JP2008194900A - Treating method of high-strength concrete and high-strength concrete cured block - Google Patents
Treating method of high-strength concrete and high-strength concrete cured block Download PDFInfo
- Publication number
- JP2008194900A JP2008194900A JP2007031047A JP2007031047A JP2008194900A JP 2008194900 A JP2008194900 A JP 2008194900A JP 2007031047 A JP2007031047 A JP 2007031047A JP 2007031047 A JP2007031047 A JP 2007031047A JP 2008194900 A JP2008194900 A JP 2008194900A
- Authority
- JP
- Japan
- Prior art keywords
- strength concrete
- organic
- water
- inorganic composite
- strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011372 high-strength concrete Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 239000000057 synthetic resin Substances 0.000 claims abstract description 14
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 14
- 239000002734 clay mineral Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 239000006185 dispersion Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 20
- 239000004567 concrete Substances 0.000 abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 14
- 238000006386 neutralization reaction Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 6
- 230000008014 freezing Effects 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract description 5
- 230000008961 swelling Effects 0.000 abstract description 3
- 230000004927 fusion Effects 0.000 abstract 1
- 238000001802 infusion Methods 0.000 abstract 1
- 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 abstract 1
- 239000002893 slag Substances 0.000 description 17
- 239000004568 cement Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000004570 mortar (masonry) Substances 0.000 description 9
- 239000003638 chemical reducing agent Substances 0.000 description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000003431 cross linking reagent Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 235000012216 bentonite Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000010257 thawing Methods 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000002956 ash Substances 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
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910021487 silica fume Inorganic materials 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 125000003504 2-oxazolinyl group Chemical group O1C(=NCC1)* 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920008716 Darex Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229920006322 acrylamide copolymer Polymers 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000012615 aggregate Substances 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
- 239000007798 antifreeze agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 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
- 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
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 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
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [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 GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000010556 emulsion polymerization method Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000005484 gravity Effects 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
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 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
- 125000005647 linker group Chemical group 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral 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
- 229910000273 nontronite Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000275 saponite Inorganic materials 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010802 sludge Substances 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
- 239000004575 stone Substances 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 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
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Abstract
Description
本発明は、主に、土木・建築業界において使用される高強度コンクリートの処理方法及び高強度コンクリート硬化体に関する。
本発明における高強度コンクリートとは、高強度モルタルや高強度コンクリートを総称するものである。
The present invention mainly relates to a method for treating high-strength concrete used in the civil engineering and construction industry and a high-strength concrete hardened body.
The high strength concrete in the present invention is a general term for high strength mortar and high strength concrete.
高強度コンクリートは、コンクリート構造物の部材断面の縮小や部材の力学的な高性能化をもたらす。また、硬化体組織の緻密化による、コンクリート構造物の耐久性向上の観点からも重要である。 High-strength concrete brings about reduction of the member cross section of the concrete structure and improvement of the mechanical performance of the member. It is also important from the viewpoint of improving the durability of the concrete structure by densifying the hardened body structure.
高強度コンクリートは、水結合材比を低減し、ポゾラン反応性、充填性の効果を有する各種微粉末や高強度混和材などを配合することにより、圧縮強度を高めたコンクリートである(非特許文献1)。普通コンクリートと比較して、硬化体の空隙量が少ないため、塩化物イオンの侵入や中性化を抑制でき、コンクリート構造物の耐久性を高めることができる(非特許文献2)。しかし、水結合材比が小さく、ブリーディング(浮き水)がないか、あるいは極めて少ないため、表面が乾燥しやすく、施工後にプラスチックひび割れが発生しやすい。ひび割れが発生すると、塩化物イオンや炭酸ガスなど鉄筋コンクリートを劣化させる物質の浸入経路となり、コンクリート構造物の耐久性が損なわれる。また、高強度コンクリートでは、若材齢で乾燥を受けると、凍結融解抵抗性が小さくなる。これは、乾燥により生じたひび割れを伝って硬化体内部に水が供給され、凍結融解作用により硬化体が損傷を受けるためと考えられている。 High-strength concrete is concrete in which the compressive strength is increased by blending various fine powders and high-strength admixtures that have an effect of pozzolanic reactivity and filling properties with a reduced water binder ratio (non-patent literature) 1). Since the amount of voids in the cured body is smaller than that of ordinary concrete, intrusion and neutralization of chloride ions can be suppressed, and the durability of the concrete structure can be enhanced (Non-patent Document 2). However, since the water binder ratio is small and there is no or very little bleeding (floating water), the surface is easy to dry and plastic cracks are likely to occur after construction. When cracking occurs, it becomes an infiltration path for substances that deteriorate reinforced concrete, such as chloride ions and carbon dioxide, and the durability of the concrete structure is impaired. In addition, when high strength concrete is dried at a young age, freeze-thaw resistance is reduced. It is considered that this is because water is supplied into the cured body through cracks generated by drying, and the cured body is damaged by the freeze-thaw action.
