JP4627153B2 - Suspension type ground improvement material and manufacturing method thereof - Google Patents
Suspension type ground improvement material and manufacturing method thereof Download PDFInfo
- Publication number
- JP4627153B2 JP4627153B2 JP2004168733A JP2004168733A JP4627153B2 JP 4627153 B2 JP4627153 B2 JP 4627153B2 JP 2004168733 A JP2004168733 A JP 2004168733A JP 2004168733 A JP2004168733 A JP 2004168733A JP 4627153 B2 JP4627153 B2 JP 4627153B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- suspension
- stimulant
- ground improvement
- improvement material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 title claims description 84
- 239000000725 suspension Substances 0.000 title claims description 66
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 125
- 239000002893 slag Substances 0.000 claims description 81
- 239000003513 alkali Substances 0.000 claims description 45
- 239000000126 substance Substances 0.000 claims description 45
- 229920000642 polymer Polymers 0.000 claims description 38
- 239000003638 chemical reducing agent Substances 0.000 claims description 23
- 239000002689 soil Substances 0.000 claims description 19
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 210000004556 brain Anatomy 0.000 claims description 6
- 239000010419 fine particle Substances 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 29
- 238000002347 injection Methods 0.000 description 26
- 239000007924 injection Substances 0.000 description 26
- 239000011440 grout Substances 0.000 description 25
- 238000004898 kneading Methods 0.000 description 25
- 239000002270 dispersing agent Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 150000008064 anhydrides Chemical class 0.000 description 15
- 239000013078 crystal Substances 0.000 description 15
- 230000035699 permeability Effects 0.000 description 15
- 239000000203 mixture Substances 0.000 description 14
- 239000002245 particle Substances 0.000 description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 12
- 235000019353 potassium silicate Nutrition 0.000 description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 230000035515 penetration Effects 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- KVWWIYGFBYDJQC-GHMZBOCLSA-N Methyl dihydrojasmonate Chemical compound CCCCC[C@@H]1[C@@H](CC(=O)OC)CCC1=O KVWWIYGFBYDJQC-GHMZBOCLSA-N 0.000 description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 7
- 239000000920 calcium hydroxide Substances 0.000 description 7
- 235000011116 calcium hydroxide Nutrition 0.000 description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 7
- 239000004568 cement Substances 0.000 description 7
- 239000011976 maleic acid Substances 0.000 description 7
- 229920000609 methyl cellulose Polymers 0.000 description 7
- 239000001923 methylcellulose Substances 0.000 description 7
- 235000010981 methylcellulose Nutrition 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- 238000010998 test method Methods 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 description 6
- 235000011152 sodium sulphate Nutrition 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 235000012255 calcium oxide Nutrition 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- 150000001447 alkali salts Chemical class 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 description 4
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229910052936 alkali metal sulfate Inorganic materials 0.000 description 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 3
- 239000008119 colloidal silica Substances 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 3
- 229920001282 polysaccharide Polymers 0.000 description 3
- 239000005017 polysaccharide Substances 0.000 description 3
- 150000004804 polysaccharides Chemical class 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 2
- JTNCEQNHURODLX-UHFFFAOYSA-N 2-phenylethanimidamide Chemical compound NC(=N)CC1=CC=CC=C1 JTNCEQNHURODLX-UHFFFAOYSA-N 0.000 description 2
- 102000011632 Caseins Human genes 0.000 description 2
- 108010076119 Caseins Proteins 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000004111 Potassium silicate Substances 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 235000010443 alginic acid Nutrition 0.000 description 2
- 229920000615 alginic acid Polymers 0.000 description 2
- -1 alkylene glycol Chemical compound 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 159000000011 group IA salts Chemical class 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- SUPUVLWGKPVHBQ-UHFFFAOYSA-M lithium sulfite Chemical compound [Li+].OS([O-])=O SUPUVLWGKPVHBQ-UHFFFAOYSA-M 0.000 description 2
- HPCCWDVOHHFCKM-UHFFFAOYSA-M lithium;hydrogen sulfate Chemical compound [Li+].OS([O-])(=O)=O HPCCWDVOHHFCKM-UHFFFAOYSA-M 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 229920001206 natural gum Polymers 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910000343 potassium bisulfate Inorganic materials 0.000 description 2
- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 description 2
- 229940099427 potassium bisulfite Drugs 0.000 description 2
- 235000010259 potassium hydrogen sulphite Nutrition 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 2
- 229910052913 potassium silicate Inorganic materials 0.000 description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 description 2
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 235000019252 potassium sulphite Nutrition 0.000 description 2
- VLYFRFHWUBBLRR-UHFFFAOYSA-L potassium;sodium;carbonate Chemical compound [Na+].[K+].[O-]C([O-])=O VLYFRFHWUBBLRR-UHFFFAOYSA-L 0.000 description 2
- NRTBZBYBLPEOCE-UHFFFAOYSA-L potassium;sodium;sulfite Chemical compound [Na+].[K+].[O-]S([O-])=O NRTBZBYBLPEOCE-UHFFFAOYSA-L 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 2
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 2
- WPJGWJITSIEFRP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;hydrate Chemical class O.NC1=NC(N)=NC(N)=N1 WPJGWJITSIEFRP-UHFFFAOYSA-N 0.000 description 1
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 description 1
- 244000215068 Acacia senegal Species 0.000 description 1
- WZUKKIPWIPZMAS-UHFFFAOYSA-K Ammonium alum Chemical compound [NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O WZUKKIPWIPZMAS-UHFFFAOYSA-K 0.000 description 1
- XWBIMXZDSNRPKV-UHFFFAOYSA-N C=O.S(N)(O)(=O)=O.N1=C(N)N=C(N)N=C1N Chemical compound C=O.S(N)(O)(=O)=O.N1=C(N)N=C(N)N=C1N XWBIMXZDSNRPKV-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 1
- 108010068370 Glutens Proteins 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- 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 description 1
- 229920000161 Locust bean gum Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- RXBBNFREANQMDI-UHFFFAOYSA-L [Li+].[Na+].[O-]S([O-])=O Chemical compound [Li+].[Na+].[O-]S([O-])=O RXBBNFREANQMDI-UHFFFAOYSA-L 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 229940072056 alginate Drugs 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 229960001126 alginic acid Drugs 0.000 description 1
- 150000004781 alginic acids Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910000318 alkali metal phosphate Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000011124 aluminium ammonium sulphate Nutrition 0.000 description 1
- 235000011126 aluminium potassium sulphate Nutrition 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 description 1
- 239000002269 analeptic agent Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- FGRVOLIFQGXPCT-UHFFFAOYSA-L dipotassium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [K+].[K+].[O-]S([O-])(=O)=S FGRVOLIFQGXPCT-UHFFFAOYSA-L 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 235000021312 gluten Nutrition 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- HFBKKNJVQYNVDO-UHFFFAOYSA-L lithium;potassium;sulfate Chemical compound [Li+].[K+].[O-]S([O-])(=O)=O HFBKKNJVQYNVDO-UHFFFAOYSA-L 0.000 description 1
- AUVRFMARQSYEAJ-UHFFFAOYSA-L lithium;potassium;sulfite Chemical compound [Li+].[K+].[O-]S([O-])=O AUVRFMARQSYEAJ-UHFFFAOYSA-L 0.000 description 1
- SGDQMWNLOSTDSU-UHFFFAOYSA-L lithium;sodium;sulfate Chemical compound [Li+].[Na+].[O-]S([O-])(=O)=O SGDQMWNLOSTDSU-UHFFFAOYSA-L 0.000 description 1
- 235000010420 locust bean gum Nutrition 0.000 description 1
- 239000000711 locust bean gum Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000007974 melamines Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- ZDHURYWHEBEGHO-UHFFFAOYSA-N potassiopotassium Chemical compound [K].[K] ZDHURYWHEBEGHO-UHFFFAOYSA-N 0.000 description 1
- 229940050271 potassium alum Drugs 0.000 description 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 1
- UOVHNSMBKKMHHP-UHFFFAOYSA-L potassium;sodium;sulfate Chemical compound [Na+].[K+].[O-]S([O-])(=O)=O UOVHNSMBKKMHHP-UHFFFAOYSA-L 0.000 description 1
- 238000009702 powder compression Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 235000011127 sodium aluminium sulphate Nutrition 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 229940080237 sodium caseinate Drugs 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000008109 sodium starch glycolate Substances 0.000 description 1
- 229940079832 sodium starch glycolate Drugs 0.000 description 1
- 229920003109 sodium starch glycolate Polymers 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- DFIWJEVKLWMZBI-UHFFFAOYSA-M sodium;dihydrogen phosphate;phosphoric acid Chemical compound [Na+].OP(O)(O)=O.OP(O)([O-])=O DFIWJEVKLWMZBI-UHFFFAOYSA-M 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000021 stimulant Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- VOVCASRUQMXLSQ-UHFFFAOYSA-N sulfamic acid;1,3,5-triazine-2,4,6-triamine Chemical compound NS(O)(=O)=O.NC1=NC(N)=NC(N)=N1 VOVCASRUQMXLSQ-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- RLQWHDODQVOVKU-UHFFFAOYSA-N tetrapotassium;silicate Chemical compound [K+].[K+].[K+].[K+].[O-][Si]([O-])([O-])[O-] RLQWHDODQVOVKU-UHFFFAOYSA-N 0.000 description 1
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229920003170 water-soluble synthetic polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
本発明は、懸濁型地盤改良材、及びその製造方法に関する。さらに詳しくは、水、微粒子水砕スラグ、アルカリ刺激剤、分散剤、水に溶解又は分散して粘性を与える高分子物質、及び固結性改良剤を主成分として含有する懸濁型地盤改良材、及びその製造方法である。
本発明の懸濁型地盤改良材は、細かな粒径のシルト質土を比較的高い比率で含む、粒度分布の広い土質である地盤への浸透性に優れ、かつゲル化までの液粘性が低く安定であり、またゲル化後の固結体強度がセメント並みの高強度を発現する。
The present invention relates to a suspension-type ground improvement material and a method for producing the same. More specifically, a suspension-type ground improvement material containing water, fine-particle granulated slag, alkali stimulant, dispersant, a polymer substance that dissolves or disperses in water to give viscosity, and a caking improver as main components. And its manufacturing method.
