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學術出版;;Publications

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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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1996 - 19973

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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Lin, CCSubject: search.filters.subject.cement

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Now showing 1 - 3 of 3
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    Item type:Item,
    An NMR and XRD study of solidification/stabilization of chromium with portland cement and beta-C2S
    (1996-06-01)
    Lin, CK
    ;
    Chen, JN
    ;
    Lin, CC
    ;
    環境工程研究所
    ;
    材料科學與工程學系
    Solidificalion/stabilization of chromium with Portland cement Type I and P-dicalcium silicate (beta-C2S) was investigated by means of the Si-29 solid stale Magic Angle Spinning/Nuclear Magnetic Resonance (Si-29 MAS/NMR) and X-ray Diffraction (XRD) techniques. It is found that chromium nitrate can increase the extent of beta-C2S hydration. It is also confirmed that the chromium ion is easily incorporated into the beta-C2S paste and hydrated Portland cement, and that it affects the characteristics of hydration and hydration products. Formation of beta-calcium chromium oxide hydrate (beta-CaCrO4 . 2H2(O)) during the hydration of chromium-doped beta-C2S and calcium chromium oxide hydrate (CaCrO4 . 2H(2)O) during the hydration of chromium-doped Portland cement indicates the substitution of chromium for silicon in hydration products. The chromium ion, Cr3+, is thus stabilized and solidified through this mechanism.
  • Thumbnail Image
    Item type:Item,
    An NMR and XRD study of solidification/stabilization of chromium with portland cement and beta-C2S
    (1996-06-01)
    Lin, CK
    ;
    Chen, JN
    ;
    Lin, CC
    ;
    環境工程研究所
    ;
    材料科學與工程學系
    Solidificalion/stabilization of chromium with Portland cement Type I and P-dicalcium silicate (beta-C2S) was investigated by means of the Si-29 solid stale Magic Angle Spinning/Nuclear Magnetic Resonance (Si-29 MAS/NMR) and X-ray Diffraction (XRD) techniques. It is found that chromium nitrate can increase the extent of beta-C2S hydration. It is also confirmed that the chromium ion is easily incorporated into the beta-C2S paste and hydrated Portland cement, and that it affects the characteristics of hydration and hydration products. Formation of beta-calcium chromium oxide hydrate (beta-CaCrO4 . 2H2(O)) during the hydration of chromium-doped beta-C2S and calcium chromium oxide hydrate (CaCrO4 . 2H(2)O) during the hydration of chromium-doped Portland cement indicates the substitution of chromium for silicon in hydration products. The chromium ion, Cr3+, is thus stabilized and solidified through this mechanism.
  • Thumbnail Image
    Item type:Item,
    An NMR, XRD and EDS study of solidification/stabilization of chromium with portland cement and C3S
    (1997-09-01)
    Lin, CK
    ;
    Chen, JN
    ;
    Lin, CC
    ;
    環境工程研究所
    ;
    材料科學與工程學系
    Solidification/stabilization (S/S) of chromium with Portland cement type I and tricalcium silicate (C3S) was investigated by using the Si-29 solid state magic angle spinning/nuclear magnetic resonance (Si-29 MAS/NMR), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The present study confirms that chromium nitrate can increase the extent of C3S hydration. It also confirms that the chromium ion is easily incorporated into the C3S paste and hydrated Portland cement, and that it affects the characteristics of the hydration processes and their hydration products, The formation of calcium chromium silicate (CaCrSi4O10), calcium chromium oxide hydrate (CaCrO4 . 2H(2)O), and calcium dichromate (CaCr2O7) during the hydration of chromium-doped C3S indicates the probable substitution of chromium for silicon in the calcium silicate hydrate (C-S-H) and the interaction between Cr and Si. Furthermore, formation of CaCrSi4O10, aluminum chromium oxide hydroxide hydrate (Al(OH)CrO4 . H2O), aluminum chromium oxide hydroxide (Al-2(OH)(4)CrO4), and CaCr2O7 during the hydration of chromium-doped cement reveals not only the probable substitution of chromium for silicon in the calcium silicate hydrate (C-S-H) but also the interaction among Cr, Si and Al, Apparently, the chromium iron (Cr3+) may also be stabilized and solidified through these mechanisms in addition to those proposed by other investigators. (C) 1997 Elsevier Science B.V.