一方、有機-無機複合型塗膜養生剤が開発されている(特許文献1)。しかし、高強度コンクリートの表面に有機-無機複合型塗膜養生剤を塗布することについては何ら開示がなく、また、どのような効果が発揮されるかについて、いかなる示唆も見当たらない。 On the other hand, an organic-inorganic composite coating film curing agent has been developed (Patent Document 1). However, there is no disclosure about applying an organic-inorganic composite-type film curing agent to the surface of high-strength concrete, and no suggestion about what effect is exhibited.
本発明は、ひび割れがなく、塩化物イオンの侵入や中性化を抑制でき、凍結融解抵抗性が大きいコンクリート硬化体が得られる高強度コンクリートの処理方法及び高強度コンクリート硬化体を提供する。 The present invention provides a high-strength concrete treatment method and a high-strength concrete hardened body that are free of cracks, can suppress the intrusion and neutralization of chloride ions, and provide a hardened concrete with high freeze-thaw resistance.
すなわち、本発明は、(1)高強度コンクリートを打設した後、直ちに表面に有機−無機複合型塗膜養生剤を塗布することを特徴とする高強度コンクリートの処理方法、(2)水結合材比が35%以下であることを特徴とする(1)の高強度コンクリートの処理方法、(3)有機−無機複合型塗膜剤が、合成樹脂水性分散体、水溶性樹脂、及び膨潤性粘土鉱物を主体とすることを特徴とする(1)又は(2)の高強度コンクリートの処理方法、(4)有機−無機複合型塗膜剤の膨潤性粘土鉱物が、合成フッ素雲母であることを特徴とする(1)〜(3)のいずれかの高強度コンクリートの処理方法、(5)有機−無機複合型塗膜剤の使用量が、50〜500g/m2であることを特徴とする(1)〜(4)のいずれかの高強度コンクリートの処理方法、(6)(1)〜(5)いずれかの処理方法によって処理された高強度コンクリート硬化体、である。 That is, the present invention is (1) a method for treating high-strength concrete, characterized by immediately applying high-strength concrete and immediately applying an organic-inorganic composite coating curing agent to the surface; (2) water bonding (1) A method for treating high-strength concrete according to (1) characterized in that the material ratio is 35% or less, (3) an organic-inorganic composite coating agent, a synthetic resin aqueous dispersion, a water-soluble resin, and a swelling property (1) The high-strength concrete processing method according to (1) or (2), characterized in that the swellable clay mineral of the organic-inorganic composite coating agent is synthetic fluoromica The high-strength concrete processing method according to any one of (1) to (3), characterized in that the amount of the organic-inorganic composite coating agent used is 50 to 500 g / m 2. (1) to (4) high-strength concrete Treatment method (6) A high-strength concrete cured body treated by any one of the treatment methods (1) to (5).
本発明によれば、ひび割れがなく、塩化物イオンの侵入や中性化を抑制でき、凍結融解抵抗性が大きい高強度コンクリート硬化体が得られる。 According to the present invention, there can be obtained a high-strength concrete hardened body that is free from cracks, can suppress intrusion and neutralization of chloride ions, and has high resistance to freezing and thawing.
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, “part” and “%” are based on mass unless otherwise specified.
高強度コンクリートは、通常、セメント、細骨材、粗骨材、水、減水剤等を含有し、一般に圧縮強度が60N/mm2程度以上のものを指す。水結合材比を低減し、潜在水硬性を示す高炉水砕スラグや、ポゾラン反応性を示すフライアッシュ、シリカフューム、無水石膏を主成分とする高強度混和材等を配合することにより、硬化体の空隙量が減少し、高強度化される。空隙量の減少に伴い、塩化物イオンの侵入や中性化を抑制でき、コンクリート構造物の耐久性を高めることができる。また、水結合材比が小さいため、硬化体内部に自由水が少なく、硬化体が緻密であり、外界から硬化体内部への水の浸入が少ないため、凍結融解抵抗性が大きい。 High-strength concrete usually contains cement, fine aggregate, coarse aggregate, water, water reducing agent, and the like, and generally has a compressive strength of about 60 N / mm 2 or more. By reducing the water binder ratio and blending granulated blast furnace slag with latent hydraulic properties, fly ash, silica fume, anhydrous gypsum with pozzolanic reactivity, etc. The amount of voids is reduced and the strength is increased. As the amount of voids decreases, the intrusion and neutralization of chloride ions can be suppressed, and the durability of the concrete structure can be enhanced. In addition, since the water binder ratio is small, there is little free water inside the cured body, the cured body is dense, and there is little intrusion of water from the outside to the inside of the cured body, resulting in high freeze-thaw resistance.