The suspension type ground improvement material of the present invention is excellent in permeability to the soil having a wide particle size distribution including a relatively high ratio of silty soil with a fine particle size, and has a liquid viscosity until gelation. It is low and stable, and the strength of the solidified body after gelation is as high as cement.
軟弱地盤の強化、安定化等を目的として、また地盤の液状化現象を防止する対策として、グラウト材を使用する薬液注入工法(グラウト工法)が広く用いられている。
これまで、種々のグラウト材(地盤注入薬液)、及びこれらを用いる工法が提案され、実用化されている。いずれのグラウト材に対しても、固化後の強度、ゲルタイム調整の容易さ、地盤への浸透性、環境への影響等様々な性能が要求されている。
現在、最も多く用いられているのは水ガラスを主剤とするグラウト材である。この種のグラウト材は、浸透性に優れている特徴を有するが、固結強度の安定性が劣る欠点が指摘されている。すなわち、水ガラス系グラウト材の多くは、固結後に於いても地下水中へのアルカリ成分や珪酸成分の溶出が認められ、固結強度が経時的に低下する。そのため短期間の仮設用の地盤注入固結薬剤としての使用が一般的であり、長期仮設や永久的な地盤改良には向かない。
また、水ガラス系グラウト材について、地下水の多い砂地盤を高強度に固結する方法として、水ガラス系グラウト材に増粘剤を溶かして、注入材が粘度を有する水溶液とする方法が提案されている。この方法では、注入液が地下水により希釈され難いので、液状化現象を防止できるとされている(例えば、特許文献4参照)。
A chemical solution injection method (grouting method) using a grout material is widely used for the purpose of strengthening and stabilizing soft ground, and as a measure for preventing the liquefaction phenomenon of the ground.
So far, various grout materials (ground injection chemicals) and methods using these have been proposed and put into practical use. All grout materials are required to have various performances such as strength after solidification, ease of gel time adjustment, permeability to the ground, and influence on the environment.
At present, the most frequently used is a grout material mainly composed of water glass. Although this type of grout material has a characteristic of excellent permeability, it has been pointed out that there is a disadvantage that the stability of the consolidation strength is inferior. That is, in most of the water glass grout materials, elution of alkali components and silicic acid components into groundwater is observed even after consolidation, and the consolidation strength decreases with time. For this reason, it is generally used as a short-term temporary ground injection and consolidation agent, and is not suitable for long-term temporary or permanent ground improvement.
In addition, for water glass grout materials, a method has been proposed in which a thickening agent is dissolved in water glass grout material to form an aqueous solution in which the injection material has viscosity as a method of solidifying sand ground with a lot of groundwater. ing. In this method, since the injected liquid is difficult to dilute with groundwater, it is said that the liquefaction phenomenon can be prevented (see, for example, Patent Document 4).
一方、水ガラス系グラウト材の欠点を改善するものとして、セメントを中心とする懸濁型グラウト材が提案されてきた。これらのグラウト材は固結体の強度は優れている。しかし、汎用セメントはその一次粒子径が比較的大きいため地盤への浸透性が劣ると言う欠点がある。近年では超微粒子セメントを用いる方法が提案されているが、当該微粒子セメントの生産性が劣り少量しか生産されておらず、価格も高価であるという問題がある。
水ガラスやシリカ系のグラウト材よりも強度に富むとされるグラウト材として、高炉スラグを主剤としたグラウト材が提案されてきた(例えば、特許文献1、特許文献2及び特許文献3参照)。これらのグラウト材では比較的強固な固結体が得られている。しかし、スラグ系懸濁型グラウト材は、注入液が調製後から粘度の上昇がみられ、注入作業中浸透性が低下することが多く、平均粒径0.075〜0.25mm程度の細砂地盤への浸透注入ができないことがしばしばであった。
したがって、注入液が低粘度で、安定であり、土壌への浸透性に優れ、高強度でしかも耐久性を有する懸濁型グラウト材が要請されている。
本発明者等は、懸濁型グラウト材の注入液の増粘現象及び浸透性を改善する、懸濁型グラウト材注入液の調製法を先に提案した(特願2003−332621)。
On the other hand, a suspension-type grout material centered on cement has been proposed as a means for improving the drawbacks of water glass grout materials. These grout materials have excellent strength of the consolidated body. However, the general-purpose cement has a disadvantage that its primary particle diameter is relatively large, so that the permeability to the ground is inferior. In recent years, a method using ultrafine cement has been proposed, but there is a problem that the productivity of the fine cement is inferior and only a small amount is produced, and the price is also expensive.
As a grout material which is said to be stronger than water glass or silica-based grout material, a grout material mainly composed of blast furnace slag has been proposed (see, for example, Patent Document 1, Patent Document 2 and Patent Document 3). With these grout materials, a relatively strong consolidated body is obtained. However, the slag suspension type grout material has an increase in viscosity after the preparation of the injection solution, and the permeability often decreases during the injection operation, and fine sand having an average particle size of about 0.075 to 0.25 mm. Often it was not possible to infuse into the ground.
Therefore, there is a demand for a suspension type grout material having a low viscosity, stable viscosity, excellent permeability to soil, high strength and durability.
The present inventors previously proposed a method for preparing a suspension type grout material injection solution that improves the thickening phenomenon and permeability of the suspension type grout material injection solution (Japanese Patent Application No. 2003-332621).
この出願の発明に関連する先行技術文献情報としては次のものがある。
本発明の課題は、懸濁型グラウト材が注入液調製後から粘度上昇し、土壌への浸透性が阻害される現象を改善し、注入液が低粘度で沈降分離せずに安定であり、貯蔵安定性に優れて、シルト質土の含有率が8%程度と比較的高く、粒径分布の広い土質の地盤への浸透性が優れ、地盤中で分離抵抗性に優れ、地下水に対する優れた抵抗性を有し、地盤中で均一な固形体を形成し、固化強度の優れた懸濁型グラウト材を提供することである。 The problem of the present invention is that the suspension type grout material increases in viscosity after the preparation of the injection solution, improves the phenomenon that the permeability to the soil is hindered, the injection solution is low in viscosity and stable without settling, Excellent storage stability, with a relatively high silty soil content of about 8%, excellent permeability to soil with a wide particle size distribution, excellent separation resistance in the ground, and excellent groundwater resistance It is to provide a suspension type grout material having resistance, forming a uniform solid body in the ground, and having excellent solidification strength.
本発明者らは、これらの課題を解決するため鋭意検討し、水に溶解又は分散して粘性を与える高分子物質を含有する懸濁型グラウト材により、課題を解決できることを見出し、本発明を完成した。
すなわち、本発明は、
1.懸濁型地盤改良材1m3あたり、次の量
(a)微粒子水砕スラグ 40〜500kg、
(b)アルカリ刺激剤 10〜100kg、
(c)減水剤 0.1〜20kg、
(d)水に溶解又は分散して粘性を与える、前記減水剤(c)ではない高分子物質 0.2〜5.0kg
(e)固結性改良剤 0〜100kg、及び
(f)残部が水
を含有する懸濁型地盤改良材を調製するに際し、微粒子水砕スラグ(a)をアルカリ刺激剤(b)の無添加又は添加の状態で、アルカリ刺激剤(b)無添加の場合は該スラグに対して、またアルカリ刺激剤(b)添加の場合は該スラグとアルカリ刺激剤との合計量に対して、0.3〜1.0倍量の水と、減水剤(c)、及び水に溶解又は分散して粘性を与える高分子物質(d)の存在下に混練して懸濁液を調製し、次いで得られた懸濁液に、必要な(b)、(e)及び(f)成分を加えることを特徴とする懸濁型地盤改良材の製造方法、
2.アルカリ刺激剤(b)が、難溶型アルカリ刺激剤であり、微粒子水砕スラグを難溶型アルカリ刺激剤添加の状態で混練することを特徴とする1項記載の懸濁型地盤改良材の製造方法、
3.アルカリ刺激剤(b)が、溶解型アルカリ刺激剤であり、微粒子水砕スラグを溶解型アルカリ刺激剤添加の状態で混練することを特徴とする1項記載の懸濁型地盤改良材の製造方法、
4.アルカリ刺激剤(b)が、溶解型アルカリ刺激剤であり、微粒子水砕スラグを溶解型アルカリ刺激剤無添加の状態で混錬し、得られた懸濁液に溶解型アルカリ刺激剤を添加することを特徴とする1項記載の懸濁型地盤改良材の製造方法、
5.微粒子水砕スラグ(a)が、ブレーン値7,000cm2/g以上である1〜4項記載の懸濁型地盤改良材の製造方法、
6.微粒子水砕スラグ(a)が、ブレーン値8,000〜12,000cm2/gの範囲である5項記載の懸濁型地盤改良材の製造方法、
である。
The present inventors have intensively studied to solve these problems, and found that the problem can be solved by a suspension type grout material containing a polymer substance that gives viscosity by dissolving or dispersing in water. completed.
That is, the present invention is,
1. The following amount per 1 m 3 of suspension type ground improvement material: (a) 40 to 500 kg of granulated granulated slag,
(B) 10-100 kg of alkali stimulant,
(C) 0.1-20 kg of water reducing agent ,
(D) 0.2 to 5.0 kg of a high molecular weight material that is not the water reducing agent (c) and that gives viscosity by dissolving or dispersing in water
(E) Solidification improver 0-100 kg, and (f) balance is water
In the preparation of a suspension-type ground improvement material containing slag, the granulated granulated slag (a) is added with or without the addition of the alkali stimulant (b), and the slag is added when the alkali stimulant (b) is not added. In addition, in the case of adding an alkali stimulant (b), 0.3 to 1.0 times as much water, a water reducing agent (c), and water with respect to the total amount of the slag and the alkali stimulant A suspension is prepared by kneading in the presence of the polymer substance (d) that is dissolved or dispersed in the mixture to give viscosity, and then the necessary suspensions (b), (e), and (f ) A method for producing a suspension-type ground improvement material characterized by adding an ingredient,
2. 2. The suspension-type ground improvement material according to claim 1, wherein the alkali stimulant (b) is a hardly soluble alkali stimulant, and finely pulverized granulated slag is kneaded with the hardly soluble alkali stimulant added. Production method,
3. 2. The method for producing a suspension-type ground improvement material according to claim 1, wherein the alkaline stimulant (b) is a dissolved alkaline stimulant, and finely pulverized granulated slag is kneaded with the dissolved alkaline stimulant added. ,
4). Alkali stimulant (b) is a dissolved alkaline stimulant, kneaded fine particle granulated slag without adding the soluble alkaline stimulant, and the dissolved alkaline stimulant is added to the resulting suspension. A method for producing a suspension-type ground improvement material according to claim 1 ,
5. The method for producing a suspension-type ground improvement material according to 1-4, wherein the finely divided granulated slag (a) has a brain value of 7,000 cm 2 / g or more,
6). The method for producing a suspension-type ground improvement material according to claim 5 , wherein the finely divided granulated slag (a) has a brain value in the range of 8,000 to 12,000 cm 2 / g,
It is.
