Pressure induced reactions amongst calcium aluminate hydrate phases

Ju-hyuk Moon; Jae Eun Oh; Magdalena Balonis; Fredrik P. Glasser; Simon M. Clark; Paulo J. M. Monteiro

doi:10.1016/j.cemconres.2011.02.004

Pressure induced reactions amongst calcium aluminate hydrate phases

Ju-hyuk Moon, Jae Eun Oh, Magdalena Balonis, Fredrik P. Glasser, Simon M. Clark, Paulo J. M. Monteiro

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

The compressibilities of two AFm phases (strätlingite and calcium hemicarboaluminate hydrate) and hydrogarnet were obtained up to 5 GPa by using synchrotron high-pressure X-ray powder diffraction with a diamond anvil cell. The AFm phases show abrupt volume contraction regardless of the molecular size of the pressure-transmitting media. This volume discontinuity could be associated to a structural transition or to the movement of the weakly bound interlayer water molecules in the AFm structure. The experimental results seem to indicate that the pressure-induced dehydration is the dominant mechanism especially with hygroscopic pressure medium. The Birch-Murnaghan equation of state was used to compute the bulk modulus of the minerals. Due to the discontinuity in the pressure-volume diagram, a two stage bulk modulus of each AFm phase was calculated. The abnormal volume compressibility for the AFm phases caused a significant change to their bulk modulus. The reliability of this experiment is verified by comparing the bulk modulus of hydrogarnet with previous studies. © 2011 Elsevier Ltd. All rights reserved.

Original language	English (US)
Pages (from-to)	571-578
Number of pages	8
Journal	Cement and Concrete Research
Volume	41
Issue number	6
DOIs	https://doi.org/10.1016/j.cemconres.2011.02.004
State	Published - Jun 2011
Externally published	Yes

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@article{105fcfaf47fd48e3b754134cb9100d4c,

title = "Pressure induced reactions amongst calcium aluminate hydrate phases",

abstract = "The compressibilities of two AFm phases (str{\"a}tlingite and calcium hemicarboaluminate hydrate) and hydrogarnet were obtained up to 5 GPa by using synchrotron high-pressure X-ray powder diffraction with a diamond anvil cell. The AFm phases show abrupt volume contraction regardless of the molecular size of the pressure-transmitting media. This volume discontinuity could be associated to a structural transition or to the movement of the weakly bound interlayer water molecules in the AFm structure. The experimental results seem to indicate that the pressure-induced dehydration is the dominant mechanism especially with hygroscopic pressure medium. The Birch-Murnaghan equation of state was used to compute the bulk modulus of the minerals. Due to the discontinuity in the pressure-volume diagram, a two stage bulk modulus of each AFm phase was calculated. The abnormal volume compressibility for the AFm phases caused a significant change to their bulk modulus. The reliability of this experiment is verified by comparing the bulk modulus of hydrogarnet with previous studies. {\textcopyright} 2011 Elsevier Ltd. All rights reserved.",

author = "Ju-hyuk Moon and Oh, {Jae Eun} and Magdalena Balonis and Glasser, {Fredrik P.} and Clark, {Simon M.} and Monteiro, {Paulo J. M.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-l1-004021 Acknowledgements: This publication was based on work supported in part by Award No. KUS-l1-004021, made by King Abdullah University of Science and Technology (KAUST). The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2011",

month = jun,

doi = "10.1016/j.cemconres.2011.02.004",

language = "English (US)",

volume = "41",

pages = "571--578",

journal = "Cement and Concrete Research",

issn = "0008-8846",

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T1 - Pressure induced reactions amongst calcium aluminate hydrate phases

AU - Moon, Ju-hyuk

AU - Oh, Jae Eun

AU - Balonis, Magdalena

AU - Glasser, Fredrik P.

AU - Clark, Simon M.

AU - Monteiro, Paulo J. M.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-l1-004021 Acknowledgements: This publication was based on work supported in part by Award No. KUS-l1-004021, made by King Abdullah University of Science and Technology (KAUST). The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2011/6

Y1 - 2011/6

N2 - The compressibilities of two AFm phases (strätlingite and calcium hemicarboaluminate hydrate) and hydrogarnet were obtained up to 5 GPa by using synchrotron high-pressure X-ray powder diffraction with a diamond anvil cell. The AFm phases show abrupt volume contraction regardless of the molecular size of the pressure-transmitting media. This volume discontinuity could be associated to a structural transition or to the movement of the weakly bound interlayer water molecules in the AFm structure. The experimental results seem to indicate that the pressure-induced dehydration is the dominant mechanism especially with hygroscopic pressure medium. The Birch-Murnaghan equation of state was used to compute the bulk modulus of the minerals. Due to the discontinuity in the pressure-volume diagram, a two stage bulk modulus of each AFm phase was calculated. The abnormal volume compressibility for the AFm phases caused a significant change to their bulk modulus. The reliability of this experiment is verified by comparing the bulk modulus of hydrogarnet with previous studies. © 2011 Elsevier Ltd. All rights reserved.

AB - The compressibilities of two AFm phases (strätlingite and calcium hemicarboaluminate hydrate) and hydrogarnet were obtained up to 5 GPa by using synchrotron high-pressure X-ray powder diffraction with a diamond anvil cell. The AFm phases show abrupt volume contraction regardless of the molecular size of the pressure-transmitting media. This volume discontinuity could be associated to a structural transition or to the movement of the weakly bound interlayer water molecules in the AFm structure. The experimental results seem to indicate that the pressure-induced dehydration is the dominant mechanism especially with hygroscopic pressure medium. The Birch-Murnaghan equation of state was used to compute the bulk modulus of the minerals. Due to the discontinuity in the pressure-volume diagram, a two stage bulk modulus of each AFm phase was calculated. The abnormal volume compressibility for the AFm phases caused a significant change to their bulk modulus. The reliability of this experiment is verified by comparing the bulk modulus of hydrogarnet with previous studies. © 2011 Elsevier Ltd. All rights reserved.

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SP - 571

EP - 578

JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 6

ER -

Pressure induced reactions amongst calcium aluminate hydrate phases

Abstract

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