本発明で使用するセメントは、普通、早強、超早強、低熱、及び中庸熱等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、高炉スラグ、フライアッシュ、又はシリカを混合した各種混合セメント、また、石灰石粉末等や高炉徐冷スラグ微粉末を混合したフィラーセメント、各種の産業廃棄物を主原料として製造される環境調和型セメント、いわゆるエコセメント等が挙げられ、これらのうちの1種又は2種以上が併用可能である。 The cement used in the present invention is usually various Portland cements such as early strength, super early strength, low heat, and moderate heat, various mixed cements obtained by mixing these Portland cements with blast furnace slag, fly ash, or silica, Examples include filler cement mixed with limestone powder and blast furnace slow-cooled slag fine powder, environmentally friendly cement manufactured using various industrial wastes as main raw materials, so-called eco-cement, etc., one or two of these The above can be used together.
本発明で使用する骨材は、特に限定されるものではない。その具体例としては、例えば、ケイ砂、ケイ石、石灰石骨材、高炉水砕スラグ細骨材及び粗骨材、再生骨材等が挙げられる。また、比重3.0g/cm3以上の重量骨材を使用することもでき、その具体例としては、例えば、人工骨材として、高炉徐冷スラグ骨材、電気炉酸化期スラグ系骨材や、フェロニッケルスラグ、フェロクロムスラグ、銅スラグ、亜鉛スラグ、及び鉛スラグ等を総称する非鉄精錬スラグ骨材等が、また、天然骨材としては、橄欖岩(かんらん岩)系骨材、いわゆるオリビンサンドや、エメリー鉱等が挙げられる。本発明では、これらの1種又は2種以上を併用できる。 The aggregate used in the present invention is not particularly limited. Specific examples thereof include silica sand, silica stone, limestone aggregate, blast furnace granulated slag fine aggregate and coarse aggregate, recycled aggregate, and the like. Further, a heavy aggregate having a specific gravity of 3.0 g / cm 3 or more can be used. Specific examples thereof include, for example, an artificial aggregate such as a blast furnace annealed slag aggregate, an electric furnace oxidation period slag-based aggregate, Nonferrous refining slag aggregates such as ferronickel slag, ferrochrome slag, copper slag, zinc slag, lead slag, etc., and as natural aggregate, peridotite aggregate, so-called olivine Sand and emery ore are examples. In this invention, these 1 type (s) or 2 or more types can be used together.
本発明で使用する減水剤は、特に限定されるものではない。その具体例としては、例えば、ナフタレン系としては、エヌエムビー社製商品名「レオビルドSP−9シリーズ」、花王社製商品名「マイティ2000シリーズ」、及び日本製紙社製商品名「サンフローHS−100」等が挙げられる。また、メラミン系としては、日本シーカ社製商品名「シーカメント1000シリーズ」や日本製紙社製商品名「サンフローHS−40」等が挙げられる。さらに、アミノスルホン酸系としては、フローリック社製商品名「FP−200シリーズ」等が挙げられる。ポリカルボン酸系としては、エヌエムビー社製商品名「レオビルドSP−8シリーズ」、グレースケミカルズ社製商品名「ダーレックススーパー100PHX」、及び竹本油脂社製商品名「チューポールHP−8シリーズ」や「チューポールHP−11シリーズ」等が挙げられる。本発明ではこれら減水剤のうちの一種又は二種以上が使用可能であり、高い減水性能を示す点から、ポリカルボン酸系の使用が好ましい。減水剤の使用量は特に限定されるものではなく、用途や要求される作業性に応じて適宜調整される。 The water reducing agent used in the present invention is not particularly limited. Specific examples thereof include, for example, the product name “Leo Build SP-9 Series” manufactured by NMB, the product name “Mighty 2000 Series” manufactured by Kao Corporation, and the product name “Sunflow HS-100” manufactured by Nippon Paper Industries Co., Ltd. Or the like. Moreover, as a melamine type | system | group, Nippon Seika Co., Ltd. brand name "Sea Kament 1000 series", Nippon Paper Industries Co., Ltd. brand name "Sunflow HS-40", etc. are mentioned. Furthermore, as an aminosulfonic acid type | system | group, the product name "FP-200 series" by Floric etc. are mentioned. Examples of polycarboxylic acid-based products include the product name “Leobuild SP-8 Series” manufactured by NMB, the product name “Darex Super 100PHX” manufactured by Grace Chemicals, and the product names “Tupol HP-8 Series” manufactured by Takemoto Yushi Co., Ltd. And “Tupole HP-11 series”. In this invention, 1 type, or 2 or more types of these water reducing agents can be used, and use of polycarboxylic acid type is preferable from the point which shows high water reduction performance. The amount of water reducing agent used is not particularly limited, and is appropriately adjusted according to the application and required workability.
