A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CALCIUM SULFITE-CONTAINING GYPSUM, CEMENT COMPOSITION, GROUND-IMPROVING MATERIAL AND GROUND-IMPROVING SOIL
To provide a calcium sulfite-containing gypsum capable of obtaining a soil-improving material capable of maintaining a high uniaxial compressive strength while reducing elution of hexavalent chromium.SOLUTION: A calcium sulfite-containing gypsum contains calcium sulfite and has a peak intensity ratio in a diffraction pattern obtained by powder XRD using CuKα rays satisfying formula (1): Ia/Ib<2 ... (1) (where Ia is a peak intensity at 2θ=15.76 to 16.25° and Ib is a peak intensity at 2θ=16.26 to 16.75°).SELECTED DRAWING: Figure 1
【課題】、六価クロムの溶出を低減しながらも、一軸圧縮強さを高く維持できる地盤改良材を得ることが可能な亜硫酸カルシウム含有石膏を提供すること。【解決手段】亜硫酸カルシウムを含む亜硫酸カルシウム含有石膏であって、ＣｕＫα線を用いた粉末ＸＲＤで得られる回折パターンにおけるピーク強度比が式（１）を満たす、亜硫酸カルシウム含有石膏を提供する。Ｉａ／Ｉｂ＜２ … （１）（但し、Ｉａは２θ＝１５．７６〜１６．２５°におけるピーク強度であり、Ｉｂは２θ＝１６．２６〜１６．７５°におけるピーク強度である。）【選択図】図１
CALCIUM SULFITE-CONTAINING GYPSUM, CEMENT COMPOSITION, GROUND-IMPROVING MATERIAL AND GROUND-IMPROVING SOIL
To provide a calcium sulfite-containing gypsum capable of obtaining a soil-improving material capable of maintaining a high uniaxial compressive strength while reducing elution of hexavalent chromium.SOLUTION: A calcium sulfite-containing gypsum contains calcium sulfite and has a peak intensity ratio in a diffraction pattern obtained by powder XRD using CuKα rays satisfying formula (1): Ia/Ib<2 ... (1) (where Ia is a peak intensity at 2θ=15.76 to 16.25° and Ib is a peak intensity at 2θ=16.26 to 16.75°).SELECTED DRAWING: Figure 1
【課題】、六価クロムの溶出を低減しながらも、一軸圧縮強さを高く維持できる地盤改良材を得ることが可能な亜硫酸カルシウム含有石膏を提供すること。【解決手段】亜硫酸カルシウムを含む亜硫酸カルシウム含有石膏であって、ＣｕＫα線を用いた粉末ＸＲＤで得られる回折パターンにおけるピーク強度比が式（１）を満たす、亜硫酸カルシウム含有石膏を提供する。Ｉａ／Ｉｂ＜２ … （１）（但し、Ｉａは２θ＝１５．７６〜１６．２５°におけるピーク強度であり、Ｉｂは２θ＝１６．２６〜１６．７５°におけるピーク強度である。）【選択図】図１
CALCIUM SULFITE-CONTAINING GYPSUM, CEMENT COMPOSITION, GROUND-IMPROVING MATERIAL AND GROUND-IMPROVING SOIL
亜硫酸カルシウム含有石膏、セメント組成物、地盤改良材及び地盤改良土
TAKAMATSU YUICHIRO (author) / SAKAI TETSUHIRO (author) / NODA KENJI (author) / ITO TAKAYASU (author) / KONISHI KAZUO (author)
2021-05-27
Patent
Electronic Resource
Japanese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
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C04B
Kalk
,
LIME
/
C09K
Materialien für Anwendungen, soweit nicht anderweitig vorgesehen
,
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR
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