本発明の懸濁型グラウト材は、注入液自体、その粘度が低く安定性に優れ、注入液中で微粒子水砕スラグ又は微粒子水砕スラグ及び難溶型アルカリ刺激剤の沈降分離がなく、地盤中への注入後も液分離がない。したがって、細かな粒径のシルト質土の含有率が高く、粒度分布の広い土質の地盤への浸透性に優れ、かつゲル化までの液粘性が低く安定であり、またゲル化後の固結体強度がセメント並みの高強度を発現する。 The suspension type grout material of the present invention has an injection solution itself, its viscosity is low and excellent in stability, and there is no sedimentation separation of finely divided granulated slag or finely divided granulated slag and hardly soluble alkaline stimulant in the injected solution There is no liquid separation after injection. Therefore, the content of silty soil with a fine particle size is high, it has excellent permeability to soil soil with a wide particle size distribution, and the liquid viscosity until gelation is low and stable. Body strength is as high as cement.
本発明の懸濁型地盤改良材は、水、微粒子水砕スラグ、アルカリ刺激剤、減水剤、水に溶解又は分散して粘性を与える高分子物質、及び必要により固結性改良剤を含有してなる懸濁型グラウト材である。
本発明の懸濁型地盤改良材は、粒径0.075mm未満の土、いわゆる、シルト質土の含有率が高い、粒度分布の広い土質である地盤への適用性に優れた懸濁型地盤改良材である。
本発明の懸濁型地盤改良材の特徴は、水に溶解又は分散して粘性を与える高分子物質を含有し、次ぎの態様を含むものである。
(1)微粒子水砕スラグ、難溶型アルカリ刺激剤を、水に溶解又は分散して粘性を与える高分子物質及び減水剤の存在下に水中で混練して得られる懸濁液に、残部の水と固結性改良剤を加えて調製される懸濁型地盤改良材、
(2)微粒子水砕スラグを、水に溶解又は分散して粘性を与える高分子物質及び減水剤の存在下に水中で混練して得られる懸濁液に、残部の水、溶解型アルカリ刺激剤及び必要により固結性改良剤を加えて調製される懸濁型地盤改良材、
(3)微粒子水砕スラグを、溶解型アルカリ刺激剤とともに減水剤の存在下に水中で混練して得られる懸濁液に、水に溶解又は分散して粘性を与える高分子物質を加え、さらに混練し、残部の水及び必要により固結性改良剤を加えて調製される懸濁型地盤改良材であり、いずれにおいても前記のような特有の優れた土壌改善効果を発揮する。
特に、(1)〜(3)において、水で混練して懸濁液を調製するに際して、使用する水の量を少なくし、高濃度で混練することにより一段と優れた効果を得ることができる。
The suspension-type ground improvement material of the present invention contains water, finely divided granulated slag, an alkali stimulant, a water reducing agent , a polymer substance that dissolves or disperses in water and gives viscosity, and if necessary, a caking improvement agent. It is a suspension type grout material.
The suspension-type ground improvement material of the present invention is a suspension-type ground excellent in applicability to soil having a particle size of less than 0.075 mm, that is, a soil having a high content of silty soil and having a wide particle size distribution. It is an improved material.
The feature of the suspension type ground improvement material of the present invention is that it contains a polymer substance that gives viscosity by being dissolved or dispersed in water, and includes the following aspects.
(1) In the suspension obtained by kneading finely ground granulated slag, sparingly soluble alkaline stimulant in water in the presence of a polymer substance that gives viscosity by dissolving or dispersing in water and a water reducing agent , Suspension type ground improvement material prepared by adding water and caking improver,
(2) The remaining water and dissolved alkaline stimulant are added to a suspension obtained by kneading finely ground granulated slag in water in the presence of a polymer substance that gives viscosity by dissolving or dispersing in water and a water reducing agent. And, if necessary, a suspension-type ground improvement material prepared by adding a caking improver,
(3) To a suspension obtained by kneading finely divided granulated slag with water in the presence of a water- reducing agent together with a dissolving alkaline stimulant, a polymer substance that gives viscosity by dissolving or dispersing in water is added, and It is a suspension-type ground improvement material that is kneaded and prepared by adding the balance of water and, if necessary, a caking improver, and in any case, exhibits an excellent soil improvement effect as described above.
In particular, in (1) to (3), when preparing a suspension by kneading with water, a more excellent effect can be obtained by reducing the amount of water used and kneading at a high concentration.
以下、本発明をさらに詳細に説明する。
本発明の懸濁型地盤改良材は、懸濁型地盤改良材1m3あたり、
(a)微粒子水砕スラグ 40〜500kg、
好ましくは、50〜300kg、
(b)アルカリ刺激剤 10〜100kg、
好ましくは、10〜80kg、
(c)減水剤 0.1〜20kg、
好ましくは、0.1〜8kg、
(d)水に溶解又は分散して粘性を与える、前記減水剤(c)ではない高分子物質 0.2〜5.0kg、
好ましくは、0.5〜3.0kg、
(e)固結性改良剤 0〜100kg、
好ましくは、5〜60kg、
及び
(f)残部が水
を含有してなる。
Hereinafter, the present invention will be described in more detail.
Suspension type soil improvement material according to the present invention, suspension-type soil improvement material 1 m 3 per
(A) Fine granulated slag 40 to 500 kg,
Preferably, 50 to 300 kg,
(B) 10-100 kg of alkali stimulant,
Preferably, 10-80 kg,
(C) 0.1-20 kg of water reducing agent ,
Preferably, 0.1-8 kg,
(D) 0.2 to 5.0 kg of a polymer substance that is not the water reducing agent (c) and is dissolved or dispersed in water to give viscosity;
Preferably, 0.5 to 3.0 kg,
(E) Solidification improver 0-100 kg,
Preferably, 5-60 kg,
And (f) the balance is water
It contains.
土壌改良にグラウト材として用いられる水砕スラグとしては、例えば、鉄鋼を生産する際に生成する鉄鋼スラグの中、高炉スラグの熔融スラグに加圧水の噴射又は熔融スラグを水槽に注入して、急冷、粒状化して得られる水砕スラグが知られ、粒子の気孔が少なく緻密な硬質水砕スラグ、気孔が多く軽い軟質スラグがある。これらは、溶融スラグ温度、水量、水圧などの製造時条件を操作して作り分けられている。
本発明の方法で用いられる水砕スラグは、微粒子水砕スラグ(a)である。水砕スラグは、その比表面積を、セメントその他の粉体の比表面積を測定する方法である、粉体圧縮層を空気が透過する際の抵抗を評価する。その値は真の値と異なり、ブレーン値と呼ばれる比較値で表わされている。
本発明で好ましく使用される微粒子水砕スラグは、このブレーン値が7,000cm2/g以上であり、更に好ましくは8,000〜12,000cm2/gの範囲である。
本発明の懸濁型地盤改良材において、微粒子水砕スラグの量は、懸濁型地盤改良材1m3あたり、40〜500kg、好ましくは50〜300kgである。
As granulated slag used as a grout material for soil improvement, for example, in steel slag produced when producing steel, injection of pressurized water or molten slag into molten slag of blast furnace slag into a water tank, rapid cooling, Granulated granulated slag is known, and there are fine hard granulated slag with few pores of particles and soft slag with many pores and light. These are made by manipulating manufacturing conditions such as molten slag temperature, water volume, and water pressure.
The granulated slag used in the method of the present invention is a particulate granulated slag (a). The granulated slag is evaluated by the resistance when air permeates through the powder compression layer, which is a method for measuring the specific surface area of the powder and other powders. The value is different from the true value and is represented by a comparison value called a brain value.
The finely divided granulated slag preferably used in the present invention has a Blaine value of 7,000 cm 2 / g or more, and more preferably in the range of 8,000 to 12,000 cm 2 / g.
In the suspension type ground improvement material of the present invention, the amount of the finely divided granulated slag is 40 to 500 kg, preferably 50 to 300 kg per 1 m 3 of the suspension type ground improvement material.
水砕スラグは、それ自体、硬化性を示さず、アルカリの存在下に固結する硬化メカニズムにより硬化性を発現させる。
本発明の懸濁型地盤改良材で使用するアルカリ刺激剤(b)は、水砕スラグに潜在している硬化性を発現させるアルカリ刺激剤であればいずれも使用できる。
アルカリ刺激剤としては、溶解型アルカリ刺激剤及び難溶型アルカリ刺激剤がある。
溶解型アルカリ刺激剤としては、(1)水酸化ナトリウム及び/又は水酸化カリウム溶液、(2)炭酸ナトリウム及び/又は炭酸カリウム又は炭酸ナトリウムカリウム、(3)固形かんすい又は液状かんすい、(4)アルミン酸ナトリウム及び/又はアルミン酸カリウム、(5)アルカリ水ガラス溶液、(6)pHが7.5〜12にあるコロイダルシリカ溶液等が挙げられる。より好ましい溶解型アルカリ刺激剤としては(1)〜(3)のいずれか1種とすることが良く、特に好ましくは(2)又は(3)の1種である。
(1)の溶解型アルカリ刺激剤としては特に制約するものでは無いが、5重量%以下の水酸化ナトリウム及び/又は5重量%以下の水酸化カリウム溶液を充てることが良い。またその混合物であっても良い。
また(2)の溶解型アルカリ刺激剤では固体状の炭酸ナトリウム、同炭酸カリウム、同炭酸ナトリウムカリウム、飽和濃度以下の炭酸ナトリウム、同炭酸カリウム、同炭酸ナトリウムカリウムを充てて良く、1種又は2種以上の混合物であっても良い。
(3)固形かんすい又は液状かんすいとは、前記(2)と第2及び/又は第3燐酸アルカリ金属塩類を含有してなる組成物である。
(4)アルミン酸ナトリウム及び/又はアルミン酸カリウムとしては特に制約するものでは無いが、固体アルミン酸ナトリウム、固体アルミン酸カリウム、30重量%以下のアルミン酸ナトリウム溶液、30重量%以下のアルミン酸カリウム溶液等を適宜充てることが良い。またその混合物であっても良い。
(5)アルカリ水ガラス溶液としては特に制約するものでは無いが、水溶性の珪酸ナトリウム及び/又は珪酸カリウムであってよい。特に日本工業規格製品である1〜4号アルカリ水ガラス溶液、オルト珪酸ナトリウム溶液、オルト珪酸カリウム溶液が挙げられ、1〜3号珪酸ナトリウム溶液が最も好ましい例である。
(6)pHが7.5〜12にあるコロイダルシリカ溶液としては特に制約するものでは無いが、水溶性の珪酸ナトリウム及び/又は珪酸カリウムを出発原料としナトリウムイオンを除去する形で脱水縮合反応させて高分子量化してなる、300nm以下のコロイダルシリカをおよそ40重量%以下の濃度で含有してなる半懸濁溶液とすることが良い。
The granulated slag itself does not exhibit curability, and exhibits curability by a curing mechanism that solidifies in the presence of alkali.