本発明における高強度コンクリートの水結合材比は、35%以下が好ましく、30%以下がより好ましい。水結合材比が35%を超えると高強度化しにくく、塩化物イオンの侵入や中性化を抑制でき、凍結融解抵抗性が大きい高強度コンクリート硬化体が得られにくい。ここで、結合材とは、セメントに潜在水硬性を示す高炉水砕スラグや、ポゾラン反応性を示すフライアッシュ、シリカフューム、無水石膏を主成分とする高強度混和材等を配合したものを言う。 The water binder ratio of the high strength concrete in the present invention is preferably 35% or less, and more preferably 30% or less. If the water binder ratio exceeds 35%, it is difficult to increase the strength, it is possible to suppress the intrusion and neutralization of chloride ions, and it is difficult to obtain a high-strength concrete hardened body with high freeze-thaw resistance. Here, the binder refers to a cement containing a granulated blast furnace slag having latent hydraulic properties, fly ash having pozzolanic reactivity, silica fume, a high-strength admixture mainly composed of anhydrous gypsum, and the like.
本発明では、セメント、骨材、流動化剤等とともに、石灰石微粉末、高炉徐冷スラグ微粉末、下水汚泥焼却灰やその溶融スラグ、都市ゴミ焼却灰やその溶融スラグ、パルプスラッジ焼却灰等の混和材料、凝結調整剤、消泡剤、増粘剤、防錆剤、防凍剤、収縮低減剤、スチールファイバー、ビニロンファイバー、炭素繊維、ワラストナイト繊維等の繊維物質、ポリマー、ベントナイト等の粘土鉱物、並びに、ハイドロタルサイト等のアニオン交換体等のうちの1種又は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, limestone fine powder, blast furnace slow-cooled slag fine powder, sewage sludge incinerated ash and its molten slag, municipal waste incinerated ash and its molten slag, pulp sludge incinerated ash, etc. Admixtures, setting modifiers, antifoaming agents, thickeners, rust inhibitors, antifreeze agents, shrinkage reducing agents, fiber materials such as steel fibers, vinylon fibers, carbon fibers, wollastonite fibers, clays such as polymers and bentonites One or more of minerals and anion exchangers such as hydrotalcite can be used within a range that does not substantially impair the object of the present invention.
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 the respective materials 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、二軸ミキサ、オムニミキサ、パン型ミキサ、遊星型ミキサ、傾胴ミキサ、ヘンシェルミキサ等が使用できる。 As the mixing device, any existing device can be used, and for example, a biaxial mixer, an omni mixer, a pan mixer, a planetary mixer, a tilting mixer, a Henschel mixer, and the like can be used.
本発明で使用する有機-無機複合型塗膜養生剤は、合成樹脂水性分散体、水溶性樹脂、及び膨潤性粘土鉱物を主成分とする、また、さらに、これらと架橋剤とを主成分とするものである。 The organic-inorganic composite-type film curing agent used in the present invention is mainly composed of a synthetic resin aqueous dispersion, a water-soluble resin, and a swellable clay mineral, and further, these and a crosslinking agent as a main component. To do.
本発明で言う合成樹脂水性分散体とは、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、及びその他の共重合可能な単量体の内から一種又は二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等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、及びカセイソーダ等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 referred to in the present invention is generally a synthetic resin emulsion, an aromatic vinyl monomer, an aliphatic conjugated diene monomer, an ethylenically unsaturated fatty acid monomer, and other It can be obtained by emulsion polymerization of one or more of the copolymerizable 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 a monomer to be polymerized is mixed, and an emulsifier, a polymerization initiator, etc. are added to the monomer and the reaction is carried out 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.
