WO2008114877A1 - 低放射化水硬性組成物、低放射化セメント、及びそれらの製造方法 - Google Patents
低放射化水硬性組成物、低放射化セメント、及びそれらの製造方法 Download PDFInfo
- Publication number
- WO2008114877A1 WO2008114877A1 PCT/JP2008/055346 JP2008055346W WO2008114877A1 WO 2008114877 A1 WO2008114877 A1 WO 2008114877A1 JP 2008055346 W JP2008055346 W JP 2008055346W WO 2008114877 A1 WO2008114877 A1 WO 2008114877A1
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- Prior art keywords
- cement
- low
- parts
- activation
- low activation
- Prior art date
Links
- 239000004568 cement Substances 0.000 title claims abstract description 98
- 239000000203 mixture Substances 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 35
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000292 calcium oxide Substances 0.000 claims abstract description 33
- 239000000404 calcium aluminium silicate Substances 0.000 claims abstract description 30
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 235000012215 calcium aluminium silicate Nutrition 0.000 claims abstract description 29
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229940078583 calcium aluminosilicate Drugs 0.000 claims abstract description 28
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000004017 vitrification Methods 0.000 claims abstract description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000004913 activation Effects 0.000 claims description 63
- 239000002994 raw material Substances 0.000 claims description 45
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 18
- 239000010440 gypsum Substances 0.000 claims description 10
- 229910052602 gypsum Inorganic materials 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 27
- 239000004567 concrete Substances 0.000 abstract description 25
- 230000005855 radiation Effects 0.000 abstract description 8
- 229910052681 coesite Inorganic materials 0.000 abstract description 6
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 6
- 229910052682 stishovite Inorganic materials 0.000 abstract description 6
- 229910052905 tridymite Inorganic materials 0.000 abstract description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 60
- 239000000463 material Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000843 powder Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000004570 mortar (masonry) Substances 0.000 description 11
- 239000011398 Portland cement Substances 0.000 description 10
- 239000004576 sand Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- 230000036571 hydration Effects 0.000 description 7
- 238000006703 hydration reaction Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000011400 blast furnace cement Substances 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- -1 Ak0 3 Inorganic materials 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910000213 hydrogarnet Inorganic materials 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 235000014380 magnesium carbonate Nutrition 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 239000002901 radioactive waste Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- DUFCMRCMPHIFTR-UHFFFAOYSA-N 5-(dimethylsulfamoyl)-2-methylfuran-3-carboxylic acid Chemical compound CN(C)S(=O)(=O)C1=CC(C(O)=O)=C(C)O1 DUFCMRCMPHIFTR-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 229910001361 White metal Inorganic materials 0.000 description 1
- DHNCFAWJNPJGHS-UHFFFAOYSA-J [C+4].[O-]C([O-])=O.[O-]C([O-])=O Chemical compound [C+4].[O-]C([O-])=O.[O-]C([O-])=O DHNCFAWJNPJGHS-UHFFFAOYSA-J 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000516 activation analysis Methods 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 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
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 229910021540 colemanite Inorganic materials 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- ZMMRKRFMSDTOLV-UHFFFAOYSA-N cyclopenta-1,3-diene zirconium Chemical compound [Zr].C1C=CC=C1.C1C=CC=C1 ZMMRKRFMSDTOLV-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 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
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011850 water-based material Substances 0.000 description 1
- 239000010969 white metal Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 description 1
- MNUKOWCSUUMTRC-UHFFFAOYSA-F zirconium(4+) octachloride Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Zr+4].[Zr+4] MNUKOWCSUUMTRC-UHFFFAOYSA-F 0.000 description 1
- ZXAUZSQITFJWPS-UHFFFAOYSA-J zirconium(4+);disulfate Chemical compound [Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZXAUZSQITFJWPS-UHFFFAOYSA-J 0.000 description 1
- HAIMOVORXAUUQK-UHFFFAOYSA-J zirconium(iv) hydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Zr+4] HAIMOVORXAUUQK-UHFFFAOYSA-J 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 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
- C04B7/00—Hydraulic cements
- C04B7/345—Hydraulic cements not provided for in one of the groups C04B7/02 - C04B7/34
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/04—Concretes; Other hydraulic hardening materials
- G21F1/042—Concretes combined with other materials dispersed in the carrier
-
- 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
- C04B2111/00862—Uses not provided for elsewhere in C04B2111/00 for nuclear applications, e.g. ray-absorbing concrete
Definitions
- the present invention relates to a low-activation hydraulic composition, low-activation cement, and a method for producing the same for use in low-activation concrete.