Any alkaline stimulant (b) used in the suspension-type ground improvement material of the present invention can be used as long as it exhibits the curability latent in the granulated slag.
Examples of the alkaline stimulant include a soluble alkaline stimulant and a hardly soluble alkaline stimulant.
Dissolving alkaline stimulants include (1) sodium hydroxide and / or potassium hydroxide solution, (2) sodium carbonate and / or potassium carbonate or potassium carbonate, (3) solid or liquid phosphate, (4) aluminum Examples thereof include sodium acid and / or potassium aluminate, (5) alkaline water glass solution, and (6) colloidal silica solution having a pH of 7.5 to 12. A more preferable dissolved alkali stimulator is any one of (1) to (3), particularly preferably (2) or (3).
Although it does not restrict | limit especially as a soluble alkaline stimulant of (1), It is good to fill 5 weight% or less sodium hydroxide and / or 5 weight% or less potassium hydroxide solution. Moreover, the mixture may be sufficient.
Further, the dissolved alkaline stimulant (2) may be filled with solid sodium carbonate, potassium carbonate, sodium potassium carbonate, sodium carbonate, potassium carbonate, sodium potassium carbonate having a saturated concentration or less. It may be a mixture of seeds or more.
(3) The solid or liquid rinse is a composition comprising the above (2) and the second and / or third alkali metal phosphate.
(4) Sodium aluminate and / or potassium aluminate is not particularly limited, but is solid sodium aluminate, solid potassium aluminate, 30 wt% or less sodium aluminate solution, 30 wt% or less potassium aluminate It is preferable to apply a solution or the like as appropriate. Moreover, the mixture may be sufficient.
(5) The alkali water glass solution is not particularly limited, but may be water-soluble sodium silicate and / or potassium silicate. In particular, No. 1-4 alkaline water glass solution, sodium orthosilicate solution, and potassium orthosilicate solution, which are Japanese Industrial Standard products, can be mentioned, and No. 1-3 sodium silicate solution is the most preferred example.
(6) The colloidal silica solution having a pH of 7.5 to 12 is not particularly limited, but a dehydration condensation reaction is performed in a form that removes sodium ions using water-soluble sodium silicate and / or potassium silicate as a starting material. A semi-suspended solution containing about 300% by weight or less of colloidal silica having a molecular weight of 300 nm or less is preferable.
また、難溶型アルカリ刺激剤としては、微粒子状の消石灰及び/又は微粒子状の生石灰が挙げられる。
微粒子状の消石灰としては、特に制約は無く、好ましくは、粒径加積曲線上に於ける95重量%粒子径(d95)が50μm以下である。
また、微粒子状の生石灰としては、特に制約は無く、好ましくは、粒径加積曲線上に於ける95重量%粒子径(d95)が50μm以下である。消石灰及び/又は微粒子状の生石灰は、水砕スラグの持つ潜在水硬性を顕在化させる物質として、ならびに地盤中で急速かつ高強度な固結体を与える作用効果が良好である。
消石灰は、その製造方法や粉砕方法等によって特に制約を受ける事はなく、前記要件に合うものを使用することができる。
また、消石灰としては、その純度にも特に制約は無く、例えば、数十重量%以内で生石灰を含有するものであってもよい。生石灰は水と合うと直ちに消石灰に誘導されるので、生石灰が不純物として包含されるものであっても支障はない。
本発明の懸濁型地盤改良材において、アルカリ刺激剤の量は、懸濁型地盤改良材1m3あたり、10〜100kg、好ましくは10〜80kgである。
As the flame soluble alkaline stimulating agent include particulate slaked lime and / or particulate raw lime.
The fine slaked lime is not particularly limited and preferably has a 95% by weight particle size (d 95 ) of 50 μm or less on the particle size accumulation curve.
As the particulate quicklime, not particularly limited, preferably, the particle径加in 95 wt% particle diameter on the integration curve (d 95) is 50μm or less. Slaked lime and / or fine-grained quicklime is good as a substance that reveals the latent hydraulic properties of granulated slag, and has a good effect of giving a rapid and high-strength consolidated body in the ground.
The slaked lime is not particularly restricted by its production method, pulverization method, and the like, and those meeting the above requirements can be used.
Moreover, as slaked lime, there is no restriction | limiting in particular in the purity, For example, quick lime may be contained within several tens weight%. Quick lime is immediately induced into slaked lime when it comes in contact with water, so there is no problem even if quick lime is included as an impurity.
In the suspension type ground improvement material of the present invention, the amount of the alkali stimulant is 10 to 100 kg, preferably 10 to 80 kg per 1 m 3 of the suspension type ground improvement material.
さらに、本発明の懸濁型地盤改良材の構成に必須な成分として減水剤(b)があげられる。減水剤とは、いわゆるコンクリート混和材料で減水剤と称され、セメント粒子を個々に分散させるものであり、本発明においても、スラグ粒子の界面に吸着しスラグ粒子を分散させる効果を奏するものである(以下分散剤ということがある)。例えば、ナフタレンスルフォン酸ホルムアルデヒド縮合誘導体やそれらのアルカリ塩類等のナフタレン系減水剤、リグニンスルフォン酸ホルムアルデヒド縮合誘導体等やそれらのアルカリ塩類等のリグニン系減水剤、水溶性ポリカルボン酸化合物やそれらのアルカリ塩類等のポリカルボン酸系減水剤、水溶性メラミンスルファミン酸ホルムアルデヒド縮合物やそれらのアルカリ塩類等のメラミンスルファミン酸系減水剤、水溶性メラミンスルホン酸ホルムアルデヒド縮合物やそれらのアルカリ塩類等のメラミン系減水剤、水溶性アルキレングリコールモノアミン付加変性メラミンスルホン酸ホルムアルデヒド縮合物やそれらのアルカリ塩類等の変性メラミン系減水剤等が挙げられ、これらは1種又は2種以上を併用してもよい。
本発明において、好ましく用いられる減水剤は、オレフィン−マレイン酸共重合体の塩である。
本発明の懸濁型地盤改良材において、減水剤の量は、懸濁型地盤改良材1m3あたり、0.1〜20kg、好ましくは0.1〜8kgである。
Furthermore, a water reducing agent (b) is mention | raise | lifted as an essential component for the structure of the suspension type ground improvement material of this invention. The water reducing agent is a so-called concrete admixture and is called a water reducing agent, in which cement particles are individually dispersed. In the present invention, the water absorbing agent is adsorbed on the interface of the slag particles and has the effect of dispersing the slag particles. (Hereafter, it may be called a dispersing agent . ) For example, naphthalene sulfonate formaldehyde condensation derivatives and naphthalene water reducing agents such as alkali salts thereof, lignin water reducing agents such as lignin sulfonic acid formaldehyde condensation derivatives and alkali salts thereof, water-soluble polycarboxylic acid compounds and alkali salts thereof. Such as polycarboxylic acid-based water reducing agents, water-soluble melamine sulfamic acid formaldehyde condensates and their alkaline salts, melamine sulfamic acid-based water reducing agents, water-soluble melamine sulfonic acid formaldehyde condensates and their alkaline salts, melamine-based water reducing agents And water-soluble alkylene glycol monoamine addition-modified melamine sulfonic acid formaldehyde condensates and modified melamine water reducing agents such as alkali salts thereof, and the like, and these may be used alone or in combination of two or more.
In the present invention, the water reducing agent preferably used is an olefin-maleic acid copolymer salt.
In the suspension type ground improvement material of the present invention, the amount of the water reducing agent is 0.1 to 20 kg, preferably 0.1 to 8 kg, per 1 m 3 of the suspension type ground improvement material.
本発明において、水に溶解又は分散して粘性を与える高分子物質(d)とは、水に溶解又は懸濁して水溶液又は懸濁液そのものの粘度を向上させるものであり、多糖類又はその誘導体、天然ガム類あるいは水溶性の合成高分子物質が挙げられる。
これらの高分子物質は、本発明においては注入液の粘度を向上させることが殆どない範囲の量で使用するにも拘らず、注入液中でのスラグの沈降を著しく抑制し、注入液の安定性、及び地盤中への浸透性を向上させる。
多糖類又はその誘導体としては、メチルセルロース、カルボキシメチルセルロースナトリウム(CMC)、ヒドロキシエチルセルロース、澱粉グリコール酸ナトリウム、澱粉リン酸エステルナトリウム、アルギン酸ナトリウム、アルギン酸プロピレングリコールエステル、カゼインナトリウム等のアルカリ金属塩が挙げられ、
天然ガム類としては、アラビアゴム、アルギン酸、カゼイン、グアガム、グルテン、ローカストビーンガム、ダリントンガム等が挙げられ、
また、水溶性の有機合成高分子物質としては、ポリビニルアルコール、ポリアクリル酸ナトリウム等が挙げられる。
好ましくは、多糖類又はその誘導体であり、より好ましくは、メチルセルロース、又はヒドロキシエチルセルロースである。
本発明の懸濁型地盤改良材において、これらの高分子物質の量は、懸濁型地盤改良材1m3あたり、0.2〜5.0kg、好ましくは0.5〜3.0kgである。
In the present invention, the polymer substance (d) that gives viscosity by dissolving or dispersing in water is a substance that dissolves or suspends in water to improve the viscosity of an aqueous solution or suspension itself, and is a polysaccharide or a derivative thereof. And natural gums or water-soluble synthetic polymer substances.