水溶性樹脂としては、加工澱粉又はその誘導体、セルロース誘導体、ポリ酢酸ビニルの鹸化物又はその誘導体、スルホン酸基を有する重合体又はその塩、アクリル酸の重合体や共重合体又はこれらの塩、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、及びオキサゾリン基含有重合体等が挙げられ、そのうちの一種又は二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又はイオン性基が10〜60%であることが好ましい。
また、平均分子量は2,000〜1,000,000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 water-soluble resins 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 salts thereof, Examples include acrylamide polymers and copolymers, polyethylene glycol, and oxazoline group-containing polymers, 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 10 to 60% of hydrogen bonding groups or ionic groups per unit weight of the resin.
The average molecular weight is preferably 2,000 to 1,000,000.
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.
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、マイカ、及びベントナイトなどである。これらは天然品、合成品、及び加工処理品のいずれであっても使用可能である。
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、特に、ベントナイトが好ましい。
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50〜5,000のものが好ましい。アスペクト比とは、電子顕微鏡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、固形分に対して、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部を超えると塗膜養生剤の膜の変形能力が低下する場合がある。
Examples of swellable clay minerals include layered silicate minerals belonging to the scumite genus. For example, montmorillonite, beidellite, nontronite, saponite, mica and bentonite. Any of natural products, synthetic products, and processed products can be used.
Among them, clay minerals 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, particularly bentonite 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 50-5,000 is preferable. The aspect ratio is the length / thickness ratio of the clay mineral dispersed in a layer form determined by an electron micrograph.
The amount of the swellable clay mineral used is preferably 1 to 50 parts with respect to the solid content 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, and if it exceeds 50 parts, the film deformability of the film curing agent may be reduced.
架橋剤とは、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、及び水酸基等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)、又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。
A cross-linking agent 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 synthetic resin to crosslink, polymerize (three-dimensional network structure), or hydrophobize. 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、及び膨潤性粘土鉱物を混合して、また、さらに、これらと架橋剤とを反応させて、塗膜養生剤を調製する。 In the present invention, a synthetic resin aqueous dispersion, a water-soluble resin, and a swellable clay mineral are mixed, and these are further reacted with a crosslinking agent to prepare a coating film curing agent.
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。 The method for synthesizing the coating curing agent is preferably a method in which the water-soluble resin and the swellable clay mineral are mixed in water in advance, and then the synthetic resin aqueous dispersion and the crosslinking agent are mixed.
塗膜養生剤の被覆方法は、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。
塗膜養生剤は、高強度コンクリートを打設した後、直ちに表面に塗布するのが好ましい。時間が経つと、コンクリートの表面が乾燥し、プラスチックひび割れが発生する。
このような塗膜養生剤としては、電気化学工業社の「RISフルコート」や、東亞合成社の「CA2」シリーズを用いることができる。
本発明に係る高強度コンクリートに、本発明に係る塗膜養生剤を施すことによって、著しいひび割れ低減効果が発揮され、塩化物イオンの侵入や中性化を抑制でき、凍結融解抵抗性が大きいコンクリート硬化体が得られる。水結合材比が高く、ブリーディングが多い普通コンクリートでは、プラスチックひび割れが起こりにくく、硬化体の空隙量が多いために、塩化物イオンの侵入や中性化を抑制できず、凍結融解抵抗性が小さい。
The coating method of the coating film curing agent is not particularly limited as long as it can form a uniform curing coating film, and can be distributed, applied, or sprayed.
The coating curing agent is preferably applied to the surface immediately after placing high-strength concrete. Over time, the concrete surface dries and plastic cracks occur.
As such a film curing agent, “RIS Full Coat” manufactured by Denki Kagaku Kogyo Co., Ltd. and “CA2” series manufactured by Toagosei Co., Ltd. can be used.
By applying the coating film curing agent according to the present invention to the high-strength concrete according to the present invention, a remarkable crack reducing effect is exhibited, and intrusion and neutralization of chloride ions can be suppressed, and the freeze-thaw resistance is large. A cured product is obtained. In ordinary concrete with a high water binder ratio and a large amount of bleeding, plastic cracking is unlikely to occur, and the amount of voids in the cured product is large. .
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、100g〜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。100g未満ではひび割れ抵抗性の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。 The amount of coating curing agent is not particularly limited, 1 m 2 per is preferably used in a range of 100G~500g, 150 and 400 are more preferred. If it is less than 100 g, the effect of improving crack resistance is not sufficient, and even if it exceeds 500 g, further improvement of the effect cannot be expected.