- Low activation concrete is a concrete that has not only a radiation shielding function but also a function to reduce residual radioactivity, and it is used in nuclear facilities and accelerator facilities.
- white cement is known as a high-alumina cement as a cement used in the low activation concrete (for example, see Patent Document 1 and Non-Patent Document 1). These cements are the dominant nuclides for the clearance level concentration ratio
- white cement is less radioactive than high alumina cement.
- the high-alumina cement has a problem that it is difficult to maintain long-term strength due to phase transition (conversion), and the Eu and Co content limits to satisfy the clearance level are, for example, 0.3 for Eu.
- Non-Patent Document 3 7_hardness made of CaO-Al 2 0 3 -Si0 2 glass Compounds are known (eg, patent literature) 2, see Non-Patent Document 4) This is because it reacts with water to produce hydrogarnet (3CaO • Ak0 3 '6H 2 0) stratingite (2 &0' in 1 2 0 3 '310 2 ' 83 ⁇ 40) Mainly hydrated Is known to be superior in sulfate resistance and acid resistance (see Non-Patent Document 4, for example). However, there is no mention of use as an admixture or application to low activation cement.
- Patent Document 3 Japanese Patent Laid-Open No. 62-133394
- Patent Document 2 US Patent Publication No. 4605443
- Patent Document 3 Japanese Patent No. 2501576
- Patent Document 4 Japanese Patent Laid-Open No. 61-215999
- Non-Patent Document 1 Masaharu Kaneno, “Current Status of Development of Low Activation Concrete”, Concrete Engineering, Japan Concrete Institute, June 2004, No. 42, No. 6, p. 3-10
- Non-Patent Literature 2 Masa aru KIN O, Ken-ichi KIMURA and Takashi NAKAMURA, "Raw Materials for Low-Activation Concrete Neutron Shields", Journal of NUCLEAR SCIENCE and TECHNOLOGY, December 2002, Vol.39, No.12, p. 1275-1280
- Non-Patent Document 3 Koji Shirai, Ryoji Sonobe, “Development of low-activity, high-performance materials for concrete cask”, Report of Central Research Institute of Electric Power, Central Research Institute of Electric Power, July 2005, N04033
- Non-Patent Document 4 JOHN F. MacDOWELL, "STRATLINGITEAND HYDROGARNET FROM CALCIUM ALUMINOSILICATE GLASS CEMENTS", Mat. Res. Soc. Symp. Proc, Materials Research Society, 1991, Vol.179, p.159-179
- Non-Patent Document 5 Cement Material Chemistry, Yasuo Arai, Dai Nippon Books, 204–2 05, Table 6-1, 210–211, Table 6 ⁇ 4 Disclosure of the invention
- An object of the present invention is to provide a low-activation hydraulic composition, a low-activation cement, and a production method thereof. Means for solving the problem
- the present invention employs the following means.
- a low activation cement is produced by mixing 35 to 98 parts of the low activation hydraulic composition of (1) or (2) above with 100 parts of the low activation cement. Low-activation cement manufacturing method. The invention's effect
- the “clearance level” as used in the present invention refers to the concentration of radionuclide that serves as a judgment criterion for classifying items that may be excluded from the regulatory system for radiation protection.
- concentration of radionuclide equivalent to 10 ⁇ Sv / year is 152 E
- the radionuclides of u, 154 Eu, and 60 Co are less than 0.1 Bq / g
- the parts and percentages used in the present invention are based on mass unless otherwise specified.
- cement paste is a generic term for cement paste, mortar, and concrete
- the term “calcium aluminosilicate” as used in the present invention refers to Eu, which is the dominant element of u and 6e Co, which is the dominant nuclide for the clearance level concentration ratio. This refers to a hydraulic composition with a Co content of less than 0.3 mg kg Eu and less than 15 mg / kg Co. If a hydraulic composition exceeding these ranges is used in nuclear facilities, etc., it will be contained in cement concrete.
- Calcium aluminosilicate of the present invention contains CaO, Ak0 3 and S1O2 as chemical components. Is the main component.
- the CaO raw material is not particularly limited, and examples include use of quick lime (CaO), slaked lime (Ca (OH) 2 ), wollastonite (CaC0 3 ) and the like. In any case, it is preferable to use a CaO raw material that satisfies the clearance level.