Although these polymer substances are used in the present invention in an amount within a range that hardly improves the viscosity of the injected solution, the settling of the slag in the injected solution is remarkably suppressed, and the stability of the injected solution is improved. And the permeability to the ground.
Examples of polysaccharides or derivatives thereof include alkali metal salts such as methylcellulose, sodium carboxymethylcellulose (CMC), hydroxyethylcellulose, sodium starch glycolate, sodium phosphate phosphate, sodium alginate, propylene glycol ester alginate, sodium caseinate,
Examples of natural gums include gum arabic, alginic acid, casein, guar gum, gluten, locust bean gum, Darlington gum,
Examples of the water-soluble organic synthetic polymer substance include polyvinyl alcohol and sodium polyacrylate.
A polysaccharide or a derivative thereof is preferable, and methyl cellulose or hydroxyethyl cellulose is more preferable.
In the suspension type ground improvement material of the present invention, the amount of these polymer substances is 0.2 to 5.0 kg, preferably 0.5 to 3.0 kg, per 1 m 3 of the suspension type ground improvement material.
本発明で用いられる固結性改良剤(e)とは、通常、硬化剤と称されることもある添加助剤であり、本発明に係わる懸濁型地盤改良材の固結性を向上させる効果を付与させるために用いられる添加剤を言う。
このような添加剤としては、水溶性硫酸塩が用いられる。例えば、重硫酸塩、硫酸アルカリ金属塩、亜硫酸塩、重亜硫酸塩、過硫酸塩、硫酸マグネシウム、硫酸アルミニウム、チオ硫酸塩、みょうばんから選ばれた1種又は2種以上である。それらの無水物又は結晶水付加物のいずれかであって良い。なかでも、前記した水溶性硫酸塩等は水によく溶解し、溶解型硬化剤として取り扱うことができる。
硫酸アルカリ金属塩は安価に入手でき、また、過硫酸塩と併用することにより、固結体生成時特有の悪臭の発生を大幅に軽減できる上に、地盤固結速度を一段と向上させる効果が得られる。
The caking improver (e) used in the present invention is an additive aid that is sometimes referred to as a curing agent, and improves the caking property of the suspension type ground improvement material according to the present invention. The additive used in order to give an effect is said.
A water-soluble sulfate is used as such an additive. For example, one or more selected from bisulfate, alkali metal sulfate, sulfite, bisulfite, persulfate, magnesium sulfate, aluminum sulfate, thiosulfate, and alum. They may be either their anhydrides or crystal water adducts. Among these, the above-described water-soluble sulfates and the like dissolve well in water and can be handled as a dissolution type curing agent.
Alkali metal sulfates can be obtained at low cost, and when used in combination with persulfates, the generation of stinking peculiar to the formation of consolidated bodies can be greatly reduced, and the effect of further improving the ground consolidation rate can be obtained. It is done.
ここで、重硫酸塩としては、特に制約は無い。代表的な例としては、重硫酸ナトリウム、重硫酸カリウム、重硫酸リチウム、重硫酸アンモニウム又はそれらの無水物及び/又は結晶水付加物のいずれかであって良い。特に好ましい重硫酸塩としては、重硫酸ナトリウム及び/又は重硫酸カリウム、又はその無水物及び/又は結晶水付加物を用いることができる。
また、硫酸アルカリ金属塩としては、特に制約は無い。代表的な例としては、硫酸ナトリウム、硫酸ナトリウムカリウム、硫酸カリウム、重硫酸リチウム、硫酸ナトリウムリチウム、硫酸カリウムリチウム、硫酸アンモニウムなど。又はそれらの無水物及び/又は結晶水付加物であって良い。特に好ましい硫酸塩としては、硫酸ナトリウム及び/又は硫酸カリウムが挙げられ、その無水物及び/又は結晶水付加物を用いることができる。
Here, there is no restriction | limiting in particular as a bisulfate. Representative examples may be sodium bisulfate, potassium bisulfate, lithium bisulfate, ammonium bisulfate or their anhydrides and / or crystal water adducts. As a particularly preferred bisulfate, sodium bisulfate and / or potassium bisulfate, or an anhydride and / or a crystal water adduct thereof can be used.
Moreover, there is no restriction | limiting in particular as an alkali metal sulfate. Typical examples include sodium sulfate, potassium sodium sulfate, potassium sulfate, lithium bisulfate, lithium sodium sulfate, lithium potassium sulfate, and ammonium sulfate. Or their anhydrides and / or crystal water adducts. Particularly preferred sulfates include sodium sulfate and / or potassium sulfate, and anhydrides and / or crystal water adducts thereof can be used.
亜硫酸塩としては、特に制約は無い。代表的な例としては、亜硫酸ナトリウム、亜硫酸ナトリウムカリウム、亜硫酸カリウム、亜硫酸リチウム、亜硫酸ナトリウムリチウム、亜硫酸カリウムリチウム、又はそれらの無水物及び/又は結晶水付加物であって良い。特に好ましい亜硫酸塩としては、亜硫酸ナトリウム及び/又は亜硫酸カリウム又は亜硫酸ナトリウムカリウムが挙げられ、その無水物及び/又は結晶水付加物を用いることができる。
重亜硫酸塩としては、特に制約は無い。代表的な例としては、重亜硫酸ナトリウム、重亜硫酸カリウム、重亜硫酸リチウム、亜硫酸アンモニウムなど、又はそれらの無水物又は結晶水付加物のいずれかであって良い。特に好ましい重亜硫酸塩としては、重亜硫酸ナトリウム及び/又は重亜硫酸カリウムが挙げられ、その無水物及び/又は結晶水付加物を用いることができる。
There is no restriction | limiting in particular as a sulfite. Representative examples may be sodium sulfite, sodium potassium sulfite, potassium sulfite, lithium sulfite, lithium sodium sulfite, lithium potassium sulfite, or their anhydrides and / or crystal water adducts. Particularly preferred sulfites include sodium sulfite and / or potassium sulfite or potassium sodium sulfite, and anhydrides and / or crystal water adducts thereof can be used.
There is no restriction | limiting in particular as a bisulfite. Representative examples may be sodium bisulfite, potassium bisulfite, lithium bisulfite, ammonium sulfite, etc., or any of their anhydrides or crystal water adducts. Particularly preferred bisulfites include sodium bisulfite and / or potassium bisulfite, and anhydrides and / or crystal water adducts thereof can be used.
過硫酸塩としては、特に制約は無い。代表的な例としては、過硫酸ナトリウム、過硫酸カリウム、過硫酸ナトリウムカリウム、過硫酸アンモニウムなど、又はそれらの無水物及び/又は結晶水付加物であって良い。特に好ましい過硫酸塩としては、過硫酸ナトリウム及び/又は過硫酸カリウムが挙げられ、その無水物及び/又は結晶水付加物を用いる事が良い。
硫酸マグネシウムとしては無水物及び/又は結晶水付加物であって良い。硫酸アルミニウムとしては無水物及び/又は結晶水付加物であって良い。
チオ硫酸塩としては、特に制約は無い。代表的な例としては、チオ硫酸ナトリウム、チオ硫酸カリウム、チオ硫酸アンモニウムなど、又はそれらの無水物及び/又は結晶水付加物として良い。
みょうばんとしては、特に制約は無い。代表的な例としては、カリウムみょうばん、ナトリウムみょうばん、アンモニウムみょうばんなど、又は無水物及び/又は結晶水付加物であってもよい。
本発明の懸濁型地盤改良材において、固結性改良剤の量は、懸濁型地盤改良材1m3あたり、0〜100kg、好ましくは5〜60kgである。なお、本発明の懸濁型地盤改良材において、アルカリ刺激剤のみで十分に固結する処方が選択できる場合は、固結性改良剤を必ずしも添加する必要はない。
There is no restriction | limiting in particular as a persulfate. Representative examples may be sodium persulfate, potassium persulfate, potassium potassium persulfate, ammonium persulfate, etc., or their anhydrides and / or crystal water adducts. Particularly preferred persulfates include sodium persulfate and / or potassium persulfate, and the anhydrides and / or crystal water adducts thereof may be used.
Magnesium sulfate may be an anhydride and / or a crystal water adduct. Aluminum sulfate may be an anhydride and / or a crystal water adduct.
There is no restriction | limiting in particular as thiosulfate. As typical examples, sodium thiosulfate, potassium thiosulfate, ammonium thiosulfate and the like, or anhydrides and / or crystal water adducts thereof may be used.
As alum, there are no particular restrictions. Representative examples may be potassium alum, sodium alum, ammonium alum, etc., or an anhydride and / or crystal water adduct .
In the suspension type ground improvement material of the present invention, the amount of the caking property improving agent is 0 to 100 kg, preferably 5 to 60 kg per 1 m 3 of the suspension type ground improvement material. In addition, in the suspension type ground improvement material of this invention, when the prescription which fully solidifies only with an alkali stimulant can be selected, it is not necessary to add a solidification improver.
以下、本発明の懸濁型地盤改良材の製造方法を説明する。
本発明の懸濁型地盤改良材の製造方法は、
(1)微粒子水砕スラグ(a)、難溶型アルカリ刺激剤(b)及び水に溶解又は分散して粘性を与える高分子物質(d)を分散剤(c)の存在下に水中で混練して懸濁液を調製し、次いで得られた懸濁液に、固結性改良剤(e)及び残部の水(f)を加えて製造する方法、
(2)微粒子水砕スラグ(a)及び水に溶解又は分散して粘性を与える高分子物質(d)を分散剤(c)の存在下に水中で混練して懸濁液を調製し、次いで得られた懸濁液に、溶解型アルカリ刺激剤(b)、固結性改良剤(e)及び残部の水(f)を加えて製造する方法、
(3)微粒子水砕スラグ(a)、アルカリ刺激剤(b)を分散剤(c)の存在下に水中で混練して懸濁液を調製し、次いで得られた懸濁液に、水に溶解又は分散して粘性を与える高分子物質(d)、固結性改良剤(e)及び残部の水(f)を加えて更に混練して製造する方法等が挙げられる。
これらの方法において、好ましい実施の態様としては、微粒子水砕スラグを該スラグに対して、又は該スラグとアルカリ刺激剤との合計量に対して、0.3〜1.0倍量の水中で、アルカリ刺激剤(b)の添加又は無添加の状態で、水に溶解又は分散して粘性を与える高分子物質(d)及び分散剤(c)の存在下に、混練して懸濁液を調製し、次いで得られた懸濁液に、必要な(b)、(e)及び(f)成分を加えて調製する方法が挙げられる。なお、固結性改良剤(e)は、必要により添加する。
Hereinafter, the manufacturing method of the suspension type ground improvement material of this invention is demonstrated.