セメント100部に対し、細骨材200部と、表1に示す混和材を配合し、水結合材(セメント+混和材)比を変えてモルタルを練混ぜた。このとき、モルタルフロー値が200±20mmとなるように、添加量を変えて減水剤を添加した。既設コンクリート板の上に、縦30cm、横30cm、厚さ3cmとなるようにモルタルを打設した後、直ちに有機−無機複合型塗膜養生剤を1m2当たり200g塗布した。材齢7日後にプラスチックひび割れの発生状況を観察した。その後、促進中性化による中性化抵抗性、擬似海水浸漬による塩化物イオンの浸透抵抗性を評価した。
同じ高強度モルタルから作製した4×4×16cm、10×10×40cm供試体にも塗膜剤を同量塗布し、それぞれ材齢91日における圧縮強度試験、凍結融解試験を行った。結果を表1に併記する。
To 100 parts of cement, 200 parts of fine aggregate and an admixture shown in Table 1 were blended, and mortar was mixed by changing the water binder (cement + admixture) ratio. At this time, the water reducing agent was added by changing the addition amount so that the mortar flow value was 200 ± 20 mm. On the existing concrete board, mortar was placed so as to have a length of 30 cm, a width of 30 cm, and a thickness of 3 cm, and then 200 g of organic-inorganic composite type coating curing agent was immediately applied per 1 m 2 . The occurrence of plastic cracks was observed after 7 days of age. Thereafter, neutralization resistance by accelerated neutralization and chloride ion penetration resistance by simulated seawater immersion were evaluated.
The same amount of coating agent was applied to 4 × 4 × 16 cm and 10 × 10 × 40 cm specimens made from the same high-strength mortar, and subjected to a compressive strength test and a freeze-thaw test at 91 days of age, respectively. The results are also shown in Table 1.
<使用材料>
セメント:普通ポルトランドセメント、密度3.16g/cm3、ブレーン比表面積3100cm2/g
細骨材:JIS R 5201準拠の標準砂
混和材A:高炉水砕スラグ微粉末、密度2.90g/cm3、ブレーン比表面積6000cm2/g
混和材B:フライアッシュ、密度2.44g/cm3、ブレーン比表面積4000cm2/g
混和材C:シリカフューム、密度2.44g/cm3、BET比表面積20m2/g
混和材D:市販の高強度混和材、電気化学工業社製「デンカΣ2000」
減水剤:ポリカルボン酸系減水剤
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。
<Materials used>
Cement: Normal Portland cement, density 3.16 g / cm 3 , Blaine specific surface area 3100 cm 2 / g
Fine aggregate: JIS R 5201 compliant standard sand admixture A: ground granulated blast furnace slag, density 2.90 g / cm 3 , Blaine specific surface area 6000 cm 2 / g
Admixture B: fly ash, density 2.44 g / cm 3 , brain specific surface area 4000 cm 2 / g
Admixture C: Silica fume, density 2.44 g / cm 3 , BET specific surface area 20 m 2 / g
Admixture D: Commercially available high-strength admixture, “Denka Σ2000” manufactured by Denki Kagaku Kogyo Co., Ltd.
Water reducing agent: Polycarboxylic acid-based water reducing agent Organic-inorganic composite coating film curing agent: “CA202” manufactured by Toagosei Co., Ltd., acrylic resin-fluorine mica composite type.
<測定方法>
モルタルフロー値:JIS R 5201に準拠した。
ひび割れ抵抗性:ひび割れの本数が2本を越えた場合は×、ひび割れが1〜2本発生した場合は△、ひび割れの発生がない場合は○とした。
圧縮強度:JIS R 5201に準拠した。
促進中性化:材齢14日まで20℃の水中養生を行った後、30℃、相対湿度60%、CO2濃度5%の環境で6ヶ月養生した。硬化体を切断し、断面にフェノールフタレインの1%アルコール溶液を噴霧して赤変しなかった部分を中性化部分と見なして中性化深さを測定した。
塩化物イオンの浸透抵抗性:材齢14日まで20℃の水中養生を行った後、擬似海水に6ヶ月浸漬した。硬化体を切断し、硝酸銀−フルオロセイン法によって塩化物イオンの浸透深さを測定した。
凍結融解試験:材齢28日まで20℃の水中養生を行った後、土木学会基準「コンクリートの凍結融解試験方法」に準拠し、−18〜5℃の振幅で、1サイクル8時間として、300サイクルの凍結融解を行った。300サイクル後の動弾性係数を測定し、試験開始前との相対動弾性係数を算出した。
<Measurement method>
Mortar flow value: Conforms to JIS R 5201.
Crack resistance: x when the number of cracks exceeded two, Δ when one or two cracks occurred, and ○ when no cracks occurred.