- the selection of the A1 20 3 raw material used in the present invention is not particularly limited, but it is preferable to use an A1 2 0 3 raw material that satisfies the clearance level. From the viewpoint of cost and availability, the use of Bayer alumina is preferred.
- Payer method alumina is obtained by dissolving bauxite, a raw material, in caustic soda using an autoclave, crystallizing aluminum hydroxide from the purified solution, and firing it in a rotary kiln at 1200 ° C or higher.
- Alumina The Bayer method alumina used in the present invention is not particularly limited, but the chemical composition preferably has an ALCh content of 90% or more, and more preferably 95% or more. Further, the content contained in the Bayer method alumina used in the present invention is preferably 0.5% or less, and more preferably 0.3% or less.
- Si0 2 raw material used in the present invention is not particularly limited, for example Kei stone, Kei sand, quartz, and the use of such Kei diatomaceous earth. Both the use of Si0 2 material which satisfies the clearance level is preferable.
- the MgO raw material used in the present invention is not particularly limited.
- molten magnesia such as sintered magnesia, natural magnesia, and light-burned magnesia
- the MgO raw material used here refers to magnesium oxide (Mg (OH) 2), magnesium carbonate (MgC0 3 ) extracted from seawater by the seawater method, magnesite natural MgO, or natural carbonic acid magnesia in a rotary kiln.
- a sintered magnetic clinker obtained by firing, and an electrofused magnesia clinker obtained by melting the sintered magnetic clinker in an electric furnace or the like, are pulverized to a predetermined size and sieved.
- Zr_ ⁇ 2 raw material used in the present invention is not particularly limited, the use of Zr0 2 raw material satisfaction clearance levels are preferred. Among them, it is preferable to use a Zr0 2 raw material made from an acid solution oxidized zirconium zirconium chloride extracted by alkaline decomposition of a mineral such as zircon or padeleyite.
- a Zr0 2 raw material made from an acid solution oxidized zirconium zirconium chloride extracted by alkaline decomposition of a mineral such as zircon or padeleyite.
- acid zirconium, hydroxide zirconium, carbonate carbon, oxygen examples include use of zirconium chloride, zirconium sulfate, zirconium acetate, and organic acid zirconium.
- Eu content is preferably less than 0.3 mg / kg
- Co content is preferably less than 15 mg / kg
- Eu content is less than 0.08 mg / kg
- Co content Is more preferably less than 2 mg / kg.
- Cement clinker is manufactured by blending these raw materials at a predetermined ratio, then melting them in an electric furnace, a high-frequency furnace, or a kiln furnace, rapidly cooling them, and vitrifying them.
- the melting temperature is preferably 1500 ° C or higher, more preferably 1600 ° C or higher. Below 1500 ° C, the raw material may be insufficiently melted or vitrified due to rapid cooling.
- the vitrification rate of the cement clinker is preferably 70% or more, more preferably 80% or more, and most preferably 90% or more. If the vitrification rate is less than 70%, sufficient hydration activity may not be obtained.
- the measurement method of vitrification rate is as follows. 8 055346
- the calcium aluminosilicate of the present invention can also be produced by pulverizing a cement clinker.
- Calcium aluminosilicate the chemical composition of calcium ⁇ beam aluminosilicate, CaO, AI2O3, Si0 2, MgO, a total in ⁇ Pi Zr_ ⁇ 2, 'CaO is 25-55 parts, A1 2 0 3 is 16 to 45 parts More preferably, Si0 2 contains 23 to 40 parts, MgO 0 to 1 part, Zr0 2 force S 0 to 4 parts, CaO 27 to 53 parts, A1 2 0 3 17 to 43 parts, Si0 2 is 25 to 38 parts, MgO force S 0 to 1 part, and most preferably you to contain Zr0 2 force S 0 to 3 parts.
- the grinding method using only calcium aluminosilicate clinker or the mixing method of calcium aluminosilicate clinker and cement 'grinding method is not particularly limited.
- powder frame machines such as roller mills, jet mills, tube mills, ball mills, and vibration mills. The method of using is mentioned. Regardless of which device is used, a method of using a powder mill made of a material having excellent wear resistance and low Eu or Co content is preferred.
- the plane specific surface area is preferably 2000 to 8000 cm 2 / g, more preferably 4000 to 6000 cm 2 / g. If it is less than 2000 cm 2 / g, the hydration activity may be insufficient and the strength may be insufficient, and if it is 8000 cm 2 / g or more, the pulverization power may be excessive and uneconomical.
