WO2022092081A1 - Two material-type ready-mix shipped rapid-hardening concrete material and ready-mix shipped rapid-hardening concrete composition - Google Patents
Two material-type ready-mix shipped rapid-hardening concrete material and ready-mix shipped rapid-hardening concrete composition Download PDFInfo
- Publication number
- WO2022092081A1 WO2022092081A1 PCT/JP2021/039475 JP2021039475W WO2022092081A1 WO 2022092081 A1 WO2022092081 A1 WO 2022092081A1 JP 2021039475 W JP2021039475 W JP 2021039475W WO 2022092081 A1 WO2022092081 A1 WO 2022092081A1
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- WIPO (PCT)
- Prior art keywords
- ready
- concrete
- mixed concrete
- mass
- aluminum
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 200
- 239000004567 concrete Substances 0.000 title claims abstract description 163
- 239000000203 mixture Substances 0.000 title claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 44
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011734 sodium Substances 0.000 claims abstract description 25
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 20
- 239000011593 sulfur Substances 0.000 claims abstract description 20
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 19
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims abstract description 17
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 17
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 17
- 239000011737 fluorine Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 21
- 239000002253 acid Substances 0.000 claims description 19
- 229910001610 cryolite Inorganic materials 0.000 claims description 15
- 230000000147 hypnotic effect Effects 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 13
- 239000006187 pill Substances 0.000 claims description 9
- -1 aluminum ions Chemical class 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000011161 development Methods 0.000 abstract description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910001811 natroalunite Inorganic materials 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 21
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 229910004298 SiO 2 Inorganic materials 0.000 description 13
- 238000004898 kneading Methods 0.000 description 13
- 238000002156 mixing Methods 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 12
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 10
- 241000196324 Embryophyta Species 0.000 description 9
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 9
- 150000008041 alkali metal carbonates Chemical class 0.000 description 9
- 239000002585 base Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 210000004556 brain Anatomy 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- 235000005078 Chaenomeles speciosa Nutrition 0.000 description 5
- 240000000425 Chaenomeles speciosa Species 0.000 description 5
- 230000036571 hydration Effects 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 229910052744 lithium Inorganic materials 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
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 3
- 229930006000 Sucrose Natural products 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000005720 sucrose Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 2
- 239000003326 hypnotic agent Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000006072 paste Substances 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052934 alunite Inorganic materials 0.000 description 1
- 239000010424 alunite Substances 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001934 delay Effects 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
- 150000004683 dihydrates Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- 238000009283 thermal hydrolysis Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/10—Acids or salts thereof containing carbon in the anion
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
- C04B24/06—Carboxylic acids; Salts, anhydrides or esters thereof containing hydroxy groups
-
- 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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/14—Hardening accelerators
Definitions
- the present invention relates to a two-material type ready-mixed concrete shipping type hard concrete material and a ready-mixed concrete shipping type hard concrete composition.
- the pot life is also an important performance for the required performance of hard concrete. Considering the time required for construction by manufacturing ready-mixed concrete at the ready-mixed concrete plant and transporting it to the construction site and the cleaning time of the agitator truck, which is a ready-mixed concrete transport vehicle, it is possible to secure a usable time of at least 120 minutes, preferably 180 minutes or more. desirable. However, securing a long pot life delays the curing time, so that the required strength at short-term material age cannot be satisfied. Therefore, with the conventional technique, it is difficult to satisfy the required strength development at the initial age while ensuring a sufficient pot life.
- hard concrete is actually prepared at the construction site.
- hard concrete is kneaded with a mixer of about 0.1 to 0.2 m3 , and hard concrete is prepared and placed by human wave tactics.
- This method requires a lot of man-hours, requires a lot of man-hours, and is costly, and there is a limit to the volume of hard concrete that can be supplied.
- hard concrete is continuously supplied using a concrete mobile vehicle.
- fine aggregates and coarse aggregates with constant moisture control can be packed in flexible container packs and transported to the site, or hard cement.
- the cost of hardened concrete becomes remarkably high because the man-hours such as packing the concrete in a flexible container pack and transporting it to the site for preparation may increase.
- Patent Document 1 At least one selected from the group consisting of calcium hydroxide, calcium carbonate, calcium aluminate-based compound, calcium silicate-based compound, colloidal silica, Portland cement, calcium sulfate cement, and blast furnace slag.
- a ready-mixed concrete shipping type hardened concrete material using a hardener for ready-mixed concrete shipping type hardened concrete including the above is disclosed.
- Patent Document 1 According to the ready-mixed concrete shipping type hard concrete material of Patent Document 1, it is possible to produce a ready-mixed concrete shipping type hard concrete composition having excellent initial strength development while ensuring sufficient pot life.
- Patent Document 1 shows that when aluminum sulfate is used as a quick-setting agent, aluminum sulfate is instantly bound and the pot life cannot be secured. There was room for further improvement in the initial strength development in a low temperature environment.
- Another object of the present invention is to provide a highly practical two-material ready-mixed concrete shipping type hardened concrete material having excellent initial strength development while ensuring sufficient pot life even in a low temperature environment. do. Another object of the present invention is to provide a ready-mixed concrete shipping type hard concrete material suitable for producing the ready-mixed concrete shipping type hard concrete composition.
- the present inventors prepared concrete mixed with material A containing hardened cement and a sleeping agent at a ready-mixed concrete plant, transported it to the site, and then made aluminum. Practical hard concrete composition with excellent initial strength development while ensuring sufficient pot life even in a low temperature environment by adding and mixing B material consisting of a curing accelerator containing sulfur, sodium, and fluorine. It was discovered that a product could be prepared, and the present invention was completed. That is, the present invention is as follows.
- a material containing a hardened cement and a sleeping pill and a material B composed of a curing accelerator containing aluminum, sulfur, sodium, and fluorine are contained, and the content of natroalnite in the material B is 0.
- Quantitative ratio [Amount of substance of aluminum in B material (mol)] x number of aluminum x valence of aluminum ions / (amount of substance of oxycarboxylic acid contained in sleeping pills (mol) x sleep The valence of the oxycarboxylic acid contained in the agent) [3] Immediately after the preparation of the B material, after storage at 0 to 40 ° C. for 48 hours, the content of the natroalnite in the B material is 5% by mass or less [1] or [2]. ] The two-material type ready-mixed concrete shipping type hard concrete material described in.
- [4] The two-material ready-mixed concrete shipping type hard concrete material according to any one of [1] to [3], wherein the natroalnite contained in the B material is derived from cryolite.
- [5] The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of [1] to [4], wherein the pH of the B material is 1 to 4.
- the aluminum in the B material is 0.1 to 20 parts by mass in terms of Al 2 O 3
- the sulfur is 0.1 to 30 parts by mass in terms of SO 3
- the sodium is 0 .
- the mass ratio (Al 2 O 3 / SO 3 ) of the aluminum in terms of Al 2 O 3 and the sulfur in terms of SO 3 is 0.05 to 1.0 [1] to [8].
- a material containing a hardened cement and a sleeping pill and a material B composed of a curing accelerator containing aluminum, sulfur, sodium, and fluorine are contained, and the content of natroalnite in the material B is 0.
- Ready-mixed concrete shipping type hardened concrete composition in an amount of 3 to 5% by mass.
- the present invention it is possible to provide a highly practical ready-mixed concrete shipping type hardened concrete composition having excellent initial strength development while ensuring a sufficient pot life even in a low temperature environment. Further, it is possible to provide a two-material type ready-mixed concrete shipping type hard concrete material suitable for producing the ready-mixed concrete shipping type hard concrete composition.
- composition in the present specification is a general term for a cement composition, a mortar composition, and a concrete composition.
- the two-material ready-mixed concrete shipping type hard concrete material of the present embodiment includes material A containing hard cement and a sleeping agent, aluminum, sulfur, sodium, and It is composed of at least two materials including a B material made of a curing accelerator containing fluorine.
- the “ready-mixed concrete shipping type hard concrete” in the present embodiment means that after kneading ready-mixed concrete (ready-mixed concrete) at a ready-mixed concrete factory or a ready-mixed concrete plant, it is transported by an agitator truck or the like to a civil engineering work site, a construction site, or the like. Concrete that is shipped to the construction site and hardens relatively quickly after driving.
- ready-mixed concrete shipping type hard concrete at least 120 minutes or more is required from shipment to completion of work due to the transportation time, and if the transportation distance is long, 180 minutes or more is secured. It is desirable to do. This embodiment is specifically used for such applications.
- the above-mentioned "agitator truck” is a freight vehicle equipped with a mixing drum (mixing container) on the loading platform, which can transport ready-mixed concrete while stirring, and there is no big difference in its functions.
- mixing drum mixing container
- the hypnotic in the material A puts the ready-mixed concrete shipping type hardened concrete to sleep, that is, the hydration hardening is almost stopped. This makes it possible to secure pot life. Further, by adding a hardening accelerator containing aluminum, sulfur, sodium, and fluorine in the B material, the hydration hardening of the hardened concrete to which a large amount of sleeping pill is added and put to sleep is awakened again at the construction site. Then, excellent initial strength development can be obtained by other components such as a hardened material. Condensation and hardening will proceed by adding the B material, but it is necessary to secure a working time even after the addition of the B material, and it is necessary to secure a pot life of at least 15 minutes or more.
- the content of natroalnite in the B material exceeds a certain amount, the rapid hardness that the curing accelerator can exert is hindered, which makes it difficult to exhibit good workability.
- the content of natroalnite in the B material is examined and the range is set to the range of 0.3 to 5% to secure a sufficient pot life even in a low temperature environment.
- excellent initial strength development was achieved.
- the B material is excellent in handleability and can be used in either a liquid form or a solid form (preferably powder), the form can be selected according to the construction site and the situation, and the practicality is high.
- the B material and the A material will be described in detail.
- the B material according to the embodiment of the present invention is a curing accelerator containing aluminum, sulfur, sodium, and fluorine.
- the B material as a curing accelerator contains these, it is possible to improve the rapid hardness and strength development even in a low temperature environment.
- the B material according to the present embodiment has a content of natroalnite in the B material of 5% or less.
- the content of natroalnite is preferably 4% or less, more preferably 3% or less. It is preferable that there is no natroalnite, but since it is produced by thermal hydrolysis, it may actually be present in an amount of about 0.3%.
- the content of natroalnite is 5% or less at least immediately after the preparation of the B material and after storage at 0 to 40 ° C. for 48 hours. If the content of natroalnite is 5% or less at this point, the rapid hardening inhibition by natroalnite is suppressed by the subsequent storage at 0 to 40 ° C. It should be noted that "0 to 40 ° C.” assumes a temperature range when the B material is actually used. The content of natroalnite can be measured by the method described in the examples.
- Natroalunite is also referred to as soda alunite, and is (NaAl 3 (SO 4 ) 2 (OH) 6 , (Na, K) Al 3 (SO 4 ) 2 (OH) 6 or , [Na + ] [Al 3+ ] [Al 3 + 2 ] [(OH) 6
- natroalnite is mainly derived from cryolite, which is a raw material, and in particular, thiolite (Na 5 Al 3 F 14 ) and elpasolite (K 2 NaAlF) in cryolite. It has been found that it is derived from 6 ).
- treatment such as reducing thiolite and elpasolite in cryolite may be performed. Further, as will be described later, the temperature conditions for producing the B material may be adjusted.
- the B material according to the present embodiment is preferably acidic, and more preferably has a pH of 1 to 4. Since the material B is acidic, the handleability is improved as compared with the basic curing accelerator. In order to keep the pH of the B material within the above range, it is advisable to add water, sulfuric acid or the like to adjust the pH.
- the contents of aluminum, sulfur, sodium, and fluorine in the B material are not particularly limited, and from the viewpoint of rapid hardness, aluminum is converted to Al 2 O 3 in an amount of 0.1 to 20 parts, and sulfur is converted into SO 3 . It is preferable that the amount is 0.1 to 30 parts, sodium is 0.01 to 5 parts in terms of Na 2O , and fluorine is 0.01 to 10 parts. It is more preferable that the amount of aluminum is 0.1 to 10 parts in terms of Al 2 O 3 . Sulfur is more preferably 0.1 to 10 parts in terms of SO 3 . It is more preferable that sodium is 0.01 to 2 parts in terms of Na 2 O. Fluorine is more preferably 0.01 to 2 parts.
- the mass ratio of aluminum in terms of Al 2 O 3 and sulfur in terms of SO 3 is preferably 0.05 to 1.0, more preferably 0.1 to 0.8.
- the solid content concentration of the B material according to the present embodiment is preferably 20 to 70%, preferably 23 to 60%, from the viewpoint of storage stability of the curing accelerator and mixing property when added to paste, mortar, and concrete. % Is more preferable.
- the viscosity of the B material according to the present embodiment at 20 ° C. is preferably 1,400 mPa ⁇ s or less, and more preferably 1 to 1,000 mPa ⁇ s.
- the viscosity is 1,400 mPa ⁇ s or less, the mixing property is enhanced and stable physical properties can be obtained.
- the viscosity can be measured by the method described in the examples.
- the stoichiometric ratio of the hypnotic and the B material which will be described later, is examined, and the range is set to the range of 0.5 to 5, so that a sufficient pot life is secured and excellent initial strength is exhibited. Realized the sex.
- the stoichiometric ratio is expressed by the following equation (1).
- the formula (1) means the ratio of the B material, which is a curing accelerator, to the hypnotic in the concrete containing the hypnotic and the B material, and the ratio is in the range of 0.5 to 5. If this ratio is too low, the amount of sleeping pills is too large to obtain rapid hardness, and if this ratio is too high, the amount of B material is excessive and the concrete is instantly bound.
- Quantitative ratio [Amount of substance of aluminum in B material (mol)] x number of aluminum x valence of aluminum ions / (amount of substance of oxycarboxylic acid contained in sleeping pills (mol) x sleep The valence of the oxycarboxylic acid contained in the agent)
- Material B acts on citric acid, which is a hypnotic retarder.
- aluminum ion acts as a trivalent acid
- aluminum sulfate has two Als
- the B material according to the present embodiment is prepared by using raw materials such as aluminum sulfate, various alums, aluminum hydroxide, sodium hydroxide, sulfuric acid, natural or synthetic cryolite, sodium fluoride, and aluminum fluoride in a liquid. It can be prepared by mixing and heating at 80 to 95 ° C. for 30 to 120 minutes. From the viewpoint of good productivity, it is preferable to use sulfuric acid, aluminum hydroxide, aluminum sulfate or various alums and natural or synthetic cryolite as raw materials. Further, it is preferable to use water or the like as the liquid.
- cryolite is used as a raw material for producing the B material according to the present embodiment, insoluble precipitates are likely to be generated.
- thiolite and elpasolite contained in cryolite contribute to the generation of insoluble precipitates. It was also found that the generation of insoluble precipitates was suppressed by performing a specific operation when producing the curing accelerator. In consideration of any of these, it is preferable to perform the following operations (1) or (2), for example, in order to reduce the content of natroalnite in the B material to 5% or less.
- cryolite When cryolite is used as the raw material, the amount of thiolite and elpasolite contained in the cryolite is 5% or less in the cryolite. (2) After heating at 80 to 95 ° C. as described above, the mixture is rapidly cooled to room temperature (for example, 25 ° C.) within 60 minutes.
- the B material produced as described above is suitable for ready-mixed concrete shipping type hardened concrete as described later.
- Material A contains hardened cement and hypnotics.
- the hypnotic used in this embodiment has a function of putting the hard concrete shipped from the ready-mixed concrete to sleep (almost stopping the hydration hardening), and is used for hard-hardening troubles in the ready-mixed concrete plant or when transporting by an agitator truck. This is to avoid the sudden hard trouble of.
- the sleeping agent include oxycarboxylic acid or a salt thereof, a combination thereof with an alkali metal carbonate, saccharides, boric acid and the like.
- the combined use of oxycarboxylic acid and alkali metal carbonate is preferable from the viewpoint of the large effect of putting the hardened concrete to sleep and the good strength development after the addition of the B material.
