic material, fly ash and silica fume are selected as the pozzolanic material, and these are used in combination.
本発明のモルタルまたはコンクリートとは、ポルトランドセメント、潜在水硬性物質、およびポゾラン物質からなるセメント組成物と、通常使用されている砂、砂利などの細骨材や粗骨材や、非鉄精錬スラグ骨材を含む骨材などから構成される。
セメント組成物における各材料の配合割合は、特に限定されるものではないが、通常、ポルトランドセメント、潜在水硬性物質、およびポゾラン物質の合計100部中、ポルトランドセメント20〜40部が好ましく、25〜35部がより好ましい。潜在水硬性物質は20〜40部が好ましく、25〜35部がより好ましい。ポゾラン物質は30〜50部が好ましく、35部〜45部がより好ましい。ポルトランドセメントが20部未満では、初期の強度発現性が乏しい場合があり、逆に、40部を超えると耐酸性が充分でない場合がある。潜在水硬性物質が20部未満であると、耐酸性が充分でない場合がり、逆に40部を超えると初期の強度発現性が悪くなり、寸法安定性が悪くなる場合がある。ポゾラン物質が30部未満であると耐酸性が十分でない場合があり、50部を超えると、初期の強度発現性が悪くなる場合がある。
The mortar or concrete of the present invention includes a cement composition comprising Portland cement, a latent hydraulic substance, and a pozzolanic substance, and fine and coarse aggregates such as sand and gravel that are usually used, and non-ferrous smelted slag bone Consists of aggregates including materials.
The blending ratio of each material in the cement composition is not particularly limited, but usually 20 to 40 parts of Portland cement is preferable in a total of 100 parts of Portland cement, latent hydraulic substance, and pozzolanic substance. 35 parts is more preferred. The latent hydraulic substance is preferably 20 to 40 parts, more preferably 25 to 35 parts. The pozzolanic material is preferably 30 to 50 parts, more preferably 35 to 45 parts. If Portland cement is less than 20 parts, the initial strength development may be poor. Conversely, if it exceeds 40 parts, acid resistance may not be sufficient. If the latent hydraulic material is less than 20 parts, the acid resistance may not be sufficient. Conversely, if it exceeds 40 parts, the initial strength development may be deteriorated and the dimensional stability may be deteriorated. If the pozzolan substance is less than 30 parts, the acid resistance may not be sufficient, and if it exceeds 50 parts, the initial strength development may be deteriorated.
本発明の有機−無機複合型塗膜養生剤とは、合成樹脂水性分散体、水溶性樹脂、および膨潤性粘土鉱物を主成分とし、さらに架橋剤を含有するものである。 The organic-inorganic composite type coating curing agent of the present invention is composed mainly of a synthetic resin aqueous dispersion, a water-soluble resin, and a swellable clay mineral, and further contains a crosslinking agent.
本発明の合成樹脂水性分散体としては、一般的には合成樹脂エマルジョンであり、芳香族ビニル単量体、脂肪族共役ジエン系単量体、エチレン系不飽和脂肪酸単量体、およびその他の共重合可能な単量体の内から1種または2種以上を乳化重合して得られるものである。例えば、スチレンを主体としたスチレンブタジエン系ラテックス、スチレンアクリル系エマルジョンやスチレンと共重合したメチルメタクリレートブタジエン系ラテックス、エチレン・アクリルエマルジョンである。合成樹脂エマルジョンには、カルボキシル基またはヒドロキシ基を有するものがより望ましい。
ここで、乳化重合は、重合すべき単量体を混合し、これに乳化剤や重合開始剤などを加え水系で行なう一般的な乳化重合方法である。
膨潤性粘土鉱物との配合安定性を得るには、アンモニア、アミン類、およびカセイソーダなどの塩基性物質を使用し、pH5以上に調整したものが好ましい。
合成樹脂水性分散体の粒子径は、一般的に100〜300nmであるが、60〜100nm程度の小さい粒子径のものが好ましい。
The synthetic resin aqueous dispersion of the present invention is generally a synthetic resin emulsion, and includes an aromatic vinyl monomer, an aliphatic conjugated diene monomer, an ethylenically unsaturated fatty acid monomer, and other co-polymers. It is obtained by emulsion polymerization of one or more of the polymerizable monomers. For example, styrene butadiene latex mainly composed of styrene, styrene acrylic emulsion, methyl methacrylate butadiene latex copolymerized with styrene, and ethylene acrylic emulsion. The synthetic resin emulsion is more preferably one having a carboxyl group or a hydroxy group.