- the content of Eu and Co in the low activation hydraulic composition and low activation cement is analyzed using ICP-AES or ICP-MS after pretreatment according to JIS R 2522, for example.
- the activation analysis can also determine Eu and Co contents in low activation hydraulic compositions and low activation cements.
- the cement used in the present invention is not particularly limited, and ordinary cement can be used. Specifically, various portland cements such as normal, early strength, super early strength, moderate heat, and low heat, etc. Portland cement's mixed cement containing blast furnace slag, fly ash, or silica, filler cement mixed with limestone fine powder, blast furnace slow-cooled slag fine powder, etc. Examples include loose cement, alumina cement, and high alumina cement. One or more of these can be used in combination.
- the low activation cement of the present invention preferably contains gypsum.
- gypsum examples include anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum, and one or more of these can be used. Of these, anhydrous gypsum is preferred in terms of strength development.
- the amount of gypsum used in the present invention is preferably 1 to 10 parts, and 3 to 7 parts of 100 parts of low activation cement containing calcium aluminosilicate, cement and gypsum added as necessary. preferable.
- the amount of calcium aluminosilicate used in the present invention is preferably 35 to 98 parts, preferably 38 to 96 parts, in 100 parts of low activation cement containing calcium aluminosilicate, cement and gypsum added as necessary. More preferred is 45 to 80 parts. If it is less than 35 parts, the reduction of the Co content and Eu content in the low activation cement, which is the effect of the present invention, cannot be obtained, the shrinkage becomes large, and the effect of lowering the hydration exothermic temperature cannot be obtained. There is a case.
- the low activation cement as used in the present invention means that the content of Eu or Co which is the parent element of 15 3 ⁇ 4u or 6 ° Co which is the dominant nuclide with respect to the clearance level concentration ratio is uniquely determined by the site to be used.
- the hydraulic composition is preferably less than / kg and less than 15 mg / kg in Co.
- the Eu and Co content in the low activation cement is preferably less than 0.3 mg kg for Eu, less than 15 mg kg for Co, less than 0.08 mg kg for Eu, and less than 2 mg / kg for Co. More preferred.
- the water powder ratio is not particularly limited, but it is preferably 70% or less, more preferably 60% or less, and most preferably 50% or less.
- the structure of the low activation hardened body becomes rough and the shielding performance is inferior.
- the lower limit of the water powder ratio is 20% or more. More preferably, it is 25% or more.
- an aggregate having a low activation function for example, electrofused alumina, limestone and the like.
- water-reducing agent high-performance water-reducing agent, AE water-reducing agent, fluidizing agent, thickener, antifungal agent, anti-freezing agent, shrinkage reducing agent, setting modifier, silica, alumina, limestone fine powder, low activation cement
- clay minerals such as colemanite, zirconia, boron carbide and bentonite, and anion exchangers such as hydrotalcite, and fibrous materials such as vinylon fiber, acrylic fiber and carbon fiber are used in the present invention. It can be used as long as the purpose is not impaired.
- a low activation hydraulic composition and a low activation cement in which not only the radiation shielding performance but also the Eu content and Co content that cause residual radioactivity are reduced.
- a low-radiation-water-resistant hydraulic composition, a low-radiation cement capable of obtaining good fluidity, strength development, and dimensional stability, and reducing the hydration exothermic temperature that causes temperature cracking. , And their production method.
- Calcium aluminosilicates having the composition shown in Table 1 were prepared.
- Low activation cements with the compositions shown in Table 2 were prepared, and the Eu and Co contents contained in each low activation cement were measured by a predetermined method. The results are shown in Table 2.
- Calcium aluminosilicate al ⁇ i6 Mixed powder frame by mixing CaO raw material, A1 2 0 3 raw material 1, Si 0 2 raw material, MgO raw material, Zr0 2 raw material so as to have the composition of al 1 to 6 in Table 1. After that, it was put in a platinum dish and melted at 1650 ° C for 1 hour. After melting, the white metal pan containing the sample was placed on a water path and rapidly cooled to prepare samples with different vitrification rates. The sample was pulverized to a Blaine specific surface area of 4000 cm 2 / g using a powder grinder.