- only alkali metal carbonates that are not used in combination with oxycarboxylic acid do not serve as hypnotics.
- the base concrete means concrete which at least made by kneading hard cement, hypnotic, aggregate, and kneading water.
- the sleeping agent preferably contains a mixture of oxycarboxylic acid, an alkali metal carbonate other than lithium and an oxycarboxylic acid, and more preferably contains a mixture of an alkali metal carbonate other than lithium and an oxycarboxylic acid.
- the mixing ratio (mass ratio) of the alkali metal carbonate other than lithium and the oxycarboxylic acid is preferably 10/90 to 90/10 for the alkali metal carbonate / oxycarboxylic acid, and is preferably 20/80 to 80/10. 20 is more preferable.
- Examples of the oxycarboxylic acid include oxycarboxylic acid or a salt thereof, examples of the oxycarboxylic acid include citric acid, gluconic acid, tartrate acid, and malic acid, and examples thereof include sodium salt, potassium salt, and calcium salt. Examples include magnesium salts. One or more of these may be used in combination.
- the content of the hypnotic is preferably 0.3 to 5 parts, more preferably 0.3 to 4.5 parts, with respect to 100 parts of the hardened cement. With 0.3 to 5 copies, it is easy to secure sufficient working time in addition to the transportation time to the site. In addition, when the B material is added, hydration hardening is likely to occur again.
- Hard-hardened cement is a cement for hard-hardened concrete that develops a compressive strength of 24 N / mm 2 or more at a material age of 3 hours. It is roughly divided. Above all, the use of calcium aluminate-based hardened cement is preferable from the viewpoint of reducing slump loss.
- Calcium aluminumate-based hardened cement is a mixture of cement, hardened material, and a setting agent, and the hardened material is composed of a calcium aluminate-based compound and succulents.
- cement in the present embodiment is not particularly limited, but is, for example, various types of normal, fast-strength, moderate-heat, and low-heat Portoland cement, blast furnace slag, and fly ash defined by the Japanese Industrial Standards (JIS). , Various mixed cements mixed with silica, filler cements mixed with limestone powder and blast furnace slow-cooled slag fine powder, and environment-friendly cement (eco-cement) manufactured from urban waste incineration ash and sewage sludge incineration ash. ) And all other cements. In addition, cement defined by EN197-2000 overseas and all cements defined by the Chinese GB standard can be mentioned, and one or more of these can be used.
- the constituent compounds of Portland cement are alite (3CaO ⁇ SiO 2 ), belite (2CaO ⁇ SiO 2 ), aluminate (3CaO ⁇ Al 2 O 3 ), and ferrite (4 CaO ⁇ Al 2 O 3 ⁇ Fe 2 O 3 ).
- two-water cement is mixed (a part of this may change to semi-water cement).
- cement corresponding to this include early-strength cement and ordinary cement, for example, Japanese cement.
- PII ⁇ 52.5 and PII ⁇ 42.5 can be mentioned.
- the hardened material of the present embodiment is preferably composed of a calcium aluminate-based compound and sucrose.
- the calcium aluminate-based compound is a general term for compounds mainly composed of CaO and Al2O3 , and is not particularly limited. Specific examples thereof include CaO / Al 2O 3 , 12CaO / 7Al 2O 3 , 11CaO / 7Al 2O3 / CaF2 , 3CaO / Al2O3 , 3CaO / 3Al2O3 / CaSO 4 , and further, CaO.
- an amorphous substance mainly composed of Al 2 O 3 for example, CaO-Al 2 O 3 -SiO 2 system compound
- the degree of amorphousness in this embodiment is defined as follows.
- the target substance is annealed at 1000 ° C. for 2 hours and then slowly cooled at a cooling rate of 5 ° C./min to crystallize.
- the crystallized material is measured by powder X-ray diffraction method, and the area S0 of the main peak of the crystalline mineral is obtained.
- the degree of amorphousness X is obtained from the main peak area S of the crystal of the substance before annealing by the following formula.
- X (%) 100 ⁇ (1-S / S 0 )
- the hardened material contains CaO-Al 2 O 3-SiO 2 system compound and sucrose, and the amorphous degree of this CaO-Al 2 O 3 -SiO 2 system compound is 70% or more, and the degree of amorphousness is 70% or more.
- SiO 2 is preferably in the range of 1 to 18%. More preferably, the degree of amorphousness of the CaO-Al 2 O 3 -SiO 2 compound is 80% or more, and the SiO 2 is in the range of 2 to 13%.
- the calcium aluminate-based compound is preferably adjusted to a brain specific surface area of 3,000 to 9,000 cm 2 / g by pulverization treatment, and more preferably adjusted to 4,000 to 8,000 cm 2 / g.
- the degree of powderiness (brain specific surface area) of the calcium aluminate compound is 4,000 to 9,000 cm 2 / g, it becomes easy to obtain sufficient rapid hardness, and it becomes easy to obtain strength development at low temperature. ..
- the hardened material of the present embodiment is preferably adjusted to a brain specific surface area of 3,000 to 9,000 cm 2 / g by pulverization treatment, and is adjusted to 4,000 to 8,000 cm 2 / g. Is more preferable.
- the powderiness of the hardened material is 3,000 to 9,000 cm 2 / g, it becomes easy to obtain sufficient ultrafast hardness, and it becomes easy to obtain strength development at low temperature.
- the content of the hardened material is preferably 10 to 35 parts, more preferably 15 to 30 parts, still more preferably 20 to 25 parts out of a total of 100 parts of the cement and the hardened material.
- the content is 10 to 35 parts, good initial strength development is easily obtained, and long-term strength is less likely to decrease.
- any sequel such as anhydrous sequel, semi-water sequel, and dihydrate sequel can be used.
- natural sequels chemical sewage such as phosphoric acid by-product sewage, excretion sewage, and hydrofluoric acid by-product sewage, or sewage obtained by heat-treating these can also be used.
- anhydrous'boke's and / or semi-hydrous'boke's are preferable in terms of strength development, but it is desirable to select anhydrous'boke's from the viewpoint of cost, and type II anhydrous'boke's and / or natural'boke's are preferable.
- the particle size of the sequel is preferably 3,000 cm 2 / g or more in terms of brain value, and more preferably 4,000 to 7,000 cm 2 / g. When it is 3,000 cm 2 / g or more, the initial strength development can be satisfactorily exhibited.
- the amount of the sucrose used is preferably 10 to 200 parts, more preferably 15 to 150 parts, still more preferably 20 to 130 parts with respect to 100 parts of the calcium aluminate compound. When the amount of sequel used is within these ranges, the strength development can be satisfactorily exhibited.
- sleeping agent in addition to the above-mentioned hardener, sleeping agent, aluminum, sulfur, sodium, and curing accelerator containing fluorine, an expansion material, a water reducing agent, an AE water reducing agent, a high-performance water reducing agent, and a blast furnace slow cooling.
- Slag such as slag fine powder and blast furnace slow cooling slag fine powder, admixture materials such as limestone fine powder, fly ash and silica fume, defoaming agent, thickener, rust preventive, antifreeze, shrinkage reducing agent, polymer, bentonite, etc.
- the ready-mixed concrete shipping type hard concrete composition according to the present embodiment contains A material containing hard cement and a sleeping agent, and aluminum, sulfur, sodium, and fluorine to promote curing. It is made by mixing with B material made of an agent. The content of natroalnite in the B material is 0.3 to 5%. The preferred range and the like are the same as those mentioned in "Two-material type ready-mixed concrete shipping type hardened concrete material".
- the B material In the ready-mixed concrete plant, it is necessary to prepare various base concretes mixed with the A material, and the B material needs to be added and mixed with the various base concretes after being transported to the site. If the B material is mixed with various base concretes in advance at the ready-mixed concrete plant instead of at the construction site, the pot life cannot be secured. Further, if both the hardened material and the B material are added at the ready-mixed concrete factory, the pot life becomes extremely short, and the concrete is forced to be discarded during the transportation. When the B material is added at the ready-mixed concrete factory and the hardened material is added at the construction site, the pot life after adding the hardened material becomes extremely short, 10 minutes or less, and the construction cannot be performed.
- the pot life is shortened, the compressive strength is low, and only about 30% of the drum volume of the agitator can be conveyed.
- the timing of adding the A material and the B material is extremely important.
- the base concrete mixed with A material is transported to the construction site at the ready-mixed concrete plant, and B at the construction site.
- the ready-mixed concrete shipping type hardened concrete composition of the present embodiment can be obtained.
- Preparation method for ready-mixed concrete shipping type hard concrete In the embodiment of the method for preparing ready-mixed concrete for shipping ready-mixed concrete of the present invention, at least material A is kneaded together with kneading water in a kneading container to form a base concrete (kneading step), and further, material B is used.
- kneading step the process of mixing at the construction site is sequentially included.
- the kneaded water is supplied from, for example, a ready-mixed concrete factory or a ready-mixed concrete plant. Further, in the kneading process, transportation is often performed together with kneading.
- the capacity of the base concrete containing the material A and the kneading water is preferably 40% by volume or more, preferably 50% by volume or more of the internal volume of the kneading (transporting) container. More preferred.
- the kneading (transporting) container is a container provided in a ready-mixed concrete transport vehicle such as a drum of an agitator truck and capable of holding the ready-mixed concrete while stirring.
- the type of B material and the above-mentioned stoichiometric ratio within an appropriate range so that the pot life after mixing the B material can be secured for 10 minutes or more, preferably 15 minutes or more.
- the kneaded material is transported and shipped to the construction site, and after the driving work. Suitable for use as an added material.
- the pot life can be set to, for example, 120 minutes or more, preferably 180 minutes or more.
- natroalnite 50 g of the stored B material was flowed through a glass filter, suction-filtered, and further dried in a vacuum desiccator for 24 hours, and X-ray diffraction was measured. The peak intensity of natroalnite alone was compared with the peak intensity of natroalnite in the sample, and the content was determined.
- s / a is a fine aggregate ratio, which is a value expressed as a percentage of the absolute volume ratio of the fine aggregate amount to the total aggregate amount in concrete.
- the environmental temperature was 20 ° C.
- the stoichiometric ratio was calculated from the above equation (1).
- ⁇ Material used> -Hard material An equal amount mixture of CaO-Al 2 O 3 -SiO 2 amorphous substance and anhydrous secco.
- CaO-Al 2 O 3 -SiO 2 amorphous substance CaO is 43%, Al 2 O 3 is 44%, SiO 2 is 10%, and others are 3%.
- the two-material ready-mixed concrete shipping type hard concrete material and the ready-mixed concrete shipping type hard concrete composition of the present invention have excellent initial strength development while ensuring sufficient pot life even in a low temperature environment. It is suitably used in the field of civil engineering and construction.
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Abstract
Provided is a two material-type ready-mix shipped rapid-hardening concrete material that is suitable for manufacturing a ready-mix shipped rapid-hardening concrete composition with high practicality, said composition showing excellent initial strength development while ensuring a sufficient pot life even in a low-temperature environment. The two material-type ready-mix shipped rapid-hardening concrete material according to the present invention comprises material A that contains a rapid-hardening cement and a sleeping agent and material B that comprises a hardening accelerator containing aluminum, sulfur, sodium and fluorine, wherein the material B has a natroalunite content of 0.3-5 mass%.
Description
本発明は、２材型の生コン出荷型急硬コンクリート材料及び生コン出荷型急硬コンクリート組成物に関する。
The present invention relates to a two-material type ready-mixed concrete shipping type hard concrete material and a ready-mixed concrete shipping type hard concrete composition.
世界的に見るとセメントの生産量は増加しており、急速にインフラ整備が進められている。特に、中国や東南アジアでの建設ラッシュは現在も続いている。インフラ整備の中でも、道路整備は重要な位置付けにある。道路は新設の際にも、また、補修の際にも、早期解放が望まれるため、使用する材料としても早期供用を可能とする材料が求められている。その一例として、急硬コンクリートが挙げられる。
Globally, cement production is increasing, and infrastructure development is progressing rapidly. In particular, the construction rush in China and Southeast Asia is still ongoing. Road maintenance is in an important position in infrastructure development. Since early release of roads is desired both when constructing new roads and when repairing roads, materials that enable early service are required as materials to be used. One example is hard concrete.
急硬コンクリートの要求性能としては、可使時間も重要な性能となる。生コンプラントで生コンを製造し、施工現場まで搬送し、施工にかかる時間や生コン運搬車であるアジテータ車の洗浄時間も考慮すると、最低でも１２０分以上、できれば１８０分以上の可使時間の確保が望ましい。しかしながら、可使時間を長く確保することは、硬化時間を遅らせることになるため、短期材齢での要求強度を満たすことができなくなる。このため、従来の技術では、十分な可使時間を確保しつつ、初期材齢で必要な強度発現性を満たすことは困難であった。
The pot life is also an important performance for the required performance of hard concrete. Considering the time required for construction by manufacturing ready-mixed concrete at the ready-mixed concrete plant and transporting it to the construction site and the cleaning time of the agitator truck, which is a ready-mixed concrete transport vehicle, it is possible to secure a usable time of at least 120 minutes, preferably 180 minutes or more. desirable. However, securing a long pot life delays the curing time, so that the required strength at short-term material age cannot be satisfied. Therefore, with the conventional technique, it is difficult to satisfy the required strength development at the initial age while ensuring a sufficient pot life.
現在、急硬コンクリートは、施工現場で調製されているのが実情である。少量の打設量の工事では、０．１～０．２ｍ３程度のミキサで急硬コンクリートを練り混ぜ、人海戦術で急硬コンクリートの調製と打設を行っている。この方法では、人手が多く必要となり工数が嵩みコスト高である上に、供給できる急硬コンクリートのボリュームに限界があった。また、打設量の多い工事では、コンクリートモービル車を用いて急硬コンクリートを連続して供給している。しかしながら、この方法では、コンクリートモービル車を手配しなければならないことに加えて、予め、水分を一定に管理した細骨材や粗骨材をフレコンパックに詰めて現場に搬送したり、急硬セメントをフレコンパックに詰めて現場に搬送して準備しておいたり等の工数が嵩むこともあり、急硬コンクリートのコストが著しく高くなるという課題があった。また、コンクリートモービル車の手配にも限界があった。
Currently, hard concrete is actually prepared at the construction site. For construction work with a small amount of casting, hard concrete is kneaded with a mixer of about 0.1 to 0.2 m3 , and hard concrete is prepared and placed by human wave tactics. This method requires a lot of man-hours, requires a lot of man-hours, and is costly, and there is a limit to the volume of hard concrete that can be supplied. In addition, in construction with a large amount of casting, hard concrete is continuously supplied using a concrete mobile vehicle. However, in this method, in addition to having to arrange a concrete mobile vehicle, fine aggregates and coarse aggregates with constant moisture control can be packed in flexible container packs and transported to the site, or hard cement. There is a problem that the cost of hardened concrete becomes remarkably high because the man-hours such as packing the concrete in a flexible container pack and transporting it to the site for preparation may increase. There was also a limit to the arrangement of concrete mobile cars.
今日では、生コンプラントから出荷できる急硬コンクリートの開発が強く望まれている。生コンプラントから急硬コンクリートを出荷できれば、既存の練り混ぜ設備や搬送システムをそのまま活用して大量の急硬コンクリートを施工現場に供給できる。
Today, there is a strong demand for the development of hard concrete that can be shipped from ready-mixed concrete. If hard concrete can be shipped from a ready-mixed concrete plant, a large amount of hard concrete can be supplied to the construction site by utilizing the existing mixing equipment and transfer system as it is.
例えば特許文献１では、水酸化カルシウム、炭酸カルシウム、カルシウムアルミネート系化合物、カルシウムシリケート系化合物、コロイダルシリカ、ポルトランドセメント、カルシウムサルフォアルミネートセメント、及び高炉スラグからなる群から選択される少なくとも１種を含む生コン出荷型急硬コンクリート用起硬剤を用いた生コン出荷型急硬コンクリート材料が開示されている。
For example, in Patent Document 1, at least one selected from the group consisting of calcium hydroxide, calcium carbonate, calcium aluminate-based compound, calcium silicate-based compound, colloidal silica, Portland cement, calcium sulfate cement, and blast furnace slag. A ready-mixed concrete shipping type hardened concrete material using a hardener for ready-mixed concrete shipping type hardened concrete including the above is disclosed.