The method for producing the suspension-type ground improvement material of the present invention,
(1) Finely pulverized granulated slag (a), sparingly soluble alkaline stimulant (b), and polymer substance (d) that dissolves or disperses in water to give viscosity is kneaded in water in the presence of dispersant (c). A suspension, and then adding the caking improver (e) and the remaining water (f) to the resulting suspension,
(2) A finely ground granulated slag (a) and a polymer substance (d) that is dissolved or dispersed in water to give viscosity are kneaded in water in the presence of a dispersant (c) to prepare a suspension; A method for producing a suspension by adding a soluble alkaline stimulant (b), a caking improver (e) and the remaining water (f),
(3) A finely divided granulated slag (a) and an alkaline stimulant (b) are kneaded in water in the presence of a dispersant (c) to prepare a suspension, and then the resulting suspension is poured into water. Examples thereof include a method in which a polymer substance (d) that gives viscosity by dissolution or dispersion, a caking improver (e), and the remaining water (f) are added and further kneaded for production.
In these methods, as a preferred embodiment, finely ground granulated slag is contained in 0.3 to 1.0 times the amount of water with respect to the slag or the total amount of the slag and the alkali stimulant. In the presence or absence of the alkali stimulant (b), the suspension is kneaded in the presence of the polymer substance (d) and the dispersant (c) that are dissolved or dispersed in water to give viscosity. A method of preparing and then adding the necessary components (b), (e) and (f) to the resulting suspension is mentioned. The caking property improver (e) is added as necessary.
これらの方法において、上記の微粒子水砕スラグ、アルカリ刺激剤、分散剤、水に溶解又は分散して粘性を与える高分子物質、及び固結性改良剤、並びに水の量は、該組成物1m3あたり、次の通りである。
すなわち、
(a)微粒子水砕スラグ 40〜500kg、
好ましくは、50〜300kg、
(b)アルカリ刺激剤 10〜100kg、
好ましくは、10〜80kg、
(c)分散剤 0.1〜20kg、
好ましくは、0.1〜8kg、
(d)水に溶解又は分散して粘性を与える高分子物質 0.2〜5.0kg、
好ましくは、0.5〜3.0kg、
(e)固結性改良剤 0〜100kg、
好ましくは、5〜60kg、
及び
(f)残部が水
である。
In these methods, the above-mentioned finely divided granulated slag, alkali stimulant, dispersant, polymer substance that gives viscosity by being dissolved or dispersed in water, and a caking property improver, and the amount of water are as follows. It is as follows per three .
That is,
(A) Fine granulated slag 40 to 500 kg,
Preferably, 50 to 300 kg,
(B) 10-100 kg of alkali stimulant,
Preferably, 10-80 kg,
(C) 0.1-20 kg of dispersant,
Preferably, 0.1-8 kg,
(D) 0.2 to 5.0 kg of a polymer substance that dissolves or disperses in water and gives viscosity.
Preferably, 0.5 to 3.0 kg,
(E) Solidification improver 0-100 kg,
Preferably, 5-60 kg,
And (f) the balance is water
It is.
また、これらの方法において、アルカリ刺激剤(b)として難溶型アルカリ刺激剤を用いるときは、微粒子水砕スラグを難溶型アルカリ刺激剤添加の状態で、微粒子水砕スラグ(a)及び難溶型アルカリ刺激剤の合計量に対して0.3〜2.0倍量、好ましくは0.3〜1.0倍量の水中で、水に溶解又は分散して粘性を与える高分子物質(d)及び分散剤(c)の存在下に混練して懸濁液を調製し、次いで得られた懸濁液に、必要により固結性改良剤(e)及び残部の水を加えて懸濁型地盤改良材を調製する。
また、アルカリ刺激剤として溶解型アルカリ刺激剤を用いるときは、微粒子水砕スラグを溶解型アルカリ刺激剤添加の状態で0.3〜2.0倍量、好ましくは0.3〜1.0倍量の水中で、水に溶解又は分散して粘性を与える高分子物質(d)及び分散剤(c)の存在下に混練して懸濁液を調製し、次いで得られた懸濁液に必要により固結性改良剤(e)及び残部の水を加えて懸濁型地盤改良材を調製する。又は微粒子水砕スラグを溶解型アルカリ刺激剤無添加の状態で、該スラグに対して0.3〜2.0倍量、好ましくは0.3〜1.0倍量の水中で水に溶解又は分散して粘性を与える高分子物質(d)及び分散剤(c)の存在下に混練して懸濁液を調製し、次いで得られた懸濁液に必要により固結性改良剤(e)及び溶解型アルカリ刺激剤(b)を残部の水を加えて懸濁型地盤改良材を調製する。
In these methods, when a hardly soluble alkaline stimulant is used as the alkali stimulant (b), the finely divided granulated slag is added with the hardly soluble alkaline stimulant added to the finely granulated slag (a). A polymer substance that gives viscosity by being dissolved or dispersed in water in 0.3 to 2.0 times, preferably 0.3 to 1.0 times the amount of the total amount of the dissolved alkaline stimulant. A suspension is prepared by kneading in the presence of d) and the dispersant (c), and then the suspension is obtained by adding a caking improver (e) and the remaining water as necessary. Prepare the mold ground improvement material.
In addition, when a soluble alkaline stimulant is used as the alkaline stimulant, the amount of finely ground granulated slag is 0.3 to 2.0 times, preferably 0.3 to 1.0 times with the dissolved alkaline stimulant added. In a quantity of water, a suspension is prepared by kneading in the presence of a polymer substance (d) and a dispersing agent (c) that are dissolved or dispersed in water to give viscosity, and then necessary for the resulting suspension. To add a caking improver (e) and the remaining water to prepare a suspension-type ground improvement material. Alternatively, finely ground granulated slag is dissolved in water in an amount of 0.3 to 2.0 times, preferably 0.3 to 1.0 times the amount of the slag without adding a dissolving alkaline stimulant, or A suspension is prepared by kneading in the presence of the polymer substance (d) and the dispersing agent (c) that give viscosity by dispersion, and then the caking improver (e) if necessary in the resulting suspension. And the remaining water is added to the dissolution type alkaline stimulant (b) to prepare a suspension type ground improvement material.
上記の方法で懸濁型地盤改良材を調製するに当たり、先ず、微粒子水砕スラグに対して、又は微粒子水砕スラグ及びアルカリ刺激剤の合計量に対し、水の量が0.3〜1倍量である高濃度で、水に溶解又は分散して粘性を与える高分子物質、分散剤の存在下に混練して懸濁液を調製するのが好ましい。
このような高濃度の水中で混練して得られる懸濁液に、残部の水、及び必要により固結性改良剤及び/又はアルカリ刺激剤を加えて懸濁型地盤改良材として上記の組成物を得る。
具体的には、好ましい1例を挙げれば、水砕スラグ200kg及び難溶型アルカリ刺激剤50kgの合計量250kgに対して、75〜250kgの水を用いて水に溶解又は分散して粘性を与える高分子物質2kg、分散剤5kgの存在下に混練する。
これらの材料を混練する処方には特に制限はなく、混練の効果を十分に達成できる混練機器、例えば、モルタルミキサーなどで、十分な時間混練する。懸濁液は、かかる混練によりペーストの状態になり、この状態に達するまで十分に練り合わせる。
得られる懸濁液にさらに残部の水及び固結性改良剤40kgを加えて、本発明の懸濁型地盤改良材を得る。
かくして得られる懸濁型地盤改良材は、水に溶解又は分散して粘性を与える高分子物質を用いずに、水砕スラグ及び難溶型アルカリ刺激剤の合計量250kgに対して、水の量が250kgを越える量で分散剤の存在下に混合して調製した混合液に、残部の水及び固結性改良剤40kgを加えて調製した組成物、すなわち、組成物1m3あたり、水砕スラグ200kg、アルカリ刺激剤50kg、分散剤5kg及び固結性改良剤40kg及び残部が水である組成物に比べ、地盤に対する浸透性及び安定性に優れ、懸濁型地盤改良材として優れた効果が得られる。
In preparing the suspension-type ground improvement material by the above method, first, the amount of water is 0.3 to 1 times the amount of the finely divided granulated slag or the total amount of the finely divided granulated slag and the alkali stimulant. It is preferable to prepare a suspension by kneading in the presence of a high-molecular substance that dissolves or disperses in water and gives viscosity by a high concentration and a dispersing agent.
To the suspension obtained by kneading in such high-concentration water, the remaining water, and if necessary, a caking improver and / or an alkali stimulant are added to form the above composition as a suspension-type ground improvement material. Get.
Specifically, to give a preferable example, for a total amount of 250 kg of granulated slag 200 kg and a hardly soluble alkali stimulator 50 kg, 75 to 250 kg of water is used to dissolve or disperse in water to give viscosity. Kneading in the presence of 2 kg of the polymer substance and 5 kg of the dispersant.
The formulation for kneading these materials is not particularly limited, and kneading is carried out for a sufficient time with a kneading apparatus that can sufficiently achieve the kneading effect, such as a mortar mixer. The suspension becomes a paste by such kneading and is sufficiently kneaded until this state is reached.
The remaining water and 40 kg of the caking improver are further added to the resulting suspension to obtain the suspension-type ground improvement material of the present invention.
The suspension-type ground improvement material obtained in this way is an amount of water with respect to a total amount of 250 kg of granulated slag and a hardly soluble alkaline stimulant, without using a polymer substance that dissolves or disperses in water and gives viscosity. Is a mixture prepared by mixing in the presence of a dispersant in an amount of more than 250 kg, and adding 40 kg of the remaining water and a caking improver, that is, granulated slag per 1 m 3 of the composition. Compared to 200 kg, alkali stimulant 50 kg, dispersant 5 kg, caking improver 40 kg and the balance being water, it has excellent permeability and stability to the ground, and has excellent effects as a suspension-type ground improvement material. It is done.