Here, the emulsion polymerization is a general emulsion polymerization method in which monomers to be polymerized are mixed and an emulsifier, a polymerization initiator or the like is added to this to perform in an aqueous system.
In order to obtain blending stability with the swellable clay mineral, it is preferable to use a basic substance such as ammonia, amines, and caustic soda and adjust the pH to 5 or more.
The particle size of the synthetic resin aqueous dispersion is generally 100 to 300 nm, but preferably has a small particle size of about 60 to 100 nm.
本発明の水溶性樹脂としては、加工澱粉またはその誘導体、セルロース誘導体、ポリ酢酸ビニルの鹸化物またはその誘導体、スルホン酸基を有する重合体またはその塩、アクリル酸の重合体や共重合体またはこれらの塩、アクリルアミドの重合体や共重合体、ポリエチレングリコール、およびオキサゾリン基含有重合体などが挙げられ、そのうちの1種または2種以上の使用が可能である。
水溶性樹脂として、純水への溶解度が常温で1%以上であるものであれば良く、樹脂単位重量当たりの水素結合性基またはイオン性基が10〜60%であることが好ましい。また、平均分子量は2000〜1000000が好ましい。
水溶性樹脂の使用量は、合成樹脂水性分散体の固形分100部に対して、固形分換算で0.05〜200部が好ましい。0.05部未満では防湿性が低下する場合があり、200部を超えると防湿性が著しく低下する場合がある。
Examples of the water-soluble resin of the present invention include modified starch or derivatives thereof, cellulose derivatives, saponified polyvinyl acetate or derivatives thereof, polymers having sulfonic acid groups or salts thereof, polymers or copolymers of acrylic acid, or the like. Salts, acrylamide polymers and copolymers, polyethylene glycol, oxazoline group-containing polymers, and the like, and one or more of them can be used.
The water-soluble resin may be one having a solubility in pure water of 1% or more at normal temperature, and preferably has 10 to 60% of hydrogen bonding groups or ionic groups per unit weight of the resin. The average molecular weight is preferably 2000 to 1000000.
The amount of the water-soluble resin used is preferably 0.05 to 200 parts in terms of solid content with respect to 100 parts of solid content of the synthetic resin aqueous dispersion. If the amount is less than 0.05 parts, the moisture resistance may be lowered. If the amount exceeds 200 parts, the moisture resistance may be significantly lowered.
本発明の膨潤性粘土鉱物としては、スクメタイト属に属する層状ケイ酸塩鉱物が挙げられる。例えば、モンモリロナイト、バイデライト、ノントロナイト、サポナイト、合成フッ素雲母、ベントナイトなどである。これらは天然品、合成品、および加工処理品のいずれであっても使用可能であるが、中でも合成フッ素雲母が好ましい。そのうち、日本ベントナイト工業会、標準試験方法 JBAS−104−77に準じた方法での膨潤力が20ml/2g以上の粘土鉱物が好ましい。また、イオン交換当量が100g当たり、10ミリ当量以上ものが好ましく、60〜200ミリ当量以上ものがより好ましい。さらに、そのアスペクト比が50〜5000のものが好ましい。アスペクト比とは、電顕写真により求めた層状に分散した粘土鉱物の長さ/厚みの比である。
膨潤性粘土鉱物の使用量は、合成樹脂水性分散体の固形分100部に対して、1〜50部が好ましい。1部未満では防湿性が低下しブロッキングが生じやすくなる場合があり、50部を超えると有機−無機塗膜養生剤の膜の変形能力が低下する場合がある。
Examples of the swellable clay mineral of the present invention include layered silicate minerals belonging to the scumite genus. For example, montmorillonite, beidellite, nontronite, saponite, synthetic fluorine mica, bentonite and the like. Any of natural products, synthetic products, and processed products can be used. Of these, synthetic fluorine mica is preferable. Among them, a clay mineral having a swelling power of 20 ml / 2 g or more by a method according to the Japan Bentonite Industry Association, standard test method JBAS-104-77 is preferable. Further, the ion exchange equivalent is preferably 10 milliequivalents or more, more preferably 60 to 200 milliequivalents or more per 100 g. Furthermore, the thing whose aspect ratio is 50-5000 is preferable. The aspect ratio is the length / thickness ratio of the clay mineral dispersed in layers obtained by electron micrograph.