特許文献１の生コン出荷型急硬コンクリート材料によれば、十分な可使時間を確保しつつ、初期の強度発現性に優れた生コン出荷型急硬コンクリート組成物を製造することができる。しかしながら、特許文献１には急結剤として硫酸アルミニウムを用いると瞬結してしまい可使時間を確保できないことが示されている。そして、低温環境下における初期の強度発現性については、更なる改良の余地があった。
According to the ready-mixed concrete shipping type hard concrete material of Patent Document 1, it is possible to produce a ready-mixed concrete shipping type hard concrete composition having excellent initial strength development while ensuring sufficient pot life. However, Patent Document 1 shows that when aluminum sulfate is used as a quick-setting agent, aluminum sulfate is instantly bound and the pot life cannot be secured. There was room for further improvement in the initial strength development in a low temperature environment.
以上から、本発明は、低温環境下でも十分な可使時間を確保しつつ、初期の強度発現性に優れる実用性の高い２材型の生コン出荷型急硬コンクリート材料を提供することを目的とする。また、当該生コン出荷型急硬コンクリート組成物を製造するために好適な生コン出荷型急硬コンクリート材料を提供することを目的とする。
From the above, it is an object of the present invention to provide a highly practical two-material ready-mixed concrete shipping type hardened concrete material having excellent initial strength development while ensuring sufficient pot life even in a low temperature environment. do. Another object of the present invention is to provide a ready-mixed concrete shipping type hard concrete material suitable for producing the ready-mixed concrete shipping type hard concrete composition.
そこで、本発明者らは、上記課題を解決すべく、種々努力を重ねた結果、急硬セメント及び眠剤を含むＡ材を混合したコンクリートを生コンプラントで調製し、現場まで搬送後、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材を添加混合することにより、低温環境下でも十分な可使時間を確保しつつ、初期の強度発現性に優れる実用的な急硬コンクリート組成物を調製できることを知見し、本発明を完成するに至った。すわち、本発明は下記のとおりである。
Therefore, as a result of various efforts to solve the above problems, the present inventors prepared concrete mixed with material A containing hardened cement and a sleeping agent at a ready-mixed concrete plant, transported it to the site, and then made aluminum. Practical hard concrete composition with excellent initial strength development while ensuring sufficient pot life even in a low temperature environment by adding and mixing B material consisting of a curing accelerator containing sulfur, sodium, and fluorine. It was discovered that a product could be prepared, and the present invention was completed. That is, the present invention is as follows.
［１］急硬セメント及び眠剤を含むＡ材と、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とを含み、前記Ｂ材中のナトロアルナイトの含有量が０．３～５質量％である２材型の生コン出荷型急硬コンクリート材料。
［２］下記式（１）で表される前記眠剤と前記Ｂ材との量論比が０．５～５である［１］に記載の２材型の生コン出荷型急硬コンクリート材料。
式（１）：量論比＝［Ｂ材中アルミニウムの物質量（ｍｏｌ）］×アルミニウムの数×アルミニウムイオンの価数／（眠剤に配合されるオキシカルボン酸の物質量（ｍｏｌ）×眠剤に配合されるオキシカルボン酸の価数）
［３］前記Ｂ材作製の直後から、０～４０℃で４８時間保存した後であって、前記Ｂ材中の前記ナトロアルナイトの含有量が５質量％以下である［１］又は［２］に記載の２材型の生コン出荷型急硬コンクリート材料。
［４］前記Ｂ材に含有されるナトロアルナイトが氷晶石に由来する［１］～［３］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［５］前記Ｂ材のｐＨが１～４である［１］～［４］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［６］前記Ｂ材中の前記アルミニウムがＡｌ２Ｏ３換算で０．１～２０質量部、前記硫黄がＳＯ３換算で０．１～３０質量部、前記ナトリウムがＮａ２Ｏ換算で０．０１～５質量部、及び前記フッ素が０．０１～１０質量部である［１］～［５］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［７］前記Ｂ材の固形分濃度が２０～７０質量％である［１］～［６］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［８］前記Ｂ材の２０℃における粘度が１，４００ｍＰａ・ｓ以下である［１］～［７］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［９］Ａｌ２Ｏ３換算での前記アルミニウムとＳＯ３換算での前記硫黄との質量比（Ａｌ２Ｏ３／ＳＯ３）が０．０５～１．０である［１］～［８］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［１０］急硬セメント及び眠剤を含むＡ材と、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とを含み、前記Ｂ材中のナトロアルナイトの含有量が０．３～５質量％である生コン出荷型急硬コンクリート組成物。 [1] A material containing a hardened cement and a sleeping pill and a material B composed of a curing accelerator containing aluminum, sulfur, sodium, and fluorine are contained, and the content of natroalnite in the material B is 0. A two-material type ready-mixed concrete shipping type hardened concrete material with a weight of 3 to 5% by mass.
[2] The two-material type ready-mixed concrete shipping type hardened concrete material according to [1], wherein the stoichiometric ratio of the hypnotic represented by the following formula (1) to the material B is 0.5 to 5.
Formula (1): Quantitative ratio = [Amount of substance of aluminum in B material (mol)] x number of aluminum x valence of aluminum ions / (amount of substance of oxycarboxylic acid contained in sleeping pills (mol) x sleep The valence of the oxycarboxylic acid contained in the agent)
[3] Immediately after the preparation of the B material, after storage at 0 to 40 ° C. for 48 hours, the content of the natroalnite in the B material is 5% by mass or less [1] or [2]. ] The two-material type ready-mixed concrete shipping type hard concrete material described in.
[4] The two-material ready-mixed concrete shipping type hard concrete material according to any one of [1] to [3], wherein the natroalnite contained in the B material is derived from cryolite.
[5] The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of [1] to [4], wherein the pH of the B material is 1 to 4.
[6] The aluminum in the B material is 0.1 to 20 parts by mass in terms of Al 2 O 3 , the sulfur is 0.1 to 30 parts by mass in terms of SO 3 , and the sodium is 0 . The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of [1] to [5], wherein 01 to 5 parts by mass and the above-mentioned fluorine is 0.01 to 10 parts by mass.
[7] The two-material ready-mixed concrete shipping type hard concrete material according to any one of [1] to [6], wherein the solid content concentration of the B material is 20 to 70% by mass.
[8] The two-material ready-mixed concrete shipping type hard concrete material according to any one of [1] to [7], wherein the viscosity of the B material at 20 ° C. is 1,400 mPa · s or less.
[9] The mass ratio (Al 2 O 3 / SO 3 ) of the aluminum in terms of Al 2 O 3 and the sulfur in terms of SO 3 is 0.05 to 1.0 [1] to [8]. The two-material type ready-mixed concrete shipping type hardened concrete material described in any of the above.
[10] A material containing a hardened cement and a sleeping pill and a material B composed of a curing accelerator containing aluminum, sulfur, sodium, and fluorine are contained, and the content of natroalnite in the material B is 0. Ready-mixed concrete shipping type hardened concrete composition in an amount of 3 to 5% by mass.
［２］下記式（１）で表される前記眠剤と前記Ｂ材との量論比が０．５～５である［１］に記載の２材型の生コン出荷型急硬コンクリート材料。
式（１）：量論比＝［Ｂ材中アルミニウムの物質量（ｍｏｌ）］×アルミニウムの数×アルミニウムイオンの価数／（眠剤に配合されるオキシカルボン酸の物質量（ｍｏｌ）×眠剤に配合されるオキシカルボン酸の価数）
［３］前記Ｂ材作製の直後から、０～４０℃で４８時間保存した後であって、前記Ｂ材中の前記ナトロアルナイトの含有量が５質量％以下である［１］又は［２］に記載の２材型の生コン出荷型急硬コンクリート材料。
［４］前記Ｂ材に含有されるナトロアルナイトが氷晶石に由来する［１］～［３］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［５］前記Ｂ材のｐＨが１～４である［１］～［４］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［６］前記Ｂ材中の前記アルミニウムがＡｌ２Ｏ３換算で０．１～２０質量部、前記硫黄がＳＯ３換算で０．１～３０質量部、前記ナトリウムがＮａ２Ｏ換算で０．０１～５質量部、及び前記フッ素が０．０１～１０質量部である［１］～［５］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［７］前記Ｂ材の固形分濃度が２０～７０質量％である［１］～［６］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［８］前記Ｂ材の２０℃における粘度が１，４００ｍＰａ・ｓ以下である［１］～［７］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［９］Ａｌ２Ｏ３換算での前記アルミニウムとＳＯ３換算での前記硫黄との質量比（Ａｌ２Ｏ３／ＳＯ３）が０．０５～１．０である［１］～［８］のいずれかに記載の２材型の生コン出荷型急硬コンクリート材料。
［１０］急硬セメント及び眠剤を含むＡ材と、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とを含み、前記Ｂ材中のナトロアルナイトの含有量が０．３～５質量％である生コン出荷型急硬コンクリート組成物。 [1] A material containing a hardened cement and a sleeping pill and a material B composed of a curing accelerator containing aluminum, sulfur, sodium, and fluorine are contained, and the content of natroalnite in the material B is 0. A two-material type ready-mixed concrete shipping type hardened concrete material with a weight of 3 to 5% by mass.
[2] The two-material type ready-mixed concrete shipping type hardened concrete material according to [1], wherein the stoichiometric ratio of the hypnotic represented by the following formula (1) to the material B is 0.5 to 5.
Formula (1): Quantitative ratio = [Amount of substance of aluminum in B material (mol)] x number of aluminum x valence of aluminum ions / (amount of substance of oxycarboxylic acid contained in sleeping pills (mol) x sleep The valence of the oxycarboxylic acid contained in the agent)
[3] Immediately after the preparation of the B material, after storage at 0 to 40 ° C. for 48 hours, the content of the natroalnite in the B material is 5% by mass or less [1] or [2]. ] The two-material type ready-mixed concrete shipping type hard concrete material described in.
[4] The two-material ready-mixed concrete shipping type hard concrete material according to any one of [1] to [3], wherein the natroalnite contained in the B material is derived from cryolite.
[5] The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of [1] to [4], wherein the pH of the B material is 1 to 4.
[6] The aluminum in the B material is 0.1 to 20 parts by mass in terms of Al 2 O 3 , the sulfur is 0.1 to 30 parts by mass in terms of SO 3 , and the sodium is 0 . The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of [1] to [5], wherein 01 to 5 parts by mass and the above-mentioned fluorine is 0.01 to 10 parts by mass.
[7] The two-material ready-mixed concrete shipping type hard concrete material according to any one of [1] to [6], wherein the solid content concentration of the B material is 20 to 70% by mass.
[8] The two-material ready-mixed concrete shipping type hard concrete material according to any one of [1] to [7], wherein the viscosity of the B material at 20 ° C. is 1,400 mPa · s or less.
[9] The mass ratio (Al 2 O 3 / SO 3 ) of the aluminum in terms of Al 2 O 3 and the sulfur in terms of SO 3 is 0.05 to 1.0 [1] to [8]. The two-material type ready-mixed concrete shipping type hardened concrete material described in any of the above.
[10] A material containing a hardened cement and a sleeping pill and a material B composed of a curing accelerator containing aluminum, sulfur, sodium, and fluorine are contained, and the content of natroalnite in the material B is 0. Ready-mixed concrete shipping type hardened concrete composition in an amount of 3 to 5% by mass.
本発明によれば、低温環境下でも十分な可使時間を確保しつつ、初期の強度発現性に優れる実用性の高い生コン出荷型急硬コンクリート組成物を提供することができる。また、当該生コン出荷型急硬コンクリート組成物を製造するために好適な２材型の生コン出荷型急硬コンクリート材料を提供することができる。
According to the present invention, it is possible to provide a highly practical ready-mixed concrete shipping type hardened concrete composition having excellent initial strength development while ensuring a sufficient pot life even in a low temperature environment. Further, it is possible to provide a two-material type ready-mixed concrete shipping type hard concrete material suitable for producing the ready-mixed concrete shipping type hard concrete composition.
以下、本発明の実施形態を詳細に説明するが、本発明は当該実施形態に限定されるものではない。本明細書における「部」や「％」は特に規定しない限り質量基準とする。また、本明細書における組成物とは、セメント組成物、モルタル組成物、コンクリート組成物を総称するものである。
Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited to the embodiments. Unless otherwise specified, "parts" and "%" in the present specification are based on mass. Further, the composition in the present specification is a general term for a cement composition, a mortar composition, and a concrete composition.
［１］２材型の生コン出荷型急硬コンクリート材料
本実施形態の２材型の生コン出荷型急硬コンクリート材料は、急硬セメント及び眠剤を含むＡ材と、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とを含む、少なくとも２材で構成されている。 [1] Two-material ready-mixed concrete shipping type hard concrete material The two-material ready-mixed concrete shipping type hard concrete material of the present embodiment includes material A containing hard cement and a sleeping agent, aluminum, sulfur, sodium, and It is composed of at least two materials including a B material made of a curing accelerator containing fluorine.
本実施形態の２材型の生コン出荷型急硬コンクリート材料は、急硬セメント及び眠剤を含むＡ材と、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とを含む、少なくとも２材で構成されている。 [1] Two-material ready-mixed concrete shipping type hard concrete material The two-material ready-mixed concrete shipping type hard concrete material of the present embodiment includes material A containing hard cement and a sleeping agent, aluminum, sulfur, sodium, and It is composed of at least two materials including a B material made of a curing accelerator containing fluorine.
本実施形態でいう「生コン出荷型急硬コンクリート」とは、生コン工場や生コンプラント等で生コン（レディミクストコンクリート）を混練した後、アジテータ車等によって搬送されて、土木工事現場や建設現場等の施工現場に出荷され、打ち込み作業後に比較的早く硬化するコンクリートをいう。生コン出荷型急硬コンクリートの場合、搬送時間の関係から、出荷から作業完了まで、最低でも可使時間は１２０分以上必要であり、搬送距離が長い場合には１８０分以上の可使時間を確保することが望まれる。本実施形態は、このような用途に特化して用いられるものである。
なお、上記の「アジテータ車」とは、生コンを撹拌しながら輸送することができる、荷台部分にミキシング・ドラム（練り混ぜ用容器）を備えた貨物自動車であり、その機能に大きな差はないが、最大積載量２～２６ｔ級のものがあり、用途に応じて使い分けられている。 The “ready-mixed concrete shipping type hard concrete” in the present embodiment means that after kneading ready-mixed concrete (ready-mixed concrete) at a ready-mixed concrete factory or a ready-mixed concrete plant, it is transported by an agitator truck or the like to a civil engineering work site, a construction site, or the like. Concrete that is shipped to the construction site and hardens relatively quickly after driving. In the case of ready-mixed concrete shipping type hard concrete, at least 120 minutes or more is required from shipment to completion of work due to the transportation time, and if the transportation distance is long, 180 minutes or more is secured. It is desirable to do. This embodiment is specifically used for such applications.
The above-mentioned "agitator truck" is a freight vehicle equipped with a mixing drum (mixing container) on the loading platform, which can transport ready-mixed concrete while stirring, and there is no big difference in its functions. There are those with a maximum load capacity of 2 to 26 tons, which are used according to the purpose.
なお、上記の「アジテータ車」とは、生コンを撹拌しながら輸送することができる、荷台部分にミキシング・ドラム（練り混ぜ用容器）を備えた貨物自動車であり、その機能に大きな差はないが、最大積載量２～２６ｔ級のものがあり、用途に応じて使い分けられている。 The “ready-mixed concrete shipping type hard concrete” in the present embodiment means that after kneading ready-mixed concrete (ready-mixed concrete) at a ready-mixed concrete factory or a ready-mixed concrete plant, it is transported by an agitator truck or the like to a civil engineering work site, a construction site, or the like. Concrete that is shipped to the construction site and hardens relatively quickly after driving. In the case of ready-mixed concrete shipping type hard concrete, at least 120 minutes or more is required from shipment to completion of work due to the transportation time, and if the transportation distance is long, 180 minutes or more is secured. It is desirable to do. This embodiment is specifically used for such applications.