以下、本発明を実施例及び比較例により説明する。
実施例1
高炉水砕スラグ(スミットメント スーパー10、ブレーン値 10,000cm2/g;住金鉱化株式会社) 80g及びアルカリ刺激剤(消石灰;秩父石灰工業株式会社)20gの合計量(P1)に対して100mlの水(W)を用い、水に溶解又は分散して粘性を与える高分子物質(メチルセルロース:松本油脂(株)社製)0.4g、分散剤(オレフィン−マレイン酸共重合体塩:日本ゼオン)2.0gの存在下に攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で20℃、5分間激しく攪拌混練(一次混練)して、ペースト状の混練物を得た。得られたペーストにさらに固結性改良剤(硫酸ナトリウム)16g及び全量が400mlとなる量の水を加え注入液とした。
調製した注入液の一次元浸透距離及び安定性を下記の試験法で測定した。結果を表1に示す。
Hereinafter, the present invention will be described with reference to examples and comparative examples.
Example 1
Granulated blast furnace slag (Smitment Super 10, brain value 10,000 cm 2 / g; Sumikin Mineral Co., Ltd.) 80 ml and alkali stimulant (slaked lime; Chichibu Lime Industry Co., Ltd.) 20 g of total amount (P1) Water (W), 0.4 g of a polymer substance (methylcellulose: manufactured by Matsumoto Yushi Co., Ltd.) that gives viscosity by dissolving or dispersing in water, dispersant (olefin-maleic acid copolymer salt: Nippon Zeon) ) In the presence of 2.0 g, the mixture was vigorously stirred and kneaded (primary kneading) at 20 ° C. for 5 minutes with a propeller-type bladed stirrer (motor: HEDION three-one motor 600G) to obtain a paste-like kneaded product. Further, 16 g of a caking improver (sodium sulfate) and water in a total amount of 400 ml were added to the obtained paste to make an injection solution.
The one-dimensional penetration distance and stability of the prepared injection were measured by the following test method. The results are shown in Table 1.
実施例2〜6(実施例5,6は参考例)
実施例1と同量の高炉水砕スラグ及びアルカリ刺激剤の合計量(P1)に対して、表1に示す倍量の水(W)を用い、水に溶解又は分散して粘性を与える高分子物質(メチルセルロース:松本油脂(株)社製)0.4g、分散剤(オレフィン−マレイン酸共重合体塩:日本ゼオン)2.0gの存在下に攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で20℃、5分間激しく攪拌混練して、ペースト状の混練物を得た。
得られたペーストにさらに固結性改良剤(硫酸ナトリウム)16g及び水を加え、全量を400mlとした。調製した注入液の一次元浸透距離及び安定性を下記の試験法で測定した。結果を表1に纏めて示す。
Examples 2 to 6 (Examples 5 and 6 are reference examples)
The same amount of blast furnace granulated slag and alkali stimulant as in Example 1 (P1) is used, and double the amount of water (W) shown in Table 1 is used to dissolve or disperse in water and give viscosity. Stirrer with propeller blades in a stirring tank (motor) in the presence of 0.4 g of molecular substance (methylcellulose: Matsumoto Yushi Co., Ltd.) and 2.0 g of dispersant (olefin-maleic acid copolymer salt: Nippon Zeon) : HEDIION three-one motor 600G) was vigorously stirred and kneaded at 20 ° C. for 5 minutes to obtain a paste-like kneaded product.
16 g of caking improver (sodium sulfate) and water were further added to the obtained paste to make a total amount of 400 ml. The one-dimensional penetration distance and stability of the prepared injection were measured by the following test method. The results are summarized in Table 1.
比較例1
実施例1と同量の高炉水砕スラグ及びアルカリ刺激剤の合計量(P1)に対して20mlの水(W)を用い分散剤(オレフィン−マレイン酸共重合体塩:日本ゼオン)2.0gの存在下に、攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で攪拌混練しようと試みたが均一なペーストを得ることができなかった。
Comparative Example 1
20 g of water (W) is used for the total amount (P1) of granulated blast furnace slag and alkali stimulant in the same amount as in Example 1, and 2.0 g of dispersant (olefin-maleic acid copolymer salt: Nippon Zeon). In the presence of this, an attempt was made to stir and knead with a propeller type bladed stirrer (motor: HEDION three-one motor 600G) in a stirring tank, but a uniform paste could not be obtained.
比較例2及び3
実施例1と同量の高炉水砕スラグ及びアルカリ刺激剤の合計量(P1)に対して表1に示す倍量の水(W)を用い、実施例1と同じ種類及び量の分散剤の存在下、水に溶解又は分散して粘性を与える高分子物質無添加で、攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で20℃、5分間激しく攪拌して、懸濁液を得た。
得られた懸濁液にさらに固結性改良剤(硫酸ナトリウム)16gを加え、調製した注入液の一次元浸透距離を下記の試験法で測定した。結果を表1に纏めて示す。
Comparative Examples 2 and 3
Using the same amount and amount of dispersant as in Example 1 using double the amount of water (W) shown in Table 1 with respect to the total amount (P1) of ground granulated blast furnace slag and alkali stimulant as in Example 1. In the presence, without adding a polymer substance that gives viscosity by dissolving or dispersing in water, vigorously stirred at 20 ° C. for 5 minutes with a propeller-type bladed stirrer (motor: HEDION Three-One Motor 600G), suspended A liquid was obtained.
16 g of a caking improver (sodium sulfate) was further added to the obtained suspension, and the one-dimensional penetration distance of the prepared injection was measured by the following test method. The results are summarized in Table 1.
比較例4
実施例1と同量の高炉水砕スラグ及びアルカリ刺激剤の合計量(P1)に対して表1に示す倍量の水(W)を用い、実施例1と同じ種類及び量の水に溶解又は分散して粘性を与える高分子物質及び分散剤の存在下、攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で20℃、5分間激しく攪拌して、懸濁液を得た。
得られた懸濁液にさらに固結性改良剤(硫酸ナトリウム)16gを加え、調製した注入液の一次元浸透距離を下記の試験法で測定した。結果を表1に纏めて示す。
なお、以下に示す表1中、
1.W/P1:一次混練時の微粒子水砕スラグ、アルカリ刺激剤(難溶型)の合計量(P1)に対する水の比率、
2.一次元浸透距離(cm):、JGS0812(安定処理土静的締固めによる供試体作成方法の2.)の試験用具に規定する注入装置に準じる試験用具、懸濁液を経て最終的に調製された懸濁型地盤改良材を圧力容器に充填し、これを空隙率41%で豊浦砂を詰めたφ5cm、長さ1mの試料管に、コンプレッサーにより下方から加圧注入し、管を上昇する調製液の高さを計測した。
表1の結果から、本発明の懸濁型地盤改良材は、注入液の安定性は良好であり、地盤への浸透距離も優れている(実施例1〜6)。これに対して比較例2及び3は、一次混練時の比率(W/P1)が高いところで高分子物質を無添加の状態で混練したが、安定性及び浸透性は良くなかった。これらの比較例に対する実施例6ではW/P1が高いところでも、高分子物質を添加しているため優れた安定性と浸透性が得られた。
Comparative Example 4
Using the same amount and amount of water (W) as shown in Table 1 with respect to the total amount (P1) of ground granulated blast furnace slag and alkaline stimulant as in Example 1, dissolved in the same type and amount of water as in Example 1. Alternatively, in the presence of a polymer substance that disperses and gives viscosity, and a dispersing agent, the mixture is vigorously stirred at 20 ° C. for 5 minutes with a propeller type bladed stirrer (motor: HEDION three-one motor 600G) in a stirring tank to obtain a suspension. It was.
16 g of a caking improver (sodium sulfate) was further added to the obtained suspension, and the one-dimensional penetration distance of the prepared injection was measured by the following test method. The results are summarized in Table 1.
In Table 1 shown below,
1. W / P1: The ratio of water to the total amount (P1) of finely divided granulated slag and alkali stimulant (slightly soluble type) during primary kneading,
2. One-dimensional penetration distance (cm): JGS0812 (2 of specimen preparation method by static compaction static compaction) Test tool according to the injection device specified in the test tool, finally prepared through suspension The suspension type ground improvement material was filled into a pressure vessel, and this was pressurized into the sample tube with a porosity of 41% and filled with Toyoura sand, φ5 cm and 1 m in length from below by a compressor, and the tube was raised. The height of the liquid was measured.
From the result of Table 1, the suspension type ground improvement material of this invention has the stability of injection | pouring liquid, and the penetration distance to the ground is also excellent (Examples 1-6). On the other hand, Comparative Examples 2 and 3 kneaded the polymer substance without addition at a high ratio (W / P1) during the primary kneading, but the stability and permeability were not good. In Example 6 for these comparative examples, even when W / P1 was high, excellent stability and permeability were obtained because a polymer substance was added.
実施例7
高炉水砕スラグ(スミットメント スーパー10、ブレーン値 10,000cm2/g;住金鹿島鉱化株式会社) 120g(P2)に対して120mlの水(W)を用い、分散剤(オレフィン−マレイン酸共重合体塩:日本ゼオン)2.0g及び高分子物質(メチルセルロース:松本油脂(株)社製)0.4gの存在下に攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で20℃、5分間激しく攪拌混練(一次混練)して、ペースト状の混練物を得た。得られたペーストに水酸化ナトリウム10g、さらに水を加え360mlとした。
直ちに一次元浸透距離を前記の試験法で測定した。
結果を表2に纏めて示す。
Example 7
Blast furnace granulated slag (Smitment Super 10, Brain value 10,000 cm 2 / g; Sumikin Kashima Mineral Co., Ltd.) 120 g (P2) of 120 ml of water (W) and dispersant (olefin-maleic acid co With a stirrer with a propeller blade (motor: HEDION three-one motor 600G) in a stirring tank in the presence of 2.0 g of polymer salt: Nippon Zeon) and 0.4 g of a polymer substance (methyl cellulose: manufactured by Matsumoto Yushi Co., Ltd.) The mixture was vigorously stirred and kneaded (primary kneading) at 20 ° C. for 5 minutes to obtain a paste-like kneaded product. To the obtained paste, 10 g of sodium hydroxide and water were added to make 360 ml.