Compressive strength: compliant with JIS R 5201.
Accelerated neutralization: After water curing at 20 ° C. until the age of 14 days, it was cured for 6 months in an environment of 30 ° C., 60% relative humidity and 5% CO 2 concentration. The cured body was cut, and a 1% alcohol solution of phenolphthalein was sprayed on the cross section, and the portion that did not turn red was regarded as a neutralized portion, and the neutralization depth was measured.
Resistance to penetration of chloride ions: After water curing at 20 ° C. until the age of 14 days, it was immersed in simulated seawater for 6 months. The cured body was cut, and the penetration depth of chloride ions was measured by the silver nitrate-fluorescein method.
Freezing and thawing test: After water curing at 20 ° C. until the age of 28 days, in accordance with the Japan Society of Civil Engineers standard “Method of freeze and thaw test of concrete”, with an amplitude of −18 to 5 ° C. and 8 hours per cycle, 300 Cycle freeze-thaw was performed. The dynamic elastic modulus after 300 cycles was measured, and the relative dynamic elastic modulus before the start of the test was calculated.
表1から、本発明によれば、ひび割れがなく、塩化物イオンの侵入や中性化を抑制でき、凍結融解抵抗性が大きい高強度コンクリート硬化体が得られることが分かる。 From Table 1, it can be seen that, according to the present invention, a high-strength concrete hardened body that is free from cracks, can suppress intrusion and neutralization of chloride ions, and has high resistance to freezing and thawing can be obtained.
実験No.1-7のモルタルを使用し、表2のように1m2当たりの塗布量を変えて有機−無機複合型塗膜養生剤を塗布したこと以外は実施例1と同様に行った。なお、比較のために、従来の塗膜養生剤を使用した場合についても同様に行った。結果を表2に併記する。 The test was conducted in the same manner as in Example 1 except that the mortar of Experiment No. 1-7 was used and the coating amount per 1 m 2 was changed as shown in Table 2 and the organic-inorganic composite type coating curing agent was applied. In addition, it carried out similarly about the case where the conventional coating film curing agent is used for the comparison. The results are also shown in Table 2.
<使用材料>
従来の塗膜養生剤:市販の塗膜養生剤。EVA系。
<Materials used>
Conventional coating curing agent: Commercial coating curing agent. EVA system.
表2から、本発明によれば、ひび割れがなく、塩化物イオンの侵入や中性化を抑制できる高強度コンクリート硬化体が得られることが分かる。 From Table 2, it can be seen that according to the present invention, there is obtained a high-strength concrete cured body that is free from cracks and that can suppress the intrusion and neutralization of chloride ions.
実験No.1-7のモルタルを使用し、表3に示すように、打設後からの時期を変えて有機−無機複合型塗膜養生剤を1m2当たり200g塗布したこと以外は実施例1と同様に行った。ただし、打設終了後から有機−無機複合型塗膜養生剤を塗布するまでの間、モルタル表面の乾燥を防止する措置を施さなかった。材齢7日後のひび割れ発生状況を確認した。結果を表3に併記する。 Example 1 except that the mortar of Experiment No. 1-7 was used and, as shown in Table 3, the organic-inorganic composite type film curing agent was applied at a rate of 200 g per 1 m 2 at different times after placement. As well as. However, no measures were taken to prevent drying of the mortar surface from the end of placement until the application of the organic-inorganic composite type film curing agent. The occurrence of cracks after 7 days of age was confirmed. The results are also shown in Table 3.
表3から、本発明によれば、ひび割れがない高強度コンクリート硬化体が得られることが分かる。 From Table 3, it can be seen that according to the present invention, a high-strength concrete cured body free from cracks can be obtained.