The above-mentioned "agitator truck" is a freight vehicle equipped with a mixing drum (mixing container) on the loading platform, which can transport ready-mixed concrete while stirring, and there is no big difference in its functions. There are those with a maximum load capacity of 2 to 26 tons, which are used according to the purpose.
本実施形態では、Ａ材中の眠剤により、生コン出荷型急硬コンクリートが眠らされたような状態、すなわち、水和硬化がほぼ停止した状態となる。これにより可使時間の確保が可能となる。また、Ｂ材中のアルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤の添加により、眠剤を多量に添加し眠らされた急硬コンクリートの水和硬化が施工現場で再び呼び覚まされる。そして、急硬材などのその他の成分により優れた初期強度発現性が得られる。
Ｂ材を添加することで凝結・硬化が進行するようになるが、Ｂ材を添加した後も、作業時間を確保する必要があり、少なくとも１５分以上の可使時間の確保が必要である。しかし、Ｂ材中のナトロアルナイトの含有量が一定量を超えると、硬化促進剤が発揮し得る急硬性が阻害され、これによって良好な施工性を発揮しにくくなる。これに対して本実施形態では、Ｂ材中のナトロアルナイトの含有量を検討し、その範囲を０．３～５％の範囲とすることで、低温環境下でも十分な可使時間を確保し、優れた初期強度発現性を実現した。
また、Ｂ材は取り扱い性に優れており、液状及び固形状（好ましくは粉末）のいずれの形態でも使用できるため、施工場所や状況に応じてその形態を選択できる等、実用性が高い。
以下、Ｂ材、Ａ材について詳細に説明する。 In the present embodiment, the hypnotic in the material A puts the ready-mixed concrete shipping type hardened concrete to sleep, that is, the hydration hardening is almost stopped. This makes it possible to secure pot life. Further, by adding a hardening accelerator containing aluminum, sulfur, sodium, and fluorine in the B material, the hydration hardening of the hardened concrete to which a large amount of sleeping pill is added and put to sleep is awakened again at the construction site. Then, excellent initial strength development can be obtained by other components such as a hardened material.
Condensation and hardening will proceed by adding the B material, but it is necessary to secure a working time even after the addition of the B material, and it is necessary to secure a pot life of at least 15 minutes or more. However, when the content of natroalnite in the B material exceeds a certain amount, the rapid hardness that the curing accelerator can exert is hindered, which makes it difficult to exhibit good workability. On the other hand, in the present embodiment, the content of natroalnite in the B material is examined and the range is set to the range of 0.3 to 5% to secure a sufficient pot life even in a low temperature environment. However, excellent initial strength development was achieved.
Further, since the B material is excellent in handleability and can be used in either a liquid form or a solid form (preferably powder), the form can be selected according to the construction site and the situation, and the practicality is high.
Hereinafter, the B material and the A material will be described in detail.
Ｂ材を添加することで凝結・硬化が進行するようになるが、Ｂ材を添加した後も、作業時間を確保する必要があり、少なくとも１５分以上の可使時間の確保が必要である。しかし、Ｂ材中のナトロアルナイトの含有量が一定量を超えると、硬化促進剤が発揮し得る急硬性が阻害され、これによって良好な施工性を発揮しにくくなる。これに対して本実施形態では、Ｂ材中のナトロアルナイトの含有量を検討し、その範囲を０．３～５％の範囲とすることで、低温環境下でも十分な可使時間を確保し、優れた初期強度発現性を実現した。
また、Ｂ材は取り扱い性に優れており、液状及び固形状（好ましくは粉末）のいずれの形態でも使用できるため、施工場所や状況に応じてその形態を選択できる等、実用性が高い。
以下、Ｂ材、Ａ材について詳細に説明する。 In the present embodiment, the hypnotic in the material A puts the ready-mixed concrete shipping type hardened concrete to sleep, that is, the hydration hardening is almost stopped. This makes it possible to secure pot life. Further, by adding a hardening accelerator containing aluminum, sulfur, sodium, and fluorine in the B material, the hydration hardening of the hardened concrete to which a large amount of sleeping pill is added and put to sleep is awakened again at the construction site. Then, excellent initial strength development can be obtained by other components such as a hardened material.
Condensation and hardening will proceed by adding the B material, but it is necessary to secure a working time even after the addition of the B material, and it is necessary to secure a pot life of at least 15 minutes or more. However, when the content of natroalnite in the B material exceeds a certain amount, the rapid hardness that the curing accelerator can exert is hindered, which makes it difficult to exhibit good workability. On the other hand, in the present embodiment, the content of natroalnite in the B material is examined and the range is set to the range of 0.3 to 5% to secure a sufficient pot life even in a low temperature environment. However, excellent initial strength development was achieved.
Further, since the B material is excellent in handleability and can be used in either a liquid form or a solid form (preferably powder), the form can be selected according to the construction site and the situation, and the practicality is high.
Hereinafter, the B material and the A material will be described in detail.
［Ｂ材］
本発明の実施形態（本実施形態）に係るＢ材は、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤である。硬化促進剤としてのＢ材がこれらを含むことで低温環境下でも急硬性及び強度発現性を良好にすることができる。 [Material B]
The B material according to the embodiment of the present invention (the present embodiment) is a curing accelerator containing aluminum, sulfur, sodium, and fluorine. When the B material as a curing accelerator contains these, it is possible to improve the rapid hardness and strength development even in a low temperature environment.
本発明の実施形態（本実施形態）に係るＢ材は、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤である。硬化促進剤としてのＢ材がこれらを含むことで低温環境下でも急硬性及び強度発現性を良好にすることができる。 [Material B]
The B material according to the embodiment of the present invention (the present embodiment) is a curing accelerator containing aluminum, sulfur, sodium, and fluorine. When the B material as a curing accelerator contains these, it is possible to improve the rapid hardness and strength development even in a low temperature environment.
また、本実施形態に係るＢ材は、当該Ｂ材中のナトロアルナイトの含有量が５％以下である。ナトロアルナイトの含有量が５％を超えると、硬化促進剤が発揮し得る急硬性が阻害され、これによって良好な施工性を発揮しにくくなる。ナトロアルナイトの含有量は４％以下であることが好ましく、３％以下であることがより好ましい。なお、ナトロアルナイトは無いことが好ましいが、熱加水分解より生成することから実際的には０．３％程度存在してしまうことがある。
Further, the B material according to the present embodiment has a content of natroalnite in the B material of 5% or less. When the content of natroalnite exceeds 5%, the rapid hardness that the curing accelerator can exert is hindered, which makes it difficult to exhibit good workability. The content of natroalnite is preferably 4% or less, more preferably 3% or less. It is preferable that there is no natroalnite, but since it is produced by thermal hydrolysis, it may actually be present in an amount of about 0.3%.
ナトロアルナイトの含有量が５％以下となるのは、少なくとも、Ｂ材の作製直後から、０～４０℃で４８時間保存した後であることが好ましい。この時点でナトロアルナイトの含有量が５％以下であれば、その後の０～４０℃の保管でナトロアルナイトによる急硬阻害が抑制される。なお、「０～４０℃」は、Ｂ材の実使用の際の温度範囲を想定したものである。ナトロアルナイトの含有量は実施例の記載の方法で測定することができる。
It is preferable that the content of natroalnite is 5% or less at least immediately after the preparation of the B material and after storage at 0 to 40 ° C. for 48 hours. If the content of natroalnite is 5% or less at this point, the rapid hardening inhibition by natroalnite is suppressed by the subsequent storage at 0 to 40 ° C. It should be noted that "0 to 40 ° C." assumes a temperature range when the B material is actually used. The content of natroalnite can be measured by the method described in the examples.
ここで、ナトロアルナイト（Ｎａｔｒｏａｌｕｎａｉｔｅ）とは、ソーダ明礬石とも言われ、（ＮａＡｌ３（ＳＯ４）２（ＯＨ）６、（Ｎａ，Ｋ）Ａｌ３（ＳＯ４）２（ＯＨ）６、又は、［Ｎａ＋］［Ａｌ３＋］［Ａｌ３＋
２］［（ＯＨ）６｜（ＳＯ４）２］１０－）で表される。本発明者らによれば、ナトロアルナイトは、主に原料である氷晶石に由来するもので、特に、氷晶石中のチオライト（Ｎａ５Ａｌ３Ｆ１４）やエルパソライト（Ｋ２ＮａＡｌＦ６）に由来することが見出している。
したがって、Ｂ材中のナトロアルナイトの含有量を５％以下となるには、氷晶石中のチオライト及びエルパソライトを低減させる等の処理を施せばよい。また、後述するようにＢ材を作製する際の温度条件を調整してもよい。 Here, Natroalunite is also referred to as soda alunite, and is (NaAl 3 (SO 4 ) 2 (OH) 6 , (Na, K) Al 3 (SO 4 ) 2 (OH) 6 or , [Na + ] [Al 3+ ] [Al 3 + 2 ] [(OH) 6 | (SO 4 ) 2 ] 10- ). According to the present inventors, natroalnite is mainly derived from cryolite, which is a raw material, and in particular, thiolite (Na 5 Al 3 F 14 ) and elpasolite (K 2 NaAlF) in cryolite. It has been found that it is derived from 6 ).
Therefore, in order to reduce the content of natroalnite in the B material to 5% or less, treatment such as reducing thiolite and elpasolite in cryolite may be performed. Further, as will be described later, the temperature conditions for producing the B material may be adjusted.
したがって、Ｂ材中のナトロアルナイトの含有量を５％以下となるには、氷晶石中のチオライト及びエルパソライトを低減させる等の処理を施せばよい。また、後述するようにＢ材を作製する際の温度条件を調整してもよい。 Here, Natroalunite is also referred to as soda alunite, and is (NaAl 3 (SO 4 ) 2 (OH) 6 , (Na, K) Al 3 (SO 4 ) 2 (OH) 6 or , [Na + ] [Al 3+ ] [Al 3 + 2 ] [(OH) 6 | (SO 4 ) 2 ] 10- ). According to the present inventors, natroalnite is mainly derived from cryolite, which is a raw material, and in particular, thiolite (Na 5 Al 3 F 14 ) and elpasolite (K 2 NaAlF) in cryolite. It has been found that it is derived from 6 ).
Therefore, in order to reduce the content of natroalnite in the B material to 5% or less, treatment such as reducing thiolite and elpasolite in cryolite may be performed. Further, as will be described later, the temperature conditions for producing the B material may be adjusted.
本実施形態に係るＢ材は、酸性であることが好ましく、ｐＨが１～４であることがより好ましい。Ｂ材が酸性であることで、塩基性の硬化促進剤に比べて取り扱い性が向上する。Ｂ材のｐＨを上記範囲内とするためには、水及び硫酸等を添加して調整するとよい。
The B material according to the present embodiment is preferably acidic, and more preferably has a pH of 1 to 4. Since the material B is acidic, the handleability is improved as compared with the basic curing accelerator. In order to keep the pH of the B material within the above range, it is advisable to add water, sulfuric acid or the like to adjust the pH.
Ｂ材中のアルミニウム、硫黄、ナトリウム、及びフッ素の含有量は特に限定されるものではなく、急硬性の観点から、アルミニウムはＡｌ２Ｏ３換算で０．１～２０部、硫黄はＳＯ３換算で０．１～３０部、ナトリウムはＮａ２Ｏ換算で０．０１～５部、及びフッ素は０．０１～１０部であることが好ましい。アルミニウムはＡｌ２Ｏ３換算で０．１～１０部であることがより好ましい。硫黄はＳＯ３換算で０．１～１０部であることがより好ましい。ナトリウムはＮａ２Ｏ換算で０．０１～２部であることがより好ましい。フッ素は０．０１～２部であることがより好ましい。
The contents of aluminum, sulfur, sodium, and fluorine in the B material are not particularly limited, and from the viewpoint of rapid hardness, aluminum is converted to Al 2 O 3 in an amount of 0.1 to 20 parts, and sulfur is converted into SO 3 . It is preferable that the amount is 0.1 to 30 parts, sodium is 0.01 to 5 parts in terms of Na 2O , and fluorine is 0.01 to 10 parts. It is more preferable that the amount of aluminum is 0.1 to 10 parts in terms of Al 2 O 3 . Sulfur is more preferably 0.1 to 10 parts in terms of SO 3 . It is more preferable that sodium is 0.01 to 2 parts in terms of Na 2 O. Fluorine is more preferably 0.01 to 2 parts.
さらに、Ｂ材の貯蔵安定性やペースト、モルタル、コンクリートへの添加時の混合性の観点から、Ａｌ２Ｏ３換算でのアルミニウムとＳＯ３換算での硫黄との質量比（Ａｌ２Ｏ３／ＳＯ３）は０．０５～１．０であることが好ましく、０．１～０．８であることがより好ましい。
Furthermore, from the viewpoint of storage stability of B material and mixing property when added to paste, mortar, and concrete, the mass ratio of aluminum in terms of Al 2 O 3 and sulfur in terms of SO 3 (Al 2 O 3 / SO 3 ) is preferably 0.05 to 1.0, more preferably 0.1 to 0.8.
本実施形態に係るＢ材の固形分濃度は、硬化促進剤の貯蔵安定性やペースト、モルタル、コンクリートへの添加時の混合性の観点から、２０～７０％であることが好ましく、２３～６０％であることがより好ましい。
The solid content concentration of the B material according to the present embodiment is preferably 20 to 70%, preferably 23 to 60%, from the viewpoint of storage stability of the curing accelerator and mixing property when added to paste, mortar, and concrete. % Is more preferable.
また、本実施形態に係るＢ材の２０℃における粘度は１，４００ｍＰａ・ｓ以下であることが好ましく、１～１，０００ｍＰａ・ｓがより好ましい。粘度は１，４００ｍＰａ・ｓ以下であることで混合性が高まり、安定した物性が得られる。粘度は、実施例に記載の方法により測定することができる。
Further, the viscosity of the B material according to the present embodiment at 20 ° C. is preferably 1,400 mPa · s or less, and more preferably 1 to 1,000 mPa · s. When the viscosity is 1,400 mPa · s or less, the mixing property is enhanced and stable physical properties can be obtained. The viscosity can be measured by the method described in the examples.
本実施形態では、後述の眠剤とＢ材との量論比を検討し、その範囲を０．５～５の範囲とすることで、十分な可使時間を確保し、優れた初期強度発現性を実現した。当該量論比は下記式（１）で表される。式（１）は、眠剤とＢ材が含まれるコンクリートにおいて、眠剤に対する硬化促進剤であるＢ材の比率を意味するもので、この比が０．５～５の範囲にあるということは、この比が低すぎると眠剤が過多で急硬性が得られず、この比が高すぎるとＢ材が過多で瞬結してしまうことになる。
式（１）：量論比＝［Ｂ材中アルミニウムの物質量（ｍｏｌ）］×アルミニウムの数×アルミニウムイオンの価数／（眠剤に配合されるオキシカルボン酸の物質量（ｍｏｌ）×眠剤に配合されるオキシカルボン酸の価数） In this embodiment, the stoichiometric ratio of the hypnotic and the B material, which will be described later, is examined, and the range is set to the range of 0.5 to 5, so that a sufficient pot life is secured and excellent initial strength is exhibited. Realized the sex. The stoichiometric ratio is expressed by the following equation (1). The formula (1) means the ratio of the B material, which is a curing accelerator, to the hypnotic in the concrete containing the hypnotic and the B material, and the ratio is in the range of 0.5 to 5. If this ratio is too low, the amount of sleeping pills is too large to obtain rapid hardness, and if this ratio is too high, the amount of B material is excessive and the concrete is instantly bound.