The amount of the swellable clay mineral is preferably 1 to 50 parts with respect to 100 parts of the solid content of the synthetic resin aqueous dispersion. If it is less than 1 part, the moisture-proof property may be reduced and blocking may occur easily. If it exceeds 50 parts, the deformability of the organic-inorganic coating curing agent film may be reduced.
架橋剤としては、水溶性樹脂や合成樹脂水性分散体が有するカルボキシル基、アミド基、および水酸基などの親水性官能基と反応して、架橋、高分子化(三次元網目構造)、または疎水化するものであり、カルボキシル基と付加反応を起こすオキサゾリン基を有するものが水溶性樹脂をも兼ねるので好ましい。
架橋剤の使用量は、合成樹脂水性分散体と水溶性樹脂の合計の固形分100部に対して、固形分換算で0.01〜30部が好ましい。0.01部未満では防湿性が低下する場合があり、30部を超えると防湿性やブロッキング防止性が頭打ちになる。
As a crosslinking agent, it reacts with a hydrophilic functional group such as a carboxyl group, an amide group, and a hydroxyl group contained in an aqueous dispersion of a water-soluble resin or a synthetic resin, thereby crosslinking, polymerizing (three-dimensional network structure), or hydrophobicizing Those having an oxazoline group that undergoes an addition reaction with a carboxyl group are also preferable because they also serve as water-soluble resins.
The amount of the crosslinking agent used is preferably 0.01 to 30 parts in terms of solid content with respect to 100 parts of the total solid content of the synthetic resin aqueous dispersion and the water-soluble resin. If the amount is less than 0.01 part, the moisture resistance may be lowered. If the amount exceeds 30 parts, the moisture resistance and the anti-blocking property reach a peak.
本発明では、合成樹脂水性分散体、水溶性樹脂、および膨潤性粘土鉱物を混合して、また、さらに架橋剤を反応させて、有機−無機塗膜養生剤を調製する。
有機−無機塗膜養生剤の合成方法は、水溶性樹脂と膨潤性粘土鉱物をあらかじめ水中で混合した後に、合成樹脂水性分散体と架橋剤を混合する方法が好ましい。
In the present invention, an organic-inorganic coating film curing agent is prepared by mixing a synthetic resin aqueous dispersion, a water-soluble resin, and a swellable clay mineral, and further reacting with a crosslinking agent.
As a method for synthesizing the organic-inorganic coating film curing agent, a method in which a water-soluble resin and a swellable clay mineral are previously mixed in water and then a synthetic resin aqueous dispersion and a crosslinking agent are mixed is preferable.
有機−無機塗膜養生剤をコーティング(被覆)する方法は、均一に養生被覆膜が形成できる方法であれば特に限定されるものではなく、撒布したり、塗布したり、吹付けたりすることが可能である。
有機−無機塗膜養生剤は、水平のモルタルやコンクリート部材であれば、ブリーディング終了後に撒布や被覆することが可能である。また、撒水などの水に関する養生が終了後、できるだけ早い時期に被覆することがひび割れ低減効果を得るために望ましい。
このような有機−無機塗膜養生剤の例としては、東亞合成社の「CA2」シリーズを用いることができる。
The method of coating (coating) the organic-inorganic coating film curing agent is not particularly limited as long as the curing coating film can be uniformly formed, and it is distributed, applied, or sprayed. Is possible.
If the organic-inorganic coating curing agent is a horizontal mortar or a concrete member, it can be spread or coated after the bleeding is completed. In addition, it is desirable to cover as early as possible after completion of water curing such as flooding in order to obtain a crack reduction effect.
As an example of such an organic-inorganic coating film curing agent, “CA2” series manufactured by Toagosei Co., Ltd. can be used.
有機−無機塗膜養生剤の使用量は、特に限定されるものではないが、1m2当たり、100〜500gの範囲で使用することが好ましく、150〜400gがより好ましい。50g未満ではひび割れ抵抗性の向上効果や耐酸性向上効果が十分でなく、500gを超えてもさらなる効果の向上が期待できない。 Organic - The amount of the inorganic coating curing agent is not particularly limited, 1 m 2 per is preferably used in a range of 100 to 500 g, 150 and 400 are more preferred. If it is less than 50 g, the effect of improving crack resistance and the effect of improving acid resistance are not sufficient, and even if it exceeds 500 g, further improvement of the effect cannot be expected.
本発明では、モルタルやコンクリートにポリマーを配合することが、耐酸性の向上の観点から、また、付着強度の向上の観点から好ましい。
本発明で言うポリマーとは、特に限定されるものではない。ポリマーは大別すると、水性ポリマーディスパージョン、水溶性ポリマー、液状ポリマー、再乳化型粉末樹脂の4種類となる。その具体例としては、例えば、水性ポリマーディスパージョンとしては、天然ゴムラテックス、合成ゴムラテックス、樹脂エマルジョン、混合ディスパージョンが分類される。この中には、スチレンブタジエンゴム、クロロプレンゴム、メタクリル酸メチルブタジエンゴム、アクリロニトリルブタジエンゴム、ポリアクリル酸エステル、エチレン酢酸ビニル、スチレンアクリル酸エステル、ポリプロピオン酸ビニル、ポリプロピレン、エポキシ樹脂、アスファルト、パラフィン、混合ラテックス、混合エマルジョンなどが挙げられる。水溶性ポリマーとしては、例えば、メチルセルロース、ヒドロキシプロピルメチルセルロース、ポリビニルアルコール、アクリル酸カルシウム、アクリル酸マグネシウムなどが挙げられる。液状ポリマーとしては、例えば、不飽和ポリエステル樹脂やエポキシ樹脂などが挙げられる。再乳化型粉末樹脂としては、例えば、スチレンブタジエンゴム、エチレン酢酸ビニル、酢酸ビニルビニルバーサテート、スチレンアクリル酸エステル、ポリアクリル酸エステルなどが挙げられる。
In the present invention, blending a polymer with mortar or concrete is preferable from the viewpoint of improving acid resistance and from the viewpoint of improving adhesion strength.
The polymer referred to in the present invention is not particularly limited. The polymers are roughly classified into four types: aqueous polymer dispersions, water-soluble polymers, liquid polymers, and re-emulsifying powder resins. Specific examples of the aqueous polymer dispersion include natural rubber latex, synthetic rubber latex, resin emulsion, and mixed dispersion. Among these, styrene butadiene rubber, chloroprene rubber, methyl methacrylate butadiene rubber, acrylonitrile butadiene rubber, polyacrylate, ethylene vinyl acetate, styrene acrylate, vinyl polypropionate, polypropylene, epoxy resin, asphalt, paraffin, Examples include mixed latex and mixed emulsion. Examples of the water-soluble polymer include methyl cellulose, hydroxypropyl methyl cellulose, polyvinyl alcohol, calcium acrylate, magnesium acrylate and the like. Examples of the liquid polymer include unsaturated polyester resins and epoxy resins. Examples of the re-emulsifying powder resin include styrene butadiene rubber, ethylene vinyl acetate, vinyl acetate vinyl versatate, styrene acrylate ester, polyacrylate ester and the like.
ポリマーの使用量は、特に限定されるものではないが、通常、セメント組成物100部に対して、固形分換算で、1〜10部が好ましく、3〜7部がより好ましい。1部未満では、付着強度の改善効果、物質遮断性およびひび割れ抵抗性が充分に得られない場合があり、10部を超えて使用すると、凝結遅延や初期強度発現性が悪くなる場合がある。 Although the usage-amount of a polymer is not specifically limited, Usually, 1-10 parts are preferable in conversion of solid content with respect to 100 parts of cement compositions, and 3-7 parts are more preferable. If the amount is less than 1 part, the effect of improving the adhesion strength, the substance barrier property and the crack resistance may not be sufficiently obtained. If the amount exceeds 10 parts, the setting delay and the initial strength may be deteriorated.
本発明では、モルタルやコンクリートに繊維質物質を配合することがひび割れ抵抗性を向上させる観点から好ましい。
本発明で言う繊維質物質とは、特に限定されるものではないが、その具体例としては、例えば、ビニロン繊維、セルロース繊維、アクリル繊維などの有機系繊維、炭素繊維、スチールファイバー、ワラストナイト繊維、ガラス繊維などの無機系繊維などが挙げられる。本発明ではこれらのうちの1種または2種以上が使用可能である。
In the present invention, it is preferable to add a fibrous material to mortar or concrete from the viewpoint of improving crack resistance.
The fibrous substance referred to in the present invention is not particularly limited, but specific examples thereof include, for example, organic fibers such as vinylon fiber, cellulose fiber, and acrylic fiber, carbon fiber, steel fiber, and wollastonite. Examples thereof include inorganic fibers such as fibers and glass fibers. In the present invention, one or more of these can be used.
繊維質物質の使用量は、特に限定されるものではないが、通常、セメント組成物100部に対して、0.1〜3部が好ましく、0.3〜2部がより好ましい。0.1部未満では、ひび割れ抵抗性が十分に得られない倍があり、3部を超えて使用してもさらなる効果の増進が期待できず、分散性が悪くなる場合がある。 Although the usage-amount of a fibrous substance is not specifically limited, Usually, 0.1-3 parts are preferable with respect to 100 parts of cement compositions, and 0.3-2 parts are more preferable. If the amount is less than 0.1 part, crack resistance cannot be sufficiently obtained. If the amount exceeds 3 parts, further improvement of the effect cannot be expected and the dispersibility may deteriorate.
本発明のセメント組成物の粒度は、使用する目的・用途に依存するため特に限定されるものではないが、通常、ブレーン比表面積で3000〜8000cm2/gが好ましく、4000〜6000cm2/gがより好ましい。3000cm2/g未満では強度発現性が十分に得られない場合があり、8000cm2/gを超えると作業性が悪くなる場合がある。 The particle size of the cement composition of the present invention is not particularly limited since it depends on the purpose and application to be used, usually, preferably 3000~8000cm 2 / g in Blaine specific surface area, 4000~6000cm 2 / g is More preferred. If it is less than 3000 cm 2 / g, sufficient strength development may not be obtained, and if it exceeds 8000 cm 2 / g, workability may deteriorate.
本発明では、石灰石微粉末、高炉徐冷スラグ微粉末、などの混和材料、減水剤、AE減水剤、高性能減水剤、高性能AE減水剤、消泡剤、増粘剤、防錆剤、防凍剤、収縮低減剤、凝結調整剤、ベントナイトなどの粘土鉱物、ならびに、ハイドロタルサイトなどのアニオン交換体などのうちの1種または2種以上を、本発明の目的を実質的に阻害しない範囲で使用することが可能である。 In the present invention, admixture materials such as limestone fine powder, blast furnace slow-cooled slag fine powder, water reducing agent, AE water reducing agent, high performance water reducing agent, high performance AE water reducing agent, antifoaming agent, thickener, rust preventive agent, Range that does not substantially impair the object of the present invention among one or more of antifreezing agents, shrinkage reducing agents, setting modifiers, clay minerals such as bentonite, and anion exchangers such as hydrotalcite Can be used.