- CaO raw material Itoigawa, Niigata Prefecture, calcined limestone, CaO 99%, AkOs 0%, S1O2 1%, MgO 0%, Zr0 20 %, Co 0.23mg / kg, Eu 0.083mg / kg
- AI2O3 raw material 1 Aluminum oxide obtained by Nippon Light Metal Co., Ltd. by the Payer method (Bauxite as raw material is dissolved in caustic soda by autoclave, and aluminum hydroxide is crystallized from the purified solution, and it is 1200 ° C or more in the rotary kiln. ), CaO 0%, AI2O3 100%, S1O2 0%, MgO 0%, Zr0 20 %, Co 0.013mg / kg, Eu 0.0005mg / kg
- Si0 2 raw material Australian, quartz sand, CaO 0%, AI2O3 2%, S1O2 98%, MgO
- MgO raw material manufactured by Kanto Chemical Co., CaO 0%, Al 2 O 3 0%, SiO 2 0%, MgO 100%, ZrO 2
- Zr0 2 raw material Made by Daiichi Rare Element Chemical Industries, CaO 0%, AkO; 0%, Si0 20 %, MgO
- White Cement Taiheiyo Cement, trade name “White Cement”, density 3.05g / cm 3 plain specific surface area 3,700cm 2 / g
- Ordinary Portland cement manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “ordinary Portland cement”, density 3.15 g / cm 3 , Blaine specific surface area 3,400 cm 2 / g
- Medium-heated Portland cement manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “Den-forced medium-heated Portland cement”, density 3.20 g / cm 3 , Blaine specific surface area 3,100 cm 2 / g
- Low heat Portland cement Taiheiyo Cement, trade name “Low heat Portland cement”, density 3.21g / cm 3 , plain specific surface area 3,400cm 2 / g
- Blast Furnace Cement manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “Den Power Blast Furnace Cement”, Density 3.05g / cm ⁇ Blaine Specific Surface Area 3,800cm 2 / g
- Alumina Cement No. 1 Made by Denki Kagaku Kogyo Co., Ltd., trade name “Den-Force Alumina Cement No. 1”, density 3.00g / cm 3 , Blaine specific surface area 4,800cm 2 / g
- High-alumina cement manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “DEN-HIK HIGH-ALUMINUM CEMENT”, density 3.13g / cm 3 , plain specific surface area 4,800cm 2 / g
- Blast furnace slag manufactured by Nippon Steel Blast Furnace Cement, trade name “ESMENT J, density 2.9g / cm 3 , brain value 4000cm 2 / g
- Gypsum anhydrous gypsum, density 2.94 g / cm 3 , specific surface area of Blaine 4000 cm 2 Z g, commercial product (measurement method)
- CaO was determined the composition of Al 2 ⁇ 3, Si0 2. Further, in accordance with JIS R 2013-1998 "Methods for chemical analysis of alumina one zirconocene two Ashirika refractories", it was determined Zr0 2.
- Activation component content (Eu, Co content test): The measurement of Eu and Co content in low activation cement is first performed in accordance with JIS R 2522-1995 “Analytical method for alumina cement for refractories”. ICP-AES (manufactured by SII Nanotechnology,
- Vitrification rate Add 0.5 parts of magnesium oxide to 4.5 parts of low activation hydraulic composition, After thorough mixing in an agate mortar, powder X-ray diffraction measurement was performed. The measurement results were analyzed with the quantitative software “SIROQUANT” manufactured by Sietronics, and the vitrification rate was determined.
- C A S is a calcium guanoleminosy.
- the amount of free lime is the value in calcium aluminosilicate.
- A1 2 0 3 raw material 1 / A1 2 0 3 raw material 2 30/70 (mass ratio).
- ⁇ D / C The residual radioactivity after thermal neutron irradiation was measured as follows. The sample was pulverized with an aluminum mortar to a particle size of 1 mm or less, and lOOmg was enclosed in a quartz tube (outer diameter 7 mm, length 40 mm, thickness lmm SiC purity 99.99997%). The sample enclosed in the quartz tube was irradiated with a thermal neutron (nominal thermal neutron flux 5.3 X 10 13 ncm '(at 5.3 MW maximum output)) for 40 minutes at the Japan Atomic Energy Agency Tokai Research Institute (JMTR). Cooled for 6 months. Thereafter, the radioactive concentration of 154 Eu 15 3 ⁇ 4u 60 Co remaining in each sample was measured with a Ge semiconductor detector. Based on the obtained results, evaluation was performed by calculating ⁇ D / C shown in Equation 1.