Formula (1): Quantitative ratio = [Amount of substance of aluminum in B material (mol)] x number of aluminum x valence of aluminum ions / (amount of substance of oxycarboxylic acid contained in sleeping pills (mol) x sleep The valence of the oxycarboxylic acid contained in the agent)
式（１）：量論比＝［Ｂ材中アルミニウムの物質量（ｍｏｌ）］×アルミニウムの数×アルミニウムイオンの価数／（眠剤に配合されるオキシカルボン酸の物質量（ｍｏｌ）×眠剤に配合されるオキシカルボン酸の価数） In this embodiment, the stoichiometric ratio of the hypnotic and the B material, which will be described later, is examined, and the range is set to the range of 0.5 to 5, so that a sufficient pot life is secured and excellent initial strength is exhibited. Realized the sex. The stoichiometric ratio is expressed by the following equation (1). The formula (1) means the ratio of the B material, which is a curing accelerator, to the hypnotic in the concrete containing the hypnotic and the B material, and the ratio is in the range of 0.5 to 5. If this ratio is too low, the amount of sleeping pills is too large to obtain rapid hardness, and if this ratio is too high, the amount of B material is excessive and the concrete is instantly bound.
Formula (1): Quantitative ratio = [Amount of substance of aluminum in B material (mol)] x number of aluminum x valence of aluminum ions / (amount of substance of oxycarboxylic acid contained in sleeping pills (mol) x sleep The valence of the oxycarboxylic acid contained in the agent)
以下では、硫酸アルミニウムを含有するＢ材と、Ａ材の眠剤として炭酸カリウムとクエン酸（炭酸カリウム：クエン酸＝７５：２５（質量比））を用いた場合を例に量論比の説明をする。
まず、硫酸アルミニウム、クエン酸のモル質量は下記のとおりである。
・硫酸アルミニウム（Ａｌ２（ＳＯ４）３） 分子量（Ｍ．Ｗ．）＝３４２．２
・クエン酸（Ｃ６Ｈ８Ｏ７） 分子量（Ｍ．Ｗ．）＝１９２．１
コンクリート中の結合材５００ｋｇに対して、硫酸アルミニウムを１％、眠剤を１．５％含有させるとすると、そのコンクリートあたり、それぞれの成分は下記のとおりとなる。Ｂ材は眠剤の遅延剤であるクエン酸に作用する。
・硫酸アルミニウム：結合材５００，０００ｇ×０．０１（＝１％）÷３４２．２＝１４．６ｍｏｌ
・クエン酸：結合材５００，０００ｇ×０．０１５（＝１．５％）×０．２５（＝２５％）÷１９２．１＝９．７ｍｏｌ
アルミニウムイオンは３価の酸として働くこと、及び、硫酸アルミニウムにはＡｌが２つあること、クエン酸イオンは３価の塩基（遅延剤イオンの価数＝３）であることから、既述の式（１）は下記のとおり計算される。
式（１）：量論比＝（１４．６×２×３）／（９．７×３）＝３．０ In the following, the quantitative ratio will be explained by taking as an example the case where B material containing aluminum sulfate and potassium carbonate and citric acid (potassium carbonate: citric acid = 75: 25 (mass ratio)) are used as sleeping agents for material A. do.
First, the molar masses of aluminum sulfate and citric acid are as follows.
-Aluminum sulfate (Al 2 (SO 4 ) 3 ) Molecular weight (MW) = 342.2
-Citric acid (C 6 H 8 O 7 ) Molecular weight (MW) = 192.1
Assuming that 1% of aluminum sulfate and 1.5% of hypnotic are contained in 500 kg of the binder in concrete, the respective components per concrete are as follows. Material B acts on citric acid, which is a hypnotic retarder.
-Aluminum sulfate: Bonding material 500,000 g x 0.01 (= 1%) ÷ 342.2 = 14.6 mol
-Citric acid: Binder 500,000 g x 0.015 (= 1.5%) x 0.25 (= 25%) ÷ 192.1 = 9.7 mol
As described above, aluminum ion acts as a trivalent acid, aluminum sulfate has two Als, and citrate ion is a trivalent base (the valence of the retarder ion = 3). Equation (1) is calculated as follows.
Equation (1): Stoichiometric ratio = (14.6 × 2 × 3) / (9.7 × 3) = 3.0
まず、硫酸アルミニウム、クエン酸のモル質量は下記のとおりである。
・硫酸アルミニウム（Ａｌ２（ＳＯ４）３） 分子量（Ｍ．Ｗ．）＝３４２．２
・クエン酸（Ｃ６Ｈ８Ｏ７） 分子量（Ｍ．Ｗ．）＝１９２．１
コンクリート中の結合材５００ｋｇに対して、硫酸アルミニウムを１％、眠剤を１．５％含有させるとすると、そのコンクリートあたり、それぞれの成分は下記のとおりとなる。Ｂ材は眠剤の遅延剤であるクエン酸に作用する。
・硫酸アルミニウム：結合材５００，０００ｇ×０．０１（＝１％）÷３４２．２＝１４．６ｍｏｌ
・クエン酸：結合材５００，０００ｇ×０．０１５（＝１．５％）×０．２５（＝２５％）÷１９２．１＝９．７ｍｏｌ
アルミニウムイオンは３価の酸として働くこと、及び、硫酸アルミニウムにはＡｌが２つあること、クエン酸イオンは３価の塩基（遅延剤イオンの価数＝３）であることから、既述の式（１）は下記のとおり計算される。
式（１）：量論比＝（１４．６×２×３）／（９．７×３）＝３．０ In the following, the quantitative ratio will be explained by taking as an example the case where B material containing aluminum sulfate and potassium carbonate and citric acid (potassium carbonate: citric acid = 75: 25 (mass ratio)) are used as sleeping agents for material A. do.
First, the molar masses of aluminum sulfate and citric acid are as follows.
-Aluminum sulfate (Al 2 (SO 4 ) 3 ) Molecular weight (MW) = 342.2
-Citric acid (C 6 H 8 O 7 ) Molecular weight (MW) = 192.1
Assuming that 1% of aluminum sulfate and 1.5% of hypnotic are contained in 500 kg of the binder in concrete, the respective components per concrete are as follows. Material B acts on citric acid, which is a hypnotic retarder.
-Aluminum sulfate: Bonding material 500,000 g x 0.01 (= 1%) ÷ 342.2 = 14.6 mol
-Citric acid: Binder 500,000 g x 0.015 (= 1.5%) x 0.25 (= 25%) ÷ 192.1 = 9.7 mol
As described above, aluminum ion acts as a trivalent acid, aluminum sulfate has two Als, and citrate ion is a trivalent base (the valence of the retarder ion = 3). Equation (1) is calculated as follows.
Equation (1): Stoichiometric ratio = (14.6 × 2 × 3) / (9.7 × 3) = 3.0
本実施形態に係るＢ材は、例えば、硫酸アルミニウム、各種ミョウバン、水酸化アルミニウム、水酸化ナトリウム、硫酸、天然又は合成の氷晶石、フッ化ナトリウム、及びフッ化アルミニウム等の原料を液体中で混合し、８０～９５℃で３０～１２０分加熱して作製することができる。良好な生産性の観点から、原料は硫酸、水酸化アルミニウム、硫酸アルミニウム又は各種ミョウバンと、天然若しくは合成の氷晶石とを用いることが好ましい。また、液体としては水等を用いることが好ましい。
The B material according to the present embodiment is prepared by using raw materials such as aluminum sulfate, various alums, aluminum hydroxide, sodium hydroxide, sulfuric acid, natural or synthetic cryolite, sodium fluoride, and aluminum fluoride in a liquid. It can be prepared by mixing and heating at 80 to 95 ° C. for 30 to 120 minutes. From the viewpoint of good productivity, it is preferable to use sulfuric acid, aluminum hydroxide, aluminum sulfate or various alums and natural or synthetic cryolite as raw materials. Further, it is preferable to use water or the like as the liquid.
ここで、本実施形態に係るＢ材を作製する際の原材料として、氷晶石を用いると、不溶性析出物が発生しやすい。特に、氷晶石に含有されるチオライト及びエルパソライトが不溶性析出物の発生に寄与していると推察される。また、硬化促進剤を作製する際に特定の操作を行うと不溶性析出物の発生が抑えられることがわかった。これらのいずれかを考慮し、Ｂ材中のナトロアルナイトの含有量を５％以下とするために、例えば、下記（１）又は（２）のような操作をすることが好ましい。
Here, if cryolite is used as a raw material for producing the B material according to the present embodiment, insoluble precipitates are likely to be generated. In particular, it is presumed that thiolite and elpasolite contained in cryolite contribute to the generation of insoluble precipitates. It was also found that the generation of insoluble precipitates was suppressed by performing a specific operation when producing the curing accelerator. In consideration of any of these, it is preferable to perform the following operations (1) or (2), for example, in order to reduce the content of natroalnite in the B material to 5% or less.
（１）当該原材料として氷晶石を用いる際に、この氷晶石に含有されるチオライト及びエルパソライトの量が氷晶石中５％以下のものを使用する。
（２）既述の８０～９５℃での加熱後に６０分以内に常温（例えば２５℃）になるように急冷する。 (1) When cryolite is used as the raw material, the amount of thiolite and elpasolite contained in the cryolite is 5% or less in the cryolite.
(2) After heating at 80 to 95 ° C. as described above, the mixture is rapidly cooled to room temperature (for example, 25 ° C.) within 60 minutes.
（２）既述の８０～９５℃での加熱後に６０分以内に常温（例えば２５℃）になるように急冷する。 (1) When cryolite is used as the raw material, the amount of thiolite and elpasolite contained in the cryolite is 5% or less in the cryolite.
(2) After heating at 80 to 95 ° C. as described above, the mixture is rapidly cooled to room temperature (for example, 25 ° C.) within 60 minutes.
以上のようにして作製されるＢ材は、後述するような生コン出荷型急硬コンクリート用として好適である。
The B material produced as described above is suitable for ready-mixed concrete shipping type hardened concrete as described later.
［Ａ材］
Ａ材は、急硬セメント及び眠剤を含む。
（眠剤）
本実施形態で使用する眠剤は、生コンから出荷した急硬コンクリートを眠らせる（水和硬化をほぼ停止させる）働きを持つものであり、生コンプラントでの急硬トラブルや、アジテータ車で搬送する際の急硬トラブルを回避するものである。眠剤としては、例えば、オキシカルボン酸、又は、その塩、或いはこれらとアルカリ金属炭酸塩の併用、糖類、ホウ酸等が挙げられる。オキシカルボン酸とアルカリ金属炭酸塩を併用することが、急硬コンクリートを眠らせる効果が大きい面や、Ｂ材を添加した後の強度発現性が良好な面から好ましい。ただし、アルカリ金属炭酸塩はリチウム以外のアルカリ金属炭酸塩を選定することが好ましい。ベースコンクリートの十分な可使時間を確保し、かつ、Ｂ材を添加した後も一定の可使時間を確保し、さらに、強度発現性を良好にする必要があり、この観点から炭酸リチウムの適用は好ましくない。また、オキシカルボン酸と併用しないアルカリ金属炭酸塩のみの場合は眠剤とはならない。
なお、本明細書において、ベースコンクリートとは、少なくとも、急硬セメント、眠剤、骨材、及び混練水を混練してなるコンクリートをいう。 [Material A]
Material A contains hardened cement and hypnotics.
(Hypnotic)
The hypnotic used in this embodiment has a function of putting the hard concrete shipped from the ready-mixed concrete to sleep (almost stopping the hydration hardening), and is used for hard-hardening troubles in the ready-mixed concrete plant or when transporting by an agitator truck. This is to avoid the sudden hard trouble of. Examples of the sleeping agent include oxycarboxylic acid or a salt thereof, a combination thereof with an alkali metal carbonate, saccharides, boric acid and the like. The combined use of oxycarboxylic acid and alkali metal carbonate is preferable from the viewpoint of the large effect of putting the hardened concrete to sleep and the good strength development after the addition of the B material. However, it is preferable to select an alkali metal carbonate other than lithium as the alkali metal carbonate. It is necessary to secure a sufficient pot life of the base concrete, secure a certain pot life even after adding the B material, and further improve the strength development. From this point of view, lithium carbonate is applied. Is not desirable. In addition, only alkali metal carbonates that are not used in combination with oxycarboxylic acid do not serve as hypnotics.
In addition, in this specification, the base concrete means concrete which at least made by kneading hard cement, hypnotic, aggregate, and kneading water.
Ａ材は、急硬セメント及び眠剤を含む。
（眠剤）
本実施形態で使用する眠剤は、生コンから出荷した急硬コンクリートを眠らせる（水和硬化をほぼ停止させる）働きを持つものであり、生コンプラントでの急硬トラブルや、アジテータ車で搬送する際の急硬トラブルを回避するものである。眠剤としては、例えば、オキシカルボン酸、又は、その塩、或いはこれらとアルカリ金属炭酸塩の併用、糖類、ホウ酸等が挙げられる。オキシカルボン酸とアルカリ金属炭酸塩を併用することが、急硬コンクリートを眠らせる効果が大きい面や、Ｂ材を添加した後の強度発現性が良好な面から好ましい。ただし、アルカリ金属炭酸塩はリチウム以外のアルカリ金属炭酸塩を選定することが好ましい。ベースコンクリートの十分な可使時間を確保し、かつ、Ｂ材を添加した後も一定の可使時間を確保し、さらに、強度発現性を良好にする必要があり、この観点から炭酸リチウムの適用は好ましくない。また、オキシカルボン酸と併用しないアルカリ金属炭酸塩のみの場合は眠剤とはならない。
なお、本明細書において、ベースコンクリートとは、少なくとも、急硬セメント、眠剤、骨材、及び混練水を混練してなるコンクリートをいう。 [Material A]
Material A contains hardened cement and hypnotics.
(Hypnotic)
The hypnotic used in this embodiment has a function of putting the hard concrete shipped from the ready-mixed concrete to sleep (almost stopping the hydration hardening), and is used for hard-hardening troubles in the ready-mixed concrete plant or when transporting by an agitator truck. This is to avoid the sudden hard trouble of. Examples of the sleeping agent include oxycarboxylic acid or a salt thereof, a combination thereof with an alkali metal carbonate, saccharides, boric acid and the like. The combined use of oxycarboxylic acid and alkali metal carbonate is preferable from the viewpoint of the large effect of putting the hardened concrete to sleep and the good strength development after the addition of the B material. However, it is preferable to select an alkali metal carbonate other than lithium as the alkali metal carbonate. It is necessary to secure a sufficient pot life of the base concrete, secure a certain pot life even after adding the B material, and further improve the strength development. From this point of view, lithium carbonate is applied. Is not desirable. In addition, only alkali metal carbonates that are not used in combination with oxycarboxylic acid do not serve as hypnotics.
In addition, in this specification, the base concrete means concrete which at least made by kneading hard cement, hypnotic, aggregate, and kneading water.
眠剤としては、オキシカルボン酸、リチウム以外のアルカリ金属炭酸塩及びオキシカルボン酸の混合物を含むことが好ましく、リチウム以外のアルカリ金属炭酸塩及びオキシカルボン酸の混合物を含むことがより好ましい。リチウム以外のアルカリ金属炭酸塩とオキシカルボン酸との混合比（質量比）は、アルカリ金属炭酸塩／オキシカルボン酸で、１０／９０～９０／１０であることが好ましく、２０／８０～８０／２０であることがより好ましい。
The sleeping agent preferably contains a mixture of oxycarboxylic acid, an alkali metal carbonate other than lithium and an oxycarboxylic acid, and more preferably contains a mixture of an alkali metal carbonate other than lithium and an oxycarboxylic acid. The mixing ratio (mass ratio) of the alkali metal carbonate other than lithium and the oxycarboxylic acid is preferably 10/90 to 90/10 for the alkali metal carbonate / oxycarboxylic acid, and is preferably 20/80 to 80/10. 20 is more preferable.