The one-dimensional penetration distance was immediately measured by the above test method.
The results are summarized in Table 2.
実施例8〜10(実施例10は参考例)
実施例7と同量の高炉水砕スラグ(P2)に対して、表2に示す倍量の水(W)を用い、分散剤(オレフィン−マレイン酸共重合体塩:日本ゼオン)2.0g及び高分子物質(メチルセルロース:松本油脂(株)社製)0.4gの存在下に攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で20℃、5分間激しく攪拌混練(一次混練)して、ペースト状の混練物を得た。
得られたペーストにさらに水酸化ナトリウム10g及び水を加え、全量を360mlとした。調製した注入液の一次元浸透距離を前記の試験法で測定した。結果を表2に纏めて示す。
なお、W/P2:一次混練時の微粒子水砕スラグ(P2)に対する水の比率である。
Examples 8 to 10 (Example 10 is a reference example)
For the same amount of granulated blast furnace slag (P2) as in Example 7, double the amount of water (W) shown in Table 2 was used, and 2.0 g of dispersant (olefin-maleic acid copolymer salt: Nippon Zeon). In addition, in the presence of 0.4 g of a polymer substance (methylcellulose: manufactured by Matsumoto Yushi Co., Ltd.), the mixture is vigorously stirred and kneaded (primary) for 5 minutes at 20 ° C. with a propeller-type bladed stirrer (motor: HEDION three-one motor 600G) Kneading) to obtain a paste-like kneaded product.
To the obtained paste, 10 g of sodium hydroxide and water were further added to make a total amount of 360 ml. The one-dimensional penetration distance of the prepared injection was measured by the above test method. The results are summarized in Table 2.
Note that W / P2 is the ratio of water to the finely divided granulated slag (P2) during primary kneading.
比較例5〜8
実施例7と同量の高炉水砕スラグ(P2)に対して、表2に示す倍量の水(W)を用い、分散剤(オレフィン−マレイン酸共重合体塩:日本ゼオン)2.0g及び高分子物質(メチルセルロース:松本油脂(株)社製)0.4gの添加又は無添加の状態で攪拌槽中でプロペラ型羽根付き攪拌機(モーター:HEDIONスリーワンモーター600G)で20℃、5分間激しく攪拌混練(一次混練)して、ペースト状の混練物を得た。
得られたペーストにさらに水酸化ナトリウム10g及び水を加え、全量を360mlとした。調製した注入液の一次元浸透距離を前記の試験法で測定した。結果を表2に纏めて示す。
表2の結果から、溶解型アルカリ刺激剤を用いる場合でも、混練時に高分子物質を含有させることにより、優れた浸透性と安定性が得られることが明らかである。
Comparative Examples 5-8
For the same amount of granulated blast furnace slag (P2) as in Example 7, double the amount of water (W) shown in Table 2 was used, and 2.0 g of dispersant (olefin-maleic acid copolymer salt: Nippon Zeon). And 0.4 g of polymer substance (Methylcellulose: manufactured by Matsumoto Yushi Co., Ltd.) with or without addition, vigorously stirred at 20 ° C. for 5 minutes with a propeller-type bladed stirrer (motor: HEDION Three-One Motor 600G) The mixture was stirred and kneaded (primary kneading) to obtain a paste-like kneaded product.
To the obtained paste, 10 g of sodium hydroxide and water were further added to make a total amount of 360 ml. The one-dimensional penetration distance of the prepared injection was measured by the above test method. The results are summarized in Table 2.
From the results shown in Table 2, it is clear that even when a soluble alkaline stimulant is used, excellent penetrability and stability can be obtained by incorporating a polymer substance during kneading.
実施例11〜12及び比較例9
実施例1に準じ、1000MLの水に、表3に示す量の水砕スラグ(主剤)、アルカリ刺激剤(増強剤)、高分子物質及び分散剤を攪拌混練(一次混練)してペースト状の混練物を得た。この混練物に更に表3に示す量の固結性改良剤(硬化剤)、及び水を加え全量を10Lの注入液を調製した。このように調製した注入液の分離安定性を次のように試験し、評価した。
注入液を200ccビーカーに入れ静置し、1時間ごとにビーカー中の水砕スラグ及びアルカリ刺激剤の沈降状態を観察し、沈降する層の厚さ及びビーカー中を軽く攪拌し、再分散性を観察した。沈降しても容易に再分散する:◎、沈降するが再分散するもの:△、かなり沈降し再分散困難なもの:×
その結果を表3に示す。
表3から、高分子物質の添加により注入液中の水砕スラグ及びアルカリ刺激剤の沈降は少なく、時間が経過しても極めて容易に再分散し、注入液の分離安定性は極めて優れている。一方、高分子物質無添加の場合、短時間の経過で水砕スラグ及びアルカリ刺激剤が沈降し、沈降物の再分散は、出来なかった。
Examples 11-12 and Comparative Example 9
According to Example 1, 1000 mL of water was stirred and kneaded (primary kneaded) with the amount of granulated slag (main agent), alkali stimulant (enhancement agent), polymer substance and dispersant shown in Table 3 in a paste form. A kneaded product was obtained. The kneaded product was further added with a caking improver (curing agent) in the amounts shown in Table 3 and water to prepare an injection solution having a total amount of 10 L. The separation stability of the injection solution thus prepared was tested and evaluated as follows.
Place the injected solution in a 200 cc beaker and allow it to stand, and observe the sedimentation state of the granulated slag and alkali stimulant in the beaker every hour. Observed. Easily redispersed even after settling: A, settling but redispersed: Δ, settling considerably difficult to redisperse: ×
The results are shown in Table 3.
From Table 3, the addition of the polymer substance causes little sedimentation of the granulated slag and alkali stimulant in the injection solution, re-dispersed very easily over time, and the separation stability of the injection solution is extremely excellent. . On the other hand, when no polymer substance was added, the granulated slag and the alkaline stimulant settled in a short time, and the sediment could not be redispersed.
本発明の懸濁型地盤改良材は、注入液の分離安定性が優れ、シルト質土の含有率の高い、粒度分布の広い土質の地盤への浸透性が良好である。固結体強度も高く、懸濁型地盤改良材としての適用性を拡大するものであり、産業上極めて有用である。 The suspension-type ground improvement material of the present invention is excellent in the separation stability of the injected solution, and has a good permeability to the soil ground having a high silty soil content and a wide particle size distribution. The strength of the solidified body is also high, expanding the applicability as a suspension type ground improvement material, and is extremely useful in industry.
Claims (6)
(a)微粒子水砕スラグ 40〜500kg、
(b)アルカリ刺激剤 10〜100kg、
(c)減水剤 0.1〜20kg、
(d)水に溶解又は分散して粘性を与える、前記減水剤(c)ではない高分子物質 0.2〜5.0kg、
(e)水溶性硫酸塩である固結性改良剤 0〜100kg、及び
(f)残部が水
を含有する懸濁型地盤改良材を調製するに際し、微粒子水砕スラグ(a)をアルカリ刺激剤(b)の無添加又は添加の状態で、アルカリ刺激剤(b)無添加の場合は該スラグに対して、またアルカリ刺激剤(b)添加の場合は該スラグとアルカリ刺激剤との合計量に対して、0.3〜1.0倍量の水と、減水剤(c)、及び水に溶解又は分散して粘性を与える高分子物質(d)の存在下に混練して懸濁液を調製し、次いで得られた懸濁液に、必要な(b)、(e)及び(f)成分を加えることを特徴とする懸濁型地盤改良材の製造方法。 The following amount per 1 m 3 of suspension type ground improvement material: (a) 40 to 500 kg of granulated granulated slag,
(B) 10-100 kg of alkali stimulant,
(C) 0.1-20 kg of water reducing agent ,
(D) 0.2 to 5.0 kg of a polymer substance that is not the water reducing agent (c) and is dissolved or dispersed in water to give viscosity;
(E) Solidification improver that is a water-soluble sulfate, 0 to 100 kg, and (f) In preparing a suspension-type ground improvement material that contains water, the finely divided granulated slag (a) is used as an alkali stimulant. In the state of no addition or addition of (b), the total amount of the slag and the alkali stimulant with respect to the slag when the alkali stimulant (b) is not added, and with the alkali stimulant (b). And kneaded in the presence of 0.3 to 1.0 times the amount of water, a water reducing agent (c), and a polymer substance (d) that dissolves or disperses in water to give viscosity. And then adding the necessary components (b), (e) and (f) to the resulting suspension.
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JPH07119138A (en) * | 1993-10-20 | 1995-05-09 | Kyokado Eng Co Ltd | Grout |
JPH11116316A (en) * | 1997-10-09 | 1999-04-27 | Denki Kagaku Kogyo Kk | Grouting material |
JPH11293246A (en) * | 1998-02-16 | 1999-10-26 | Mitsui Chem Inc | Suspension-type grout and soil improvement therewith |
JP2003171165A (en) * | 2001-12-05 | 2003-06-17 | Denki Kagaku Kogyo Kk | Impregnating agent |
JP2004345898A (en) * | 2003-05-22 | 2004-12-09 | Nittetsu Cement Co Ltd | Grout composition |
JP2005097413A (en) * | 2003-09-25 | 2005-04-14 | Mitsui Kagaku Sanshi Kk | Method for preparing suspension type soil stabilizer |
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JPH07119138A (en) * | 1993-10-20 | 1995-05-09 | Kyokado Eng Co Ltd | Grout |
JPH11116316A (en) * | 1997-10-09 | 1999-04-27 | Denki Kagaku Kogyo Kk | Grouting material |
JPH11293246A (en) * | 1998-02-16 | 1999-10-26 | Mitsui Chem Inc | Suspension-type grout and soil improvement therewith |
JP2003171165A (en) * | 2001-12-05 | 2003-06-17 | Denki Kagaku Kogyo Kk | Impregnating agent |
JP2004345898A (en) * | 2003-05-22 | 2004-12-09 | Nittetsu Cement Co Ltd | Grout composition |
JP2005097413A (en) * | 2003-09-25 | 2005-04-14 | Mitsui Kagaku Sanshi Kk | Method for preparing suspension type soil stabilizer |
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