本発明において、各材料の混合方法は特に限定されるものではなく、それぞれの材料を施工時に混合しても良いし、あらかじめ一部を、あるいは全部を混合しておいても差し支えない。 In the present invention, the mixing method of each material is not particularly limited, and each material may be mixed at the time of construction, or a part or all of them may be mixed in advance.
混合装置としては、既存のいかなる装置も使用可能であり、例えば、傾胴ミキサ、オムニミキサ、ヘンシェルミキサ、V型ミキサ、およびナウタミキサなどの使用が可能である。 Any existing device can be used as the mixing device, and for example, a tilting barrel mixer, an omni mixer, a Henschel mixer, a V-type mixer, and a Nauta mixer can be used.
以下、実施例で詳細に説明する。 Examples will be described in detail below.
ポルトランドセメント30部と潜在水硬性物質30部と表1に示す各種のポゾラン物質40部とを配合してセメント組成物を調製した。次いで、JIS R 5201に準じてモルタルを調製し、表面に有機−無機複合型塗膜養生剤を1m2当たり200gの割合で塗布した。この硬化体のひび割れ抵抗性の確認やモルタルの腫れや剥れの観察および耐酸性試験を行った。なお、比較のために、有機−無機複合型塗膜養生剤を表面に塗布するのではなく、モルタルに混和して用いた場合についても同様に行った。結果を表1に併記する。 A cement composition was prepared by blending 30 parts of Portland cement, 30 parts of a latent hydraulic substance and 40 parts of various pozzolanic substances shown in Table 1. Next, mortar was prepared according to JIS R 5201, and an organic-inorganic composite type coating curing agent was applied to the surface at a rate of 200 g per 1 m 2 . Confirmation of crack resistance of the cured body, observation of swelling and peeling of the mortar, and acid resistance test were performed. For comparison, the organic-inorganic composite type film curing agent was not applied on the surface, but was also used in the case of being mixed with mortar. The results are also shown in Table 1.
<使用材料>
ポルトランドセメント:市販の普通ポルトランドセメント、ブレーン比表面積3000cm2/g
潜在水硬性物質:市販の高炉水砕スラグ微粉末、ブレーン比表面積4000cm2/g
ポゾラン物質A:市販のフライアッシュ、ブレーン比表面積4000cm2/g
ポゾラン物質B:市販のシリカフューム、BET比表面積15m2/g
ポゾラン物質C:市販のパルプスラッジ焼却灰、ブレーン比表面積4000cm2/g
ポゾラン物質D:市販の下水汚泥焼却灰、ブレーン比表面積9000cm2/g
ポゾラン物質E:市販の廃ガラス粉末、ブレーン比表面積4000cm2/g
ポゾラン物質F:ポゾラン物質A75部とポゾラン物質B25部の混合物、ブレーン比表面積9000cm2/g
有機−無機複合型塗膜養生剤:東亞合成社製、「CA202」、アクリル樹脂−フッ素雲母の複合型
水:水道水
細骨材:JIS R 5201で使用する標準砂
<Materials used>
Portland cement: Commercially available ordinary Portland cement, Blaine specific surface area of 3000 cm 2 / g
Latent hydraulic material: Commercially ground granulated blast furnace slag, Blaine specific surface area 4000 cm 2 / g
Pozzolanic material A: Commercial fly ash, Blaine specific surface area 4000 cm 2 / g
Pozzolanic material B: commercially available silica fume, BET specific surface area of 15 m 2 / g
Pozzolanic material C: commercial pulp sludge incineration ash, Blaine specific surface area 4000 cm 2 / g
Pozzolanic substance D: Commercial sewage sludge incineration ash, Blaine specific surface area 9000 cm 2 / g
Pozzolanic material E: commercially available waste glass powder, Blaine specific surface area 4000 cm 2 / g
Pozzolanic substance F: Mixture of 75 parts of pozzolanic substance A and 25 parts of pozzolanic substance B, Blaine specific surface area 9000 cm 2 / g
Organic-inorganic composite type film curing agent: “CA202” manufactured by Toagosei Co., Ltd., acrylic resin-fluorine mica composite type water: tap water fine aggregate: standard sand used in JIS R 5201