オキシカルボン酸としては、オキシカルボン酸又はその塩を含み、オキシカルボン酸としては、クエン酸、グルコン酸、酒石酸、リンゴ酸等が挙げられ、その塩としては、ナトリウム塩、カリウム塩、カルシウム塩、マグネシウム塩等が挙げられる。これらの１種又は２種以上を併用してもよい。
Examples of the oxycarboxylic acid include oxycarboxylic acid or a salt thereof, examples of the oxycarboxylic acid include citric acid, gluconic acid, tartrate acid, and malic acid, and examples thereof include sodium salt, potassium salt, and calcium salt. Examples include magnesium salts. One or more of these may be used in combination.
眠剤の含有量は、急硬セメント１００部に対して、０．３～５部が好ましく、０．３～４．５部がより好ましい。０．３～５部であることで、現場までの搬送時間に加え、十分な作業時間の確保がしやすくなる。また、Ｂ材を添加した際に水和硬化を再び呼び起こしやすくなる。
The content of the hypnotic is preferably 0.3 to 5 parts, more preferably 0.3 to 4.5 parts, with respect to 100 parts of the hardened cement. With 0.3 to 5 copies, it is easy to secure sufficient working time in addition to the transportation time to the site. In addition, when the B material is added, hydration hardening is likely to occur again.
（急硬セメント）
急硬セメントとは、材齢３時間で圧縮強度２４Ｎ／ｍｍ２以上を発現する急硬コンクリート向けのセメントであり、急硬成分より、カルシウムフロロアルミネート系、アウイン系、カルシウムアルミネート系、に大別される。中でもスランプロス低減の点からもカルシウムアルミネート系急硬セメントの使用が好適である。 (Hard cement)
Hard-hardened cement is a cement for hard-hardened concrete that develops a compressive strength of 24 N / mm 2 or more at a material age of 3 hours. It is roughly divided. Above all, the use of calcium aluminate-based hardened cement is preferable from the viewpoint of reducing slump loss.
急硬セメントとは、材齢３時間で圧縮強度２４Ｎ／ｍｍ２以上を発現する急硬コンクリート向けのセメントであり、急硬成分より、カルシウムフロロアルミネート系、アウイン系、カルシウムアルミネート系、に大別される。中でもスランプロス低減の点からもカルシウムアルミネート系急硬セメントの使用が好適である。 (Hard cement)
Hard-hardened cement is a cement for hard-hardened concrete that develops a compressive strength of 24 N / mm 2 or more at a material age of 3 hours. It is roughly divided. Above all, the use of calcium aluminate-based hardened cement is preferable from the viewpoint of reducing slump loss.
カルシウムアルミネート系の急硬セメントは、セメント、急硬材、そして凝結調整剤を配合するものであり、急硬材とは、カルシウムアルミネート系化合物とセッコウ類からなるものである。
Calcium aluminumate-based hardened cement is a mixture of cement, hardened material, and a setting agent, and the hardened material is composed of a calcium aluminate-based compound and succulents.
（セメント）
本実施形態でいう「セメント」とは、特に限定されるものではないが、例えば、日本工業規格（ＪＩＳ）で定められる普通、早強、中庸熱、低熱の各種ポルトランドセメント、高炉スラグ、フライアッシュ、シリカを混合した各種の混合セメント、石灰石粉末や高炉徐冷スラグ微粉末などを混合したフィラーセメント、並びに、都市ゴミ焼却灰や下水汚泥焼却灰を原料として製造された環境調和型セメント（エコセメント）などのあらゆるセメントが挙げられる。また、海外のＥＮ１９７－２０００で定められたセメントや中国ＧＢ規格で定められるあらゆるセメントを挙げることができ、これらのうちの一種又は二種以上が使用可能である。 (cement)
The “cement” in the present embodiment is not particularly limited, but is, for example, various types of normal, fast-strength, moderate-heat, and low-heat Portoland cement, blast furnace slag, and fly ash defined by the Japanese Industrial Standards (JIS). , Various mixed cements mixed with silica, filler cements mixed with limestone powder and blast furnace slow-cooled slag fine powder, and environment-friendly cement (eco-cement) manufactured from urban waste incineration ash and sewage sludge incineration ash. ) And all other cements. In addition, cement defined by EN197-2000 overseas and all cements defined by the Chinese GB standard can be mentioned, and one or more of these can be used.
本実施形態でいう「セメント」とは、特に限定されるものではないが、例えば、日本工業規格（ＪＩＳ）で定められる普通、早強、中庸熱、低熱の各種ポルトランドセメント、高炉スラグ、フライアッシュ、シリカを混合した各種の混合セメント、石灰石粉末や高炉徐冷スラグ微粉末などを混合したフィラーセメント、並びに、都市ゴミ焼却灰や下水汚泥焼却灰を原料として製造された環境調和型セメント（エコセメント）などのあらゆるセメントが挙げられる。また、海外のＥＮ１９７－２０００で定められたセメントや中国ＧＢ規格で定められるあらゆるセメントを挙げることができ、これらのうちの一種又は二種以上が使用可能である。 (cement)
The “cement” in the present embodiment is not particularly limited, but is, for example, various types of normal, fast-strength, moderate-heat, and low-heat Portoland cement, blast furnace slag, and fly ash defined by the Japanese Industrial Standards (JIS). , Various mixed cements mixed with silica, filler cements mixed with limestone powder and blast furnace slow-cooled slag fine powder, and environment-friendly cement (eco-cement) manufactured from urban waste incineration ash and sewage sludge incineration ash. ) And all other cements. In addition, cement defined by EN197-2000 overseas and all cements defined by the Chinese GB standard can be mentioned, and one or more of these can be used.
ポルトランドセメントの構成化合物は、エーライト（３ＣａＯ・ＳｉＯ２）、ビーライト（２ＣａＯ・ＳｉＯ２）、アルミネート（３ＣａＯ・Ａｌ２Ｏ３）、フェライト（４ＣａＯ・Ａｌ２Ｏ３・Ｆｅ２Ｏ３）と、さらに、二水セッコウが混合されている（この一部が半水セッコウに変化することもある）。本実施形態では、高炉スラグ、フライアッシュ、シリカ、石灰石微粉末などの混合材を含まないセメントを選定することが強度発現性の観点から望ましく、中でも、エーライト含有量が高く、粉末度の高い（粒度が細かい）セメントを選定することが好ましい。これに該当するセメントとしては、例えば、日本のセメントで例示すると、早強セメントや普通セメントを挙げることができる。また、中国のセメントで例示すると、ＰＩＩ・５２．５やＰＩＩ・４２．５を挙げることができる。
The constituent compounds of Portland cement are alite (3CaO · SiO 2 ), belite (2CaO · SiO 2 ), aluminate (3CaO · Al 2 O 3 ), and ferrite (4 CaO · Al 2 O 3 · Fe 2 O 3 ). And, in addition, two-water cement is mixed (a part of this may change to semi-water cement). In the present embodiment, it is desirable to select a cement that does not contain a mixture such as blast furnace slag, fly ash, silica, and limestone fine powder from the viewpoint of strength development, and above all, the alite content is high and the powderiness is high. It is preferable to select cement (fine grain size). Examples of cement corresponding to this include early-strength cement and ordinary cement, for example, Japanese cement. Further, as an example of Chinese cement, PII ・ 52.5 and PII ・ 42.5 can be mentioned.
（急硬材）
本実施形態の急硬材は、カルシウムアルミネート系化合物とセッコウ類とからなることが好ましい。ここで、カルシウムアルミネート系化合物とは、ＣａＯとＡｌ２Ｏ３を主体とする化合物を総称するものであり、特に限定されるものではない。その具体例としては、ＣａＯ・Ａｌ２Ｏ３、１２ＣａＯ・７Ａｌ２Ｏ３、１１ＣａＯ・７Ａｌ２Ｏ３・ＣａＦ２、３ＣａＯ・Ａｌ２Ｏ３、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４、更に、ＣａＯとＡｌ２Ｏ３を主体とする非晶質物質（例えば、ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系化合物）等が挙げられる。中でも、非晶質物質を選定することが強度発現性の観点から好ましい。 (Stiff material)
The hardened material of the present embodiment is preferably composed of a calcium aluminate-based compound and sucrose. Here, the calcium aluminate-based compound is a general term for compounds mainly composed of CaO and Al2O3 , and is not particularly limited. Specific examples thereof include CaO / Al 2O 3 , 12CaO / 7Al 2O 3 , 11CaO / 7Al 2O3 / CaF2 , 3CaO / Al2O3 , 3CaO / 3Al2O3 / CaSO 4 , and further, CaO. And an amorphous substance mainly composed of Al 2 O 3 (for example, CaO-Al 2 O 3 -SiO 2 system compound) and the like. Above all, it is preferable to select an amorphous substance from the viewpoint of strength development.
本実施形態の急硬材は、カルシウムアルミネート系化合物とセッコウ類とからなることが好ましい。ここで、カルシウムアルミネート系化合物とは、ＣａＯとＡｌ２Ｏ３を主体とする化合物を総称するものであり、特に限定されるものではない。その具体例としては、ＣａＯ・Ａｌ２Ｏ３、１２ＣａＯ・７Ａｌ２Ｏ３、１１ＣａＯ・７Ａｌ２Ｏ３・ＣａＦ２、３ＣａＯ・Ａｌ２Ｏ３、３ＣａＯ・３Ａｌ２Ｏ３・ＣａＳＯ４、更に、ＣａＯとＡｌ２Ｏ３を主体とする非晶質物質（例えば、ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系化合物）等が挙げられる。中でも、非晶質物質を選定することが強度発現性の観点から好ましい。 (Stiff material)
The hardened material of the present embodiment is preferably composed of a calcium aluminate-based compound and sucrose. Here, the calcium aluminate-based compound is a general term for compounds mainly composed of CaO and Al2O3 , and is not particularly limited. Specific examples thereof include CaO / Al 2O 3 , 12CaO / 7Al 2O 3 , 11CaO / 7Al 2O3 / CaF2 , 3CaO / Al2O3 , 3CaO / 3Al2O3 / CaSO 4 , and further, CaO. And an amorphous substance mainly composed of Al 2 O 3 (for example, CaO-Al 2 O 3 -SiO 2 system compound) and the like. Above all, it is preferable to select an amorphous substance from the viewpoint of strength development.
ここで、本実施形態における非晶質度とは、以下のように定義する。対象物質を１０００℃で２時間焼きなました後、５℃／分の冷却速度で徐冷して結晶化させる。そして、結晶化させたものを粉末Ｘ線回折法により測定し、結晶鉱物のメインピークの面積Ｓ０を求める。次いで、焼きなまし前の物質の結晶のメインピーク面積Ｓから、以下の式により非晶質度Ｘを求める。
Ｘ（％）＝１００×（１－Ｓ／Ｓ０） Here, the degree of amorphousness in this embodiment is defined as follows. The target substance is annealed at 1000 ° C. for 2 hours and then slowly cooled at a cooling rate of 5 ° C./min to crystallize. Then, the crystallized material is measured by powder X-ray diffraction method, and the area S0 of the main peak of the crystalline mineral is obtained. Next, the degree of amorphousness X is obtained from the main peak area S of the crystal of the substance before annealing by the following formula.
X (%) = 100 × (1-S / S 0 )
Ｘ（％）＝１００×（１－Ｓ／Ｓ０） Here, the degree of amorphousness in this embodiment is defined as follows. The target substance is annealed at 1000 ° C. for 2 hours and then slowly cooled at a cooling rate of 5 ° C./min to crystallize. Then, the crystallized material is measured by powder X-ray diffraction method, and the area S0 of the main peak of the crystalline mineral is obtained. Next, the degree of amorphousness X is obtained from the main peak area S of the crystal of the substance before annealing by the following formula.
X (%) = 100 × (1-S / S 0 )
なお、一般の工業原料にはＳｉＯ２、ＭｇＯ、Ｆｅ２Ｏ３、ＴｉＯ２、Ｋ２Ｏ、Ｎａ２Ｏ等の不純物が含まれているが、これらの不純物は、カルシウムアルミネート系化合物の非晶質化を助長する面もあり、これらの総量が２０％以下の範囲で存在しても差し支えない。中でも、ＳｉＯ２の存在は好ましく、非晶質物質を得る目的で、１～１８％の範囲で含有させることもできる。
It should be noted that general industrial raw materials contain impurities such as SiO 2 , MgO, Fe 2 O 3 , TIO 2 , K 2 O, and Na 2 O, but these impurities are not calcium aluminate compounds. It also promotes crystallization, and it does not matter if the total amount of these is in the range of 20% or less. Above all, the presence of SiO 2 is preferable, and it can be contained in the range of 1 to 18% for the purpose of obtaining an amorphous substance.
したがって、急硬材としては、ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系化合物とセッコウ類とを含み、このＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系化合物の非晶質度が７０％以上で、かつ、ＳｉＯ２が１～１８％の範囲であることが好ましい。より好ましくは、ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系化合物の非晶質度が８０％以上で、かつ、ＳｉＯ２が２～１３％の範囲である。
Therefore, the hardened material contains CaO-Al 2 O 3-SiO 2 system compound and sucrose, and the amorphous degree of this CaO-Al 2 O 3 -SiO 2 system compound is 70% or more, and the degree of amorphousness is 70% or more. , SiO 2 is preferably in the range of 1 to 18%. More preferably, the degree of amorphousness of the CaO-Al 2 O 3 -SiO 2 compound is 80% or more, and the SiO 2 is in the range of 2 to 13%.
カルシウムアルミネート系化合物は、粉砕処理により、ブレーン比表面積で３，０００～９，０００ｃｍ２／ｇに調整することが好ましく、４，０００～８，０００ｃｍ２／ｇに調整することがより好ましい。カルシウムアルミネート系化合物の粉末度（ブレーン比表面積）が、４，０００～９，０００ｃｍ２／ｇであることで十分な急硬性が得られやすくなり、低温での強度発現性も得られやすくなる。
The calcium aluminate-based compound is preferably adjusted to a brain specific surface area of 3,000 to 9,000 cm 2 / g by pulverization treatment, and more preferably adjusted to 4,000 to 8,000 cm 2 / g. When the degree of powderiness (brain specific surface area) of the calcium aluminate compound is 4,000 to 9,000 cm 2 / g, it becomes easy to obtain sufficient rapid hardness, and it becomes easy to obtain strength development at low temperature. ..
また、本実施形態の急硬材は、粉砕処理により、ブレーン比表面積で３，０００～９，０００ｃｍ２／ｇに調整することが好ましく、４，０００～８，０００ｃｍ２／ｇに調整することがより好ましい。急硬材の粉末度が、３，０００～９，０００ｃｍ２／ｇであることで十分な超速硬性が得られやすくなり、低温での強度発現性も得られやすくなる。
Further, the hardened material of the present embodiment is preferably adjusted to a brain specific surface area of 3,000 to 9,000 cm 2 / g by pulverization treatment, and is adjusted to 4,000 to 8,000 cm 2 / g. Is more preferable. When the powderiness of the hardened material is 3,000 to 9,000 cm 2 / g, it becomes easy to obtain sufficient ultrafast hardness, and it becomes easy to obtain strength development at low temperature.
急硬材の含有量は、セメントと急硬材との合計１００部中、１０～３５部が好ましく、１５～３０部がより好ましく、２０～２５部がさらに好ましい。１０～３５部であることで、良好な初期強度発現性が得られやすくなり、長期強度の低下も起こりにくくなる。
The content of the hardened material is preferably 10 to 35 parts, more preferably 15 to 30 parts, still more preferably 20 to 25 parts out of a total of 100 parts of the cement and the hardened material. When the content is 10 to 35 parts, good initial strength development is easily obtained, and long-term strength is less likely to decrease.