- Example Tables 2 and 3 show that when the calcium aluminosilicate of the present invention is used, the content of Eu and Co is small, so that the low activation function is excellent.
- Standard sand Made by Cement Association, trade name "Standard sand for cement strength test", specific gravity 2.64 sand: Niigata Aomi lime sand, specific gravity 2.68
- Mortar was kneaded according to JIS R 5201-1997 “Cement physical test method” and the 15-point flow value immediately after kneading was measured.
- the combination of temperature, humidity, and mortar was the same as in the compressive strength test. Standard sand was used in the test.
- Compressive strength test 40 mm X 40 mm X 160 mm mortar specimens were prepared according to JIS R 5201-1997 "Cement physical test method", sealed with aluminum tape, and then measured for compressive strength on the 7th and 28th. . Standard sand was used in the test.
- Length change rate measurement 40mm x 40mm x 160mm mortar specimens were made according to JIS R 5201-1997 "Cement physical test method” and sealed with aluminum tape, then the length change from day to day The rate was measured according to JIS A 6202-1997 “Expanding material for concrete” Annex 2 (Reference) Test method B for constrained expansion and contraction of expanded concrete (Test method for expansion and contraction). Standard sand was used in the test.
- ACM-202L model was used and measured at a casting temperature of 20 ° C up to a material age of 7 days. In the measurement, sand and gravel were used.
- the low activation hydraulic composition of the present invention not only reduces the Eu content and Co content that cause residual radioactivity, but also reduces the hydration exothermic temperature that causes temperature cracking and is good. High strength expression can be obtained.
- the low activation hydraulic composition of the present invention can be suitably used for cement concrete structures such as nuclear facilities and accelerator facilities.
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Abstract
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EP08738736.1A EP2128872B1 (en) | 2007-03-16 | 2008-03-17 | Low-activation hydraulic setting composition, low-activation cement, and those production methods |
JP2009505267A JP4730976B2 (ja) | 2007-03-16 | 2008-03-17 | 低放射化水硬性組成物、低放射化セメント、及びそれら製造方法 |
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Cited By (5)
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JP2014089127A (ja) * | 2012-10-30 | 2014-05-15 | Takenaka Komuten Co Ltd | 放射線遮蔽壁 |
JP2015020101A (ja) * | 2013-07-18 | 2015-02-02 | 国立大学法人島根大学 | 放射線遮蔽能を有するヨウ素捕集材料 |
KR101621881B1 (ko) | 2015-09-08 | 2016-05-17 | 주식회사 제철세라믹 | 원전의 방호벽용 저방사화 시멘트 재료 및 그 제조 방법 |
WO2020100925A1 (ja) * | 2018-11-15 | 2020-05-22 | デンカ株式会社 | セメント混和材、膨張材、及びセメント組成物 |
JP2021017379A (ja) * | 2019-07-18 | 2021-02-15 | デンカ株式会社 | セメント混和材、膨張材、及びセメント組成物 |
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EP3266754A1 (en) | 2016-07-07 | 2018-01-10 | Ion Beam Applications S.A. | Compositions of low activation concrete and use thereof |
US10759697B1 (en) | 2019-06-11 | 2020-09-01 | MSB Global, Inc. | Curable formulations for structural and non-structural applications |
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Cited By (7)
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JP2014089127A (ja) * | 2012-10-30 | 2014-05-15 | Takenaka Komuten Co Ltd | 放射線遮蔽壁 |
JP2015020101A (ja) * | 2013-07-18 | 2015-02-02 | 国立大学法人島根大学 | 放射線遮蔽能を有するヨウ素捕集材料 |
KR101621881B1 (ko) | 2015-09-08 | 2016-05-17 | 주식회사 제철세라믹 | 원전의 방호벽용 저방사화 시멘트 재료 및 그 제조 방법 |
WO2017043881A1 (ko) * | 2015-09-08 | 2017-03-16 | 주식회사 제철세라믹 | 원전의 방호벽용 저방사화 시멘트 재료 및 그 제조 방법 |
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JP2021017379A (ja) * | 2019-07-18 | 2021-02-15 | デンカ株式会社 | セメント混和材、膨張材、及びセメント組成物 |
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EP2128872B1 (en) | 2017-07-05 |
JPWO2008114877A1 (ja) | 2010-07-08 |
EP2128872A1 (en) | 2009-12-02 |
JP4730976B2 (ja) | 2011-07-20 |
EP2128872A4 (en) | 2011-11-09 |
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