<測定方法>
ひび割れ抵抗性試験:50cm×50cmのコンクリート板にモルタルを10mmの厚さで塗りつけ、温度20℃、相対湿度40%の環境で1日間放置し、ひび割れの発生具合を観察した。◎はひび割れが全くなし。○はひび割れ幅0.05mm以下のひび割れが1本のみ発生。−はひび割れが1本であるがひび割れ幅が0.05mmを超えた場合、△はひび割れが2本発生。×はひび割れが3本以上発生。
耐酸性:7%濃度の硫酸溶液に供試体を3ヶ月間浸漬し、供試体の外観の変化や質量減少から耐酸性を評価した。×は外観の変化が著しく、かつ、質量変化率が±5%以上の場合、△は外観の変化が著しいか、あるいは、質量変化率が±5%以上のいずれか一方を満たす場合、○は外観の変化と質量変化ともに上記条件に該当しない場合とした。
腫れ・剥れの観察:上記耐酸性試験後において、目に見えて腫れが認められ、かつ、硬化体表面に剥れが発生した場合は×、腫れまたは剥れのいずれかが認められた場合は△、いずれも認められず健全な状態であった場合を○とした。
<Measurement method>
Crack resistance test: A mortar was applied to a 50 cm × 50 cm concrete plate with a thickness of 10 mm, and left for 1 day in an environment of a temperature of 20 ° C. and a relative humidity of 40%, and the occurrence of cracks was observed. ◎ has no cracks. ○ indicates that only one crack with a crack width of 0.05 mm or less occurs. -Indicates one crack, but if the crack width exceeds 0.05 mm, Δ indicates two cracks. ×: 3 or more cracks occurred.
Acid resistance: The specimen was immersed in a 7% strength sulfuric acid solution for 3 months, and the acid resistance was evaluated from the change in appearance and mass reduction of the specimen. × indicates a significant change in appearance and a mass change rate of ± 5% or more, △ indicates a significant change in appearance, or a mass change rate satisfies ± 5% or more, ○ Both the change in appearance and the change in mass were determined not to meet the above conditions.
Observation of swelling / peeling: When the above acid resistance test shows visible swelling and peeling occurs on the cured body surface, x, swelling or peeling is observed △, where none was recognized and was in a healthy state.
表1より、本発明の防食性複合体は、優れた耐酸性とひび割れ抵抗性をもち、腫れや剥がれがないことがわかる。 From Table 1, it can be seen that the anticorrosive composite of the present invention has excellent acid resistance and crack resistance, and there is no swelling or peeling.
ポルトランドセメントと潜在水硬性物質とポゾラン物質Fを表2に示すように配合してセメント組成物を調製したこと以外は実施例1と同様に行った。結果を表2に併記する。 The same procedure as in Example 1 was conducted except that Portland cement, a latent hydraulic substance, and pozzolanic substance F were blended as shown in Table 2 to prepare a cement composition. The results are also shown in Table 2.
表2より、本発明の防食性複合体は、優れた耐酸性とひび割れ抵抗性をもち、腫れや剥がれがないことがわかる。 From Table 2, it can be seen that the anticorrosive composite of the present invention has excellent acid resistance and resistance to cracking, and there is no swelling or peeling.
実施例1の実験No.1-6において、有機−無機複合型塗膜養生剤の使用量を表3に示すように変えたこと以外は実施例1と同様に行った。結果を表3に併記する。 In Experiment No. 1-6 of Example 1, the same procedure as in Example 1 was performed, except that the amount of the organic-inorganic composite type film curing agent used was changed as shown in Table 3. The results are also shown in Table 3.
表3より、本発明の防食性複合体は、優れた耐酸性とひび割れ抵抗性をもち、腫れや剥がれがないことがわかる。 From Table 3, it can be seen that the anticorrosive composite of the present invention has excellent acid resistance and crack resistance, and there is no swelling or peeling.