本実施形態で使用するセッコウ類は、無水セッコウ、半水セッコウ、二水セッコウのいずれのセッコウも使用できる。さらに天然セッコウや、リン酸副生セッコウ、排脱セッコウ、及びフッ酸副生セッコウなどの化学セッコウ、または、これらを熱処理して得られるセッコウなども使用できる。これらの中では、強度発現性の点で、無水セッコウ及び／又は半水セッコウが好ましいが、コストの観点から無水セッコウを選定することが望ましく、ＩＩ型無水セッコウ及び／又は天然無水セッコウが好ましい。セッコウの粒度はブレーン値で３，０００ｃｍ２／ｇ以上が好ましく、４，０００～７，０００ｃｍ２／ｇがより好ましい。３，０００ｃｍ２／ｇ以上であることで初期強度発現性を良好に発揮させることができる。
As the sequel used in the present embodiment, any sequel such as anhydrous sequel, semi-water sequel, and dihydrate sequel can be used. Further, natural sequels, chemical sewage such as phosphoric acid by-product sewage, excretion sewage, and hydrofluoric acid by-product sewage, or sewage obtained by heat-treating these can also be used. Among these, anhydrous'boke's and / or semi-hydrous'boke's are preferable in terms of strength development, but it is desirable to select anhydrous'boke's from the viewpoint of cost, and type II anhydrous'boke's and / or natural'boke's are preferable. The particle size of the sequel is preferably 3,000 cm 2 / g or more in terms of brain value, and more preferably 4,000 to 7,000 cm 2 / g. When it is 3,000 cm 2 / g or more, the initial strength development can be satisfactorily exhibited.
セッコウ類の使用量は、カルシウムアルミネート系化合物１００部に対して１０～２００部が好ましく、１５～１５０部がより好ましく、２０～１３０部がさらに好ましい。セッコウ類の使用量がこれらの範囲であることで強度発現性を良好に発揮させることができる。
The amount of the sucrose used is preferably 10 to 200 parts, more preferably 15 to 150 parts, still more preferably 20 to 130 parts with respect to 100 parts of the calcium aluminate compound. When the amount of sequel used is within these ranges, the strength development can be satisfactorily exhibited.
本実施形態では、既述の急硬材、眠剤、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤の他に、膨張材、減水剤、ＡＥ減水剤、高性能減水剤、高炉徐冷スラグ微粉末や高炉徐冷スラグ微粉末などのスラグ、石灰石微粉末やフライアッシュ、シリカフューム等の混和材料、消泡剤、増粘剤、防錆剤、防凍剤、収縮低減剤、ポリマー、ベントナイトなどの粘土鉱物、並びに、ハイドロタルサイトなどのアニオン交換体等のうちの一種又は二種以上を、本発明の目的を実質的に阻害しない範囲でＡ材及び／又はＢ材に使用することが可能である。
In this embodiment, in addition to the above-mentioned hardener, sleeping agent, aluminum, sulfur, sodium, and curing accelerator containing fluorine, an expansion material, a water reducing agent, an AE water reducing agent, a high-performance water reducing agent, and a blast furnace slow cooling. Slag such as slag fine powder and blast furnace slow cooling slag fine powder, admixture materials such as limestone fine powder, fly ash and silica fume, defoaming agent, thickener, rust preventive, antifreeze, shrinkage reducing agent, polymer, bentonite, etc. It is possible to use one or more of the clay minerals of the above and anion exchangers such as hydrotalcite for the A material and / or the B material as long as the object of the present invention is not substantially impaired. Is.
［２］生コン出荷型急硬コンクリート組成物
本実施形態に係る生コン出荷型急硬コンクリート組成物は、急硬セメント及び眠剤を含むＡ材と、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とが混合されてなる。そして、Ｂ材中のナトロアルナイトの含有量が０．３～５％となっている。なお、好ましい範囲等は、「２材型の生コン出荷型急硬コンクリート材料」で言及したものと同様である。 [2] Ready-mixed concrete shipping type hard concrete composition The ready-mixed concrete shipping type hard concrete composition according to the present embodiment contains A material containing hard cement and a sleeping agent, and aluminum, sulfur, sodium, and fluorine to promote curing. It is made by mixing with B material made of an agent. The content of natroalnite in the B material is 0.3 to 5%. The preferred range and the like are the same as those mentioned in "Two-material type ready-mixed concrete shipping type hardened concrete material".
本実施形態に係る生コン出荷型急硬コンクリート組成物は、急硬セメント及び眠剤を含むＡ材と、アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とが混合されてなる。そして、Ｂ材中のナトロアルナイトの含有量が０．３～５％となっている。なお、好ましい範囲等は、「２材型の生コン出荷型急硬コンクリート材料」で言及したものと同様である。 [2] Ready-mixed concrete shipping type hard concrete composition The ready-mixed concrete shipping type hard concrete composition according to the present embodiment contains A material containing hard cement and a sleeping agent, and aluminum, sulfur, sodium, and fluorine to promote curing. It is made by mixing with B material made of an agent. The content of natroalnite in the B material is 0.3 to 5%. The preferred range and the like are the same as those mentioned in "Two-material type ready-mixed concrete shipping type hardened concrete material".
生コンプラントでは、Ａ材を混合した各種のベースコンクリートを用意する必要があり、Ｂ材は現場まで搬送後に各種のベースコンクリートに対して添加混合する必要がある。Ｂ材を施工現場でなく生コンプラントで予め各種のベースコンクリートに対して混合すると、可使時間が確保できない。また、生コン工場で急硬材とＢ材の双方を添加すると、可使時間が極端に短くなり、搬送途中でコンクリートの破棄を余儀なくされる。
Ｂ材を生コン工場で添加し、施工現場で急硬材を添加する場合には、急硬材を添加した後の可使時間が１０分以下と極端に短くなり、施工ができない。急硬材とＢ材を施工現場で添加する場合には、可使時間が短縮され、圧縮強度も低い値となることに加え、アジテータのドラム容積の３０％程度しか搬送できない。このように、Ａ材とＢ材の添加タイミングは極めて重要である。 In the ready-mixed concrete plant, it is necessary to prepare various base concretes mixed with the A material, and the B material needs to be added and mixed with the various base concretes after being transported to the site. If the B material is mixed with various base concretes in advance at the ready-mixed concrete plant instead of at the construction site, the pot life cannot be secured. Further, if both the hardened material and the B material are added at the ready-mixed concrete factory, the pot life becomes extremely short, and the concrete is forced to be discarded during the transportation.
When the B material is added at the ready-mixed concrete factory and the hardened material is added at the construction site, the pot life after adding the hardened material becomes extremely short, 10 minutes or less, and the construction cannot be performed. When the hardened material and the B material are added at the construction site, the pot life is shortened, the compressive strength is low, and only about 30% of the drum volume of the agitator can be conveyed. As described above, the timing of adding the A material and the B material is extremely important.
Ｂ材を生コン工場で添加し、施工現場で急硬材を添加する場合には、急硬材を添加した後の可使時間が１０分以下と極端に短くなり、施工ができない。急硬材とＢ材を施工現場で添加する場合には、可使時間が短縮され、圧縮強度も低い値となることに加え、アジテータのドラム容積の３０％程度しか搬送できない。このように、Ａ材とＢ材の添加タイミングは極めて重要である。 In the ready-mixed concrete plant, it is necessary to prepare various base concretes mixed with the A material, and the B material needs to be added and mixed with the various base concretes after being transported to the site. If the B material is mixed with various base concretes in advance at the ready-mixed concrete plant instead of at the construction site, the pot life cannot be secured. Further, if both the hardened material and the B material are added at the ready-mixed concrete factory, the pot life becomes extremely short, and the concrete is forced to be discarded during the transportation.
When the B material is added at the ready-mixed concrete factory and the hardened material is added at the construction site, the pot life after adding the hardened material becomes extremely short, 10 minutes or less, and the construction cannot be performed. When the hardened material and the B material are added at the construction site, the pot life is shortened, the compressive strength is low, and only about 30% of the drum volume of the agitator can be conveyed. As described above, the timing of adding the A material and the B material is extremely important.
そこで、本実施形態では、Ａ材と、Ｂ材とからなる２材型とすることで、具体的には、生コンプラントでＡ材を混合したベースコンクリートを施工現場まで搬送し、施工現場でＢ材を混合することで、本実施形態の生コン出荷型急硬コンクリート組成物とすることができる。
Therefore, in the present embodiment, by adopting a two-material mold composed of A material and B material, specifically, the base concrete mixed with A material is transported to the construction site at the ready-mixed concrete plant, and B at the construction site. By mixing the materials, the ready-mixed concrete shipping type hardened concrete composition of the present embodiment can be obtained.
［生コン出荷型急硬コンクリートの調製方法］
本発明の生コン出荷型急硬コンクリートの調製方法の実施形態は、少なくともＡ材を混練水とともに練り混ぜ用容器内で練り混ぜてベースコンクリートとする工程（練り混ぜ工程）と、さらに、Ｂ材を例えば施工現場で混合する工程と、を順次含む。
なお、上記混練水は例えば、生コン工場や生コンプラント等から供給される。また、練り混ぜ工程では、練り混ぜとともに運搬も行われる場合が多い。 [Preparation method for ready-mixed concrete shipping type hard concrete]
In the embodiment of the method for preparing ready-mixed concrete for shipping ready-mixed concrete of the present invention, at least material A is kneaded together with kneading water in a kneading container to form a base concrete (kneading step), and further, material B is used. For example, the process of mixing at the construction site is sequentially included.
The kneaded water is supplied from, for example, a ready-mixed concrete factory or a ready-mixed concrete plant. Further, in the kneading process, transportation is often performed together with kneading.
本発明の生コン出荷型急硬コンクリートの調製方法の実施形態は、少なくともＡ材を混練水とともに練り混ぜ用容器内で練り混ぜてベースコンクリートとする工程（練り混ぜ工程）と、さらに、Ｂ材を例えば施工現場で混合する工程と、を順次含む。
なお、上記混練水は例えば、生コン工場や生コンプラント等から供給される。また、練り混ぜ工程では、練り混ぜとともに運搬も行われる場合が多い。 [Preparation method for ready-mixed concrete shipping type hard concrete]
In the embodiment of the method for preparing ready-mixed concrete for shipping ready-mixed concrete of the present invention, at least material A is kneaded together with kneading water in a kneading container to form a base concrete (kneading step), and further, material B is used. For example, the process of mixing at the construction site is sequentially included.
The kneaded water is supplied from, for example, a ready-mixed concrete factory or a ready-mixed concrete plant. Further, in the kneading process, transportation is often performed together with kneading.
練り混ぜ工程においては、少なくとも、Ａ材及び混練水を含むベースコンクリートの容量を、練り混ぜ（運搬）用容器の内容積の４０容量％以上とすることが好ましく、５０容量％以上とすることがより好ましい。
ここで、練り混ぜ（運搬）用容器とは、例えば、アジテータ車のドラム等のような生コン運搬車に備え付けられ、生コンを撹拌しながら保持できる容器をいう。 In the kneading step, the capacity of the base concrete containing the material A and the kneading water is preferably 40% by volume or more, preferably 50% by volume or more of the internal volume of the kneading (transporting) container. More preferred.
Here, the kneading (transporting) container is a container provided in a ready-mixed concrete transport vehicle such as a drum of an agitator truck and capable of holding the ready-mixed concrete while stirring.
ここで、練り混ぜ（運搬）用容器とは、例えば、アジテータ車のドラム等のような生コン運搬車に備え付けられ、生コンを撹拌しながら保持できる容器をいう。 In the kneading step, the capacity of the base concrete containing the material A and the kneading water is preferably 40% by volume or more, preferably 50% by volume or more of the internal volume of the kneading (transporting) container. More preferred.
Here, the kneading (transporting) container is a container provided in a ready-mixed concrete transport vehicle such as a drum of an agitator truck and capable of holding the ready-mixed concrete while stirring.
そして、Ｂ材を混合した後の可使時間が１０分以上、好ましくは１５分以上確保できるようにＢ材の種類、既述の量論比を適切な範囲に定めることが好ましい。
Then, it is preferable to set the type of B material and the above-mentioned stoichiometric ratio within an appropriate range so that the pot life after mixing the B material can be secured for 10 minutes or more, preferably 15 minutes or more.
以上のように、本実施形態に係る２材型の生コン出荷型急硬コンクリート材料は、生コン（レディミクストコンクリート）を混練した後、この混練物が搬送されて施工現場に出荷され、打ち込み作業後に添加される材料としての使用に好適である。そして、可使時間を例えば、１２０分以上、好ましくは１８０分以上とすることができる。
As described above, in the two-material ready-mixed concrete shipping type hard concrete material according to the present embodiment, after the ready-mixed concrete (ready-mixed concrete) is kneaded, the kneaded material is transported and shipped to the construction site, and after the driving work. Suitable for use as an added material. The pot life can be set to, for example, 120 minutes or more, preferably 180 minutes or more.
以下、実験例に基づいて、本発明をさらに詳細に説明するが、本発明はこれらに限定されるものではない。
Hereinafter, the present invention will be described in more detail based on experimental examples, but the present invention is not limited thereto.
（実験Ｎｏ．１－１～１－２９）
Ａｌ２Ｏ３換算におけるアルミニウム、ＳＯ３換算における硫黄、Ｎａ２Ｏ換算におけるナトリウム、及びフッ素の各割合が表１に示す割合となるように、水に硫酸アルミニウムと氷晶石を混合し、９０℃で６０分間加熱した。加熱後、５０分間で２５℃となるように循環冷却装置により、急冷して硬化促進剤としてのＢ材を製造した。Ｂ材の固形分濃度、Ｂ材の２０℃における粘度を下記のようにして測定した。また、ｐＨメータによりＢ材のｐＨを測定した。結果を表１に示す。 (Experiment Nos. 1-1 to 1-29)
Aluminum sulfate and cryolite are mixed with water so that the ratios of aluminum in Al 2 O 3 conversion, sulfur in SO 3 conversion, sodium in Na 2 O conversion, and fluorine are the ratios shown in Table 1, and 90 It was heated at ° C. for 60 minutes. After heating, the material B was rapidly cooled by a circulation cooling device so that the temperature reached 25 ° C. in 50 minutes to produce a material B as a curing accelerator. The solid content concentration of the B material and the viscosity of the B material at 20 ° C. were measured as follows. In addition, the pH of the B material was measured with a pH meter. The results are shown in Table 1.
Ａｌ２Ｏ３換算におけるアルミニウム、ＳＯ３換算における硫黄、Ｎａ２Ｏ換算におけるナトリウム、及びフッ素の各割合が表１に示す割合となるように、水に硫酸アルミニウムと氷晶石を混合し、９０℃で６０分間加熱した。加熱後、５０分間で２５℃となるように循環冷却装置により、急冷して硬化促進剤としてのＢ材を製造した。Ｂ材の固形分濃度、Ｂ材の２０℃における粘度を下記のようにして測定した。また、ｐＨメータによりＢ材のｐＨを測定した。結果を表１に示す。 (Experiment Nos. 1-1 to 1-29)
Aluminum sulfate and cryolite are mixed with water so that the ratios of aluminum in Al 2 O 3 conversion, sulfur in SO 3 conversion, sodium in Na 2 O conversion, and fluorine are the ratios shown in Table 1, and 90 It was heated at ° C. for 60 minutes. After heating, the material B was rapidly cooled by a circulation cooling device so that the temperature reached 25 ° C. in 50 minutes to produce a material B as a curing accelerator. The solid content concentration of the B material and the viscosity of the B material at 20 ° C. were measured as follows. In addition, the pH of the B material was measured with a pH meter. The results are shown in Table 1.
＜使用材料＞
・水：水道水
・硫酸アルミニウム：硫酸バンド粉末（１４～１８水）、試薬
・氷晶石：試薬 チオライト：２％、エルパソライト：０．５％（ＸＲＤにより測定） <Material used>
・ Water: Tap water ・ Aluminum sulfate: Sulfate band powder (14-18 water), Reagent ・ Cryolite: Reagent Thiorite: 2%, Elpasolite: 0.5% (measured by XRD)
・水：水道水
・硫酸アルミニウム：硫酸バンド粉末（１４～１８水）、試薬
・氷晶石：試薬 チオライト：２％、エルパソライト：０．５％（ＸＲＤにより測定） <Material used>
・ Water: Tap water ・ Aluminum sulfate: Sulfate band powder (14-18 water), Reagent ・ Cryolite: Reagent Thiorite: 2%, Elpasolite: 0.5% (measured by XRD)
・固形分濃度：原料からのＳＯ３、Ａｌ２Ｏ３、氷晶石の合計量を求めた。
・粘度（２０℃）：Ｂ回転粘度計を用いて、測定した。 -Solid content concentration: The total amount of SO 3 , Al 2 O 3 , and cryolite from the raw material was determined.