本発明の高強度コンクリートの処理方法によれば、ひび割れがなく、塩化物イオンの侵入や中性化を抑制でき、凍結融解抵抗性が大きいコンクリート硬化体が得られるので、土木や建築用途に広範に利用できる。 According to the method for treating high-strength concrete of the present invention, a hardened concrete body free from cracks, suppressed intrusion and neutralization of chloride ions, and has a high resistance to freezing and thawing can be obtained. Available to:
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007031047A JP5172164B2 (en) | 2007-02-09 | 2007-02-09 | Method for treating high-strength concrete and hardened high-strength concrete |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007031047A JP5172164B2 (en) | 2007-02-09 | 2007-02-09 | Method for treating high-strength concrete and hardened high-strength concrete |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008194900A true JP2008194900A (en) | 2008-08-28 |
JP5172164B2 JP5172164B2 (en) | 2013-03-27 |
Family
ID=39754299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007031047A Active JP5172164B2 (en) | 2007-02-09 | 2007-02-09 | Method for treating high-strength concrete and hardened high-strength concrete |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5172164B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2522478A3 (en) * | 2011-05-13 | 2014-04-30 | Benno Drössler GmbH & Co, Bauunternehmung KG | Method for producing thin-walled concrete panels and panels obtained by this process |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005162534A (en) * | 2003-12-03 | 2005-06-23 | Denki Kagaku Kogyo Kk | Method for ageing cured cement body |
JP2007001802A (en) * | 2005-06-23 | 2007-01-11 | Denki Kagaku Kogyo Kk | Corrosion resistant composite, and method of manufacturing the same |
-
2007
- 2007-02-09 JP JP2007031047A patent/JP5172164B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005162534A (en) * | 2003-12-03 | 2005-06-23 | Denki Kagaku Kogyo Kk | Method for ageing cured cement body |
JP2007001802A (en) * | 2005-06-23 | 2007-01-11 | Denki Kagaku Kogyo Kk | Corrosion resistant composite, and method of manufacturing the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2522478A3 (en) * | 2011-05-13 | 2014-04-30 | Benno Drössler GmbH & Co, Bauunternehmung KG | Method for producing thin-walled concrete panels and panels obtained by this process |
Also Published As
Publication number | Publication date |
---|---|
JP5172164B2 (en) | 2013-03-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4813148B2 (en) | Organic-inorganic composite type coating curing agent, mortar or concrete using the same, and processing method | |
JP4842050B2 (en) | Section repair material and section repair method | |
JP4593384B2 (en) | Anticorrosive composite and process for producing the same | |
JP4316364B2 (en) | Curing method for hardened cement and method for reducing drying shrinkage of hardened cement | |
JP2011184744A (en) | Anticorrosive construction method of reinforcing bar existing inside reinforced concrete structure | |
JP4642650B2 (en) | Surface coated mortar or concrete | |
JP5697888B2 (en) | Rapid hardening mortar with low electrical resistance, rapid hardening hardened body, and method for preventing corrosion of steel in concrete structure using the same | |
JP5356814B2 (en) | Cement composite and method for forming the same | |
JP5242188B2 (en) | Plastering mortar with low electrical resistance, a hardened body using the same, and a method for preventing corrosion of steel in a concrete structure using the mortar | |
JP5185047B2 (en) | Plastering mortar with low electrical resistance, a hardened body using the same, and a method for preventing corrosion of steel in a concrete structure using the mortar | |
JP5020544B2 (en) | Organic-inorganic composite type coating curing agent, mortar or concrete treatment method using the same, and hardened cement | |
JP5172164B2 (en) | Method for treating high-strength concrete and hardened high-strength concrete | |
JP5308270B2 (en) | Plastering mortar with low electrical resistance, a hardened body using the same, and a method for preventing corrosion of steel in a concrete structure using the mortar | |
JP2010241664A (en) | Cement concrete hardened body, and method for preventing corrosion of steel material in concrete structure using the same | |
JP4744933B2 (en) | Method for treating high fluid mortar or high fluid concrete and hardened cement | |
JP2007119259A (en) | Organic-inorganic composite coating film-curing agent, mortar or concrete using the same, and its treatment method | |
JP5020543B2 (en) | Mortar or concrete processing method and hardened cement | |
JP5078921B2 (en) | Curing method for hardened cement and method for reducing drying shrinkage | |
JP5063965B2 (en) | Composite and production method thereof | |
JP5697357B2 (en) | Spraying mortar with low electrical resistance, mortar hardened body for spraying, and method for preventing corrosion of steel in concrete structure using the same | |
JP5697358B2 (en) | Spraying mortar with low electrical resistance, mortar hardened body for spraying, and method for preventing corrosion of steel in concrete structure using the same | |
JP2011219332A (en) | Quick-hardening mortar for plasterer having small electric resistance, quick-hardening mortar hardened body for the plasterer and corrosion prevention method for steel material inside concrete structure using the same | |
JP5259360B2 (en) | Plastering mortar with low electrical resistance, a hardened body using the same, and a method for preventing corrosion of steel in a concrete structure using the mortar | |
JP4932647B2 (en) | Expandable aggregate and self-disintegrating concrete | |
JP5368680B2 (en) | Organic-inorganic composite type coating curing agent, mortar or concrete treatment method using the same, and hardened cement |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20100105 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20111111 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20111115 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20111226 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20120703 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20120824 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20121218 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20121226 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 5172164 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20160111 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |