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Oh, Jae Eun
Nano-AIMS 구조재료 연구실
Research Interests
  • Concrete Materials, Construction Materials, Cementless Binders

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High pressure study of low compressibility tetracalcium aluminum carbonate hydrates 3CaO center dot Al2O3 center dot CaCO3 center dot 11H(2)O

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Title
High pressure study of low compressibility tetracalcium aluminum carbonate hydrates 3CaO center dot Al2O3 center dot CaCO3 center dot 11H(2)O
Author
Moon, JuhyukOh, Jae EunBalonis, MagdalenaGlasser, Fredrik P.Clark, Simon M.Monteiro, Paulo J. M.
Keywords
AFM; Ambient pressures; Birch-Murnaghan equation of state; High pressure study; Isothermal bulk modulus; Monosulfates (D); Pressure transmitting mediums; Space Groups; Synchrotron x ray diffraction
Issue Date
2012-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CEMENT AND CONCRETE RESEARCH, v.42, no.1, pp.105 - 110
Abstract
Synchrotron X-ray diffraction data was collected from a sample of monocarboaluminate 3CaO center dot Al2O3 center dot CaCO3 center dot 11H(2)O from ambient pressure to 4.3 GPa. The refined crystal structure at ambient pressure is triclinic with parameters a=5.77(2) angstrom, b=8.47(5) angstrom, c=9.93(4) angstrom, alpha=64.6(2)degrees, beta=82.8(3)degrees, gamma=81.4(4)degrees, and space group of P1 or P (1) over bar. It showed some degree of perfectly reversible pressure-induced dehydration with a non-hygroscopic pressure-transmitting medium. However the dehydration effect does not critically affect a bulk modulus due to its strong framework. The isothermal bulk modulus of monocarboaluminate was found to be 53(5) GPa and 54(4)GPa with 3rd order and 2nd order Birch-Murnaghan Equation of state, respectively. That value is higher than for any other reported AFm or AFt phase. The pressure-volume behavior of the monocarboaluminate was compared with that of previous studied hemicarboaluminate.
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DOI
10.1016/j.cemconres.2011.08.004
ISSN
0008-8846
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UEE_Journal Papers
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