Viscosity (20 ° C.): Measured using a B-rotation viscometer.
・粘度（２０℃）：Ｂ回転粘度計を用いて、測定した。 -Solid content concentration: The total amount of SO 3 , Al 2 O 3 , and cryolite from the raw material was determined.
Viscosity (20 ° C.): Measured using a B-rotation viscometer.
Ｂ材５０ｇを２０℃で４８時間保管した。その後、下記のようにしてナトロアルナイトの析出量を測定した。結果を表１に示す。
50 g of B material was stored at 20 ° C. for 48 hours. Then, the amount of natroalnite precipitated was measured as follows. The results are shown in Table 1.
・ナトロアルナイトの含有量
保管したＢ材５０ｇをガラスフィルターに流して、吸引ろ過し、更に真空デシケーターで２４時間乾燥させたサンプルについてＸ線回折の測定を行った。ナトロアルナイト単味のピーク強度と、サンプルのナトロアルナイトのピーク強度を比較して、含有量として求めた。 -Contents of natroalnite 50 g of the stored B material was flowed through a glass filter, suction-filtered, and further dried in a vacuum desiccator for 24 hours, and X-ray diffraction was measured. The peak intensity of natroalnite alone was compared with the peak intensity of natroalnite in the sample, and the content was determined.
保管したＢ材５０ｇをガラスフィルターに流して、吸引ろ過し、更に真空デシケーターで２４時間乾燥させたサンプルについてＸ線回折の測定を行った。ナトロアルナイト単味のピーク強度と、サンプルのナトロアルナイトのピーク強度を比較して、含有量として求めた。 -Contents of natroalnite 50 g of the stored B material was flowed through a glass filter, suction-filtered, and further dried in a vacuum desiccator for 24 hours, and X-ray diffraction was measured. The peak intensity of natroalnite alone was compared with the peak intensity of natroalnite in the sample, and the content was determined.
セメント３７５ｋｇ／ｍ３、急硬材１２５ｋｇ／ｍ３、水／結合材比３２％、ｓ／ａ＝４２％、空気量２．０±１．５容量％の急硬コンクリートを調製した。この際、セメントと急硬材からなる結合材１００部に対して、眠剤を１．５部添加し、２４時間以上、水和硬化しないようにした（Ａ材）。現場までの搬送時間と施工現場に到着後に待機時間が発生したことを想定して、１２０分後に硬化促進剤としてのＢ材を下記表１に示す量論比で添加した。Ｂ材を添加してからの可使時間を測定するとともに、Ｂ材添加後から６時間後（練り上がりから８時間後）の圧縮強度を測定した。なお、ｓ／ａは、細骨材率で、コンクリート中の全骨材量に対する細骨材量の絶対容積比を百分率で表した値である。また、環境温度は２０℃とした。また、量論比は既述の式（１）から計算した。
Hardened concrete with cement 375 kg / m 3 , hardened material 125 kg / m 3 , water / binder ratio 32%, s / a = 42%, and air volume 2.0 ± 1.5 volume% was prepared. At this time, 1.5 parts of a hypnotic was added to 100 parts of the binder made of cement and a hardened material to prevent hydration and hardening for 24 hours or more (material A). Assuming that the transportation time to the site and the waiting time after arriving at the construction site occurred, the B material as a curing accelerator was added 120 minutes later in the stoichiometric ratio shown in Table 1 below. The pot life after the addition of the B material was measured, and the compressive strength was measured 6 hours after the addition of the B material (8 hours after the kneading). In addition, s / a is a fine aggregate ratio, which is a value expressed as a percentage of the absolute volume ratio of the fine aggregate amount to the total aggregate amount in concrete. The environmental temperature was 20 ° C. The stoichiometric ratio was calculated from the above equation (1).
＜使用材料＞
・急硬材：ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系非晶質物質と無水セッコウの等量混合物。ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系非晶質物質のＣａＯが４３％、Ａｌ２Ｏ３が４４％、ＳｉＯ２が１０％、その他３％。密度２．８５ｇ／ｃｍ３、ブレーン比表面積５，０００ｃｍ２／ｇ、非晶質度９０％
・眠剤：試薬１級の炭酸カリウム７５部と試薬１級のクエン酸２５部の混合物
・セメント：市販の普通ポルトランドセメント（デンカ社製、密度３．１５ｇ／ｃｍ３）
・無水石膏：ＩＩ型無水石膏、ｐＨ３．０、ブレーン比表面積５，０００ｃｍ２／ｇ
・水：水道水
・細骨材：天然川砂
・粗骨材：砕石 <Material used>
-Hard material: An equal amount mixture of CaO-Al 2 O 3 -SiO 2 amorphous substance and anhydrous secco. CaO-Al 2 O 3 -SiO 2 amorphous substance CaO is 43%, Al 2 O 3 is 44%, SiO 2 is 10%, and others are 3%. Density 2.85 g / cm 3 , Brain specific surface area 5,000 cm 2 / g, Amorphousness 90%
・ Sleeping agent: A mixture of 75 parts of potassium carbonate of the first grade of reagent and 25 parts of citric acid of the first grade of reagent ・ Cement: Commercially available ordinary Portland cement (manufactured by Denka, density 3.15 g / cm 3 )
-Anhydrite: Type II anhydrous gypsum, pH 3.0, brain specific surface area 5,000 cm 2 / g
・ Water: Tap water ・ Fine aggregate: Natural river sand ・ Coarse aggregate: Crushed stone
・急硬材：ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系非晶質物質と無水セッコウの等量混合物。ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系非晶質物質のＣａＯが４３％、Ａｌ２Ｏ３が４４％、ＳｉＯ２が１０％、その他３％。密度２．８５ｇ／ｃｍ３、ブレーン比表面積５，０００ｃｍ２／ｇ、非晶質度９０％
・眠剤：試薬１級の炭酸カリウム７５部と試薬１級のクエン酸２５部の混合物
・セメント：市販の普通ポルトランドセメント（デンカ社製、密度３．１５ｇ／ｃｍ３）
・無水石膏：ＩＩ型無水石膏、ｐＨ３．０、ブレーン比表面積５，０００ｃｍ２／ｇ
・水：水道水
・細骨材：天然川砂
・粗骨材：砕石 <Material used>
-Hard material: An equal amount mixture of CaO-Al 2 O 3 -SiO 2 amorphous substance and anhydrous secco. CaO-Al 2 O 3 -SiO 2 amorphous substance CaO is 43%, Al 2 O 3 is 44%, SiO 2 is 10%, and others are 3%. Density 2.85 g / cm 3 , Brain specific surface area 5,000 cm 2 / g, Amorphousness 90%
・ Sleeping agent: A mixture of 75 parts of potassium carbonate of the first grade of reagent and 25 parts of citric acid of the first grade of reagent ・ Cement: Commercially available ordinary Portland cement (manufactured by Denka, density 3.15 g / cm 3 )
-Anhydrite: Type II anhydrous gypsum, pH 3.0, brain specific surface area 5,000 cm 2 / g
・ Water: Tap water ・ Fine aggregate: Natural river sand ・ Coarse aggregate: Crushed stone
＜測定方法＞
・可使時間：ＪＩＳ Ａ １１４７に準じて凝結の始発時間を測定し、可使時間とした。
・圧縮強度：ＪＩＳ Ａ １１０８に準じて測定した。 <Measurement method>
-Available time: The starting time of condensation was measured according to JIS A 1147 and used as the potable time.
-Compressive strength: Measured according to JIS A 1108.
・可使時間：ＪＩＳ Ａ １１４７に準じて凝結の始発時間を測定し、可使時間とした。
・圧縮強度：ＪＩＳ Ａ １１０８に準じて測定した。 <Measurement method>
-Available time: The starting time of condensation was measured according to JIS A 1147 and used as the potable time.
-Compressive strength: Measured according to JIS A 1108.
本発明の２材型の生コン出荷型急硬コンクリート材料及び生コン出荷型急硬コンクリート組成物は、低温環境下でも十分な可使時間を確保しつつ、初期の強度発現性に優れるため、特に、土木建築分野で好適に用いられる。
In particular, the two-material ready-mixed concrete shipping type hard concrete material and the ready-mixed concrete shipping type hard concrete composition of the present invention have excellent initial strength development while ensuring sufficient pot life even in a low temperature environment. It is suitably used in the field of civil engineering and construction.
Claims (10)
- 急硬セメント及び眠剤を含むＡ材と、
アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とを含み、
前記Ｂ材中のナトロアルナイトの含有量が０．３～５質量％である２材型の生コン出荷型急硬コンクリート材料。 A material containing hard cement and sleeping pills,
Includes B material consisting of a curing accelerator containing aluminum, sulfur, sodium, and fluorine.
A two-material ready-mixed ready-mixed concrete material having a content of natroalnite in the B material of 0.3 to 5% by mass. - 下記式（１）で表される前記眠剤と前記Ｂ材との量論比が０．５～５である請求項１に記載の２材型の生コン出荷型急硬コンクリート材料。
式（１）：量論比＝［Ｂ材中アルミニウムの物質量（ｍｏｌ）］×アルミニウムの数×アルミニウムイオンの価数／（眠剤に配合されるオキシカルボン酸の物質量（ｍｏｌ）×眠剤に配合されるオキシカルボン酸の価数） The two-material ready-mixed concrete shipping type hard concrete material according to claim 1, wherein the stoichiometric ratio of the hypnotic to the B material represented by the following formula (1) is 0.5 to 5.
Formula (1): Quantitative ratio = [Amount of substance of aluminum in B material (mol)] x number of aluminum x valence of aluminum ions / (amount of substance of oxycarboxylic acid contained in sleeping pills (mol) x sleep The valence of the oxycarboxylic acid contained in the agent) - 前記Ｂ材作製の直後から、０～４０℃で４８時間保存した後であって、前記Ｂ材中の前記ナトロアルナイトの含有量が５質量％以下である請求項１又は２に記載の２材型の生コン出荷型急硬コンクリート材料。 2. The second aspect of claim 1 or 2, wherein the content of the natroalnite in the B material is 5% by mass or less immediately after the preparation of the B material and after the storage at 0 to 40 ° C. for 48 hours. Ready-mixed concrete shipping type hard concrete material.
- 前記Ｂ材に含有されるナトロアルナイトが氷晶石に由来する請求項１～３のいずれか１項に記載の２材型の生コン出荷型急硬コンクリート材料。 The two-material type ready-mixed concrete shipping type hard concrete material according to any one of claims 1 to 3, wherein the natroalnite contained in the B material is derived from cryolite.
- 前記Ｂ材のｐＨが１～４である請求項１～４のいずれか１項に記載の２材型の生コン出荷型急硬コンクリート材料。 The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of claims 1 to 4, wherein the pH of the B material is 1 to 4.
- 前記Ｂ材中の前記アルミニウムがＡｌ２Ｏ３換算で０．１～２０質量部、前記硫黄がＳＯ３換算で０．１～３０質量部、前記ナトリウムがＮａ２Ｏ換算で０．０１～５質量部、及び前記フッ素が０．０１～１０質量部である請求項１～５のいずれか１項に記載の２材型の生コン出荷型急硬コンクリート材料。 The aluminum in the B material is 0.1 to 20 parts by mass in terms of Al 2 O 3 , the sulfur is 0.1 to 30 parts by mass in terms of SO 3 , and the sodium is 0.01 to 5 parts in terms of Na 2 O. The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of claims 1 to 5, wherein the part is by mass and the amount of fluorine is 0.01 to 10 parts by mass.
- 前記Ｂ材の固形分濃度が２０～７０質量％である請求項１～６のいずれか１項に記載の２材型の生コン出荷型急硬コンクリート材料。 The two-material type ready-mixed concrete shipping type hardened concrete material according to any one of claims 1 to 6, wherein the solid content concentration of the B material is 20 to 70% by mass.
- 前記Ｂ材の２０℃における粘度が１，４００ｍＰａ・ｓ以下である請求項１～７のいずれか１項に記載の２材型の生コン出荷型急硬コンクリート材料。 The two-material ready-mixed concrete shipping type hard concrete material according to any one of claims 1 to 7, wherein the viscosity of the B material at 20 ° C. is 1,400 mPa · s or less.
- Ａｌ２Ｏ３換算での前記アルミニウムとＳＯ３換算での前記硫黄との質量比（Ａｌ２Ｏ３／ＳＯ３）が０．０５～１．０である請求項１～８のいずれか１項に記載の２材型の生コン出荷型急硬コンクリート材料。 One of claims 1 to 8, wherein the mass ratio (Al 2 O 3 / SO 3 ) of the aluminum in terms of Al 2 O 3 and the sulfur in terms of SO 3 is 0.05 to 1.0. The two-material type ready-mixed concrete shipping type hardened concrete material described in.
- 急硬セメント及び眠剤を含むＡ材と、
アルミニウム、硫黄、ナトリウム、及びフッ素を含む硬化促進剤からなるＢ材とを含み、
前記Ｂ材中のナトロアルナイトの含有量が０．３～５質量％である生コン出荷型急硬コンクリート組成物。 A material containing hard cement and sleeping pills,
Includes B material consisting of a curing accelerator containing aluminum, sulfur, sodium, and fluorine.
A ready-mixed concrete shipping type hardened concrete composition in which the content of natroalnite in the B material is 0.3 to 5% by mass.
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| JPH1121160A (en) * | 1997-07-01 | 1999-01-26 | Ube Ind Ltd | Ultra high speed hardening nonshrinkable grout material |
| JP2007045654A (en) * | 2005-08-09 | 2007-02-22 | Taiheiyo Material Kk | Method of producing rapid hardening concrete |
| JP2014152055A (en) * | 2013-02-06 | 2014-08-25 | Denki Kagaku Kogyo Kk | Liquid quick setting agent, cement composition using the same, and spraying method |
| JP2014152058A (en) * | 2013-02-06 | 2014-08-25 | Denki Kagaku Kogyo Kk | Liquid quick setting agent, cement composition using the same, and spraying method |
| WO2018154890A1 (en) * | 2017-02-22 | 2018-08-30 | デンカ株式会社 | Hardening agent for ready-mix shipped rapid-hardening concrete, ready-mix shipped rapid-hardening concrete material, ready-mix shipped rapid-hardening concrete composition, and method for preparing same |
| WO2020039908A1 (en) * | 2018-08-22 | 2020-02-27 | デンカ株式会社 | Hardening agent for ready-mix shipped rapid-hardening concrete, ready-mix shipped rapid-hardening concrete material, ready-mix shipped rapid-hardening concrete composition, and method for preparing same |
| JP6785389B1 (en) * | 2020-03-12 | 2020-11-18 | デンカ株式会社 | Liquid quick-setting agent and quick-setting cement concrete |
-
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| JPH1121160A (en) * | 1997-07-01 | 1999-01-26 | Ube Ind Ltd | Ultra high speed hardening nonshrinkable grout material |
| JP2007045654A (en) * | 2005-08-09 | 2007-02-22 | Taiheiyo Material Kk | Method of producing rapid hardening concrete |
| JP2014152055A (en) * | 2013-02-06 | 2014-08-25 | Denki Kagaku Kogyo Kk | Liquid quick setting agent, cement composition using the same, and spraying method |
| JP2014152058A (en) * | 2013-02-06 | 2014-08-25 | Denki Kagaku Kogyo Kk | Liquid quick setting agent, cement composition using the same, and spraying method |
| WO2018154890A1 (en) * | 2017-02-22 | 2018-08-30 | デンカ株式会社 | Hardening agent for ready-mix shipped rapid-hardening concrete, ready-mix shipped rapid-hardening concrete material, ready-mix shipped rapid-hardening concrete composition, and method for preparing same |
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