実施例1の実験No.1-6において、セメント組成物100部に対して、表4に示すようにポリマーを固形分換算で配合してセメント組成物としたこと以外は実施例1と同様に行った。なお、付着試験も行った。結果を表4に併記する。 In Experiment No. 1-6 of Example 1, as in Example 1, except that a polymer was blended in terms of solid content as shown in Table 4 to 100 parts of the cement composition to obtain a cement composition. went. An adhesion test was also conducted. The results are also shown in Table 4.
<使用材料>
ポリマーα:市販のスチレンブタジエンゴム系
ポリマーβ:市販のポリアクリル酸エステル系
ポリマーγ:市販のエチレン酢酸ビニル系
ポリマーΔ:市販の酢酸ビニルビニルバーサテート系
<Materials used>
Polymer α: Commercially available styrene butadiene rubber polymer β: Commercially available polyacrylate polymer γ: Commercially available ethylene vinyl acetate polymer Δ: Commercially available vinyl vinyl acetate versatate
<測定方法>
付着試験:JIS A 1171に準じて、材齢28日の付着強度を測定した。
<Measurement method>
Adhesion test: According to JIS A 1171, the adhesion strength at the age of 28 days was measured.
表4より、本発明の防食性複合体は、優れた耐酸性とひび割れ抵抗性をもち、腫れや剥がれがなく、さらに、付着性が高いことがわかる。 From Table 4, it can be seen that the anticorrosive composite of the present invention has excellent acid resistance and crack resistance, does not swell or peel, and has high adhesion.
実施例1の実験No.1-6において、セメント組成物100部に対して、表5に示すように繊維質物質を配合したこと以外は実施例1と同様に行った。結果を表5に併記する。 In Experiment No. 1-6 of Example 1, it carried out like Example 1 except having mix | blended the fiber substance as shown in Table 5 with respect to 100 parts of cement compositions. The results are also shown in Table 5.
<使用材料>
繊維質物質(1):市販のビニロン繊維、長さ6mm、径200μm
繊維質物質(2):市販のアクリル繊維、長さ6mm、径200μm
繊維質物質(3):市販のセルロース繊維、長さ200μm、径30μm
繊維質物質(4):市販のカーボン繊維、長さ6mm、径200μm
繊維質物質(5):市販のワラストナイト繊維、長さ600μm、径40μm
<Materials used>
Fibrous material (1): commercially available vinylon fiber, length 6 mm, diameter 200 μm
Fibrous material (2): commercially available acrylic fiber, length 6 mm, diameter 200 μm
Fibrous material (3): commercially available cellulose fiber, length 200 μm, diameter 30 μm
Fibrous material (4): commercially available carbon fiber, length 6 mm, diameter 200 μm
Fibrous material (5): commercially available wollastonite fiber, length 600 μm, diameter 40 μm
表5より、本発明の防食性複合体は、優れた耐酸性とひび割れ抵抗性をもち、腫れや剥がれがないことがわかる。 From Table 5, it can be seen that the anticorrosive composite of the present invention has excellent acid resistance and crack resistance, and there is no swelling or peeling.
本発明の防食性複合体は、優れた耐酸性とひび割れ抵抗性を併せ持ち、腫れや剥れもない。さらに、付着性を高めることもできる。そのため、土木および建築分野、特に、下水道処理施設などに使用される防食性を有するモルタルやコンクリートに適する。 The anticorrosive composite of the present invention has excellent acid resistance and crack resistance, and does not swell or peel off. Furthermore, adhesion can also be improved. Therefore, it is suitable for the mortar and concrete having anticorrosive properties used in the civil engineering and construction fields, particularly sewerage treatment facilities.
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JP2012219001A (en) * | 2011-04-13 | 2012-11-12 | Taiheiyo Cement Corp | Concrete for pavement |
WO2016107936A1 (en) * | 2014-12-30 | 2016-07-07 | Envirocem, S.L. | Mortar or concrete produced with a hydraulic binder |
WO2018103814A1 (en) | 2016-12-05 | 2018-06-14 | Art Carbon International Ag | Construction material composition comprising carbon nanotubes, stabilized aqueous carbon nanotube dispersion, and methods for the preparation thereof |
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